[특허]Ultrasonic transducer and method for using same

Ultrasonic transducer and method for using same 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	A61B-008/00 H01L-041/08
출원번호	US-0303638 (1994-09-09)
발명자 / 주소	Sleva Michael Z. (Atlanta GA) Hunt William D. (Decatur GA) Connuck David M. (Augusta GA) Briggs Ronald D. (Duluth GA)
출원인 / 주소	Georgia Tech Research Corp. (Atlanta GA 02) Medical College of Georgia Research Institute (Augusta GA 02)
인용정보	피인용 횟수 : 139 인용 특허 : 0

초록 ▼

An improved ultrasonic transducer fabricated on a silicon base has a piezoelectric layer of polyvinylidene fluoride-trfluroethylene copolymer. The piezoelectric layer is sandwiched between two conductive electrodes, all of which are supported on a dielectric layer on top of the silicon base. At least one of the electrodes forms a Fresnel zone plate to focus the ultrasonic signals from the transducers. To improve the performance of the transducer, the silicon base behind the active area is removed, leaving the dielectric layer as a membrane to support the electrodes and the piezoelectric layer. The resulting void in the silicon base is filled with an acoustically matched backing, such as an epoxy, to enhance the wideband performance of the transducer. The transducer is especially suited for characterizing anatomical structures or features requiring very high resolution.

대표청구항 ▼

A wide bandwidth ultrasonic transducer capable of both transmitting and receiving signals, comprising: a semiconductor base having a first layer which is heavily doped, a second layer which is lightly doped, and a void formed therein; a dielectric layer disposed on said first layer of said semiconductor base and spanning said void in said semiconductor base such that said dielectric layer has a first surface in contact with said first layer of said semiconductor base; a first conductive electrode disposed on a second surface of said dielectric layer and having a first surface in contact with said second surface of said dielectric layer, said conducting electrode having a second surface opposite said first surface of said first conductive layer; a piezoelectric film disposed on said second surface of said first conductive electrode layer and having a first surface in contact with said second surface of said first conductive electrode, said piezoelectric film having a second surface opposite said first surface; a second conductive electrode disposed on said second surface of said piezoelectric film and having a first surface in contact with said second surface of said piezoelectric film, said second conductive layer having a second surface opposite said first surface; a Fresnel zone plate pattern in at least one of said first conductive electrode and said second conductive electrode for focusing ultrasound waves emitting from said transducer; and backing means disposed in said void, said backing means having an acoustic impedance substantially matched to said piezoelectric layer.

이 특허를 인용한 특허 (139)

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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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저장형식	Text(ASCII format) Excel format PIAS분석(.xls)
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Ultrasonic transducer and method for using same 원문보기

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