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Method for preparing graphene modified polyimide-based composite film and flexible printed circuit board

A polyimide film, graphene modification technology, applied in the direction of circuit substrate materials, printed circuits, printed circuits, etc., can solve the problems of inability to accurately control the thickness, low thickness uniformity, high production cost, and achieve superior processing performance. , low cost, improve the effect of trial life

Inactive Publication Date: 2017-06-13
NANJING XINYUE MATERIAL SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the prior art, most of the circuit part of the flexible circuit board is a metal layer, which has low flexibility, h

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] A kind of preparation method of graphene modified polyimide composite film, comprises the following steps:

[0031] a. Graphene preparation:

[0032] a1 Add graphite to the pre-configured strong oxidation system of nitric acid and concentrated sulfuric acid, and react for a period of time to obtain graphite oxide solution;

[0033] a2, add NaNO in the graphite oxide solution in step a1 3 After stirring, add potassium permanganate to reduce graphite oxide;

[0034] a3, after the solution in step a2 is ultrasonically treated, the graphene is obtained by centrifugal washing and drying;

[0035] b, also prepared on foot: dissolving the polyimide in a polar solvent, and adding the graphene obtained in step a and stirring to obtain a graphene-modified polyimide solution;

[0036] c. Coating and film formation: Coating the graphene-modified polyimide solution in step b on the polyimide film by coating and drying;

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Abstract

The invention discloses a method for preparing a graphene modified polyimide-based composite film and a flexible printed circuit board. The method comprises the following steps: adding graphite into a mixed system of nitric acid and concentrated sulfuric acid; sequentially adding NaNO3 and potassium permanganate, performing centrifugal washing and drying so as to obtain graphene, dissolving the graphene in a polyimide solvent to be coated on a glass plate. The formed graphene modified polyimide-based composite film serves as a circuit part of the flexible printed circuit board; the polyimide resin is dissolved in the solvent and coated on the surface of the graphene modified polyimide-based composite film and then serves as an integrated part of the flexible printed circuit board after dried; and the graphene modified polyimide-based composite film is printed to prepare the circuit board in exposure and development manners, and the circuit board has long service life and excellent electrical properties and mechanical properties.

Description

technical field [0001] The invention relates to a base material for a flexible circuit board and a circuit board thereof, in particular to a preparation method of a graphene-modified polyimide-based composite film and a flexible circuit board. Background technique [0002] Flexible circuit board, also known as "soft board", is a highly reliable and excellent flexible printed circuit board made of polyimide, with high wiring density, light weight and thin thickness. features. Flexible circuits provide excellent electrical performance, can meet the design needs of smaller and higher density mounting, and also help reduce assembly processes and enhance reliability. Flexible circuit boards are the only solution to meet the miniaturization and mobility requirements of electronic products. It can be bent, wound, and folded freely, and can withstand millions of dynamic bendings without damaging the wires. It can be arranged arbitrarily according to the spatial layout requirements...

Claims

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Application Information

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IPC IPC(8): C08J5/18C08L79/08C08K3/04C08J7/04C09D179/08H05K1/03
CPCH05K1/0353C09D179/08C08J5/18C08K3/04H05K2201/0154C08J2479/08C08L2203/16C08J2379/08C08J7/0427C08L79/08
Inventor 闵永刚翁力刘屹东齐方亚何婷婷
Owner NANJING XINYUE MATERIAL SCI & TECH