The Power Durability of 900 MHz Band Double-Mode-Type Surface Acoustic Wave Filters and Improvement in Power Durability of Al-Cu Thin Film Electrodes by Cu Atom Segregation.

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  • Kimura Noritoshi
    Advanced Products Development Center, TDK Corporation, 2–15–7 Higashi–ohwada, Ichikawa, Chiba 272, Japan
  • Nakano Masahiro
    Advanced Products Development Center, TDK Corporation, 2–15–7 Higashi–ohwada, Ichikawa, Chiba 272, Japan
  • Nakazawa Michiyuki
    Advanced Products Development Center, TDK Corporation, 2–15–7 Higashi–ohwada, Ichikawa, Chiba 272, Japan
  • Sato Katsuo
    Advanced Products Development Center, TDK Corporation, 2–15–7 Higashi–ohwada, Ichikawa, Chiba 272, Japan

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  • Power Durability of 900MHz Band Double-

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The power durability of double-mode-type surface acoustic wave filters, which have recently seen wide use in cellular phones, is investigated. It was found that the lifetime of double-mode-type surface acoustic wave filters is reduced considerably when high input power is applied, due to non-linear behavior. Moreover, the authors demonstrate that the power durability of an Al-Cu thin film electrode is greatly improved by Cu atom segregation in the grain boundaries.

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