Static information storage and retrieval – Floating gate – Disturbance control
Reexamination Certificate
2011-01-04
2011-01-04
Nguyen, VanThu (Department: 2824)
Static information storage and retrieval
Floating gate
Disturbance control
C365S185260, C365S185170
Reexamination Certificate
active
07864570
ABSTRACT:
In an improved EASB programming scheme for a flash device (e.g. a NAND flash device), the number of word lines separating a selected word line (to which a program voltage is applied) and an isolation word line (to which an isolation voltage is applied) is adjusted as a function (e.g. inverse function) of distance of the selected word line from the drain side select gate to reduce program disturb due to high vertical and lateral electric fields at or near the isolation transistor when programming word lines closer to the drain side select gate. The selected and isolation word lines are preferably separated by two or more word lines to which intermediate voltage(s) are applied.
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Davis , Wright, Tremaine, LLP
Nguyen Vanthu
SanDisk Corporation
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