Recessed channel with separated ONO memory device

Details Recessed channel with separated ONO memory device Recessed channel with separated ONO memory device

2008-07-01

2008-07-01

Chambliss, Alonzo (Department: 2892)

Active solid-state devices (e.g., transistors, solid-state diode

Field effect device

Having insulated electrode

C257S321000, C438S259000

Reexamination Certificate

active

07394125

ABSTRACT:
Systems and methods of fabricating a U-shaped memory device with a recessed channel and a segmented/separated ONO layer are provided. Multibit operation is facilitated by a separated ONO layer, which includes a charge trapping region on sidewalls of polysilicon gate structures adjacent to source/drain regions. Programming and erasing of the memory cells is facilitated by the relatively short distance between acting source regions and the gate. Additionally, short channel effects are mitigated by a relatively long U-shaped channel region that travels around the recessed polysilicon gate thereby adding a depth dimension to the channel length.

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