Patent number: 9507259
Abstract: A photoresist composition comprises an acid-sensitive polymer, and a cyclic sulfonium compound having the formula: (Ra)1—(Ar)—S+(—CH2—)m·?O3S—(CRb2)n-(L)p-X wherein each Ra is independently a substituted or unsubstituted C1-30 alkyl group, C6-30 aryl group, C7-30 aralkyl group, or combination comprising at least one of the foregoing, Ar is a monocyclic, polycyclic, or fused polycyclic C6-30 aryl group, each Rb is independently H, F, a linear or branched C1-10 fluoroalkyl or a linear or branched heteroatom-containing C1-10 fluoroalkyl, L is a C1-30 linking group optionally comprising a heteroatom comprising O, S, N, F, or a combination comprising at least one of the foregoing heteroatoms, X is a substituted or unsubstituted, C5 or greater monocyclic, polycyclic or fused polycyclic cycloaliphatic group, optionally comprising a heteroatom comprising O, S, N, F, or a combination comprising at least one of the foregoing, and 1 is an integer of 0 to 4, m is an integer of 3 to 20, n is an integer of 0 to 4, and p
Type:
Grant
Filed:
May 29, 2012
Date of Patent:
November 29, 2016
Assignee:
ROHM AND HAAS ELECTRONIC MATERIALS LLC
Inventors:
Mingqi Li, Emad Aqad, Cong Liu, Ching-Lung Chen, Shintaro Yamada, Cheng-bai Xu, Joseph Mattia