Patent ID: 6842015
Filing Date: 2005-01-11
Classification: G01L,G06F,H01H,H03K

Abstract:
1. A capacitance type sensor comprising: a substrate for determining an XY plane in a defined XYZ three-dimensional coordinate system; a detective member being opposite to said substrate; a conductive member disposed between said substrate and said detective member, said conductive member being displaceable in a Z-axis direction as said detective member is displaced in a Z-axis direction; a reference electrode formed on said substrate and electrically connected with said conductive member, said reference electrode being grounded or kept at a fixed potential; a first electrode formed on said substrate; a second electrode formed on said substrate to constitute a first capacitance element with said conductive member; and a third electrode disposed at a distance from said first electrode so that said third electrode can be brought into contact with said first electrode as said conductive member is displaced, wherein: