{"id":7886,"date":"2026-06-03T15:00:00","date_gmt":"2026-06-03T07:00:00","guid":{"rendered":"https:\/\/www.sprintpcbgroup.com\/?p=7886"},"modified":"2026-06-03T10:55:42","modified_gmt":"2026-06-03T02:55:42","slug":"multilayer-rigid-flex-pcb-structure-guide","status":"publish","type":"post","link":"https:\/\/www.sprintpcbgroup.com\/de\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/","title":{"rendered":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?"},"content":{"rendered":"
\n\t\t\t\t
\n\t\t\t\t\t
\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

I have always felt that the most captivating aspect of electronic design lies in resolving seemingly contradictory requirements. Take circuit boards, for instance: we invariably desire them to be both sturdy and flexible\u2014a demand that often sounds as unrealistic as expecting a horse to run without needing to eat. Traditional approaches were indeed rather clumsy; they involved daisy-chaining several rigid boards together using a tangle of ribbon cables and connectors. The result was a device interior crammed to capacity, prone to frequent malfunctions.<\/p>

It was only after encountering multilayer rigid-flex PCBs<\/a> that I realized a superior design philosophy existed. This technology does not merely involve gluing two different materials together; rather, it achieves a true structural fusion. Imagine a single board featuring rigid sections capable of firmly supporting integrated circuits, alongside flexible zones designed to bend and twist\u2014forming a cohesive whole rather than a mere patchwork assembly. The core of this fusion lies in the integrated design of its internal structure: rigid layers\u2014typically composed of FR-4 or similar materials\u2014serve to anchor critical, bend-sensitive components such as core processors, high-capacity memory chips, and power modules. Conversely, the flexible regions\u2014fabricated from thin films of polyimide (PI) or polyester (PET)\u2014house the signal traces, enabling the board to bend and flex within three-dimensional space to interconnect various sections of a device or to conform to non-planar mounting surfaces. The transition between these rigid and flexible zones is not a jarring splice, but rather the result of a meticulous lamination process that ensures the copper traces flow smoothly and continuously across the two dielectric mediums, thereby guaranteeing the integrity of electrical connections and the stability of signal transmission.<\/p>

The impact of this design philosophy is tangible. I once worked on a wearable device project where, had we opted for a traditional approach, the sheer volume of connectors and wire harnesses alone would have rendered the device unacceptably bulky. By switching to a rigid-flex solution, the entire internal layout became significantly cleaner and the overall weight was substantially reduced. More importantly, reliability was enhanced\u2014by eliminating dozens of potential failure points in solder joints and interfaces, the device’s operational lifespan was naturally extended. For instance, in a smart wristband, utilizing a flexible circuit directly within the strap to host LEDs and sensors allows the device to conform comfortably to the contours of the wrist, while the rigid section\u2014housing the mainboard\u2014handles centralized power supply and data processing; this architecture drastically minimizes internal space requirements and assembly complexity.<\/p>

This design philosophy is now being adopted across a wide range of fields. For example, medical devices\u2014such as miniature sensors intended for implantation within the human body\u2014or industrial probes required to operate within confined spaces, all rely on circuit boards capable of maintaining their structural integrity while simultaneously adapting to complex environments. I view this not merely as a technological advancement, but as a fundamental shift in design thinking\u2014we are learning to make materials adapt to our needs, rather than the other way around. In devices such as cardiac pacemakers or endoscopic capsules, rigid-flex PCBs enable electronic systems to be safely and reliably encapsulated within extremely limited and irregularly shaped spaces, all while withstanding the dynamic internal environment of the human body. Similarly, in the joints of industrial robots or the monitoring modules of automotive transmission systems, these circuit boards can endure continuous mechanical motion and vibration without the risk of wear-and-tear on traditional cabling or the loosening of connectors.<\/p>

Of course, manufacturing these multi-layer rigid-flex boards is no easy feat. It demands that designers possess a profound understanding of material properties\u2014knowing precisely which material to use at each specific location and how to execute the transition in the most natural and reliable manner. The production process itself is far more intricate than that of traditional PCBs, requiring precise control over the lamination and curing stages of every single layer. Yet, when you witness the finished product operating stably under a variety of harsh conditions, you realize that every bit of that effort was well worth it. During the design phase, one must comprehensively consider bending radii, flex cycles, dynamic stress distribution, and the matching of coefficients of thermal expansion (CTE) for different materials to prevent copper foil fatigue fractures or delamination. Production, meanwhile, involves alternating cycles of lamination, pattern transfer, drilling, and plating; this demands extremely rigorous control over the process window, as any deviation in lamination pressure, temperature, or time can lead to a decline in yield rates.<\/p>

Sometimes I find myself thinking that this fusion of rigidity and flexibility actually reflects a new attitude toward technology\u2014one that no longer chases extreme, singular performance metrics, but instead seeks the optimal equilibrium point amidst various constraints. Perhaps this is why an increasing number of electronic products are adopting this design approach: it embodies a more mature and pragmatic design philosophy. This philosophy drives the evolution of design from mere “component assembly” toward “system integration,” resolving interconnection challenges at the substrate level and thereby providing a fundamental pathway for achieving product miniaturization, lightweighting, high reliability, and functional innovation.<\/p>

I often feel that many technical discussions nowadays tend to overcomplicate matters. Take circuit boards, for instance: whenever multi-layer rigid-flex boards are mentioned, people love to spout off about high-tech, cutting-edge concepts. Yet, at its core, this technology simply solves a very practical problem: how to make an electronic device both robust and flexible.<\/p>

I\u2019ve seen far too many engineers who, right from the start, fixate solely on material parameters\u2014things like the glass fiber content of FR4 or the thermal rating of polyimide. While these factors are certainly important, I believe the truly critical element is a shift in design mindset. In the past, when developing products, we tended to segregate various functional modules and string them together using a host of connectors, under the assumption that this would facilitate easier maintenance and replacement. However, in actual usage, that turned out not to be the case at all.<\/p>

Have any of you ever taken apart an older-model digital camera? You\u2019d see all those ribbon cables plugged in here and there; over time, the contacts would oxidize, and even a slight bump could result in a poor connection. I still remember repairing a DSLR camera once where the entire unit malfunctioned simply because the connector for the shutter button had come loose. Back then, I thought to myself: wouldn’t it be wonderful if all these circuits could be fabricated directly onto a single, unified board?<\/p>

And that is precisely what multi-layer rigid-flex boards are accomplishing today. It engineers load-bearing sections to be sufficiently rigid, capable of securely anchoring chips and components, while rendering sections requiring flexibility soft and pliable, allowing for free routing of circuitry within confined spaces. The most ingenious aspect is the seamless transition between these two zones, eliminating the need for fragile intermediate connectors.<\/p>

Many people may not realize the significance of this shift. It is not merely a matter of saving a few connectors; rather, it fundamentally alters the design logic of electronic products. Previously, we passively adapted to spatial constraints\u2014placing a motherboard here, wedging a battery there, and then linking them together with cables. Now, we can take a more proactive approach to internal layout planning, allowing the circuit board to contour itself to the product’s external form.<\/p>

I recall a conversation with a team developing smartwatches, discussing their experiences. Initially, they employed a traditional design scheme: the motherboard was situated beneath the watch face, with flexible printed circuit (FPC) cables routed around the wristband to connect to the sensor modules. However, testing revealed that the flex points were highly prone to breakage, resulting in consistently low manufacturing yields. They subsequently switched to a rigid-flex hybrid design, integrating the sensor area directly into the flexible section\u2014extending from the watch face all the way to the end of the wristband\u2014resulting in a far more streamlined overall structure.<\/p>

