Patent ID: 11965244
Assignee: WONIK IPS CO., LTD
Field: Surface technology, coating (Chemistry)
Classification: CPC C  H | IPC C  H

Claim 10:
11. A substrate processing method using a substrate processing apparatus which comprises a chamber configured to form a processing space for substrate processing, a substrate support installed in the chamber to support a substrate, a gas sprayer installed above the substrate support to spray a gas for performing processes, and a vent configured to vent a gas of the processing space and comprising a valve for controlling a pressure, wherein the chamber comprises: an outer tube which has a protection space formed therein and a first inlet formed in a lower portion thereof; and an inner tube which has the processing space formed therein and a second inlet formed in a lower portion thereof, wherein a portion of the inner tube is accommodated in the outer tube, and a portion of the inner tube, in which the second inlet is formed, protrudes to the outside of the outer tube,
wherein the substrate processing method does not include impurity concentration detection and comprises a pressure changing operation repeated at least one time,
wherein the pressure changing operation comprises:
a pressurizing operation of increasing an internal pressure of the inner tube from a first pressure to a second pressure higher than the atmospheric pressure, by injecting a process gas into the processing space; and
a depressurizing operation of decreasing the internal pressure of the inner tube from the second pressure higher than the atmospheric pressure to a third pressure,
wherein a process gas-supplying flow rate to the inner tube in the depressurizing operation is lower than a process gas-supplying flow rate to the inner tube in the pressurizing operation, and
the third pressure is equal to or less than the atmospheric pressure.