Mask assembly with surface roughened mask sheet at welding location, method of manufacturing the same, and method of manufacturing display device using the same
AssigneeSamsung Display Co., Ltd.
InventorsIn-Bae Kim, Minho Moon, Youngho Park, Sungsoon Im
Life of this patent
Estimating the term…
Abstract
Provided is a mask assembly including a mask sheet including a pattern part with at least one opening part, and a welding part connected to the pattern part, and a mask frame with the mask sheet mounted thereon and welded to the welding part. The mask sheet includes a first surface configured to fact the mask frame and a second surface opposite to the first surface. The welding part includes a hatching area in which a surface roughness of the second surface is larger than that of the second surface in the pattern part.
Claims18
A mask assembly comprising:
- a mask sheet comprising a pattern part with at least one opening part, and a welding part connected to the pattern part;
- and
- a mask frame on which the mask sheet is mounted, the mask frame being welded to the welding part of the mask sheet,
- wherein the mask sheet comprises a first surface facing the mask frame and a second surface opposite to the first surface,
- wherein the welding part comprises a hatching area, and a surface roughness of the second surface in the hatching area is larger than that of the second surface in the pattern part,
- wherein an arithmetical average roughness of the second surface in the hatching area is about 0.1 μm to about 0.2 μm, and
- wherein an arithmetical average roughness of the second surface in the pattern part is about 0 μm to about 0.05 μm.
A mask assembly comprising:
- a mask sheet comprising a pattern part with at least one opening part, and a welding part connected to the pattern part;
- and
- a mask frame on which the mask sheet is mounted, the mask frame being welded to the welding part of the mask sheet,
- wherein the mask sheet comprises a first surface facing the mask frame and a second surface opposite to the first surface,
- wherein the welding part comprises a hatching area, and a surface roughness of the second surface in the hatching area is larger than that of the second surface in the pattern part,
- wherein a ten-point roughness of the second surface in the hatching area is larger than that of the second surface in the pattern part.
A method of manufacturing a mask assembly, the method comprising:
- providing a base sheet comprising a provisional pattern part and a provisional welding part;
- providing a machining pattern to the provisional pattern part at a first surface of the base sheet;
- inverting the base sheet;
- performing a hatching process for providing a hatching area in the provisional welding part on a second surface of the base sheet opposite to the first surface to complete a mask sheet, the hatching area having a higher surface roughness than the provisional pattern part;
- and
- performing a welding process for irradiating the hatching area with a welding laser to fix the mask sheet to a mask frame.
A method of manufacturing a light emitting display device, which comprises a pixel comprising a light emitting element and a pixel driving circuit configured to drive the light emitting element, the method comprising:
- providing the pixel driving circuit on a base layer;
- and
- providing the light emitting element on the pixel driving circuit,
- wherein the providing of the light emitting element comprises:
- providing a first electrode;
- providing a light emission layer on the first electrode using a mask assembly;
- and
- providing a second electrode configured to face the first electrode on the light emission layer, and
- the mask assembly comprises:
- a mask sheet comprising a pattern part with at least one opening part, and a welding part connected to the pattern part;
- and
- a mask frame on which the mask sheet is mounted, the mask frame being welded to the welding part of the mask sheet,
- wherein the mask sheet comprises a first surface facing the mask frame and a second surface opposite to the first surface,
- wherein the welding part comprises a hatching area, and a surface roughness of the second surface in the hatching area is larger than that of the second surface in the pattern part,
- wherein the arithmetical average roughness of the second surface in the hatching area is about 0.1 μm to about 0.2 μm, and
- wherein the arithmetical average roughness of the second surface in the pattern part is about 0 μm to about 0.05 μm.
Dependencies are inferred from the claim text.