Thin-film semiconductor device for display apparatus, method for manufacturing thin-film semiconductor device for display apparatus, EL display panel, and EL display apparatus

A thin-film semiconductor device for a display apparatus, the thin-film semiconductor device comprising:

• a substrate;
• a gate electrode above the substrate;
• a gate insulating film above the substrate to cover the gate electrode;
• a semiconductor layer on the gate insulating film;
• a first electrode above the semiconductor layer;
• a second electrode in a same layer as the first electrode;
• an interlayer insulating film above the gate insulating film to cover the first electrode and the second electrode;
• a gate line above the interlayer insulating film in a layer different from a layer including the gate electrode;
• and
• a power supply line in a same layer as the gate line and adjacent to the gate line,
• wherein the gate electrode and the gate line are electrically connected via a first conductive portion passing through the gate insulating film and the interlayer insulating film, a longest side of the power supply line extends in parallel with a longest side of the gate line,
• the power supply line and one of the first electrode and the second electrode are electrically connected via a second conductive portion passing through the interlayer insulating film,
• the power supply line supplies power to the first electrode or the second electrode,
• a width of the power supply line corresponds to a width of a gap between two adjacent gate lines, and
• the power supply line is arranged near the two adjacent gate lines to fill the gap between the two adjacent gate lines.