Photosensitive composition and pattern-forming method using the same

1. A photosensitive composition comprising:

(A) a compound represented by the following formula (I):

 wherein

Ar 1 and Ar 2 each independently represents a benzene ring, and

Ar 3 is an optionally substituted benzene ring, wherein the substituent is selected from the group consisting of a straight chain, branched or cyclic alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, an acyl group having from 1 to 6 carbon atoms, a cyano group, a nitro group, a halogen group, a -Q-SO 2 Ra group and a -Q-CORb group, and

wherein at least one of Ar 1 to Ar 3 has a -Q-SO 2 Ra group or a -Q-CORb group as a substituent; Ra and Rb each independently represents an alkyl group or an aryl group; Q represents an oxygen atom or —N(Ry)-; Ry represents a hydrogen atom, an alkyl group, or a cycloalkyl group; X represents a single bond or a divalent linking group; and Y represents a sulfonate anion, a bis(alkylsulfonyl)-amide anion, or a tris(alkylsulfonyl) methide anion; and,

(B) a resin capable of decomposing by the action of an acid to increase the solubility in an alkali developer.

2. A photosensitive composition as claimed in claim 1 , wherein Ar 3 in formula (I) represents a benzene ring having at least one of a -Q-SO 2 Ra group and a -Q-CORb group as a substituent.

3. The photosensitive composition as claimed in claim 1 , wherein the resin (B) has a hydroxystyrene structural unit.

4. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains a repeating unit having a monocyclic or polycyclic hydrocarbon structure.

5. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains a repeating unit having an alcoholic hydroxyl group.

6. The photosensitive composition as claimed in claim 5 , wherein the repeating unit having an alcoholic hydroxyl group is a repeating unit having at least one structure selected from the group consisting of a monohydroxy-adamantane structure, a dihydroxyadamantane structure, and a trihydroxyadamantane structure.

7. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains a repeating unit having a lactone structure.

8. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains at least one methacrylate repeating unit and at least one acrylate repeating unit.

9. The photosensitive composition as claimed in claim 1 , which further comprises at least one of (F) a basic compound and (G) a surfactant, wherein (G) is a fluorine surfactant or a silicon surfactant.

10. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains: at least one repeating unit selected from 2-alkyl-2-adamantyl(meth)acrylate and dialkyl(1-adamantyl)methyl(meth)acrylate, wherein the alkyl group is a straight chain or branched alkyl group having from 1 to 4 carbon atoms; at least one repeating unit having a lactone structure; and at least one repeating unit having two or more hydroxyl groups.

11. The photosensitive composition as claimed in claim 10 , wherein the resin (B) further contains a repeating unit having a carboxyl group.

12. The photosensitive composition as claimed in claim 1 , wherein the resin (B) contains: at least one repeating unit selected from 2-alkyl-2-adamantyl(meth)acrylate and dialkyl(1-adamantyl)methyl (meth)acrylate; and at least one repeating unit having a hydroxystyrene structure.

13. A pattern-forming method comprising: forming a photosensitive film with the photosensitive composition as claimed in claim 1 ; and exposing and developing the photosensitive film.

14. A photosensitive composition comprising:

(A) a compound represented by the following formula (I):

 wherein

Ar 1 and Ar 2 each independently represents an aromatic ring having from 6 to 20 carbon atoms, and

Ar 3 is an optionally substituted benzene ring, wherein the substituent is selected from the group consisting of a straight chain, branched or cyclic alkyl group having from 1 to 6 carbon atoms, an alkoxy group having from 1 to 6 carbon atoms, an acyl group having from 1 to 6 carbon atoms, a cyano group, a nitro group, a halogen group, a -Q-SO 2 Ra group and a -Q-CORb group, and

wherein at least one of Ar 1 to Ar 3 has a -Q-SO 2 Ra group or a -Q-CORb group as a substituent; Ra and Rb each independently represents an alkyl group or an aryl group; Q represents an oxygen atom or —N(Ry)-; Ry represents a hydrogen atom, an alkyl group, or a cycloalkyl group; X represents a single bond or a divalent linking group; and Y represents a sulfonate anion, a carboxylate anion, a bis(alkylsulfonyl)-amide anion, or a tris(alkylsulfonyl) methide anion;

(D) a resin soluble in an alkali developer; and

(E) an acid crosslinking agent capable of crosslinking with the resin soluble in an alkali developer by the action of an acid.

15. The photosensitive composition as claimed in claim 14 , which further comprises at least one of (F) a basic compound and (G) a surfactant, wherein (G) is a fluorine surfactant or a silicon surfactant.