Light-emitting substrate with first functional sub-layer, display panel with first functional sub-layer, light-emitting equipment including light-emitting substrate, method and apparatus for manufacturing light-emitting substrate

A light-emitting substrate comprising:

• a base substrate;
• a pixel defining layer disposed on the base substrate, the pixel defining layer having a plurality of opening portions, and a part of the pixel defining layer except the plurality of opening portions having substantially a same thickness, with no step shape formed in the part of the pixel defining layer except the plurality of opening portions;
• a first electrode layer comprising a plurality of first electrodes, at least a part of each of the first electrodes being exposed to one of the opening portions and constituting an accommodating portion with the opening portion;
• and
• a light-emitting functional layer arranged on a side of the first electrode layer away from the base substrate, the light-emitting functional layer comprising a plurality of functional sub-layers, at least one of which is a first functional sub-layer, the first functional sub-layer comprising a plurality of functional patterns, each of the functional patterns being located in one of the accommodating portions and being conformal to a surface of the accommodating portion, and a distance from an edge, in a direction parallel to the base substrate, of the functional pattern to the base substrate being smaller than or equal to a distance from an edge, in the direction parallel to the base substrate, of the accommodating portion to the base substrate, and the functional pattern in its entirety does not extend beyond the accommodating portion,
• wherein a surface of the part of the pixel defining layer except the plurality of opening on a side away from the base substrate is an uneven surface, which is formed during a material removal assembly rolls across the pixel defining layer, such that the uneven surface forms fine and continuous pits on the pixel defining layer,
• wherein the surface of the part of the pixel defining layer except the plurality of opening on the side away from the base substrate has a plurality of strip-shaped grooves parallel to each other,
• wherein a cross-section of the strip-shaped groove is triangular.