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논문 기본 정보

자료유형
학술저널
저자정보
강윤호 (광운대학교) 최영락 (광운대학교)
저널정보
한국신뢰성학회 신뢰성응용연구 신뢰성응용연구 제24권 제3호
발행연도
2024.9
수록면
221 - 232 (12page)
DOI
10.33162/JAR.2024.9.24.3.221

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초록· 키워드

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Purpose: This study analyzed the effects of RF on the degradation of GaAs pHEMT devices by establishing correlations between RF lifetime and DC lifetime, both obtained under various current-voltage accelerated conditions. It confirmed the necessity of RF-accelerated lifetime testing in compound semiconductors.
Methods: RF-ALT and DC-ALT tests were conducted under four current-voltage conditions within the load line. Scaling factors were derived from MTTF estimates using the Arrhenius model and from changes in IV curve parameters before and after testing. RF-MTTF and DC-MTTF were plotted on Arrhenius paper to compare degradation mechanisms, which were further assessed through focused ion beam analysis post-testing. Results: RF-induced degradation was found to be complex and temperature-dependent. At 85°C, the primary factor influencing RF-induced degradation was the maximum power dissipation point, with an MTTF estimated at over 106 hours. Below 60°C, high current points had a significant impact. Cross-sectional analysis revealed voiding on the drain, source, and gate.
Conclusion: A comparison of RF-ALT and DC-ALT results for GaAs pHEMT devices revealed that RF inputs caused complex degradation mechanisms not fully observable through DC-ALT alone. This finding highlights the importance of RF-ALT in ensuring the high reliability of next-generation high-frequency, high-power compound semiconductors.

목차

1. 서론
2. GaAs 반도체에 관한 수명평가의 이해
3. GaAs HEMT의 신뢰성을 위한 가속수명 시험 결과
4. 결론
References

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