Printed circuit board alkaline copper chloride etching liquid with high quality, high efficiency and safety

Printed circuit board alkaline copper chloride etching liquid with high quality, high efficiency and safety

  • CN 104,862,703 A
  • Filed: 04/13/2015
  • Published: 08/26/2015
  • Est. Priority Date: 06/16/2014
  • Status: Active Application
First Claim
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1. a high-quality and high-efficiency and the printed-wiring board (PWB) alkaline copper chloride etching solution of safety, comprise cupric chloride, etch sub-liquid, the automatic controlling machine that feeds intake that detects is used to control the etching solution proportion in etching process, with the numerical value making the copper ion concentration in described etching solution be not less than setting;

  • It is characterized in that;

    Add carboxylic acid and/or carboxylic acid ammonium in the sub-liquid of described etching, the proportioning of its compositions in weight percentage is as follows;

    Ammonium chloride 10%-30%;

    Carboxylic acid and/or carboxylic acid ammonium 0.0002%-25%;

    Ammoniacal liquor 0.3-25%;

    All the other are water,The initial injected volume B of described cupric chloride obtains according to following formulae discovery;

    A=(134.5/63.5) ×

    copper ion concentration set(ting)value A;

    The etching solution controlling of production process parameter setting of gained;

    copper ion concentration is 30-170g/L, pH is 7.0-8.8.

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