Patent ID: 6586163
Filing Date: 2003-07-01
Classification: G03F

Abstract:
A fine pattern formation method under which a fine pattern is formed by applying a photoresist over an underlying substrate, exposing the photoresist to light of a single wavelength so as to form a fine resist pattern, and etching the underlying substrate while the resist pattern is used as a mark, the method comprising the steps of:forming a silicon-nitride-based film directly on the underlying substrate or directly on one or more layers formed on the underlying substrate; forming a photoresist directly on the silicon-nitride-based film or directly on one or more layers formed on the silicon-nitride-based film; exposing the photoresist to light, to thereby transfer a mask pattern onto the photoresist; and etching the silicon-nitride-based film while the thus-transferred resist pattern is taken as a mask, wherein processing pertaining to the step of depositing the silicon-nitride-based film is effected by means of employing a plasma CVD system, the temperature at which the underlying substrate is to be situated is set so as to fall within the range of from 500 to 700Â° C.