Copper surface roughening agent capable of being electrolytically regenerated and recycled and preparation method thereof

An electrolytic regeneration and roughening agent technology, which is applied in the field of metal etching, can solve the problems of waste of resources, low uniformity of copper surface etching, and slow etching speed, etc., to reduce waste water discharge, improve copper surface adhesion and adhesion stability, The effect of promoting the diffusion rate

Inactive Publication Date: 2021-02-05
深圳市煜杰兴电子材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, sulfuric acid-hydrogen peroxide, persulfide and other systems are generally used for copper roughening, but peroxides have the problem of large heat release, while iron-based etching solutions have the advantages of simple formula and low price, and etch through metal redox , has high copper melting ability and low cost, but has the disadvantages of slow etching speed and low etching ability, which makes the roughness and copper surface etching uniformity low, and low roughness will cause copper surface adhesion Decline, and uneven etching will affect the adhesion stability of the copper surface and the substrate, and when using an iron-based roughening agent for etching, it generally needs to be around 40°C, and the etch rate stability is poor
[0004] And in the process of etching roughening, Fe3+ in the roughening agent gradually turns into Fe2+ and loses the etching ability. At the same time, the total iron conten

Method used

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  • Copper surface roughening agent capable of being electrolytically regenerated and recycled and preparation method thereof
  • Copper surface roughening agent capable of being electrolytically regenerated and recycled and preparation method thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0068]Example 1

[0069]This example provides a roughening agent. The raw materials for the roughening agent are prepared by weight concentration, including 45g / L inorganic acid, 25g / L iron salt, 0.7g / L surfactant, 0.4g / L defoamer , The solvent is water; the inorganic acid includes hydrochloric acid and sulfuric acid with a weight ratio of 1:0.4; the iron salt includes ferric chloride and iron sulfate with a weight ratio of 1:0.8; the surfactant is perfluorohexylsulfon The weight ratio of acid and fluorine-containing alkyl alcohol polyoxyethylene ether is 1:0.4; the defoamer is OP-10.

[0070]The fluorine-containing alkyl alcohol polyoxyethylene ether was purchased from FEO-300.

[0071]This example also provides a method for preparing the copper surface roughening agent as described above, which includes adding an inorganic acid to water, and after mixing, adding the raw materials for the roughening agent except the inorganic acid and water, and mixing to obtain the The copper surface roug...

Example Embodiment

[0072]Example 2

[0073]This example provides a roughening agent. The raw materials for the roughening agent are prepared by weight concentration, including 45g / L inorganic acid, 25g / L iron salt, 0.7g / L surfactant, 1g / L accelerator, 0.4 g / L defoamer, the solvent is water; the inorganic acid includes hydrochloric acid and sulfuric acid, and the weight ratio is 1:0.4; the iron salt includes ferric chloride and iron sulfate, and the weight ratio is 1:0.8; the surface activity The agent is perfluorohexyl sulfonic acid and fluorine-containing alkyl alcohol polyoxyethylene ether, the weight ratio is 1:0.4; the accelerator includes sucrose monolaurate and hydroxybenzotriazole, the weight ratio is 1:4; The defoamer is OP-10.

[0074]The fluorine-containing alkyl alcohol polyoxyethylene ether was purchased from FEO-300.

[0075]This example also provides a method for preparing the copper surface roughening agent as described above, which includes adding an inorganic acid to water, and after mixing, ...

Example Embodiment

[0076]Example 3

[0077]This example provides a roughening agent. The raw materials for the roughening agent are prepared by weight concentration, including 40g / L mineral acid, 20g / L iron salt, 0.5g / L surfactant, 0.7g / L accelerator, 0.3g / L inhibitor, 0.3g / L defoamer, the solvent is water; the inorganic acid includes hydrochloric acid and sulfuric acid in a weight ratio of 1:0.3, and the iron salt includes ferric chloride and iron sulfate, and the weight ratio is 1:1; the surfactant is perfluorohexyl sulfonic acid and fluoroalkyl alcohol polyoxyethylene ether, the weight ratio is 1:0.3; the accelerator includes sucrose monolaurate and hydroxybenzotriazole , The weight ratio is 1:5; the inhibitor is polyoxypropylene diamine and pyridine, and the weight ratio is 1:1; the defoamer is OP-10.

[0078]The fluorine-containing alkyl alcohol polyoxyethylene ether was purchased from FEO-300.

[0079]The polyoxypropylene diamine was purchased from Huntsman Jeffamine D series D-230.

[0080]This example al...

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Abstract

The invention relates to the technical field of metal etching, in particular to a copper surface roughening agent capable of being electrolytically regenerated and recycled and a preparation method thereof. The coarsening agent can be used for coarsening a copper surface in the manufacturing process of a PCB and an FPC and can be recycled and regenerated in an electrolysis mode to reduce wastewater discharge in an existing operation mode. Ferric iron and the copper surface are promoted to be in contact to generate a redox reaction by using ferric salt in the environment of an inorganic acid aqueous solution, part of copper atoms on the copper surface generate divalent copper ions and dispersed in the roughening agent to generate etching, an applicant finds that by adding a surfactant and the like, the diffusion rate of ferric iron to the copper surface can be increased, the dispersion of the bivalent copper ions into the solution can be promoted, and the etching amount at normal temperature within a short time can be increased; and by selecting proper accelerators, inhibitors and the like, the roughness and the uniformity degree of etching are favorably regulated and controlled, and the adhesion force and the adhesion stability of the copper surface are favorably improved.

Description

Technical field[0001]The present invention relates to the technical field of metal etching. More specifically, the present invention relates to a copper surface roughening agent that can be recycled by electrolytic regeneration and a preparation method thereof.Background technique[0002]Printed circuit boards, such as PCB and FPC, are the basic components of various consumer electronic products and investment electronic products, and are also an important part of modern electronic construction technology. Stimulated by the rapid development of the information industry, the production scale of printed circuits has become larger and larger. As the main product of electronic systems, it has been widely used in all electronic products. Copper surface pretreatment in PCB and FPC processes. Copper surface roughening is an important step in copper surface treatment. On the one hand, roughening requires effective removal of impurities, oxides and other residues from the copper surface (inclu...

Claims

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Application Information

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IPC IPC(8): C23F1/18C23F11/14C23F11/10
CPCC23F1/18C23F11/10C23F11/141
Inventor 费世兵张贵贤黄智华
Owner 深圳市煜杰兴电子材料有限公司
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