Static information storage and retrieval – Floating gate – Particular connection
Reexamination Certificate
2007-06-25
2010-10-05
Hoang, Huan (Department: 2827)
Static information storage and retrieval
Floating gate
Particular connection
C365S185110, C365S185250
Reexamination Certificate
active
07808826
ABSTRACT:
A 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. In one approach, 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. In some control schemes, alternating high and low voltages are applied to the shield plates. In other control schemes, a common voltage is applied to the shield plates.
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Hoang Huan
Sandisk Corporation
Vierra Magen Marcus & De Niro LLP
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