Patent ID: 9349597
Filing Date: 2016-05-24
CPC Classification: H01L

Claim Text:
1. A semiconductor memory device comprising: conductive films and insulating layers alternately stacked on a substrate; a substantially vertical channel layer penetrating the conductive films and the insulating layers; a multilayer film including a tunnel insulating layer, a charge storage film and a blocking insulating layer, the multilayer film surrounding upper surfaces, lower surfaces, and inner side walls of the conductive films, wherein the conductive films include a polysilicon film having P type impurities doped therein; and first anti-diffusion films, each anti-diffusion film formed along an outer wall of each conductive film opposite to the inner side wall of the conductive film, wherein the first anti-diffusion films prevent impurities included in the conductive films from being discharged outside from the outer side walls of the conductive films, wherein each of the first anti-diffusion films includes a nitride film formed through deposition or by nitriding the conductive films.