Array substrate, manufacturing method thereof, and display device

A method for manufacturing an array substrate, comprising:

• forming a substrate;
• forming a first gate on the substrate;
• forming a first gate insulating layer on the first gate and the substrate;
• forming a first active layer on the first gate insulating layer;
• forming a first interlayer dielectric layer on the first active layer and the first gate insulating layer;
• forming a second active layer on the first interlayer dielectric layer;
• forming a second gate insulating layer on the second active layer and the first interlayer dielectric layer;
• forming a second gate on the second gate insulating layer;
• forming a second interlayer dielectric layer on the second gate and the second gate insulating layer;
• a source-drain layer is formed on the second interlayer dielectric layer, and the source-drain layer includes a first source, a second source, a first drain, and a second drain, wherein the first source is electrically connected to the second source, the first source is electrically connected to one end of the first active layer, and the second source is electrically connected to one end of the second active layer, the first drain is electrically connected to the other end of the first active layer, and the second drain is electrically connected to the other end of the second active layer.