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    • 27. 发明授权
    • Saw resonator with improved connections
    • 具有改进连接的锯片谐振器
    • US5955933A
    • 1999-09-21
    • US640948
    • 1996-05-15
    • Tokihiro NishiharaYoshio SatohHidema UchishibaTakashi MatsudaOsamu Ikata
    • Tokihiro NishiharaYoshio SatohHidema UchishibaTakashi MatsudaOsamu Ikata
    • H03H9/02H03H9/145H03H9/64H03H9/25H03H9/52
    • H03H9/6483H03H9/02944H03H9/145H03H9/64H03H9/02984
    • In a surface acoustic wave filter constituted with a ladder of resonators having a resonance frequency or an anti-resonance frequency, an input current flowing into a resonator in a parallel arm at the first stage from the input is so large as to deteriorate its lifetime caused from a heat generation by the resistance of the thin film wiring. As a measure to this problem, bonding wires (30, 31) connected onto points on connection electrodes (130, 131) for connecting an end of each of plural comb teeth electrodes 111 forming the resonators R.sub.s1 & R.sub.p1, or on a lead conductor (130-1) extended longitudinally from the connection electrode, are allotted at both sides of a center line (C1) of the plural comb teeth electrode group. Furthermore, a bonding wire may be connected substantially onto the center line C1 as well. It is preferable for the bonding wires to be located substantially symmetric with respect to the center line C1. It is preferable that the width along the longitudinal direction of the comb teeth electrodes is larger than a width of the comb teeth electrode.
    • PCT No.PCT / JP95 / 02293 Sec。 371日期:1996年5月15日 102(e)日期1996年5月15日PCT提交1995年11月10日PCT公布。 公开号WO96 / 15587 日期:1996年5月23日在由具有共振频率或反共振频率的谐振器的梯形构成的表面声波滤波器中,从输入端流入到并联臂的第一级的并联臂的谐振器的输入电流大到 由于薄膜布线的电阻而产生的热量使其寿命恶化。 作为这个问题的一个措施,连接在连接电极(130,131)上的点上的接合线(30,31)用于连接形成谐振器Rs1和Rp1的多个梳齿电极111的端部,或引线导体 130-1)从连接电极纵向延伸,分配在多个梳齿电极组的中心线(C1)的两侧。 此外,接合线也可以基本上连接在中心线C1上。 接合线优选相对于中心线C1大致对称。 梳齿电极的沿长度方向的宽度优选大于梳齿电极的宽度。