Patent ID: 7364837

Claim:
A method for forming a photoresist pattern, comprising the steps of: (a) coating a photoresist on the surface of an underlying layer formed on a semiconductor substrate to form a photoresist film; (b) soft-baking the photoresist film; (c) exposing the photoresist film to light; (d) post-baking the photoresist film; and (e) developing the photoresist film to form a photoresist pattern, wherein the method further comprises cleaning the photoresist film using a photoresist cleaning solution comprising H 2 O and a nonionic surfactant compound represented by Formula 1 after step (b) and before step (c) or after step (c) and before step (d): wherein R 1 and R 2 are independently H, C 1 -C 20 alkyl, C 5 -C 25 alkyl aryl or C 1 -C 10 ester; m is 1 or 2; n is an integer ranging from 10 to 300; and o is 0 or 1.