Patents by Inventor Yusuke Kobayashi
Yusuke Kobayashi 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: 10770581Abstract: A first side wall and a second side wall of a trench are each an a-plane having high carrier mobility. Along the first side wall of the trench, a gate insulating film is provided. A gate electrode is provided in the trench, and across the gate insulating film, opposes a portion of a p-type base region between an n+-type source region and an n-type current spreading region. Along the second side wall of the trench, a conductive layer is provided. The conductive layer, at the second side wall of the trench, forms Schottky contacts with a p++-type contact region, the p-type base region, and the n-type current spreading region. The trench has a bottom corner portion that is at the second side wall and encompassed by a p+-type region that is provided in the n-type current spreading region so as to be separated from the p-type base region.Type: GrantFiled: July 22, 2019Date of Patent: September 8, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Manabu Takei, Shinsuke Harada, Naoki Kumagai
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Patent number: 10770582Abstract: A vertical MOSFET having a trench gate structure includes an n?-type drift layer and a p-type base layer formed by epitaxial growth. In the n?-type drift layer, an n-type region, a first p+-type region, and a second p+-type region are provided. A metal film of a trench SBD is connected to a source electrode; and a p+-type region is provided between the source electrode and the p-type base layer.Type: GrantFiled: July 22, 2019Date of Patent: September 8, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Manabu Takei, Naoki Kumagai
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Patent number: 10763353Abstract: A first p+-type region in contact with a bottom of a gate trench is disposed in a striped shape extending along a first direction that is orthogonal to a second direction along which the gate trench extends in a striped shape, as viewed from a front surface of a silicon carbide substrate. As a result, trench gate MOSFETs are disposed in parallel at a predetermined cell pitch along the first direction. A flat SBD is disposed at a predetermined cell pitch along the second direction. The cell pitch of the trench gate MOSFET and the cell pitch of the flat SBD may be set independently of each other.Type: GrantFiled: February 25, 2019Date of Patent: September 1, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Naoyuki Ohse
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Patent number: 10761667Abstract: A capacitive three-dimensional sensor includes: a light-guide unit having a side surface and an operation surface, the side surface being formed along the Z direction and including a light entering portion, through which light from a light source enters, the operation surface being configured to input the inputs and including a light output portion, from which the light exits; a sheet-like X-Y electrode body configured to sense the inputs in the plane X and Y directions; a deformable body including a sheet-like elastic body; and a sheet-like Z electrode body configured to sense the input in the Z direction. The light-guide unit includes an optional decorative sheet, and a light-guide sheet to guide the light that has entered the light-guide unit from the side surface and output the light toward the light output portion. A total of bending stiffnesses of the light-guide sheet and decorative sheet is less than 256.Type: GrantFiled: June 27, 2017Date of Patent: September 1, 2020Assignee: SHIN-ETSU POLYMER CO., LTD.Inventors: Yusuke Kobayashi, Yuta Ishii
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Publication number: 20200243606Abstract: According to the embodiment, a semiconductor memory device includes a first conductive layer, a second conductive layer, a first memory cell, a second memory cell, a third conductive layer, a first contact, a intermediate memory cell, a fourth conductive layer, a third memory cell, a fifth conductive layer, and a second contact. The third conductive layer is separated from the first conductive layer and the second conductive layer in a third direction crossing a first direction and crossing a second direction and extends in the second direction. The fifth conductive layer is separated from the second conductive layer in the third direction and extends in the second direction. A first length of the second conductive layer along the second direction is shorter than a second length of the fifth conductive layer along the second direction.Type: ApplicationFiled: April 10, 2020Publication date: July 30, 2020Applicant: Toshiba Memory CorporationInventors: Yusuke KOBAYASHI, Yoshihisa IWATA, Takeshi SUGIMOTO
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Patent number: 10720330Abstract: A semiconductor device includes: a first-conductivity-type drift layer including a first-conductivity-type impurity, vacancy-oxygen-hydrogen complex defects each caused by a vacancy, an oxygen atom, and a hydrogen atom, divacancy-and-vacancy-phosphorus complex defects, having a trap density level lower than a trap density level of the vacancy-oxygen-hydrogen complex defect, and third complex defects; a plurality of donor layers provided at different depths in a depth direction of the first-conductivity-type drift layer, wherein each of the plurality of donor layers includes donors caused by the vacancy-oxygen-hydrogen complex defects, and each of the plurality of donor layers has an impurity concentration distribution that includes a first portion with a maximum impurity concentration and a second portion with a concentration gradient in which the impurity concentration is reduced from the first portion to both main surfaces of the first-conductivity-type drift layer; and a second-conductivity-type semiconducType: GrantFiled: July 31, 2018Date of Patent: July 21, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Tomonori Mizushima, Yusuke Kobayashi
