Patent ID: 6951136
Filing Date: 2005-10-04
Classification: G01L,H01L

Abstract:
1. A semiconductor pressure sensor device, comprising: a semiconductor sensor substrate having one and other main surfaces facing and being in parallel with each other; and a support member on which said semiconductor sensor substrate is mounted, wherein said semiconductor sensor substrate comprises a thin part constituting a diaphragm; a thick part surrounding said thin part; a strain gage element formed on a surface of said diaphragm in a side of said one main surface, for detecting a pressure; and a first concave part formed by said thin part and said thick part, having an opening part in said other main surface, and whose bottom part corresponds to said thin part, wherein said support member comprises a second concave part, wherein said support member is fixed on said thick part of said semiconductor sensor substrate in a side of said other main surface so that an opening part of said second concave part faces with said opening part of said first concave part and has a positional relationship to be included in said opening part of said first concave part in a plane view.