Patent ID: 6734600
Filing Date: 2004-05-11
Classification: H03H

Abstract:
A component for forming vertically standing waves of a wavelength &lgr;, comprising:a piezoelectric layer having a first main surface, a second main surface opposite said first main surface, and a thickness of substantially &lgr;/2 or an integral multiple of &lgr;/2; a first pair of electrodes including a first lower electrode and a first upper electrode, and a second pair of electrodes including a second lower electrode and a second upper electrode; said first upper electrode and said second upper electrode being formed on said first main surface of said piezoelectric layer, and said first lower electrode and said second lower electrode being formed on said second main surface of said piezoelectric layer; said first upper electrode, said second upper electrode, said first lower electrode, and said second lower electrode each being structured such that substructures of said first upper electrode and of said second upper electrode engage in one another and substructures of said first lower electrode and of said second lower electrode engage in one another, said substructures having non-constant dimensions varying about a mean value and being configured to suppress formation of lateral wave shape modes.