Display substrate and manufacturing method thereof, and display apparatus

A manufacturing method of a display substrate, wherein the display substrate comprises:

• a plurality of sub-pixels arranged in an array, wherein the display substrate further comprises a base substrate;
• and an interlayer insulating layer, at least one heightened part and a plurality of signal wires, sequentially disposed on the base substrate, wherein,
• an orthographic projection of the at least one heightened part on the base substrate is located between orthographic projections of two adjacent sub-pixels on the base substrate,
• two adjacent signal wires between the two adjacent sub-pixels are located on two sides of the at least one heightened part, and the two adjacent signal wires at least partially cover two lateral sides of the at least one heightened part respectively,
• the method, comprising:
• forming an interlayer insulating layer on a base substrate;
• applying a layer of heightening thin film, subjecting the heightening thin film to exposure and development processes, to form at least one heightened part between two adjacent sub pixels;
• forming a plurality of signal wires on the base substrate with the heightened part formed thereon;
• and
• forming a plurality of sub-pixels arranged in an array on the base substrate with the plurality of signal wires formed thereon,
• wherein an orthographic projection of the heightened part on the base substrate is located between orthographic projections of two adjacent sub-pixels on the base substrate, and two adjacent signal wires between the two adjacent sub-pixels are located on two sides of the heightened part, and the two adjacent signal wires at least partially cover two lateral sides of the heightened part respectively.