The invention provides a high molecular weight silicone compound comprising recurring units of formula (1) and having a weight average molecular weight of 1,000-50,000. Some or all of the hydrogen atoms of carboxyl groups or carboxyl and hydroxyl groups in the silicone compound may be replaced by acid labile groups.
1
Z is a di- to hexavalent, non-aromatic, monocyclic or polycyclic hydrocarbon or bridged cyclic hydrocarbon group; Z is a di- to hexavalent, normal or branched hydrocarbon group or non-aromatic, monocyclic or polycyclic hydrocarbon or bridged cyclic hydrocarbon group; x, y and z are integers of 1-5 corresponding to the valence of Z and Z; R
1
is —OCHR—R—OH or —NHCHR—R—OH; R
2
is alkyl or alkenyl or a monovalent, non-aromatic, polycyclic hydrocarbon or bridged cyclic hydrocarbon group; p1, p2, p3 and p4 are 0 or positive numbers. A resist composition comprising the high molecular weight silicone compound as a base resin is sensitive to actinic radiation and has a high sensitivity and resolution so that it is suitable for microfabrication with electron beams or deep WV. Since the composition has low absorption at the exposure wavelength of an ArF or KrF excimer laser, a finely defined pattern having walls perpendicular to the substrate can be readily formed.
本发明提供了一种由式(1)的重复单元组成的高分子量
有机硅化合物,其重量平均分子量为 1,000-50,000 。
有机硅化合物中羧基或羧基和羟基的部分或全部氢原子可被酸性基团取代。
1
Z 是二至六价、非芳香族、单环或多
环烃类或桥接
环烃类基团; Z 是二至六价、正态或支链烃类基团或非芳香族、单环或多
环烃类或桥接
环烃类基团; x、y 和 z 是对应于 Z 和 Z 的价数的 1-5 的整数; R
1
是-OCHR-R-OH 或-NHCHR-R-OH; R
2
是烷基或烯基或单价、非芳香族、多
环烃或桥
环烃基团;p1、p2、p3 和 p4 是 0 或正数。由高分子量
有机硅化合物作为基础
树脂的抗蚀剂组合物对阳极辐射敏感,具有高灵敏度和高分辨率,因此适用于使用电子束或深 WV 进行微细加工。由于该组合物在 ArF 或 KrF 准分子激光的曝光波长下具有低吸收性,因此可以很容易地形成具有垂直于基底壁的精细图案。