公开(公告)号：US07194793B2

公开(公告)日：2007-03-27

申请号：US10844940

申请日：2004-05-13

申请人： Michio Kadota ,  Yasunori Takakuwa ,  Seigo Hayashi ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Yasunori Takakuwa ,  Seigo Hayashi ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H04R31/00

CPC分类号： H03H9/6483 ,  H03H9/02669 ,  H03H9/14552 ,  H03H9/6436 ,  H03H9/6463 ,  Y10T29/42 ,  Y10T29/49004 ,  Y10T29/49005 ,  Y10T29/49011 ,  Y10T29/4908 ,  Y10T29/49128 ,  Y10T29/4913

摘要： A method for adjusting a frequency characteristic of an edge reflection type surface acoustic wave device includes the step of obtaining a frequency characteristic of an edge reflection type surface acoustic wave device having a piezoelectric substrate. The edge reflection type surface acoustic wave device has a pair of edges of the piezoelectric substrate which define a predetermined distance therebetween. The piezoelectric substrate is cut at a position which defines a distance that is shorter than the predetermined distance when a final frequency characteristic of the edge reflection type surface acoustic wave device is to be higher than the obtained frequency characteristic. The piezoelectric substrate is cut at a position which defines a distance that is longer than the predetermined distance when a final frequency characteristic of the edge reflection type surface acoustic wave device is to be lower than the obtained frequency characteristic.

摘要翻译： 用于调整边缘反射型声表面波装置的频率特性的方法包括获得具有压电基片的边缘反射型声表面波装置的频率特性的步骤。 边缘反射型弹性表面波器件具有在其间限定预定距离的压电基片的一对边缘。 当边缘反射型弹性表面波器件的最终频率特性要比所获得的频率特性高时，将压电基片切割成限定比预定距离短的距离的位置。 当边缘反射型弹性表面波器件的最终频率特性要低于所获得的频率特性时，压电基片被切割在限定比预定距离长的距离的位置处。

公开(公告)号：US06781282B1

公开(公告)日：2004-08-24

申请号：US10407577

申请日：2003-04-04

申请人： Mamoru Ikeura ,  Hideya Horiuchi ,  Junya Ago ,  Michio Kadota

发明人： Mamoru Ikeura ,  Hideya Horiuchi ,  Junya Ago ,  Michio Kadota

IPC分类号： H03H925

CPC分类号： H03H9/02669 ,  H03H9/0033 ,  H03H9/6426 ,  H03H9/6459

摘要： A longitudinally coupled resonator-type surface acoustic wave device includes interdigital transducers including a plurality of electrode fingers disposed along the propagation direction of a surface acoustic wave on a surface acoustic wave device. An electrically discontinuous portion is provided in a central portion, in the finger overlap direction, in adjacent electrode fingers in adjacent interdigital transducers, and at least one floating electrode is disposed in the finger overlap direction in the electrically discontinuous portion.

摘要翻译： 纵向耦合的谐振器型表面声波装置包括叉指换能器，包括沿表面声波装置的表面声波的传播方向设置的多个电极指。 在手指重叠方向的中央部分，在相邻的叉指式换能器中的相邻的电极指中设置电不连续部分，并且至少一个浮动电极以不连续部分的手指重叠方向设置。

公开(公告)号：US06531937B2

公开(公告)日：2003-03-11

申请号：US09788893

申请日：2001-02-20

申请人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H03H964

CPC分类号： H03H9/02669 ,  H03H9/14552 ,  H03H9/6436 ,  H03H9/6463 ,  H03H9/6483

摘要： An edge reflection type surface acoustic wave filter includes a piezoelectric substrate having two opposing edges and at least one interdigital transducer. The interdigital transducer includes split electrodes of paired electrode fingers arranged on the piezoelectric substrate such that a shear horizontal (SH-type) surface acoustic wave is excited on the piezoelectric substrate and is reflected between the two opposing edges. Each of the edges is preferably located at a distance of at least about &lgr;/2−5&lgr;/128 from a center of the paired equipotential electrode fingers, located at the respective outermost portions, in the surface acoustic wave propagation direction, of the interdigital transducer and less than about &lgr;/2 from the center of the paired equipotential electrode fingers, where &lgr; is a wavelength of the SH-type surface acoustic wave excited on the piezoelectric substrate.

