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Rigid Flex Printed Circuit Boards

Flexible PCB has been widely used in the market and has become an indispensable product in the electronics industry. It can adapt to various applications of flexible PCBs, such as wearable devices, artificial organs, medical devices, RFID modules, etc. Rigid flexible PCB is a substitute for rigid PCB, made of PCB material but with bending characteristics. The combination of rigid and flexible PCB is mainly used for mobile phones and wearable products. Both semi flexible and rigid flexible PCBs provide sturdy designs with additional flexibility to move or shake product components.

Rigid flexible PCBs can be bent, folded, or rounded, and then integrated into various products. They provide convenience, flexibility, and mobility for portable devices. They include expansion cards and batteries on laptops or desktop computers. A semi flexible PCB can be bent or bent, but it is not as flexible as a rigid flexible combination board. They are also an effective portable device solution because they do not require rigid connections in areas with high pedestrian traffic, as they can bend without breaking or separating. This blog post will delve into various applications of rigid flexible PCB and semi flexible PCB design.

    product application

    Common applications of rigid flexible combination PCB and semi flexible PCB design

    Semi flexible PCBs also have other applications in the medical field.  For example:
    Injection needle tip protection circuit board (ETC)
    Medical device temperature control circuit board
    Portable blood pressure monitor display circuit board

    product parameters


    AREX´s technical specification

    Number of layers

    1 – 12 layers, with 1 – 2 conductive layers in bending area.

    Technology highlights

    The process uses controlled depth routing of the FR-4 to achieve a flexible / bending section within a traditionally rigid FR-4. Only suitable for static operations – bends typically just for installation. A lower cost solution for some very specific “flex-to-fit”applications.

    Bending performance

    50 x bend cycles of 0° – 90° – 0°

    Bend features

    5mm radius / max bending angle 90°


    Specialized FR-4 for static flex applications

    Copper weights (finished)


    Minimum track and gap

    0.075mm / 0.075mm

    PCB thickness

    1.00mm – 2.00mm

    PCB thickness in flex section

    0.25mm ± 0.05mm

    Maxmimum dimensions

    538mm x 610mm

    Surface finishes available

    HASL (SnPb), LF HASL (SnNiCu), OSP, ENIG, Immersion tin, Immersion silver, Electrolytic gold, Gold fingers

    Minimum mechanical drill


    Minimum laser drill

    0.10mm standard, 0.075mm advanced