Patent ID: 7442258

Claim:
A mask for use during deposition of a luminescent layer of an organic electroluminescent device, the mask comprising: a plurality of holes aligned uniformly and in parallel to each other along an axis of the mask, wherein an entire inner circumferential edge of the plurality of holes is formed by first and second angled surfaces, and wherein each of the plurality of holes has a shape and a size corresponding to a pixel region of the organic electroluminescent device such that each of the plurality of holes is configured to block an adjacent sub-pixel area during deposition of an organic electroluminescent material during fabrication of an organic electroluminescent device; and a plurality of bridges, wherein one of the plurality of bridges extends between respective ends of adjacent holes of the plurality of holes, wherein a thickness of each of the plurality of bridges is less than a thickness of the mask in areas of the mask having no angled surface portions, wherein the first angled surface extends from an upper surface portion of the mask that defines its respective hole toward an interior portion of its respective hole, and the second angled surface extends from a distal end of the first angled surface to a lower surface portion of the mask that defines its respective hole.