Patent ID: 9708726
Date: 2017-07-18
CPC Classifications: C30B,H01L

Claim:
1. A silicon wafer heat treatment method comprising: placing a silicon wafer on a SiC jig and putting the silicon wafer into a heat treatment furnace; performing heat treatment on the silicon wafer in the heat treatment furnace in a first non-oxidizing atmosphere; reducing a temperature to a temperature at which the silicon wafer can be carried out of the heat treatment furnace; and carrying the silicon wafer out of the heat treatment furnace, wherein in the heat reduction step, after the temperature is reduced to the temperature at which the silicon wafer can be carried out of the heat treatment furnace, the first non-oxidizing atmosphere is switched to an atmosphere containing oxygen, an oxide film having a thickness of 1 to 10 nm is formed on a surface of the SiC jig in the atmosphere containing oxygen, and the atmosphere containing oxygen is then switched to a second non-oxidizing atmosphere.