Patent ID: 8549916

Claim:
An angular velocity sensor comprising: a substrate; a pair of vibrators; a beam portion coupling the pair of vibrators with each other and coupling each of the pair of vibrators to the substrate to enable the pair of vibrators to be movable in a first direction and a second direction that are perpendicular to each other; a driving portion configured to vibrate the pair of vibrators in opposite phases in the first direction, the driving portion including a first driving electrode disposed on each of the pair of vibrators and a second driving electrode disposed on the substrate, the first driving electrode and the second driving electrode located opposite to each other in the second direction; a detecting portion configured to detect displacement of the pair of vibrators in the second direction as a change in capacitance, the displacement of the pair of vibrators in the second direction being caused by Coriolis force generated in the pair of vibrators due to vibration of the pair of vibrators and angular velocity around a third direction that is perpendicular to the first direction and the second direction, the detecting portion including a first detecting electrode disposed on each of the pair of vibrators and a second detecting electrode disposed on the substrate, the first detecting electrode and the second detecting electrode located opposite to each other in the second direction; and a restricting portion configured to restrict displacement of each of the pair of vibrators in the second direction based on the change in capacitance, the restricting portion including a first restricting electrode disposed on each of the pair of vibrators and a second restricting electrode disposed on the substrate, the first restricting electrode and the second restricting electrode located opposite to each other in the second direction, wherein the first driving electrode, the second driving electrode, the first detecting electrode, the second detecting electrode, the first restricting electrode, and the second restricting electrode have a same thickness in the third direction, the first detecting electrode includes a first opposing portion located opposite to the second detecting electrode, the second detecting electrode includes a second opposing portion located opposite to the first detecting electrode, and the first opposing portion and the second opposing portion have a same width in the second direction, and the first restricting electrode is located at an electrode interval from the second restricting electrode in the second direction, and the electrode interval is twice the width of each of the first opposing portion and the second opposing portion.