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

Abstract

An array substrate and a manufacturing method thereof are provided. The array substrate includes a display area () and a fan-out area () disposed at the periphery of the display area (), the manufacturing method comprising forming a line pattern () disposed in at least one of the display area () and the fan-out area (), wherein forming a line pattern disposed in at least one of the display area and the fan-out area includes the following steps: forming a metal layer (); forming an intermediate pattern () by performing a first patterning process on the metal layer; and forming the line pattern disposed in at least one of the display area () and the fan-out area () by performing a second patterning process on the intermediate pattern. The manufacturing methods provided by the respective embodiment of the present disclosure are capable of narrowing of the lines in the fan-out area, and compared with the existing one exposure method, can effectively reduce the risk of open-circuit and short-circuit.