The present invention provides an organic anti-reflection coating composition comprising a copolymer represented by the following Formula 1, a light absorbent, a thermal acid generating agent, and a curing agent:
wherein R
1
, R
2
and R
3
are each independent to each; R
1
represents hydrogen or an alkyl group having 1 to 10 carbon atoms; R
2
represents hydrogen, an alkyl group having 1 to 10 carbon atoms or an arylalkyl group having 1 to 20 carbon atoms; R
3
is hydrogen or a methyl group; m and n are repeating units in the main chain, while m+n=1, and they have values of 0.05