Membrane switches are used  in consumer and industrial
                  applications requiring a input pad device. Membrane switches
                  are low cost, considered reliable, and are available in custom
                  or off-the-shelf configurations. By fabrication several layers
                  of polyester (PET) or plastics and onto a  printable
                  conductive electronic circuits and a graphic overlay, membrane
                  switches offer product developers a flat keypad type interface
                  system as opposed to classic mechanical type keypads. Membrane
                  switch assemblies are great space and weight savings
                  alternative to mechanical keypads.
                  Manufacturers and suppliers of membrane switches fabricate
                  assemblies using flexible plastic membrane material , domed or
                  flat mechanical type switch devices and tactile and
                  non-tactile type switches.  Membrane switches are used within
                  industry and products for numerical keypads, graphical
                  keypads, keypad control panels, and membrane switch overlays. 
                  Below, is a typical membrane switch assembly.