Patent ID: 11887671
Assignee: YANGTZE MEMORY TECHNOLOGIES CO., LTD.
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A method for programming a three-dimensional (3D) memory device, wherein the 3D memory device comprises memory strings with memory cells vertically stacked, and wherein each memory cell is addressable through a word line and a bit line, the method comprising:
applying a program voltage on a selected word line;
applying a first pass voltage on a first group of unselected word lines;
applying a second pass voltage on a second group of unselected word lines, wherein the second pass voltage is different from the first pass voltage; and
determining a first maximum pass voltage when shifts of threshold voltages of a first set of unselected memory cells connected to the first group of unselected word lines are less than a maximum allowed shift.