Patent ID: 6495945
Filing Date: 2002-12-17
Classification: B81B,B81C,C04B,H01L

Abstract:
A piezoelectric/electrostrictive element comprising:a ceramic substrate having a thin diaphragm portion and a thick portion; a lower electrode formed on a surface of the ceramic substrate; an auxiliary electrode formed on the surface of the ceramic substrate at a location spaced apart from said lower electrode; an insulating bonding layer formed on the surface of the ceramic substrate between the lower electrode and the auxiliary electrode; a piezoelectric/electrostrictive layer formed on at least a portion of the lower electrode, at least a portion of the bonding layer and at least a portion of the auxiliary electrode; and an upper electrode formed on the piezoelectric/electrostrictive layer; wherein the bonding layer forms a completely bonded part comprising portions of the ceramic substrate, the lower electrode, the auxiliary electrode and the piezoelectric/electrostrictive layer.