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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  • 4 Layers Flexible Printed Circuit
    4 Layers Flexible Printed Circuit
    Flexible Printed Circuit 0212

    Our FPC products can be single sided, double sided, 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.


  • Flexible Printed Circuit with Stiffener
    Flexible Printed Circuit with Stiffener
    Flexible Printed Circuit 0213

    The material of stiffener could be polyimide or polyester. Our FPC products can be single sided, double sided, 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.


  • SMT Flexible Printed Circuit
    SMT Flexible Printed Circuit
    Flexible Printed Circuit 0214

    Double sided FPC. Assembled with components. Our FPC products can be single sided, double sided, 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.


  • FPC assembled componets
    FPC assembled componets
    Flexible Printed Circuit 0215

    Flexible Printed Circuit with light guide film. Our FPC products can be single sided, double sided, 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.


  • ESD Shielding Flexible Printed Circuit
    ESD Shielding Flexible Printed Circuit
    Flexible Printed Circuit 0216

    Double Sided FPC with ESD Shielding Layer. ESD shield can prevent the electrostatic disturbance. Our FPC products can be single sided, double sided, 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.


  • FPC with Metal Dome
    FPC with Metal Dome
    Flexible Printed Circuit 0217

    Double sided FPC. Assembled with metal dome or SMT any components. 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.


  • 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.


  • Membrane Switch with Flexible Printed Circuit
    Membrane Switch with Flexible Printed Circuit
    Flexible Printed Circuit 0225

    Membrane Switch with Double sided FPC. 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


  • Controlling device Silicone Rubber Keypad
    Controlling device Silicone Rubber Keypad
    Silicone Rubber Keypad 0302

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Single button Silicone Rubber Keypad
    Single button Silicone Rubber Keypad
    Silicone Rubber Keypad 0304

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Poly button Silicone Rubber Keypad
    Poly button Silicone Rubber Keypad
    Silicone Rubber Keypad 0305

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Multipurpose Silicone Keypad
    Multipurpose Silicone Keypad
    Silicone Rubber Keypad 0308

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Automobile Silicone  buttons
    Automobile Silicone buttons
    Silicone Rubber Keypad 0309

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Plastic Rubber keypad
    Plastic Rubber keypad
    Silicone Rubber Keypad 0310

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Facilities Translucent Rubber Keypad
    Facilities Translucent Rubber Keypad
    Silicone Rubber Keypad 0311

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Multicolor Rubber Keypad
    Multicolor Rubber Keypad
    Silicone Rubber Keypad 0312

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.


  • Rubber Keypad combine with PCB
    Rubber Keypad combine with PCB
    Silicone Rubber Keypad 0313

    The technology uses the compression molding properties of silicone rubber to create angled webbing around a switch center. On depression of the switch the webbing uniformly deforms to produce a tactile response. When pressure is removed from the switch the webbing returns to its neutral position with positive feedback. In order to make an electronic switch a carbon or gold pill is placed on the base of the switch center which contacts onto a printed circuit board when the web has been deformed. It is possible to vary the tactile response and travel of a key by changing the webbing design and / or the shore hardness of the silicone base material. Unusual key shapes can easily be accommodated as can key travel up to 3mm. Tactile forces can be as high as 500g depending on key size and shape.The snap ratio of a keypad determines the tactile feel experienced by the user. The recommended snap ratio for designers to maintain is 40% - 60%; if dropped below 40% the keys will lose tactile feel but have an increased life. Loss of tactile feel means the user will not receive a "click" feedback during actuation.


  • Equipment PCB
    Equipment PCB
    Printed Circuit Board 0501

    PCBs can be single-sided (one copper layer), double-sided (two copper layers on both sides of one substrate layer), or multi-layer (outer and inner layers of copper, alternating with layers of substrate). Multi-layer PCBs allow for much higher component density, because circuit traces on the inner layers would otherwise take up surface space between components. The rise in popularity of multilayer PCBs with more than two, and especially with more than four, copper planes was concurrent with the adoption of surface mount technology.


  • PCB assembled FPC
    PCB assembled FPC
    Printed Circuit Board 0502

    A printed circuit board (PCB) mechanically supports and electrically connects electronic components or electrical components using conductive tracks, pads and other features etched from one or more sheet layers of copper laminated onto and/or between sheet layers of a non-conductive substrate. Components are generally soldered onto the PCB to both electrically connect and mechanically fasten them to it.


  • Industry use Printed Circuit Board
    Industry use Printed Circuit Board
    Printed Circuit Board 0503

    The first PCBs used through-hole technology, mounting electronic components by leads inserted through holes on one side of the board and soldered onto copper traces on the other side. Boards may be single-sided, with an unplated component side, or more compact double-sided boards, with components soldered on both sides. Horizontal installation of through-hole parts with two axial leads (such as resistors, capacitors, and diodes) is done by bending the leads 90 degrees in the same direction, inserting the part in the board (often bending leads located on the back of the board in opposite directions to improve the part's mechanical strength), soldering the leads, and trimming off the ends. Leads may be soldered either manually or by a wave soldering machine.


  • PCB combine with silver printed circuit
    PCB combine with silver printed circuit
    Printed Circuit Board 0504

    Alternatives to PCBs include wire wrap and point-to-point construction, both once popular but now rarely used. PCBs require additional design effort to lay out the circuit, but manufacturing and assembly can be automated. Specialized CAD software is available to do much of the work of layout. Mass-producing circuits with PCBs is cheaper and faster than with other wiring methods, as components are mounted and wired in one operation. Large numbers of PCBs can be fabricated at the same time, and the layout only has to be done once. PCBs can also be made manually in small quantities, with reduced benefits.


  • PCB assembled membrane switch
    PCB assembled membrane switch
    Printed Circuit Board 0505

    Membrane switch circuit layer with metal dome,Metal dome assembled underneath to make good tactile while Pushing the button


  • Mulitlayer Printed Circuit Board
    Mulitlayer Printed Circuit Board
    Printed Circuit Board 0506

    We can do Gerber file layout for customers based on samples. Electrical testing modes can be selected using test tooling or a flying-probe. By using a flying-probe to test circuits, we can not only test open-short but also circuit resistance.


  • Laser machine FPC with mulitlayer PCB
    Laser machine FPC with mulitlayer PCB
    Printed Circuit Board 0507

    We can use SMT and DIP to assemble all kinds of components, including metal dome. This makes it easier to design the board. PCB’s can be used in industrial, medical, and military equipment.



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