A metal mask substrate includes a metal obverse surface configured such that a resist is placed on the obverse surface. The obverse surface has a three-dimensional surface roughness Sa of less than or equal to 0.11 μm. The obverse surface also has a three-dimensional surface roughness Sz of less than or equal to 3.17 μm.

An opto-electronic device includes: a first electrode; an organic layer disposed over the first electrode; a nucleation promoting coating disposed over the organic layer; a nucleation inhibiting coating covering a first region of the opto-electronic device; and a conductive coating covering a second region of the opto-electronic device.

A pixel arrangement structure includes: first sub-pixels, second sub-pixels and third sub-pixels, all being not overlapped but being spaced apart. The third sub-pixels have a first symmetry axis and a second symmetry axis that are perpendicular to each other. The first symmetry axis extends through a geometric center of a respective first sub-pixel adjacent to a respective third sub-pixel of the plurality of third sub-pixels, intersects a first edge of the respective third sub-pixel at a first intersection point, and intersects a second edge of the adjacent respective first sub-pixel at a second intersection point. A distance between the first intersection point and the second intersection point is a minimum distance between the respective third sub-pixel and the respective first sub-pixel. The second symmetry axis is similarly configured with respect to a respective second sub-pixel and the respective third sub-pixel.

Provided are a display panel, an evaporation mask, a display device and a preparation method. A display region of the display panel includes multiple first sub-pixels and multiple second sub-pixels, and the multiple first sub-pixels and the multiple second sub-pixels have a same shape and a same size and are different in color; a pattern composed of the multiple first sub-pixels is at least partially consistent with a pattern composed of the multiple second sub-pixels, and mutually consistent patterns are staggered in a first direction, and denotes a staggered vector in the first direction; a non-display region includes a first offset mark A1 and a second offset mark A2, denotes a vector connecting a center of the first offset mark A1 and a center of the second offset mark A2, and the vector satisfies: =+; where denotes a first preset deviation.

A mask assembly includes: a mask frame; a mask supported by the mask frame, the mask including a plurality of pattern holes; and a magnetic part disposed on one surface of the mask. The magnetic part provides a magnetic force between the mask and a target substrate and improves an adhesion between the mask and the target substrate to prevent deposition defects.

One or more embodiments include a display apparatus including an opening, an apparatus for manufacturing the display apparatus, and a method of manufacturing the display apparatus capable of reducing generation of gas or foreign matter.

A mask includes a first mask that includes a first long side that extends in a first direction and a first short side that extends in a second direction that crosses the first direction and that includes a first edge portion, a first center portion, and a first welded portion, that are sequentially arranged in the first direction. The mask further includes a second mask that includes a second long side that extends in the first direction and a second short side that extends in the second direction and that includes a second welded portion, a second center portion, and a second edge portion, that are sequentially arranged in the first direction. The first welded portion is in contact with the second welded portion.

A display device, a mask assembly, and an apparatus for manufacturing the display device are provided. The display device may reduce glare and includes sub-pixels having accurate and precise patterns. The display device including a first sub-pixel having a quadrangular shape, a second sub-pixel facing a first side of the first sub-pixel, the second sub-pixel having a quadrangular shape, and a third sub-pixel facing the first side of the first sub-pixel and spaced apart from the second sub-pixel, the third sub-pixel having a quadrangular shape, where a distance from the first side of the first sub-pixel to the second sub-pixel and a distance from the first side of the first sub-pixel to the third sub-pixel are different from each other.

A method of manufacturing an organic light-emitting display apparatus includes: forming a lift-off layer on a substrate including a first electrode, the lift-off layer including a fluoropolymer; forming a pattern layer on the lift-off layer; etching the lift-off layer between patterns of the pattern layer by utilizing a first solvent to expose the first electrode; forming an organic functional layer on the first electrode and the pattern layer, the organic functional layer including an emission layer; removing remaining portions of the lift-off layer by utilizing a second solvent; and forming a second electrode on the organic functional layer.

Provided are a display device and a method of manufacturing the same. The display device includes a substrate; a pixel electrode on the substrate; a pixel-defining layer having a first opening exposing a central portion of the pixel electrode and a barrier portion defining the first opening; an auxiliary electrode on the barrier portion; an intermediate layer on the pixel electrode; and an opposite electrode on the intermediate layer and in electrical contact with the auxiliary electrode.