Patents by Inventor Tomoyuki Obata
Tomoyuki Obata 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).
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Publication number: 20240045412Abstract: An abnormality detection device includes: a process value acquirer that acquires, during operation of a plant including a plurality of devices, a process value of at least one monitoring target device among the plurality of devices; a command value acquirer that acquires a command value of a control operation amount for controlling the monitoring target device; and an abnormality detector that detects an abnormality of the monitoring target device on the basis of a relationship between a fluctuation range of a process value acquired by the process value acquirer and a fluctuation range of a command value acquired by the command value acquirer during a predetermined period.Type: ApplicationFiled: October 4, 2023Publication date: February 8, 2024Inventors: Yuriya MINETA, Tomoyuki OBATA
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Publication number: 20240021607Abstract: Provided is a semiconductor device having transistor and diode sections. The semiconductor device comprises: a gate metal layer provided above the upper surface of a semiconductor substrate; an emitter electrode provided above the upper surface of the semiconductor substrate; a first conductivity-type emitter region provided on the semiconductor substrate upper surface side in the transistor section; a gate trench section, which is provided on the semiconductor substrate upper surface side in the transistor section, is electrically connected to the gate metal layer, and is in contact with the emitter region; an emitter trench section, which is provided on the semiconductor substrate upper surface side in the diode section, and is electrically connected to the emitter electrode; and a dummy trench section, which is provided on the semiconductor substrate upper surface side, is electrically connected to the gate metal layer, and is not in contact with the emitter region.Type: ApplicationFiled: September 27, 2023Publication date: January 18, 2024Inventors: Tomoyuki OBATA, Soichi YOSHIDA, Tetsutaro IMAGAWA, Seiji MOMOTA
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Publication number: 20230361167Abstract: Provided is a semiconductor device comprising a semiconductor substrate containing oxygen. An oxygen concentration distribution in a depth direction of the semiconductor substrate has a high oxygen concentration part where an oxygen concentration is higher on a further upper surface-side than a center in the depth direction of the semiconductor substrate than in a lower surface of the semiconductor substrate. The high oxygen concentration part may have a concentration peak in the oxygen concentration distribution. A crystal defect density distribution in the depth direction of the semiconductor substrate has an upper surface-side density peak on the upper surface-side of the semiconductor substrate, and the upper surface-side density peak may be arranged within a depth range in which the oxygen concentration is equal to or greater than 50% of a peak value of the concentration peak.Type: ApplicationFiled: July 14, 2023Publication date: November 9, 2023Inventor: Tomoyuki OBATA
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Patent number: 11810914Abstract: Provided is a semiconductor device having transistor and diode sections. The semiconductor device comprises: a gate metal layer provided above the upper surface of a semiconductor substrate; an emitter electrode provided above the upper surface of the semiconductor substrate; a first conductivity-type emitter region provided on the semiconductor substrate upper surface side in the transistor section; a gate trench section, which is provided on the semiconductor substrate upper surface side in the transistor section, is electrically connected to the gate metal layer, and is in contact with the emitter region; an emitter trench section, which is provided on the semiconductor substrate upper surface side in the diode section, and is electrically connected to the emitter electrode; and a dummy trench section, which is provided on the semiconductor substrate upper surface side, is electrically connected to the gate metal layer, and is not in contact with the emitter region.Type: GrantFiled: January 17, 2022Date of Patent: November 7, 2023Assignee: FUJI ELECTRIC CO., LTD.Inventors: Tomoyuki Obata, Soichi Yoshida, Tetsutaro Imagawa, Seiji Momota
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Patent number: 11710766Abstract: Provided is a semiconductor device comprising a semiconductor substrate containing oxygen. An oxygen concentration distribution in a depth direction of the semiconductor substrate has a high oxygen concentration part where an oxygen concentration is higher on a further upper surface-side than a center in the depth direction of the semiconductor substrate than in a lower surface of the semiconductor substrate. The high oxygen concentration part may have a concentration peak in the oxygen concentration distribution. A crystal defect density distribution in the depth direction of the semiconductor substrate has an upper surface-side density peak on the upper surface-side of the semiconductor substrate, and the upper surface-side density peak may be arranged within a depth range in which the oxygen concentration is equal to or greater than 50% of a peak value of the concentration peak.Type: GrantFiled: March 23, 2021Date of Patent: July 25, 2023Assignee: FUJI ELECTRIC CO., LTD.Inventor: Tomoyuki Obata
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Publication number: 20230019632Abstract: Provided is a semiconductor device including: an active portion provided thereon; a plurality of trench portions each including a gate conductive portion and arranged in a array direction while extending in a extending direction in the active portion, a conductive portion shape ratio of a trench length to a width of the gate conductive portion array direction being 1,000 or more; a first control pad protruding toward an inner side of the semiconductor substrate from a first outer peripheral side of the semiconductor substrate in a top view; and a first well region provided below the first control pad and to cover the first control pad in the top view, in which a shortest distance between the first well region and a trench center position as a center of a length of the plurality of trench portions in the extending direction in the top view is 1,000 ?m or more.Type: ApplicationFiled: September 20, 2022Publication date: January 19, 2023Inventor: Tomoyuki OBATA
