| 摘要 |
The present invention relates to a metal mask for preventing defect of an organic light emitting layer which comprises a plurality of transmissive areas formed on an area corresponding to a blocking area and a panel area formed on a mother substrate; a first alignment groove aligned with a first alignment mark formed on a corner of the mother substrate by being formed on the blocking area; and a second alignment groove aligned with a second alignment mark formed on the panel area of the mother substrate by being formed on each of the transmissive areas. |
