A small and highly sensitive capacitance type pressure sensor is obtained by filling an alkali halide material (2) such as KBr into a through-hole, forming a conductive thin film (4) on the surface, and dissolving and removing the alkali halide material (2). An insulating plate (1) disposed with a through-hole in the thickness direction is filled with a molten alkali halide material (2) such as KBr. After forming a conductive thin film (4) on the surface of the alkali halide material (2) filled into the through-hole and the vicinity thereof, the alkali halide material (2) is dissolved by water and removed. In this way, a diaphragm is made of the through-hole and the conductive thin film (4). A curve of the diaphragm caused by a pressure difference between the both faces of the conductive thin film (4) is detected as a capacitance change between the conductive thin film (4) and the electrode layer (6). <IMAGE> <IMAGE>
申请公布号
DE69412769(T2)
申请公布日期
1999.01.14
申请号
DE1994612769T
申请日期
1994.12.02
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD., KADOMA, OSAKA, JP