Patent ID: 9029262
Filing Date: 2015-05-12
Classification: G03F,H01L

Abstract:
1. A method of forming a contact hole pattern, comprising: a hole pattern forming step in which a resist film having a hole pattern is formed on a substrate the hole pattern having cylindrical holes arranged perpendicular to the substrate; a block copolymer layer forming step in which a layer containing a block copolymer having a plurality of blocks bonded is formed on the resist film, so as to cover the resist film; a phase separation step in which, after the block copolymer layer forming step, the layer containing the block copolymer is subjected to phase separation; a selective removing step in which, after the phase separation step, a phase of at least one block of the plurality of blocks constituting the block copolymer is removed, so as to form one cylinder structure in each of the cylindrical holes of the hole pattern, wherein a hole diameter of each cylindrical hole of the hole pattern formed on the resist film is 0.8 to 3.1 times a period of the block copolymer, and in the block copolymer layer forming step, a thickness between an upper face of the resist film and a top surface of the layer containing the block copolymer is 70% or less of a thickness of the resist film.