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

Claim 3:
4. The resist composition according to claim 1, wherein the resin having an acid-labile group includes at least one selected from the group consisting of a structural unit represented by formula (a1-1) and a structural unit represented by formula (a1-2):, , wherein, in formula (a1-1) and formula (a1-2),
La1 and La2 each independently represent —O— or *—O—(CH2)k1—CO—O—, k1 represents an integer of 1 to 7, and * represents a bonding site to —CO—,
Ra4 and Ra5 each independently represent a hydrogen atom or a methyl group,
Ra6 and Ra7 each independently represent an alkyl group having 1 to 8 carbon atoms, an alicyclic hydrocarbon group having 3 to 18 carbon atoms, or a group obtained by combining these groups,
m1 represents an integer of 0 to 14,
n1 represents an integer of 0 to 10, and
n1′ represents an integer of 0 to 3.