Patent ID: 7745979
Filing Date: 2010-06-29
Classification: H03H

Abstract:
1. A piezoelectric device, comprising: a piezoelectric element having, on a surface of a piezoelectric body, an exciting electrode and a drawing electrode that is electrically coupled to the exciting electrode and draws an electrode to an external section, and a substrate bonded to the drawing electrode with a metallic brazing material, wherein: the piezoelectric element contains a connecting electrode connecting the exciting electrode with the drawing electrode; and the connecting electrode and/or the exciting electrode contains an underlying layer provided on the surface of the piezoelectric body and a surface layer section provided on a surface of this underlying layer, wherein: the underlying layer having a connected portion of the exciting electrode and the drawing electrode, is provided using the metallic brazing material and a metallic material of adverse wettability; and a portion of the surface layer section is removed in a manner that the connected portion of the exciting electrode and the drawing electrode provided by the surface layer, are separated.