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Domes (including metal dome and polydome) provide users with good tactility. This kind of membrane switch has one circuit layer. When pressing the dome, it shorts contacts on the circuit layer. Usual actuation force of metal domes is from 6 oz to 11 oz. Stainless steel dome is very popular all over the world.

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Non-tactile membrane switches use an upper circuit layer to replace domes, which does not provide users with tactility. So, sounds or lights should be applied on the panel to remind users that the button is pressed down. When pressing buttons on non-tactile switches, air is extruded from vent, and the upper and bottom circuit layers are shorted. When releasing buttons, air comes back and isolates the 2 circuit layers.

Outstanding advantage of non-tactile switches is its longer lifecycle and good contact performance.

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We can provide EMI and RFI shielding with Printed Metal Grid Shielding or Aluminum Shielding method. These shieldings are printed onto a special layer or laminated onto your circuit providing protection against ESD or EMI. The ground needs to be connected with your switch cable or by a dedicated cable.

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To adapt device to dark condition, we can provide electroluminescent (EL) backlighting to your membrane switches. EL backlighting requires inverter for the power input. Backlighting materials often lower the tactile feedback of domed keys. To compensate it, we normally need to increase the actuation force by about 2 oz.

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Embedded SMT LED and resistor is very popular in membrane switch design, especially in US and Europe. We can integrate SMT LED and resistors in the circuit of membrane switch, which improves the integration of membrane switch and provides friendly operation interface