Flexible conductive film and preparation method thereof

A flexible conductive and thin film technology, which is applied in the direction of equipment for manufacturing conductive/semiconductive layers, cable/conductor manufacturing, conductive layers on insulating carriers, etc., can solve the problem of shortening the sintering time of nano-inks, high cost of conductive films, and electrical problems. Migrate conductivity and other issues to achieve the effect of avoiding substrate damage, dense tissue and low porosity

Active Publication Date: 2021-09-17
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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  • Abstract
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  • Application Information

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Problems solved by technology

[0005]Aiming at the above technical problems, the present invention discloses a flexible conductive film and a preparation method thereof, which utilizes intense pulsed light sintering to sinter and print nanoscale metal conductive Ink, while ensuring stable performance, greatly shortens the sintering time of nano-ink, achieves simple process and high-efficiency preparation, and solves the problem of poor reliability caused by high cost of conductive film, serious electromigration, poor conductivity, and easy oxidation in industrial applications. question

Method used

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  • Flexible conductive film and preparation method thereof
  • Flexible conductive film and preparation method thereof
  • Flexible conductive film and preparation method thereof

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preparation example Construction

[0043] A method for preparing a flexible conductive film, comprising:

[0044] Step 1: Synthesis of metal nanoparticles (gold, silver, copper, nickel, etc.)

[0045] Add an appropriate amount of metal salt to the organic solvent, mix well, stir continuously, heat to 50~80°C, and obtain solution A after the metal salt is completely dissolved; add appropriate amount of reducing agent and protective agent to the organic solvent, mix evenly, stir continuously, and heat to 50~80°C, after completely dissolving to obtain solution B; add freshly prepared solution A to freshly prepared solution B, and keep stirring the mixed solution, heat to 60~90°C, and react for 60~90 min to obtain Metal nanoparticle dispersion: the metal nanoparticle dispersion is cooled to room temperature and then centrifuged, and washed and centrifuged multiple times with one or more mixed washing solutions of absolute ethanol, acetone, and deionized water. Add a certain amount of centrifuged-cleaned metal nano...

Embodiment 1

[0065] (1) Add an appropriate amount of metal salt to the organic solvent, mix well, stir continuously, heat to 50°C, and obtain solution A after the metal salt is completely dissolved; add an appropriate amount of reducing agent and protective agent to the organic solvent, mix evenly, stir continuously, and heat to 50°C, solution B was obtained after complete dissolution. The freshly prepared solution A was added to the freshly prepared solution B, and the mixed solution was stirred continuously, heated to 60 °C, and reacted for 60 min to obtain the metal nanoparticle dispersion.

[0066] (2) Cool the metal nanoparticle dispersion obtained in step (1) to room temperature and then centrifuge it, and wash it several times with absolute ethanol, acetone, or a mixture of two or more of them in ionized water , centrifugal. Weigh metal nanoparticles with a solid content of 50% and organic solvents (ethyl cellulose, ethyl acetate, 1-2-propanediol, defoamer, terpineol, etc. in a mas...

Embodiment 2

[0073] (1) Add an appropriate amount of metal salt to the organic solvent, mix well, stir continuously, heat to 50°C, and obtain solution A after the metal salt is completely dissolved; add an appropriate amount of reducing agent and protective agent to the organic solvent, mix evenly, stir continuously, and heat to 50°C, solution B was obtained after complete dissolution. The freshly prepared solution A was added to the freshly prepared solution B, and the mixed solution was stirred continuously, heated to 60 °C, and reacted for 60 min to obtain the metal nanoparticle dispersion. Among them, metal salts are

[0074] (2) Cool the metal nanoparticle dispersion obtained in step (1) to room temperature and then centrifuge it, and wash it several times with absolute ethanol, acetone, or a mixture of two or more of them in ionized water , centrifugal. Weigh metal nanoparticles with a solid content of 50% and an organic solvent (ethyl cellulose, ethyl acetate, 1-2-propylene glycol...

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Abstract

The invention provides a flexible conductive film and a preparation method thereof, and the preparation method comprises the following steps: S1, preparing nano-metal conductive ink, the mass fraction of nano-metal particles being 30%-70%; S2, printing the nano-metal conductive ink on a flexible substrate, after the ink is naturally air-dried, preheating the flexible substrate printed with the nano-metal conductive ink at the treatment temperature of 50-100 DEG C, and volatilizing residual organic matters to preliminarily form a sintering neck; and then carrying out intense pulsed light sintering to obtain the flexible conductive film with high conductivity and high oxidation resistance. The energy of the intense pulsed light sintering is 0-8.04 J/cm<2>. By adopting the technical scheme, the flexible substrate is not damaged, the sintering time is short, the efficiency is high, the sintering structure is compact, the porosity is low, the flexible electrode can be prepared in a large area, and the prepared electrode has ultrahigh conductivity and high oxidation resistance.

Description

technical field [0001] The invention belongs to the technical field of preparation of conductive films, in particular to a flexible conductive film and a preparation method thereof. Background technique [0002] With the continuous development of e-commerce, Internet of Things, smart home, wearable devices and cloud computing, the demand for electronic components continues to increase. Mainstream electronic components are mainly manufactured using photolithography processing technology, the process is complicated, the required instruments are expensive, the cost is high, and it is difficult to achieve large-scale and large-area flexible manufacturing. The printed electronics technology uses the traditional printing process to print electronic inks with specific functions on substrates of different properties to make electronic components and circuits. The personalized production of cost has made great progress in many fields. [0003] Due to its broad market prospect, the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14H01B13/00C09D11/52
CPCC09D11/52H01B13/0026H01B5/14
Inventor 计红军徐诗韵张文武
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
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