The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 09, 2005
Filed:
May. 12, 2003
John D. Larson, Iii, Palo Alto, CA (US);
Yury Oshmyansky, Camarillo, CA (US);
John D. Larson, III, Palo Alto, CA (US);
Yury Oshmyansky, Camarillo, CA (US);
Agilent Technologies, Inc., Palo Alto, CA (US);
Abstract
Acoustic resonator devices having multiple resonant frequencies and methods of making the same are described. In one aspect, an acoustic resonator device includes an acoustic resonant structure that includes first and second electrodes and first and second piezoelectric layers. The first and second electrodes abut opposite sides of a resonant volume free of any interposing electrodes. The first and second piezoelectric layers are disposed for acoustic vibrations in the resonant volume and have different respective acoustical resonance characteristics and respective piezoelectric axes oriented in different directions. The acoustic resonant structure has resonant electric responses at first and second resonant frequencies respectively determined at least in part by the acoustical resonance characteristics of the first and second piezoelectric layers.