Read operation for non-volatile storage with compensation for floating gate coupling
Abstract
May be caused by the coupling of the electric field based on the charge stored in non-volatile memory cells of the floating gate (or other charge storage device), variation of the apparent charge stored in adjacent floating gates (or other adjacent charge storing elements). This problem arises most clearly between sets of adjacent memory cells programmed at different times. In order to prevent such a coupling, to provide compensation to an adjacent memory cell read operation for a particular memory cell, which is adjacent to the memory cell it is to reduce the coupling effect that has on the particular memory cell. To this end, a read voltage is applied to the word line of the selected memory cell, applying a second pass voltage to the selected word line of the memory cell adjacent to the memory cell and is applied to the word line and the first pass voltage is added. Prior to the selected memory cell is read, the state of the adjacent memory cell is read, and the second pass voltage is set according to the state.
Term
Projected expiry 27 February 2027.
- Priority
- Filed
- Granted
- Today
- Projected expiry
3 priority claims, no other members on record
Priority claims3
| Document | Office | Kind | Date |
|---|---|---|---|
| 77885706 | United States of America | P | |
| 37797206 | United States of America | A | |
| 38405706 | United States of America | A |
1 legal event, as the office reported them to INPADOC
Events
| Event | Code | |
|---|---|---|
| Ceased as to paragraph 5 lit. 3 law introducing patent treatiesCeasedRER | RER |
Numbers
- Application
- 9015112
Titles2
- German
- LESEVERFAHREN FÜR NICHTFLÜCHTIGEN SPEICHER MIT KOMPENSATION DER FLOATING-GATE KOPPLUNG
- English
- READY FOR NON-VOLATILE MEMORY WITH COMPENSATION OF FLOATING-GATE COUPLING
Classification
- CPC, 2
- G11C16/26
- G11C16/3418
- IPC, 2
- G11C16 26
- G11C16 34