Patent ID: 7622846
Filing Date: 2009-11-24
Classification: H03H,Y10T

Abstract:
1. A resonator, comprising: a support structure; a first electrode located adjacent to a first surface of said support structure; a piezoelectric layer located adjacent to said first electrode and said first surface of said support structure; and a second electrode located adjacent to said piezoelectric layer on a side of said piezoelectric layer opposite to and in electrical isolation from said first electrode, said first electrode, said piezoelectric layer and said second electrode form a membrane structure, wherein said support structure includes a cavity that extends from a second surface of said support structure, through the support structure and to a surface of said first electrode closest to said support structure such that at least part of said membrane structure is over said cavity, wherein said cavity has walls, said walls forming an angle relative to said second surface of said support structure of 80° to 100°, and wherein said first electrode extends from a surface of said piezoelectric layer adjacent to said first surface of said support structure, across at least part of a wall of said cavity and onto said second surface of said support structure.