Patent ID: 9035311
Filing Date: 2015-05-19
Classification: H01L

Abstract:
1. An organic light emitting diode (OLED) display device, comprising: a substrate having a thin film transistor region and a capacitor region; a buffer layer disposed on the substrate; a patterned semiconductor layer disposed on the buffer layer in the thin film transistor region of the substrate; a gate insulating layer disposed on the substrate to cover the patterned semiconductor layer; a gate electrode disposed on the gate insulating layer and facing a predetermined region of the patterned semiconductor layer; a lower capacitor electrode disposed on the gate insulating layer in the capacitor region; an interlayer insulating layer disposed on the substrate to cover the gate electrode and the lower capacitor electrode; source and drain electrodes disposed on the interlayer insulating layer and electrically connected to the patterned semiconductor layer; an upper capacitor electrode disposed on the interlayer insulating layer and facing the lower capacitor electrode; a first electrode disposed on the interlayer insulating layer and electrically connected to one of the source and drain electrodes; an organic layer disposed on the first electrode, the organic layer including a light emitting layer; and a second electrode disposed on the organic layer, wherein a region of the buffer layer corresponding to the capacitor region of the substrate, a region of the gate insulating layer corresponding to the capacitor region of the substrate, a region of the interlayer insulating layer corresponding to the capacitor region of the substrate, a region of the lower capacitor electrode corresponding to the capacitor region of the substrate, and a region of the upper capacitor electrode corresponding to the capacitor region of the substrate each has a surface on which protrusions are formed, the protrusions following a shape of grain boundaries of the patterned semiconductor layer.