Patent ID: 9645027
Date: 2017-05-09
CPC Classifications: G01C,G01L

Claim:
1. A physical quantity sensor comprising: a substrate that has a recess that is open toward one side of the substrate; a diaphragm that has a bottom of the recess as part of the diaphragm and undergoes bending deformation under pressure; a sensor device that is disposed in the diaphragm; a ceiling portion that faces the diaphragm via a cavity; and a sidewall portion that is disposed between the substrate and the ceiling portion, forms, along with the substrate and the ceiling portion, the cavity, and has an inner wall surface that faces the cavity, wherein at least one of the ceiling portion and the sidewall portion contains a metal, and in a plan view of the substrate, a circumferential edge of the bottom is closer to the center of the diaphragm than a substrate-side end of the inner wall surface.