Patent ID: 8961802
Filing Date: 2015-02-24
Classification: B81C,H01L

Abstract:
1. A method of forming a fine pattern comprising: a phase separation step in which a layer containing a block copolymer having a plurality of blocks bonded is formed on a substrate, and then the layer is heated for phase separation thereof; a decomposition step in which at least a portion of a phase of at least one block of the plurality of blocks constituting the block copolymer in the layer is decomposed; a selective removal step in which the layer is immersed in a developing solution to selectively remove a phase containing blocks decomposed in the decomposition step to form a nano structure; and an etching step in which the substrate etched using the nano structure as a mask; wherein a main component of the developing solution is an organic solvent having an SP value of 7.5 to 11.5 (cal/cm