Patent ID: 11881420
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A thermal treatment method for housing a substrate in a chamber and performing thermal treatment on the substrate, the thermal treatment method comprising the steps of:
(a) partitioning the chamber into an upper space and a lower space, with a support member attached to an inner wall surface of the chamber and extending along an inner peripheral direction of the chamber, and a plate quartz susceptor supported by the support member, wherein the upper space is defined to be a space surrounded by the upper chamber window of the chamber, the susceptor, and the support member, and the lower space is defined to be a space surrounded by the lower chamber window of the chamber, the susceptor, and the inner wall surface of the chamber;
(b) arranging continuously turned-on lamps below the chamber;
(c) arranging flash lamps above the chamber;
(d) supporting the substrate on the susceptor for housing the substrate in the upper space;
(e) supplying nitrogen gas from a first gas source to the lower space via a first tube;
(f) supplying reactive gas from a second gas source to the upper space via a second tube;
(g) preheating the substrate by irradiating, through the lower space, a back surface of the substrate with light from the continuously turned-on lamps arranged below the chamber;
(h) measuring a temperature of the back surface of the substrate by a radiation thermometer disposed below the susceptor; and
(i) turning on the flash lamps to irradiate a front surface of the substrate with flash light when the radiation thermometer detects that the temperature of the substrate has reached a predetermined preheating temperature.