Patent ID: 9726690
Date: 2017-08-08
CPC Classifications: G01P,H01L

Claim:
1. An angular acceleration sensor comprising: a planar surface; a fixed portion; a weight supported by the fixed portion; a beam extending in an extension direction along the planar surface and connected to the fixed portion and the weight; and a detection element disposed in the beam and detecting stress due to deflection of the beam along the planar surface; wherein a dimension of the beam in a width direction, which is a direction parallel or substantially parallel to the planar surface and perpendicular or substantially perpendicular to an extension direction, is larger than a dimension, in the width direction, of a connection portion at which the beam is connected to the fixed portion; the detection element is disposed in a portion of the beam other than edge portions of the beam in the extension direction; the portion of the beam includes the dimension in the width direction that is larger than the dimension of the connection portion in the width direction; the beam includes a width-direction protrusion protruding in the width direction; and a position of the detection element in the extension direction is displaced from that of the width-direction protrusion.