Copper plating brightener

Abstract

The invention relates to a copper plating brightener. The copper plating brightener mainly comprises copper sulfate, zinc sulfate, sulfuric acid, saccharin, citric acid, 2.4-2N methyl-pyridine, lead acetate and the like. The copper plating brightener has the characteristics of high brightness, high smoothness, high uniform plating capability, stable plating solution structure, high coating binding force, less using amount of the brightener and the like.

Description

technical field

[0001] The invention relates to a brightener for copper plating, which belongs to the field of electrochemical surface protection. Background technique

[0002] The acidic sulfate copper plating process is widely used because of its simple basic composition, stable solution, high current efficiency, high brightness, high flatness, and high uniformity of the coating can be obtained by adding an appropriate brightener.

[0003] The key to the quality of the acidic copper plating layer lies in the selection of copper plating optical agents. Therefore, for decades, a lot of research and improvement have been carried out on copper plating brighteners. In the 1970s, my country successfully developed polydisulfide Combination brighteners such as sodium dipropylsulfonate as the main component, but in use, such combination brighteners are difficult to control, and the light output speed is slow, etc., and foreign countries have introduced a variety of new copper acid b...

Examples

Embodiment Construction

[0013] 1. Accurately weigh copper sulfate 5.0g / L; zinc sulfate 96g / L; sulfuric acid 80g / L; saccharin 0.8g / L; citric acid 3.0g / L; Lead 2.0g / L.

[0014] 2. Use ionized water or distilled water to completely dissolve the solid intermediate and dilute the viscous liquid into a dilute solution. The water consumption for operation should be controlled at about 3 / 4 of the volume of the prepared solution and should not exceed the specified volume.

[0015] 3. Adjust the pH value between 4.5 and 6.0 with 1:1 ammonia water, and dilute to the specified volume.

[0016] 4. Carry out chemical degreasing and derusting treatment on the plated objects, and dry them.

[0017] 5. Put the prepared plating solution into a constant temperature water bath and heat it to 80°C-100°C. Use a graduated cylinder to measure the prepared bright solution solution and add it to the plating solution in turn, and then put the pre-treated plating solution into the plating solution. Fix the piece, hang it in t...

technical field

[0001] The invention relates to a brightener for copper plating, which belongs to the field of electrochemical surface protection. Background technique

[0002] The acidic sulfate copper plating process is widely used because of its simple basic composition, stable solution, high current efficiency, high brightness, high flatness, and high uniformity of the coating can be obtained by adding an appropriate brightener.

[0003] The key to the quality of the acidic copper plating layer lies in the selection of copper plating optical agents. Therefore, for decades, a lot of research and improvement have been carried out on copper plating brighteners. In the 1970s, my country successfully developed polydisulfide Combination brighteners such as sodium dipropylsulfonate as the main component, but in use, such combination brighteners are difficult to control, and the light output speed is slow, etc., and foreign countries have introduced a variety of new copper acid b...

Examples

Embodiment Construction

[0013] 1. Accurately weigh copper sulfate 5.0g / L; zinc sulfate 96g / L; sulfuric acid 80g / L; saccharin 0.8g / L; citric acid 3.0g / L; Lead 2.0g / L.

[0014] 2. Use ionized water or distilled water to completely dissolve the solid intermediate and dilute the viscous liquid into a dilute solution. The water consumption for operation should be controlled at about 3 / 4 of the volume of the prepared solution and should not exceed the specified volume.

[0015] 3. Adjust the pH value between 4.5 and 6.0 with 1:1 ammonia water, and dilute to the specified volume.

[0016] 4. Carry out chemical degreasing and derusting treatment on the plated objects, and dry them.

[0017] 5. Put the prepared plating solution into a constant temperature water bath and heat it to 80°C-100°C. Use a graduated cylinder to measure the prepared bright solution solution and add it to the plating solution in turn, and then put the pre-treated plating solution into the plating solution. Fix the piece, hang it in t...