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A focusing transducer based on a 9-μm thick PVDF foil was fabricated and tested for performance. The transducer operates in the frequency range of 20–160 MHz. For operation at 78 MHz in water, a lateral resolution of 27.5 μm and a vertical resolution of 35 μm have been observed. Acoustic images of a transistor have been obtained with the focusing PVDF transducer.
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Smolorz et al. (1996) studied this question.
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