Electroplating copper chloride causes of excessive consumption

Sept. 30, 2010 - PRLog -- RayMing PCB - http://www.raypcb.com

Electroplating copper chloride causes of excessive consumption
This article discusses the printed circuit board copper sulfate in an "excessive consumption of chloride ions" phenomenon, analyzing the problem.

With the current high-density printed wiring boards, high-precision direction, copper sulfate process made more stringent requirements, must also control the copper plating process in a variety of factors, in order to obtain high quality coatings. The following process for the copper chloride appears the phenomenon of excessive consumption, excessive consumption of chloride ions causes.

Chloride ion occurs, excessive consumption of the antecedent

Copper plate board when the plane line of low current area a "dull" phenomenon, the low concentration of chlorine prescription; general by adding hydrochloric acid, the plate surface coating of low current density area "dull" phenomenon to disappear, the bath the chloride ion concentration to reach the normal range, the board coating light. If you want a lot of hydrochloric acid solution by adding the low current density plating "dull" phenomenon, it is not necessarily a result of chloride ion concentration is too low, the need to analyze the real reason. If you take a lot of hydrochloric acid added: As a result, could have other consequences, the second to increase the production costs, not conducive to business competition.

Correct analysis of the "low current density plating dull" because

By adding hydrochloric acid to eliminate a large number of "low current density plating is not bright" phenomenon, that the case of chloride ion is too small, only need to add hydrochloric acid to increase the concentration of chloride ions reach the normal range, so that the light coating of low current density area. If you want to add double the hydrochloric acid concentration of chloride ions to make the normal range? What is the large amount of chloride ions in the consumption of it? Chloride ion concentration is too high brightener consumption will fast. That chloride ions will react with the brightener, excessive consumption of chlorine ions; in turn, also consuming excessive brightener chloride. Because chloride ions are too small and caused excessive brightener low current density area coating is not bright, "the main reason, it can be seen, resulting in" copper chloride ion is mainly due to excessive consumption of brightener concentration is too high.
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RayMing PCB - www.raypcb.com . RayMing Technology (HK) Co., Ltd is a professional High-tech PCB Manufacturer of single-sided, double-sided and multilayer printed circuit boards(up to 20L), and some high end boards,