摘要翻译： 边缘反射型表面声波滤波器包括具有两个相对边缘的压电基片和至少一个叉指式换能器。 叉指换能器包括布置在压电基片上的成对电极指的分裂电极，使得剪切水平（SH型）表面声波在压电基片上被激发并在两个相对的边缘之间被反射。 每个边缘优选地位于距成对等电位指的中心至少约lambd / 2-5lambd / 128的距离处，位于表面声波传播方向上的各个最外部的叉指换能器 并且从成对的等电位指的中心小于约lambd / 2，其中lamb是在压电基片上激发的SH型表面声波的波长。

公开(公告)号：US06335584B1

公开(公告)日：2002-01-01

申请号：US09503867

申请日：2000-02-14

申请人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H01L4104

CPC分类号： H03H9/02669 ,  H03H9/0057 ,  H03H9/14514

摘要： An edge reflection type surface acoustic wave device includes a surface acoustic wave substrate having an opposing pair of edges and at least one interdigital transducer located on the surface acoustic wave substrate. A Shear Horizontal type surface acoustic wave is generated by the interdigital transducer and reflected between the opposing pair of edges. The interdigital transducer is divided into a plurality of sub-IDT portions along a surface acoustic wave-propagating direction. Electrode fingers of the interdigital transducer which are closest to each other between adjacent sub-IDT portions are at the same potential so as not to be excited between the adjacent sub-IDT portions. In addition, when it is assumed that the widths of the outermost electrode fingers in the surface acoustic wave-propagating direction of the interdigital transducer are equal to the widths of the remaining electrode fingers before cutting of the substrate, the edges are arranged such that the edges are cut at a location inside of the center of the outermost electrode fingers in the surface acoustic wave-propagating direction such that a distance between the opposite edges of the substrate is not an integral multiple of &lgr;0/2.

摘要翻译： 边缘反射型声表面波装置包括具有相对边缘的声表面波基板和位于表面声波基板上的至少一个叉指换能器。 剪切水平型表面声波由叉指式换能器产生并在相对的一对边缘之间反射。 叉指式换能器沿表面声波传播方向分成多个子IDT部分。 在相邻的子IDT部分之间彼此最靠近的叉指式换能器的电极指状物处于相同的电位，以便在相邻的子IDT部分之间不被激励。 此外，当假设叉指式换能器的表面声波传播方向上的最外面的电极指的宽度等于切割基片之前的剩余电极指的宽度时，边缘被布置成使得 边缘在表面声波传播方向上在最外侧电极指的中心的位置处被切割，使得基板的相对边缘之间的距离不是lambd0 / 2的整数倍。

公开(公告)号：US06297713B1

公开(公告)日：2001-10-02

申请号：US09321507

申请日：1999-05-27

申请人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Junya Ago ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H03H964

CPC分类号： H03H9/6483 ,  H03H9/0038 ,  H03H9/0042 ,  H03H9/02669 ,  H03H9/14552 ,  H03H9/6436 ,  H03H9/6463

摘要： A surface acoustic wave device is constructed to operate using an SH type surface acoustic wave and so that the surface acoustic wave is reflected by two opposite edges of the device. The surface acoustic wave device includes a piezoelectric substrate having first and second main surfaces and the two edges arranged opposite to each other and which connect the first and second main surfaces, respectively, and an interdigital transducer having a pair of interdigital electrodes provided on the first main surface of the piezoelectric substrate and arranged so that the electrode fingers thereof are interdigitated with each other. The electrode fingers of the interdigital electrodes include a plurality of split electrodes, except for the electrode fingers located at the outermost sides in the surface acoustic wave propagation direction. The electrode fingers on the outermost sides have a width that is different from that of the split electrodes.

摘要翻译： 表面声波装置被构造成使用SH型表面声波进行操作，并且使声表面波被装置的两个相对的边缘反射。 表面声波装置包括具有第一和第二主表面的压电基片和彼此相对布置并且分别连接第一和第二主表面的两个边缘和具有设置在第一和第二主表面上的一对叉指电极的叉指式换能器 压电基板的主表面并且布置成使得其电极指相互交错。 叉指电极的电极指除了位于声表面波传播方向最外侧的电极指之外还包括多个分割电极。 最外侧的电极指具有与分割电极不同的宽度。

