Patent ID: 7951720

Claim:
A method for forming a contact hole of a semiconductor device, comprising: forming a reaction layer on a semiconductor substrate; forming a mask on the reaction layer, the mask being formed to have openings exposing a portion of the reaction layer corresponding to a region on which the contact hole will be formed; forming the reaction pattern on the exposed portion of the reaction layer by performing an exposure process and a post exposure bake process: removing the mask; forming a self-assembled monolayer having a column shape protruding away from the reaction layer by injecting a functional group that chemically bonds to the reaction pattern; forming a coating layer as a sacrificial layer over the self-assembled monolayer and the reaction layer; and forming the contact hole in the semiconductor substrate by performing a blanket etching process on the semiconductor substrate having the coating layer, the self-assembled monolayer, and the reaction layer formed thereon.