Patents by Inventor Hiromoto Tamura

Hiromoto Tamura 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).

  • Planar mount LED element and method for manufacturing the same
    Patent number: 6228669
    Abstract: A planar mount LED element having at least a pair of P electrode and N electrode formed on one and the same surface of an LED substrate, and a method for manufacturing the same. A P type metal film(s) is formed at a predetermined portion on one surface of an N type LED substrate at a portion where a PN junction is to be formed on the surface of the N type LED substrate. An N type metal film is formed at a predetermined portion on the same surface of the N type LED substrate at a portion where an N electrode is to be formed on the surface of the N type LED substrate. Then the two films are covered with an insulation film to form a capped construction. Thereafter the portion where the PN junction is to be provided is subjected to heat treatment at the diffusing temperature, thereby forming the PN junction. The portion where the N electrode is to be provided is irradiated with a laser beam, thereby forming a heavily-doped P type alloy portion that reaches the N type LED substrate.
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: May 8, 2001
    Assignee: Stanley Electric Co., Ltd.
    Inventors: Hideo Kondo, Hiromoto Tamura