Patent ID: 8545631

Claim:
A mask device comprising: at least one mask alignment mark on a mask; a blocking region on the mask for blocking deposited material; and an aperture region on the mask through which the deposited material passes, wherein the at least one mask alignment mark is outside the aperture region, the aperture region has a stripe pattern, the mask has a thickness of 0.5-1 mm, and a roll direction of a substrate on which the mask is formed is substantially parallel to a longitudinal direction of the stripe pattern to form the aperture region to have individual stripes in the stripe pattern each with a degree of straightness of 6 μm or less relative to a straight line; and wherein the roll direction of the substrate on which the mask is formed and the longitudinal direction of the stripe pattern are also substantially parallel to a longitudinal direction of at least one scribe line for dividing the mask.