Invention Grant
- Patent Title: Reduced state quadbit
- Patent Title (中): 减少状态四边形
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Application No.: US11958557Application Date: 2007-12-18
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Publication No.: US07692962B2Publication Date: 2010-04-06
- Inventor: Darlene Hamilton , Fatima Bathul , Ken Tanpairoj , Ou Li , David Rogers , Roger Tsao
- Applicant: Darlene Hamilton , Fatima Bathul , Ken Tanpairoj , Ou Li , David Rogers , Roger Tsao
- Applicant Address: US CA Sunnyvale
- Assignee: Spansion LLC
- Current Assignee: Spansion LLC
- Current Assignee Address: US CA Sunnyvale
- Agency: Eschweiler & Associates, LLC
- Main IPC: G11C16/04
- IPC: G11C16/04

Abstract:
A reduced state memory device and methods of forming and programming multi-level flash memory cell element-pairs of the device, each element configured to store a blank level or two or more program levels are provided. In one embodiment, the reduced state memory device comprises a component configured to store in the memory cell element-pairs one pattern combination of a plurality of program pattern combinations comprising two blank levels, two program levels, and one blank level and one program level, the levels differing by less than a predetermined value. In one embodiment, a method of forming a memory device comprises forming at least one memory device of a multi-level flash memory array, each memory cell comprising two or more memory elements, each memory element configured to store three or more levels, and excluding one or more program pattern combinations that can be stored in the at least one memory cell.
Public/Granted literature
- US20090154235A1 REDUCED STATE QUADBIT Public/Granted day:2009-06-18
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