Organic light emitting diode display device with cathode layer

An organic light emitting diode display device, comprising:

• a substrate;
• a first defined area disposed on the substrate, wherein the first defined area comprises an anode layer, a hole injection layer, a hole transport layer, and an organic light emitting layer are sequentially disposed on the substrate;
• a second defined area disposed on the substrate, wherein the second defined area comprises a metal layer;
• a bank layer disposed on the substrate, wherein the bank layer is disposed at an edge of the first defined area and in the second defined area, the bank layer electrically isolates the first defined area and the second defined area, and the metal layer is disposed on the bank layer;
• an electron transport layer, wherein the electron transport layer is disposed above the first defined area and the second defined area, and the electron transport layer comprises a cathode contact hole;
• and
• a cathode layer disposed on the electron transport layer,
• wherein the cathode layer is electrically connected to the metal layer through the electron transport layer.