NOVEL PHOTOACID GENERATOR, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:OHASHI Masaki
公开号:US20090274978A1
公开(公告)日:2009-11-05
Photoacid generators generate sulfonic acids of formula (1a) or (1b) upon exposure to high-energy radiation.
R
1
—COOCH
2
CF
2
SO
3
−
H
+
(1a)
R
1
—O—COOCH
2
CF
2
SO
3
−
H
+
(1b)
R
1
is a monovalent C
20
-C
50
hydrocarbon group of steroid structure which may contain a heteroatom. The bulky steroid structure ensures adequate control of acid diffusion. The photoacid generators are compatible with resins and suited for use in chemically amplified resist compositions.