Patent ID: 9733566
Date: 2017-08-15
CPC Classifications: B81C,B82Y,C08L,C09D,G03F,H01L

Claim:
1. A method for patterning a substrate, the method comprising: depositing a tunable layer on a substrate, the tunable layer being an organic material having a first ratio of sigma bonds to pi bonds; identifying a mixture ratio of a first block copolymer to a second block copolymer that corresponds to a block copolymer mixture specified for deposition on the substrate; modifying the tunable layer, to result in a neutral layer, by increasing the first ratio of sigma bonds to pi bonds to a second ratio of sigma bonds to pi bonds, the second ratio of sigma bonds to pi bonds having a value that is equivalent to the mixture ratio of the first block copolymer to the second block copolymer, the neutral layer being neutral to both the first block copolymer and the second block copolymer; depositing the block copolymer mixture on the substrate; causing phase-separation of the block copolymer mixture such that self-assembly of the block copolymer mixture occurs: and forming a relief pattern from the tunable layer subsequent to modifying the tunable layer and prior to depositing the block copolymer mixture on the substrate.