OLED display substrate and manufacturing method of OLED display substrate

Abstract

The invention provides an OLED display substrate and a manufacturing method of the OLED display substrate. The OLED display substrate comprises a substrate body (10), a TFT (90) arranged on the substrate body (10), a passivation layer (50) arranged on the TFT (90), a flat layer (60) arranged on the passivation layer (50), a connecting electrode (80) which is arranged on the flat layer (60) and is in contact with the TFT (90), an anode (70) which is arranged on the flat layer (60) and covers the connecting electrode (80), an organic light emitting layer (71) arranged on the anode (70) and a cathode (72) arranged on the organic light emitting layer (71). The connecting electrode (80) penetrates through contact holes (81) of the flat layer (60) and the passivation layer (50) to be in contact with the TFT (90); the anode (70) is electrically connected with the TFT (90) through the connecting electrode (80); short circuits between the cathode (72) and the anode (70) on the OLED display substrate can be prevented, current concentration caused by the short circuits is avoided, and normal light emitting of an OLED is guaranteed.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an OLED display substrate and a manufacturing method thereof. Background technique [0002] So far, the practical display devices mainly include cathode ray tube (CRT), liquid crystal display (LCD), vacuum fluorescent device (VFD), plasma display (PDP), organic electroluminescent device (OLED), field emission display ( FED) and electroluminescent display (ELD), etc. LCD, OLED, etc. have gradually replaced CRT displays. [0003] OLED is a display technology with great development prospects. It not only has excellent display performance, but also has the characteristics of self-illumination, simple structure, ultra-thin, fast response, wide viewing angle, low power consumption and flexible display. Known as the "dream display", it has been favored by major display manufacturers and has become the main force of the third-generation display devices in the field of display technolo...

AI Technical Summary

Problems solved by technology

However, when preparing the organic light-emitting layer 600 on the anode 500, the organic light-emitting layer 600 on the concave portion of the anode 500 may be extremely thin or even impossible to form. If the cathode is prepared, it is very easy to cause a short circuit between the cathode and the anode, and the current flows concentratedly through the short circuit, preventing the current from flowing through the organic light-emitting layer 600, resulting in the problem that the OLED cannot emit light.

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