亜硫酸金塩を用いた自触媒型無電解金めっき浴 Autocatalytic Electroless Gold Plating Bath Using Gold Sulfite Salt

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著者

    • 鎗田 聡明 YARITA Somei
    • 日本エレクトロプレイティング・エンジニヤース(株) Electroplating Engineers of Japan Ltd. R&D Sec.

抄録

We studied cyanide-free autocatalytic electroless gold plating baths using sodium gold sulfite and found that gold was autocatalytically deposited when sodium thiocyanate or sodium iodide was added to the sodium gold sulfite solution.<br>We began by studying the effect of pH, additional sodium thiocyanate, gold concentration, and bath temperature on the deposition rate in the bath to which sodium thiocyanate was added. The pH and gold concentration had more pronounced effect than the other parameters studied. Lowering pH increased the deposition rate and increasing the gold concentration proportionally increased the deposition rate. This bath yielded a smooth lemon-yellow gold deposit of 1.28μm at a deposition rate of 0.43μm/h.<br>Gold was provided also autocatalytically deposited by adding sodium iodide. Using this bath, we studied the effect of gold concentration, pH, and the addition of sodium sulfite or sodium iodide on the deposition rate. The gold concentration and the pH had more pronounced effect than the other parameters studied, same as in the case of the bath containing sodium thiocyanate. But the deposit from sodium iodide bath was reddish and rough, then some additional agents were examined. Addition of nicotinic acid and polyethyleneimine gave smoother deposit. In sodium iodide bath, about 1μm/h of deposition rate was given, but according as increase of the plating thickness, growth of dendrite crystal was observed. As for this bath, continuous use more than 1M. T. O. was possible.

収録刊行物

  • 表面技術 = The Journal of the Surface Finishing Society of Japan

    表面技術 = The Journal of the Surface Finishing Society of Japan 49(3), 297-301, 1998-03-01

    The Surface Finishing Society of Japan

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各種コード

  • NII論文ID(NAID)
    10002108806
  • NII書誌ID(NCID)
    AN1005202X
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    09151869
  • NDL 記事登録ID
    4413783
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-291
  • データ提供元
    CJP書誌  NDL  J-STAGE 
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