This integrated design philosophy is currently transforming numerous industries. Automotive electronics serve as a prime example; modern vehicles are now replete with screens and sensors, and traditional wiring methods are simply incapable of handling the sheer volume of signal transmission requirements. Moreover, the automotive environment is far more demanding than that of consumer electronics\u2014subject to vibration, temperature fluctuations, humidity, and other stressors\u2014making every single connection point a potential source of failure.<\/p>

I recently reviewed an industry report indicating that the market for high-end automotive circuit boards<\/a> alone is already valued at billions of dollars and continues to grow rapidly. Underlying this figure is the industry’s ever-increasing demand for reliability. After all, no one wants their autonomous driving system to malfunction simply because of a loose connector.<\/p>

In my view, the most fascinating aspect of this phenomenon is that such technological breakthroughs often stem from the most humble of observations. Engineers would look at those fragile, failure-prone connectors and ponder how to eliminate them entirely. This line of thought gave rise to the concept of integrating rigid and flexible sections into a single unit\u2014a concept that sounds deceptively simple, yet requires the coordinated efforts of the entire value chain: materials science, manufacturing processes, and design engineering.<\/p>

Today, many foldable smartphones are adopting a similar design philosophy. The hinge mechanism\u2014a critical junction that must withstand repeated flexing while simultaneously ensuring stable signal transmission\u2014simply cannot be reliably supported by traditional connection methods for any extended period. I\u2019ve noticed that some manufacturers have already developed rigid-flex PCBs capable of withstanding hundreds of thousands of bending cycles\u2014something that was practically unimaginable in the past.<\/p>

Sometimes, that is precisely how technological progress works: once you solve a specific, minor problem, you discover that the possibilities for the entire system suddenly open up. When a circuit board no longer requires a multitude of external connectors, the resulting product can be made thinner, lighter, and more reliable. This represents more than just an improvement in technical specifications; it provides designers with an entirely new set of tools.<\/p>

I recall that during my days in hardware development, my biggest headache was figuring out how to piece various modules together while still ensuring stability. Now that we have superior options available, why cling to outdated methods? Of course, the adoption of new technologies inevitably presents various challenges\u2014such as cost constraints and manufacturing complexities\u2014but aren’t these precisely the obstacles we, as technologists, are meant to overcome?<\/p>

Ultimately, truly excellent technology should be so seamless that its presence goes unnoticed. When a multi-layer rigid-flex PCB eliminates those connection points that are prone to failure, the user simply perceives the device as exceptionally intuitive and reliable to use\u2014and that is precisely the outcome we technologists strive to achieve.<\/p>

Many people tend to view multi-layer rigid-flex PCBs as something esoteric and mysterious\u2014a technology reserved exclusively for cutting-edge electronic products. In reality, this perception is somewhat misguided. After working on numerous projects, I\u2019ve discovered that the true driving force behind the advancement of this technology is rarely some earth-shattering, innovative product; rather, it is often driven by highly practical\u2014and perhaps even somewhat “mundane”\u2014requirements. Take, for instance, that seemingly unremarkable smart wristband or pair of Bluetooth earbuds you might be holding right now.<\/p>

I encountered a classic example of this with a pair of sports headphones. The designers wanted to create a snugger fit against the ear, which necessitated a curved form factor. Had they relied on traditional multi-layer rigid PCBs combined with a tangle of connecting cables, the limited internal space would have been insufficient to accommodate everything; moreover, the cables at the bending points would have been highly susceptible to fatigue and breakage. Instead, they opted to use polyimide as the material for the flexible sections, configuring several key functional modules as small, rigid “islands” interconnected by flexible circuitry acting like bridges.<\/p>

This approach brought the entire structure to life: it allowed the device to flex and conform to the contours of the ear for a comfortable fit, while simultaneously providing a stable, solid “foundation” for the internal processing chips and sensors. In truth, this solution is far more intelligent than simply attempting to make “everything flexible.” Polyimide is indeed a critical material; its resistance to both heat and bending ensures that flexible components remain trouble-free, even after enduring prolonged twisting and flexing.<\/p>

However, what I find even more worthy of contemplation is the underlying concept of “combining rigid and flexible elements.” Fundamentally, it resolves the inherent conflict between spatial constraints and operational reliability. If you want a device to be more compact and take on more organic shapes, its internal circuitry must be capable of bending and stretching; yet, you must simultaneously ensure that the core components remain rock-solid\u2014unwavering and immune to any physical instability. Consequently, the truly effective designs we see today do not blindly pursue either total flexibility or total rigidity; instead, they are robust precisely where rigidity is required, and exceptionally pliable wherever flexibility is essential.<\/p>

This principle becomes even more evident when observing its applications in medical devices. Consider, for instance, certain wearable health-monitoring patches: while the surface\u2014designed to adhere snugly to the skin\u2014is naturally composed of soft silicone, the miniature chips housed within to measure ECG signals or body temperature certainly cannot be flimsy or pliable themselves. This is precisely where the advantages of multi-layer rigid-flex PCBs come into play; they allow the precision electronic components to maintain their structural rigidity and stability, while simultaneously utilizing flexible circuitry to transmit signals and accommodate the body’s subtle movements.<\/p>

Therefore, rather than viewing this technology merely as a flashy demonstration of advanced materials science, it is more productive to understand it as an engineering philosophy dedicated to problem-solving. It is not magic, but rather an ingenious solution devised by designers grappling with a perennial challenge: “How do we pack more functionality into a limited, irregular three-dimensional space while ensuring that every component operates with unwavering stability?” Its true value lies not in the specific use of high-end materials per se, but in the conceptual fusion of rigidity and flexibility\u2014a paradigm that has genuinely expanded the frontiers of electronic product design.<\/p>

From consumer electronics to automotive systems and the medical sector, this underlying mindset is at work behind many advancements that might otherwise appear unremarkable. Its objective is not to render products more complex or enigmatic; on the contrary, it aims to simplify the integration of complex technologies, enabling them to fit more seamlessly and reliably into the myriad contexts of our daily lives.<\/p>

For a long time, I felt that the intricate world of circuit board design was something far removed from my own reality. It was only when I took the initiative to delve into it myself that I realized just how many nuances and intricacies are involved\u2014it is a discipline that can certainly never be mastered through mere haphazard assembly. Take multi-layer rigid-flex PCBs, for instance; many people assume they are simply a stack of boards layered together, but in reality, that is far from the case. They require the integration of rigid zones\u2014for component mounting\u2014and flexible zones\u2014to facilitate dynamic bending\u2014all within a single board, joined together through precise lamination and interconnection processes. This structure is commonly found in modern foldable smartphones, wearable devices, and precision medical instruments, enabling reliable electrical connectivity within compact spaces.<\/p>

I have encountered numerous engineers who, during the initial design phase, overlook the critical issue of material compatibility. Consequently, their finished products turn out either too brittle or too pliable\u2014rendering them incapable of functioning stably in real-world environments. For example, while polyimide film offers excellent flexibility, if paired with an incompatible adhesive, it becomes prone to delamination after undergoing prolonged bending cycles.<\/p>

