Patents by Inventor Rei YONEYAMA

Rei YONEYAMA 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: 11680979
    Abstract: An object is to provide a semiconductor device capable of accurately detecting a temperature of a transistor part and a temperature of the diode part, and improving an overheat protection function. A semiconductor device includes a semiconductor chip having a cell region made up of a plurality of cells including cells corresponding to a transistor part and a diode part, respectively, a temperature detection part detecting a temperature of the transistor part, and a temperature detection part detecting a temperature of the diode part, the temperature detection part is disposed in the cell corresponding to the transistor part, and the temperature detection part is disposed in the cell corresponding to the diode part.
    Type: Grant
    Filed: April 28, 2021
    Date of Patent: June 20, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Hiroki Hidaka, Keisuke Eguchi, Nobuchika Aoki, Rei Yoneyama
  • Publication number: 20230130373
    Abstract: A semiconductor device includes: an insulating layer; a circuit pattern on an upper surface of the insulating layer; a semiconductor element bonded to an upper surface of the circuit pattern through a first bonding material; an insulating component bonded to the upper surface of the circuit pattern through a second bonding material; and a lead electrode connecting the semiconductor element to the insulating component, wherein an upper surface of the semiconductor element is bonded to a lower surface of the lead electrode through a third bonding material, an upper surface of the insulating component is bonded to the lower surface of the lead electrode through a fourth bonding material, and the first bonding material, the second bonding material, the third bonding material, and the fourth bonding material are made of a same material.
    Type: Application
    Filed: October 3, 2022
    Publication date: April 27, 2023
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masayuki NISHIYAMA, Rei YONEYAMA, Naoki YOSHIMATSU, Shintaro ARAKI, Tatsuya KAWASE, Hiroyuki MASUMOTO
  • Patent number: 11581307
    Abstract: The object is to provide a semiconductor device that prevents a snapback operation and has excellent heat dissipation. The semiconductor device includes a semiconductor substrate, transistor portions, diode portions, a surface electrode, and external wiring. The transistor portions and the diode portions are provided in the semiconductor substrate and are arranged in one direction parallel with the surface of the semiconductor substrate. A bonding portion of the external wiring is connected to the surface electrode. The transistor portions and the diode portions are provided in a first region and a second region and alternately arranged in the one direction. A first transistor width and a first diode width in the first region are smaller than a width of the bonding portion. A second transistor width and a second diode width in the second region are larger than the width of the bonding portion.
    Type: Grant
    Filed: February 14, 2020
    Date of Patent: February 14, 2023
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Eguchi, Rei Yoneyama, Nobuchika Aoki, Hiroki Hidaka
  • Publication number: 20220065918
    Abstract: An object is to provide a semiconductor device capable of accurately detecting a temperature of a transistor part and a temperature of the diode part, and improving an overheat protection function. A semiconductor device includes a semiconductor chip having a cell region made up of a plurality of cells including cells corresponding to a transistor part and a diode part, respectively, a temperature detection part detecting a temperature of the transistor part, and a temperature detection part detecting a temperature of the diode part, the temperature detection part is disposed in the cell corresponding to the transistor part, and the temperature detection part is disposed in the cell corresponding to the diode part.
    Type: Application
    Filed: April 28, 2021
    Publication date: March 3, 2022
    Applicant: Mitsubishi Electric Corporation
    Inventors: Hiroki HIDAKA, Keisuke EGUCHI, Nobuchika AOKI, Rei YONEYAMA
  • Patent number: 11183834
    Abstract: A semiconductor module includes a diode bridge circuit, a sensor configured to measure a current value of the diode bridge circuit, a current limiting circuit having an IGBT connected to the diode bridge circuit, and a protection circuit configured to switch ON and OFF the IGBT in accordance with the current value of the diode bridge circuit measured by the sensor.
    Type: Grant
    Filed: June 21, 2019
    Date of Patent: November 23, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuchika Aoki, Rei Yoneyama, Keisuke Eguchi, Hiroki Hidaka
  • Patent number: 11114836
    Abstract: The present invention relates to a semiconductor device and it is an object of the present invention to provide a semiconductor device that makes it easy to change a specification on driving of a power semiconductor element or control of a protection operation thereof. The semiconductor device includes a power semiconductor element, a main electrode terminal of the power semiconductor element, a sensor section that emits a signal corresponding to a physical state of the power semiconductor element, a sensor signal terminal connected to the sensor section, a drive terminal that supplies power to drive the power semiconductor element and a case that accommodates the power semiconductor element, the main electrode terminal, the sensor section, the sensor signal terminal and the drive terminal, and the sensor signal terminal and the drive terminal are provided so as to be connectable from outside the case.
