Patent ID: 11923213
Assignee: SEMES CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC H  B  G | IPC B  G  H

Claim 1:
2. The substrate heating unit of claim 1,
wherein the beam shaper comprises:
a lens assembly configured to divide the first laser beam into a plurality of laser beams; and
a condensing lens configured to converge the plurality of laser beams on the substrate,
wherein the lens assembly is disposed between the laser generator and the condensing lens,
wherein the lens assembly includes a first lens array and at least one second lens array,
wherein the first lens array and the at least one second lens array are positioned such that an optical axis of the first lens array and an optical axis of the at least one second lens array are aligned with each other,
wherein the first lens array is positioned at a fixed position and is closer to the laser generator than the at least on second lens array, and
wherein the at least one second lens array is configured to be movable along the optical axis of the first lens array to generate the second laser beam having a circular shape with a diameter which is substantially the same as a diameter of the substrate.