POLYESTER Membrane Keyboard

PCF-based keyboards are made of two or more layers of polyester film that have an electrically conductive circuit screen printed on them. These two layers are separated by a spacer that features air vents for flawless switch operation.
These keyboards come in tactile and non-tactile varieties, and they can be embossed or not. Built-in LEDS can be added to these keyboards either on the same layer or by adding a third layer. This keyboard can be mounted to a firm backing, such as an aluminum plate, using the glue that is provided on the back.
Electroluminescent bulbs or LEDS can be used to illuminate these keyboards.