    Type: Grant
    Filed: April 8, 2016
    Date of Patent: September 7, 2021
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rei Yoneyama, Fumitaka Tametani, Manabu Matsumoto, Haruhiko Takemoto, Hiroshi Yoshida, Motonobu Joko
  • Patent number: 10861756
    Abstract: A semiconductor device comprises a power device, a sensor which measures a physical state of the power device to transmit a signal according to the physical state, and a main electrode terminal through which a main current of the power device flows. The semiconductor device further comprises a sensor signal terminal connected to the sensor for receiving a signal from the sensor, a driving terminal which receives driving power for driving the power device, and an open bottomed case which houses the power device, the sensor, the main electrode terminal, the sensor signal terminal and the driving terminal. The first and second terminals electrically conduct with each other to form a double structure. Also, the sensor signal terminal and the driving terminal each have a first terminal and a second terminal which are not embedded within the case.
    Type: Grant
    Filed: February 6, 2019
    Date of Patent: December 8, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Motonobu Joko, Rei Yoneyama
  • Publication number: 20200343240
    Abstract: The object is to provide a semiconductor device that prevents a snapback operation and has excellent heat dissipation. The semiconductor device includes a semiconductor substrate, transistor portions, diode portions, a surface electrode, and external wiring. The transistor portions and the diode portions are provided in the semiconductor substrate and are arranged in one direction parallel with the surface of the semiconductor substrate. A bonding portion of the external wiring is connected to the surface electrode. The transistor portions and the diode portions are provided in a first region and a second region and alternately arranged in the one direction. A first transistor width and a first diode width in the first region are smaller than a width of the bonding portion. A second transistor width and a second diode width in the second region are larger than the width of the bonding portion.
    Type: Application
    Filed: February 14, 2020
    Publication date: October 29, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keisuke EGUCHI, Rei YONEYAMA, Nobuchika AOKI, Hiroki HIDAKA
  • Patent number: 10771053
    Abstract: First and second switching regions include first and second gate electrodes respectively. Channel currents of the first and second switching regions are controlled according to electric charge amounts supplied by control signals input to the first and second gate electrodes respectively. The second switching region is connected in parallel with the first switching region. A control section outputs a first control signal for turning-on the first switching region to the first gate electrode and a second control signal for turning-on the second switching region to the second gate electrode. The control section stops outputting the second control signal after a first predetermined period elapses from a start of outputting the first and second control signals, and outputs the second control signal after a second predetermined period elapses from a stop of outputting the second control signal.
    Type: Grant
    Filed: May 17, 2019
    Date of Patent: September 8, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Keisuke Eguchi, Takahiro Inoue, Rei Yoneyama, Shiori Uota, Haruhiko Murakami
  • Patent number: 10727150
    Abstract: A semiconductor module includes an insulating substrate including an insulating layer, a first metal pattern formed on an upper surface of the insulating layer, and a second metal pattern formed on a lower surface of the insulating layer, a semiconductor chip that is formed of SiC and is fixed to the first metal pattern with a first metal joining member, and a heat sink that is fixed to the second metal pattern with a second metal joining member, wherein the semiconductor chip has a thickness that is equal to or larger than 0.25 mm and equal to or smaller than 0.35 mm, and the insulating layer has a thickness that is larger than the thickness of the semiconductor chip by a factor of 2.66 inclusive to 5 inclusive.
    Type: Grant
    Filed: March 9, 2017
    Date of Patent: July 28, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Haruhiko Murakami, Rei Yoneyama, Takami Otsuki, Akihiko Yamashita
  • Patent number: 10714447
    Abstract: An electrode terminal includes a body and a first bonding part. The body includes a first metal material. Then, the first bonding part is bonded to one end of the body, and includes a second metal material which is a clad material other than the first metal material. The first bonding part is ultrasonically bondable to a first bonded member. An elastic part which is elastically deformable is provided between the one end of the body and the other end of the body.
    Type: Grant
    Filed: October 6, 2016
    Date of Patent: July 14, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rei Yoneyama, Yoshitaka Kimura, Akihiko Yamashita
  • Publication number: 20200083882
    Abstract: First and second switching regions include first and second gate electrodes respectively. Channel currents of the first and second switching regions are controlled according to electric charge amounts supplied by control signals input to the first and second gate electrodes respectively. The second switching region is connected in parallel with the first switching region. A control section outputs a first control signal for turning-on the first switching region to the first gate electrode and a second control signal for turning-on the second switching region to the second gate electrode. The control section stops outputting the second control signal after a first predetermined period elapses from a start of outputting the first and second control signals, and outputs the second control signal after a second predetermined period elapses from a stop of outputting the second control signal.
