Patents by Inventor Shiro Iijima

Shiro Iijima 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).

  • Metallizing paste for silicon carbide sintered body and a semiconductor device including the same
    Patent number: 4769690
    Abstract: The metal powder composition for the metallizing paste is composed of not less than 90 wt % gold, 0.03-3.0 wt % cadmium, 0.1-2.0 wt % bismuth, 0.01-1.0 wt % copper, 0.01-2.0 wt % germanium and 0.01-1.0 wt % silicon.The metallized paste bonds both the silicon carbide sintered substrate and the silicon semiconductor element with a high bonding strength.
    Type: Grant
    Filed: April 24, 1986
    Date of Patent: September 6, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Hideo Suzuki, Sigeru Takahashi, Shiro Iijima
  • Film magnetic head slider having a contacting portion containing zirconia and carbon
    Patent number: 4734802
    Abstract: A film magnetic slider which comprises a slider performing contact-start-stop actions on a recording medium and being provided with a film magnetic head device on the side end of the slider, at least the recording-medium-contacting part of the slider being made from a sintered material having a thermal conductivity of not more than 0.02 cal/cm.sec..degree.C. and an average crystal grain size of not more than 5 .mu.m has a good slidability on the recording medium and a good machinability and can improve the life of the recording medium.
    Type: Grant
    Filed: October 1, 1985
    Date of Patent: March 29, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Shinsuke Higuchi, Yukio Takeda, Shiro Iijima, Masaki Ohura, Sadanori Nagaike
  • Thin film magnetic head slider
    Patent number: 4639803
    Abstract: A thin film magnetic head slider is formed of a sintered material made of a mixture of AlN and TiN. The ratio of volume % AlN to TiN in the mixture is in the range of 50:50 to 99:1. The thin film magnetic head slider has improved lubricant property as shown by its high contact-start-stop (C.S.S.) life.
    Type: Grant
    Filed: July 22, 1985
    Date of Patent: January 27, 1987
    Assignee: Hitachi, Ltd.
    Inventors: Yukio Takeda, Shiro Iijima, Shinsuke Higuchi, Masaki Ohura, Sadanori Nagaike