Patents by Inventor Michihiro Kosaka

Michihiro Kosaka 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).

  • Metal/ceramic circuit board and method for producing same
    Patent number: 7128844
    Abstract: A metal layer 12 of aluminum or an aluminum alloy is formed on at least one side of a ceramic substrate 10, and a resist 14 having a predetermined shape is formed on the metal layer 12. Then, an etchant of a mixed solution prepared by mixing ferric chloride with water without adding any acids is used for etching and removing an undesired portion of the metal layer 12 to form a metal circuit 12 on the at least one side of the ceramic substrate 10.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: October 31, 2006
    Assignee: Dowa Mining Co., Ltd.
    Inventors: Nobuyoshi Tsukaguchi, Michihiro Kosaka
  • Metal/ceramic circuit board and method for producing same
    Publication number: 20040238483
    Abstract: A metal layer 12 of aluminum or an aluminum alloy is formed on at least one side of a ceramic substrate 10, and a resist 14 having a predetermined shape is formed on the metal layer 12. Then, an etchant of a mixed solution prepared by mixing ferric chloride with water without adding any acids is used for etching and removing an undesired portion of the metal layer 12 to form a metal circuit 12 on the at least one side of the ceramic substrate 10.
    Type: Application
    Filed: May 27, 2004
    Publication date: December 2, 2004
    Inventors: Nobuyoshi Tsukaguchi, Michihiro Kosaka