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Surface acoustic wave device having a small acoustic velocity distribution and method of producing the same
Surface acoustic wave device having a small acoustic velocity distribution and method of producing the same
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机译:声速分布小的表面声波装置及其制造方法
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摘要
A surface acoustic wave device includes a piezoelectric substrate, and at least one interdigital transducer disposed thereon which is made of a metal or an alloy that is heavier than Al. The acoustic velocity distribution of surface acoustic waves in the extending direction of electrode fingers of the at least one interdigital transducer is not greater than about 276 ppm, thereby effectively suppressing considerable ripples, which are noticeably found in the group delay time characteristic in particular, within the bandpass area.
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