Array substrate, display panel and method for manufacturing array substrate

A method for manufacturing an array substrate, comprising:

• forming a first active layer on a substrate;
• forming an intermediate layer on a side of the first active layer away from the substrate, wherein the intermediate layer has a first via arriving at the first active layer;
• and
• forming a second active layer on the intermediate layer, wherein the second active layer comprises a first sub-active layer, a second sub-active layer and a third sub-active layer, the first sub-active layer extending around a perimeter of the first via and in a direction away from the first via, the second sub-active layer covering a side wall of the first via, the third sub-active layer being at a bottom of the first via and covering a portion of a surface of the first active layer exposed by the first via, wherein the second active layer is continuous, wherein the second active layer covers the side wall of the first via and the bottom of the first via, but does not fill the first via, and
• wherein the first active layer comprises polysilicon, and wherein the second active layer comprises polysilicon.