Sulfonate and its derivative, photosensitive acid generator, and resist composition and patterning process using the same
申请人:Shin-Etsu Chemical Co., Ltd.
公开号:US08283104B2
公开(公告)日:2012-10-09
There is disclosed a sulfonate shown by the following general formula (2).
R1—COOC(CF3)2—CH2SO3−M+ (2)
(In the formula, R1 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.
本发明公开了一种磺酸盐,其通式如下(2)所示。R1-COOC(CF3)2-CH2SO3-M+ (2)(其中,R1代表具有1至50个碳原子的线性、支链或环状单价碳氢基团,可选含有杂原子。M+代表阳离子。)可以提供:一种新型的磺酸盐,其对于具有足够高的可溶性(相容性)在抗蚀剂溶剂和树脂中具有高效性,具有良好的储存稳定性、PED稳定性、更广泛的焦点深度、良好的灵敏度,特别是高分辨率和良好的图案轮廓形状的化学放大抗蚀剂组成物;一种光敏酸发生剂;使用此种组成物的抗蚀剂组成物;光掩膜空白和图案化过程。