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

Claim 0:
1. A laser annealing method performed on a reflective photomask, the laser annealing method comprising:
preparing a reflective photomask including a pattern area and a border area surrounding the pattern area; and
irradiating a laser beam onto the border area of the reflective photomask,
wherein the laser beam has a pulse shape,
irradiating of the laser beam comprises split-irradiating a plurality of laser beam spots onto the border area,
each of the plurality of laser beam spots is shaped using a beam shaper, and
an energy level of an edge portion of each of the plurality of laser beam spots is lower than that of a center portion of each of the plurality of laser beam spots.