Mask assembly and organic light emitting display device manufactured using the same
A mask assembly and an organic light emitting display device manufactured using the mask assembly are capable of realizing an organic light emitting display device having a hole in a display area, the mask assembly including a frame defining a first opening area, a first mask on the frame and defining a plurality of second opening areas that overlap the first opening area, and a second mask fixed to the frame across the plurality of second opening areas, and including a body portion overlapping the first mask, a blocking portion at each respective one of the second opening areas, and a pattern portion between the body portion and the blocking portion, and defining a plurality of holes.
1. A mask assembly comprising:
a frame defining a first opening area;
a first mask on the frame and defining a plurality of second opening areas that overlap the first opening area; and
a second mask fixed to the frame, crossing the plurality of second opening areas, extending in a first direction, and comprising:
a body portion overlapping the first mask;
a blocking portion overlapping each respective one of the second opening areas; and
a pattern portion between the body portion and the blocking portion, and defining a plurality of holes,
wherein a length of the blocking portion of the second mask is smaller than a length of each corresponding one of the second opening areas of the first mask in the first direction, and
wherein a width of the blocking portion of the second mask is smaller than a width of each corresponding one of the second opening areas of the first mask in a second direction perpendicular to the first direction.
2. The mask assembly of claim 1 , wherein the second mask extends in a lengthwise direction of the first mask.
3. The mask assembly of claim 1 , wherein the second mask extends in a widthwise direction of the first mask.
4. The mask assembly of claim 1 , wherein the blocking portion has a width substantially equal to a width of the pattern portion.
5. The mask assembly of claim 1 , wherein the blocking portion and the pattern portion have an area in a range from about 1% to about 50% of an area of the second opening areas.
6. The mask assembly of claim 1 , wherein the plurality of holes have an area in a range from about 50% to about 80% of an area of the pattern portion.
7. The mask assembly of claim 1 , wherein the second mask has a thickness in a range from about 80 μm to about 300 μm.
8. The mask assembly of claim 1 , wherein a shape of each of the plurality of holes comprises one of a circle, an ellipse, or a polygon on a plane.
9. The mask assembly of claim 1 , wherein the frame defines a groove at a position overlapping the second mask, and
wherein a shape of the second mask is such that a portion of the second mask is configured to be inserted into the groove.
10. The mask assembly of claim 1 , wherein the second mask is bent at an end thereof to extend toward a side surface of the frame, and is fixed to the frame.
11. The mask assembly of claim 1 , wherein each of the first mask and the second mask comprises one of stainless steel (SUS), an invar alloy, nickel (Ni), cobalt (Co), a nickel alloy, or a nickel-cobalt alloy.