Patent ID: 7494599

Claim:
A method for forming a fine pattern in a semiconductor device, the method comprising: forming a first polymer layer over an etch target layer, the first polymer layer including carbon; forming a second polymer layer over the first polymer layer, the second polymer layer including silicon; patterning the second polymer layer to have a first opening having a first width; oxidizing surfaces of the patterned second polymer layer; etching the first polymer layer using the patterned second polymer layer comprising the oxidized surfaces as a hard mask, the etched first polymer layer having a second opening having a second width, the second width being substantially the same as the first width; and etching the etch target layer using the patterned second polymer layer comprising the oxidized surfaces and the etched first polymer layer as a hard mask to define a third opening having a third width, the first, second, and third widths being substantially the same.