Rigid Flexible PCBs

Rigid Flexible PCBs

Rigid Flexible PCB

Flex and Rigid Flexible circuits have continuously progressed from the periphery of electronics connections to the core since their invention. Flex and Rigid Flexible circuits can now be found in a wide range of goods, from the simplest to the most complicated.

There are several causes for this push to the center, most of which are linked to the benefits they provide. This will become evident after looking at a few of the perks and advantages. These are a solution to the challenges associated with natural product labels. Flex circuits were frequently used because they aid in the integration of devices into the products they serve.

They are a genuine three-dimensional approach that allows electrical components and functional/operation features (such as controls, displays, and connections) to be positioned in appropriate locations within the device to ensure user ease of use. They could be folded and shaped across the borders to suit the spaces available without dismantling the structure.

They aid in the reduction of assembling expenses. Assembly used to be a collection of distinct circuits or connectors before the widespread adoption of a flex circuit. As a result of this predicament, several various parts were purchased, kitted, and assembled.

Rigid flexible reduces the possibility of individual mistakes. The possibility of human error in making interconnection is avoided since they are built as an embedded system assemblage with all linkages regulated by the layout artwork. That's also particularly true when isolated cables are being used to link things together.

Rigid Flexible could help a product's weight and volumetric needs be reduced. The weight of flexible circuits is significantly less than that of stiff devices. It could save up to 60percent of weight and area for the end-product as contrasted to rigid circuits solutions, dependent on the elements being used and the particular design of the assembling and finished products.


Rigid Flexible makes dynamic flexibility easier. Almost all flex circuits were made to be folded or flexed. Even the very small stiff circuits have indeed been capable of serving to a limited extent in some uncommon situations. Flex circuits, on the other hand, are the ideal option when the dynamical flexibility of a circuit was necessary to satisfy the project goals.

Rigid Flexible help with thermal control and are ideal for high-temperature situations. Rigid Flexible could not only withstand the heat, but their thinness helps it to disperse it more effectively than broader, less thermal conducting dielectric materials.

Rigid Flexible is inherently more dependable. The flexible circuit could assist simplify the assembling process by reducing the number of linkages that would otherwise be needed if solder were used. A primary goal of a dependable design is to reduce complexities. When it comes to reducing the number of solder linkages, reliability engineers are well aware that soldering linkages are where the majority of electronics system problems happen. Reducing the number of failing points should lead to an increase in item durability.

Manufacturing of Rigid Flexible PCBs

When compared to building standard circuit boards, designing Rigid Flexible designs is complicated. The manufacturing procedure begins with the creation of a PCB layout using PCB design tools such as DesignSpark PCB, Proteus, Eagle, or CAD. The technique is easy to use, but anyone having minimal or no technological knowledge may get started creating the necessary PCB layouts.

Rigid Flexible PCBs were made by stacking layers of rigid and flexible material surfaces inside an ordered fashion and connecting them with plating via hole. The Rigid Flexible solutions' dependability and robustness eliminate the extreme heat and contracting issues that connections and harness cause.

Rigid Flexible PCBs have been here for a long time, and their manufacturing method has developed with time. Glass fiber epoxy resin (FR4) will be used as an exterior stiff board in the Rigid Flexible PCB manufacturing method, and soldering masking is put on the rigid layer to fix the structure of the rigid circuits. The flex substrates were made out of double-layer polyimide (PI) information carriers in copper, with an acrylic coating was using to safeguard the flexibility layout design.

The manufacture processes for generating Rigid Flexible circuits would be as follows.

  • Preparation of the foundation material
  • Create a circuit diagram.
  • Copper lamination should be etched.
  • Drilling using a mechanical drill bit that is extremely accurate
  • Plating in through-holes
  • A covering plate will keep the boar safe.


The Rigid Flexible board has great mechanical and electrically efficiency, yet the flex composition allows it to be flexed in any form. The flex substrates materials offer not only efficiency and also dynamic strength, making the card ideal for resistance management and high-frequency signals transfer.

The strong water uptake ratio and strong coefficients of thermal expansions of flexible substrate materials assure size tolerances accumulating, effective circuits patterns, drills, layer up, and plated.

Application of Rigid Flexible PCBs

Rigid Flexible layouts were employed in a variety of situations where the board's flex must be achieved without impacting the design's stiffness.

They're used in commercial, professional, and army settings. It caters to all types of digital cameras, mobile phones, and electronic objects. Because of their reducing weight, space-saving, and adaptable abilities, they are particularly popular in the health business for producing pacemakers.

Such boards are designed to handle delicate and fragile wires, reducing connection difficulties and increasing durability. In Rigid Flexible designs, just a few soldered joints are required, resulting in good connecting reliability and making them suitable for automotive and tests and measurement applications.

Those circuits are much less expensive to produce since they involve less logistic and assembling costs. They are ideal for bar code readers and computers servers operations due to their lightweight and tiny size.

Rigid Flexible PCB Design Guidelines

Its adaptability and efficiency enable users to create three-dimensional ideas and objects that are offset by a variety of problems. Traditional Rigid Flexible PCB layouts enable you to attach your device's ports, connections, and casings to the assembly's physically weaker rigid section. In older models, the flex circuitry simply functioned as an interconnection while minimizing the volume and increasing vibrations tolerance.

Newer Rigid Flexible PCB designing standards have been established as a result of new products and enhanced flex circuit technology. The designing teams can now position elements anywhere on the flexible circuit space. When you combine this flexibility with a multilayered method to Rigid Flexible design, you and your colleagues can incorporate additional circuitry into their layout. Having this independence, though, brings with it a few new issues in terms of routes and holes.

Bending lines in flexible connections are always present and have an impact on navigation. You can't put devices or vias close to a bending line because it risks materials stress.

Bend flexible circuitry generates recurrent mechanical loads on a surface-mount pad as well as through holes, also when elements are correctly positioned. By employing a through-hole plate and augmenting pad supports with more-overlay to secure the pad, your staff may lessen those pressures.

Adopt procedures that lessen the load on your circuits while designing your trace routing. When conveying a supply or grounding plane on a flexible circuit, utilize a hatching polygon to preserve flex.

These techniques help to reduce tension and weak places. Another excellent practice for double-sided flexible circuits is to spread stress among traces by delaying the upper and bottom trace. Underestimating the traces makes the PCB stronger by preventing them from lying over one another in a manner.

To alleviate tension, you must additionally channel traces perpendicular to the bending line. The number of hidden layers in one media may change from the amount in another while transitioning from rigidity to flexible and returned to stiff. By shifting the routing for adjoining levels, you could add stiffness to the flexible circuits using a traceroute.

Advantages of Rigid Flexible PCBs

Rigid Flexible circuits combine the benefits of fixed and flex circuitry. Customers and producers profit from them in the following areas.

Stable Mechanical:

Various forms of flexibility substrate were linked to one or even more stiff boards in Rigid Flexible systems, which provide both strength and elasticity for placement in difficult-to-reach locations.


High accuracy, reproducibility, and package layout flexibility are all advantages of the devices.

Availability of Connections:

These circuit boards' increased resilience and polarities provide safe and secure interconnections with other electronic systems.

Resists Harsh Atmosphere:

During the implementation of electrical services, heavy electrical parts are subject to stress and vibrations. When connecting electrical components with Rigid Flexible layouts, meanwhile, you won't have to bother about these concerns because the circuits are designed to handle high temperatures, heating, radioactivity, shocks, and severe environments.

Interested in knowing more about the Rigid Flexible PCBs, just write us now at sales@efpcb.com