Patent ID: 9423689
Filing Date: 2016-08-23
CPC Classification: C08F,G03F

Claim Text:
1. A pattern forming method, comprising: (i) a step of forming a film from an actinic ray-sensitive or radiation-sensitive resin composition containing (P) a resin having (a1) a repeating unit represented by the following formula (I) or (II) in an amount of 20 mol % or more based on all repeating units in the resin (P), and a repeating unit, in addition to (a1), containing a group capable of decomposing by the action of an acid to produce a polar group; and (B) a compound capable of generating an acid upon irradiation with an actinic ray or radiation; (ii) a step of exposing the film, so as to form an exposed film; and (iii) a step of developing the exposed film by using a developer containing an organic solvent to form a negative pattern: wherein each of X Ra Ra each of L each of Rb each of n and p independently represents an integer of 1 or more; m represents an integer of 0 to 2; o represents 0 or 1; Y Y Group (a): a group of monovalent organic groups consisting of a carboxyl group (—COOH), a cyano group (—CN), a nitro group (—NO Group (b): a group of divalent polar groups consisting of a keto group (—CO—), a carbonate group (—O—CO—O—), a carboxylic acid anhydride group (—CO—O—CO—), a sulfinyl group (—SO—), a sulfonyl group (—SO Group (c): a group of trivalent polar groups consisting of an amino group (—N<), an amido group (—CO—N<), a sulfonamido group (—SO and a sulfonimide group represented by the following formula: provided that when Y wherein the resin composition further comprises a compound represented by formula (F): wherein each Ra independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, and when n=2, two Ra may be the same or different, and two Ra may combine with each other to form a divalent heterocyclic hydrocarbon group or a derivative thereof; each Rb independently represents a hydrogen atom, an alkyl group, a cycloalkyl group, an aryl group or an aralkyl group, provided that in —C(Rb)(Rb)(Rb), when one or more Rb are a hydrogen atom, at least one of remaining Rb is a cyclopropyl group or a 1-alkoxyalkyl group, and at least two Rb may combine to form an alicyclic hydrocarbon group, an aromatic hydrocarbon group, a heterocyclic hydrocarbon group or a derivative thereof; n represents an integer of 0 to 2, m represents an integer of 1 to 3, and n+m=3.