Patents by Inventor Ryuta Yamaguchi
Ryuta Yamaguchi 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: 20240113690Abstract: A method for manufacturing a vibrator includes a preparation step of preparing a quartz crystal substrate having a first surface and a second surface which are in a front and back relationship, a first film formation step of forming a first stacked body by sequentially stacking a first underlying film, a second underlying film, and a first protective film at the first surface, a first patterning step of patterning the first stacked body in a manner in which the first underlying film, the second underlying film, and the first protective film remain in a region of an element formation region other than a first groove formation region and a second groove formation region, the first underlying film and the second underlying film remain in the first groove formation region, and the first underlying film remains in the second groove formation region, and a first dry etching step of dry etching the quartz crystal substrate from the first surface through the first stacked body.Type: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Inventors: Tsukasa Watanabe, Keiichi Yamaguchi, Shigeru Shiraishi, Ryuta Nishizawa
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Publication number: 20240110786Abstract: A method for manufacturing a vibrator includes a preparation step of preparing a quartz crystal substrate having a first surface and a second surface that are in a front and back relationship, a first protective film formation step of forming a first protective film in an element formation region of the first surface, the first protective film having a first opening overlapping a first groove formation region and a second opening overlapping a second groove formation region, in which a region of the quartz crystal substrate where the vibrator is formed is referred to as the element formation region, a region where the first groove is formed is referred to as the first groove formation region, and a region where the second groove is formed is referred to as the second groove formation region, and a first dry etching step of dry etching the quartz crystal substrate from the first surface through the first protective film.Type: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Inventors: Hiyori Sakata, Keiichi Yamaguchi, Ryuta Nishizawa, Shigeru Shiraishi
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Publication number: 20240110787Abstract: A method for manufacturing a vibrator includes a preparation step of preparing a quartz crystal substrate having a first surface and a second surface which are in a front and back relationship, a first protective film formation step of forming a first protective film in an element formation region of the quartz crystal substrate at the first surface where the vibrator is formed; and a first dry etching step of dry etching the quartz crystal substrate from the first surface through the first protective film. R1>R2, in which R1 is a thickness of the first protective film in a first groove formation region of the quartz crystal substrate where the first groove is formed and R2 is a thickness of the first protective film in the second groove formation region where the second groove is formed.Type: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Inventors: Kosuke Ariizumi, Keiichi Yamaguchi, Shigeru Shiraishi, Ryuta Nishizawa
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Publication number: 20240113691Abstract: A method for manufacturing a vibrator includes a preparation step of preparing a quartz crystal substrate having a first surface and a second surface which are in a front and back relationship, a first protective film formation step of forming a first protective film in a second groove formation region when a region of the quartz crystal substrate where the vibrator is formed is referred to as an element formation region, a region where the first groove is formed is referred to as a first groove formation region, and a region where the second groove is formed is referred to as the second groove formation region, a second protective film formation step of forming, in the first groove formation region, a second protective film having a lower etching rate than the first protective film, a third protective film formation step of forming a third protective film in a region of the element formation region other than the first groove formation region and the second groove formation region, and a first dry etching stType: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Inventors: Tsukasa Watanabe, Keiichi Yamaguchi, Shigeru Shiraishi, Ryuta Nishizawa
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Publication number: 20240113692Abstract: A method for manufacturing a vibrator includes a preparation step of preparing a quartz crystal substrate having a first surface and a second surface which are in a front and back relationship, a first protective film formation step of forming a first protective film in a region of an element formation region other than a first groove formation region and a second groove formation region when a region of the quartz crystal substrate where the vibrator is formed is referred to as the element formation region, a region where the first groove is formed is referred to as the first groove formation region, and a region where the second groove is formed is referred to as the second groove formation region, a first dry etching step of dry etching the quartz crystal substrate from the first surface through the first protective film, a second protective film formation step of forming a second protective film in the first groove formation region, and a second dry etching step of dry etching the quartz crystal substrateType: ApplicationFiled: September 27, 2023Publication date: April 4, 2024Inventors: Tsukasa Watanabe, Keiichi Yamaguchi, Shigeru Shiraishi, Ryuta Nishizawa
