OEM 3M Adhesive Membrane Switch Keypad, Flat Membrane Switch

• Components of a Membrane Switch
  Graphic Overlay

  Graphic overlays are a thin film with a printed layer that acts as the product’s top surface. They can be decorative or simple in design. You can emboss graphic overlays, or the graphic can help indicate switch locations.

  
  

• Keypads

  Keypads are a set of buttons arranged in a block that become the interface of products. Keypads offer a wide variety of options to achieve the desired user experience. Common keypad materials are:

  Compression-molded elastomer materials
  Hard keys mounted in a bezel
  A combination of hard key and elastomers

  
  

• Adhesive

  Pressure-sensitive adhesives are thin layers of tape that adhere domes to the circuit. Adhesives can help protect the switch from debris, provide a moisture barrier, or other environmental factors.

  
  

• Metal Domes

  Metal domes are normally-open contacts that, when pressed, complete the circuit. Metal domes, also known as tactile domes, create tactile feedback for the user and come in a wide variety of sizes, styles, and forces. Domes have life ratings of up to 10 million presses. Snaptron can produce custom domes with minimal lead times.

• Backlit metal dome
  Metal dome with a built-in actuator
• Dual-action metal dome
  

• Spacers/Retainers

  A retaining pocket can hold a dome in position without the need for an adhesive layer. A spacer layer provides space for the dome under the graphic overlay. It can also incorporate venting channels that allow air to move under the graphic overlay when pressing various switches. Spacers eliminate the need to vent each switch pocket through the circuit board.

  [tactile domes with spacer]
  Spacer layer with metal domes in the pockets
  

• Circuit

  The circuit can be single-sided, double-sided, or even flexible in some applications, also known as a flex circuit. Domes are positioned on the circuit pads, and when depressed, create contact closure.

  Metals domes are placed on top of the contact pads

  Metal domes are just one of the many components of a switch that together make a complex human-machine interface.

Applications:

• home appliances and device
• Security Protection systems with Cipher Code
• Various industry control keypad panel
• consumer electronics and 3C item
• Thrapy medical system and device
• Various automtic machine control keypad
• Telecommunication Equipment
• Medical Equipment
• Industrial Equipment
• Household Equipment
• Remote Controller
• Control system

Our Advantage:

• We Focus in membrane switch and related items.
• Strong R&D capability
• Stable in quality
• Competitive price
• Short Lead time for samples and Mass production
• Whole solution design available