Piezoelectric ultrasonic transducer with acoustic matching plate
US4680499A · kind A · utility
131Cited by
5References
5Claims
0Family size
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Key dates
| Filing date | Apr 9, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Apr 9, 2006 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/02
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A monolithic array ultrasonic transducer has a plurality of transducer elements formed thereon by isolating metallized areas on a piezoelectric plate without cutting the piezoelectric plate apart for each transducer element, and an acoustic matching layer having a longitudinal wave velocity within .+-.25% of a longitudinal wave velocity of the piezoelectric plate and a thickness equal to one half of that of the piezoelectric plate. The acoustic matching layer suppresses the radiation to an object of a partial wave in a direction of 60.degree. to a normal line to the plane of the piezoelectric plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.