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Patent number: 10693002Abstract: In an n-type current diffusion region, a first p+-type region underlying a bottom of a trench (gate trench) is provided. In the n-type current diffusion region, a second p+-type region is provided between adjacent trenches, separated from the first p+-type region and in contact with the p-type base region. In the p-type base region, near a side wall of the trench, a third p+-type region is provided a predetermined distance from the side wall of the trench and is separated from the first and the second p+-type regions. The third p+-type region extends in a depth direction, substantially parallel to the side wall of the trench. A drain-side end of the third p+-type region is in contact with the n-type current diffusion region or protrudes a predetermined depth from the interface of the p-type base region and the n-type current diffusion region toward the drain.Type: GrantFiled: September 4, 2018Date of Patent: June 23, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Naoyuki Ohse, Shinsuke Harada, Manabu Takei
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Publication number: 20200190251Abstract: A curable composition of the present invention includes a cationic polymerizable compound; a thermal polymerization initiator; and a storage stabilizer, in which the cationic polymerizable compound includes at least two selected from the group consisting of a glycidyl ether compound, an alicyclic epoxy compound, and an oxetane compound, a content of the thermal polymerization initiator is from 0.3 to 3 parts by mass with respect to 100 parts by mass of the cationic polymerizable compound, and chain curing is enabled by thermal energy generated by a polymerization reaction of the cationic polymerizable compound.Type: ApplicationFiled: August 29, 2017Publication date: June 18, 2020Inventors: Noriya HAYASHI, Toshikatsu SAKAKIBARA, Yusuke KOBAYASHI, Tatsuya KIMURA
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Patent number: 10677963Abstract: A curved substrate with a film includes a substrate having a first main surface, a second main surface and an end surface, and an antiglare film provided on the first main surface. The substrate has a flat portion and a bent portion. A value obtained by dividing a reflected-image diffusibility index value R of the bent portion by the sum of the reflected-image diffusibility index value R of the bent portion and a reflected-image diffusibility index value R of the flat portion is 0.3 or higher and 0.8 or less.Type: GrantFiled: October 30, 2017Date of Patent: June 9, 2020Assignee: AGC Inc.Inventors: Azusa Takai, Yusuke Kobayashi, Kazunobu Maeshige, Takaaki Murakami
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Patent number: 10672834Abstract: According to the embodiment, a semiconductor memory device includes a first conductive layer, a second conductive layer, a first memory cell, a second memory cell, a third conductive layer, a first contact, a intermediate memory cell, a fourth conductive layer, a third memory cell, a fifth conductive layer, and a second contact. The third conductive layer is separated from the first conductive layer and the second conductive layer in a third direction crossing a first direction and crossing a second direction and extends in the second direction. The fifth conductive layer is separated from the second conductive layer in the third direction and extends in the second direction. A first length of the second conductive layer along the second direction is shorter than a second length of the fifth conductive layer along the second direction.Type: GrantFiled: February 22, 2019Date of Patent: June 2, 2020Assignee: Toshiba Memory CorporationInventors: Yusuke Kobayashi, Yoshihisa Iwata, Takeshi Sugimoto
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Publication number: 20200165451Abstract: A composition containing 40 to 350 parts by weight of a functional fiber and 100 to 600 parts by weight of an inorganic microparticulate filler having an average particle diameter of less than 15 ?m per 100 parts by weight of the addition-reaction type polyimide resin. Also disclosed is a sliding member including the composition and a method for producing a molded article including the composition.Type: ApplicationFiled: April 11, 2018Publication date: May 28, 2020Applicant: TOYO SEIKAN GROUP HOLDINGS, LTD.Inventors: Toshinori ENOKIDO, Kazunobu WATANABE, Kouta SEGAMI, Yusuke KOBAYASHI
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Patent number: 10665668Abstract: A vertical MOSFET having a trench gate structure includes an n?-type drift layer and a p-type base layer formed by epitaxial growth. In the n?-type drift layer, an n-type region, an upper second p+-type region, a lower second p+-type region and a first p+-type region are provided. The lower second p+-type region is provided orthogonal to a trench, and a total mathematical area regions that are between the first p+-type region and the p-type base layer and that include the n-type region is at least two times a total mathematical area of regions that are between the first p+-type region and the p-type base layer and that include the upper second p+-type region.Type: GrantFiled: May 30, 2018Date of Patent: May 26, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Naoyuki Ohse, Shinsuke Harada, Takahito Kojima
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Patent number: 10660617Abstract: According to one embodiment, an ultrasonic probe includes a plurality of ultrasonic transducers, an electronic circuit, an insulative heat conductive spacer and an electrical heat supporting element. The electronic circuit is electrically connected to a plurality of transducers on one side. The insulative heat conductive spacer contacts with another side of the electronic circuit. The electrical heat supporting element has a contact region that makes contact, in a first surface, with the insulative heat conductive spacer, and a supporting structure that supports the insulative heat conductive spacer to have a predetermined thickness, and diffuses heat generated by the electronic circuit from the contact region.Type: GrantFiled: August 4, 2017Date of Patent: May 26, 2020Assignee: Canon Medical Systems CorporationInventors: Yusuke Kobayashi, Yasuhiro Ona, Takashi Takeuchi, Tomohiro Sato