公开(公告)号：US06377139B1

公开(公告)日：2002-04-23

申请号：US09521829

申请日：2000-03-09

申请人： Hideya Horiuchi ,  Michio Kadota ,  Junya Ago ,  Takao Mukai

发明人： Hideya Horiuchi ,  Michio Kadota ,  Junya Ago ,  Takao Mukai

IPC分类号： H03H925

CPC分类号： H03H9/6436 ,  H03H9/02669 ,  H03H9/02677 ,  H03H9/6433 ,  H03H9/6463

摘要： An edge reflection type surface acoustic wave device utilizes a Shear Horizontal type surface acoustic wave and includes a surface acoustic wave substrate, and at least two interdigital transducers provided on one main surface of the surface acoustic wave substrate. First and second grooves are formed on the opposite ends in the surface acoustic wave propagation direction of the area where the interdigital transducer is provided. The first and second grooves extend from the one main surface of the surface acoustic wave substrate toward the other main surface thereof without reaching the other main surface. The grooves extend substantially perpendicularly to the surface acoustic wave propagation direction so as to define first and second edges for reflecting the surface acoustic wave. The first and second edges are defined by the inner sideively. walls of the first and second grooves, respectively.

摘要翻译： 边缘反射型声表面波装置利用剪切水平型弹性表面波，并且包括表面声波基板和设置在弹性表面波基板的一个主表面上的至少两个叉指式换能器。 第一和第二槽形成在设置叉指换能器的区域的表面声波传播方向的相对端。 第一和第二槽从声表面波衬底的一个主表面向另一个主表面延伸而不到达另一个主表面。 凹槽基本上垂直于声表面波传播方向延伸，以便限定用于反射表面声波的第一和第二边缘。 第一和第二边缘由内侧确定。 第一和第二槽的壁分别。

公开(公告)号：US06297712B1

公开(公告)日：2001-10-02

申请号：US09317071

申请日：1999-05-14

申请人： Michio Kadota ,  Haruo Morii ,  Kazuhiko Morozumi ,  Junya Ago ,  Hideya Horiuchi

发明人： Michio Kadota ,  Haruo Morii ,  Kazuhiko Morozumi ,  Junya Ago ,  Hideya Horiuchi

IPC分类号： H03H972

CPC分类号： H03H9/6433 ,  H03H9/02669 ,  H03H9/02779 ,  H03H9/02992 ,  H03H9/14538 ,  H03H9/6459 ,  H03H9/6469

摘要： A surface acoustic wave filter apparatus includes a plurality of stages of multi-mode filters defined by edge-reflection type surface acoustic wave devices and electrically connected in series with each other. The plurality of stages of multi-mode filters are provided on a common piezoelectric substrate and arranged in a direction which is substantially perpendicular to the propagation direction of surface acoustic waves. Ground electrodes are located between the stages of the plurality of stages of multi-mode filters.

摘要翻译： 表面声波滤波器装置包括由边缘反射型弹性表面波器件限定并且彼此串联电连接的多级多模式滤波器级。 多级滤波器的多级设置在公共压电基片上并且布置在基本上垂直于表面声波的传播方向的方向上。 接地电极位于多级过滤器的多级阶段之间。

公开(公告)号：US06879225B2

公开(公告)日：2005-04-12

申请号：US10610925

申请日：2003-07-01

申请人： Michio Kadota ,  Hideya Horiuchi ,  Takeshi Nakao ,  Yasuhiro Kuratani ,  Masakazu Mimura ,  Junya Ago

发明人： Michio Kadota ,  Hideya Horiuchi ,  Takeshi Nakao ,  Yasuhiro Kuratani ,  Masakazu Mimura ,  Junya Ago

IPC分类号： H03H9/145 ,  H03H3/10 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/15

CPC分类号： H03H9/6436 ,  H03H3/10 ,  H03H9/02559 ,  H03H9/02669 ,  H03H9/02834 ,  H03H9/02984 ,  H03H9/6433

摘要： A surface acoustic wave device includes a Y-cut, X-propagation LiTaO3 substrate, at least one interdigital transducer provided on the LiTaO3 substrate and made of Al or a metal containing Al as a major component, and an SiO2 film provided on the surface of the LiTaO3 substrate so as to cover the interdigital transducer, wherein the thickness Hs of the SiO2 film normalized by the wavelength λ of a surface acoustic wave and the cut angle θ of the LiTaO3 substrate are set to be in any one of the ranges represented by formulae (1) to (8): in the case of 0.00

