| US 7,569,971 B2 | ||
| Compensation of resonators for substrate and transducer asymmetry | ||
| Jeffrey C Andle, Falmouth, Me. (US); and Bert W. A. Wall, Potsdam (Germany) | ||
| Assigned to Delaware Capital Formation, Inc., Wilmington, Del. (US) | ||
| Filed on Oct. 02, 2007, as Appl. No. 11/865,829. | ||
| Prior Publication US 2009/0085430 A1, Apr. 02, 2009 | ||
| Int. Cl. H01L 41/04 (2006.01) | ||
| U.S. Cl. 310—313D | 20 Claims |
| 1. An acoustic wave device comprising:
a substrate comprising at least a piezoelectric layer;
a first reflector disposed on said substrate, having a first reflector Bragg frequency;
a second reflector disposed on said substrate, having a second reflector Bragg frequency; and
at least one transducer disposed between said first and second reflectors wherein said at least one transducer has a plurality
of repeating cells, each cell having a center of transduction and a center of reflection, at least one of said cells having
an asymmetry between its center of transduction and its center of reflection, said first reflector Bragg frequency and said
second reflector Bragg frequency being unequal and providing an adjustment of a standing wave into alignment with said repeating
cells' centers of transduction.
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