POLYMERIZABLE ANION-CONTAINING SULFONIUM SALT AND POLYMER, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:OHASHI Masaki
公开号:US20100099042A1
公开(公告)日:2010-04-22
A polymerizable anion-containing sulfonium salt having formula (1) is provided wherein R
1
is H, F, methyl or trifluoromethyl, R
2
, R
3
and R
4
are C
1
-C
10
alkyl, alkenyl or oxoalkyl or C
6
-C
18
aryl, aralkyl or aryloxoalkyl, or two of R
2
, R
3
and R
4
may bond together to form a ring with S, A is a C
2
-C
20
hydrocarbon group having cyclic structure, and n is 0 or 1. The sulfonium salt generates a very strong sulfonic acid upon exposure to high-energy radiation. A resist composition comprising a polymer derived from the sulfonium salt is also provided.
NOVEL PHOTOACID GENERATOR, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:OHASHI Masaki
公开号:US20090061358A1
公开(公告)日:2009-03-05
Photoacid generators generate sulfonic acids of formula (1a) or (1c) upon exposure to high-energy radiation.
R
1
—COOCH(CF
3
)CF
2
SO
3
+
H
+
(1a)
R
1
—O—COOCH(CF
3
)CF
2
SO
3
−
H
+
(1c)
R
1
is a C
20
-C
50
hydrocarbon group having a steroid structure. The photoacid generators are compatible with resins and can control acid diffusion and are thus suited for use in chemically amplified resist compositions.
SULFONIUM SALT, ACID GENERATOR, RESIST COMPOSITION, PHOTOMASK BLANK, AND PATTERNING PROCESS
申请人:OHASHI Masaki
公开号:US20100143830A1
公开(公告)日:2010-06-10
A sulfonium salt has formula (1) wherein R
1
is a monovalent hydrocarbon group except vinyl and isopropenyl, R
2
, R
3
, and R
4
are alkyl, alkenyl, oxoalkyl, aryl, aralkyl or aryloxoalkyl or may bond together to form a ring with the sulfur atom, and n is 1 to 3. A chemically amplified resist composition comprising the sulfonium salt is capable of forming a fine feature pattern of good profile after development due to high resolution, improved focal latitude, and minimized line width variation and profile degradation upon prolonged PED.
PHOTOACID GENERATOR, RESIST COMPOSITION, AND PATTERNING PROCESS
申请人:Ohashi Masaki
公开号:US20110003247A1
公开(公告)日:2011-01-06
The photoacid generator produces a sulfonic acid which has a bulky cyclic structure in the sulfonate moiety and a straight-chain hydrocarbon group and thus shows a controlled acid diffusion behavior and an adequate mobility. The PAG is fully compatible with a resin to form a resist composition which performs well during the device fabrication process and solves the problems of resolution, LWR, and exposure latitude.
NOVEL SULFONATE AND ITS DERIVATIVE, PHOTOSENSITIVE ACID GENERATOR, AND RESIST COMPOSITION AND PATTERNING PROCESS USING THE SAME
申请人:OHASHI Masaki
公开号:US20100209827A1
公开(公告)日:2010-08-19
There is disclosed a sulfonate shown by the following general formula (2).
R
1
—COOC(CF
3
)
2
—CH
2
SO
3
−
M
+
(2)
(In the formula, R
1
represents a linear, a branched, or a cyclic monovalent hydrocarbon group having 1 to 50 carbon atoms optionally containing a hetero atom. M
+
represents a cation.) There can be provided: a novel sulfonate which is effective for a chemically amplified resist composition having a sufficiently high solubility (compatibility) in a resist solvent and a resin, a good storage stability, a PED stability, a further wider depth of focus, a good sensitivity, in particular a high resolution and a good pattern profile form; a photosensitive acid generator; a resist composition using this; a photomask blank, and a patterning process.