Patent ID: 8491804

Claim:
A method of processing a substrate including a processing target layer and a patterned organic film, the method comprising: modifying the patterned organic film to produce a modified patterned film, wherein the modifying includes allowing a silicon-containing gas to be adsorbed onto a surface of the patterned organic film; and oxidizing adsorbed silicon to thereby produce the modified patterned film, wherein the modified patterned film includes a silicon oxide film, and wherein during at least one of the allowing and the oxidizing at least a portion of a material of the patterned organic film is removed; and performing a post-modification etching of the silicon oxide film to thereby produce an etched modified patterned structure, wherein a line width of a line portion of the patterned organic film immediately prior to modifying is greater than the line width of the line portion of the modified patterned film after the post-modification etching.