Patent ID: 6159783
Filing Date: 2000-12-12
Classification: H01L,Y10S

Abstract:
A method of manufacturing an MOS transistor, comprising the steps of:forming a gate insulating film and a gate electrode on a main surface of a semiconductor substrate;forming an oxide film on a surface of said gate electrode and on an exposed surface of said semiconductor substrate with a CVD method;forming a polysilicon layer on a surface of said oxide film;implanting nitrogen ions into said polysilicon layer through a surface of said polysilicon layer;diffusing nitrogen implanted into said polysilicon layer into said oxide film; andremoving said polysilicon layer, and then etching said oxide film into which nitrogen is implanted to form a sidewall oxide film in contact with a side surface of said gate electrode, a side surface of said gate insulating film, and the main surface of said semiconductor substrate.