Electroplate liquid for cyanide-free silver plating and electroplating method of electroplate liquid

A technology of cyanide-free silver plating and electroplating solution, applied in the field of cyanide-free electroplating, can solve problems such as environmental threats, and achieve the effects of improving sensitivity, small coating stress and reasonable formula

Active Publication Date: 2017-04-19
HUIZHOU LEADAO ELECTRONICS MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, cyanide is a highly toxic substance, whether it is produced, stored, transported or used, it poses a great threat to the environment

Method used

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  • Electroplate liquid for cyanide-free silver plating and electroplating method of electroplate liquid
  • Electroplate liquid for cyanide-free silver plating and electroplating method of electroplate liquid
  • Electroplate liquid for cyanide-free silver plating and electroplating method of electroplate liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A kind of electroplating solution of cyanide-free silver plating, comprising that mass concentration is 25g / L silver methanesulfonate, 15g / L silver carbene sulfonate, 63g / L citric acid, 11.5g / L sodium dihydrogen phosphate, 400ppm aminotrimethylene Phosphonic acid, 0.5mL / L phytic acid. The pH value of the electroplating solution is controlled at 7.

[0025] The chemical structural formula of described silver carbene sulfonate is .

[0026] A kind of electroplating method of the electroplating solution of cyanide-free silver plating, comprises the following steps:

[0027] S1. Prepare the above-mentioned electroplating solution, and adjust the temperature of the electroplating solution to be 55° C.;

[0028] S2. Use the silver plate as the anode and the piece to be plated as the cathode, apply a single pulse power supply between the anode and the cathode, the pulse width of the single pulse power supply is 120ms, the duty cycle is 55%, and the average pulse current de...

Embodiment 2

[0031] A kind of electroplating solution of cyanide-free silver plating, comprise that mass concentration is 55g / L silver methanesulfonate, 20g / L silver carbene sulfonate, 63g / L citric acid, 21.5g / L sodium dihydrogen phosphate, 400ppm aminotrimethylene Phosphonic acid, 10.5mL / L phytic acid. The pH value of the electroplating solution is controlled at 7.

[0032] The chemical structural formula of described silver carbene sulfonate is .

[0033] A kind of electroplating method of the electroplating solution of cyanide-free silver plating, comprises the following steps:

[0034] S1. Prepare the above-mentioned electroplating solution, and adjust the temperature of the electroplating solution to be 55° C.;

[0035] S2. Use the silver plate as the anode and the piece to be plated as the cathode, apply a single pulse power supply between the anode and the cathode, the pulse width of the single pulse power supply is 120ms, the duty cycle is 55%, and the average pulse current den...

Embodiment 3

[0038] A kind of electroplating solution of cyanide-free silver plating, comprises that mass concentration is 45g / L silver methanesulfonate, 25g / L silver carbene sulfonate, 13g / L citric acid, 11.5g / L sodium dihydrogen phosphate, 800ppm aminotrimethylene Phosphonic acid, 0.5mL / L phytic acid. The pH value of the electroplating solution is controlled at 7.

[0039] The chemical structural formula of described silver carbene sulfonate is .

[0040] A kind of electroplating method of the electroplating solution of cyanide-free silver plating, comprises the following steps:

[0041] S1. Prepare the above-mentioned electroplating solution, and adjust the temperature of the electroplating solution to be 55° C.;

[0042] S2. Use the silver plate as the anode and the piece to be plated as the cathode, apply a single pulse power supply between the anode and the cathode, the pulse width of the single pulse power supply is 120ms, the duty cycle is 55%, and the average pulse current densi...

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Abstract

The invention provides electroplate liquid for cyanide-free silver plating and an electroplating method. Silver methane sulfonate is adopted as main silver plating salt, sulfonic acid carbine silver is adopted as a complexing agent, other additive components are compounded for synergia, and a cyanide-free electrosilvering solution contains no cyanide, and is free of toxins and harm to the environment and the human body, reasonable in formula and good in solution stability. Pulse electroplating is adopted during electroplating, the problem that a plating layer is large in stress and brittleness, poor in binding force and the like is effectively solved, the plating layer good in bondability with a base body, small in plating layer stress and good in compactness and brightness is obtained, the obtained silver plating layer is suitable for being applied to reflecting layers, high-conductivity layers and brazing plating layers in the fields of photoelectricity and micro-electronics, and the sensitivity of signal collection can be greatly improved.

Description

technical field [0001] The invention belongs to the technical field of cyanide-free electroplating, and in particular relates to an electroplating solution for cyanide-free silver plating and an electroplating method thereof. Background technique [0002] The electroplating silver process began in 1840. The main component of the plating solution is cyanide. The plating solution is stable, the throwing ability and depth capability are relatively good, and the plating layer is crystallized and fine, which can meet the requirements of various purposes. It is still widely used today. . [0003] However, cyanide is a highly toxic substance, which poses a great threat to the environment no matter it is produced, stored, transported or used. As early as 2003, my country had requested to stop the cyanide electroplating process. The National Development and Reform Commission announced the industrial structure adjustment guidance catalog, and listed "cyanide-containing electroplating...

Claims

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Application Information

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IPC IPC(8): C25D3/46C25D5/18
CPCC25D3/46C25D5/18
Inventor 崔皓博黄兴桥
Owner HUIZHOU LEADAO ELECTRONICS MATERIAL
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