| 摘要 |
PROBLEM TO BE SOLVED: To provide a nonvolatile memory that uses enhanced soft programming.SOLUTION: A semiconductor memory device comprises a memory controller, and an array of memory cells coupled to communicate with the memory controller. The memory controller is configured to perform a first soft program operation using first soft program voltages and a first soft program verification level, and determine whether a first charge trapping threshold has been reached. When the first charge trapping threshold has been reached, a second soft program operation is performed using second soft program voltages and a second soft program verification level. |
