Patent ID: 6140025
Filing Date: 2000-10-31
Classification: G03F

Abstract:
A method for forming a resist pattern which comprises(1) a step of applying a negative photosensitive resin composition onto a substrate to form a photosensitive film thereon,(2) a step of exposing the surface of the photosensitive film formed on the substrate to a laser beam directly or a light through a negative mask to cure the photosensitive film to obtain a desired image on the surface of the photosensitive film,(3) a step of subjecting the resulting photosensitive film to a developing treatment to form a resist pattern on the substrate,wherein at least one step of the steps (1) to (3) is carried out under the irradiation of a safelight which is given from a discharge lamp containing sodium as a main component; the negative photosensitive resin composition is a liquid or a solid resin composition containing a photocurable resin, a photoreaction initiator and, if necessary, a photosensitizing dye; and an absorbency of unexposed film formed from this composition being 0.5 or less within the range of the maximum wavelength .+-.30 nm selected from the range of the maximum wavelength of the safelight.