Patent ID: 8570110
Filing Date: 2013-10-29
Classification: H03H

Abstract:
1. A surface mount type crystal unit comprising: a framed crystal plate in which an oscillating part having a first excitation electrode and a second excitation electrode on opposite principal surfaces thereof is surrounded by a frame, and said oscillating part and said frame are connected by a connecting part; and a base and a cover bonded to opposite principal surfaces of said frame to hermetically seal said oscillating part, wherein a first metal film is formed in one area of two areas formed by dividing the principal surface of said frame facing said base at two positions around a circumferential direction of said frame, and a second metal film is formed in the other area, said first metal film is electrically connected to said first excitation electrode, said second metal film is electrically connected to said second excitation electrode, said frame and said base are bonded to each other by a sealing material formed on surfaces of said first metal film and said second metal film, and a gap area between said first metal film and said second metal film is filled with glass, thereby hermetically sealing said oscillating part.