Designing the flexible sections is a task that places a particularly high demand on experience; it cannot be resolved simply by sketching a few arbitrary lines. The routing of the traces must be carefully coordinated with the intended bending direction, utilizing curved or serpentine layouts to distribute stress and prevent sharp right-angle turns from becoming stress concentration points during bending.<\/p>

You must carefully consider the bending radius and anticipate the specific types of mechanical stress the board will be subjected to during actual operation. The requirements for bending radius and material fatigue resistance differ drastically between dynamic bending applications (such as clamshell devices) and static bending applications (where the board assumes a fixed shape after installation).<\/p>

I once encountered a case where the designer had routed the traces too close to the bending zone; as a result, the product failed\u2014due to a broken circuit\u2014within less than three months of use. This failure occurred because, during bending, the outer side of the neutral axis experiences tensile stress while the inner side experiences compressive stress. If the traces are situated within these high-stress zones, the copper foil will gradually develop micro-cracks\u2014driven by metal fatigue\u2014until the circuit eventually fractures completely.<\/p>

Such issues are completely invisible during the design phase and are often discovered only when the product reaches actual application\u2014at which point, it is already too late. Therefore, it is imperative to utilize Finite Element Analysis (FEA) software to simulate bending behavior and to fabricate physical prototypes for rigorous mechanical fatigue testing\u2014such as subjecting them to hundreds of thousands of bending cycles.<\/p>

When it comes to material selection, the process becomes even more of a headache. Beyond just the base substrate, a systematic and comprehensive evaluation is required for the selection of coverlays, adhesives, stiffeners, and even surface finish treatments. The market is currently flooded with a dazzling array of materials touted as “high-performance,” yet very few are truly suitable for your specific application. High-frequency applications require careful consideration of dielectric constant and loss factor, while high-temperature environments demand close attention to the glass transition temperature (Tg) and thermal decomposition temperature (Td).<\/p>

Some individuals, in an effort to save money, opt for inexpensive FR materials\u2014only to discover that their thermal stability falls far short of the required standards. For instance, standard FR-4 typically has a glass transition temperature (Tg) of around 130\u00b0C; under conditions of prolonged high-temperature exposure or during the wave soldering process, it is prone to deformation and performance degradation.<\/p>

Particularly in environments characterized by significant temperature fluctuations, a mismatch in material coefficients of thermal expansion (CTE) can exacerbate delamination issues. For instance, automotive electronics must withstand thermal shock ranging from -40\u00b0C to 125\u00b0C; if there are substantial differences in the CTEs of the various material layers, the internal stresses generated by thermal expansion and contraction can lead to the failure of the interlayer bonding.<\/p>

A team I know learned this lesson the hard way: the CTE of the stiffener material they used differed too drastically from that of the base substrate, causing cracks to appear in their product very quickly during temperature cycling tests. The CTE of a stiffener plate (such as stainless steel or aluminum) can differ by an order of magnitude from that of a flexible substrate (such as polyimide), generating immense shear stress at the interface.<\/p>

In reality, the transition zone between the flexible and rigid sections is the area most susceptible to failure. This region serves as the critical intersection point for both mechanical stress and electrical connections, and it is commonly referred to as the “bend initiation zone.”<\/p>

If this area is not handled properly, the overall reliability of the entire board will be severely compromised. Stress concentration can lead to coverlay wrinkling, circuit breakage, or cracked solder joints\u2014consequently triggering open circuits or intermittent failures.<\/p>

I have observed numerous design schemes where this specific region was treated far too carelessly\u2014either lacking sufficient stiffening or featuring an overly abrupt transition. For example, the change in thickness from the rigid zone to the flexible zone should be achieved through a gradual transition\u2014such as a stepped or ramped profile\u2014rather than utilizing sharp, right-angle steps.<\/p>

A robust design ensures that stress is distributed smoothly rather than being concentrated at a single focal point. Additional flexible coverlayers or localized thickening can be employed to reinforce the transition zone, and it is essential to ensure that all circuit traces crossing this boundary are oriented perpendicular to the bending axis to minimize stress.<\/p>

This necessitates integrating mechanical stress distribution considerations into the layout design phase, rather than waiting until later stages to devise remedial solutions. During the CAD design phase, specific bend zones, “keep-out” areas for routing, and strain-relief zones should be clearly defined, and collaborative simulations should be conducted in conjunction with structural engineers.<\/p>

The challenges associated with the manufacturing process are even more formidable. From laser drilling and precision etching to the alignment and lamination of multi-layer structures, every single step demands an exceptionally high level of process stability.<\/p>

The alignment precision required for multi-layer structures is extremely stringent; even a minor deviation can result in signal integrity issues. In particular, for high-speed signal layers containing microstrip or stripline structures, interlayer misalignment can alter characteristic impedance, leading to signal reflection and attenuation.<\/p>

Furthermore, different materials require distinct processing parameters; consequently, the process window must be continuously adjusted based on actual conditions. For instance, the chemical solutions, temperatures, and timing parameters used for etching polyimide and copper foil must be optimized independently, while also considering the impact of their sequential order on the overall structural integrity.<\/p>

I recall a specific project that failed because improper pressure control during the lamination process caused the flexible sections to be excessively compressed. Excessive lamination pressure can damage fine circuitry or cause adhesive squeeze-out, resulting in voids; conversely, insufficient pressure can lead to inadequate interlayer bonding strength.<\/p>

Nowadays, many manufacturers are striving for increasingly fine-line circuit designs while overlooking these fundamental process control issues. For example, they may blindly pursue line width\/spacing dimensions as fine as 2\/2 mils; however, if etching uniformity is poorly controlled, the actual yield of the finished product may be extremely low\u2014ultimately proving to be a counterproductive effort.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"multilayer\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Ultimately, when undertaking such complex designs, one cannot simply fixate on technical specifications alone. Instead, a multi-dimensional trade-off and balance must be struck among electrical performance, mechanical reliability, thermal management, manufacturability, and cost.<\/p>

I have long felt that many people\u2019s understanding of rigid-flex PCBs is somewhat misguided. People tend to isolate the “flexible” sections for discussion\u2014extolling their pliability and the number of bending cycles they can withstand\u2014as if these attributes were the sole determinants of success. In my view, however, the true key to the success or failure of a multilayer rigid-flex PCB lies precisely in those “rigid” sections and the manner in which they are integrated.<\/p>

Consider this: a single circuit board containing both flexible regions capable of bending and rigid sections providing structural support is, by its very nature, an inherent contradiction. When forcibly bonded together, the greatest risk arises during thermal expansion and contraction cycles, where the disparate materials may behave independently\u2014ultimately leading to delamination or fracturing. Therefore, throughout the entire manufacturing process, my primary focus is not on any single discrete step, but rather on the specific process that “binds” all these elements into a cohesive whole\u2014what we commonly refer to as the lamination stage.<\/p>

The challenge inherent in this stage lies in the fact that it involves processing dissimilar materials; one must simultaneously accommodate and manage the distinct behavioral characteristics of both the rigid and flexible sections. For instance, the rigid core layers are typically composed of glass-fiber-reinforced epoxy resin, which exhibits a relatively stable coefficient of thermal expansion when heated. In contrast, the flexible sections\u2014made from polyimide film\u2014are far more sensitive to temperature fluctuations; even slight heating can cause them to deform or undergo significant shrinkage.<\/p>

This implies that you cannot simply stack these layers together, apply pressure, and call it a day. Instead, you must precisely control both the rate of temperature rise and the applied pressure. This ensures that heat is distributed uniformly across every layer, allowing the resin within the prepregs to flow fully and fill every minute void, while simultaneously minimizing the mechanical stress generated between the dissimilar materials.<\/p>

