VSL-based VT-compensation and analog program scheme for NAND array without CSL

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United States of America Patent

PATENT NO 9443579
APP PUB NO 20160049192A1
SERIAL NO

14828427

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Abstract

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A YUKAI NAND array comprising multiple strings of all TLC and mixed TLC+SLC memory cells associated with hierarchical global/local bit lines (GBL/LBL) and each string being associated with one LBL and having adjacent LBL as a dedicated local source line (LSL) with full BL-shielding without wasting extra silicon area and without a common source line to connect all strings. Each of the LBLs is interleavingly associated with either an Odd or Even string selected via one pair of dummy cells inserted in each string and is used as one on-chip PCACHE register with full BL-shielding to perform concurrent ABL, AnP and Alt-WL program under multi-passes program schemes with LBL program voltage compensations and half-BL Odd/Even program-verify and read operations with individual VSL-based Vt-compensation to mitigate high WL-WL and BL-BL coupling effects.

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APLUS FLASH TECHNOLOGY INCFREMONT CA

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lee, Peter Wung Saratoga, US 81 2706

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