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An aging model for surface acoustic wave devices.

P L Scarff1, M B Carey, J E Huff

  • 1ATandT Bell Lab., North Andover, MA.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
|January 1, 1993
PubMed
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This study models phase aging in quartz-crystal surface acoustic wave (SAW) filters for undersea communication. The enhanced model accurately predicts device stability over time and temperature, meeting application requirements.

Area of Science:

  • Materials Science
  • Electrical Engineering
  • Telecommunications

Background:

  • Surface Acoustic Wave (SAW) filters are critical components in telecommunication systems.
  • Understanding phase aging is crucial for ensuring the long-term reliability of SAW devices.

Purpose of the Study:

  • To develop an extended aging model for quartz-crystal SAW filters.
  • To capture both time and temperature dependence of phase aging.
  • To predict the end-of-life phase-aging distribution for undersea telecommunication applications.

Main Methods:

  • Investigated phase-aging kinetics of a 591.2 MHz quartz-crystal SAW filter.
  • Extended a previously established SAW-device aging model to include temperature dependence.
  • Identified and assessed sources of error, incorporating error distributions into the model.

Related Experiment Videos

  • Developed a composite aging model for time and temperature-dependent phase aging.

    • Main Results:

    • The extended aging model accurately describes time and temperature dependence of phase aging.
    • A composite model was created, incorporating error distributions for comprehensive phase-aging prediction.
    • The model successfully predicts end-of-life phase-aging distributions.

    Conclusions:

    • The developed composite aging model provides a robust framework for predicting SAW filter degradation.
    • Quartz-crystal SAW filters demonstrate the high stability required for undersea telecommunication systems.
    • The study validates the predictive capability of the enhanced aging model for critical electronic components.