Patent ID: 8785113

Claim:
A method for forming a reverse pattern on a substrate wherein the method comprises (I) applying a coating composition over a first patterned material wherein the coating composition comprises (i) a silsesquioxane resin comprised of the units (MeSiO (3-x)/2 (OR′) x ) m (RSiO (3-x)/2 (OR′) x ) n (R 1 SiO (3-x)/2 (OR′) x ) o (SiO (4-x)/2 (OR′) x ) p (Ph(CH 2 ) s SiO (3-x)/2 (OR′) x ) q where Ph is a phenyl group, Me is a methyl group; R′ is hydrogen atom or a hydrocarbon group having from 1 to 4 carbon atoms; R is a reactive organic group selected from groups containing epoxy functionality and groups containing acryloxy functionality, R 1 is a hydrophilic group; and s has a value of 0, 1, 2, 3, or 4; x has a value of 0, 1 or 2; and in the resin m has a value of 0.2 to 0.95, n has a value of 0.01 to 0.5; o has a value of 0 to 0.20; p has a value of 0 to 0.75; q has a value of 0 to 0.5 and m+n+o+p+q≈1; and (ii) a solvent for carrying the resin without dissolving the first patterned material; and (iii) an activator; (III) curing the coating composition to produce a cured silicon coating on top of the first patterned material covering the entire pattern; (IV) partially removing the cured silicon coating to expose the top surface of the first patterned material; (V) removing the first patterned material thereby forming a second patterned in the cured silicon coating; and (VI) optionally, further transferring the second pattern onto any underlayer; wherein the first patterned material is formed by a method consisting of applying a photoresist to the substrate and patterning the applied photoresist to form the first patterned material.