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Patent number: 11940275Abstract: A vibrator device includes a vibrator element, and a support substrate configured to support the vibrator element. The vibrator element includes a drive arm provided with a drive signal electrode and a drive constant-potential electrode, and a detection arm provided with a detection signal electrode and a detection constant-potential electrode. The support substrate includes a base, and a drive signal interconnection electrically coupled to the drive signal electrode, a drive constant-potential interconnection electrically coupled to the drive constant-potential electrode, and a detection signal interconnection electrically coupled to the detection signal electrode all provided to the base, and the drive arm includes a first surface located at the support substrate side, and a second surface located at an opposite side to the first surface. Further, the drive constant-potential electrode is disposed on the first surface, and the drive signal electrode is disposed on the second surface.Type: GrantFiled: April 12, 2022Date of Patent: March 26, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Seiichiro Ogura, Keiichi Yamaguchi, Ryuta Nishizawa
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Publication number: 20240069057Abstract: An angular velocity detection element includes: a drive vibration arm configured to perform flexural vibration according to an applied drive signal; and a detection vibration arm configured to perform flexural vibration according to an applied angular velocity. Each of the drive vibration arm and the detection vibration arm has a bottomed groove portion along an extending direction. d2/t2>d1/t1, in which t1 is a thickness of the drive vibration arm, d1 is a depth of the groove portion of the drive vibration arm, t2 is a thickness of the detection vibration arm, and d2 is a depth of the groove portion of the detection vibration arm.Type: ApplicationFiled: August 28, 2023Publication date: February 29, 2024Inventors: Seiichiro OGURA, Keiichi YAMAGUCHI, Ryuta NISHIZAWA
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Patent number: 11916538Abstract: A vibrator device includes a vibrating body having obverse and reverse principal surfaces and a side surface connecting the obverse and reverse principal surfaces to each other, a package configured to house the vibrating body, and a bonding material configured to fix the vibrating body to the package, wherein the vibrating body has a coupling part including a recess recessed from the side surface toward a center of the principal surfaces, and a protrusion protruding from a side surface of the recess, the protrusion is one of breaking-off parts with which a plurality of the vibrating bodies is broken off from a wafer to which the plurality of the vibrating bodies is coupled, and the bonding material has contact with a side surface of the protrusion in the recess.Type: GrantFiled: January 19, 2021Date of Patent: February 27, 2024Assignee: SEIKO EPSON CORPORATIONInventors: Seiichiro Ogura, Keiichi Yamaguchi, Ryuta Nishizawa
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Publication number: 20230173924Abstract: A power supply system includes a storage battery and first and second current sensors for detecting electric current flowing to the storage battery. The second current sensor has a wider current detection range than the first current sensor. A storage battery control apparatus includes: an abnormality determination unit that determines whether an abnormality has occurred in the first current sensor; a first charging control unit that performs, when no abnormality has occurred in the first current sensor, a charging completion determination based on the electric current detected by the first current sensor; and a second charging control unit that performs, when an abnormality has occurred in the first current sensor, the charging completion determination based on the electric current detected by the second current sensor. The first charging control unit and the second charging control unit have different determination criteria for determining completion of the charging of the storage battery.Type: ApplicationFiled: January 9, 2023Publication date: June 8, 2023Applicant: DENSO CORPORATIONInventors: Ryuta YAMAGUCHI, Yamato UTSUNOMIYA
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Patent number: 10184169Abstract: Provided is a method for supplying a deposition material including a heating step of heating and evaporating a deposition material accommodated in a material accommodating section in which the deposition material is accommodated, a supply step of supplying the deposition material into the material accommodating section by feeding and melting a deposition material in a solid phase toward the melted deposition material in the material accommodating section, and a melted state detection step of detecting a melted state of the deposition material in the solid phase after supply in the supply step.Type: GrantFiled: October 19, 2012Date of Patent: January 22, 2019Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.Inventors: Ryuta Yamaguchi, Tetsuya Goto, Nobuyuki Shigeoka
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Patent number: 9899649Abstract: A non-aqueous electrolyte secondary battery, when using an aqueous binder as a binder for a negative electrode active material, effectively exhausts the gas generated from an electrode, and thus, even when using it for a long period of time, a decrease in battery capacity is low. The non-aqueous electrolyte secondary battery includes a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer comprising an aqueous binder on a surface of a negative electrode current collector, a separator for maintaining an electrolytic solution, and a gas releasing means for releasing a gas generated within the power generating element to an extra space inside of the outer casing, and in which the ratio value of a volume of the extra space to a volume of pores included in the power generating element is 0.5 to 1.0.Type: GrantFiled: March 26, 2014Date of Patent: February 20, 2018Assignees: Nissan Motor Co. Ltd., Automotive Energy Supply CorporationInventors: Fumihiro Kawamura, Ikuma Matsuzaki, Ryuta Yamaguchi, Kosuke Hagiyama, Takashi Honda, Takeshi Miyamoto, Osamu Shimamura, Keisuke Matsumoto
