Selective copper electroplating process

Abstract

The invention provides a selective copper electroplating process. The selective copper electroplating process comprises the following steps: S1: embedding a rubber jig in a selective copper plating area: firstly, fixing a product on a clamp, then buckling rubber into the selective electroplating area, and enabling the periphery of rubber to be completely in close fit with the product without clearances or not-in-place assembly; S2: immersing the product clamped into the rubber jig in 100 g / L chromic acid for 1-3 min to remove a copper layer in the non-selective electroplating area; S3: cleaning with clear water for 1-2 min; S4: removing the rubber jig into which the product is clamped: placing the product in a jig clamping groove to separate the product from the rubber jig. According to the selective copper electroplating process, the rubber jig and a part are in close combination, so that the electroplating area can be well shielded and protected, other cleaning agents cannot be in direct contact with the plating layer, and accordingly, cleaning is more convenient; the process is more stable; influences on the plating layer, caused by cleaning and shielding a wax layer, are reduced; and the jig is adopted instead to perform direct shielding, so that the cleaning is convenient, and the operation is simpler.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to a selective copper plating electroplating process. Background technique [0002] The current selective partial copper plating process uses copper plating first and then waxes the selective area for protection and shielding, the unshielded part of the coating is removed, and then the wax layer is partially cleaned with a wax removal reagent to obtain the required selective copper plating. product. [0003] Due to the use of a wax-coated shielding layer in the current process, the phenomenon of incomplete cleaning of product corners and residual wax layer often occurs when cleaning and removing the wax-coated layer. In addition, waxing is time-consuming and labor-intensive, and uneven waxing will occur at the same time. If the number of repeated cleanings exceeds 3 times, the coating will change color. Contents of the invention [0004] In order to solve the above techni...

AI Technical Summary

Problems solved by technology

[0003] In the current process, due to the use of a wax-coated shielding layer, the phenomenon of incomplete cleaning of product corners and residual wax layer often occurs when cleaning and removing the wax-coated layer

In addition, waxing is time-consuming and labor-intensive, and uneven waxing will occur at the same time. If the number of cleanings is repeated for more than 3 times, the coating will change color

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