Display Substrate, Display Device, Mask Plate, and Manufacturing Method

A manufacturing method for a display substrate, comprising:

• forming a pattern structure on a base substrate, wherein the base substrate comprises a first substrate portion and a second substrate portion adjacent to the first substrate portion, and the pattern structure is formed on the first substrate portion;
• forming a planarization layer on the base substrate, the planarization layer comprising a first planarization layer on the first substrate portion and a second planarization layer on the second substrate portion, wherein a projection of the first planarization layer on the base substrate at least partially covers a projection of the pattern structure on the base substrate, and a height from at least part of a surface of the first planarization layer on a side away from the base substrate to the base substrate is higher than a height from a surface of the second planarization layer on a side away from the base substrate to the base substrate;
• and
• removing a part of the first planarization layer so as to reduce a height difference between the height from the at least part of the surface of the first planarization layer on the side away from the base substrate to the base substrate and the height from the surface of the second planarization layer on the side away from the base substrate to the base substrate.