Invention Grant
US09171628B2 Incremental step pulse programming (ISPP) scheme capable of determining a next starting pulse based on a current program-verify pulse for improving programming speed 有权
增量步进脉冲编程(ISPP)方案能够基于当前的程序验证脉冲来确定下一个起始脉冲,以提高编程速度

Incremental step pulse programming (ISPP) scheme capable of determining a next starting pulse based on a current program-verify pulse for improving programming speed
Abstract:
A method for programming a memory including a plurality of memory cells is provided. The method comprises selecting a current cell and executing a pre-program verify operation at a first program verify level. The method comprises executing a program and program verify operation for the current cell, including applying a sequence of program pulses and performing program verify steps. The sequence includes a starting pulse having a starting magnitude. The program verify steps use a second program verify level. The method also comprises determining the starting magnitude for a next cell as a function of a magnitude of the program pulse in an instance of the program verify step in which the current cell passes verify at the second program verify level.
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