Mask strips and method for manufacturing organic light emitting diode display using the same
A mask strip for manufacturing an organic light emitting diode (OLED) display is disclosed. In one aspect, the mask strip is extended in a length direction and fixed to a frame. The frame includes a plurality of masking pattern units arranged in a matrix format in which an opening pattern includes a plurality of rows that are substantially parallel to a width direction crossing the length direction and a plurality of columns that are substantially parallel to the length direction. The rows respectively have a curvature which is concave toward an inside of the masking pattern unit, and the columns respectively have a curvature which is convex toward an outside of the masking pattern unit.
1. A mask strip extended in a length direction and fixed to a frame, comprising:
a plurality of masking pattern units arranged in a matrix format, each masking pattern unit including a plurality of opening patterns arranged a plurality of rows that are substantially parallel to a width direction crossing the length direction and a plurality of columns that are substantially parallel to the length direction, wherein each of the masking pattern units has a center and edges,
wherein, for each non-center row and column, each of the rows has a curvature which is concave toward the center of the corresponding masking pattern unit, and wherein each of the columns has a curvature which is convex toward the edges of the corresponding masking pattern unit,
wherein the rows have a greater curvature when they are arranged farther from a center of the length direction of the masking pattern unit, and
wherein each of the plurality of opening patterns are formed to have the same, repeating shape.
2. The mask strip of claim 1 , wherein the rows have a lesser curvature when they are arranged nearer to the center of the length direction of the masking pattern unit.
3. The mask strip of claim 1 , wherein the columns have a lesser curvature when they are arranged nearer to a center of the width direction of the masking pattern units.
4. The mask strip of claim 1 , wherein each of the rows has a lesser curvature when they are arranged farther from the center of the corresponding masking pattern unit.
5. The mask strip of claim 1 , wherein each of the columns has a lesser curvature when they are arranged farther from the center of the corresponding masking pattern unit.
6. The mask strip of claim 1 , wherein each of the rows is substantially symmetric with respect to a center of the length direction of the masking pattern units.
7. The mask strip of claim 1 , wherein each of the columns is substantially symmetric with respect to a center of the width direction of the masking pattern units.
8. The mask strip of claim 1 , wherein the masking pattern units are arranged at substantially regular intervals in the length direction with a block area therebetween.
9. The mask strip of claim 1 , wherein a first plurality of openings are formed in the rows, wherein a second plurality of openings are formed in the columns, and wherein the first and second openings have the same size.