What are Membrane Switches?
- Membrane switches are a type of human-machine interface characterized by being constructed from several layers of plastic films or other flexible materials. These films are printed or laminated with conductive inks. They function by temporarily closing or opening a circuit.
- Membrane switches are extensively used in a variety of applications may it be domestic, commercial, or industrial. They are preferred because of their compact profile, simple construction, reliability, resistance to harmful elements, and low cost.
- The main parts of a membrane switch are an overlay containing the graphic elements; a circuit that includes the conductive tracks, metal domes, circuit tail, and terminals; and a spacer that maintains a break between the switch contacts.
- Aside from its electrical performance and characteristics, common features of membrane switches are UV hard coats, selective textures, clear or optically filtered display windows, indicator lighting, backlighting, precision cutting, and embossing.