Patent ID: 6731544
Filing Date: 2004-05-04
Classification: G11C

Abstract:
A method of programming a memory array that comprises a plurality of memory cells coupled to a plurality of word select lines, each of the memory cells having an adjustable threshold voltage and a gate overlying a channel and being programmable using channel hot electron injection, the method comprising:applying a first voltage to the channels; generating channel hot electrons in the channels of at least a first and a second of the memory cells; applying a second voltage to the gate of the first memory cell, the second voltage having a polarity and magnitude relative to the first voltage sufficient to attract the hot electrons and change the threshold voltage of the first memory cell to a programmed state; and applying a third voltage to the gate of the second memory cell, the third voltage having a polarity and magnitude relative to the first voltage sufficient to repel the hot electrons and deter change in the threshold voltage of the second memory cell.