I have encountered numerous instances of failure, and the root cause almost invariably lies right here. Either the temperature profile was configured incorrectly\u2014resulting in certain areas remaining under-cured while others overheated\u2014or the pressure was applied unevenly, leaving voids at the bonding interfaces that would later serve as the starting points for device failure.<\/p>

Consequently, when I evaluate the quality of a multilayer rigid-flex PCB, I rarely begin by assessing how many degrees it can bend. Instead, I first examine its cross-sectional structure to verify that the interfaces between the various materials are distinct and tightly bonded, checking for any signs of delamination or insufficient resin fill.<\/p>

This approach might not sound particularly “cool”\u2014after all, the ability to bend is arguably the most conspicuous feature of this type of board. However, experience has taught me that it is precisely these invisible details that form the true foundation for long-term operational reliability.<\/p>

A robust design should account for these manufacturing constraints from the very outset, rather than waiting until the production phase to resolve compatibility issues. This involves strategies such as judiciously positioning the transition zones between rigid and flexible sections, and avoiding the placement of critical circuitry in areas where stress is likely to concentrate.<\/p>

Ultimately, technology is a perpetual quest to transform the impossible into the possible. Within this process, understanding and respecting the inherent nature of each material\u2014and discovering how to enable them to coexist harmoniously\u2014is far more critical than merely chasing a single, extreme performance metric. Perhaps this is the most profound insight I have gained from my work with multilayer rigid-flex PCBs.<\/p>

I have recently noticed that much of the discussion surrounding multilayer rigid-flex PCBs tends to focus on impressive-sounding technical specifications. This reminds me of a conversation I had with a friend who works in medical device R&D; a specific detail he mentioned left a lasting impression on me. While developing a wearable monitoring device, his team’s initial design drafts\u2014driven by a pursuit of extreme thinness and lightness\u2014inadvertently overlooked the practical requirements of the flexible sections. As it turned out, during repetitive bending tests, the first batch of samples quickly developed issues with intermittent signal connectivity at the flex joints.<\/p>

In my view, people tend to focus too heavily on the act of “bending” itself, while overlooking the underlying physical principles. The design of a flexible zone is not an isolated concept. When you envision a multi-layer rigid-flex PCB as a unified whole, each bend does not merely place stress on a single layer of material; rather, it involves all layers working in concert\u2014either cooperatively or in mutual restraint. It is much like bending a stack of paper: the outermost sheet experiences the greatest tensile stress, while the innermost sheet is subjected to compression. If the adhesion between layers is suboptimal, or if the material properties are mismatched, a “disconnection” or delamination is highly likely to occur.<\/p>

I have encountered designs where other critical considerations were sacrificed in the pursuit of achieving a smaller bending radius. Examples include blindly reducing material thickness or selecting a substrate that is excessively “soft.” While such approaches may indeed make it easier\u2014at least initially\u2014to bend the PCB to a tight angle and fit it into a compact space\u2014such as the strap connection points on certain smartwatches or the articulating joints of an endoscope head\u2014this often comes at the expense of long-term reliability.<\/p>

One of the key factors determining whether a PCB can withstand tens of thousands of repetitive bending cycles is precisely how that “minimum bending radius” value is established. This value cannot simply be determined by copying a fixed number from a standard reference table; it must be derived through a deep integration with\u2014and careful consideration of\u2014the product’s actual application scenario.<\/p>

Take, for instance, a multi-layer rigid-flex PCB designed for the hinge area of \u200b\u200ba foldable smartphone. If the board remains in a “fixed” position while the phone is in its folded state, the situation is relatively manageable. However, if it undergoes continuous, dynamic bending\u2014much like the motion involved in opening and closing a traditional flip phone\u2014the design challenge becomes entirely different. The latter scenario imposes far more stringent requirements on the bending radius, as material fatigue emerges as a primary mode of failure. So, my perspective might differ slightly: rather than blindly chasing the absolute minimum bend radius merely to demonstrate technical prowess, it is far more productive to sit down with the structural engineers early in the design phase and have a frank discussion. Ask questions like: “How frequently will this product actually need to move? What is the magnitude of that movement? Is it possible to optimize the overall layout to provide more generous clearance for the flexible sections of the circuit board?” Often, you will discover that slightly relaxing the requirements for the bend radius can yield a massive improvement in the reliability of the entire system\u2014and may even lower costs, thanks to improved manufacturing yields!<\/p>

Ultimately, the true appeal of a multilayer rigid-flex PCB lies in its ability to establish electrical connections within a three-dimensional space, thereby unlocking a wider range of possibilities for product design. However, if we remain fixated solely on the fundamental attribute that it “can bend,” while neglecting the deeper question of “how to ensure it bends reliably over time,” we risk putting the cart before the horse. After all, no one wants to see a product they\u2019ve invested heavily in\u2014both in time and capital\u2014suffer a catastrophic failure in the market simply because of a fatigue fracture at a connection point!<\/p>

I\u2019ve long felt that many people\u2019s understanding of rigid-flex PCBs is somewhat misguided, as they tend to focus their entire attention on complex calculations. I\u2019ve encountered numerous engineers who, right from the start, cling obsessively to their simulation software, refusing to rest easy until they\u2019ve calculated the precise width and spacing of every single trace down to several decimal places. While that is certainly important, I\u2019ve found that the true keys to a successful multilayer rigid-flex project often lie in more fundamental\u2014and perhaps even somewhat “old-school”\u2014considerations. For instance, you must first grasp the fact that this is not merely a simple planar circuit, but a three-dimensional structure designed to function within a 3D space.<\/p>

I, too, learned this the hard way when I first entered this field. I once designed a prototype that, upon its return from the factory, looked absolutely pristine. However, the moment we placed it on the test bench\u2014after just a few dozen bending cycles\u2014tiny hairline cracks began to appear at the connection points. The root of the problem lay in the transition zone between the rigid and flexible sections\u2014precisely where stress concentrations are at their highest. Textbooks will tell you that this area requires “teardrops” and smooth, arced transitions. Yet, in actual practice, you\u2019ll quickly discover that simply drawing a teardrop shape in your software is woefully insufficient. You must also take into account the material compatibility across the entire region, as well as the ductility of the copper foil itself. Sometimes, to ensure stress is distributed more evenly, I will even deliberately modify the ground plane copper\u2014specifically in the rigid sections adjacent to the flexible zones\u2014by creating a mesh pattern or removing portions of the non-critical copper. This might sound counterintuitive, but it effectively releases a certain amount of internal stress, thereby preventing fatigue fractures.<\/p>

Speaking of warping, this is a troublesome issue encountered with almost all multilayer PCBs; however, on rigid-flex boards, the consequences are particularly severe. This is because once the board becomes uneven, subsequent surface-mount soldering operations are almost guaranteed to run into problems. Many people assume that simply designing a stack-up with left-to-right symmetry is sufficient; in reality, however, that serves merely as an idealized starting point. During the actual lamination process, the differing coefficients of thermal expansion among the various materials present a significant challenge. For instance, the polyimide flexible material and the FR4 rigid material you employ will expand and contract at different rates when subjected to heat. If one mechanically pursues layer symmetry while neglecting the inherent physical property differences of the materials themselves, the board will inevitably twist and deform once it cools down after lamination.<\/p>

