Patent ID: 7090784

Claim:
A method for forming a pattern comprising: on a substrate, forming a film comprised of a pattern forming material, wherein the pattern forming material comprises a block copolymer or graft copolymer comprising: a polymer chain comprising a repeating unit represented by the following formula: wherein R 1 and R 2 independently represent a substituted or unsubstituted alkyl group, aryl group aralkyl group or alkoxyl group having 1 to 20 carbon atoms; and a thermally decomposable polymer chain; forming a microphase-separated structure in the film, said microphase-separated structure comprising a thermally decomposable polymer phase and a remaining polymer phase; removing the thermally decomposable polymer phase from the microphase-separated structure by heating said film to a thermal decomposition temperature or more, to form a pattern of the microphase-separated structure; and transferring the pattern of the microphase-separated structure to the substrate by etching the substrate using the remaining polymer phase in the film as a mask.