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公开(公告)号:US4426595A
公开(公告)日:1984-01-17
申请号:US341683
申请日:1982-01-22
申请人: Kuninori Kawaura , Sumio Yamada , Noboru Wakatsuki , Masaaki Ono , Shigeo Tanji , Yoshiro Fujiwara , Masanobu Yanagisawa
发明人: Kuninori Kawaura , Sumio Yamada , Noboru Wakatsuki , Masaaki Ono , Shigeo Tanji , Yoshiro Fujiwara , Masanobu Yanagisawa
CPC分类号: H03H9/02842 , H03H9/02866
摘要: An acoustic surface wave device comprises a piezoelectric substrate (1), an input transducer (2), an output transducer (3) and acoustical absorbent layer patterns (5, 6) for absorbing undesired acoustic surface waves and bulk waves (S.sub.4, S.sub.5). Each of the acoustical absorbent layer patterns (5, 6) has zigzag-shaped or triangular shaped edges, i.e., a recess portion (R.sub.1, R.sub.3) and a protruding portion (R.sub.2, R.sub.4). The recess portion has a further recess portion (R.sub.1 ', R.sub.3 ') which is formed diagonally with respect to the propagation path of acoustic surface waves.
摘要翻译: 声表面波装置包括用于吸收不需要的声表面波和体波的压电基片(1),输入换能器(2),输出换能器(3)和吸声层图案(5,6) 。 每个吸声层图案(5,6)都具有锯齿状或三角形边缘,即凹部(R1,R3)和突出部分(R2,R4)。 凹部具有相对于声表面波的传播路径对角地形成的另一凹部(R1',R3')。