Substrate processing apparatus and reaction tube for processing substrate

1. A substrate processing apparatus comprising:

a process chamber configured to accommodate a substrate and process the substrate, the process chamber comprising an alloy reaction tube made of a material comprising at least molybdenum (Mo) and cobalt (Co) and excluding aluminum (Al);

a heater configured to heat the substrate;

a gas supply part configured to supply a gas to an inside of the process chamber;

a quartz reaction tube installed in the alloy reaction tube; and

a purge gas supply part configured to supply a purge gas to a gap formed between the alloy reaction tube and the quartz reaction tube.

2. The substrate processing apparatus of claim 1 , further comprising:

a controller configured to perform a control operation such that hydrogen gas is supplied from the purge gas supply part to the gap as a purge gas when a film-forming gas is supplied from the gas supply part to the inside of the process chamber to process the substrate in the process chamber.

3. The substrate processing apparatus of claim 1 , wherein the purge gas supply part is installed at an upper end of the alloy reaction tube.

4. The substrate processing apparatus of claim 1 , further comprising:

an exhaust port installed in the quartz reaction tube such that the gap communicates with the process chamber.

5. The substrate processing apparatus of claim 1 , further comprising:

a member made of silicon carbide installed at an upper part of an inner wall of the quartz reaction tube.

6. The substrate processing apparatus of claim 1 , wherein a plurality of the process chamber is vertically installed in multiple stages, and a preliminary heating chamber is installed next to a lowermost one of the plurality of the process chambers.

7. The substrate processing apparatus of claim 1 , wherein the material comprising:

at least molybdenum (Mo) and cobalt (Co) and excluding aluminum (Al) further comprises tungsten (W) and further excludes copper (Cu).