DEPOSITION MASK USING A METAL SUBSTRATE

Embodiments of the present invention relate to a mask structure applicable to a deposition process for an organic light-emitting device, etc., and allow provision of a deposition mask comprising: a first surface and a second surface which are orthogonal in the thickness direction of a metal plate and face each other; and multiple unit holes which have a first surface hole and a second surface hole which pass through the first surface and the second surface and are in connection with each other, wherein the size variation of the first surface hole or the second surface hole between neighboring unit holes is controlled within 2%-10% on the basis of the size variation between optional unit holes, or the center of the first surface hole and the center of the second surface hole are arranged at a location where the centers do not coincide with each other on the basis of the surface of the first surface.