The disclosure relates to an array substrate, a display panel, a display device, and methods of manufacturing them. The array substrate includes: a base substrate, a first electrode, a first insulating layer, and a second electrode, the second electrode having a plurality of second electrode portions spaced apart from one another, the first electrode having overlapped portions that overlap the plurality of second electrode portions, the first electrode is one of a common electrode and a pixel electrode and the second electrode is the other; at least one of the second electrode and the overlapped portions has a recess recessing towards the base substrate and an area of an opening of the recess is larger than an area of a bottom of the recess.