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Patent number: 10651270Abstract: In a semiconductor device having a first p+-type base region, a second p+-type base region, a high-concentration n-type region selectively formed in an n-type silicon carbide epitaxial layer on an n+-type silicon carbide substrate; a p-type base layer formed on the n-type silicon carbide epitaxial layer; an n+-type source region and a p++-type contact region selectively formed in a surface layer of the p-type base layer; and a trench formed penetrating the p-type base layer and shallower than the second p+-type base region, in at least a part of the first p+-type base region, a region is shallower than the second p+-type base region as viewed from an element front surface side.Type: GrantFiled: December 26, 2017Date of Patent: May 12, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Naoyuki Ohse, Yusuke Kobayashi, Shinsuke Harada, Yasuhiko Oonishi
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Semiconductor device having semiconductor regions with an interval therebetween in a gate pad region
Patent number: 10629725Abstract: A vertical MOSFET having a trench gate structure includes an n?-type drift layer and a p-type base layer formed by epitaxial growth. In the n?-type drift layer, an n-type region, first p+-type regions, and a second p+-type region are provided. In a region opposing, in a depth direction, a gate electrode pad connected to a gate electrode, the first p+-type regions are provided with intervals therebetween along a width direction of the trench gate.Type: GrantFiled: October 23, 2018Date of Patent: April 21, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Manabu Takei, Shinsuke Harada, Naoyuki Ohse -
Patent number: 10622446Abstract: A semiconductor device includes in an active region in which current flows, an n+-type silicon carbide epitaxial layer of a low concentration and formed on an n+-type silicon carbide substrate; a p-type channel region constituting a channel region; a trench contacting the p-type channel region and having embedded therein an oxide film and a gate electrode; a p+-type base layer arranged beneath the trench; a third n-type CSL layer region contacting the p-type channel region; a second n-type CSL layer region having a maximum impurity concentration higher than that of the third n-type CSL layer region, the maximum impurity concentration being farther on a substrate front side than a top of the p+-type base layer arranged beneath the trench is; and a first n-type CSL layer region contacting the second n-type CSL layer region and having a maximum impurity concentration lower than that of the second n-type CSL layer region.Type: GrantFiled: August 1, 2017Date of Patent: April 14, 2020Assignee: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Akimasa Kinoshita, Shinsuke Harada
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Publication number: 20200096681Abstract: A transparent substrate having an antiglare function includes first and second faces. The transparent substrate has a resolution index value T, a reflected image diffusivity index value R, and a sparkle index value S satisfying T?0.25, R?0.8, and 0.75?S?0.95, respectively. The resolution index value T is calculated as (luminance of zero-degrees transmission light)/(luminance of total transmission light). The reflected image diffusivity index value R is calculated as (R2+R3)/(2×R1), where R1 denotes a luminance of reflected light reflected at first angle ?1, and R2, R3 denote luminance of reflected light at the second angle ?2, the third angle ?3, respectively, with respect to the first angle ?1. The sparkle index value S is calculated as 1?(Sa/Ss), where the first sparkle Sa and the second sparkle Ss denote a sparkle value of the transparent substrate and a sparkle value of a glass substrate, respectively.Type: ApplicationFiled: November 27, 2019Publication date: March 26, 2020Applicant: AGC Inc.Inventors: Aya YAMAMOTO, Yusuke Kobayashi, Yoshitaka Saijo
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Publication number: 20200083368Abstract: A first side wall and a second side wall of a trench are each an a-plane having high carrier mobility. Along the first side wall of the trench, a gate insulating film is provided. A gate electrode is provided in the trench, and across the gate insulating film, opposes a portion of a p-type base region between an n+-type source region and an n-type current spreading region. Along the second side wall of the trench, a conductive layer is provided. The conductive layer, at the second side wall of the trench, forms Schottky contacts with a p++-type contact region, the p-type base region, and the n-type current spreading region. The trench has a bottom corner portion that is at the second side wall and encompassed by a p+-type region that is provided in the n-type current spreading region so as to be separated from the p-type base region.Type: ApplicationFiled: July 22, 2019Publication date: March 12, 2020Applicant: FUJI ELECTRIC CO., LTD.Inventors: Yusuke KOBAYASHI, Manabu TAKEI, Shinsuke HARADA, Naoki KUMAGAI
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Publication number: 20200083369Abstract: A vertical MOSFET having a trench gate structure includes an n?-type drift layer and a p-type base layer formed by epitaxial growth. In the n?-type drift layer, an n-type region, a first p+-type region, and a second p+-type region are provided. A metal film of a trench SBD is connected to a source electrode; and a p+-type region is provided between the source electrode and the p-type base layer.Type: ApplicationFiled: July 22, 2019Publication date: March 12, 2020Applicant: FUJI ELECTRIC CO., LTD.Inventors: Yusuke Kobayashi, Manabu Takei, Naoki Kumagai
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Patent number: D881711Type: GrantFiled: November 27, 2018Date of Patent: April 21, 2020Assignee: S. T. CorporationInventors: Fumie Sugita, Yuki Shomura, Yusuke Kobayashi