Patent ID: 11946470
Assignee: EBARA CORPORATION
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  G  Y | IPC F  G

Claim 20:
21. A substrate processing apparatus comprising a chamber film forming furnace configured to introduce a film forming gas to form a substrate, a vacuum pump apparatus configured to communicate with the chamber film forming furnace, an abatement apparatus configured to process exhaust gas of the vacuum pump, and a control apparatus configured to control the vacuum pump, and continuously processing a plurality of substrates,
wherein the control apparatus has a generation circuit configured to divide a past target state quantity of a target vacuum pump or a past target state quantity of another vacuum pump read from a storage apparatus into each process based on the film formation start timing included in a film formation start signal input from the abatement apparatus as a starting point after starting the vacuum pump to make the chamber film forming furnace into a predetermined degree of vacuum, and generate the divided target state quantity, and
a determination circuit configured to determine a normal variation range of a target state quantity which is a state quantity varying depending on a load of gas flowing into the vacuum pump for each divided target state quantity,
wherein the determination circuit corrects the past target state quantity based on a pressure in the target vacuum pump or a pressure in the other vacuum pump, and determines the normal variation range or the normal time variation behavior using the corrected past target state quantity.