Nonvolatile semiconductor memory having plural data storage...

Details Nonvolatile semiconductor memory having plural data storage... Nonvolatile semiconductor memory having plural data storage...

2008-07-01

2008-07-01

Ho, Hoai V (Department: 2827)

Static information storage and retrieval

Floating gate

Particular connection

C365S185210, C365S185220, C365S185280

Reexamination Certificate

active

07394695

ABSTRACT:
Data having three values or more is stored in a memory cell in a nonvolatile manner. A data circuit has a plurality of storage circuits. One of the plurality of storage circuits is a latch circuit. Another one of the plurality of storage circuits is a capacitor. The latch circuit and the capacitor function to temporarily store program/read data having two bits or more. Data held by the capacitor is refreshed using the latch circuit if data variation due to leakage causes a program. As a result, the data circuit does not become large in size even if multi-level data is used.

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