Patent ID: 9390803
Filing Date: 2016-07-12
CPC Classification: G11C,H01L

Claim Text:
1. A method of programming a nonvolatile memory device which includes a plurality of memory cell strings including a first memory cell string, the first memory cell string including a plurality of serially-connected nonvolatile memory cells, the method comprising: programming each of the plurality of serially-connected nonvolatile memory cells by an incremental step pulse program (ISPP) method that uses a program voltage including an initial program voltage and an increment, a level of the program voltage increasing by the increment from a level of the initial program voltage; and verifying each of the plurality of serially-connected nonvolatile memory cells, wherein the plurality of serially-connected nonvolatile memory cells are stacked on or above a substrate in a direction that is vertical to the substrate, and the level of the initial program voltage of the program voltage that is applied to a corresponding one of the plurality of serially-connected nonvolatile memory cells is related with a distance between the corresponding one of the plurality of serially-connected nonvolatile memory cells and the substrate.