Invention Grant
US07808826B2 Non-volatile storage with individually controllable shield plates between storage elements 有权
在存储元件之间具有单独可控屏蔽板的非易失性存储

Non-volatile storage with individually controllable shield plates between storage elements
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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