The membrane keypad and membrane switch can be described as an electric keypad that turns an electrical circuit on or off. It is different when compared to mechanical keypad that is typically constructed of plastic and copper; a membrane keypad is an electronic circuit that is printed on Polyethylene Terephthalate (PET) as well as Indium Tin Oxide (ITO). The ink used for screen printing is typically silver / copper or graphite-filled and thus a conductor. Membrane keypads are interfaces for user equipment … Continue reading “What is Membrane Keypad?”