A membrane keyboard is a self-contained printed keyboard. Basically, it is a wafer-thin, three layer sandwich. On top is a non-glare clear polycarbonate film with the graphics and conductive pads printed under the surface. The middle layer is a polyester film which acts as a spacer with cut outs for the switch areas. On the bottom there is either another polycarbonate film with the switch contact and interconnection etched into it. Contact is made by manually pressing the top layer against the bottom layer