Patent ID: 11947257
Assignee: SUMITOMO CHEMICAL COMPANY LIMITED
Field: Optics (Instruments)
Classification: CPC G  C | IPC C  G

Claim 0:
1. A resist composition comprising:
an acid generator,
a resin having an acid-labile group, and
a salt generating a carboxylic acid having an acidity lower than that of an acid generated from the acid generator,
wherein the acid generator comprises a salt represented by formula (I), and the resin having an acid-labile group includes a structural unit represented by formula (a2-A):, , wherein, in formula (I),
Q1 and Q2 each independently represent a fluorine atom or a perfluoroalkyl group having 1 to 6 carbon atoms,
R1 and R2 each independently represent a hydrogen atom, a fluorine atom or a perfluoroalkyl group having 1 to 6 carbon atoms,
z represents an integer of 0 to 6 and when z is 2 or more, a plurality of R1 and R2 may be the same or different from each other,
X1 represents *—CO—O—, *—O—CO—, *—O—CO—O— or *—O—, and * represents a bonding site to C(R1) (R2) or C(Q1) (Q2),
L1 represents a single bond or an alkanediyl group having 1 to 6 carbon atoms,
A1 represents a divalent alicyclic saturated hydrocarbon group having 3 to 36 carbon atoms which may have a substituent, and —CH2—included in the alicyclic saturated hydrocarbon group may be replaced by —O—, —S—, —CO— or —SO2—,
L2 represents a single bond, a carbonyl group or an alkanediyl group having 1 to 6 carbon atoms,
A2 represents a divalent saturated hydrocarbon group which is: (i) an alkanediyl group having 1 to 24 carbon atoms which may have a substituent, (ii) an alicyclic saturated hydrocarbon group having 3 to 24 carbon atoms which may have a substituent of a halogen atom, a cyano group, a carboxy group, an alkoxy group having 1 to 12 carbon atoms, or a group obtained by combining two or more of these groups, or (iii) a group formed by combining two or more of (i) and (ii),
R3, R4 and R5 each independently represent a saturated hydrocarbon group having 1 to 6 carbon atoms, and
Z+ represents an organic cation;, , wherein, in formula (a2-A),
Ra50 represents a hydrogen atom, a halogen atom or an alkyl group having 1 to 6 carbon atoms which may have a halogen atom,
Ra51 represents a halogen atom, a hydroxy group, an alkyl group having 1 to 6 carbon atoms, an alkoxy group having 1 to 6 carbon atoms, an alkylcarbonyl group having 2 to 4 carbon atoms, an alkylcarbonyloxy group having 2 to 4 carbon atoms, an acryloyloxy group or a methacryloyloxy group,
Aa50 represents a single bond or *—Xa51—(Aa52—Xa52)nb—,and * represents a bonding site to a carbon atom to which —Ra50 is bonded,
Aa52 represents an alkanediyl group having 1 to 6 carbon atoms,
Xa51 and Xa52 each independently represent —O—, −CO—O— or —O—CO—,
nb represents 0 or 1, and
mb represents an integer of 0 to 4, and when mb is an integer of 2 or more, a plurality of Ra51 may be the same or different from each other.