    Type: Application
    Filed: May 17, 2019
    Publication date: March 12, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Keisuke EGUCHI, Takahiro INOUE, Rei YONEYAMA, Shiori UOTA, Haruhiko MURAKAMI
  • Publication number: 20200083700
    Abstract: A semiconductor module includes a diode bridge circuit, a sensor configured to measure a current value of the diode bridge circuit, a current limiting circuit having an IGBT connected to the diode bridge circuit, and a protection circuit configured to switch ON and OFF the IGBT in accordance with the current value of the diode bridge circuit measured by the sensor.
    Type: Application
    Filed: June 21, 2019
    Publication date: March 12, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Nobuchika AOKI, Rei YONEYAMA, Keisuke EGUCHI, Hiroki HIDAKA
  • Patent number: 10453780
    Abstract: An electronic circuit according to this invention includes a printed circuit board and an electronic component that is soldered onto the printed circuit board. The electronic component is a flat package including a die pad exposed to outside and external electrode terminals. A gap is provided between the printed circuit board and the electronic component. The printed circuit board is provided with a hole between the die pad and the external electrode terminals in planar view. The gap is filled with insulating resin at least partially between the die pad and the external electrode terminals. The insulating resin is injected through the hole.
    Type: Grant
    Filed: October 30, 2015
    Date of Patent: October 22, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rei Yoneyama, Nobuya Nishida, Hiroyuki Okabe
  • Patent number: 10366964
    Abstract: A semiconductor device including a first semiconductor switching element having a first gate pad, a plurality of first emitter pads, and a first collector pad, a first wire for connecting adjacent pads out of the plurality of first emitter pads, a first output wire for connecting one of the plurality of first emitter pads to an output, a first controller for applying a gate voltage to the first gate pad, a first emitter wire that is directly connected to a first extraction pad which is any one pad of the plurality of first emitter pads, and is connected to the first controller to give a ground potential of the first controller, and a second semiconductor switching element having a second gate pad, a second emitter pad and a second collector pad connected to the output.
    Type: Grant
    Filed: April 23, 2018
    Date of Patent: July 30, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Taichi Obara, Rei Yoneyama, Masayuki Ando
  • Patent number: 10338128
    Abstract: A life estimation circuit includes a temperature detector configured to detect temperature of a power element unit, an inflection point detection unit configured to detect an inflection point of temperature variation in the power element unit based on an output signal from the temperature detector, an operation unit configured to determine an absolute value of a difference between the temperature of the power element unit at an inflection point detected this time and the temperature of the power element unit at an inflection point detected last time, a count circuit configured to count the number of times that the absolute value of the difference in temperature has reached a threshold temperature, and a signal generation unit configured to output, when a count value from the count circuit reaches a threshold number of times, an alarm signal indicating that the power element is about to reach the end of its life.
    Type: Grant
    Filed: June 13, 2016
    Date of Patent: July 2, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Shiori Uota, Fumitaka Tametani, Takahiro Inoue, Rei Yoneyama
  • Patent number: 10325825
    Abstract: A semiconductor apparatus includes: a case made of resin; an insert terminal including an external terminal portion embedded in the case and having a first terminal exposed from the case, and an internal terminal portion bent in a L shape with respect to a second terminal of the external terminal portion and having a first surface exposed from the case and an anchor part in close contact with the case; and a bonding wire bonded to the first surface of the internal terminal portion.
    Type: Grant
    Filed: March 15, 2018
    Date of Patent: June 18, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Nobuchika Aoki, Rei Yoneyama, Akira Goto, Akihiko Yamashita
  • Publication number: 20190172763
    Abstract: A semiconductor device comprises a power device, a sensor which measures a physical state of the power device to transmit a signal according to the physical state, and a main electrode terminal through which a main current of the power device flows. The semiconductor device further comprises a sensor signal terminal connected to the sensor for receiving a signal from the sensor, a driving terminal which receives driving power for driving the power device, and an open bottomed case which houses the power device, the sensor, the main electrode terminal, the sensor signal terminal and the driving terminal. The first and second terminals electrically conduct with each other to form a double structure. Also, the sensor signal terminal and the driving terminal each have a first terminal and a second terminal which are not embedded within the case.
    Type: Application
    Filed: February 6, 2019
    Publication date: June 6, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Motonobu JOKO, Rei YONEYAMA
  • Patent number: D864884
    Type: Grant
    Filed: April 5, 2018
    Date of Patent: October 29, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rei Yoneyama, Nobuchika Aoki, Hideki Tsukamoto, Akihiko Yamashita, Masayuki Ando
  • Patent number: D873227
    Type: Grant
    Filed: June 12, 2019
    Date of Patent: January 21, 2020
    Assignee: Mitsubishi Electric Corporation
    Inventors: Rei Yoneyama, Nobuchika Aoki, Hideki Tsukamoto, Akihiko Yamashita, Masayuki Ando