Display Substrate and Mask Plate Assembly

A mask plate assembly for forming a display substrate, the display substrate comprising a base substrate, and a pixel defining layer, a functional layer, a cathode layer and a covering layer which are sequentially stacked in a direction away from the base substrate, and the mask plate assembly comprising:

• a first mask plate for forming a functional layer, wherein a size of an opening of the first mask plate is determined by a size of a display area and a first minimum distance, the first minimum distance is a minimum distance between a boundary of the display area and a boundary of the functional layer in a direction from the display area to a non-display area and is determined by a first shadow width of the functional layer extending from the display area to the non-display area, and the first shadow width is a maximum value of a width of a shadow area formed in a preset area under a condition that the functional layer is evaporated in the preset area.