Patent ID: 9378822
Filing Date: 2016-06-28
CPC Classification: G11C

Claim Text:
1. A method for programming memory cells of a selected word line associated with a nonvolatile memory device, comprising: providing a first word line programming signal being at plurality of voltage levels in different programming slots of a current programming operation to the memory cells of the selected word line, wherein the first word line programming signal is a ramping voltage signal; and providing a second word line programming signal being at plurality of voltage levels in different programming slots of a next programming operation to the memory cells of the selected word line, wherein the second word line programming signal is another one ramping voltage signal; wherein a highest voltage level of the first word line programming signal is the same as that of the second word line programming signal, and a number of the voltage levels of the first word line programming signal is larger than that of the second word line programming signal.