Patent ID: 8778201
Filing Date: 2014-07-15
Classification: B82Y,C03C,C08J,C23F,G03F,G11B,H01G,H01J,H01L,H01M,Y02E,Y02P,Y10S,Y10T

Abstract:
1. A method for forming a pattern comprising: forming a pattern transfer film on a substrate; forming a film made of a pattern forming material comprising a block copolymer or graft copolymer having two polymer chains whose ratio between dry etching rates is 1.3 or more on the pattern transfer film; annealing the film to form a microphase-separated structure in the film; ion-etching the film to selectively remove a polymer phase from the microphase-separated structure formed in the film; etching the pattern transfer film by using remaining another polymer phase as a mask, thereby transferring the pattern of the microphase-separated structure to the pattern transfer film; and etching the substrate by using the pattern transfer film as a mask in which the microphase-separated structure is transferred, thereby transferring the pattern of the microphase-separated structure to the substrate, wherein the ion-etching is performed with Ar, O