Display device and method of manufacturing the same

1. A method of manufacturing a display device comprising a display unit comprising a plurality of pixels respectively having thin film transistors, and a terminal unit comprising an array of a plurality of terminals, signals to control an operation of the thin film transistors respectively being input into the plurality of terminals; the method comprising:

forming a first insulating film on a substrate;

forming the thin film transistors on the first insulating film;

forming a second insulating film in the display unit and in the terminal unit after the formation of the thin film transistors;

forming, in the second insulating film, contact holes each exposing at least a part of a corresponding thin film transistor among the plurality of thin film transistors, while forming a plurality of openings in the second insulating film in the terminal unit;

forming, on the second insulating film, a plurality of signal lines respectively connected to the thin film transistors via the contact holes, while forming, on the second insulating film, a plurality of terminal lines with the openings being located therebetween at the same time as the formation of the signal lines; and

forming a third insulating film of an organic insulating film on the plurality of signal lines and the plurality of terminal lines.

2. The method of manufacturing the display device according to claim 1 , further comprising:

partially removing the third insulating film in the terminal unit to expose a part of each of the plurality of terminal lines; and

forming a conductive film covering the exposed parts of the plurality of terminal lines.

3. The method of manufacturing the display device according to claim 2 , wherein a light-transmissive conductive film is formed as the conductive film.

4. The method of manufacturing the display device according to claim 1 , wherein the third insulating film is formed of an acrylic resin or polyimide.