Patent ID: 9289798
Filing Date: 2016-03-22
CPC Classification: B05C,C23C,H01L

Claim Text:
1. A mask having both ends supported on a frame, said mask comprising: a mask main body unit having a length extending in a first direction and a width smaller than the length and extending in a second direction crossing the first direction; a plurality of pattern units disposed one after another in the first direction on the mask main body unit, each pattern unit including a plurality of pattern slits having a length extending in the first direction and a width smaller than the length and extending in the second direction; and two dummy units separated with respect to each other with the pattern units therebetween, each dummy unit including a plurality of dummy slits, each said dummy slit having a length extending in the first direction and a width smaller than the length and extending in the second direction; wherein a length extending in the first direction of a dummy slit disposed in an outer area of the dummy unit in the second direction from among the plurality of dummy slits is shorter than a length extending in the first direction of a dummy slit disposed in a center area of the dummy unit in the second direction.