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：US06873226B2

公开(公告)日：2005-03-29

申请号：US10066717

申请日：2002-02-06

申请人： Takao Mukai ,  Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Takao Mukai ,  Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H03H9/02 ,  H03H9/145 ,  H03H9/64 ,  H03H9/72

CPC分类号： H03H9/02669 ,  H03H9/14552 ,  H03H9/6433 ,  H03H9/6436

摘要： An edge reflection surface acoustic wave filter includes IDTs disposed on a top surface of a piezoelectric substrate, and surface acoustic waves of the Shear Horizontal type are reflected between opposite edges. At least one outermost electrode finger in the direction of propagation of surface acoustic waves on the side of at least one of the edges is removed. Accordingly, desired filter characteristics can readily be achieved without causing variations in filter characteristics, spurious components at frequencies lower than the passband are minimized, and selectivity is greatly improved.

摘要翻译： 边缘反射表面声波滤波器包括设置在压电基板的顶表面上的IDT，剪切水平型表面声波在相对边缘之间被反射。 移除在至少一个边缘侧的表面声波的传播方向上的至少一个最外电极指。 因此，可以容易地实现所期望的滤波器特性，而不会引起滤波器特性的变化，频率低于通带的杂散分量被最小化，并且极大地提高了选择性。

公开(公告)号：US6150900A

公开(公告)日：2000-11-21

申请号：US309859

申请日：1999-05-11

申请人： Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H03H9/145 ,  H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H03H9/72 ,  H04B1/38 ,  H04B1/3822

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

摘要： A surface acoustic wave filter includes edge-reflection type surface acoustic wave resonators arranged as series and parallel arm resonators and connected in a ladder configuration. The edge-reflection type surface acoustic wave resonators defining the series and parallel arm resonators are disposed on a single common substrate and arranged so as to be substantially parallel to the end surface of the edge-reflection type surface acoustic wave resonators.

摘要翻译： 表面声波滤波器包括被布置为串联和并联臂谐振器并且以梯形结构连接的边缘反射型表面声波谐振器。 限定串联和并联臂谐振器的边缘反射型表面声波谐振器设置在单个公共基板上并且被布置成基本上平行于边缘反射型表面声波谐振器的端面。

公开(公告)号：US06670739B2

公开(公告)日：2003-12-30

申请号：US10052507

申请日：2002-01-23

申请人： Hideya Horiuchi ,  Mamoru Ikeura ,  Michio Kadota

发明人： Hideya Horiuchi ,  Mamoru Ikeura ,  Michio Kadota

IPC分类号： H01L4100

CPC分类号： H03H9/02669 ,  H03H9/02921 ,  H03H9/6436 ,  H03H9/6459

摘要： A SAW apparatus includes a plurality of IDTs disposed on a piezoelectric substrate, and an edge-reflection-type SAW device in which surface acoustic waves are reflected by the edge surfaces of the piezoelectric substrate. The SAW device is housed in a package. On the top of a first main surface of the piezoelectric substrate, first and second pyroelectric charge cancellation electrodes are disposed in the vicinity of the edges defined by the main surface and the side surfaces. The first and second pyroelectric charge cancellation electrodes are electrically connected to the electrodes on the package which are electrically connected to each other within the package, respectively. Therefore, the adverse effects of pyroelectric charge which is generated due to a rapid change in temperature is minimized.

摘要翻译： SAW器件包括设置在压电基片上的多个IDT，以及表面声波被压电基片的边缘表​​面反射的边缘反射型SAW器件。 SAW器件容纳在封装中。 在压电基板的第一主表面的顶部，第一和第二热释电电极取消电极设置在由主表面和侧表面限定的边缘附近。 第一和第二热释电电极消除电极分别电连接到封装中彼此电连接的封装中的电极。 因此，由于快速温度变化而产生的热电荷的不利影响被最小化。

公开(公告)号：US06127769A

公开(公告)日：2000-10-03

申请号：US103322

申请日：1998-06-23

申请人： Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

发明人： Michio Kadota ,  Hideya Horiuchi ,  Mamoru Ikeura

IPC分类号： H03H9/02 ,  H03H9/25 ,  H03H9/64 ,  H01L41/08

CPC分类号： H03H9/6436 ,  H03H9/02669 ,  H03H9/02716 ,  H03H9/02771 ,  H03H9/02795 ,  H03H9/6446 ,  H03H9/6469 ,  H03H9/6483

摘要： A surface acoustic wave device includes a surface acoustic wave substrate having first and second end surfaces, and a surface acoustic wave element provided on the surface acoustic wave substrate and operating using an SH-type surface acoustic wave. The surface acoustic wave element includes an interdigital transducer having a plurality of electrode fingers and a reflector having a plurality of electrode fingers. One of a pair of outermost electrode fingers is flush with one of the first and second end surfaces of the surface acoustic wave substrate, and the reflector is located at a side where the other of the pair of outermost electrode fingers is positioned, so that a SH-type surface acoustic wave excited by the IDT is confined between the reflector and the one of the first and second end surfaces.

摘要翻译： 表面声波装置包括具有第一和第二端面的表面声波基板和设置在表面声波基板上并使用SH型表面声波进行操作的表面声波元件。 表面声波元件包括具有多个电极指的交叉指型换能器和具有多个电极指的反射器。 一对最外面的电极指中的一个与声表面波基板的第一和第二端面之一齐平，并且反射器位于一对最外电极指的另一侧所在的一侧，使得 由IDT激发的SH型表面声波被限制在反射器与第一和第二端面之一之间。