Composite ultrasonic transducers and methods for making same
US4683396A · kind A · utility
54Cited by
2References
19Claims
0Family size
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Key dates
| Filing date | Oct 17, 1984 |
| Grant date | Jul 28, 1987 |
| Priority date | — |
| Expiry date | Oct 17, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB06B1/0622
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A ultrasonic transducer using such a piezoelectric composite that a number of piezoelectric poles made of piezoelectric ceramics are arranged in a plate-like polymer matrix perpendicular to the plate surface. The volume ratio of the piezoelectric poles is set in a range of 0.15-0.75 and a spacing between every adjacent piezoelectric poles is set smaller than the thickness of the polymer plate, thereby resulting in a transducer which has higher sensitivity than the conventional one using a homogeneous piezoelectric ceramic plate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.