Patent ID: 7854049
Filing Date: 2010-12-21
Classification: H03H,Y10T

Abstract:
1. A method for manufacturing a piezoelectric thin film device that includes a single or a plurality of film bulk acoustic resonators, comprising: a production process for producing a member that includes a piezoelectric substrate, wherein the production process comprises a depression formation process for forming a depression that makes a thickness of an excitation region of the piezoelectric substrate smaller than a thickness of a non-excitation region in a prescribed region of the piezoelectric substrate; a bonding process for bonding said member to a support, wherein the formed depression separates the excitation region of the piezoelectric substrate from the support in a prescribed region of the support, where the prescribed region of the support is opposed to the excitation region of the piezoelectric substrate; and a removal process for performing removal processing on the piezoelectric substrate while keeping said member bonded to the support, to obtain a piezoelectric thin film.