Membrane keyboards

Unlike the keyboards with mechanical contact modules, membrane keyboards use cheaper technology to identify keystrokes. To do this, you have to use three membranes, folded in the form of a sandwich: two of them, the top and the bottom, are coated with silver-plated contact pads and conductors, and the third is the separating one, located between the two metallized and has holes in the sites. Molded rubber bands act as key springs.