Method for displacement plating of Ni-S alloy barrier layer on copper foil, and chemical passivation method of barrier layer
A technology of chemical passivation and barrier layer, which is applied in the direction of liquid chemical plating, metal material coating process, coating, etc., can solve the problems of low peel strength, complicated preparation method of barrier layer, poor high temperature oxidation resistance, etc., to achieve Improved high temperature resistance to oxidation and discoloration, excellent resistance to copper ion migration, and simple equipment
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specific Embodiment approach 1
[0028] Specific implementation mode 1: The method of substitution plating Ni-S alloy barrier layer on copper foil of this embodiment is carried out in the following steps:
[0029] 1. The preparation of replacement nickel plating: a. The concentration of boric acid is 5-40g / L, the concentration of organic acid or its sodium salt is 0-100g / L, the concentration of sulfur-containing compounds is 7-200g / L, nickel salt The concentration of 5~150g / L is respectively weighed boric acid, organic acid or its sodium salt, sulfur compound and nickel salt; b. The boric acid weighed in step a is dissolved in deionized water, and then the pH value is adjusted to 2.0 to obtain solution A; c. Heat the solution A obtained in step b to 50-60°C, then add the sulfur-containing compound weighed in step a, and stir to dissolve to obtain solution B; d. The acid or its sodium salt is added to solution B, and the pH value is adjusted to 1.0-6.0 with sulfuric acid or sodium hydroxide solution to obtain sol...
specific Embodiment approach 2
[0033] Specific embodiment two: This embodiment is different from the specific embodiment one in that the organic acids described in step one are citric acid, lactic acid, malic acid, gluconic acid, propionic acid, adipic acid, succinic acid, glycine, and propionic acid. One or a combination of several of acid, glutamic acid and aspartic acid. Others are the same as the first embodiment.
[0034] When the organic acid is a composition in this embodiment, each composition is combined in an arbitrary ratio.
specific Embodiment approach 3
[0035] Specific embodiment three: This embodiment is different from specific embodiment one or two in that the electrochemical degreasing solution described in step two has a sodium carbonate concentration of 10-40g / L and a trisodium phosphate concentration of 10-40g / L, the concentration of sodium silicate is 2-10g / L. Sodium carbonate, trisodium phosphate and sodium silicate are added to water and mixed uniformly. Others are the same as the first or second embodiment.
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