Nickel silvering process in process of electroplating LED (Light Emitting Diode) bracket

Abstract

The invention discloses a nickel silvering process for replacing copper silvering in the process of electroplating an LED bracket; the nickel silvering process comprises the steps of activating, pre-silvering and silvering, wherein the mixed solution of editpotassium cyanide and potassium carbonate is adopted in the activating process; the concentrations of both editpotassium cyanide and potassium carbonate are 3-20 g / L; the mixed solution of editpotassium cyanide and silver cyanide is adopted in the pre-silvering process; the concentration of editpotassium cyanide is 120-160 g / L; the concentration of silver cyanide is 2.2-4 g / L; the mixed solution of editpotassium cyanide, silver cyanide and potassium hydroxide is adopted in the silvering process; the concentration of silver cyanide is 12-15 g / L; the concentration of editpotassium cyanide is 100-150 g / L; and the concentration of potassium hydroxide is 0.2-0.5 g / L. The nickel silvering process disclosed by the invention is simple in process; silvering is carried out after treating through the process disclosed by the invention; and the LED bracket is non-discolouring in the roasting process only by plating silver of lower thickness.

Description

Technical field [0001] The invention relates to the field of electroplating, in particular to a nickel-on-silver process in the electroplating of an LED bracket. Background technique [0002] The service life of the LED chip is as high as 60,000 to 100,000 hours. Before welding the LED chip on the LED bracket, the LED bracket is often electroplated, and the surface of the LED bracket is plated with a layer of less active metal to prevent the LED bracket Aging or oxidation during use affects the service life of the LED chip. [0003] At present, in the electroplating process of LED stents, before silver plating, the LED stents are mostly treated with silver on copper. The process flow of silver on copper is as follows: alkaline copper plating→water washing→acid copper plating→pre-plating silver. The electroplated LED bracket requires the electroplated silver layer to reach a thickness of 80μ or more to ensure the effect of the silver layer on the surface of the LED bracket. Otherwi...

AI Technical Summary

Problems solved by technology

[0003] At present, in the electroplating process of LED brackets, before silver plating, most of the LED brackets are treated with silver on copper. The process of silver on copper is as follows: alkaline copper plating→water washing→acid copper plating→pre-silvering. For LED brackets with electroplating technology, the thickness of the electroplated silver layer needs to reach more than 80μ to ensure the silver layer on the surface of the LED bracket. Otherwise, the LED bracket will be seriously discolored during the baking process, which will affect the function and effect of the LED bracket.

In addition, this electroplating process is extremely difficult in process management and monitoring, and a slight negligence will produce batches of defective products, resulting in great waste

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