A fluorine-containing polymer prepared from at least a spacer group selected
from
the group consisting of ethylene, alpha-olefins, 1,1-disubstituted olefins,
vinyl alcohols, vinyl ethers, and 1,3-dienes; and a norbornyl radical containing
a functional group containing the structure: —C(Rf)(Rf)Orb
wherein Rf and Rf are the same or different fluoroalkyl
groups of from 1 to about 10 carbon atoms or taken together are (CF2)n
wherein n is an integer ranging from 2 to about 10 and Rb is a
hydrogen atom or an acid- or base-labile protecting group; r is an integer ranging
from 0-4. The fluorine-containing polymer has an absorption coefficient of less
than 4.0 mm-1 at a wavelength of 157 nm. These polymers are useful in
photoresist compositions for microlithography. They exhibit high transparency at
this short wavelength and also possess other key properties, including good plasma
etch resistance and adhesive properties.