Pattern-forming composition

A method for producing a pattern, the method comprising:

• applying a pattern-forming composition to a base to form a film coated on the base;
• evaporating off organic solvent from said film coated on said base;
• irradiating the film with light through a mask having a pattern formed thereon;
• developing the film to obtain a pattern;
• and
• further baking the pattern after the developing to obtain the pattern having a shape of convex lens,
• wherein the pattern-forming composition contains a triazine ring-containing polymer that contains a repeating unit structure represented by formula (1) below and at least one triazine ring terminal, at least a part of the triazine ring terminal being blocked with a hydroxy group-substituted arylamino group;
• a crosslinking agent;
• and the organic solvent,
• wherein the triazine ring-containing polymer is a hyperbranched polymer,
• wherein each of R and R′ independently represents a hydrogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group, and
• Ar1 represents at least one structure selected from the group consisting of structures represented by formulae (2) to (13),
• wherein each of R1 to R92 independently represents a hydrogen atom, a halogen atom, a sulfo group, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms,
• each of R93 and R94 represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms,
• each of W1 and W2 independently represents a single bond, CR95R96, wherein each of R95 and R96 independently represents a hydrogen atom or an alkyl group having 1 to 10 carbon atoms or where R95 and R96 form a ring together with the carbon atom to which they are attached, C═O, O, S, SO, SO2, or NR97, wherein R97 represents a hydrogen atom, an alkyl group having 1 to 10 carbon atoms, or a phenyl group,
• each of X1 and X2 independently represents a single bond, an alkylene group having 1 to 10 carbon atoms, or a group represented by formula (14)
• wherein each of R98 to R101 independently represents a hydrogen atom, a halogen atom, a sulfo group, an alkyl group having 1 to 10 carbon atoms, or an alkoxy group having 1 to 10 carbon atoms,
• each of Y1 and Y2 independently represents a single bond or an alkylene group having 1 to 10 carbon atoms;
• wherein the hydroxy group-substituted arylamino group is represented by formula (15) below:
• and
• wherein a weight average molecular weight of the triazine ring-containing polymer is 2,000 to 10,000, the crosslinking agent is a polyfunctional (meth)acrylic compound in an amount of 5 to 90 parts by mass, per 100 parts by mass of the triazine ring-containing polymer, the organic solvent comprises N,N-dimethylformamide, dimethylsulfoxide, N-methyl-2-pyrrolidone, N,N-dimethylacetamide, 3-methoxy-N,N-dimethylpropanamide, 3-butoxy-N,N-dimethylpropanamide, or a mixed system thereof;
• the pattern-forming composition has a solid concentration of 0.1 to 40% by mass, and the further baking of the pattern is performed at 85 to 150° C. for 7 to 15 minutes after the developing to obtain the pattern having a shape of convex lens.