Patent ID: 6066812
Filing Date: 2000-05-23
Classification: H01H

Abstract:
A layered structure for a keyswitch comprising:a lower flex circuit layer having a first electrical circuit and a plurality of first contacts formed on an upper surface thereof;an upper flex circuit layer overlaying said lower flex circuit layer and having a second electrical circuit and a plurality of second contacts formed on a lower surface thereof in respective correspondence with said plurality of first contacts of said lower flex circuit layer;a spacer layer disposed between said lower flex circuit layer and said upper flex circuit layer, said spacer layer having a plurality of through holes formed therein and located in correspondence with said plurality of first and second contacts,; and,a multiplicity of projecting flanges disposed between said lower flex circuit layer and said spacer layer, each of said through holes of said spacer layer having a respective plurality of said multiplicity of projecting flanges being angularly spaced around said through hole and radially extending therefrom to define a plurality of contiguous air passages surrounding said through hole, each said air passage extending between a respective pair of said angularly spaced projecting flanges and in open communication with said through hole.