A deformographic membrane display system in which a semiconductor substrate, for example silicon, has an insulating layer such as SiO.sub.2 formed thereon with an array of holes formed in the insulating layer. Alternatively, the insulating layer may be omitted, with the holes being formed in the substrate....http://www.google.com.au/patents/US4087810?utm_source=gb-gplus-sharePatent US4087810 - Membrane deformographic display, and method of making
