A polymer comprising recurring units containing silicon and recurring units having a substituent group of formula (1) is novel wherein A
1
is a divalent group selected from furandiyl, tetrahydrofurandiyl and oxanorbornanediyl, R
1
and R
2
are selected from monovalent C
1
-C
10
hydrocarbon groups, or R
1
and R
2
taken together may form an aliphatic hydrocarbon ring with the carbon atom, and R
3
is hydrogen or a monovalent C
1
-C
10
hydrocarbon group which may contain a hetero atom. The polymer is useful as a base resin to formulate a resist composition which is sensitive to high-energy radiation, and has excellent sensitivity and resolution at a wavelength of less than 300 nm as well as satisfactory oxygen plasma etching resistance.
一种由含
硅的递归单元和具有式(1)取代基团的递归单元组成的新型聚合物,其中 A
1
是选自
呋喃二基、
四氢呋喃二基和氧杂降
冰片二基的二价基团,R
1
和 R
2
选自一价 C
1
-C
10
烃基,或 R
1
和 R
2
可与碳原子形成一个脂族烃环,而 R
3
是氢或一价 C
1
-C
10
烃基,其中可能含有一个杂原子。这种聚合物可用作基础
树脂,用于配制对高能辐射敏感的抗蚀剂组合物,在波长小于 300 纳米时具有优异的灵敏度和分辨率,以及令人满意的抗氧等离子刻蚀性。