Patent ID: 6190837
Filing Date: 2001-02-20
Classification: G03F

Abstract:
A method for forming a fine photoresist film pattern, comprising the steps of:coating a photoresist film on a layer to be etched and exposing a certain depth of the photoresist film through a mask to a light beam, said photoresist film comprising a resin, a photoacid generator and base;subjecting the photoresist film to post-exposure bake, to remove the base in the exposed region through the reaction of acid and base;silylating the photoresist film with a material containing a H--Si bond, to create a Si--O-resin bond in the unexposed region with the aid of a catalytic action of the base which remains therein but no Si--O-resin bond in the exposed region; andetching the exposed region of the photoresist film by use of plasma, said Si--O-resin contained in the unexposed region of the photoresist film combined with oxygen to form a silicon oxide which serves as an etch barrier.