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Publication number: 20220139908Abstract: Provided is a semiconductor device having transistor and diode sections. The semiconductor device comprises: a gate metal layer provided above the upper surface of a semiconductor substrate; an emitter electrode provided above the upper surface of the semiconductor substrate; a first conductivity-type emitter region provided on the semiconductor substrate upper surface side in the transistor section; a gate trench section, which is provided on the semiconductor substrate upper surface side in the transistor section, is electrically connected to the gate metal layer, and is in contact with the emitter region; an emitter trench section, which is provided on the semiconductor substrate upper surface side in the diode section, and is electrically connected to the emitter electrode; and a dummy trench section, which is provided on the semiconductor substrate upper surface side, is electrically connected to the gate metal layer, and is not in contact with the emitter region.Type: ApplicationFiled: January 17, 2022Publication date: May 5, 2022Inventors: Tomoyuki OBATA, Soichi YOSHIDA, Tetsutaro IMAGAWA, Seiji MOMOTA
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Patent number: 11239234Abstract: Provided is a semiconductor device having transistor and diode sections. The semiconductor device comprises: a gate metal layer provided above the upper surface of a semiconductor substrate; an emitter electrode provided above the upper surface of the semiconductor substrate; a first conductivity-type emitter region provided on the semiconductor substrate upper surface side in the transistor section; a gate trench section, which is provided on the semiconductor substrate upper surface side in the transistor section, is electrically connected to the gate metal layer, and is in contact with the emitter region; an emitter trench section, which is provided on the semiconductor substrate upper surface side in the diode section, and is electrically connected to the emitter electrode; and a dummy trench section, which is provided on the semiconductor substrate upper surface side, is electrically connected to the gate metal layer, and is not in contact with the emitter region.Type: GrantFiled: November 24, 2019Date of Patent: February 1, 2022Assignee: FUJI ELECTRIC CO., LTD.Inventors: Tomoyuki Obata, Soichi Yoshida, Tetsutaro Imagawa, Seiji Momota
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Publication number: 20210210595Abstract: Provided is a semiconductor device comprising a semiconductor substrate containing oxygen. An oxygen concentration distribution in a depth direction of the semiconductor substrate has a high oxygen concentration part where an oxygen concentration is higher on a further upper surface-side than a center in the depth direction of the semiconductor substrate than in a lower surface of the semiconductor substrate. The high oxygen concentration part may have a concentration peak in the oxygen concentration distribution. A crystal defect density distribution in the depth direction of the semiconductor substrate has an upper surface-side density peak on the upper surface-side of the semiconductor substrate, and the upper surface-side density peak may be arranged within a depth range in which the oxygen concentration is equal to or greater than 50% of a peak value of the concentration peak.Type: ApplicationFiled: March 23, 2021Publication date: July 8, 2021Inventor: Tomoyuki OBATA
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Publication number: 20210151429Abstract: A semiconductor device is provided, including: a semiconductor substrate; an active portion provided on the semiconductor substrate; a first well region and a second well region provided on the semiconductor substrate and arranged sandwiching the active portion in a top view; a peripheral well region provided on the semiconductor substrate and arranged enclosing the active portion in a top view; an intermediate well region provided on the semiconductor substrate and arranged between the first well region and the second well region in a top view; a first pad arranged above the first well region and a second pad arranged above the second well region; and a temperature sense diode arranged above the intermediate well region.Type: ApplicationFiled: January 26, 2021Publication date: May 20, 2021Inventors: Tomoyuki OBATA, Soichi YOSHIDA
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Patent number: 10847641Abstract: Among trenches disposed in a striped-shape parallel to a front surface of a semiconductor substrate, a gate electrode at a gate potential is provided in a gate trench, via a gate insulating film; and in a dummy trench, a dummy gate electrode at an emitter electric potential is provided, via a dummy gate insulating film. Among mesa regions, in a first mesa region functioning as a MOS gate, a first p-type base region is provided in a surface region overall. In a second mesa region not functioning as a MOS gate, a second p-type base region is selectively provided at a predetermined interval, along a first direction. At least one of the trenches on each side of a mesa region is a gate trench and at at least one side wall of the gate trench, a MOS gate is driven. As a result, the ON voltage may be reduced.Type: GrantFiled: October 26, 2018Date of Patent: November 24, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Hitoshi Abe, Takeshi Fujii, Tomoyuki Obata
