Organic light-emitting display devices, methods for manufacturing the same, and masks for making supporting members

A method for manufacturing an organic light-emitting device, comprising steps of:

• forming a pixel defining layer on a substrate, the pixel defining layer defining a plurality of pixel regions, the plurality of pixel regions comprising a plurality of first pixel regions, a plurality of second pixel regions, and a plurality of third pixel regions;
• forming supporting members at first junction regions between the first pixel regions, the second pixel regions, and the third pixel regions, the supporting members have a distribution density of 25 to 350 supporting members per square millimeter of the substrate;
• and
• forming at least one organic-light emitting diode comprising an anode, an organic light-emitting layer, and a cathode on the substrate;
• wherein each of the supporting members has a bottom portion facing the substrate, a top portion opposite to the bottom portion, and a side portion connecting the bottom portion and the top portion;
• an area of the bottom portion is smaller than or equal to an area of the first junction region;
• an area of the top portion is smaller than or equal to the area of the bottom portion;
• and a taper angle between a side face of the side portion and a bottom face of the bottom portion of the supporting member is from 20° to 80°.

An organic light-emitting device, comprising:

• a substrate;
• a pixel defining layer disposed on the substrate, the pixel defining layer defining a plurality of pixel regions, the plurality of pixel regions comprising a plurality of first pixel regions, a plurality of second pixel regions, and a plurality of third pixel regions;
• a plurality of supporting members disposed on the pixel defining layer, the supporting members being located at first junction regions between the first pixel regions, the second pixel regions, and third pixel regions;
• and
• at least one organic light-emitting diode disposed on the substrate, the organic light-emitting diode comprising an anode, an organic light-emitting layer, and a cathode;
• wherein the supporting members are configured such that top portions of the supporting members are unable to contact with edges of openings of a mask for forming the organic light emitting layer.