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    • 23. 发明授权
    • Piezoelectric thin-film resonator
    • 压电薄膜谐振器
    • US07535154B2
    • 2009-05-19
    • US12099880
    • 2008-04-09
    • Keiichi UmedaHideki Kawamura
    • Keiichi UmedaHideki Kawamura
    • H03H9/17H01L41/047
    • H03H9/02086H03H9/02157H03H9/173H03H9/175H03H9/584H03H9/587
    • In a piezoelectric resonator, a portion of a thin film unit is supported by a substrate. A portion of the thin film unit acoustically isolated from the substrate includes a) a vibration unit and b) an additional film. The vibration unit includes a piezoelectric film sandwiched between a pair of electrodes. The piezoelectric film is overlapped with the pair of electrodes in plan view. The additional film is disposed on one of the piezoelectric film and the electrodes so as to extend along at least a portion of the periphery of the vibration unit. When x (MN·second/m3) denotes an acoustic impedance of the additional film defined by the square root of the product of the density and Young's modulus, A denotes the product of the density and the thickness of the additional film, B denotes the product of the densities and the thicknesses of the electrodes, and y=A/B, the following conditional expressions are satisfied: In the range of 9.0≦x
    • 在压电谐振器中,薄膜单元的一部分被基板支撑。 从衬底声学隔离的薄膜单元的一部分包括a)振动单元和b)附加膜。 振动单元包括夹在一对电极之间的压电薄膜。 压电膜在平面图中与该对电极重叠。 附加膜设置在压电膜和电极中的一个上,以沿着振动单元的周边的至少一部分延伸。 当x(MN.second / m3)表示由密度和杨氏模量的乘积的平方根定义的附加膜的声阻抗时,A表示附加膜的密度和厚度的乘积,B表示 电极的密度和厚度的乘积以及y = A / B,满足以下条件表达式:<?in-line-formula description =“In-line formula”end =“lead”?> 9.0 <= x <44.0,0.0092.x + 0.88 <= y <0.067.x + 0.60(1a)<?在线公式描述=“在线公式”end =“tail”?> <?in -line-formula description =“In-line Formulas”end =“lead”?>在44.0 <= x <79.0,-0.0035.x + 1.45 <= y <0.015.x + 2.9(1b)的范围内。 ?in-line-formula description =“In-line Formulas”end =“tail”?>
    • 24. 发明申请
    • Piezoelectric Thin-Film Filter
    • 压电薄膜过滤器
    • US20080048803A1
    • 2008-02-28
    • US11933720
    • 2007-11-01
    • Keiichi UmedaHideki Kawamura
    • Keiichi UmedaHideki Kawamura
    • H03H9/58
    • H03H9/0095H03H9/009H03H9/6493
    • Providing is a piezoelectric thin-film filter including resonators connected in a lattice pattern, which can achieve large attenuation at frequencies away from a passband and improve steepness near two ends of the passband without involving an additional special step. Second resonators C—2 or first and third resonators C—1 and Cx—1 connected in parallel form series-arm resonators or parallel-arm resonators C—1 connected in a lattice pattern. The capacitance of each second resonator C—2 is larger than the capacitance of each first resonator C—1. The capacitance of each third resonator Cx—1 is substantially equal to the difference between the capacitance of the second resonator C—2 and the capacitance of the first resonator C—1. The resonant frequency of the first resonator C—1 higher than the resonant frequency of the second resonator C—2. The anti-resonant frequency of the third resonator Cx—1 is higher than the resonant frequency of the second resonator C—2 and lower than the resonant frequency of the first resonator C—1.
    • 提供一种包括以格子图案连接的谐振器的压电薄膜滤波器,其可以在远离通带的频率处获得大的衰减,并且改善通带两端附近的陡度,而不需要额外的特殊步骤。 并联连接的第二谐振器C 2 - 2或第一和第三谐振器C 1 - 1和C x - 1串联臂谐振器或并联臂 以晶格图案连接的谐振器C 1 - 1。 每个第二谐振器C 2 - 2的电容大于每个第一谐振器C 1 - 1的电容。每个第三谐振器C x的电容 - 1基本上等于第二谐振器C 2 - 2的电容和第一谐振器C 1 - 1的电容之间的差。第一谐振器的谐振频率 高于第二谐振器C 2的谐振频率。第三谐振器Cx1的反谐振频率为 高于第二谐振器C 2 - 2的谐振频率并且低于第一谐振器C 1 - 2的谐振频率。
    • 25. 发明申请
    • Branching filter and communication device
    • 分支过滤器和通讯装置
    • US20050237129A1
    • 2005-10-27
    • US10520015
    • 2003-10-10
    • Hideki Kawamura
    • Hideki Kawamura
    • H03H9/58H03H9/70H03H9/56
    • H03H9/02133H03H9/706
    • A branching filter and a communication device have excellent characteristics and an optimized configuration of a transmitting filter and a receiving filter. The branching filter includes a transmitting filter and a receiving filter wherein piezoelectric thin film resonators including a piezoelectric thin film sandwiched between opposed electrodes are arranged in a ladder type configuration on an opening or a recess of a substrate. The transmitting filter and the receiving filter connected in parallel to an antenna terminal. The piezoelectric thin film resonators defining the transmitting filter and the piezoelectric thin film resonators defining the receiving filter are different from each other.
