Patent ID: 9618412
Date: 2017-04-11
CPC Classifications: B81B,G01L

Claim:
1. A semiconductor physical quantity sensor comprising: a first base material; an electrode formed on the first base material; a diaphragm configured to bend in accordance with a physical quantity applied from the outside; a second base material fixed to the first base material and supporting the diaphragm such that the diaphragm is opposed to the electrode with a space in between; an insulator formed on a surface of the diaphragm, the surface being on the first base material side; a through-hole penetrating the second base material to detect a capacitance between the diaphragm and the electrode, and a wall portion to surround at least part of the through-hole and define the space and the through-hole, wherein the wall portion is formed in a gap between the insulator and the electrode facing each other in a thickness direction of the diaphragm.