Patent ID: 9093634
Filing Date: 2015-07-28
Classification: H01L,H03B,H03H

Abstract:
1. A piezoelectric vibration element comprising: a piezoelectric substrate that, in plan view, is provided with (i) a first excitation portion, (ii) a second excitation portion that is thinner than the first excitation portion and is arranged at the periphery of the first excitation portion, and (iii) a level difference portion that extends in a thickness direction (a) at a peripheral portion that is arranged at the periphery of the first and second excitation portions and whose thickness is thinner than that of the second excitation portion, (b) between the first and second excitation portions, and (c) between the second excitation portion and the peripheral portion; excitation electrodes that, in plan view, extend from a main surface of the first excitation portion to a main surface of the peripheral portion; pads that are arranged in the peripheral portion; and drawn-out electrodes that electrically connect the excitation electrodes and the pads.