Patent ID: 8164399

Claim:
A thin film piezoelectric vibrator comprising a resonance part including at least a pair of vibration units, a connection part that connects the pair of vibration units, a vibration node at a center of each of the pair of vibration units, and a supporter that supports the resonance part, wherein the pair of vibration units are symmetrical with respect to a plane, and the supporter is configured to hold the resonance part at each of the vibration nodes, and is connected to an insulating substrate at each of the vibration nodes of the resonance part; and wherein the vibration units each comprise a multilayer structure including: a piezoelectric thin film, a first metal electrode film, and a second metal electrode film, wherein at least a part of the piezoelectric thin film is configured to be interposed between the first and second metal electrodes, and the piezoelectric thin film is polarized in a direction perpendicular to a film surface, and vibrates in a radial extension mode.