Patent ID: 9570528
Date: 2017-02-14
CPC Classifications: H01L

Claim:
1. An organic light-emitting display apparatus comprising: a thin film transistor comprising an active layer, a gate electrode, a source electrode, a drain electrode, a first insulating layer between the active layer and the gate electrode, and a second insulating layer between the gate electrode and the source and drain electrodes; a pad electrode comprising a first pad layer at a same layer as the source electrode and the drain electrode, the first pad layer being at a surface of the second insulating layer facing away from the first insulating layer, and a second pad layer on the first pad layer; a third insulating layer covering the source electrode and the drain electrode and an end portion of the pad electrode; a pixel electrode comprising a semi-transmissive electrically conductive layer at an opening in the third insulating layer; a protection layer between the pixel electrode and the first insulating layer; a fourth insulating layer having an opening at a location corresponding to the opening formed in the third insulating layer, the fourth insulating layer covering an end portion of the pixel electrode; an emission layer on the pixel electrode; and an opposing electrode on the emission layer, wherein a portion of the third insulating layer is located between the pixel electrode and the protection layer and covering a portion of a top surface of the protection layer in direct contact.