SALT AND PHOTORESIST COMPOSITION CONTAINING THE SAME
申请人:ICHIKAWA Koji
公开号:US20100304293A1
公开(公告)日:2010-12-02
A salt represented by the formula (a):
wherein Q
1
and Q
2
each independently represent a fluorine atom etc.,
X
1
represents a single bond etc.,
X
2
represents a single bond etc.,
Y
1
represents a C3-C6 alicyclic hydrocarbon group etc., with the proviso that —X
2
—Y
1
group has one or more fluorine atoms, and
Z
+
represents an organic counter cation, and a photoresist composition comprising the salt represented by the formula (a) and a resin comprising a structural unit having an acid-labile group and being insoluble or poorly soluble in an aqueous alkali solution but becoming soluble in an aqueous alkali solution by the action of an acid.
A salt represented by the formula (I0):
wherein Q
1
and Q
2
each independently represent a fluorine atom or a C1-C6 perfluoroalkyl group, L
1
represents a divalent C1-C17 hydrocarbon group in which one or more —CH
2
— can be replaced by —O— or —CO—, m represents 1 or 2, and Z
m+
represents m-valent organic or inorganic cation.
Chemically amplified photoresist composition and method for forming resist pattern
申请人:Ichikawa Koji
公开号:US08883394B2
公开(公告)日:2014-11-11
The present invention provides a resist composition giving a resist pattern excellent in CD uniformity and focus margin. A chemically amplified photoresist composition comprises a resin (A) and an acid generator (B), and the resin (A) contains, as a part or an entirety thereof, a copolymer (A1) which is obtained by polymerizing at least: a (meth)acrylic monomer (a1) having C5-20 alicyclic hydrocarbon group which becomes soluble in an aqueous alkali solution by the action of an acid; a (meth)acrylic monomer (a2) having a hydroxy group-containing adamantyl group; and a (meth)acrylic monomer (a3) having a lactone ring, and the copolymer (A1) has a weight-average molecular weight of 2500 or more and 5000 or less, and a content of the copolymer (A1) is not less than 50 parts by mass with respect to 100 parts by mass of the resin (A).