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Development of an adjustable rectangular pulse electrical overstress test system for electronic device robustness and

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This study introduces a new electrical overstress (EOS) test system for analyzing integrated circuit failures under prolonged stress. The system reveals novel triggering behaviors and failure mechanisms, improving electronic device reliability and EOS protection design.

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Area of Science:

  • Electrical Engineering
  • Materials Science
  • Semiconductor Physics

Background:

  • Increasing incidence of electrical overstress (EOS) failures in electronic devices necessitates improved reliability testing.
  • Conventional surge tests lack methodologies for analyzing device behavior under prolonged pulse width and high current, hindering quantitative EOS protection design.

Purpose of the Study:

  • To develop and validate a novel EOS test system for simulating diverse electrical stress conditions.
  • To investigate the behavioral characteristics and failure mechanisms of integrated circuits under long-pulse-width and DC electrical stress.
  • To propose an efficient test methodology for characterizing device behavior under prolonged EOS.

Main Methods:

  • Development of a versatile EOS test system with adjustable parameters (rise time, voltage, pulse width from 5 µs to DC).
  • System operates under a 50 Ω matched load, achieving up to 540 A short-circuit current.
  • Experimental analysis of a transient voltage suppressor under various long-pulse-width EOS conditions.

Main Results:

  • Observed previously uncharacterized triggering behavior in transient voltage suppressors under long-pulse-width stress.
  • Elucidated the failure process and determined the failure threshold curve for the tested device.
  • Demonstrated the system's capability for comprehensive device characterization and transient behavior analysis.

Conclusions:

  • The developed EOS test system provides a quantitative basis for top-down EOS protection design.
  • The findings enhance understanding of device failure mechanisms under prolonged electrical stress.
  • The proposed methodology and system support systematic EOS protection design and product reliability improvement.