Patents by Inventor Tomohiro MIMURA
Tomohiro MIMURA 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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Patent number: 11967564Abstract: A method for manufacturing a semiconductor device includes: forming an insulating film on a surface of a semiconductor layer of a semiconductor substrate; forming a contact hole in the insulating film; forming a conductor material on the insulating film to be in contact with the semiconductor layer through the contact hole; and patterning the conductor material using an alignment key included in the conductor material.Type: GrantFiled: January 27, 2021Date of Patent: April 23, 2024Assignee: DENSO CORPORATIONInventors: Aiko Kaji, Haruhito Ichikawa, Shuhei Mitani, Tomohiro Mimura, Yukihiro Wakasugi, Narumasa Soejima
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Publication number: 20230409990Abstract: A simulation device is a device that simulates movement of a vehicle between a plurality of ports in a shared traffic service and includes a calculation unit that calculates a work time in a relocation port that is a port to be a target of relocation of the vehicle and simulates the relocation based on the work time.Type: ApplicationFiled: December 8, 2021Publication date: December 21, 2023Applicant: NTT DOCOMO, INC.Inventors: Tomohiro MIMURA, Satoshi KAWASAKI, Shin ISHIGURO
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Publication number: 20230169414Abstract: A population extraction device includes: a time-series population acquisition unit acquiring demographic data in daily time slots over a time period in a target area and acquiring a time-series population in a time slot each day by extracting a population at the same time slots from the demographic data in daily time slots; a clustering unit clustering the time-series population in a time slot each day into a plurality of classes based on fluctuation-similarity; a determination unit determining a class on a no-event day based on fluctuation in each class; a stationary population derivation unit deriving a time-series average population of the class on a no-event day as a time-series stationary population of a target area; and a population extraction unit extracting a difference between the time-series population on a target day in a target area and the time-series stationary population as an event-related population of the target area.Type: ApplicationFiled: February 17, 2021Publication date: June 1, 2023Applicant: NTT DOCOMO, INC.Inventors: Shu ISHIKAWA, Yusuke FUKAZAWA, Satoshi KAWASAKI, Shin ISHIGURO, Tomohiro MIMURA
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Publication number: 20230074595Abstract: Provided is a manufacturing method of a semiconductor device having a semiconductor substrate. The manufacturing method includes forming an interlayer insulating film above the semiconductor substrate; forming a metal electrode above the interlayer insulating film; acquiring an image of the metal electrode and detecting defect candidates on a surface of the metal electrode based on the image; and performing inspection by determining a quality of the semiconductor device, based on height information of each of the detected defect candidates in a direction perpendicular to the surface of the metal electrode.Type: ApplicationFiled: August 16, 2022Publication date: March 9, 2023Inventors: Masayuki MIYAZAKI, Taketo TSUJI, Makoto TERAKAWA, Kensuke HATA, Tomohiro MIMURA
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Publication number: 20210151385Abstract: A method for manufacturing a semiconductor device includes: forming an insulating film on a surface of a semiconductor layer of a semiconductor substrate; forming a contact hole in the insulating film; forming a conductor material on the insulating film to be in contact with the semiconductor layer through the contact hole; and patterning the conductor material using an alignment key included in the conductor material.Type: ApplicationFiled: January 27, 2021Publication date: May 20, 2021Inventors: Aiko KAJI, Haruhito ICHIKAWA, Shuhei MITANI, Tomohiro MIMURA, Yukihiro WAKASUGI, Narumasa SOEJIMA
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Patent number: 10290707Abstract: A semiconductor device includes: a drain region; a drift layer made of a first conductivity type semiconductor with lower impurity concentration than the drain region; a base region made of a second conductivity type semiconductor; a source region made of the first conductivity type semiconductor with higher concentration; a contact region made of the second conductivity type semiconductor with higher concentration; a trench structure having a first gate insulation film and a first gate electrode arranged at an opening side of the trench and to be deeper than the base region, and a bottom part insulation film; a source electrode electrically connected to the source and contact regions; and a drain electrode at a rear side of the drain region. The drain is arranged to be deeper than the base region. The first gate insulation film is made of higher dielectric insulation material than the bottom part insulation film.Type: GrantFiled: March 10, 2016Date of Patent: May 14, 2019Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro Mimura, Takashi Kanemura, Masahiro Sugimoto, Narumasa Soejima
