Method for making multi-layer ceramic acoustic transducer
US7156938B2 · kind B2 · utility
25Cited by
11References
23Claims
0Family size
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Key dates
| Filing date | Nov 11, 2003 |
| Grant date | Jan 2, 2007 |
| Priority date | — |
| Expiry date | Nov 23, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/1062
Abstract
Methods for preparing a multi-layer acoustic transducer with reduced total electrical impedance. The methods are based on the stacking of individual piezoelectric layers with metallized surfaces to form a plate in which the metal layers are electrically connected to form interdigitated electrodes. The total electrical impedance of a multi-layer stack comprised of piezoelectric layers connected in this manner is inversely related to the square of the number of layers in the stack. This provides for better matching of the acoustic stack impedance to that of the electrical cable and improved acoustic element sensitivity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.