Patent ID: 6232702
Filing Date: 2001-05-15
Classification: G10K,H01L

Abstract:
An electroactive device comprising:an electroactive ceramic annular substrate having a pair of opposed planar annular surfaces, a hollowed interior region and a thickness aspect;electrodes coupled to said ceramic annular substrate;a first cap having a concave shape that extends into said hollowed interior region and a rim portion bounding said hollowed interior region and joined to a first one of said planar surfaces;a second cap having a concave shape that extends into said hollowed interior region and a rim portion bounding said hollowed interior region and joined to a second one of said planar surfaces; andmeans for measuring a potential developed on said conductive electrodes to enable a field change in said ceramic substrate to be sensed, said field change caused by flexure of said ceramic substrate as a result of a pressure applied to said first and second metal caps.