Patents by Inventor Masato Aoki

Masato Aoki 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).

  • Crystal growth method, crystal growth apparatus, group-III nitride crystal and group-III nitride semiconductor device
    Patent number: 6780239
    Abstract: A crystal growth method, comprising the steps of: a) bringing a nitrogen material into a reaction vessel in which a mixed molten liquid comprising an alkaline metal and a group-III metal; and b) growing a crystal of a group-III nitride using the mixed molten liquid and the nitrogen material brought in by the step a) in the reaction vessel, wherein a provision is made such as to prevent a vapor of the alkaline metal from dispersing out of the reaction vessel.
    Type: Grant
    Filed: October 16, 2001
    Date of Patent: August 24, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Seiji Sarayama, Masahiko Shimada, Hisanori Yamane, Masato Aoki
  • Crystal growth method, crystal growth apparatus, group-III nitride crystal and group-III nitride semiconductor device
    Publication number: 20030164138
    Abstract: A group-III nitride crystal growth method, comprising the steps of: a) preparing a mixed molten liquid of an alkaline metal and a material at least comprising a group-III metal; b) growing a group-III nitride crystal of the group-III metal and nitrogen from the mixed molten liquid and a material at least comprising nitrogen; and c) setting a predetermined crystal growth condition according to a zone defined by a pressure and a temperature in said step b).
    Type: Application
    Filed: December 3, 2002
    Publication date: September 4, 2003
    Inventors: Seiji Sarayama, Hirokazu Iwata, Masahiko Shimada, Hisanori Yamane, Masato Aoki
  • Crystal growth method, crystal growth apparatus, group-III nitride crystal and group-III nitride semiconductor device
    Publication number: 20020046695
    Abstract: A crystal growth method, comprising the steps of: a) bringing a nitrogen material into a reaction vessel in which a mixed molten liquid comprising an alkaline metal and a group-III metal; and b) growing a crystal of a group-III nitride using the mixed molten liquid and the nitrogen material brought in by the step a) in the reaction vessel, wherein a provision is made such as to prevent a vapor of the alkaline metal from dispersing out of the reaction vessel.
    Type: Application
    Filed: October 16, 2001
    Publication date: April 25, 2002
    Inventors: Seiji Sarayama, Masahiko Shimada, Hisanori Yamane, Masato Aoki
  • Mold vibrating apparatus in continuous casting equipment
    Patent number: 5458182
    Abstract: A vibrating apparatus for vibrating a mold 1 by an electrohydraulic stepping cylinder 5 through a link mechanism 3 is characterized in that when a driving signal delivered into a drive unit 26 for the stepping cylinder 5, the actual acceleration of the mold 1 is fed back to a target waveform signal for the mold 1 and compensating signals for cancelling the operation delay of the stepping cylinder 5 and the signal transfer lag due to elastic deformation of the link mechanism and the like are added thereto to make feed-forward compensation.
    Type: Grant
    Filed: October 14, 1994
    Date of Patent: October 17, 1995
    Assignee: Hitachi Zosen Corporation
    Inventors: Masato Aoki, Shigeharu Okumura, Motomitsu Suzuki, Kyoji Chikira, Toshiyuki Okada, Katsuya Sasaki, Yoichiro Nakamura, Hideki Saito