Array substrate, manufacturing method thereof, touch display panel and touch display device

A manufacturing method for an array substrate, comprising:

• providing a base substrate;
• forming a plurality of thin film transistors in an array on the base substrate;
• forming an insulating planarization layer on a side of the plurality of thin film transistors away from the base substrate and forming a plurality of vias exposing respective drains of respective ones of the plurality of thin film transistors in the insulating planarization layer;
• forming a plurality of pixel electrodes in an array on a side of the insulating planarization layer away from the plurality of thin film transistors, wherein ones of the plurality of pixel electrodes are connected to the respective drains of corresponding ones of the plurality of thin film transistors through respective ones of the plurality of vias in the insulating planarization layer;
• forming a first dielectric layer on a side of the plurality of pixel electrode away from the insulating planarization layer;
• forming a plurality of touch electrodes in an array on a side of the first dielectric layer away from the insulating planarization layer;
• forming a second dielectric layer on a side of the plurality of touch electrodes away from the plurality of pixel electrodes, wherein the orthographic projection of the entire width of the second dielectric layer on the base substrate does not overlap with the orthographic projections of the entire width of each of the plurality of pixel electrodes on the base substrate;
• and
• forming a plurality of common electrodes in an array on a side of the second dielectric layer away from the plurality of pixel electrodes, wherein ones of the plurality of common electrodes are connected to corresponding ones of the plurality of touch electrodes.