Patent ID: 6699646
Filing Date: 2004-03-02
Classification: G03F,Y10S

Abstract:
A method for forming a resist pattern which comprises:(1) a step of applying a positive type photosensitive resin composition onto a substrate to form a photosensitive film thereon, (2) a step of exposing the photosensitive film formed on the substrate to a laser beam having an oscillation line at 488 nm or 532 nm directly or through a mask film so that a desired resist pattern (an image) may be obtained on the photosensitive film, and (3) a step of subjecting the resist film to a developing treatment to form the resist pattern on the substrate, wherein absorbancy of an unexposed film formed from the positive type photosensitive resin composition is 0.5 or less within the range of a maximum wavelength Â±30 nm selected in the range of the maximum wavelength of a safelight; and at least one step of the steps (1) to (3) is carried out under the irradiation circumstance of the safelight given from a discharge lamp containing sodium as a main component (which consists mainly of a D-ray having a light wavelength of 589 nm).