CPC C23C 16/042 (2013.01) [B05C 21/005 (2013.01)] | 11 Claims |
1. A mask frame comprising:
a first horizontal portion;
a second horizontal portion disposed under the first horizontal portion;
at least one vertical portion connecting the first horizontal portion and the second horizontal portion; and
a tensile bar coupled to the first horizontal portion, and
wherein the tensile bar is configured to apply a contraction force to the first horizontal portion in a longitudinal direction of the tensile bar.
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