Patent ID: 9275751
Filing Date: 2016-03-01
CPC Classification: G11C

Claim Text:
1. A program method for a nonvolatile memory device, the method comprising: detecting threshold voltages of selected memory cells by applying a first verification voltage and a second verification voltage to a word line connected to the selected memory cells; responsive to the detecting of the threshold voltages of the selected memory cells, applying a first pulse to a word line connected to a first memory cell among the selected memory cells having a threshold voltage lower than the first verification voltage; and applying a second pulse to a word line connected to a second memory cell among the selected memory cells having a threshold voltage higher than the first verification voltage and lower than the second verification voltage and applying a program-inhibition voltage to a bit line connected to the second memory cell, the second pulse having a lower voltage level than the first pulse, wherein during a first period corresponding to application of the first pulse and a second period corresponding to application of the second pulse, the first and second memory cells are set up with program bit line voltages having a same level.