Patents by Inventor Fujiko Yutani

Fujiko Yutani has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Process for the formation of a conductive circuit pattern
    Patent number: 5294291
    Abstract: A process is provided for the formation of a conductive circuit pattern on a base metal formed on a substrate. On the base metal, a plating resist is first provided in a pattern corresponding to the circuit to be formed and a circuit pattern is then formed by plating. The plating resist is treated with a stripper and then with a stripping residue remover to cut off chemical bonds in the resist by a dehydrating decomposition reaction. The base metal is treated with an etchant for the base metal, whereby any resist residue still remaining after the treatment with the stripping residue remover is removed and the base metal are etched at areas which were covered by the plating resist.
    Type: Grant
    Filed: September 21, 1992
    Date of Patent: March 15, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Haruo Akahoshi, Toshinari Takada, Fujiko Yutani, Takeyuki Itabashi, Shin Nishimura, Satoru Amo, Akio Takahashi, Rituji Toba, Masashi Miyazaki