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3D NAND Flash Memory의 DCP와 NLSB Recovery Time 분석

Analysis of DCP and NLSB Recovery Time in 3D NAND Flash Memory

초록/요약

In this paper, we analyzed the channel potential after the DCP and NLSB in 16-layer 3D NAND Flash Memory in a time transient dynamic. The main cell channel of the 3D NAND flash structure is not directly connected to the substrate and is easily floated by the DCP and NLSB. Over time, the channel potential of DCP increased, and the channel potential of NLSB decreased. Also, in DCP, recovery occurred in the order of P1, P2, and P3, and in NLSB, the channel potential changed in the order of P3, P2, and P1. The channel potential recovery speed after DCP and NLSB is affected by electrons and holes concentration in the channel and spacer.

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목차

Ⅰ. 서론 1
1.1. 연구의 배경 1
1.2. DCP(Down Coupling Phenomenon) 5
1.3. NLSB(Natural Local Self Boosting) 7
Ⅱ. 시뮬레이션 과정 9
2.1. TCAD를 사용한 3D NAND flash memory 설계 9
Ⅲ. 결과 및 분석 13
3.1. DCP Transient Time에 따른 채널 전위 분석 13
3.2. NLSB Transient Time에 따른 채널 전위 분석 18
Ⅳ. 결론 26

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