Ultrasonic probe
US4101795A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 1977 |
| Grant date | Jul 18, 1978 |
| Priority date | — |
| Expiry date | Jun 17, 1997 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K11/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An ultrasonic probe particularly suitable for ultrasonic diagnostic equipments of the electronic scanning type is made up of a multiplicity of piezoelectric transducer elements, each in the shape of a rectangular plate with electrode films coated on both sides, arranged in a row at intervals and an acoustic impedance matching layer placed on the row of the transducer elements. The width-to-thickness ratio of each piezoelectric plate takes a value not greater than 0.8 and preferably between 0.4 and 0.7 so that the plate can vibrate in width expansion mode. It is highly preferable that the impedance matching layer has a laminated structure given by two layers which are different in acoustic impedance of the respective materials and individually have definite thicknesses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.