Display substrate and preparation method

A technology for display substrates and substrate substrates, which is used in the manufacture of semiconductor/solid-state devices, semiconductor devices, electrical components, etc., can solve the problems of complex process and high development cost, and achieve the effect of simple process, low cost and stable output characteristics.

Pending Publication Date: 2021-02-26
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005] The present invention provides a display substrate and a preparation method to solve the problem of the existing display substrate and preparation method. Since the top-gate self-aligned

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  • Display substrate and preparation method

Examples

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[0032]The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work shall fall within the protection scope of the present invention.

[0033]In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " "Back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise" and other directions or The positional relationship is based on the position or positional relationship shown in the drawings, and is only for the convenience of ...

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Abstract

A display substrate at least comprises a substrate body, a first thin film transistor, a storage capacitor, a second thin film transistor and a light-emitting unit; the first thin film transistor is athin film transistor without a shading layer; the second thin film transistor is a thin film transistor with a top shading layer; the second thin film transistor further comprises a buffer layer, a second active layer, a second gate insulating layer, a second gate electrode, a second interlayer insulating layer, a second drain electrode, a second source electrode, a shading layer and a passivation layer; the second drain electrode, the second source electrode and the shading layer are all formed by patterning a first metal thin film; the shading layer completely covers the area where the second grid electrode is located; and the first end of the shading layer extends to the area where the second drain electrode is located.

Description

technical field [0001] The invention relates to the field of display technology, in particular to a display substrate and a preparation method. Background technique [0002] Currently, organic light-emitting diodes (Organic Light-Emitting Diode, OLED) or micro light-emitting diodes (Micro Light-Emitting Diode, Micro-LED) are used as current-driven devices, which require a large current passing capability and good device stability. , In-plane threshold voltage (Threshold Voltage, V th ) Uniformity and low leakage current characteristics. The study found that the Top Gate IGZO Thin Film Transistor has high mobility, small parasitic capacitance and low leakage current, and is more suitable as a current-driven display circuit. For bottom-emitting display substrates, it is best to have a light blocking layer at the bottom of the driving thin film transistor (TFT), which can block the influence of ambient light on the characteristics of the TFT, and the output characteristics of...

Claims

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Application Information

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IPC IPC(8): H01L27/12H01L27/15H01L27/32H01L29/786H01L21/77
CPCH01L29/78633H01L27/1225H01L27/1255H01L27/1288H01L27/127H01L27/156H10K59/1213
Inventor 卢马才
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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