Patents by Inventor Hiroyuki Yoda

Hiroyuki Yoda 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).

  • Patent number: 5923084
    Abstract: A semiconductor device comprising a low-heat-resistance heat discharging route suitable for small semiconductor devices, such as an IC card, is disclosed. Heat arising from electronic parts is efficiently dispersed to the outside, thereby accomplishing a decrease in size and a heightening of function. In a specific embodiment, a CPU is mounted on a substrate in a position of thermal via holes. A high-heat-conducting material such as semifluid silicone rubber is placed between a CPU mounting face of the substrate and lower panel located on the opposite side of the substrate. The high-heat-conducting material is a filler having the ability to change shape and the property of electrical nonconductivity. A greater part of the heat arising from the CPU is transmitted through the thermal via holes from the CPU mounting face of the substrate to the opposite side, and further to the high-heat-conducting material which conveys the heat to the lower panel.
    Type: Grant
    Filed: June 5, 1996
    Date of Patent: July 13, 1999
    Assignee: Seiko Epson Corporation
    Inventors: Kazuaki Inoue, Hiroyuki Yamashita, Norio Nakamura, Hiroyuki Yoda
  • Patent number: D389812
    Type: Grant
    Filed: September 23, 1996
    Date of Patent: January 27, 1998
    Assignee: Seiko Epson Corporation
    Inventor: Hiroyuki Yoda