Polyimide, preparation method of polyimide film and flexible display panel

A technology of polyimide film and polyimide, which is applied in semiconductor/solid-state device manufacturing, photovoltaic power generation, electrical components, etc., can solve the problems of increased material brittleness, risk of fragmentation, loose accumulation of molecular chains, etc., to achieve Effects of improving mechanical properties and reducing the risk of fragmentation

Pending Publication Date: 2020-07-10
SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reduced rigid chain segments and loose molecular chain accumulation of the improved polyimide lead to a decrease in the mechanical properties of the material, especially after the array layer is prepared, the brittleness of the material increases and the risk of fragmentation is more likely to occur

Method used

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  • Polyimide, preparation method of polyimide film and flexible display panel
  • Polyimide, preparation method of polyimide film and flexible display panel
  • Polyimide, preparation method of polyimide film and flexible display panel

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Embodiment Construction

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying 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.

[0047] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " The orientation or positional relationship indicated by “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner” and “outer” are based on the orientation shown in the drawings Or the positional relationship is only for the convenience of de...

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Abstract

The invention discloses polyimide, a preparation method of a polyimide film and a flexible display panel, the polyimide is formed by copolymerization of an aromatic diamine monomer, a polyamino aromatic monomer and an aromatic dicarboxylic anhydride monomer, and the polyamino aromatic monomer comprises at least three amino groups. A small amount of polyamino aromatic monomer is added; in the polyimide forming process, two amino groups in the polyamino aromatic monomer are formed in a main chain of polyimide, and the remaining amino groups are used as side chain groups and can be in dehydrationcondensation bond connection with unreacted carboxyl groups, so that polyimide forms a cross-linked structure, and the mechanical property of polyimide is improved.

Description

Technical field [0001] This application relates to the field of display technology, and in particular to a method for preparing polyimide and polyimide film, and a flexible display panel. Background technique [0002] In recent years, as various folding screen products are put on the market, flexible display has gradually become a research hotspot. For flexible displays, one of the most important key points is the polymer substrate material that can replace the traditional glass substrate. Compared with traditional glass substrates, polymer substrates have the advantages of being lighter, thinner, and having a smaller curvature. Among many polymer materials, yellow polyimide has a glass transition temperature of more than 400° C., and has excellent mechanical properties and dimensional stability. Therefore, it is a favorable candidate for flexible displays, especially top-emitting OLED panels. [0003] For OLED top-emission or partial flexible liquid crystal display technology, i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G73/10C08J5/18H01L51/00C08L79/08
CPCC08G73/1067C08G73/1071C08G73/1064C08G73/1039C08G73/1085C08J5/18C08J2379/08H10K77/111Y02E10/549
Inventor 张莉
Owner SHENZHEN CHINA STAR OPTOELECTRONICS SEMICON DISPLAY TECH CO LTD
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