Patent ID: 7197939

Claim:
A pressure sensor comprising: a semiconductor substrate having a diaphragm for detecting a pressure and a thick portion positioned around the diaphragm, the thick portion having a wall thickness thicker than that of the diaphragm; and a pedestal member having one surface bonded to the thick portion of the semiconductor substrate and the other surface opposite to the one surface, wherein: the pedestal member has a through hole through which pressure is introduced to the diaphragm, the through hole penetrating through from an opening of the other surface to the one surface of the pedestal member; the through hole has a hole diameter that becomes smaller from the one surface toward the other surface of the pedestal member; the pedestal member is a glass pedestal made of a glass material, the through hole being provided in the glass pedestal; and the hole diameter of the through hole on the one surface of the pedestal member is larger than the hole diameter of the through hole on the other surface of the pedestal member.