A kind of conductive film, the preparation method of conductive film and the ink used therefor

A conductive film and ink technology, which is applied in the field of conductive film, ink, and conductive film preparation, can solve the problems of poor conductivity of conductive film, low conductivity of carbon materials, and inferior metal fillers, etc., and achieve the effect of low cost

Active Publication Date: 2018-03-16
SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, some research and products have used aluminum, carbon, copper or their composite materials as fillers to prepare conductive inks, but there are still various problems. For example, although carbon materials are low in cost, their conductivity is far inferior to that of metals. Fillers, and metal fillers such as aluminum and copper have great advantages in cost and conductivity, but after being used in conductive inks, the conductivity of the conductive film is poor after the conductive ink is printed to form a conductive film.

Method used

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  • A kind of conductive film, the preparation method of conductive film and the ink used therefor
  • A kind of conductive film, the preparation method of conductive film and the ink used therefor
  • A kind of conductive film, the preparation method of conductive film and the ink used therefor

Examples

Experimental program
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Effect test

preparation example Construction

[0017] Such as figure 1 Shown, be the preparation method of the conductive film of this specific embodiment, comprise the following steps:

[0018] 1) Prepare ink and electroless plating solution, wherein the ink includes a main component, an additive and a solvent, and the main component is composed of a photocurable resin with a mass fraction of 10% to 60% and a metal filler with a mass fraction of 40% to 90% , the metal in the filler is more active than the target metal, and the electroless plating solution is a plating solution corresponding to the target metal ion; wherein, the target metal is the type of metal in the conductive film to be prepared.

[0019] Here, the target metal is the kind of metal that plays a conductive role in the conductive film to be finally formed. For example, to make a copper conductive film, then copper is the target metal, and the electroless plating solution is an electroless copper plating solution; to make a nickel conductive film, then n...

experiment example 1

[0035] In this experimental example, epoxy acrylate free radical photocurable resin was used as a binder, and 50 nanometer zinc powder was used as a filler to prepare a main component with a zinc content of 60%, and then mixed with additives and solvents to prepare an ink. The main component of the electroless plating solution is copper sulfate, with a small amount of stabilizer and buffer added. The selected lighting equipment has two lamp heads, one is an ultraviolet lamp tube with a power of 50w, and the other is a xenon flash tube with a single pulse energy of 200J, a pulse width of 2 milliseconds, and a frequency of 10Hz. The irradiation area of ​​the two lamp heads is the same.

[0036] Printed by screen printing technology, the substrate is PET. A patterned circuit was printed on a PET substrate by screen printing, and then baked at 80° C. for 30 minutes to obtain a circuit pattern formed by a prepreg film. Such as figure 2 Shown is the SEM image of the cross-section...

experiment example 2

[0048] The difference between this experimental example and experimental example 1 is that this experimental example adopts a lithography process, while the experimental example 1 adopts a screen printing process.

[0049] In this experimental example, a cationic epoxy compound photocurable resin was used as a binder and 500 nanometer zinc powder was used as a filler to prepare a main component with a zinc content of 65%, and then mixed with additives and solvents to prepare an ink. The types and amounts of solvents and additives make the ink suitable for lithographic printing. The main component of the electroless plating solution is copper sulfate, with a small amount of stabilizer and buffer added. The selected lighting equipment has two lamp heads, one is an ultraviolet lamp tube with a power of 50w, and the other is a xenon flash tube with a single pulse energy of 200J, a pulse length of 5 milliseconds, and a frequency of 10Hz. The irradiation area of ​​the two lamp heads...

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Abstract

The invention discloses a conductive film, a method for preparing the conductive film and an ink used therefor. The preparation method comprises the following steps: 1) preparing ink and electroless plating solution; the ink includes a main component, an additive and a solvent, and the main component It consists of a photocurable resin with a mass fraction of 10% to 60% and a metal filler with a mass fraction of 40% to 90%. The metal in the filler is more active than the target metal; the electroless plating solution is the plating solution corresponding to the target metal ion. solution; wherein, the target metal is the type of metal that plays a conductive role in the conductive film to be prepared; 2) printing and drying; 3) electroless plating treatment; 4) light treatment. The prepared conductive film includes an adhesive and a metal film, the metal film is bonded to the substrate through the adhesive, and the metal film is a continuous metal film formed by sintering metal particles. In the ink of the invention, low-cost metals can be used as fillers, so that the cost is low, and the conductivity of the prepared conductive film is also good.

Description

【Technical field】 [0001] The invention relates to printed electronic technology, in particular to a conductive film, a method for preparing the conductive film and ink used therein. 【Background technique】 [0002] With the development of printed electronics technology, more and more electronic products have to use various printing methods to form their conductive parts during their manufacturing process, such as inkjet printing, screen printing, lithography, gravure Printing and 3D printing and other technologies, these printed electronics technologies have the dual advantages of efficiency and cost compared with traditional circuit manufacturing technologies. The conductive ink technology that is inseparable from it is also changing with each passing day. The conductive ink currently used in printed electronics technology is mainly filled with silver. Because it has excellent conductivity and good chemical stability, it can prepare conductive ink with stable performance. p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B13/00H01B1/22C09D11/101C09D11/03
Inventor 杨诚刘静平
Owner SHENZHEN GRADUATE SCHOOL TSINGHUA UNIV
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