Patent ID: 8853101
Filing Date: 2014-10-07
Classification: B81C,B82Y,G03F,H01L

Abstract:
1. A method for creating chemical guide patterns by directed self-assembly (DSA) lithography for fabricating an integrated circuit comprising: forming a bifunctional brush layer of a polymeric material overlying an anti-reflective coating on a semiconductor substrate, wherein the polymeric material comprises a neutral polymeric block portion and a pinning polymeric block portion that are coupled together, and wherein the bifunctional brush layer comprises a neutral layer that is formed of the neutral polymeric block portion and a pinning layer that is formed of the pinning polymeric block portion; selectively removing a portion of the neutral layer or the pinning layer to define a chemical guide pattern; depositing a block copolymer layer overlying the chemical guide pattern; and phase separating the block copolymer layer to define a nanopattern that is registered to the chemical guide pattern.