| US 7,579,753 B2 | ||
| Transducers with annular contacts | ||
| R. Shane Fazzio, Loveland, Colo. (US); Walter Dauksher, Fort Collins, Colo. (US); and Atul Goel, Fort Collins, Colo. (US) | ||
| Assigned to Avago Technologies Wireless IP (Singapore) Pte. Ltd., Singapore (Singapore) | ||
| Filed on Nov. 27, 2006, as Appl. No. 11/604,478. | ||
| Prior Publication US 2008/0122320 A1, May 29, 2008 | ||
| Int. Cl. H01L 41/08 (2006.01) | ||
| U.S. Cl. 310—324 [310/322; 310/366; 367/141; 381/173; 381/190] | 22 Claims |
| 1. A transducer structure, comprising:
an upper inner electrode;
an upper outer electrode;
a lower inner electrode;
a lower outer electrode;
a layer of piezoelectric material disposed between the upper electrodes and the lower electrodes;
an upper gap between the upper inner electrode and the upper outer electrode; and
a lower gap between the lower inner electrode and the lower outer electrode, wherein the upper gap and the lower gap are located
to substantially coincide with respective inflection points of the transducer structure during oscillation.
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