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    • 41. 发明申请
    • ACOUSTIC WAVE FILTER
    • 声波滤波器
    • US20120105298A1
    • 2012-05-03
    • US13344274
    • 2012-01-05
    • Kazunori InoueTakashi MatsudaMichio Miura
    • Kazunori InoueTakashi MatsudaMichio Miura
    • H03H9/64H01Q1/50H03H9/72
    • H03H9/02992H03H9/02952H03H9/6483H03H9/725
    • A configuration that reduces a parasitic capacitance between wires is achieved at a low cost. Disclosed is an acoustic wave filter provided with a piezoelectric substrate 1, resonators 2a and 2b that include a comb-shaped electrode formed on the piezoelectric substrate 1, a wiring portion 3 that is connected to the comb-shaped electrode, and a dielectric layer 4 formed to cover the comb-shaped electrode. The wiring portion 3 is provided with a lower layer wiring portion 3d that is disposed in the same layer as the comb-shaped electrode and an upper layer wiring portion 3e that is disposed on the lower layer wiring portion 3d. The upper layer wiring portion 3e includes a region that has a wider electrode width than the electrode width of the lower layer wiring portion 3d.
    • 以低成本实现降低电线之间的寄生电容的结构。 公开了一种设置有压电基板1的谐波滤波器,包括形成在压电基板1上的梳状电极的谐振器2a和2b,连接到梳状电极的布线部分3和介电层4 形成为覆盖梳状电极。 布线部分3设置有与梳状电极相同的层中的下层布线部分3d和布置在下层布线部分3d上的上层布线部分3e。 上层布线部分3e包括具有比下层布线部分3d的电极宽度更宽的电极宽度的区域。
    • 42. 发明申请
    • BOUNDARY ACOUSTIC WAVE DEVICE AND COMMUNICATION EQUIPMENT
    • 边界声波设备和通信设备
    • US20110204994A1
    • 2011-08-25
    • US12711965
    • 2010-02-24
    • Satoru MatsudaMichio MiuraTakashi Matsuda
    • Satoru MatsudaMichio MiuraTakashi Matsuda
    • H03H9/72H01L41/04H03H9/64
    • H03H9/02834H03H9/0222H03H9/02653
    • A boundary acoustic waves device includes a piezoelectric substrate (16) having piezoelectricity, interdigitated electrodes (14a, 14b) formed on the piezoelectric substrate, a first medium (17) formed on the piezoelectric substrate so as to cover the interdigitated electrode, and a second medium (18) formed on the first medium. The interdigitated electrodes include a plurality of electrode fingers (13a, 13b) and bus bars (12a, 12b) that connect ends of the plurality of electrode fingers. A third medium (19a) is formed on the first medium. The second medium and the third medium are in contact with the first medium. The first medium, the second medium, and the third medium are formed of different materials. The first medium, the second medium, and the third medium are different in a ratio in length of a part with the third medium formed with respect to a length of a propagation path of boundary acoustic waves in a cross-section perpendicular to a longitudinal direction of the electrode fingers, in the longitudinal direction of the electrode fingers.
    • 声界面波装置包括具有压电性的压电基板(16),形成在压电基板上的交错电极(14a,14b),形成在压电基板上以覆盖交叉指状电极的第一介质(17) 介质(18)形成在第一介质上。 交叉电极包括连接多个电极指的端部的多个电极指(13a,13b)和母线(12a,12b)。 在第一介质上形成第三介质(19a)。 第二介质和第三介质与第一介质接触。 第一介质,第二介质和第三介质由不同的材料形成。 第一介质,第二介质和第三介质在与纵向方向垂直的截面中相对于边界声波的传播路径的长度形成的部分的长度的比例不同 的电极指的长度方向。