Patent ID: 11901200
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of irradiating a substrate with light to heat the substrate, thereby forming an oxide film, said method comprising the steps of:
(a) putting a substrate into a chamber;
(b) irradiating said substrate with light to heat said substrate; and
(c) supplying an oxidizing gas into said chamber to change an atmosphere within said chamber from an inert gas atmosphere to an oxidizing atmosphere when the temperature of said substrate reaches a predetermined switching temperature in the course of said step (b), wherein
the supply of said oxidizing gas into said chamber is stopped and hydrogen gas is supplied into said chamber after the completion of said step (b) while the pressure within the chamber is reduced.