Patent ID: 9177818
Filing Date: 2015-11-03
Classification: G03F,H01L

Abstract:
1. A pattern formation method comprising: forming a block copolymer layer in an opening of a resist layer provided on an underlayer, the underlayer includes a third layer containing a silicon compound, a film to be processed provided under the third layer, and an organic film between the third layer and the film to be processed, the block copolymer layer containing a polystyrene derivative and an acrylic, and the acrylic having 6 or more carbon atoms on a side chain; forming a first layer containing the polystyrene derivative and a second layer containing the acrylic in the opening by phase-separating the block copolymer layer; removing the second layer; etching the third layer by using the resist layer and the first layer as a mask; and etching the organic film by using the third layer as a mask.