Patent ID: 6903030

Claim:
A heat-treating apparatus for a semiconductor process, comprising: a process chamber which accommodates a target substrate; a support member which is disposed in the process chamber and supports the target substrate; a heater which heats the target substrate accommodated in the process chamber; an exhaust system to evacuate an interior of the process chamber; and a supply system to supply a process gas into the process chamber, wherein the supply system comprises, a combustor which is disposed outside the process chamber and has a combustion chamber, the combustor serving to generate water vapor by reaction of hydrogen gas and oxygen gas in the combustion chamber and supply the water vapor to the process chamber, a heating unit which is disposed outside the process chamber and has a heating chamber and a breathing resistance member disposed in and heated by the heating chamber, the heating unit serving to selectively heat a gas not passing through the combustion chamber to a temperature not lower than an activating temperature of the gas and supply the gas to the process chamber, and a gas distributor which selectively supplies hydrogen gas and oxygen gas to the combustion chamber and selectively supplies a reactive gas and inactive gas to the heating chamber, wherein the heating chamber is made of quartz, and a heating member is disposed to surround the heating chamber, the heating member comprising a heating resistor containing a small mount of metal impurities and an insulating sealing body for scaling the heating resistor.