Patent ID: 7441317
Filing Date: 2008-10-28
Classification: H01L,Y10T

Abstract:
1. A method for manufacturing a piezoelectric/electrostrictive device including a ZrO 2 substrate, a Pt electrode layer adhering to a surface of the ZrO 2 substrate, and a piezoelectric/electrostrictive layer adhering to a surface of the Pt electrode layer, the method comprising the steps of: a first layer forming step of forming a first layer containing Pt on a ZrO a second layer forming step of forming a second layer containing a piezoelectric/electrostrictive material comprising a solid solution of bismuth sodium titanate and potassium niobate on the first layer; a firing step of heating the ZrO a cooling step of cooling the piezoelectric/electrostrictive device after the firing step; wherein the cooling step comprises a sub-step of holding the piezoelectric/electrostrictive device at a constant temperature that is lower than the firing temperature during the cooling step; and wherein the constant temperature of the cooling sub-step is within a range of temperatures at which high-temperature creep occurs in the Pt electrode layer to provide a step of deforming the Pt electrode layer by high-temperature creep during the cooling sub-step.