Display device

A display device, comprising:

• a substrate comprising a pixel region and a driving circuit, wherein the pixel region is disposed adjacent to the driving circuit;
• a metal oxide semiconductor transistor disposed over the substrate and comprising:
• a metal oxide semiconductor layer,
• a first gate electrode overlapping with the metal oxide semiconductor layer;
• and
• a gate insulating layer disposed between the metal oxide semiconductor layer and the first gate electrode, and the gate insulating layer having a first opening, wherein the first opening and the pixel region overlap;
• a second insulating layer disposed over the metal oxide semiconductor layer and having a via and a second opening, wherein the second opening and the first opening overlap;
• and
• a pixel electrode electrically connected to the metal oxide semiconductor layer through the via.