Patents by Inventor Yoshihiro Minamikawa

Yoshihiro Minamikawa 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).

  • Nickel-gold plating exhibiting high resistance to corrosion
    Patent number: 6872470
    Abstract: A nickel-gold plating exhibiting high resistance to corrosion, which has a nickel plating layer formed on a base metal (1) and a gold plating layer (3) formed thereon, characterized in that the nickel plating layer (2) has a corrosion potential being brought close to that of the gold plating layer (3) through the reduction of the sulfur content of the nickel plating layer; or which has a first nickel plating layer (6) formed on a base metal, a second nickel plating layer (7) formed on the first nickel plating layer and a gold plating layer formed thereon, characterized in that the first nickel plating layer has a corrosion potential nobler (higher) than that of the second nickel plating layer.
    Type: Grant
    Filed: February 19, 2001
    Date of Patent: March 29, 2005
    Assignee: Ibiden Co., Ltd.
    Inventor: Yoshihiro Minamikawa
  • Nickel-gold plating exhibiting high resistance to corrosion
    Publication number: 20030022017
    Abstract: A nickel-gold plating exhibiting high resistance to corrosion, which has a nickel plating layer formed on a base metal (1) and a gold plating layer (3) formed thereon, characterized in that the nickel plating layer (2) has a corrosion potential being brought close to that of the gold plating layer (3) through the reduction of the sulfur content of the nickel plating layer; or which has a first nickel plating layer (6) formed on a base metal, a second nickel plating layer (7) formed on the first nickel plating layer and a gold plating layer formed thereon, characterized in that the first nickel plating layer has a corrosion potential nobler (higher)than that of the second nickel plating layer.
    Type: Application
    Filed: August 26, 2002
    Publication date: January 30, 2003
    Inventor: Yoshihiro Minamikawa