Mask for thin film deposition and method of manufacturing OLED using the same

摘要

A mask (10) for thin film deposition used in forming an organic thin film or a conductive layer in an organic light emitting device is disclosed. In one embodiment, the mask (10) includes i) a base member (11), ii) a plurality of slits (13) configured to penetrate through the base member (10), wherein the plurality of slits (13) have a predetermined length and extend in a first direction, wherein the plurality of slits (13) comprise an outermost slit (14) positioned in an outermost in a second direction having a predetermined angle with respect to the first direction, and wherein the outermost slit (14) comprises two sub-slits separated from each other and iii) a rib supporting part (17) formed between and contacting the two sub-slits, wherein the rib supporting part (17) extends from a rib which is adjacent to the outermost slit.