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논문 기본 정보

자료유형
학술저널
저자정보
Hee Dae An (Kyungpook National University) So Ra Min (Kyungpook National University) Sang Ho Lee (Kyungpook National University) Jin Park (Kyungpook National University) Geon Uk Kim (Kyungpook National University) Young Jun Yoon (Korea Atomic Energy Research Institute) Jae Hwa Seo (Korea Electrotechnology Research Institute) Min Su Cho (DB HiTek) Jaewon Jang (Kyungpook National University) Jin-Hyuk Bae (Kyungpook National University) Sin-Hyung Lee (Kyungpook National University) In Man Kang (Kyungpook National University)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.22 No.2
발행연도
2022.4
수록면
105 - 114 (10page)
DOI
10.5573/JSTS.2022.22.2.105

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초록· 키워드

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In this paper, a recessed gate AlGaN/GaN metal-oxide-semiconductor field-effect-transistor (MOSFET) with Si₃N₄/TiO₂ stacked dual gate dielectric was proposed and fabricated to improve the current drivability. Normally-off operation with a V<SUB>th</SUB> of 1.81 V was obtained using a Cl₂-based gate recess etching process. Dual gate dielectric technology was used to improve the current characteristics that can be degraded by damage resulting from gate recess etching. Compared to the single gate dielectric (Si₃N₄ = 30 ㎚)-based device, the I<SUB>D,max</SUB> and g<SUB>m</SUB> of the dual gate dielectric (Si₃N₄/TiO₂ = 10/20 ㎚)-based device were improved by 292% and 195%, respectively. Moreover, the R<SUB>on</SUB> and SS were improved by 62% and 68%, respectively. Breakdown voltage decreased by 1.4%, but there was minor difference. Therefore, the technique of depositing Si₃N₄ on GaN and then stacking high-k TiO₂ can improve the current characteristics by increasing the capacitance through a simple process. As such, the recessed gate AlGaN/GaN MOSFETs with Si₃N₄/TiO₂ stacked dual gate dielectric has the potential for high-efficiency power devices.

목차

Abstract
Ⅰ. INTRODUCTION
Ⅱ. STRUCTURE AND FABRICATION
Ⅲ. RESULTS AND DISCUSSION
Ⅳ. CONCLUSION
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