Patent ID: 7328490
Filing Date: 2008-02-12
Classification: B41J,H01L,Y10T

Abstract:
1. A method for manufacturing a piezoelectric element comprising the steps of: forming a Ti film on a layered bottom electrode; forming piezoelectric material layers in a plurality of cycles of layer formation to produce a PZT piezoelectric thin film predominantly oriented in a 100 plane; and forming a top electrode on the PZT piezoelectric thin film, wherein, when the piezoelectric material layers are formed, an annealing temperature of an initial cycle of layer formation: (1) is set higher than an annealing temperature of subsequent cycles of layer formation and, (2) is set higher than a temperature at which the layered bottom electrode undergoes interdiffusion, and wherein the annealing temperature of the subsequent cycles of layer formation is set below the temperature at which the layered bottom electrode undergoes interdiffusion.