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Patent number: 10128344Abstract: A semiconductor device includes: a drain region made of a first or second conductivity type semiconductors; a drift layer made of the first conductivity type semiconductor; a base region made of the second conductivity type semiconductor; a source region made of the first conductivity type semiconductor with higher concentration; a contact region made of the second conductivity semiconductor with higher concentration; a trench gate structure having upper and lower gate structures; a source electrode connected to the source and contact regions; and a drain electrode at a rear side of the drain region. The upper gate structure is inside the trench at an upper side, and includes a first gate insulation film and a first gate electrode. The lower gate structure is inside the trench at a lower side, and includes a second gate insulation film made of higher dielectric insulation material and a second gate electrode.Type: GrantFiled: March 10, 2016Date of Patent: November 13, 2018Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro Mimura, Takashi Kanemura, Shoji Mizuno, Masahiro Sugimoto, Sachiko Aoi
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Publication number: 20180114845Abstract: A semiconductor device includes: a drain region made of a first or second conductivity type semiconductors; a drift layer made of the first conductivity type semiconductor; a base region made of the second conductivity type semiconductor; a source region made of the first conductivity type semiconductor with higher concentration; a contact region made of the second conductivity semiconductor with higher concentration; a trench gate structure having upper and lower gate structures; a source electrode connected to the source and contact regions; and a drain electrode at a rear side of the drain region. The upper gate structure is inside the trench at an upper side, and includes a first gate insulation film and a first gate electrode. The lower gate structure is inside the trench at a lower side, and includes a second gate insulation film made of higher dielectric insulation material and a second gate electrode.Type: ApplicationFiled: March 10, 2016Publication date: April 26, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro MIMURA, Takashi KANEMURA, Shoji MIZUNO, Masahiro SUGIMOTO, Sachiko AOI
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Publication number: 20180097061Abstract: A semiconductor device includes: a drain region; a drift layer made of a first conductivity type semiconductor with lower impurity concentration than the drain region; a base region made of a second conductivity type semiconductor; a source region made of the first conductivity type semiconductor with higher concentration; a contact region made of the second conductivity type semiconductor with higher concentration; a trench structure having a first gate insulation film and a first gate electrode arranged at an opening side of the trench and to be deeper than the base region, and a bottom part insulation film; a source electrode electrically connected to the source and contact regions; and a drain electrode at a rear side of the drain region. The drain is arranged to be deeper than the base region. The first gate insulation film is made of higher dielectric insulation material than the bottom part insulation film.Type: ApplicationFiled: March 10, 2016Publication date: April 5, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomohiro MIMURA, Takashi KANEMURA, Masahiro SUGIMOTO, Narumasa SOEJIMA
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Patent number: 9492783Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.Type: GrantFiled: March 28, 2011Date of Patent: November 15, 2016Assignees: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD., THE UNIVERSITY OF TOKYOInventors: Atsushi Tsutsumi, Akira Kishimoto, Yasuki Kansha, Kazuki Murahashi, Tomohiro Mimura, Mikihiro Hayashi, Yutaka Ekuni
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Patent number: 9281364Abstract: In a semiconductor substrate preparation step, a semiconductor substrate which is made of SiC and in which a first semiconductor region of a first conductivity type is formed is prepared. In a second semiconductor region forming step, a second semiconductor region is formed by implanting an impurity of a second conductivity type into a first semiconductor region through multiple ion implantation steps while varying implantation depths of the respective multiple ion implantation steps. In the second semiconductor region forming step, a dose amount of the impurity when an implantation energy of multiple ion implantation steps is the largest is smaller than a dose amount of impurity when the implantation energy is not the largest.Type: GrantFiled: May 27, 2014Date of Patent: March 8, 2016Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Hisashi Ishimabushi, Tomohiro Mimura, Narumasa Soejima