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Publication number: 20200105745Abstract: Provided is a semiconductor device having transistor and diode sections. The semiconductor device comprises: a gate metal layer provided above the upper surface of a semiconductor substrate; an emitter electrode provided above the upper surface of the semiconductor substrate; a first conductivity-type emitter region provided on the semiconductor substrate upper surface side in the transistor section; a gate trench section, which is provided on the semiconductor substrate upper surface side in the transistor section, is electrically connected to the gate metal layer, and is in contact with the emitter region; an emitter trench section, which is provided on the semiconductor substrate upper surface side in the diode section, and is electrically connected to the emitter electrode; and a dummy trench section, which is provided on the semiconductor substrate upper surface side, is electrically connected to the gate metal layer, and is not in contact with the emitter region.Type: ApplicationFiled: November 24, 2019Publication date: April 2, 2020Inventors: Tomoyuki OBATA, Soichi YOSHIDA, Tetsutaro IMAGAWA, Seiji MOMOTA
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Publication number: 20190067463Abstract: Among trenches disposed in a striped-shape parallel to a front surface of a semiconductor substrate, a gate electrode at a gate potential is provided in a gate trench, via a gate insulating film; and in a dummy trench, a dummy gate electrode at an emitter electric potential is provided, via a dummy gate insulating film. Among mesa regions, in a first mesa region functioning as a MOS gate, a first p-type base region is provided in a surface region overall. In a second mesa region not functioning as a MOS gate, a second p-type base region is selectively provided at a predetermined interval, along a first direction. At least one of the trenches on each side of a mesa region is a gate trench and at at least one side wall of the gate trench, a MOS gate is driven. As a result, the ON voltage may be reduced.Type: ApplicationFiled: October 26, 2018Publication date: February 28, 2019Inventors: Hitoshi ABE, Takeshi Fujii, Tomoyuki Obata
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Patent number: 9442096Abstract: An ultrasonic testing apparatus includes an ultrasonic probe disposed under an end portion of a pipe laid in the horizontal direction to face the pipe end portion. The probe transmits ultrasonic waves to the end portion of the pipe and receives the ultrasonic waves therefrom. A probe holder housing the probe includes a coupling medium reserver part which surrounds a space between the probe and the end portion of the pipe to contain a coupling medium W. The coupling medium reserver part includes a part body 21 into which the coupling medium is supplied; an annular bellows part, which is attached to the upper side of the part body to internally communicate with the part body, and an annular spacer 23 attached to the upper side of the bellows part, the upper surface of the annular spacer being a flat horizontal surface.Type: GrantFiled: October 18, 2012Date of Patent: September 13, 2016Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATIONInventors: Kenji Fujiwara, Hiroshi Kubota, Tomoyuki Obata, Masaki Yamano
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Patent number: 8667847Abstract: An ultrasonic testing apparatus for a pipe end portion, which enables accurate ultrasonic testing, comprises an ultrasonic probe disposed under the pipe end portion. The probe 1 transmits ultrasonic waves to the pipe end portion and receives the ultrasonic waves therefrom. A probe holder houses the probe which is disposed under the pipe end portion to face the pipe end portion and follows the pipe rotation. The probe holder comprises a coupling medium reserver part that surrounds a space between the probe and the pipe end portion to contain a coupling medium therein and comprises a coupling medium reserver part body into which the coupling medium is supplied. An annular bellows part, which communicates with the reserver part body, can expand and contract vertically and an annular spacer, which is attached to the upper side of the bellows part and an upper surface thereof has a flat horizontal surface.Type: GrantFiled: September 22, 2011Date of Patent: March 11, 2014Assignee: Nippon Steel & Sumitomo Metal CorporationInventors: Kenji Fujiwara, Hiroshi Kubota, Tomoyuki Obata, Masaki Yamano
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Publication number: 20130276540Abstract: An ultrasonic testing apparatus includes an ultrasonic probe disposed under an end portion of a pipe laid in the horizontal direction to face the pipe end portion. The probe transmits ultrasonic waves to the end portion of the pipe and receives the ultrasonic waves therefrom. A probe holder housing the probe includes a coupling medium reserver part which surrounds a space between the probe and the end portion of the pipe to contain a coupling medium W. The coupling medium reserver part includes a part body 21 into which the coupling medium is supplied; an annular bellows part, which is attached to the upper side of the part body to internally communicate with the part body, and an annular spacer 23 attached to the upper side of the bellows part, the upper surface of the annular spacer being a flat horizontal surface.Type: ApplicationFiled: October 18, 2012Publication date: October 24, 2013Inventors: Kenji FUJIWARA, Hiroshi Kubota, Tomoyuki Obata, Masaki Yamano
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Publication number: 20120067129Abstract: An ultrasonic testing apparatus for a pipe end portion, which enables accurate ultrasonic testing, comprises an ultrasonic probe disposed under the pipe end portion. The probe 1 transmits ultrasonic waves to the pipe end portion and receives the ultrasonic waves therefrom. A probe holder houses the probe which is disposed under the pipe end portion to face the pipe end portion and follows the pipe rotation. The probe holder comprises a coupling medium reserver part that surrounds a space between the probe and the pipe end portion to contain a coupling medium therein and comprises a coupling medium reserver part body into which the coupling medium is supplied. An annular bellows part, which communicates with the reserver part body, can expand and contract vertically and an annular spacer, which is attached to the upper side of the bellows part and an upper surface thereof has a flat horizontal surface.Type: ApplicationFiled: September 22, 2011Publication date: March 22, 2012Applicant: SUMITOMO METAL INDUSTRIES, LTD.Inventors: Kenji Fujiwara, Hiroshi Kubota, Tomoyuki Obata, Masaki Yamano