Patent ID: 7089638
Filing Date: 2006-08-15
Classification: H04R,Y10T

Abstract:
1. A method for fabricating a micromachined piezoelectric microspeaker comprising the steps of: forming a compressive film on a wafer; forming a bottom electrode on a predetermined part of the compressive film of the front side of the wafer; forming a piezoelectric film on the bottom electrode and on the compressive film of the front side of the wafer; forming a bottom insulator film on the piezoelectric film; forming a top electrode on a predetermined part of the bottom insulator where the top electrode is located over some part of the bottom electrode; forming a top insulator film on the top electrode and on the bottom insulator film; forming contact pads for the bottom electrode and top electrode at an outside part of each electrode; and removing a predetermined part of the wafer which is located between wafer parts located under the each contact pad.