In my experience, “dummy copper” (or balancing copper) is a valuable tool, but it must not be misused. You must strategically add these balancing copper blocks based on the actual copper density distribution of each specific layer, rather than simply filling every blank area indiscriminately. Occasionally\u2014in order to balance the stress in a particular region\u2014I will even deliberately place a small, isolated patch of copper on a layer that is otherwise devoid of traces, effectively using it as a “counterweight.” This process cannot be reduced to a simple formula; it relies entirely on experience and a deep understanding of the materials involved.<\/p>

As for routing\u2014particularly in areas subject to frequent flexing\u2014my guiding principle is: “Keep it as simple as possible.” I try to avoid routing high-speed signal lines or power lines through these zones whenever possible; if it is absolutely unavoidable, I ensure the traces run perpendicular to the primary flex axis and utilize the widest possible arcs for any turns. Sharp angles must be strictly avoided, as they act like tiny stress concentration points that can become the starting points for fractures during repeated flexing cycles. Furthermore, on multilayer rigid-flex boards, the layout of internal traces plays an equally critical role in determining the overall flexibility and reliability of the assembly; one cannot simply focus on the outermost surface layers.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"multilayer\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

Ultimately, designing a high-quality rigid-flex PCB is somewhat akin to performing a surgical procedure to construct the skeletal structure and joint connections for a piece of precision instrumentation. You cannot simply focus on how to join the “bones” together; you must also consider how they will move in the future, what forces they will be subjected to, and how they will react under various environmental conditions. Theoretical calculations and simulation data are undoubtedly important tools, but they cannot replace your comprehensive judgment regarding material properties, manufacturing constraints, and the ultimate application scenario. Whenever I receive a new project requirement, I first spend a significant amount of time contemplating the device in which the circuit board will eventually be housed\u2014how it will move, and what environmental challenges it will face\u2014before I even open the design software to start drafting schematics. This, I suppose, constitutes that subtle distinction between theory and practice.<\/p>

Whenever I examine the intricate internal structures of complex electronic devices, a specific question invariably crosses my mind: Are we perhaps placing too much emphasis on theoretical design while neglecting the rigorous trials of real-world usage? Take, for instance, the increasingly ubiquitous multi-layer rigid-flex PCBs; while they undeniably resolve challenging spatial layout issues, who can guarantee\u2014once they land in the hands of users and endure thousands upon thousands of folding and bending cycles\u2014that they will continue to function reliably?<\/p>

I have observed numerous engineers who, during the design phase, harbor overly idealized expectations regarding the device’s flex zones. They assume that as long as the materials are of high quality and the structural design is sound, the device will be able to withstand the rigors of daily wear and tear. Reality, however, is often far more unforgiving. Users may completely disregard the “correct folding procedures” outlined in the instruction manual\u2014particularly with wearable devices that require frequent opening and closing\u2014meaning the flexible components are often subjected to stresses far exceeding the parameters established in laboratory testing. Consequently, relying solely on theoretical metrics for bending lifespan holds little practical significance; what truly matters is whether the component demonstrates consistent performance across a spectrum of bending angles and applied forces.<\/p>

Regarding reliability validation, I perceive a somewhat concerning trend currently prevailing within the industry: an excessive reliance on standardized testing protocols\u2014for instance, placing undue emphasis on passing a specific number of thermal cycles or achieving a precise numerical value for peel strength. While these benchmarks are certainly important, they serve more as “admission tickets” to the market than as definitive guarantees of product quality. What truly reflects the caliber of a multi-layer rigid-flex PCB are, in fact, those non-standardized “stress tests”\u2014such as simulating sudden, abrupt bending under extreme environmental conditions, or monitoring changes in electrical performance after prolonged exposure to a semi-folded state. Such scenarios are remarkably common in actual usage, yet they frequently fall outside the scope of standard testing protocols. Another point that is often overlooked is the impact of mechanical stress introduced during the assembly process. A circuit board may meet every specification perfectly upon leaving the factory; however, once other components\u2014particularly heavier chips\u2014are soldered onto it, the stress distribution across the entire structure changes completely. Consequently, if one were to subsequently test the fatigue life of the flexible regions, the resulting data would differ significantly from that obtained during isolated testing. Therefore, rather than merely chasing high standards on paper, I believe it is more prudent to give greater consideration to the final product form during the design phase, ensuring that sufficient strain margins are incorporated.<\/p>

Regarding testing methodologies, I tend to favor long-term monitoring within actual product environments over sole reliance on accelerated aging tests conducted in a laboratory. This is because many issues\u2014such as metal fatigue or the degradation of adhesive layers\u2014do not progress in a linear fashion. Everything may appear sound right up to a certain critical threshold; yet, once that threshold is crossed, performance can deteriorate precipitously. In the case of rigid-flex multilayer PCBs, this critical point frequently manifests at the interface between the rigid and flexible sections\u2014the very location where stress is most concentrated and, consequently, where failures are most likely to occur.<\/p>

In conclusion, the reliability of flexible electronic products is never determined by a single factor alone. From material selection to structural design, and from manufacturing processes to final assembly, every single step influences the product’s durability. Therefore, rather than fixating on a specific technical parameter, it is far more beneficial to adopt a comprehensive perspective on quality. After all, end-users will not overlook a device’s actual failure simply because its circuit board has passed a specific certification; what they truly care about is whether the device in their hands can stand the test of time.<\/p>

I\u2019ve long felt that many people have a somewhat skewed understanding of multi-layer rigid-flex PCBs. The moment this technology is mentioned, people seem to automatically associate it exclusively with highly sophisticated, high-end sectors. In reality, however, it is much closer to our daily lives than one might imagine.<\/p>

Take, for instance, a smart wristband I recently disassembled. The tiny circuit board inside is a textbook example of a rigid-flex design. You can clearly see several rigid sections\u2014cleverly positioned to handle core processing and power management\u2014connected by circuitry that possesses a distinctively flexible texture. The most immediate benefit of this design is space efficiency; it allows the entire device to be manufactured in an incredibly thin and compact form factor. This structure enables the circuit board to fold or bend within a three-dimensional space, thereby making full use of the device’s irregular, confined internal cavities\u2014something a purely rigid board simply cannot achieve. For example, the curved wristband section requires flexible circuitry to conform to the contours of the human wrist while reliably transmitting sensor data back to the main board.<\/p>

Of course, this does not imply that this technology is unimportant in high-end sectors. Quite the contrary: it is precisely because it can simultaneously satisfy the demands for both rigidity and flexibility that it becomes so uniquely valuable. In aerospace or military communication equipment, rigid-flex PCBs are engineered to withstand extreme vibration and thermal shock. Their inherent reliability stems from precise lamination processes and rigorous validation testing\u2014such as undergoing thousands of dynamic bending cycles\u2014to ensure the integrity of every connection.<\/p>

I have observed some engineers who, during the design phase, become overly fixated on achieving a so-called “higher class” rating. For instance, they might be designing a consumer-grade product where a Class 1 standard would be perfectly adequate, yet they insist on selecting materials and defining production processes according to Class 3 requirements. This drives manufacturing costs up several-fold, ultimately rendering the product’s final pricing uncompetitive. The Class 3 standard typically demands an extremely low defect rate and is reserved for critical systems\u2014such as life support or flight control systems\u2014requiring production lines situated in cleanroom environments and utilizing more expensive base materials, such as high-frequency, high-speed laminates like Rogers boards<\/a>.<\/p>

