Patent ID: 6268295
Filing Date: 2001-07-31
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising the steps of:forming a first film above a semiconductor substrate;introducing a reaction gas including a dilution gas into a reaction atmosphere;growing an antireflection film made of silicon nitride or silicon nitride oxide on said first film by a plasma chemical vapor deposition method in said reaction atmosphere;coating a resist above said antireflection film;patterning said resist via exposure and development;patterning said first film by etching an area of said first film not covered with said resist;removing said resist;forming side walls made of silicon nitride or silicon oxide on a side surface of said first film; andselectively removing said antireflection film by use of hydrofluoric acid wherein an etching rate of said antireflection film by use of said hydrofluoric acid can be adjusted by increasing or decreasing a flow rate of said dilution gas.