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公开(公告)号:US07462973B2
公开(公告)日:2008-12-09
申请号:US10954662
申请日:2004-10-01
申请人: Hirotada Wachi , Toshifumi Tanaka , Tohru Takezaki , Satoshi Ichikawa , Tsuyoshi Oura , Koichi Wada , Satoshi Orito
发明人: Hirotada Wachi , Toshifumi Tanaka , Tohru Takezaki , Satoshi Ichikawa , Tsuyoshi Oura , Koichi Wada , Satoshi Orito
IPC分类号: H01L41/047
CPC分类号: H03H9/6493 , H03H9/0042 , H03H9/02779 , H03H9/1452
摘要: A surface acoustic wave device includes a piezoelectric substrate, at least one interdigital transducer (IDT) provided on the piezoelectric substrate, and a shield electrode provided on the piezoelectric substrate. The IDT has a first pattern on an edge that faces the shield electrode. The shield electrode has a second pattern on an edge so as to be evenly spaced apart from the first pattern.
摘要翻译: 表面声波装置包括压电基板,设置在压电基板上的至少一个叉指式换能器(IDT)和设置在压电基板上的屏蔽电极。 IDT在面向屏蔽电极的边缘上具有第一图案。 屏蔽电极在边缘上具有与第一图案均匀间隔开的第二图案。
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公开(公告)号:US07154360B2
公开(公告)日:2006-12-26
申请号:US10950975
申请日:2004-09-28
申请人: Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
发明人: Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
IPC分类号: H03H9/00 , H03H9/13 , H01L41/047
CPC分类号: H03H9/6426 , H03H9/02779 , H03H9/02992 , H03H9/1452 , H03H9/6479 , H03H9/6489
摘要: A filter includes a piezoelectric substrate, and interdigital transducers (IDTs) that are formed on the piezoelectric substrate. At least one of the IDTs has a main electrode finger pattern that is weighted. The IDT having the main electrode finger pattern also has a sub electrode finger pattern that is connected in parallel to the main electrode finger pattern, and generates a surface acoustic wave that cancels a surface acoustic wave caused by leakage electric fields generated in the main electrode finger pattern.
摘要翻译: 滤波器包括形成在压电基片上的压电基片和叉指式换能器(IDT)。 IDT中的至少一个具有加权的主电极手指图案。 具有主电极指形图案的IDT也具有与主电极指形图案并联连接的副电极指形图案,并且产生抵消由主电极指中产生的漏电电场引起的表面声波的表面声波 模式。
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公开(公告)号:US20050093660A1
公开(公告)日:2005-05-05
申请号:US10950975
申请日:2004-09-28
申请人: Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
发明人: Koichi Wada , Satoshi Ichikawa , Hirotada Wachi , Tohru Takezaki , Tsuyoshi Oura , Toshifumi Tanaka , Satoshi Orito
CPC分类号: H03H9/6426 , H03H9/02779 , H03H9/02992 , H03H9/1452 , H03H9/6479 , H03H9/6489
摘要: A filter includes a piezoelectric substrate, and interdigital transducers (IDTs) that are formed on the piezoelectric substrate. At least one of the IDTs has a main electrode finger pattern that is weighted. The IDT having the main electrode finger pattern also has a sub electrode finger pattern that is connected in parallel to the main electrode finger pattern, and generates a surface acoustic wave that cancels a surface acoustic wave caused by leakage electric fields generated in the main electrode finger pattern.
摘要翻译: 滤波器包括形成在压电基板上的压电基板和叉指式换能器(IDT)。 IDT中的至少一个具有加权的主电极手指图案。 具有主电极指形图案的IDT也具有与主电极指形图案并联连接的副电极指形图案,并且产生抵消由主电极指中产生的漏电电场引起的表面声波的表面声波 模式。
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公开(公告)号:US20050093395A1
公开(公告)日:2005-05-05
申请号:US10954662
申请日:2004-10-01
申请人: Hirotada Wachi , Toshifumi Tanaka , Tohru Takezaki , Satoshi Ichikawa , Tsuyoshi Oura , Koichi Wada , Satoshi Orito
发明人: Hirotada Wachi , Toshifumi Tanaka , Tohru Takezaki , Satoshi Ichikawa , Tsuyoshi Oura , Koichi Wada , Satoshi Orito
CPC分类号: H03H9/6493 , H03H9/0042 , H03H9/02779 , H03H9/1452
摘要: A surface acoustic wave device includes a piezoelectric substrate, at least one interdigital transducer (IDT) provided on the piezoelectric substrate, and a shield electrode provided on the piezoelectric substrate. The IDT has a first pattern on an edge that faces the shield electrode. The shield electrode has a second pattern on an edge so as to be evenly spaced apart from the first pattern.
摘要翻译: 表面声波装置包括压电基板,设置在压电基板上的至少一个叉指式换能器(IDT)和设置在压电基板上的屏蔽电极。 IDT在面向屏蔽电极的边缘上具有第一图案。 屏蔽电极在边缘上具有与第一图案均匀间隔开的第二图案。
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