Title:
ELECTROLESS NICKEL PLATING SOLUTION CIRCULATING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2004/074544
Kind Code:
A1
Abstract:
An electroless nickel plating solution circulating system comprising (A) an electroless plating step in which plating is carried out by using a plating solution which contains nickel hypophosphite which is the main supplying chemical of plating metal ions N<sp>++</sp> and hypophosphite ions H<sb>2</sb>P0<sb>2 </sb>(B) a step in which HP0<sb>3</sb><sp>--</sp> ions are removed from the aged plating solution from the step (A); (C) a desalting step and (D) a recirculating step in which the plating solution is returned to the nonelectrolytic plating step (A) after its components are adjusted. Sulfates are not produced and accumulated in the plating solution and a long life of the plating solution can be achieved, which contributes to the global environmental protection.
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Inventors:
Horikawa, Ken c/o Nippon Chemical Industrial (Co. Ltd. Research & Development,
Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Mita, Muneo c/o Nippon Chemical Industrial (Co. Ltd. Research & Development, Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Nakao, Hidehiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Tashiro, Katsuhiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Mita, Muneo c/o Nippon Chemical Industrial (Co. Ltd. Research & Development, Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Nakao, Hidehiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Tashiro, Katsuhiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Application Number:
PCT/JP1997/004837
Publication Date:
September 02, 2004
Filing Date:
December 25, 1997
Export Citation:
Assignee:
Horikawa, Ken c/o Nippon Chemical Industrial (Co. Ltd. Research & Development,
Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Mita, Muneo c/o Nippon Chemical Industrial (Co. Ltd. Research & Development, Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Nakao, Hidehiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Tashiro, Katsuhiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Mita, Muneo c/o Nippon Chemical Industrial (Co. Ltd. Research & Development, Headquarter, 15-1, Kameido 9-chom, Koto-ku Tokyo 136, JP)
Nakao, Hidehiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
Tashiro, Katsuhiro c/o Meltex Inc. Research & Development (Dept. 3-1, Yoshinocho 2-chom, Omiya-shi Saitama 330, JP)
International Classes:
B01D61/02; B01D61/44; B01J39/04; B01J45/00; C23C18/16; (IPC1-7): C23C18/16
Attorney, Agent or Firm:
Soga, Michiteru (S. Soga & Co, 8th floor Kokusai Building, 1-1, Marunouchi 3-chom, Chiyoda-ku Tokyo 100, JP)
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