Patent ID: 7536916

Claim:
A pressure sensor comprising: a case including therein a hollow portion; a pressure-receiving diaphragm disposed at one end portion of said case, one surface thereof serving a pressure-receiving surface receiving a pressure under measurement, said pressure-receiving diaphragm being distorted upon being applied with said pressure at said pressure-receiving surface thereof; a pressure transmitting member disposed in said hollow portion so as to be in contact, at one end thereof, with the other surface of said pressure-receiving diaphragm opposite to said pressure-receiving surface; a stem member having a shape of a tube with a bottom and disposed in said hollow portion so as to be in contact with the other end of said pressure transmitting member at an inner surface of said bottom serving as a distortion section being distorted upon receiving said pressure at said inner surface through said other end of said pressure transmitting member; and a sensor chip disposed in said hollow portion on a side of an outer surface of said bottom of said stem member; said case being constituted by said stem member, a metal pipe having one end to which said pressure-receiving diaphragm is fixed, and the other end to which an opening end of said stem member opposite to said distortion section is inserted, and a housing having a shape of a hollow cylinder with an opening end to which said other end of said metal pipe is inserted together with said stem member, wherein a heat radiating member is provided between an outer periphery of said stem member and an inner periphery of said housing so as to be in contact with said stem member and said housing.