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Chemical plating dispergator and preparation method of dispergation working solution

A chemical and adhesive technology, which is applied in the field of debonding agent in electroless plating, can solve problems such as large consumption, missing plating of electroless plating, and harsh working environment, so as to improve production efficiency, facilitate operation and maintenance, improve stability and The effect of practical life

Inactive Publication Date: 2014-06-25
NANJING DADI REFRIGERATION FOOD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The degumming agent in the current production process is usually directly treated with hydrochloric acid, sulfuric acid or sodium hydroxide. This common degumming agent is unstable during the production process and must be reconstituted after working for 4 hours, and it is difficult to control its degumming. The degree of degumming leads to missing plating in the subsequent chemical plating; at the same time, the consumption is large and the working environment is harsh

Method used

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings.

[0008] An electroless plating debonding agent, which includes 75% sodium sulfate, 15% potassium sodium tartrate and 10% citric acid. Add pure water into the electroplating tank, first add 15g / L sulfuric acid and stir evenly, then add 50g / L of the above-mentioned electroless plating debonding agent, heat to 40-60°C to completely dissolve, and always turn on the filter during use, so that it can be filtered Remove the divalent tin salt or tetravalent tin salt precipitate brought by the palladium catalyst working solution, and prolong the working life of the degumming working solution.

[0009] In the whole pre-treatment of electroless plating, the quality of debonding treatment is one of the important factors affecting the quality of subsequent electroless copper plating or electroless nickel plating, and there is currently no better maintenance method to ensure that the...

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Abstract

The invention discloses a chemical plating dispergator and a preparation method of dispergation working solution. The chemical plating dispergator comprises the following substances in percentages by weight: 50-85% of sodium sulfate, 8-15% of potassium sodium tartrate and 8-15% of citric acid. According to the invention, through compounding organic acids, working stability and physical life of the dispergator are greatly improved, so that the production efficiency of chemical plating is provided; and meanwhile, the dispergator is more convenient for operation and maintenance.

Description

technical field [0001] The invention belongs to the technical field of electroplating, in particular to the technology of debonding agent in electroless plating. Background technique [0002] In the electroless plating process, after the ABS workpiece is roughened, the hexavalent chromium ion is reduced by a reducing agent, and then immersed in the palladium catalytic working solution for catalytic activation, so that the surface of the ABS workpiece is enriched with a large amount of palladium colloid, and then washed with water Immerse in the degumming working solution for degumming treatment, and finally immerse in chemical copper or chemical nickel to deposit a copper or nickel layer. The role of the debonding agent treatment in this process is to remove the tin ions in the palladium colloid enriched on the surface of the ABS workpiece to expose the active sites of the palladium metal, so that the subsequent chemical copper or chemical nickel is deposited on the bare pal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/30
Inventor 陈大弟
Owner NANJING DADI REFRIGERATION FOOD