Array substrate, manufacturing method thereof, and display device

A method for manufacturing an array substrate, the array substrate comprising a base substrate, a first conductive pattern, an insulation layer covering the first conductive pattern, and a second conductive pattern arranged on the insulation layer, the insulation layer comprising a via-hole through which the first conductive pattern is connected to the second conductive pattern, wherein the method comprises:

• forming a conductive post connected to the first conductive pattern in the via-hole before forming the second conductive pattern, and;
• forming the second conductive pattern connected to the conductive post,
• wherein the conductive post fills in the via-hole, the first conductive pattern is not in direct contact with the second conductive pattern, and the first conductive pattern is connected to the second conductive pattern through the conductive post, and
• the conductive post comprises a resin column object and a conductive material enclosing the resin column object,
• the insulation layer comprises a passivation layer, an upper surface of the conductive post is coplanar with an upper surface of the passivation layer, and
• the conductive post is in direct contact with the base substrate,
• wherein the first conductive pattern is a drain electrode of a thin film transistor (TFT), and the second conductive pattern is a pixel electrode.