摘要翻译： 表面声波装置包括Y切割的X传播LiTaO 3基板，设置在LiTaO 3基板上的由Al或含有Al作为主要成分的金属制成的至少一个叉指换能器，以及设置在 LiTaO 3衬底以覆盖叉指换能器，其中由表面声波的波长λ和LiTaO 3衬底的切割角度θ归一化的SiO 2膜的厚度Hs被设定为由 式（1）〜（8）：

公开(公告)号：US06784764B2

公开(公告)日：2004-08-31

申请号：US10218017

申请日：2002-08-14

申请人： Michio Kadota ,  Hideya Horiuchi ,  Junya Ago ,  Takeshi Nakao ,  Yasuhiro Kuratani

发明人： Michio Kadota ,  Hideya Horiuchi ,  Junya Ago ,  Takeshi Nakao ,  Yasuhiro Kuratani

IPC分类号： H03H900

CPC分类号： H03H9/02984 ,  H03H9/02669

摘要： An end-surface reflection type surface acoustic wave filter is capable of increasing an attenuation amount outside a pass band while insertion loss characteristics are not seriously deteriorated. The filter is a longitudinally coupled resonator type surface acoustic wave filter using an SH type surface acoustic wave, which has first and second grooves formed in a piezoelectric substrate at the top surface thereof so as to be substantially parallel to each other and spaced from each other by a predetermined distance. In addition, IDTs which are provided between the grooves for defining the longitudinally coupled resonator type surface acoustic wave filter, reflection end-surfaces disposed on side surfaces of the first and the second grooves at the IDT sides, and one of a resin-coating layer and a protective layer made of SiO2, are provided on the top surface of the piezoelectric substrate. The resin-coating layer is arranged to cover at least a region at which the IDTs are located and at least one of the first and the second grooves so as to intrude into one of them, and the protective layer is arranged so as to cover the IDTs.

摘要翻译： 端面反射型表面声波滤波器能够增加通带外的衰减量，而插入损耗特性不会严重恶化。 滤波器是使用SH型表面声波的纵向耦合的谐振器型表面声波滤波器，其具有在其顶表面上形成在压电基片中的第一和第二凹槽，以便彼此基本平行并彼此间隔开 预定距离。 另外，设置在用于限定纵向耦合的谐振器型声表面波滤波器的槽之间的IDT，设置在IDT侧的第一和第二槽的侧面的反射端面以及树脂被覆层 和由SiO 2制成的保护层设置在压电基板的顶表面上。 树脂涂层被设置成至少覆盖IDT所在的区域和第一和第二槽中的至少一个以侵入其中的一个，并且保护层被布置成覆盖 IDT。

公开(公告)号：US5781083A

公开(公告)日：1998-07-14

申请号：US613074

申请日：1996-03-08

申请人： Hideya Horiuchi ,  Michio Kadota ,  Junya Ago

发明人： Hideya Horiuchi ,  Michio Kadota ,  Junya Ago

IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/25 ,  H03H9/64 ,  H04N5/44 ,  H03H9/00

CPC分类号： H03H9/02669 ,  H03H9/1452

摘要： A free edge reflective-type surface wave resonator for reflecting SH-type surface waves between two confronting free edges of a piezoelectric substrate includes a piezoelectric substrate having two confronting free edges and an interdigital transducer having a plurality of electrode fingers which are weighted by a cross width weighting method or an electrode thinning method. The weighting of the electrode fingers is performed so that an attenuation pole of a main lobe of the weighted IDT is located outside of a frequency of an attenuation pole of a normal non-weighted IDT which has the same number of electrode finger pairs as the weighted IDT. The weighting of the electrodes is such that the main lobe of the weighted IDT and a plurality of resonance characteristics determined by the attenuation poles of the normal unweighted IDT are obtained.

摘要翻译： 用于在压电基板的两个相对自由边缘之间反射SH型表面波的自由边反射型表面波谐振器包括具有两个相对自由边缘的压电基片和具有多个电极指的叉指换能器，该多个电极指由十字 宽度加权法或电极稀化法。 执行电极指的加权，使得加权IDT的主瓣的衰减极点位于正常非加权IDT的衰减极点的频率之外，该正常非加权IDT具有与加权的相同数量的电极指对对的频率 IDT。 电极的加权使得获得加权IDT的主瓣和由正常未加权IDT的衰减极点确定的多个谐振特性。