    • 分路滤波器和通信装置具有优异的特性和发射滤波器和接收滤波器的优化配置。 分路滤波器包括发射滤波器和接收滤波器,其中包括夹在相对电极之间的压电薄膜的压电薄膜谐振器以梯形结构布置在基板的开口或凹槽上。 发射滤波器和接收滤波器与天线端子并联连接。 限定发射滤波器的压电薄膜谐振器和限定接收滤波器的压电薄膜谐振器彼此不同。
    • 27. 发明授权
    • Torque motor having uniform torque output characteristics
    • 扭矩电机具有均匀的转矩输出特性
    • US06215207B1
    • 2001-04-10
    • US09137523
    • 1998-08-21
    • Jiro KondoTomokazu KondoYuichiro MiuraHideki Kawamura
    • Jiro KondoTomokazu KondoYuichiro MiuraHideki Kawamura
    • H02K3300
    • H02K26/00
    • A torque motor comprises a rotor having a pair of permanent magnet groups, and a pair of stator cores. Each magnet group includes a plurality of plate or rod-shaped permanent magnets arranged in a circumferential direction. The magnet groups are arranged asymmetrically with respect to a rotary axis of the rotor. That is, one magnet group is displaced one-half angle of the pitch angle of each permanent magnet from the symmetric position of the other magnet group with respect to the rotary axis of the rotor. Alternatively, the stator cores are arranged asymmetrically with respect to the rotary axis of the rotor so that a front end of one stator core is displaced from the symmetric position of a front end of the other stator core in the circumferential direction. A cylindrical magnetic cover is fitted on the rotor to cover the permanent magnets circumferentially.
    • 扭矩马达包括具有一对永磁体组的转子和一对定子芯。 每个磁体组包括沿圆周方向布置的多个板状或棒状永磁体。 磁体组相对于转子的旋转轴线不对称地布置。 也就是说,一个磁体组相对于转子的旋转轴线从另一个磁体组的对称位置移位了每个永久磁铁的俯仰角的二分之一角。 或者,定子铁芯相对于转子的旋转轴线不对称地布置,使得一个定子铁心的前端从另一个定子铁心的前端在圆周方向的对称位置移位。 转子上安装有圆柱形的磁性盖,以便周向地覆盖永磁体。
    • 30. 发明授权
    • Reflective liquid-crystal display apparatus and manufacturing method thereof
    • 反射型液晶显示装置及其制造方法
    • US08427614B2
    • 2013-04-23
    • US13072049
    • 2011-03-25
    • Hideki Kawamura
    • Hideki Kawamura
    • G02F1/1333
    • G02F1/136209G02F1/136286
    • A method for manufacturing a reflective liquid-crystal display apparatus is provided. The method includes: forming, over a substrate, a first metal layer and a first insulating layer having an opening and a first through-hole in order; forming a metal portion filled in the opening and a first plug filled in the first through-hole, by forming a metal film over the first insulating layer and planarizing the metal film until the first insulating layer is exposed; forming, over the first insulating layer, a second insulating layer, a second metal layer having an opening, and a third insulating layer in order; forming, in the second and third insulating layer, a second through-hole that passes through the opening of the second metal layer and exposes an upper face of the first plug; and forming a second plug filled in the second through-hole, and a reflective electrode connected to the second plug.
    • 提供一种制造反射型液晶显示装置的方法。 该方法包括:依次在基板上形成具有开口和第一通孔的第一金属层和第一绝缘层; 通过在所述第一绝缘层上形成金属膜并使所述金属膜平坦化,直到所述第一绝缘层露出为止,形成填充在所述开口中的金属部分和填充在所述第一通孔中的第一插塞; 在第一绝缘层上形成第二绝缘层,具有开口的第二金属层和第三绝缘层; 在所述第二绝缘层和所述第三绝缘层中形成穿过所述第二金属层的开口并暴露所述第一插塞的上表面的第二通孔; 以及形成填充在第二通孔中的第二塞子,以及连接到第二插头的反射电极。