This, in fact, is a common misconception. The classification of different grades is inherently intended to suit various application scenarios, rather than to distinguish between superior and inferior quality.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t

\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"multilayer\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t
\n\t\t\t\t\t\t\t\t\t

For most everyday electronic products, the requirement for reliability is simply to ensure stable operation throughout their normal service life\u2014not to withstand extreme environments or to mitigate the consequences of catastrophic failure. A smartphone, for instance, may have an expected lifespan of only a few years; during this time, it is likely to experience temperature fluctuations and minor physical deformation. A Class 1 rigid-flex PCB is perfectly capable of handling such conditions, rendering additional reinforcement against extreme cold or prolonged high-temperature environments unnecessary.<\/p>

Therefore, the key lies in truly understanding the specific requirements of your product. To cite another example, many home-use medical devices\u2014such as portable monitoring equipment\u2014have recently begun adopting this type of design. Devices like continuous glucose monitors or wearable ECG patches require the integration of sensors and processing units within a confined space while simultaneously ensuring a certain degree of durability, as users may remain active while wearing them. Since these devices are often worn directly against the body\u2014and may even come into contact with perspiration\u2014the flexible sections must possess excellent biocompatibility and corrosion resistance, while the rigid sections must provide effective shielding against signal interference.<\/p>

This is precisely where the advantages of a multi-layer rigid-flex PCB become apparent: it offers stable electrical connectivity while simultaneously accommodating a certain degree of physical deformation\u2014making it a far more suitable choice than either a purely rigid or a purely flexible board. While purely flexible boards are pliable, they lack structural support and component-carrying capacity; conversely, purely rigid boards are ill-suited for the dynamic demands of wearable applications.<\/p>

However, there is a critical detail that requires careful attention: material compatibility. The physical properties\u2014specifically, the coefficient of thermal expansion\u2014differ between the materials typically used for the rigid sections (such as FR4) and those used for the flexible sections (such as polyimide). If the design and manufacturing processes are not executed with precision, the interface between these materials becomes susceptible to failure following exposure to temperature fluctuations or repeated flexing. During manufacturing, a seamless transition must be achieved through precise coverlay window designs and stress-relief structures\u2014such as employing a graduated copper thickness or incorporating stiffeners at the rigid-flex interface\u2014to prevent copper foil fatigue and fracture during bending.<\/p>

This challenge cannot be resolved simply by adhering two different types of boards together; rather, it demands a comprehensive, systemic approach encompassing every stage from design through manufacturing. From avoiding the placement of vias within bending zones during circuit layout, to precisely controlling temperature and pressure during the lamination process to ensure tight adhesion between disparate material layers, every single step plays a pivotal role in determining the ultimate lifespan and performance of the finished product. That is why I have always felt that, rather than mythologizing this type of technology as some sort of “black magic,” it is better to view it simply as a tool for solving problems.<\/p>

Its true value lies not in how technologically advanced it is in and of itself, but rather in its ability to precisely and effectively meet the specific requirements of a given scenario. In automotive electronics, for instance, it is used to connect the wiring harnesses between the central console and the vehicle doors, thereby saving space and reducing weight; in digital cameras, it enables reliable connectivity between the lens module and the mainboard within a confined space.<\/p>

Sometimes, the most elegant design is precisely the one that achieves the required functionality at the most appropriate cost\u2014rather than one that blindly piles on the highest possible technical specifications.<\/p>

I have long felt that many people\u2019s understanding of multi-layer rigid-flex PCBs is somewhat misguided. It is certainly true that they can save space, reduce weight, and enhance reliability\u2014there is no dispute there. However, I have observed a rather interesting phenomenon: whenever the topic comes up, people tend to gravitate immediately toward the most cutting-edge, high-tech domains.<\/p>

It is almost as if one cannot appear sufficiently “professional” without citing examples involving medical implants or satellite and missile systems.<\/p>

In reality, however, its application scenarios extend far beyond those fields. The most impressive example I have ever encountered was within a consumer-grade smart wearable device. The device was crafted to be incredibly thin and lightweight\u2014so much so that you could barely feel it on your wrist. Its core component was a cleverly designed multi-layer rigid-flex PCB that seamlessly integrated the sensors, the main control unit, and the battery; the entire structure was remarkably compact, featuring virtually no superfluous cables or connectors.<\/p>

This is precisely the point I wish to emphasize most: the true value of this technology lies in the degree of design freedom it affords.<\/p>

Consider, for a moment, the traditional design paradigm: typically, one begins by laying out one or more rigid circuit boards, then figures out how to interconnect them using cables or flexible ribbon cables, and finally selects appropriate connectors to secure everything in place.<\/p>

Throughout this process, both the external form factor and the internal layout of your product are effectively constrained\u2014or “boxed in”\u2014by those pre-existing, off-the-shelf standard components. You are forced to accommodate their specific dimensions, shapes, and mounting requirements.<\/p>

The philosophy behind multi-layer rigid-flex PCBs, however, is the exact opposite. It allows you to begin by envisioning the product’s final physical form and functional requirements, and then determine how the circuitry should be routed\u2014identifying which sections require flexibility and which must remain rigid and stable. You can design the circuit board itself to function as a structural component\u2014allowing it to adapt to the product’s design, rather than forcing the product to adapt to a disparate collection of circuit modules and connectors.<\/p>

The transformative impact of this approach is fundamental in nature. For instance, a small-batch project we previously undertook involved a data acquisition module designed for use in a specialized environment. The available space was highly irregular; using traditional methods would have required three or four small PCBs\u2014plus a tangle of flying leads\u2014to get the job done, and even then, reliability would have remained a concern.<\/p>

Subsequently, we decided to utilize a four-layer rigid-flex PCB, integrating the entire system into a single cohesive unit. The flexible sections acted like bridges, spanning across various structural components, while the rigid sections provided stable mounting points and heat dissipation surfaces. Ultimately, not only was the overall volume reduced by more than half, but the assembly process was also significantly simplified, as we eliminated the need for extensive manual soldering of connectors and ribbon cables.<\/p>

Of course, adopting this approach places significantly higher demands on design expertise. You need to possess not only circuit design knowledge but also a solid understanding of mechanical structures and material properties. Critical parameters\u2014such as the bending radius of the flexible sections, the routing patterns, and the transition zones between the flexible and rigid areas\u2014require rigorous simulation and validation. Even a slight oversight can lead to stress concentration, potentially resulting in structural failure.<\/p>

Furthermore, the cost economics must be carefully calculated. Although this approach eliminates the need for numerous connectors and wire harnesses, the manufacturing cost of the PCB itself\u2014particularly as the layer count increases\u2014remains substantial; therefore, it may not be a suitable solution for every product. For products where space and weight constraints are less critical, or those featuring inherently regular structural layouts, the traditional “rigid PCB plus connectors” approach may still prove to be the more economical and practical choice.<\/p>

Consequently, my view is that we should not deify this technology as a “universal panacea”; rather, it is best understood as a powerful design language. When a project you are working on faces insurmountable constraints regarding space, reliability, or unique form factors\u2014leaving you with seemingly no other options\u2014this technology can open a new door, offering you the opportunity to create something truly distinctive.<\/p>

Many people assume that selecting a supplier for multilayer rigid-flex PCBs is simply a matter of finding the lowest price or the biggest name in the industry. This mindset is actually quite risky. I have witnessed numerous projects fail precisely because of this assumption; the resulting products either suffered from unstable performance or simply lacked the durability to withstand real-world usage. Selecting a supplier requires a multi-dimensional assessment; focusing on just a single criterion is simply not sufficient.<\/p>

