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    • 4. 发明授权
    • Surface acoustic wave element having a bump electrode and surface acoustic wave device comprising the same
    • 具有凸起电极的表面声波元件和包括该凸起电极的表面声波器件
    • US06404110B1
    • 2002-06-11
    • US09074824
    • 1998-05-08
    • Koji NakashimaHideya MorishitaHiromichi Yamada
    • Koji NakashimaHideya MorishitaHiromichi Yamada
    • H01L4108
    • H03H9/059H03H9/145
    • A surface acoustic wave element includes a surface acoustic wave substrate, an interdigital transducer electrode provided on the surface acoustic wave substrate and a lead electrode provided on the surface acoustic wave substrate. The lead electrode is connected to the interdigital transducer electrode. The surface acoustic wave element further includes a bump electrode provided on a portion of the lead electrodes. The bump electrode includes a first electrode structure and a second electrode structure. The first electrode structure has a top surface and is arranged in contact with the lead electrode, and the second electrode structure covers a portion of the top surface of the first electrode structure such that the remaining portion of the top surface of the first electrode structure is exposed along an entire periphery of the top surface of the first electrode structure.
    • 表面声波元件包括表面声波基板,设置在表面声波基板上的叉指式换能器电极和设置在弹性表面波基板上的引线电极。 引线电极连接到叉指式换能器电极。 表面声波元件还包括设置在引线电极的一部分上的突起电极。 突起电极包括第一电极结构和第二电极结构。 第一电极结构具有顶表面并且与引线电极接触地布置,并且第二电极结构覆盖第一电极结构的顶表面的一部分,使得第一电极结构的顶表面的剩余部分为 沿着第一电极结构的顶表面的整个周边露出。