Patent ID: 7491569
Filing Date: 2009-02-17
Classification: H03H

Abstract:
1. A method for manufacturing a bottom electrode in a piezoelectric device, the method comprising: (a) providing a substrate; (b) providing a layer structure on the substrate, the layer structure comprising a conductive material and a top protective layer; (c) applying a planarization layer on the protective layer and on the substrate; (d) exposing a portion of the protective layer by removing a portion of the planarization layer above the portion of the protective layer; (e) removing additional portions of the planarization layer such that the protective layer and the planarization layer form a first planar surface; and (f) removing the protective layer of the layer structure and a lateral corresponding portion of the planarization layer such that the planarization layer and the layer structure absent the protective layer form a second planar surface.