Static information storage and retrieval – Floating gate – Particular biasing
Reexamination Certificate
2007-06-25
2009-12-22
Luu, Pho M. (Department: 2824)
Static information storage and retrieval
Floating gate
Particular biasing
C365S185130, C365S185140, C365S185280
Reexamination Certificate
active
07636260
ABSTRACT:
A method for controlling non-volatile storage having individually controllable shield plates between storage elements. The shield plates are formed by depositing a conductive material such as doped polysilicon between storage elements and their associated word lines, and providing contacts for the shield plates. The shield plates reduce electromagnetic coupling between floating gates of the storage elements, and can be used to optimize programming, read and erase operations. The shield plates provide a field induced conductivity between storage elements in a NAND string during a sense operation so that source/drain implants are not needed in the substrate. Alternating high and low voltages are applied to the shield plates, or a common voltage is applied to the shield plates.
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Luu Pho M.
SanDisk Corporation
Vierra Magen Marcus & DeNiro LLP
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