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1. (WO2018106303) DATA RECOVERY METHOD AFTER WORD LINE-TO-WORD LINE SHORT CIRCUIT

Pub. No.:    WO/2018/106303    International Application No.:    PCT/US2017/050867
Publication Date: Fri Jun 15 01:59:59 CEST 2018 International Filing Date: Mon Sep 11 01:59:59 CEST 2017
IPC: G11C 29/52
G11C 29/02
G11C 29/42
G11C 29/44
G11C 16/34
G11C 11/56
G11C 16/10
G11C 16/14
G11C 16/04
G11C 29/04
G11C 16/26
Applicants: SANDISK TECHNOLOGIES LLC
Inventors: ZHANG, Zhengyi
DONG, Yingda
Title: DATA RECOVERY METHOD AFTER WORD LINE-TO-WORD LINE SHORT CIRCUIT
Abstract:
A memory device and associated techniques provide a read recovery of data in case of a short circuit between word lines. When cells of a recovery word line WLrec are successfully programmed but cells of an adjacent work line WLrec+1 are not successfully programmed, the data of the cells of WLrec can be recovered. The cells of WLrec+1 are erased so that a low pass voltage on WLrec+1 is adequate to provide these cells in a conductive state during the recovery read of WLrec. Capacitive coupling between the word lines which shifts the apparent threshold voltage of the cells on WLrec is reduced so that a more accurate recovery read can be performed. Read voltages on WLrec can be upshifted compared to baseline read voltages.