A kind of treatment method of molybdenum copper material before gold plating

A treatment method and molybdenum-copper technology are applied in the field of treatment before gold-plating molybdenum-copper materials, which can solve the problems of excessive corrosion of materials and large pollution in pre-chromating treatment, and achieve the effect of avoiding excessive corrosion, reducing pollution and ensuring brazing properties.

Active Publication Date: 2015-11-18
CHENGDU YAGUANG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in this treatment method, the anodic etching treatment is easy to cause over-corrosion of the material, and the pre-chrome plating treatment is more polluted

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] ① Degreasing

[0043] 50g of degreasing powder was dissolved in 1L of water to obtain a degreasing powder solution with a concentration of 50g / L.

[0044] Put the molybdenum-copper material in the degreasing powder solution with a concentration of 50 g / L, and perform ultrasonic cleaning for 5 minutes at a temperature of 80°C.

[0045] ②Chemical roughening

[0046] Dissolve 100g of sodium hydroxide and 10mL of 30% hydrogen peroxide in 990mL of water to obtain a chemical roughening solution.

[0047] Immerse the molybdenum-copper material in the chemical roughening solution at 90°C and shake it for 80 seconds. A uniform red copper film is formed on the surface, and the escape of air bubbles on the surface is slowed down. After the molybdenum-copper material is taken out, it is thoroughly cleaned in tap water.

[0048] ③Chemical stripping

[0049] Dissolve 300mL of concentrated sulfuric acid, 300mL of concentrated nitric acid, and 10mL of concentrated hydrochloric acid ...

Embodiment 2

[0068] ① Degreasing

[0069] 50g of degreasing powder was dissolved in 1L of water to obtain a degreasing powder solution with a concentration of 50g / L.

[0070] Put the molybdenum-copper material in the degreasing powder solution with a concentration of 50 g / L, and perform ultrasonic cleaning for 5 minutes at a temperature of 80°C.

[0071] ②Chemical roughening

[0072] Dissolve 120g of sodium hydroxide and 12mL of 30% hydrogen peroxide in 988mL of water to obtain a chemical roughening solution.

[0073] Immerse the molybdenum-copper material in the chemical roughening solution at 96°C and shake it for 60 seconds. A uniform red copper film is formed on the surface, and the escape of air bubbles on the surface is slowed down. After the molybdenum-copper material is taken out, it is thoroughly cleaned in tap water.

[0074] ③Chemical stripping

[0075] Dissolve 350mL of concentrated sulfuric acid, 350mL of concentrated nitric acid, and 10mL of concentrated hydrochloric acid ...

Embodiment 3

[0094] ① Degreasing

[0095] 50g of degreasing powder was dissolved in 1L of water to obtain a degreasing powder solution with a concentration of 50g / L.

[0096] Put the molybdenum-copper material in the degreasing powder solution with a concentration of 50 g / L, and perform ultrasonic cleaning for 5 minutes at a temperature of 80°C.

[0097] ②Chemical roughening

[0098] Dissolve 150g of sodium hydroxide and 15mL of 30% hydrogen peroxide in 985mL of water to obtain a chemical roughening solution.

[0099] Immerse the molybdenum-copper material in the chemical roughening solution at 99°C and shake it for 60 seconds. A uniform red copper film is formed on the surface, and the escape of air bubbles on the surface is slowed down. After the molybdenum-copper material is taken out, it is thoroughly cleaned in tap water.

[0100] ③Chemical stripping

[0101] Dissolve 400mL of concentrated sulfuric acid, 400mL of concentrated nitric acid, and 15mL of concentrated hydrochloric acid ...

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Abstract

The present invention provides a treatment method for a copper-molybdenum material before gold-plating. The method comprises the steps of: performing roughening treatment to the copper-molybdenum material after deoiling treatment in a chemical roughening solution; performing stripping treatment to the copper-molybdenum material after the roughening treatment in a chemical stripping liquid; after activation of the copper-molybdenum material after stripping treatment, performing a first nickel plating treatment; in the protective gas atmosphere, performing heat treatment to the first nickel-plated copper-molybdenum material at 900 ~ 980 DEG C; and performing a second nickel plating treatment to the copper-molybdenum material after the heat treatment. According to the present invention, excessive corrosion of copper-molybdenum material is prevented, which is conducive to improve the binding force in the subsequent nickel plating treatment, and ensures the nickel plating layer to deposit on a substrate; pollution is little; and the binding force of the nickel plating layer and the brazability are good.

Description

technical field [0001] The invention relates to the field of surface treatment, in particular to a treatment method for molybdenum copper material before gold plating. Background technique [0002] Molybdenum copper material is a composite material composed of metal elements molybdenum and copper, which has many excellent properties such as high electrical conductivity, high thermal conductivity, small expansion coefficient, good corrosion resistance, non-magnetic and good processing performance. What is particularly valuable is that the thermal expansion coefficient and thermal conductivity of the molybdenum copper material can be designed by adjusting the composition of the material, which brings great convenience to the application of the material. Molybdenum copper material is widely used in metallurgy, machinery, petrochemical, national defense, aerospace, electronics and other fields, especially in microelectronics and power electronic devices, as a package of microwav...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D5/34C25D5/38C25D5/14
Inventor 许小琴
Owner CHENGDU YAGUANG ELECTRONICS
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