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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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公开(公告)号:US20050168302A1
公开(公告)日:2005-08-04
申请号:US10989099
申请日:2004-11-16
申请人: Satoshi Orito , Tsuyoshi Oura , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Toshifumi Tanaka , Koichi Wada
发明人: Satoshi Orito , Tsuyoshi Oura , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Toshifumi Tanaka , Koichi Wada
CPC分类号: H03H9/02858 , H03H9/02881 , H03H9/02992 , H03H9/1452 , H03H9/6489
摘要: A surface acoustic wave (SAW) device includes a piezoelectric substrate, a first and a second interdigital transducers (IDT) provided thereon. The second IDT has a side that is substantially aligned with a corresponding side of the first IDT, and another side of the second IDT is arranged so that the second IDT may adjust a leaked wave caused resulting from by a power-flow angle of the piezoelectric substrate.
摘要翻译: 表面声波(SAW)装置包括压电基板,设置在其上的第一和第二叉指换能器(IDT)。 第二IDT具有与第一IDT的相应侧基本上对准的一侧,并且第二IDT的另一侧被布置成使得第二IDT可以调节由压电元件的功率流动角度引起的泄漏波 基质。
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公开(公告)号:US07221074B2
公开(公告)日:2007-05-22
申请号:US10989549
申请日:2004-11-17
申请人: Satoshi Orito , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Tsuyoshi Oura , Toshifumi Tanaka , Koichi Wada
发明人: Satoshi Orito , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Tsuyoshi Oura , Toshifumi Tanaka , Koichi Wada
IPC分类号: H01L41/08
CPC分类号: H03H9/6426 , H03H9/02779 , H03H9/14517 , H03H9/1455
摘要: A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in parallel. The second IDT includes a normalized electrode pattern. The frequency characteristic of the multiple tracks is asymmetric to a center frequency of the SAW filter, substantially flat in a passband when those of the multiple tracks are overlapped, or complementary in the passband. Thus, it is possible to provide the surface acoustic wave device having a high damping property.
摘要翻译: 表面声波装置包括压电基片,设置在压电基片上的第一和第二叉指式换能器(IDT)。 第一IDT包括并行连接的具有不同频率特性的多个轨迹。 第二IDT包括归一化电极图案。 多个磁道的频率特性与SAW滤波器的中心频率不对称,当多个磁道的频率在通带中重叠或互补时,通带中的基本平坦。 因此,可以提供具有高阻尼特性的表面声波装置。
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公开(公告)号:US07372347B2
公开(公告)日:2008-05-13
申请号:US10989099
申请日:2004-11-16
申请人: Satoshi Orito , Tsuyoshi Oura , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Toshifumi Tanaka , Koichi Wada
发明人: Satoshi Orito , Tsuyoshi Oura , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Toshifumi Tanaka , Koichi Wada
CPC分类号: H03H9/02858 , H03H9/02881 , H03H9/02992 , H03H9/1452 , H03H9/6489
摘要: A surface acoustic wave (SAW) device includes a piezoelectric substrate, a first and a second interdigital transducers (IDT) provided thereon. The second IDT has a side that is substantially aligned with a corresponding side of the first IDT, and another side of the second IDT is arranged so that the second IDT may adjust a leaked wave caused resulting from by a power-flow angle of the piezoelectric substrate.
摘要翻译: 表面声波(SAW)装置包括压电基板,设置在其上的第一和第二叉指换能器(IDT)。 第二IDT具有与第一IDT的相应侧基本上对准的一侧,并且第二IDT的另一侧被布置成使得第二IDT可以调节由压电元件的功率流动角度引起的泄漏波 基质。
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公开(公告)号:US20050121998A1
公开(公告)日:2005-06-09
申请号:US10989549
申请日:2004-11-17
申请人: Satoshi Orito , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Tsuyoshi Oura , Toshifumi Tanaka , Koichi Wada
发明人: Satoshi Orito , Toru Takezaki , Satoshi Ichikawa , Hirotada Wachi , Tsuyoshi Oura , Toshifumi Tanaka , Koichi Wada
CPC分类号: H03H9/6426 , H03H9/02779 , H03H9/14517 , H03H9/1455
摘要: A surface acoustic wave device includes a piezoelectric substrate, a first and a second interdigital transducers (IDTs) provided on the piezoelectric substrate. The first IDT includes multiple tracks having different frequency characteristics that are connected in parallel. The second IDT includes a normalized electrode pattern. The frequency characteristic of the multiple tracks is asymmetric to a center frequency of the SAW filter, substantially flat in a passband when those of the multiple tracks are overlapped, or complementary in the passband. Thus, it is possible to provide the surface acoustic wave device having a high damping property.
摘要翻译: 表面声波装置包括压电基片,设置在压电基片上的第一和第二叉指式换能器(IDT)。 第一IDT包括并行连接的具有不同频率特性的多个轨迹。 第二IDT包括归一化电极图案。 多个磁道的频率特性与SAW滤波器的中心频率不对称,当多个磁道的频率在通带中重叠或互补时,通带中的基本平坦。 因此,可以提供具有高阻尼特性的表面声波装置。
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