Patent ID: 11927860
Assignee: SHARP DISPLAY TECHNOLOGY CORPORATION
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. A manufacturing method of an active matrix substrate including a display region including a plurality of pixel areas and a non-display region located around the display region, and including a plurality of thin film transistors and a plurality of pixel electrodes arranged in association with the plurality of pixel areas, respectively, and a plurality of touch wiring lines for a plurality of touch sensors, the manufacturing method comprising:
(A) forming a first metal layer from a first conductive film on a substrate, the first metal layer including a plurality of gate bus lines and a plurality of gate electrodes of the plurality of thin film transistors in the plurality of pixel areas, respectively;
(B) forming a gate insulating layer that covers the first metal layer;
(C) in each of the plurality of pixel areas, forming an oxide semiconductor layer located on the gate insulating layer from the oxide semiconductor film;
(D) after the forming of the oxide semiconductor layer (C), forming a second metal layer from a second conductive film, the second metal layer including a plurality of source bus lines, and a plurality of source electrodes and a plurality of drain electrodes of the plurality of thin film transistors in the plurality of pixel electrodes, respectively;
(E) forming an interlayer insulating layer that covers the second metal layer, the interlayer insulating layer having a layered structure including an inorganic insulating layer and an organic insulating layer arranged on the inorganic insulating layer, and in each of the plurality of pixel areas, the interlayer insulating layer including a lower opening that exposes part of each of the plurality of drain electrodes of each of the plurality of thin film transistors;
(F) forming a third metal layer from a third conductive film on the interlayer insulating layer, the third metal layer including the plurality of touch wiring lines and a plurality of connection electrodes, each of the plurality of connection electrodes being in contact with the part of each of the plurality of drain electrodes in the lower opening in each of the plurality of pixel areas;
(G) forming a first dielectric layer that covers the third metal layer from a first dielectric film, the first dielectric layer including an opening for touch contact that exposes part of each of the plurality of touch wiring lines;
(H) forming a common electrode from a first transparent conductive film on the first dielectric layer, the common electrode including a plurality of common electrode portions, each of the plurality of common electrode portions functioning as a first electrode for a touch sensor, and each of the plurality of common electrode portions being connected to one of the plurality of touch wiring lines in the opening for touch contact;
(I) forming a second dielectric layer that covers the common electrode and the plurality of connection electrodes;
(J) in each of the plurality of pixel areas, forming an upper opening in the first and second dielectric layers that exposes part of each of the plurality of connection electrodes; and
(K) in each of the plurality of pixel areas, forming a pixel electrode on the second dielectric layer and in the upper opening, the pixel electrode being in contact with each of the plurality of connection electrodes in the upper opening.