The present application discloses an array substrate, a method of manufacturing the same, and a display panel. The method of manufacturing the array substrate includes: providing a substrate; sequentially stacking an active layer, a gate insulating layer, and a gate on the substrate and patterning the active layer, the gate insulating layer, and the gate with a photomask to form an active portion, a gate insulating portion, and a gate portion stacked in sequence; and providing an interlayer dielectric layer on the substrate, the active portion, the gate insulating portion, and the gate portion.