Nonvolatile semiconductor memory having plural data storage portions for a bit line connected to memory cells
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Apr 16, 2002
Grant Date -
N/A
app pub date -
Sep 22, 2000
filing date -
Sep 28, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Loading Importance Indicators... 
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.
First Claim
Other Claims data not available
Family
Loading Family data...
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
- 274 Citation Count
- G11C Class
- 97.57 % this patent is cited more than
- 23 Age