Patents by Inventor Yujin OKAMOTO

Yujin OKAMOTO 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: 9123696
    Abstract: In a semiconductor device including semiconductor modules, it is possible to average the temperatures of the semiconductor modules. At least two semiconductor modules, wherein a plurality of semiconductor circuits, on which are mounted one or more semiconductor chips having a gate terminal and gate resistors connected to the gate terminals, are disposed in parallel, are disposed above a cooling body so that an array direction of the semiconductor circuits is a direction intersecting a refrigerant flow. At least one temperature detecting resistor is disposed in each semiconductor module, a gate signal is supplied to a gate signal input terminal of one semiconductor module of the at least two semiconductor modules via the temperature detecting resistor of the other semiconductor module, and a gate signal is supplied to a gate signal input terminal of the other semiconductor module via the temperature detecting resistor of the one semiconductor module.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: September 1, 2015
    Assignee: FUJI ELECTRIC CO., LTD.
    Inventor: Yujin Okamoto
  • Patent number: 8975663
    Abstract: There is provided a semiconductor device such that it is possible to average the temperatures of a plurality of semiconductor chips simply by providing gate resistors. The semiconductor device includes a semiconductor module wherein a plurality of circuit substrates on which are mounted one or more semiconductor chips having a gate terminal and a gate resistor connected to the gate terminal are disposed in parallel, wherein the disposition distance of the gate resistor from the semiconductor chip is set based on the temperature of the semiconductor chip.
    Type: Grant
    Filed: August 12, 2013
    Date of Patent: March 10, 2015
    Assignee: Fuji Electric Co., Ltd.
    Inventor: Yujin Okamoto
  • Publication number: 20140070269
    Abstract: There is provided a semiconductor device such that it is possible to average the temperatures of a plurality of semiconductor chips simply by providing gate resistors. The semiconductor device includes a semiconductor module wherein a plurality of circuit substrates on which are mounted one or more semiconductor chips having a gate terminal and a gate resistor connected to the gate terminal are disposed in parallel, wherein the disposition distance of the gate resistor from the semiconductor chip is set based on the temperature of the semiconductor chip.
    Type: Application
    Filed: August 12, 2013
    Publication date: March 13, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Yujin OKAMOTO
  • Publication number: 20140070400
    Abstract: In a semiconductor device including semiconductor modules, it is possible to average the temperatures of the semiconductor modules. At least two semiconductor modules, wherein a plurality of semiconductor circuits, on which are mounted one or more semiconductor chips having a gate terminal and gate resistors connected to the gate terminals, are disposed in parallel, are disposed above a cooling body so that an array direction of the semiconductor circuits is a direction intersecting a refrigerant flow. At least one temperature detecting resistor is disposed in each semiconductor module, a gate signal is supplied to a gate signal input terminal of one semiconductor module of the at least two semiconductor modules via the temperature detecting resistor of the other semiconductor module, and a gate signal is supplied to a gate signal input terminal of the other semiconductor module via the temperature detecting resistor of the one semiconductor module.
    Type: Application
    Filed: August 12, 2013
    Publication date: March 13, 2014
    Applicant: FUJI ELECTRIC CO., LTD.
    Inventor: Yujin OKAMOTO