Patent ID: 7897972

Claim:
A display device comprising: a thin film transistor over a substrate, the thin film transistor comprising a source region and a drain region; a pixel electrode comprising a conductive oxide film electrically connected to one of the source region and the drain region through a first electrode, the first electrode comprising a first layer in contact with the one of the source region and the drain region, a second layer formed on the first layer, and a third layer formed on the second layer and in contact with the pixel electrode, wherein the first layer has a barrier characteristics, the second layer comprises aluminum, and the third layer has a barrier characteristics; a contact portion configured to be connected to an outside of the display device, wherein the contact portion comprises a second electrode, the second electrode comprising a fourth layer, a fifth layer formed on the fourth layer, and a sixth layer formed on the fifth layer, wherein the fourth layer has a barrier characteristics, the fifth layer comprises aluminum, and the sixth layer has a barrier characteristics.