Patent ID: 9612535
Date: 2017-04-04
CPC Classifications: C08F,G03F

Claim:
1. A pattern forming method comprising, in this order: (1) forming a film by using an electron beam- or extreme ultraviolet-sensitive resin composition containing a resin (Aa) having at least one group selected from the group consisting of a fluorine atom, a group having a fluorine atom, a group having a silicon atom, an alkyl group having 6 or more carbon atoms, an aryl group having 9 or more carbon atoms, an aralkyl group having 10 or more carbon atoms, an aryl group substituted with at least one alkyl group having 3 or more carbon atoms, and an aryl group substituted with at least one cycloalkyl group having 5 or more carbon atoms, and a resin (Ab) whose polarity is changed by the action of an acid; (2) exposing the film by using an electron beam or extreme ultraviolet ray; and (3) forming a negative pattern by performing development using a developer including an organic solvent after the exposure, wherein a content of the resin (Aa) is 31 to 90% by mass based on a total solid content in the electron beam- or extreme ultraviolet-sensitive resin composition, the resin (Ab) has a repeating unit represent by Formula (A): wherein in Formula (A), the resin (Ab) further has a repeating unit represented by Formula (A1) in an amount of 20 mol % to 90 mol % based on a total repeating units contained in the resin (Ab): wherein in Formula (A1),