表面技術
Online ISSN : 1884-3409
Print ISSN : 0915-1869
ISSN-L : 0915-1869
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64 巻, 11 号
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小特集／プリンテッドエレクトロニクスの現状と将来
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技術論文
  • ゲル粒子化した塩化スズめっき液を用いた部分置換めっき法の検討
    四反田 功, 河野 健彦, 星 芳直, 板垣 昌幸
    2013 年 64 巻 11 号 p. 600-604
    発行日: 2013/11/01
    公開日: 2014/11/01
    DOIhttps://doi.org/10.4139/sfj.64.600
    ジャーナル フリー
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    We investigated plating conditions for a tin displacement plating using spherical gel electrolyte particles. Sodium alginate was used as the gelling agent. A 10×10－3 cm3 sodium alginate solution was dropped using a microsyringe into an aqueous solution containing tin chloride, tartaric acid, and thiourea. Optimal results were obtained with 3 wt% sodium alginate concentration and tin plating bath temperature for spherical gel preparation of less than 60 ℃. The alginate spherical gel particle containing the electrolytes adhered to the copper surface. While changing the plating time, tin film thicknesses were investigated using an X-ray fluorescence instrument. The tin film thickness showed a sigmoid growth curve until 120 min of plating time. The tin film thickness at 120 min was estimated as about 800 nm. The gel electrolyte particles on the tin film surface were rougher than those that adhered from an aqueous plating bath. Results suggest that differences in plating film roughness are attributable to the diffusion rate of tin ions to the electrode surface during displacement plating.
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