An improved planar contact array switch having reduced susceptibility to electrostatic discharge includes a printed circuit board which carries at least one switch contact foil pair. Sandwiched between the circuit board and an insulative overlay is a dome-shaped disc which, when depressed, completes...http://www.google.fr/patents/US4456800?utm_source=gb-gplus-shareBrevet US4456800 - Planar contact array switch having improved ground path for dissipating electrostatic discharges
Planar contact array switch having improved ground path for dissipating ...
