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Electrophoretic preparation method of RCC (resin coated copper foil)

A technology of electrophoresis and copper foil, applied in the direction of electrophoretic plating, electrolytic coating, coating, etc., can solve the problems of environmental pollution, long process flow, VOC, etc., and achieve the effect of low cost, smooth surface and good bonding force

Inactive Publication Date: 2011-05-25
JIANGXI UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a RCC copper foil that does not use VOC to pollute the environment and has an ultra-thick coating resin for the problems of long process flow of the existing coating method, high precision requirements for production machinery, and the use of a large amount of VOC that pollutes the environment. electrophoretic preparation method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: 1) Reaction of epoxy resin and polyol amine to obtain water-based epoxy resin through neutralization of organic acid to form a salt, and the adduct of epoxy resin and polyamine is capped with reactive diluent and then neutralized with organic acid Salt to obtain water-based epoxy curing agent, get water-based epoxy resin and water-based epoxy curing agent by 3: 1 (weight ratio) to prepare an aqueous solution with a solid content of 10% as cathodic electrophoretic liquid; 2) copper foil is chemically degreased , derusting, and rinsed with deionized water as the cathode, and the stainless steel sheet as the anode, adjust the pH value of the electrophoretic solution to 6.5, the temperature is 18°C, and the electrophoresis is performed for 12 minutes under the conditions of a pole distance of 45mm and an electrophoresis voltage of 4 volts; After washing with deionized water, dry at 120°C for 30 minutes. The thickness of the RCC copper foil resin layer is 40 μm, wh...

Embodiment 2

[0015] Embodiment 2: The difference from Embodiment 1 is that the electrophoresis voltage is 36 volts, the electrophoresis is 2 minutes, the thickness of the RCC copper foil resin layer is 30 μm, and no VOC that pollutes the environment is generated.

Embodiment 3

[0016] Embodiment 3: 1) Epoxy resin and polyol amine are reacted and neutralized by organic acid to form a salt to obtain water-based epoxy resin, and the adduct of epoxy resin and polyamine is capped with a reactive diluent and then neutralized by organic acid Form salt to obtain water-based epoxy curing agent, get water-based epoxy resin and water-based epoxy curing agent by 4: 1 (weight ratio) and prepare the aqueous solution of solid content 15% as cathodic electrophoretic liquid stand-by; 2) copper foil is through chemical degreasing , derusting, and rinsed with deionized water as the cathode, and the stainless steel sheet as the anode, adjust the pH value of the electrophoretic solution to 6.5, the temperature is 25°C, and the electrophoresis is performed for 6 minutes under the conditions of a pole distance of 40 mm and an electrophoretic voltage of 18 volts; After washing with deionized water, dry at 120°C for 30 minutes. The thickness of the RCC copper foil resin layer...

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Abstract

The invention relates to new technology for preparing an RCC (resin coated copper foil), in particular to an electrophoretic preparation method of the RCC. The method provided by the invention comprises the following steps: 1) preparing aqueous solution with solid content of 10-30% from a water borne epoxy resin and a water borne epoxy hardener at a weight ratio of (3-5):1, wherein the aqueous solution is used as cathode electrophoresis liquid for later use; 2) adjusting the pH value of the electrophoresis liquid to be 6.0-7.0 and the temperature to be 18-30 DEG C, taking the copper foil as cathode and the inert metal as anode and performing electrophoresis for 2-12 minutes at a polar distance of 20-45 millimeters and electrophoresis voltage of 4-36V; and 3) washing an electrophoresis film with deionized water and then drying the electrophoresis film for 5-30 minutes at the temperature of 120-160 DEG C to obtain the RCC. The method has the following advantages: VOC (volatile organic compounds) are not released; environmental pollution is avoided; the cost is low; and a resin coating with transfinite thickness (30-150 microns) can be obtained.

Description

technical field [0001] The invention relates to a new technology for preparing RCC copper foil, in particular to an electrophoretic preparation method of RCC copper foil. technical background [0002] Resin-coated copper foil (RCC) is an important substrate for manufacturing HDI / BUM boards, and there is a high requirement for the consistency of the thickness of the RCC resin layer. Most of the laminated materials currently used in China are epoxy RCC. The existing preparation process is that the rough surface of the electrolytic copper foil is roughened and anti-oxidation pre-treated, and then coated on the rough surface of the copper foil by a high-precision coating machine One or two layers of specially composed resin glue, and then dried to remove the solvent to obtain RCC. It can be seen that the preparation of RCC by the coating method not only has a long process route, many steps, and high pre-treatment requirements, but also requires a very high precision of the coat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/04C25D13/16
Inventor 陈火平李敏周阳黄永发王平张彩霞
Owner JIANGXI UNIV OF SCI & TECH
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