Patent ID: 8067146

Claim:
A method for forming a fine pattern in a semiconductor device, the method comprising the steps of: forming first photoresist patterns over a semiconductor substrate having an underlying layer; coating a pattern hardening coating agent over the first photoresist patterns, and then baking the pattern hardening coating agent at a temperature ranging from 150° C. to 300° C., wherein the hardening coating agent comprises an addition polymer consisting of a 2,2,3,4,4,4-hexafluorobutyl methacrylate repeating unit and a glycidyl methacrylate repeating unit, an organic solvent, and 2-hydroxycyclohexyl p-toluenesulfonate, to form a pattern hardening film; forming a second photoresist film over the pattern hardening film; and selectively exposing and developing the second photoresist film, thereby forming a second photoresist pattern to be defined between neighboring first photoresist patterns.