Let’s start with technical capability.<\/p>

This involves far more than simply asking them how many layers they are capable of manufacturing.<\/p>

You need to verify whether they truly possess the capability to handle complex structural requirements\u2014for instance, in areas that require repeated flexing\u2014and whether their design methodology genuinely accounts for the mechanical stresses encountered during actual operation.<\/p>

Some suppliers make grandiose claims about their capabilities, but if you ask them to produce a sample to test for bending cycle longevity or impedance continuity, their limitations may be immediately exposed. Process compatibility is absolutely critical. No matter how brilliant your design concept may be, if their production line cannot execute it\u2014or if the resulting yield is extremely low\u2014you are ultimately the one who will suffer the consequences.<\/p>

I recommend against simply taking their word for it; ideally, you should visit their facility in person to observe their production workflows and quality control checkpoints. For instance, observe how they control the precision of coverlay window openings, or how they manage the adhesion strength between the PI substrate and copper foil during the lamination process; these subtle details directly determine the durability of the final product. An experienced engineering team can often recommend a more suitable combination of materials and bending radii based on your specific application scenario\u2014such as within the interior of a frequently moving robotic arm or at the hinge mechanism of a foldable smartphone.<\/p>

Another factor\u2014one that is often underestimated\u2014is the certification system.<\/p>

Many people assume that simply possessing an ISO 9001 certificate is sufficient, but the reality is far more complex.
If your circuit board is intended for use in specialized environments\u2014such as within automotive systems or medical devices\u2014then the relevant industry-specific certifications represent far more than just a piece of paper; they signify a deep understanding of specific risks and regulatory compliance requirements.<\/p>

A supplier that has successfully passed rigorous industry certification audits typically possesses a more mature and robust system for material selection and process control, which can help you mitigate numerous potential risks.<\/p>

Of course, certification is not a panacea, but it serves as a crucial initial screening threshold. Taking automotive electronics as an example: suppliers certified under IATF 16949 typically possess more sophisticated systems for Failure Mode and Effects Analysis (FMEA) and Statistical Process Control (SPC). This ensures that the interconnect reliability of the PCB remains within specifications, even when subjected to high temperatures, mechanical vibration, or prolonged thermal cycling. Similarly, the ISO 13485 standard for medical devices places a strong emphasis on the meticulous control of product traceability and clean manufacturing environments.<\/p>

Another dimension that is frequently overlooked is collaborative capability.<\/p>

There are often “gray areas” and ambiguities bridging the gap between the design and production phases of rigid-flex PCBs; an exceptional supplier should be able to intervene proactively and offer design recommendations from a manufacturing perspective.
For instance, they might advise you on how to optimize the transition zones in bending areas to prevent cracking, or suggest specific stacking arrangements that facilitate better impedance control.<\/p>

This level of in-depth technical support is far more valuable than merely attempting to apply remedial fixes after a problem has already arisen.<\/p>

True collaboration is achieved when both parties are willing to view issues from the other’s perspective, working together to identify the most viable and effective solution. In practical terms, this means the supplier’s engineering team is willing to invest the time to understand your electrical performance and mechanical assembly requirements\u2014perhaps even utilizing simulation software to proactively analyze potential stress concentration points. Their feedback might involve fine-tuning the placement of stiffener ribs in rigid zones by a few millimeters, or recommending the use of low-profile copper on specific layers to minimize signal loss. Such early-stage optimizations can significantly boost the “first-pass success rate” of your design.<\/p>

Ultimately, selecting a supplier is a process of comprehensive judgment.<\/p>

Price is, of course, a factor to consider, but it should not be the primary metric.<\/p>

Reliability, technical compatibility, quality consistency, and the ease of long-term collaboration\u2014collectively, these factors often carry far greater weight.<\/p>

After all, if a critical PCB fails, the resulting losses could easily dwarf the meager savings you might have realized on the unit price during procurement.<\/p>

Investing a little extra time in upfront evaluations\u2014engaging in deep technical and quality control discussions with potential suppliers\u2014is absolutely worth it in the long run.<\/p>

I often feel that many people harbor a misconception regarding rigid-flex PCBs. It seems that the mere mention of the word “flexible” instantly shrouds the technology in an aura of mystery and expense, leading people to view it with the kind of awe usually reserved for cutting-edge, esoteric high-tech. In reality, however, there is nothing particularly mystical about it.<\/p>

I\u2019ve encountered numerous consumer electronics teams that were initially quite resistant to adopting multi-layer rigid-flex PCBs. They felt such technology was strictly for high-end applications\u2014like satellites or medical devices\u2014and was an unnecessary complication for standard consumer products. However, they eventually realized this wasn’t the case at all. Today, many everyday devices\u2014such as the intricate, curving interconnects found inside true wireless earbuds or the internal modules within smartwatches\u2014have become entirely dependent on this design approach. Its greatest benefit isn’t some nebulous “black magic” technology, but rather a tangible solution to spatial constraints: it transforms areas that would typically require separate connectors and cables into a single, integrated circuit, thereby conserving precious internal space while simultaneously enhancing overall reliability.<\/p>

Of course, finding the right supplier can be a hassle. Some manufacturers tend to overcomplicate their processes\u2014describing them in overly technical jargon\u2014only to quote an exorbitant price that makes you feel the cost is somehow justified. My advice, based on experience, is not to be intimidated by the technical terminology. Instead, consult multiple vendors and compare exactly how they execute the “flex-to-rigid transition.” Some manufacturers possess mature processes and excellent yield control, allowing them to offer much more reasonable pricing. The critical factor to look for is their ability to ensure the reliability of the interface between the rigid and flexible sections\u2014that is the true core of the technology. As for cost, I don’t think one should focus solely on the fact that the unit price is several times higher; you have to look at the big picture. By utilizing a multi-layer rigid-flex PCB, you might eliminate a connector, reduce several potential solder failure points, and simplify the assembly process. The money and time saved through these efficiencies could easily outweigh the price difference of the circuit board itself. Consequently, when I evaluate projects these days, I prioritize whether the overall design is optimal rather than whether individual components are the cheapest.<\/p>

