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Method for preparing transparent conductive film of flexible display

A transparent conductive film, flexible display technology, applied in semiconductor/solid-state device manufacturing, circuits, electrical components, etc., can solve the problems of poor adhesion between graphene and flexible substrates, increased device defect rate, peeling, etc., to achieve excellent Peel strength, excellent flexibility, performance-enhancing effects

Active Publication Date: 2018-10-19
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to poor adhesion between graphene and flexible substrates, it may peel off or even fall off after long-term use, affecting its service life
[0006] In addition, the current preparation of conductive thin films for displays is mainly through magnetron sputtering and other methods. The process is relatively cumbersome, and it will cause deformation of the display to a certain extent and increase the defective rate of devices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Under the protection of nitrogen, 0.10 mol of 2,2-bis[4-(4-aminophenoxyphenyl)]hexafluoropropane was added into the three-necked flask, and then N,N-dimethylacetamide was added to dissolve it. Stir at constant temperature at 30°C. After the dissolution is complete, add 0.080mol of 4,4'-terephthalic dioxydiphthalic anhydride and 0.022mol of 3,3',4,4'-biphenyltetracarboxylic acid di anhydride, lower the reaction temperature to 0°C, and react for 20 hours to obtain a polyamic acid solution. BaRuO with an average particle size of 20 nm 3 The powder was sintered at 1700°C for 5 hours, and after cooling to room temperature, an appropriate amount was added to the polyamic acid solution and stirred evenly to form a mixed solution, during which N,N-dimethylacetamide was added to keep the solid content of the mixed solution at 15%. CaO 3 The amount of powder used is 6% of the total mass of dianhydride and diamine monomers in the polyamic acid solution used. The mixed solution i...

Embodiment 2

[0025] Under nitrogen protection, 0.08 mol of 2,2-bis[4-(4-aminophenoxyphenyl)]hexafluoropropane and 0.02 mol of 4,4'-diaminodiphenyl ether were added to a three-necked flask, Then add N,N-dimethylacetamide to dissolve, and stir at 30°C at a constant temperature. After the dissolution is complete, add 0.102mol of 4,4'-terephthalic dioxydiphthalic anhydride, and lower the reaction temperature to 0°C, reacted for 15 hours to obtain a polyamic acid solution. BaRuO with an average particle size of 25 nm 3 The powder was sintered at 1700°C for 5 hours, and after cooling to room temperature, an appropriate amount was added to the polyamic acid solution and stirred evenly to form a mixed solution, during which N,N-dimethylacetamide was added to keep the solid content of the mixed solution at 15%. CaO 3 The amount of powder used is 10% of the total mass of dianhydride and diamine monomers in the polyamic acid solution used. The mixed solution is coated on the substrate to control th...

Embodiment 3

[0027] Under the protection of nitrogen, 0.10 mol of 2,2-bis[4-(4-aminophenoxyphenyl)]hexafluoropropane was added into the three-necked flask, and then N,N-dimethylacetamide was added to dissolve it. Stir at constant temperature at 30°C. After the dissolution is complete, add 0.070mol of 4,4'-terephthalic dioxydiphthalic anhydride and 0.032mol of 4,4'-biphenyl ether dianhydride, and lower the reaction temperature to 0°C, reacted for 18 hours to obtain a polyamic acid solution. BaRuO with an average particle size of 20 nm 3 The powder was sintered at 1700°C for 5 hours, and after cooling to room temperature, an appropriate amount was added to the polyamic acid solution and stirred evenly to form a mixed solution, during which N,N-dimethylacetamide was added to keep the solid content of the mixed solution at 15%. CaO 3 The amount of powder used is 8% of the total mass of dianhydride and diamine monomers in the polyamic acid solution used. The mixed solution is coated on the su...

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Abstract

The invention discloses a transparent and colorless conductive film for a flexible display. The preparation method comprises the following steps: first, using a diamine monomer comprising 2,2-bis[4-(4-aminophenoxy phenyl)]hexafluoropropane as a main component and a dianhydride monomer comprising 4, 4'-(p-phenylenedioxy)bis(phthalic anhydride) as a main component to react to obtain a polyamide acidsolution, then adding nanoscale barium ruthenate powder subjected to sintering at a high temperature of over 1700 DEG C, thereby obtaining a mixed solution, and performing imidization on a film obtained after removing solvents from the mixed solution, thereby obtaining the colorless transparent conductive film for a flexible display. The conductive film obtained by the invention is obtained by using a transparent and colorless flexible polyimide material as a matrix and adding high-conductivity BaRuO3 powder, and overcomes the defects of relatively poor flexibility of a traditional transparent conductive layer of ITO, nano silver wire, graphene and the like used in a flexible display, poor adhesion to the flexible substrate, and the like. At that same time, the problem that the transparency of the composite film obtained by adding conductive filler to a common polyimide matrix is poor and a conductive effect is not ideal is solved.

Description

technical field [0001] The invention relates to the field of substrates for flexible displays, in particular to a method for preparing a transparent conductive layer for flexible displays. technical background [0002] Compared with traditional rigid displays, flexible displays have many advantages, such as light weight, strong flexibility, impact resistance, high brightness, and low cost. Therefore, it has a broader application prospect in the display field and has become an important component of new and intelligent electronic products. [0003] As one of the important devices in flexible displays, the flexible conductive layer is currently mainly improved by adding materials such as ITO, nano-silver, metal grids, and graphene. Patent [CN 201010162968.6] and patent [CN201310306194.3] disclose ITO-based flexible transparent conductive film with high transmittance and its preparation method. The obtained transparent conductive film has good visible light transparency and e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L21/02H01L29/43
CPCH01L21/02697H01L29/43
Inventor 冯琦徐勇李林霜
Owner NANJING UNIV OF SCI & TECH
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