Polymer compound, photoresist composition including the polymer compound, and resist pattern formation method
申请人:Tokyo Ohka Kogyo Co., Ltd.
公开号:US07723007B2
公开(公告)日:2010-05-25
The present invention provides a polymer compound which can constitute a photoresist composition which is capable of having an excellent resolution, forming a fine pattern with a good rectangularity, obtaining favorable resist characteristics even when acid strength of a acid generated from an acid generator is weak, and having favorable sensitivity; a photoresist composition including the polymer compound; and a resist pattern formation method using the photoresist composition. The photoresist composition and the resist pattern formation method use the polymer compound including an alkali soluble group (i), wherein the alkali soluble group (i) is at least one substituent group selected from an alcoholic hydroxyl group, a carboxyl group, or a phenolic hydroxyl group, and the substituent group is protected by an acid dissociable, dissolution inhibiting group (ii) represented by a general formula (1):
—CH2—OCH2nR1 (1)
(wherein R1 represents a cycloaliphatic group which contains no more than 20 carbon atoms and may contain an oxygen atom, a nitrogen atom, a sulfur atom, or a halogen atom, and n represents 0 or an integer of 1 to 5).
本发明提供一种聚合物化合物,可构成一种光阻组合物,该光阻组合物具有优异的分辨率,形成良好的矩形细图案,即使酸发生器产生的酸强度较弱,也能获得良好的抗阻特性,并具有良好的灵敏度。光阻组合物包括该聚合物化合物;以及使用该光阻组合物的抗阻图案形成方法。光阻组合物和抗阻图案形成方法使用该聚合物化合物,包括碱溶性基团(i),其中碱溶性基团(i)是选择自醇基羟基、羧基或酚基的至少一种取代基团,并且所述取代基团由一种酸解离、溶解抑制基团(ii)保护,该基团由通式(1)表示:—CH2—OCH2nR1 (1)(其中R1表示不含有超过20个碳原子的环脂肪基团,可能含有氧原子、氮原子、硫原子或卤素原子,n表示0或1至5的整数)。