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A surface treatment process for rolled copper foil

A technology of rolling copper foil and surface treatment, which is applied in the field of surface treatment technology of rolled copper foil, can solve the problems of poor heat resistance, corrosion resistance, low copper foil anti-peeling strength, and not being environmentally friendly, and achieve low roughness and flatness Good sex, the effect of improving the binding force

Active Publication Date: 2021-01-15
JIANGXI PROVINCE HANGYU NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the copper foil prepared by the traditional copper foil surface treatment process not only has low peel strength, poor heat resistance and corrosion resistance, but also introduces harmful elements such as chromium and arsenic, which is not environmentally friendly and does not comply with EU ROHS regulations.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A surface treatment process for rolled copper foil, comprising the following steps:

[0038] S1. Cleaning: Soak the rolled copper foil in the cleaning solution for cleaning, take it out, wash it with hot water at 50°C three times, and dry it for later use; when the rolled copper foil is just rolled, its surface is relatively smooth, so it needs to be removed To ensure the surface of the rolled copper foil is cleaned, the rolled copper foil is soaked in the cleaning solution three times for cleaning, soaking for 1 minute each time, and using a temperature of 50°C after each soaking. hot water wash three times;

[0039] In order to effectively remove the oil stain and oxide layer on the surface of the rolled copper foil, this embodiment optimizes the cleaning solution, which consists of the following components by weight percentage:

[0040] 15% sodium dodecylbenzenesulfonate, 10% fatty alcohol polyoxyethylene ether, 8% sulfuric acid, 1% ethanol, 1% potassium pyrophospha...

Embodiment 2

[0057] A surface treatment process for rolled copper foil, comprising the following steps:

[0058] S1. Cleaning: Soak the rolled copper foil in the cleaning solution for cleaning, take it out, wash it with hot water at 65°C three times, and dry it for later use; when the rolled copper foil is just rolled, its surface is relatively smooth, so it needs to be removed to clean the surface of the rolled copper foil, soak the rolled copper foil three times in the cleaning solution, soak for 1.5 minutes each time, and use 65 ℃ hot water wash three times;

[0059] In order to effectively remove the oil stain and oxide layer on the surface of the rolled copper foil, this embodiment optimizes the cleaning solution, which consists of the following components by weight percentage:

[0060] 18% sodium dodecylbenzenesulfonate, 12.5% ​​fatty alcohol polyoxyethylene ether, 10% sulfuric acid, 2% ethanol, 2% potassium pyrophosphate and 55.5% pure water;

[0061] The cleaning solution is reas...

Embodiment 3

[0077] A surface treatment process for rolled copper foil, comprising the following steps:

[0078] S1. Cleaning: soak the rolled copper foil in the cleaning solution for cleaning, take it out and wash it with 80°C hot water three times, and dry it for later use; when the rolled copper foil is just rolled, its surface is relatively smooth, so it needs to be removed To ensure the surface of the rolled copper foil is cleaned, the rolled copper foil is soaked in the cleaning solution three times for cleaning, soaking for 2 minutes each time, and using 80°C after each soaking. hot water wash three times;

[0079] In order to effectively remove the oil stain and oxide layer on the surface of the rolled copper foil, this embodiment optimizes the cleaning solution, which consists of the following components by weight percentage:

[0080] 20% sodium dodecylbenzenesulfonate, 15% fatty alcohol polyoxyethylene ether, 12% sulfuric acid, 3% ethanol, 3% potassium pyrophosphate and 47% pure...

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Abstract

The invention relates to the technical field of the copper foil production technology, in particular to a surface treatment technology for rolled copper foil. According to the characteristics of the rolled copper foil, optimization and improvement are conducted on various procedures of surface treatment on the rolled copper foil, chromium, arsenic and other harmful elements are not introduced in the whole process, complete environment friendliness is achieved, and the European Union ROHS regulation is reached. The rolled copper foil obtained after cleaning, first-time roughening, first-time curing, second-time roughening, second-time curing, nickel lanthanum alloy heat resisting layer plating, tungsten zinc alloy heat resisting layer plating, passivation, drying, silane coupling agent treatment and other procedures is low in surface roughness and has excellent heat resistance, corrosion resistance and high anti-peeling strength, and the higher requirements of industrial production canbe met.

Description

technical field [0001] The invention relates to the technical field of copper foil production technology, in particular to a surface treatment process of rolled copper foil. Background technique [0002] Copper foil is one of the important materials for manufacturing printed circuit boards, and the quality of copper foil has an important impact on the performance of printed circuit boards. According to the difference in production process, copper foil mainly includes electrolytic copper foil and calendered copper foil. Calendered copper foil has better bending performance than electrolytic copper foil, so it is more suitable for the application of flexible printed circuit boards. [0003] Before copper foil is used, it usually needs to be pressed with resin substrate to form a copper clad laminate, and then it can be applied to the circuit board. Oxidation resistance and other properties ensure the performance of printed circuit boards. Copper foils need to be surface treat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/38C23G1/10C25D3/56C23C22/10C25D7/06
CPCC23C22/10C23C2222/20C23G1/103C25D3/56C25D3/562C25D5/38C25D7/0614
Inventor 张运东
Owner JIANGXI PROVINCE HANGYU NEW MATERIAL CO LTD
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