METHOD FOR PROGRAMMING A NON-VOLATILE MEMORY DEVICE, CAPABLE OF IMPROVING THE RELIABILITY OF DATA BY REDUCING THE DISTRIBUTION WIDTH OF A THRESHOLD VOLTAGE

摘要

PURPOSE: A method for programming a non-volatile memory device is provided to reduce the distribution width of the threshold voltage in memory cells by controlling the number of the program verifying operations of the memory cells.;CONSTITUTION: A program command is inputted. A program and a program verifying operation are implemented according to each program pulse. At least one program verifying operation is omitted while the program is operated n times. A program voltage is increased as much as a step voltage which is set according to the application of the program pulse. The program pulse is different for each cell groups in a first memory cell or a second memory cell.;COPYRIGHT KIPO 2011