Patent ID: 8087296

Claim:
An angular velocity sensor comprising: a substrate having an upper surface, the upper surface having a first recess provided therein; an electronic component mounted in the first recess; and a first vibration element mounted onto the upper surface of the substrate and connected electrically to the electronic component, the first vibration element having a portion located directly above the electronic component, wherein the upper surface of the substrate has a second recess provided therein, the second recess (i) being located beneath the first vibration element, (ii) being shallower than the first recess, and (iii) communicating with the first recess, wherein the upper surface of the substrate has a first joint portion joined directly to the first vibration element, wherein the second recess is located between the first joint portion and the first recess, wherein the second recess has a bottom, and wherein the first vibration element directly faces the bottom of the second recess.