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Publication number: 20150197425Abstract: A carbon dioxide recovery method according to the present application includes a carbon dioxide absorption step of bringing an absorbing solution into contact with a gas to be treated including carbon dioxide to absorb the carbon dioxide in the gas to be treated, and a carbon dioxide separation step of heating the absorbing solution in which the carbon dioxide is absorbed to separate the carbon dioxide from the absorbing solution, wherein an aqueous amine solution having properties that a rate of change in an absorbed amount of carbon dioxide relative to a temperature change gradually decreases as the temperature increases in a heating temperature range in the carbon dioxide separation step is used as the absorbing solution, and the heating temperature of the absorbing solution in the carbon dioxide separation step is set to 87° C. to 100° C.Type: ApplicationFiled: July 26, 2013Publication date: July 16, 2015Applicant: NIPPON STEEL & SUMIKIN ENGINEERING CO., LTD.Inventors: Mikihiro Hayashi, Yutaka Ekuni, Tomohiro Mimura
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Publication number: 20140353683Abstract: In a semiconductor substrate preparation step, a semiconductor substrate which is made of SiC and in which a first semiconductor region of a first conductivity type is formed is prepared. In a second semiconductor region forming step, a second semiconductor region is formed by implanting an impurity of a second conductivity type into a first semiconductor region through multiple ion implantation steps while varying implantation depths of the respective multiple ion implantation steps. In the second semiconductor region forming step, a dose amount of the impurity when an implantation energy of multiple ion implantation steps is the largest is smaller than a dose amount of impurity when the implantation energy is not the largest.Type: ApplicationFiled: May 27, 2014Publication date: December 4, 2014Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Hisashi ISHIMABUSHI, Tomohiro MIMURA, Narumasa SOEJIMA
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Patent number: 8575689Abstract: An SiC semiconductor device includes a substrate, a drift layer, a base region, a source region, a trench, a gate oxide film, a gate electrode, a source electrode and a drain electrode. The substrate has a Si-face as a main surface. The source region has the Si-face. The trench is provided from a surface of the source region to a portion deeper than the base region and extends longitudinally in one direction and has a Si-face bottom. The trench has an inverse tapered shape, which has a smaller width at an entrance portion than at a bottom, at least at a portion that is in contact with the base region.Type: GrantFiled: December 20, 2011Date of Patent: November 5, 2013Assignees: DENSO CORPORATION, Toyota Jidosha Kabushiki KaishaInventors: Tomohiro Mimura, Shinichiro Miyahara, Hidefumi Takaya, Masahiro Sugimoto, Narumasa Soejima, Tsuyoshi Ishikawa, Yukihiko Watanabe
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Publication number: 20130055756Abstract: A carbon dioxide gas recovery device is provided which includes an absorption tower causing an absorbent to absorb carbon dioxide gas to generate a rich absorbent and a regeneration tower regenerating a lean absorbent by heating the rich absorbent to separate carbon dioxide gas therefrom. The regeneration tower includes a reboiler system heating the absorbent led out from the regeneration tower and reintroducing the heated absorbent into the regeneration tower and a mixed gas cooling system cooling a mixed gas led out from the regeneration tower, condensing a vapor fraction of a solute and a solvent, reintroducing the condensed vapor fraction into the regeneration tower, and discharging carbon dioxide gas. The carbon dioxide gas recovery device further includes a heat pump as a heat source of an endothermic reaction in which carbon dioxide gas is separated from the rich absorbent in the regeneration tower.Type: ApplicationFiled: March 28, 2011Publication date: March 7, 2013Inventors: Atsushi Tsutsumi, Akira Kishimoto, Yasuki Kansha, Kazuki Murahashi, Tomohiro Mimura, Mikihiro Hayashi, Yutaka Ekuni
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Publication number: 20120161154Abstract: An SiC semiconductor device includes a substrate, a drift layer, a base region, a source region, a trench, a gate oxide film, a gate electrode, a source electrode and a drain electrode. The substrate has a Si-face as a main surface. The source region has the Si-face. The trench is provided from a surface of the source region to a portion deeper than the base region and extends longitudinally in one direction and has a Si-face bottom. The trench has an inverse tapered shape, which has a smaller width at an entrance portion than at a bottom, at least at a portion that is in contact with the base region.Type: ApplicationFiled: December 20, 2011Publication date: June 28, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Tomohiro MIMURA, Shinichiro MIYAHARA, Hidefumi TAKAYA, Masahiro SUGIMOTO, Narumasa SOEJIMA, Tsuyoshi ISHIKAWA, Yukihiko WATANABE