Patent ID: 9570715
Date: 2017-02-14
CPC Classifications: C23C,H01L,Y10T

Claim:
1. A mask supported by a frame, comprising: a mask main body in a band shape extending in a first direction, the mask main body having edges extending parallel to the first direction, the mask main body having ends extending perpendicular to the first direction, the ends of the mask main body being supported by the frame; a plurality of pattern openings formed in the mask main body; and a dummy opening provided between the pattern openings and one of the ends of the mask main body, the dummy opening including a first sub-dummy opening and a second sub-dummy opening, the second sub-dummy opening disposed between one of the edges of the mask main body and the first sub-dummy opening, wherein each of the first sub-dummy opening and the second sub-dummy opening has a rectangular shape having a longer side extending in the first direction.