Patent ID: 11915930
Assignee: SCREEN HOLDINGS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A substrate processing method of removing a resist that has a hardened layer from a front surface of a substrate, the substrate processing method comprising:
a hardened-layer removing step of removing the hardened layer by generating an oxygen radical near the front surface of the substrate, the hardened-layer removing step including a heating step of heating the substrate to 150° C. or more and an ozone-gas supplying step of supplying an ozone gas to the front surface of the substrate being heated by the heating step; and
a wet processing step of removing the resist from the front surface of the substrate by supplying a processing liquid including a sulfuric acid to the front surface of the substrate after the hardened-layer removing step, wherein
the heating step is performed by placing the substrate on a hot plate disposed in a thermal processing chamber, and
the ozone-gas supplying step is performed by introducing the ozone gas into the thermal processing chamber,
the substrate processing method further comprising a high-temperature inert gas supplying step of introducing an inert gas having a temperature of 150° C. or more into the thermal processing chamber after finishing the hardened-layer removing step by stopping the ozone-gas supplying step, and a room-temperature-inert-gas supplying step of introducing a room-temperature inert gas into the thermal processing chamber after the high-temperature inert gas supplying step.