Techniques for reducing read disturb in partially written blocks of non-volatile memory

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United States of America Patent

PATENT NO 9978456
SERIAL NO

14543660

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Abstract

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Techniques are presented to reduce the amount of read disturb on partially written blocks of NAND type non-volatile memory, both for when determining the last written word line in a block and also for data read. In both cases, non-selected word lines that are unwritten or, in the case of finding the last written word line, may be unwritten are biased with a lower read-pass voltage then is typically used. The result of such reads can also be applied to an algorithm for finding the last written word by skipping a varying number of word lines. Performance in a last written page determination can also be improved by use of shorter bit line settling times than for a standard read.

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Patent Owner(s)

  • SANDISK TECHNOLOGIES LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Avila, Chris Saratoga, US 66 1462
Chin, Henry Fremont, US 106 1960
Dusija, Gautam Milipitas, US 27 343
Hsu, Cynthia Fremont, US 28 382
Khandelwal, Anubhav Mountain View, US 32 711
Lee, Dana Saratoga, US 143 3920
Manohar, Abhijeet Karnataka, IN 63 852
Tuers, Daniel Kapaa, US 21 365

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