El display panel, el display apparatus, and method of manufacturing el display panel

A method of manufacturing an EL display panel, comprising:

• a first process of preparing a substrate;
• a second process of forming a gate electrode above the substrate;
• a third process of forming a gate insulating film above said substrate to cover the gate electrode;
• a fourth process of forming a semiconductor layer on the gate insulating film and above the gate electrode;
• a fifth process of forming a first electrode above the semiconductor layer and forming, in a same layer as the first electrode, a second electrode and a first power supply line electrically connected to the second electrode;
• a sixth process of forming a first interlayer insulating film above the gate insulating film to cover the first electrode and the second electrode;
• a seventh process of forming a first contact hole through the gate insulating film and the first interlayer insulating film, and forming a second contact hole through the first interlayer insulating film;
• an eighth process of forming, by forming a metal film above the first interlayer insulating film and patterning the metal film, (i) a gate line electrically connected to the gate electrode through the first contact hole and crossing the first power supply line, (ii) a second power supply line electrically connected to the first power supply line through the second contact hole and side-by-side with the gate line, and (iii) an auxiliary line side-by-side with the second power supply line;
• a ninth process of forming a second interlayer insulating film to cover upper surfaces of the first interlayer insulating film, the second power supply line, and the auxiliary line;
• a tenth process of forming a third contact hole through the second interlayer insulating film above the auxiliary electrode;
• and
• an eleventh process of forming, above the second interlayer insulating film, an EL unit including an anode electrode, a cathode electrode, and a light-emitting layer interposed between the anode electrode and the cathode electrode,
• wherein, in said eleventh process, the cathode electrode and the auxiliary line are electrically connected through the third contact hole.