Patent ID: 7152480

Claim:
A differential pressure detection type pressure sensor comprising: a casing having a concavity disposed on one side of the casing; a pressure detection element disposed on a bottom of the concavity of the casing; a through hole disposed in the casing; and first and second protection members, wherein the pressure detection element has two sides, one of which faces the bottom of the concavity, and the other one of which faces an opening of the concavity, the pressure detection element is capable of detecting pressure on the basis of differential pressure between a pressure applied to the bottom of the concavity and another pressure applied to the opening of the concavity, the through hole includes two openings, one of which is disposed on the bottom of the concavity so that the one side of the pressure detection element connects the through hole, and the other one of which is disposed on a part of the casing, the part being disposed on the one side of the casing and separated from the concavity, the through hole further includes a bent portion disposed in the middle of the through hole, the first protection member is disposed in the concavity for covering the other side of the pressure detection element facing the opening of the concavity, the second protection member is disposed in the through hole for filling in the through hole from the one opening to the other opening, the first protection member has a height of a surface facing the opening of the concavity, the second protection member has a height of a surface in the other opening of the through hole, and the height of the first protection member and the height of the second protection member are disposed on a same plane.