Patent ID: 11934092
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Optics (Instruments)
Classification: CPC G  B  H | IPC B  G  H

Claim 10:
11. A laser annealing method performed on a reflective photomask, the laser annealing method comprising: preparing a reflective photomask including a pattern area, a non-pattern area surrounding the pattern area, and a border area between the pattern area and the non-pattern area; and irradiating a laser beam onto the border area of the reflective photomask to recess the border area, wherein the laser beam has a pulse shape, the method further comprising placing a reflective photomask on a stage; generating, by a laser source, the laser beam to irradiate the laser beam onto a beam shaper; shaping, by the beam shaper, the laser beam into a laser beam spot.