 Membrane switches can be applied to metal panels, PCB’s, or rigid plastics. There are many options to consider when designing a membrane switch.
Non-Tactile or Tactile: Non-tactile membrane switches can be designed with a wide range of actuation forces. The actuation force is determined by the circuit
spacer thickness. Tactile membrane switches include a metal or polydome to achieve the desired tactile response. Using different sizes of metal or polydomes will vary
this actuation force.
Domes: Using different sizes of metal or polydomes will vary the actuation force. Metal domes come in a large variety of shapes and sizes with actuation forces
between 180 to 700 grams. Different actuation forces can be achieved by changing the diameter and height of the polydome to meet your requirements.
Upper & Lower Circuits: It is essential to choose a material that will out-live your application requirements; polycarbonate offers more flexibility in regard to design
but polyester is more durable. Circuits are printed with conductive silver ink and UV dielectric.
Spacer: Various thicknesses of 3M double-sided adhesives are available for the spacer which separates the upper circuit from the lower circuit.
Adhesive: There are numerous differences in adhesives. Selecting the proper adhesive for a membrane switch application requires consideration
of environment, surface, appearance, and other performance requirements.
LED’s: LED’s can be embedded on the switch or can be their own layer.
Termination: Can vary from male to female pins, solder tabs, or have housings applied to them.
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