TUNGSTEN REPLENISHING LIQUID FOR NICKEL-TUNGSTEN ELECTROPLATING BATH

PROBLEM TO BE SOLVED: To provide a tungsten replenishing liquid for nickel-tungsten alloy electroplating bath capable of solving the conventional problem in a method of nickel-tungsten alloy electroplating using, especially, as anode, an insoluble anode singly, or using the insoluble anode and a nic...

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Bibliographische Detailangaben
Hauptverfasser: OBAYASHI SHINKICHI, SUMIYA HIROSHI, MORIMOTO TORU, OKADA JUN
Format: Patent
Sprache:eng
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Zusammenfassung:PROBLEM TO BE SOLVED: To provide a tungsten replenishing liquid for nickel-tungsten alloy electroplating bath capable of solving the conventional problem in a method of nickel-tungsten alloy electroplating using, especially, as anode, an insoluble anode singly, or using the insoluble anode and a nickel anode. SOLUTION: The tungsten replenishing liquid for nickel-tungsten electroplating bath is made of an aqueous solution containing tungsten trioxide, citric acid or ammonium salt thereof and ammonia. COPYRIGHT: (C)2011,JPO&INPIT