Method for fabricating organic light emitting diode display device with improved effective emitting pixels area

A method of fabricating an organic light emitting diode display device, comprising:

• forming a single layer first electrode directly contacting over a substrate including a display region, which includes a plurality of pixel regions, the single layer first electrode formed in each of the plurality of pixel regions;
• forming a bank including a lower layer and an upper layer, the lower layer formed on edges of the single layer first electrode and having a first width and a first thickness, and the upper layer formed on the lower layer and having a second width smaller than the first width, wherein the forming of the bank includes:
• applying directly a polymer material having a hydrophobic property by itself on the single layer first electrode to form a hydrophobic property bank material layer;
• and
• patterning the hydrophobic property bank material layer to form the lower layer and the upper layer each having the hydrophobic property by itself;
• forming an organic emitting layer directly contacting the single layer first electrode and directly contacting a portion of the lower layer;
• and
• directly forming a single second electrode layer directly in contact with the entire organic emitting layer, the single second electrode layer covering an entire surface of the display region.