Patent ID: 6605521
Filing Date: 2003-08-12
Classification: H01L

Abstract:
A method of forming an oxide film on a gate structure side wall, comprising the steps of:successively forming an insulating film, a conductor layer, and a metal silicide layer on a semiconductor substrate, forming a gate structure including a gate insulating film, a gate conductor layer, and a gate silicide layer by etching the conductor layer and the metal silicide layer; placing said substrate in a rapid thermal processing furnace; and, forming an oxide film on the side wall of the gate structure, using a rapid thermal processing technology, by forming a thin oxide film on the side wall of the gate structure by the heat treatment of the entire substrate of the gate structure with a first heat treatment condition followed by the heat treatment of the entire substrate with a second heat treatment condition to thicken the thin oxide film, wherein the first heat treatment condition is a low-temperature annealing process and the second heat treatment is a high-temperature annealing process, and wherein the first heat treatment condition includes an inert atmosphere containing oxygen and the second heat treatment condition includes an active atmosphere.