Patent ID: 7196452
Filing Date: 2007-03-27
Classification: H03H,Y10T

Abstract:
1. A wafer having a plurality of acoustic wave devices formed thereon and exhibiting common operational characteristics, each of said acoustical wave devices manufactured according to a method comprising: (a) forming a ground electrode on the wafer which is intended to be placed on top of a semiconductor substrate; (b) forming a piezoelectric thin film on top of the ground electrode, wherein the piezoelectric thin film varies in at least one characteristic across the wafer; and (c) forming at least one upper electrode on top of the piezoelectric thin film, wherein at least the ground electrode, the piezoelectric thin film and the at least one upper electrode form components, as a result of steps (a)–(c), in each of the plurality of acoustical wave devices, and wherein at least one component in some of the plurality of acoustical wave devices is modified in its operational characteristic to compensate for the variation in the at least one characteristic of the piezoelectric thin film and is based on the location of the at least one acoustical wave device on the wafer.