Patent ID: 9705104
Date: 2017-07-11
CPC Classifications: H01L

Claim:
1. An OLED display substrate, comprising a substrate, a TFT located on the substrate, a passivation layer located on the TFT, a flat layer located on the passivation layer, a connecting electrode being located on the flat layer and contacting the TFT, an anode being located on the flat layer and covering the connecting electrode, an organic emitting layer located on the anode and a cathode located on the organic emitting layer; wherein the connecting electrode contacts the TFT with a contact hole penetrating the flat layer and the passivation layer; wherein the anode is electrically connected to the TFT via the connecting electrode; and wherein the connecting electrode comprises a filling part that is received in and completely fills up the contact hole to be electrically connected with the TFT and a projecting part that is formed on a top surface of the flat layer such that a bottom surface of the projecting part is in contact with and supported on the top surface of the flat layer, the projecting part having a top surface spaced from the bottom surface thereof and a circumferential surface connected between the top and bottom surfaces thereof; the projecting part is located exactly under the anode that is laid directly on the top surface of the flat layer, the anode having a portion extending along and in direct contact with and covering the top surface and the circumferential surface of the projecting part of the connecting electrode so as to have the top surface and the circumferential surface of the projecting part of the connecting electrode completely covered and enclosed by the portion of the anode, while a remaining portion of the anode is located directly on the top surface of the flat layer.