Patent ID: 7436107

Claim:
An angular velocity sensor comprising: a tuning fork vibrator having two arms and a base to support the two arms; a drive unit formed on a main surface of each of the two arms in order to drive each of the two arms in an X-axis direction; and a detection unit formed on the main surface of each of the two arms in order to detect vibration of each of the two arms in a Z-axis direction based on an angular velocity applied around a Y-axis, wherein the detection unit is made up of a bottom electrode formed on the main surface of each of the two arms, a piezoelectric film formed on the bottom electrode, and a top electrode formed on the piezoelectric film; the main surface having the detection unit thereon and a tilted side surface adjacent to the main surface cross each other at an acute angle; and a center of at least the top electrode of the detection unit is shifted from a center of the main surface to a side opposite to the tilted side surface.