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What is a Rigid-Flex PCB

Rigid-Flex printed circuit boards are boards using a combination of flexible and rigid board technologies in an application. Most rigid flex boards consist of multiple layers of flexible circuit substrates attached to one or more rigid boards externally and/or internally, depending upon the design of the application. The flexible substrates are designed to be in a constant state of flex and are usually formed into the flexed curve during manufacturing or installation.


Rigid-Flex designs are more challenging than the design of a typical rigid board environment, as these boards are designed in a 3D space, which also offers greater spatial efficiency. By being able to design in three dimensions rigid flex designers can twist, fold and roll the flexible board substrates to achieve their desired shape for the final application's package.

Rigid-Flex PCBs Fabrication Applications

Rigid-Flex PCBs offer a wide array of applications, ranging from smart devices to cell phones and digital cameras. Increasingly, rigid-flex board fabrication has been used in medical devices such as pacemakers for their space and weight reduction capabilities. The same advantages for rigid-flex PCB usage can be applied to smart control systems.

In consumer products, rigid-flex doesn't just maximize space and weight but greatly improves reliability, eliminating many needs for solder joints and delicate, fragile wiring that are prone to connection issues. These are just some examples, but Rigid-Flex PCBs can be used to benefit nearly all advanced electrical applications including testing equipment, tools and automobiles.

Rigid-Flex PCBs Technology and Production Process

Whether producing a rigid flex prototype or production quantities requiring large scale Rigid-Flex PCBs fabrication and PCB assembly, the technology is well proven and reliable. The flex PCB portion is particularly good in overcoming space and weight issues with spatial degrees of freedom.

Careful consideration of Rigid-Flex solutions and a proper assessment of the available options at the early stages in the rigid-flex PCB design phase will return significant benefits. The Rigid-Flex PCBs fabricator must be involved early in the design process to ensure the design and fab portions are both in coordination and to account for final product variations.

The Rigid-Flex manufacturing phase is also more complex and time-consuming than rigid board fabrication. All the flexible components of the Rigid-Flex assembly have completely different handling, etching, and soldering processes than rigid FR4 boards.

Benefits of Rigid-Flex PCBs

  • Space requirements can be minimized by applying 3D

  • By removing the need for connectors and cables between the individual rigid parts, the board size and overall system weight can be reduced.

  • By maximizing space, there is often a lower count in parts.

  • Fewer solder joints assure higher connection reliability.

  • Handling during assembly is easier in comparison with flexible boards.

  • Simplified PCB assembly processes.

  • Integrated ZIF contacts provide simple modular interfaces to the system environment.

  • Test conditions are simplified. A complete test before installation becomes possible.

  • Logistical and assembly costs are significantly reduced with Rigid-Flex boards.

  • It is possible to increase the complexity of mechanical designs, which also improves the degree of freedom for optimized housing solutions.

Check PCBWay Rigid-Flex PCB manufacturing capabilities in the following table: 

Layers32 Layers
Min Track / Spacing0.075 mm / 0.075 mm
Min Hole Size / Pad Size0.10 mm / 0.35 mm
Rigid-Flex Thickness0.25 mm-6.0 mm
Max Copper Thickness4 oz
Max WPNL Size610 mm X 914 mm
Finish Copper(Flex Part)0.5-2 oz
Finish Copper(Rigid Part)1-4 oz
Max Aspect Ratio13:1
Surface Finish

ENIG、Electric gold、IM-Ag、Electric Ag、HASL、

HASL-LF、IM-Sn、Electric Sn、OSP、Caborn、 PtNI-Pd-AU

Drilling Accuracy+/-0.05 mm
PTH Diameter Tolerance+/-0.05 mm
Build time7-20 days
RFQ1-2 days

Flex and Rigid-Flex Overview(Our advantage)

Touch Pad Flex,Multi-Layer Flex for Docking Drive,Flex with Componentsimage.png  image.png

Rigid Flex with Very Good Flex to Install Applications Adhesiveless construction IPC-6013, Type 4


Multi-Layer Flex with Limited Flex to Install And Minimum Bend Radius - IPC-6013, Type 3


Single sided for Dynamic, Tight Bends and Flex to Install Applications IPC-6013, Type 1


Double-sided for Flex to Install Applications with Minimum Flexing IPC-6013, Type 2


Double-sided for Flex to Install Applications with Minimum Flexing IPC-6013, Type 2


Flex/Flexible PCBs and Rigid-flex PCBs Samples show >>

More information please check here:

PCB Flex-Rigid PCB Instant Quote

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