Display device and manufacturing method thereof

A display device comprising:

• a display area for displaying an image;
• a peripheral area that surrounds the display area;
• a pixel disposed in the display area;
• a bus line disposed in the peripheral area and configured to transmit a signal;
• a connection conductor set electrically connected to the bus line;
• and
• a branch line electrically connected to the connection conductor set, configured to receive the signal from the bus line, and configured to transmit the signal to the pixel,
• wherein the connection conductor set includes the following separate elements:
• an interconnection conductor;
• a bus line connection conductor set, which directly contacts each of the interconnection conductor and the bus line;
• a branch line connection conductor set, which is separated from the bus line connection conductor and directly contacts each of the interconnection conductor and the branch line, and
• wherein a material of the interconnection conductor is different from a material of at least one of the bus line connection conductor set and the branch line connection conductor set,
• wherein the interconnection conductor overlaps and directly contacts each of the bus line and the branch line,
• wherein the display device further comprises:
• a substrate;
• a gate insulating layer disposed between the substrate and the branch line connection conductor set;
• and
• an interlayer insulating layer disposed between the branch line connection conductor set and the branch line, and having an opening, and
• wherein a portion of the interconnection conductor is disposed inside the opening and directly contacts the gate insulating layer, the bus line connection conductor set, and the branch line connection conductor set in the opening.