METHOD OF COPPER COATINGS ELECTROLYTIC DEPOSITION Russian patent published in 2017 - IPC C25D3/38 C25D5/18 

FIELD: metallurgy.

SUBSTANCE: electrolytic deposition method of the copper coatings from electrolyte, containing copper sulfate pentahydrate and sulfuric acid, using the reverse impulse current, is that the concentration of the copper sulfate pentahydrate is 80-250 g/l, the concentration of sulfuric acid is 100-150 g/l, the current density in the cathode impulses is 2.5-4.0 A/dm², the current density in the anode impulses is 2.5-10.0 A/dm², the duration of the cathode impulses is 100-300 s, the duration of the anode impulses is 30-100 s, while simultaneous observance of the term, that the product ratio of the cathode impulse duration and the cathode current density by the product of the anode impulse duration and the anode current density is to be within 2.0-3.0.

EFFECT: coating uniformity increase with minimum thickness deviations from the mean value, the intensification of the coating process by increasing the effective current density.

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