Thermal annealing process

摘要

A method for processing a substrate is provided; wherein the method comprises applying a film of a copolymer composition, comprising a poly(styrene)-b-poly(siloxane) block copolymer component; and, an antioxidant to a surface of the substrate; optionally, baking the film; annealing the film in a gaseous atmosphere containing ≧20 wt % oxygen; followed by a treatment of the annealed film to remove the poly(styrene) from the annealed film and to convert the poly(siloxane) in the annealed film to SiOx.

主权项

1. A method for processing a substrate, comprising:
providing a substrate having a surface; providing a copolymer composition, comprising:
a poly(styrene)-b-poly(siloxane) block copolymer component, wherein the number average molecular weight of the poly(styrene)-b-poly(siloxane) block copolymer component is 5 to 1,000 kg/mol; and,an antioxidant, wherein the copolymer composition contains >2 wt % (based on weight of block copolymer component) antioxidant; applying a film of the copolymer composition to the surface of the substrate; optionally, baking the film; annealing the film by heating the film at 240 to 350° C. under a gaseous atmosphere containing ≧20 wt % O2 for a period of 1 second to 4 hours; and, treating the annealed film to remove the poly(styrene) block from the annealed film and to convert the poly(siloxane) block in the annealed film to SiOx.