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

摘要

An organic light emitting diode display device includes a substrate including a display region, wherein a plurality of pixel regions are defined in the display region; a first electrode over the substrate and in each of the plurality of pixel regions; a bank including a lower layer and an upper layer on the first electrode, the lower layer disposed on edges of the first electrode and having a first width and a first thickness, the upper layer disposed on the lower layer and having a second width smaller than the first width; an organic emitting layer on the first electrode and a portion of the lower layer; and a second electrode on the organic emitting layer and covering an entire surface of the display region.

主权项

1. 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; andpatterning 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.