摘要 |
PCT No. PCT/GB96/00368 Sec. 371 Date Nov. 3, 1997 Sec. 102(e) Date Nov. 3, 1997 PCT Filed Feb. 16, 1996 PCT Pub. No. WO96/25244 PCT Pub. Date Aug. 22, 1996An ultrasound detector comprises an array of electrically isolated electrodes (2) embedded in a non-conducting matrix (4) of acoustically engineered material to form a composite body (5). A piezoelectric film (8) is bonded to the body (5) by an insulating adhesive (12), providing an ohmic/capacitive coupling between the electrodes (2) and respective areas of the film (8). The signal generated between the individual electrodes (2) and an electrode layer (18) overlaying the film (8) is processed to provide information on the sound pressure distribution of an ultrasound wave. The use of a non-conductive connection between the film (8) and electrodes (2) greatly facilitates manufacture but provides good performance.
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