Patent ID: 9130148
Filing Date: 2015-09-08
Classification: H01L,H03H

Abstract:
1. A piezoelectric resonator plate comprising: at least a pair of excitation electrodes; and at least a pair of extraction electrodes that are respectively extracted from the pair of excitation electrodes to electrically and mechanically bond the pair of excitation electrodes to an external electrode, wherein the pair of extraction electrodes each include a distal end portion, the distal end portion including a connecting electrode extracted to a vicinity of one end portion on one principal surface of the piezoelectric resonator plate, the connecting electrodes each include a top surface where a first metal film to be bonded to the external electrode is formed, the first metal film has a larger surface roughness and a smaller area compared with the respective connecting electrodes, the first metal film including a to surface with two or more protruding portions, the protruding portions are formed with cross-sections in curvature shapes, and