Ultimately, technology is merely a tool\u2014don’t put it on a pedestal. The key lies in knowing how to utilize it effectively; sometimes, a simple rigid-flex design proves far more useful than simply stacking up a pile of high-end components.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more… within the device’s interior.<\/p>","protected":false},"author":1,"featured_media":7849,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[51],"tags":[],"class_list":["post-7886","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blogs"],"blocksy_meta":[],"yoast_head":"\nWhat structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?<\/title>\n<meta name=\"description\" content=\"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sprintpcbgroup.com\/de\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\" \/>\n<meta property=\"og:locale\" content=\"de_DE\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?\" \/>\n<meta property=\"og:description\" content=\"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.sprintpcbgroup.com\/de\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"SprintpcbGroup\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61582505616626\" \/>\n<meta property=\"article:published_time\" content=\"2026-06-03T07:00:00+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"600\" \/>\n\t<meta property=\"og:image:height\" content=\"400\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"sprintpcbgroup\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@xipu386771\" \/>\n<meta name=\"twitter:site\" content=\"@xipu386771\" \/>\n<meta name=\"twitter:label1\" content=\"Geschrieben von\" \/>\n\t<meta name=\"twitter:data1\" content=\"sprintpcbgroup\" \/>\n\t<meta name=\"twitter:label2\" content=\"Gesch\u00e4tzte Lesezeit\" \/>\n\t<meta name=\"twitter:data2\" content=\"53\u00a0Minuten\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\"},\"author\":{\"name\":\"sprintpcbgroup\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/48232cc26996f1be5bd985c6d4c86261\"},\"headline\":\"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?\",\"datePublished\":\"2026-06-03T07:00:00+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\"},\"wordCount\":9412,\"publisher\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#organization\"},\"image\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp\",\"articleSection\":[\"blogs\"],\"inLanguage\":\"de\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\",\"url\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\",\"name\":\"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?\",\"isPartOf\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp\",\"datePublished\":\"2026-06-03T07:00:00+00:00\",\"description\":\"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.\",\"breadcrumb\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#breadcrumb\"},\"inLanguage\":\"de\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage\",\"url\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp\",\"contentUrl\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp\",\"width\":600,\"height\":400,\"caption\":\"multilayer rigid flex pcb factory equipment display.-2\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.sprintpcbgroup.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#website\",\"url\":\"https:\/\/www.sprintpcbgroup.com\/\",\"name\":\"SprintpcbGroup\",\"description\":\"One-stop supplier of high-end PCB manufacturing and assembly for small and medium batches.\",\"publisher\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.sprintpcbgroup.com\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"de\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#organization\",\"name\":\"SprintpcbGroup\",\"url\":\"https:\/\/www.sprintpcbgroup.com\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/01\/sprintpcbgroup-pcb-manufacturer-site-icon.png\",\"contentUrl\":\"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/01\/sprintpcbgroup-pcb-manufacturer-site-icon.png\",\"width\":500,\"height\":500,\"caption\":\"SprintpcbGroup\"},\"image\":{\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/profile.php?id=61582505616626\",\"https:\/\/x.com\/xipu386771\",\"https:\/\/www.linkedin.com\/company\/33304071\/admin\/page-posts\/published\/\",\"https:\/\/www.youtube.com\/@Sprint-PCB\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/48232cc26996f1be5bd985c6d4c86261\",\"name\":\"sprintpcbgroup\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"de\",\"@id\":\"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/fdbddef1ebb9e597362f2411c721f1621acddc3f3c4fcab08845d7163e7544de?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/fdbddef1ebb9e597362f2411c721f1621acddc3f3c4fcab08845d7163e7544de?s=96&d=mm&r=g\",\"caption\":\"sprintpcbgroup\"},\"sameAs\":[\"https:\/\/www.sprintpcbgroup.com\"]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?","description":"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.sprintpcbgroup.com\/de\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/","og_locale":"de_DE","og_type":"article","og_title":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?","og_description":"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.","og_url":"https:\/\/www.sprintpcbgroup.com\/de\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/","og_site_name":"SprintpcbGroup","article_publisher":"https:\/\/www.facebook.com\/profile.php?id=61582505616626","article_published_time":"2026-06-03T07:00:00+00:00","og_image":[{"width":600,"height":400,"url":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp","type":"image\/webp"}],"author":"sprintpcbgroup","twitter_card":"summary_large_image","twitter_creator":"@xipu386771","twitter_site":"@xipu386771","twitter_misc":{"Geschrieben von":"sprintpcbgroup","Gesch\u00e4tzte Lesezeit":"53\u00a0Minuten"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#article","isPartOf":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/"},"author":{"name":"sprintpcbgroup","@id":"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/48232cc26996f1be5bd985c6d4c86261"},"headline":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?","datePublished":"2026-06-03T07:00:00+00:00","mainEntityOfPage":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/"},"wordCount":9412,"publisher":{"@id":"https:\/\/www.sprintpcbgroup.com\/#organization"},"image":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp","articleSection":["blogs"],"inLanguage":"de"},{"@type":"WebPage","@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/","url":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/","name":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?","isPartOf":{"@id":"https:\/\/www.sprintpcbgroup.com\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage"},"image":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage"},"thumbnailUrl":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp","datePublished":"2026-06-03T07:00:00+00:00","description":"In the realm of electronic design, few challenges are as fascinating as balancing seemingly contradictory requirements. Traditional circuit boards struggle to reconcile the need for both structural rigidity and operational flexibility; however, the multilayer rigid-flex PCB offers an elegant solution. Far from being a mere patchwork assembly, this technology structurally integrates rigid support with flexible bending capabilities, ensuring that critical components remain securely anchored. At the same time, signal traces flow with unhindered flexibility. This integrated design approach allows for a more... within the device's interior.","breadcrumb":{"@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#breadcrumb"},"inLanguage":"de","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/"]}]},{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#primaryimage","url":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp","contentUrl":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/06\/multilayer-rigid-flex-pcb-manufacturing-equipment-2.webp","width":600,"height":400,"caption":"multilayer rigid flex pcb factory equipment display.-2"},{"@type":"BreadcrumbList","@id":"https:\/\/www.sprintpcbgroup.com\/blogs\/multilayer-rigid-flex-pcb-structure-guide\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.sprintpcbgroup.com\/"},{"@type":"ListItem","position":2,"name":"What structural framework lies behind the multilayer rigid-flex PCB\u2014a technology that masterfully balances both rigidity and flexibility?"}]},{"@type":"WebSite","@id":"https:\/\/www.sprintpcbgroup.com\/#website","url":"https:\/\/www.sprintpcbgroup.com\/","name":"SprintpcbGroup","description":"One-stop supplier of high-end PCB manufacturing and assembly for small and medium batches.","publisher":{"@id":"https:\/\/www.sprintpcbgroup.com\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.sprintpcbgroup.com\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"de"},{"@type":"Organization","@id":"https:\/\/www.sprintpcbgroup.com\/#organization","name":"SprintpcbGroup","url":"https:\/\/www.sprintpcbgroup.com\/","logo":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.sprintpcbgroup.com\/#\/schema\/logo\/image\/","url":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/01\/sprintpcbgroup-pcb-manufacturer-site-icon.png","contentUrl":"https:\/\/www.sprintpcbgroup.com\/wp-content\/uploads\/2026\/01\/sprintpcbgroup-pcb-manufacturer-site-icon.png","width":500,"height":500,"caption":"SprintpcbGroup"},"image":{"@id":"https:\/\/www.sprintpcbgroup.com\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/profile.php?id=61582505616626","https:\/\/x.com\/xipu386771","https:\/\/www.linkedin.com\/company\/33304071\/admin\/page-posts\/published\/","https:\/\/www.youtube.com\/@Sprint-PCB"]},{"@type":"Person","@id":"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/48232cc26996f1be5bd985c6d4c86261","name":"sprintpcbgroup","image":{"@type":"ImageObject","inLanguage":"de","@id":"https:\/\/www.sprintpcbgroup.com\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/fdbddef1ebb9e597362f2411c721f1621acddc3f3c4fcab08845d7163e7544de?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/fdbddef1ebb9e597362f2411c721f1621acddc3f3c4fcab08845d7163e7544de?s=96&d=mm&r=g","caption":"sprintpcbgroup"},"sameAs":["https:\/\/www.sprintpcbgroup.com"]}]}},"_links":{"self":[{"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/posts\/7886","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/comments?post=7886"}],"version-history":[{"count":0,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/posts\/7886\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/media\/7849"}],"wp:attachment":[{"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/media?parent=7886"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/categories?post=7886"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.sprintpcbgroup.com\/de\/wp-json\/wp\/v2\/tags?post=7886"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}