Deposition mask and method of manufacturing the deposition mask
A method of manufacturing a deposition mask includes preparing a mask-target substrate which has one surface on which a sacrificed layer pattern is formed and comprises a cover area covered by the sacrificed layer pattern and a plurality of exposed areas exposed by the sacrificed layer pattern; forming holes in the exposed areas of the mask-target substrate by emitting laser toward the mask-target substrate; and removing the sacrificed layer pattern, wherein the sacrificed layer pattern has a higher reflectance with respect to the laser than a reflectance of the mask-target substrate.
1. A method of manufacturing a deposition mask, the method comprising:
preparing a mask-target substrate which has a surface, on which a patterned sacrificed layer is provided, and comprises a cover area covered by the patterned sacrificed layer and a plurality of exposed areas exposed by the patterned sacrificed layer;
forming holes in the exposed areas of the mask-target substrate by emitting a laser toward the mask-target substrate; and
removing the patterned sacrificed layer,
wherein a reflectance of the patterned sacrificed layer with respect to the laser is higher than a reflectance of the mask-target substrate with respect to the laser.
2. The method of claim 1 , wherein the preparing the mask-target substrate comprises providing the patterned sacrificed layer such that the cover area of the mask-target substrate completely surrounds each of the exposed areas of the mask-target substrate.
3. The method of claim 2 , wherein the forming the holes in the exposed areas of the mask-target substrate by emitting the laser toward the mask-target substrate comprises emitting the laser partially toward the cover area of the mask-target substrate.
4. The method of claim 3 , wherein the reflectance of the patterned sacrificed layer with respect to the laser is about 70% or greater.
5. The method of claim 4 , wherein the laser has a single-wavelength in a wavelength range from about 400 nanometers to about 600 nanometers.
6. The method of claim 3 , wherein the mask-target substrate comprises an Invar alloy which comprises nickel and iron.
7. The method of claim 6 , wherein the patterned sacrificed layer comprises at least one of aluminum, silver, and magnesium.
8. The method of claim 1 , wherein the removing the patterned sacrificed layer is performed using a first etchant.
9. The method of claim 8 , wherein an etching rate of the first etchant with respect to the patterned sacrificed layer is higher than an etching rate thereof with respect to the mask-target substrate.
10. The method of claim 1 , wherein after the laser is emitted toward the mask-target substrate, dust oxide films are formed on an inner surface of the cover area, which faces the exposed area, and side surfaces and an upper surface of the patterned sacrificed layer.
11. The method of claim 10 , wherein the removing the patterned sacrificed layer comprises removing the dust oxide films formed on the side surfaces and the upper surface of the patterned sacrificed layer.
12. The method of claim 11 , wherein the removing the patterned sacrificed layer comprising the removing the dust oxide films, which are formed on the side surfaces and the upper surface of the patterned sacrificed layer, is performed within 30 minutes.
13. The method of claim 12 , further comprising:
removing, after the patterned sacrificed layer is removed, the dust oxide film formed on the inner surface of the cover area which faces the exposed area.
14. The method of claim 13 , wherein the removing the dust oxide film formed on the inner surface of the cover area which faces the exposed area is performed using a second etchant which is different from a first etchant, which is used for the removing the patterned sacrificed layer.
15. The method of claim 1 , wherein the providing the patterned sacrificed layer on the surface of the mask-target substrate is performed using at least one of a photolithography process, an electroplating process, and a sputtering process.