Patent ID: 6730458
Filing Date: 2004-05-04
Classification: G03F,Y10S

Abstract:
A method of forming a fine pattern on a substrate comprising:forming a photoresist layer on the substrate, the photoresist being adapted for exposure by UV radiation of wavelength W1 and having a glass transition temperature Tg and a decomposition temperature Td; exposing portions of the photoresist layer with the UV radiation to form an exposed photoresist layer with exposed portions and unexposed portions; developing the exposed photoresist layer to form a first photoresist pattern, the first photoresist pattern having an opening having a critical dimension d1; and exposing the first photoresist pattern to VUV radiation of wavelength W2 thereby temporarily producing an effective glass transition temperature Tgeff wherein Tgeffg while simultaneously heating the first photoresist pattern to a temperature at or above the Tgeff to produce a second photoresist pattern in which the opening has a critical dimension d2, wherein d21.