发明名称 |
Piezeoelectric transducer having protuberances for transmitting acoustic energy and method of making the same |
摘要 |
A method of forming an ultrasound transducer having thermoformed protuberances comprises providing a substrate having a plurality of perforations of a given dimension. The perforations or apertures are formed in the substrate and operate to determine the resonance frequency associated with the transducer. A film of polymeric material capable of showing piezoelectric properties when strained in its plane and electrically biassed by a field applied in a direction normal to its faces, is then laminated onto the substrate. The film is heated to a given temperature and a pressure differential is applied between the top and bottom surfaces of the film for a sufficient time to form protuberances in the film through the apertures in the substrate. The film is then cooled to a given ambient temperature while maintaining a pressure differential between the top and bottom surfaces of the film for a sufficient time until the ambient temperature is reached so as to cause the protuberances to maintain a substantially permanent curvature.
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申请公布号 |
US6504289(B2) |
申请公布日期 |
2003.01.07 |
申请号 |
US20010954811 |
申请日期 |
2001.09.17 |
申请人 |
MEASUREMENT SPECIALTIES, INC. |
发明人 |
TODA MINORU;PARK KYUNG-TAE;SWAN JEFFREY D. |
分类号 |
B06B1/06;H01L41/45;H02N2/00;(IPC1-7):H01L41/08 |
主分类号 |
B06B1/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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