Patent ID: 8222122
Filing Date: 2012-07-17
Classification: H01L

Abstract:
1. A method of forming a nonvolatile memory device, comprising: alternatingly stacking n number of dielectric layers and n number of conductive layers on a substrate, wherein n>2, and n is a natural number; forming a photosensitive pattern on the alternatingly stacked dielectric layers and conductive layers; forming a non-photosensitive pattern on the alternatingly stacked dielectric layers and conductive layers, wherein the non-photosensitive pattern is formed in a spacer shape on a sidewall of the photosensitive pattern; etching an i-th conductive layer and an i-th dielectric layer by using the non-photosensitive pattern as an etch mask, wherein 2≦i≦n, and i is a natural number indicating a stacking order of the conductive layers and the dielectric layers; laterally etching a sidewall of the non-photosensitive pattern; and etching the i-th conductive layer, (i−1)-th conductive layer, i-th dielectric layer and (i−1)-th dielectric layer by using the etched non-photosensitive pattern as an etch mask.