Patent ID: 6014332
Filing Date: 2000-01-11
Classification: G11C

Abstract:
A method of writing data to memory cells of a flash memory, the method comprising:performing write operations on a first set of memory cells;verifying data states on the first set of memory cells to identify any memory cells of the first set of memory cells which did not properly store data during the write operations;performing write operations on a second set of memory cells;verifying the data states on the second set of memory cells to identify any memory cells of the second set of memory cells which did not properly store data during the write operations;performing write operations on a third set of memory cells;verifying the data states on the third set of memory cells to identify any memory cells of the third set of memory cells which did not properly store data during the write operations;performing write operations on a fourth set of memory cells;verifying the data states on the fourth set of memory cells to identify any memory cells of the fourth set of memory cells which did not properly store data during the write operations; andlatching an address of the identified memory cells from the first, second, third and fourth set of memory cells which did not properly store data.