Patent ID: 9530645
Filing Date: 2016-12-27
CPC Classification: B81C,G03F,H01L

Claim Text:
1. A pattern forming method comprising the steps of: forming a photoresist film on a substrate; patterning the photoresist film to form a photoresist pattern; smoothing a surface of the photoresist pattern; after the step of smoothing, performing a predetermined surface treatment on the photoresist pattern; applying a block copolymer containing at least two kinds of polymers to the substrate on which the photoresist pattern has been smoothed, to form a film of the block copolymer; heating the substrate on which the film has been formed; selectively removing one of the at least two kinds of polymers; wherein the surface treatment is a hydrophilizing treatment of hydrophilizing the photoresist pattern, wherein the hydrophilizing treatment comprises the step of irradiating the photoresist pattern with ultraviolet light under an air atmosphere to hydrophilize the photoresist pattern with the active oxygen generated by the ultraviolet light.