FIELD: manufacture of printed circuit boards. SUBSTANCE: as stabilizer for acidic peroxide etching solutions, known brightener for sulfuric acid copper plating of high-speed computers is utilized consisting of sulfur- containing sodium salts of benzenesulfonic acid and sodium sulfate. EFFECT: increased efficiency of stabilizer and speeded up etching process. 1 tbl
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Authors
Dates
1998-03-10—Published
1996-01-10—Filed