Patent ID: 6867453

Claim:
A NAND-type non-volatile memory device, comprising: a field oxide formed on a semiconductor substrate to define an active region; a string selection line and a ground selection line crossing the active region and substantially parallel to each other; word lines crossing the active region between the string selection line and the ground selection line; a cell gate insulator interposed between the word lines and active region and composed of a tunnel insulator, a charge trapping layer and a blocking insulator that are sequentially stacked on the semiconductor substrate; a string selection gate insulator interposed between the string selection line and the active region; and a ground selection gate insulator interposed between the ground selection line and the active region; wherein the string selection gate insulator and the ground selection gate insulator are each embodied as at least one of a single layered blocking insulator, and a double layered structure of the tunnel insulator and blocking insulator.