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논문 기본 정보

저자정보
(Hongik University) (Seoul National University) (Hongik University)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.20 No.6
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피인용 4

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    초록·키워드

    An O₂ based selective GaN etching process was developed herein for use in p-GaN gated AlGaN/GaN heterojunction field-effect transistor fabrication, where precise control of the p-GaN etching was an important process step that determined the device characteristics. The p-GaN layer was etched by a two-step process: low damage BCl₃/Cl₂ plasma etching in conjunction with Cl₂/N₂/O₂ based selective etching. A high selectivity of 53:1 for the p-GaN:AlGaN was achieved by the Cl₂/N₂/O₂ plasma etching. The device fabricated by the optimized etching process exhibited excellent enhancement-mode characteristics, i.e., a threshold voltage of 2.45 V, a specific on-resistance of 5.55 mΩ·cm², an on/off ratio of ~10<SUP>9</SUP>, and an off-state breakdown voltage of >1100 V.

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      UCI(KEPA) : I410-ECN-0101-2021-569-001450999