Display device

A display device comprising:

• a first substrate including plural pixels in a display portion and a terminal portion outside of the display portion;
• and
• a flexible printed circuit substrate connected to the terminal portion,
• wherein the first substrate further includes:
• an insulating substrate;
• a first insulating film;
• a second insulating film on the first insulating film;
• a third insulating film on the second insulating film;
• a fourth insulating film on the third insulating film;
• a scanning line formed of a first metal layer between the insulating substrate and the first insulating film in the display portion;
• a video signal line formed of a second metal layer, which is a different metal layer from the first metal layer, between the first insulating film and the second insulating film in the display portion;
• a metal wiring formed of a third metal layer between the second insulating film and the third insulating film in the display portion;
• a first transparent electrode formed of a first transparent conductive film between the third insulating film and the fourth insulating film in the display portion;
• and
• a second transparent electrode formed of a second transparent conductive film on the fourth insulating film in the display portion,
• wherein the second metal layer is provided between the first metal layer and the third metal layer,
• wherein the terminal portion includes
• a metal portion formed of the third metal layer,
• a peripheral portion of the metal portion including a pair of long sides which is covered by a pair of third insulating films respectively, each of the pair of third insulating films being formed in an island shape along the corresponding one of the pair of long sides thereof, and
• the inside of the peripheral portion of the metal portion being exposed via a first through hole formed between the pair of third insulating films, and
• wherein the metal portion formed of the third metal layer is a different metal layer from the first metal layer and the second metal layer.