Patent ID: 11955184
Assignee: SANDISK TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 10:
11. A method for programming and reading memory cells, the method comprising:
programming a first set of memory cells in a selected block in a three-dimensional memory structure to a first natural threshold voltage distribution while programming a second set of memory cells in the selected block in the three-dimensional memory structure to a second natural threshold voltage distribution, the first set of memory cells comprising one or more rows of memory cells that extend perpendicular to bit lines, the second set of memory cells comprising one or more rows of memory cells that extend perpendicular to the bit lines, wherein the second natural threshold voltage distribution has a different threshold voltage range than the first natural threshold voltage distribution, wherein the first set of memory cells are a different distance than the second set of memory cells to an isolation region that separates the selected block from an adjacent block;
reading the first set of the memory cells with a first set of read parameters; and reading the second set of the memory cells with a second set of read parameters, wherein the first set of read parameters are different from the second set of read parameters to compensate for the different threshold voltage ranges in the first and the second natural threshold voltage distributions.