PCB Type - With a double sided printed circuit board as the base substrate for the membrane a higher density switch layout can be achieved than might be possible for a flexible type. The board thickness can be specified from a variety of standards commensurate with area to provide a suitably rigid panel. Threaded studs can be specified for mounting the panel itself or for mounting sub-assemblies, for example a display. Termination is via 0.64mm square pin surface mount headers.