Organic light emitting diode back plate and method of manufacturing same

A method of manufacturing an OLED back plate, comprising steps of:

• providing a TFT substrate, and forming an electrode layer on the TFT substrate;
• forming a pixel defining layer on the electrode layer, and dividing the pixel defining layer to form a plurality of pixel units, wherein each of the pixel units comprises a portion of the pixel defining layer and a light emitting area, and an inter-pixel area is formed between adjacent two of the pixel units;
• etching the electrode layer corresponding to the inter-pixel area wherein the electrode layer is divided into a plurality of portions, and each portion corresponds to the portion of the pixel defining layer, each of the pixel units comprises a portion of the electrode layer, and the pixel defining layer of each pixel unit is correspondingly disposed on each portion of the electrode layer;
• removing the pixel defining layer of each of the pixel units corresponding to the light emitting area to form a pixel opening;
• and
• forming a barrier block between adjacent two of the pixel defining layers of adjacent two of the pixel units.