메뉴 건너뛰기
소속 기관 / 학교 인증
인증하면 논문, 학술자료 등을  무료로 열람할 수 있어요.
한국대학교, 누리자동차, 시립도서관 등 나의 기관을 확인해보세요
(국내 대학 90% 이상 구독 중)
고객센터 ENG
주제분류

논문 기본 정보

저자정보
(Seoul National University) (Seoul National University) (Seoul National University) (Seoul National University) (Seoul National University) (Seoul National University) (Seoul National University) (Samsung Electronics) (Samsung Electronics) (Samsung Electronics) (Seoul National University)
저널정보
대한전자공학회 JOURNAL OF SEMICONDUCTOR TECHNOLOGY AND SCIENCE Journal of Semiconductor Technology and Science Vol.26 No.5
오류 신고하기

피인용 0

검색

    초록·키워드

    This work investigates the impact of channel hole geometry and fabrication-induced device variations on 3D NAND flash memory using three-dimensional technology computer-aided design (TCAD) simulations. The channel hole diameter (d<sub>hole</sub>) is varied over a practical range, tapered and elliptic profiles are introduced to emulate high-aspect-ratio etch distortion, and oxide-nitride-oxide (ONO) thickness fluctuation is applied to reflect deposition non-idealities. The study focuses on the programmed threshold voltage (V<sub>th</sub>), subthreshold swing (SS), and bit-line (BL) current (I<sub>BL</sub>) of each WL and also includes the effect of read temperature in the typical operating range. The results indicate that reducing d<sub>hole</sub> increases the program efficiency while decreasing I<sub>BL</sub>. Regarding process variations, both increased ellipticity and ONO thickness were found to degrade the programmed V<sub>th</sub>. However, while IBL increases notably with ellipticity, it exhibits a relatively weak dependence on ONO thickness. Furthermore, elevated read temperatures consistently reduce the apparent Vth and I<sub>BL</sub>, thereby tightening the sensing margin for multi-level operation. These findings elucidate the distinct impacts of geometric scaling on device variability and provide useful design guidelines for high-density memory architectures.

    최근 본 자료 전체보기