Organic Light-Emitting Display Device and Method for Manufacturing the Same

A method for manufacturing an organic light-emitting display device, the method comprising:

• forming a driving thin-film transistor including a source electrode and a drain electrode on a substrate;
• forming an insulating film including first contact holes on the driving thin-film transistor such that the first contact holes are respectively filled with the source electrode and the drain electrode;
• forming a planarization layer on the insulating film such that a second contact hole exposing a portion of the drain electrode is defined in the planarization layer;
• forming a first electrode on the planarization layer such that the first electrode extends along the second contact hole and is connected to the drain electrode;
• forming a bank on the planarization layer so as to define a light-emitting area of each pixel;
• forming a protective layer over an entire surface of the substrate including the first electrode;
• forming a photoresist pattern on the protective layer so as to fill an entirety of the second contact hole and so as to be absent in an area in which a pixel pattern is to be formed;
• etching the protective layer using the photoresist pattern as an etch mask such that the first electrode is exposed in the area where the pixel pattern is to be formed;
• performing plasma treatment on an exposed surface of the first electrode;
• forming the pixel pattern on the exposed surface of the first electrode subjected to the plasma treatment;
• and
• performing a lift-off process of removing the protective layer and the photoresist pattern to form a sealing portion filling an inner space of the second contact hole at least partially.