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Thin film transistor and manufacturing method thereof, display panel and display device

A technology for thin film transistors and gates, applied in the fields of display panels and display devices, thin film transistors and their manufacturing methods, can solve the problems such as the ineffectiveness of products and the influence of the performance of thin film transistors, so as to reduce stress, improve quality, and avoid damage Effect

Active Publication Date: 2017-09-05
KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the change of the thickness of each layer material in the thin film transistor may have an impact on the performance of the thin film transistor, resulting in the final product not reaching the expected effect

Method used

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  • Thin film transistor and manufacturing method thereof, display panel and display device
  • Thin film transistor and manufacturing method thereof, display panel and display device

Examples

Experimental program
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Effect test

Embodiment 1

[0027] figure 1 A schematic structural diagram of a thin film transistor provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the thin film transistor proposed in this embodiment includes an active region 11, a gate insulating layer 12, a gate 13, a source 14, a drain 15, a passivation layer 16 and a flat surface formed sequentially on a flexible substrate 10. A protection layer 17 is formed between the passivation layer 16 and the planarization layer 17 , and the protection layer 18 is located directly above the active region 11 and the gate 13 .

[0028] from figure 1 It can be seen from the figure that the protection layer 18 is located directly above the active region 11 and the gate 13, and the protection layer 18 completely covers the gate 13 in a direction perpendicular to the gate 13. The material of the protective layer 18 is organic or metal, and can also be other materials known to those skilled in the art. The protective layer 18 has...

Embodiment 2

[0034] The present invention provides a method for preparing the thin film transistor described in Embodiment 1, comprising: sequentially forming an active region 11, a gate insulating layer 12, a gate 13, a source 14 and a drain 15 on a flexible substrate 10, and A passivation layer 17, a protective layer 18 is formed on the passivation layer 16, a planarization layer 17 is formed on the protective layer 18; the protective layer 18 is located between the active region 11 and the gate 13 Directly above. finally formed figure 1 or figure 2 structure shown.

[0035] The protective layer 18 has a protective effect on the semiconductor material in its vertical region, thereby reducing the stress on some materials of the thin film transistor during the bending process, avoiding possible damage to the semiconductor material during the bending process of the thin film transistor device, and thereby improving the reliability of the device. quality.

[0036] The protective layer 1...

Embodiment 3

[0038] This embodiment provides a display panel, which includes the thin film transistor described in the first embodiment.

[0039]The display panel of this embodiment has the thin film transistor in the first embodiment, so a protection layer is formed between the passivation layer and the planarization layer of the thin film transistor, and the protection layer is located between the active region and the gate. Directly above, it has a protective effect on the semiconductor material in its vertical region, thereby reducing the stress on some materials of the thin film transistor during the bending process, avoiding possible damage to the semiconductor material during the bending process of the thin film transistor device, and thus improving the quality of the device When the protective layer is made of a metal material, the protective layer covers the gap between the active region, the grid, the source and the drain in a direction perpendicular to the grid, because the mater...

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Abstract

The invention provides a thin film transistor and a manufacturing method thereof, a display panel and a display device. The thin film transistor comprises an active region, a gate insulating layer, a gate, a source, a drain, a passivation layer and a planarization layer formed on a flexible substrate in turn. A protective layer is formed between the passivation layer and the planarization layer, and the protective layer is disposed right above the active region and the gate. As the protective layer protects the semiconductor material in the vertical region of the thin film transistor, the stress borne by part of the material of the thin film transistor in the bending process is reduced, possible damage to the semiconductor material in the bending process of the thin film transistor is avoided, and the quality of devices is improved.

Description

technical field [0001] The invention relates to the technical field of flexible display, in particular to a thin film transistor and a manufacturing method thereof, a display panel and a display device. Background technique [0002] Organic light-emitting devices, that is, organic light-emitting diodes (Organic Light-Emitting Diode, referred to as OLED), also known as organic electroluminescence display (Organic Electroluminescence Display, referred to as OLED), have all solid-state characteristics, good mechanical properties, and strong shock resistance. Plastic, polyester film or film is used as the substrate, and the OLED screen can be made thinner, and can even be folded or rolled up to achieve flexible soft screen display. [0003] With the development of display technology, researchers continue to make improvements to foldable or roll-up flexible display devices. Compared with traditional rigid display devices (that is, display devices made on inflexible substrates suc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L29/786H01L27/12H01L29/06
CPCH01L27/1214H01L27/1259H01L29/0603H01L29/786H01L27/1248H01L29/66742H01L29/78603H01L29/78606Y02E10/549Y02P70/50H10K59/124H01L29/06H10K59/1213H10K77/111H10K2102/311
Inventor 单奇胡坤林立刘嵩
Owner KUNSHAN NEW FLAT PANEL DISPLAY TECH CENT
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