| 摘要 |
<p>A mask and its forming method are provided to prevent a bad pattern of an organic light emitting layer by forming an opening of a uniform width in a region corresponding to a light emitting region. A mask includes a first region(A1) corresponding to a light emitting region of a display device, a second region(A2) corresponding to a non-light emitting region around the light emitting region, and an opening(111) extending from the first region to the second region and formed in a slit shape. The opening has a first portion(112) positioned in the first region and formed in a through-hole shape, and a second portion(113) positioned in the second region and formed in a groove shape.</p> |
