Patent ID: 8859189

Claim:
A patterning process, comprising: forming a silicon-containing film on a body to be processed by using a composition for the silicon-containing film; forming, on the silicon-containing film, a photoresist film by using a chemical amplification resist composition; heating the photoresist film; after heating, exposing a high energy beam to the photoresist film; and forming a negative pattern by dissolving an unexposed area of the photoresist film by using a developer of an organic solvent; wherein a portion of the silicon-containing film corresponding to the exposed area of the photoresist film has a pure-water contact angle in a range of 35 degrees to 70 degrees after the exposing; and the composition for the silicon-containing film comprises a silicon-containing compound (A) having a repeating unit shown by the following general formula (A-1): wherein X represents an oxygen-containing functional group shown by any of the following general formulae (A-1-1), (A-1-2), and (A-1-3): wherein n1 represents 1 or 2; R 1 represents a single bond or a linear, a branched, or a cyclic saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms; R 2 represents a hydrogen atom, or a linear, a branched, or a cyclic saturated or unsaturated hydrocarbon group having 1 to 10 carbon atoms; R 1 and R 2 may contain one or more selected from the group consisting of an oxygen atom, a silicon atom, and a halogen atom; and the dotted line shows a bonding site to the silicon atom; —R 3 R 4 —O—R 5 ) n2 (A-1-2) wherein n2 represent 1 or 2; each R 3 and R 4 independently represents a single bond, or a linear, a branched, or a cyclic saturated or unsaturated hydrocarbon group having 1 to 20 carbon atoms, though they do not represent a single bond simultaneously; R 5 represents a hydrogen atom, or a linear, a branched, or a cyclic saturated or unsaturated hydrocarbon group having 1 to 10 carbon atoms, or an acyl group: R 3 , R 4 , and R 5 may contain one or more selected from the group consisting of an oxygen atom, a silicon atom, and a halogen atom; and the dotted line shows a bonding site to the silicon atom; wherein n3 represent 0, 1, or 2; each R 6 , R 7 , and R 8 independently represents a saturated or unsaturated organic group having 1 to 20 carbon atoms and may contain any of an oxygen atom, a silicon atom, and a halogen atom, and may form a cyclic organic group by bonding any two or more of the R 6 , R 7 , and R 8 ; and the dotted line shows a bonding site to the silicon atom; and Y represents a hydrogen atom, or any of an alkyl group, an alkoxy alkyl group, and a trialkyl silyl group, with the carbon atoms contained in the alkyl groups being 1 to 6, or a repeating unit shown by the following general formula (A-1-4) or (A-1-5): wherein X represents the same meaning as before.