Yi Yi (SYN) - A professional manufacturer of membrane keyboard switches, flexible printed circuits and flexible aluminum heaters.

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45 Years Membrane Switch & Flexible Printed Circuit Manufacturer | YI YI

Based in Taiwan, Yi Yi Enterprise Co., Ltd., since 1974, is a membrane switch & flexible printed circuit manufacturer. Every OEM or ODM finished membrane switch & flexible printed circuit is fully assessed before delivery, and all of our materials and components are RoHS compliant.

Specialized in manufacturing membrane switch with super-abrasive finishing, as well as PCB board, graphic overlay, EL panel and circuit board, all materials and components are suitable for use in computers, instruments, electronics and electrical goods. FPC bending test, FPC auto drilling, FPC e-test, FPC SMT, CNC laser cutting, color scanner, SMT for membrane switch and printed circuit supply. Export 70% worldwide in US and Europe and the rest 30% in Taiwan.

YI YI has been offering customers high-quality membrane switch, EL panel & flexible printed circuit, both with advanced technology and 25 years of experience, YI YI ensures each customer's demands are met.

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  • Mat surface Graphic Overlay
    Mat surface Graphic Overlay
    Graphic Overlay 01

    YIYI provides overlays with anti-scratch, UV and abrasion resistance materials and a variety of adhesives, protective films and surface treatments. We utilize silk screened to print gradient color, multicolor and monochrome. Overlays can protect LED, LCD and touch screens or can be attached to PCB or any equipment.


  • Various types of embossing
    Various types of embossing
    Graphic Overlay 02

    We provide variety of materials such as Autotex , PET…etc , overlay surface has matt and glory treatment.


  • Frame embossing buttons
    Frame embossing buttons
    Graphic Overlay 03

    The basic material is PET(Polyester) , matt surface treantment ,two colors silk screen printing ,embossing button for better tactile feeling. Customer can attach this graphic overylay on the machines or devices.


  • Anti scratch and UV resistance graphic overlay
    Anti scratch and UV resistance graphic overlay
    Graphic Overlay 04

    Anti scratch and UV resistance surface, eight colors silk screen printing with two color windows clear treatment, 3M468 adhesive on the back side ,


  • Medical machine graphic overlay
    Medical machine graphic overlay
    Graphic Overlay 05

    YIYI provides overlays with anti-scratch, UV and abrasion resistance materials and a variety of adhesives, protective films and surface treatments. We utilize silk screen to print gradient color, multicolor and monochrome. Overlay can protect LED, LCD and touch screens or can be attached to PCB or any equipment.


  • Multi color graphic overlay
    Multi color graphic overlay
    Graphic Overlay 06

    We provide several type of embossing, such as, flat embossing, frame embossing, round embossing. The life time of butoons are around 500 thousand times, it depends on the design.


  • Custom Graphic Overlay
    Custom Graphic Overlay
    Graphic Overlay 07

    We can do gradient color, multicolor and monochrome. We also provide a variety of materials, such as PC and PET, 3M adhesive ….They all come with matt and glory surface.


  • FPC assembled graphic overlay
    FPC assembled graphic overlay
    Flexible Printed Circuit 0224

    Our FPC products can be single side, double side, multilayer, and with SMT (surface-mount technology) to meet your particular needs. An FPC can be bent and folded, improving the efficiency of the configuration and being able to last for a long period of time, having a temperature tolerance of 180 - 200°C.



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