An acetal compound of formula (1) is provided wherein R
1
is H, methyl or trifluoromethyl, R
2
is a monovalent C
1
-C
10
hydrocarbon group, R
3
and R
4
are H or a monovalent C
1
-C
10
hydrocarbon group, R
2
and R
3
may together form an aliphatic hydrocarbon ring, and X
1
is a single bond or a divalent C
1
-C
4
hydrocarbon group. A polymer comprising recurring units derived from the acetal compound is used as a base resin to formulate a resist composition which exhibits a high resolution when processed by micropatterning technology, especially ArF lithography.
提供了一个式为(1)的
缩醛化合物,其中R1为H、甲基或三
氟甲基,R2为一价的C1-C10烃基,R3和R4为H或一价的C1-C10烃基,R2和R3可能共同形成脂肪烃环,X1为单键或二价的C1-C4烃基。由这种
缩醛化合物衍生的重复单位构成的聚合物被用作基础
树脂,制备耐光刻蚀性能高的光刻胶组合物,特别适用于微细图案技术处理,尤其是ArF光刻技术。