Patent ID: 11869763
Assignee: SEMES CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B | IPC B  H

Claim 7:
8. An apparatus for treating a substrate, the apparatus comprising:
a chamber defining an inner space;
a pedestal received in the inner space and configured to support the substrate;
a first laser irradiation unit configured to perform an edge bead removal (EBR) process by firing a first laser beam having a first wavelength to remove an exposed upper first layer of an organic film on an upper surface of the substrate that is supported on the pedestal; and
a second laser irradiation unit configured to perform the EBR process by firing a second laser beam having a second wavelength, different than the first wavelength, to remove a second layer of the organic film on the upper surface of the substrate that is supported on the pedestal,
wherein the first wavelength and the second wavelength are selected from among four wavelength ranges, a wavelength range of the first wavelength different from a wavelength range of the second wavelength, and
the four wavelength ranges include a first range of 750 nm to 1200 nm, a second range of 380 nm to 749 nm, a third range of 300 nm to 379 nm, and a fourth range of 150 nm to 299 nm.