Active matrix substrate, liquid crystal display device and method for manufacturing active matrix substrate

An active matrix substrate including a display region including a plurality of pixel areas arrayed in a matrix shape in a row direction and a column direction, and a non-display region positioned in a periphery of the display region, in which a peripheral circuit is disposed in the non-display region;

• the active matrix substrate comprising:
• a substrate;
• a pixel TFT supported by the substrate and provided corresponding to each of the plurality of pixel areas, the pixel TFT including an oxide semiconductor layer;
• an organic insulating layer disposed above at least the oxide semiconductor layer of the pixel TFT and positioned in the display region and at least a portion of the non-display region when viewed from a normal direction of the substrate;
• and
• an inorganic insulating layer disposed in contact with an upper surface of the organic insulating layer on the organic insulating layer,
• wherein the organic insulating layer and the inorganic insulating layer are provided with a dual-layer hole structure portion,
• the dual-layer hole structure portion includes
• a through-hole provided in the inorganic insulating layer,
• a bottomed hole provided in the organic insulating layer and positioned below the through-hole, and
• an entirety of the through-hole is positioned on an inner side of an outer edge of the bottomed hole when viewed from the normal direction of the substrate, and
• the dual-layer hole structure portion is disposed between the display region and the peripheral circuit.