Method of storing data in nonvolatile memory device and method of testing nonvolatile memory device

摘要

A method of storing data in a nonvolatile memory device comprises performing a program operation on target memory cells among multiple memory cells, performing a first verify operation to determine whether the target memory cells are in a program pass state or a program fail state, and as a consequence of determining that the target memory cells are in the program pass state, performing a second verify operation to determine whether the target memory cells exhibit a program error symptom.

主权项

1. A method of storing data in a nonvolatile memory device, comprising:
performing a program operation on target memory cells among multiple memory cells; performing a first verify operation to determine whether the target memory cells are in a program pass state or a program fail state; and as a consequence of determining that the target memory cells are in the program pass state, performing a second verify operation to determine whether the target memory cells exhibit a program error symptom, wherein performing the second verify operation comprises: counting a number of program loops used to place the target memory cells in the program pass state; and determining whether the target memory cells exhibit a progressive error by comparing the number of the program loops with a reference number.