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Patent number: 9847516Abstract: A non-aqueous electrolyte secondary battery allows gas generated when an aqueous binder is used as a binder of a negative electrode active material to be effectively discharged from the electrode, and has small decrease of the battery capacity despite use over a long period of time. The non-aqueous electrolyte secondary battery has a positive electrode active material layer, a negative electrode active material layer, and a separator. The density of the negative electrode active material layer is 1.4 to 1.6 g/cm3, an electrolyte solution layer is disposed between at least one layer of the negative electrode active material layer and the positive electrode active material layer, and the separator, and the ratio of total thickness of the positive electrode, the negative electrode and the separator to total thickness of the positive electrode, the negative electrode, the separator and the electrolyte solution layer, is 0.85 or more and less than 1.0.Type: GrantFiled: March 26, 2014Date of Patent: December 19, 2017Assignees: Nissan Motor Co., Ltd., Automotive Energy Supply CorporationInventors: Kosuke Hagiyama, Takashi Honda, Ryuta Yamaguchi, Ikuma Matsuzaki, Takeshi Miyamoto, Osamu Shimamura, Keisuke Matsumoto
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Publication number: 20160149178Abstract: A non-aqueous electrolyte secondary battery, when using an aqueous binder as a binder for a negative electrode active material, effectively exhausts the gas generated from an electrode, and thus, even when using it for a long period of time, a decrease in battery capacity is low. The non-aqueous electrolyte secondary battery includes a positive electrode active material layer on a surface of a positive electrode current collector, a negative electrode active material layer comprising an aqueous binder on a surface of a negative electrode current collector, a separator for maintaining an electrolytic solution, and a gas releasing means for releasing a gas generated within the power generating element to an extra space inside of the outer casing, and in which the ratio value of a volume f the extra space to a volume of pores included in the power generating element is 0.5 to 1.0.Type: ApplicationFiled: March 26, 2014Publication date: May 26, 2016Inventors: Fumihiro KAWAMURA, Ikuma MATSUZAKI, Ryuta YAMAGUCHI, Kosuke HAGIYAMA, Takashi HONDA, Takeshi MIYAMOTO, Osamu SHIMAMURA, Keisuke MATSUMOTO
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Publication number: 20160056419Abstract: A non-aqueous electrolyte secondary battery allows gas generated when an aqueous binder is used as a binder of a negative electrode active material to be effectively discharged from the electrode, and has small decrease of the battery capacity despite use over a long period of time. The non-aqueous electrolyte secondary battery has a positive electrode active material layer, a negative electrode active material layer, and a separator. The density of the negative electrode active material layer is 1.4 to 1.6 g/cm3, an electrolyte solution layer is disposed between at least one layer of the negative electrode active material layer and the positive electrode active material layer, and the separator, and the ratio of total thickness of the positive electrode, the negative electrode and the separator to total thickness of the positive electrode, the negative electrode, the separator and the electrolyte solution layer, is 0.85 or more and less than 1.0.Type: ApplicationFiled: March 26, 2014Publication date: February 25, 2016Inventors: Kosuke HAGIYAMA, Takashi HONDA, Ryuta YAMAGUCHI, Ikuma MATSUZAKI, Takeshi MIYAMOTO, Osamu SHIMAMURA, Keisuke MATSUMOTO
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Publication number: 20150203958Abstract: Provided is a method for supplying a deposition material including a heating step of heating and evaporating a deposition material accommodated in a material accommodating section in which the deposition material is accommodated, a supply step of supplying the deposition material into the material accommodating section by feeding and melting a deposition material in a solid phase toward the melted deposition material in the material accommodating section, and a melted state detection step of detecting a melted state of the deposition material in the solid phase after supply in the supply step.Type: ApplicationFiled: October 19, 2012Publication date: July 23, 2015Inventors: Ryuta Yamaguchi, Tetsuya Goto, Nobuyuki Shigeoka
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Publication number: 20120291239Abstract: A tongue comprises a housing case in a substantially box form for housing a tongue plate and inclusive of a through hole formed at a position facing an insertion hole of the tongue plate so as to allow insertion of a webbing, and a stopper bar, with a folded portion of the webbing hung therearound, which is arranged striding over the insertion hole of the tongue plate, allowed to slide back and forth with reference to the tongue plate and urged rearward by a urging unit in contact with a pair of front end surfaces on a pair of engagement parts provided at longitudinal ends of the stopper bar. The housing case includes a plurality of ribs arranged upright on an inner surface thereof along a front-rear direction so as to press the webbing which is arranged to face the inner surface and hung around the stopper bar meets. The plurality of ribs are arranged in parallel to one another in a direction orthogonal to a sliding direction of the stopper bar.Type: ApplicationFiled: March 3, 2011Publication date: November 22, 2012Applicant: ASHIMORI INDUSTRY CO., LTD.Inventor: Ryuta Yamaguchi
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Patent number: 8284438Abstract: Disclosed is an image forming method to perform a printing for a plurality of sheets of paper, comprising: expressing any one region in a first color, the one region being one of a predetermined number of regions which are provided at an end part of each sheet of the plurality of sheets of paper and are continuous in an extending direction of the end part of the sheets; expressing the other regions except the one region in a second color; and printing an additional image in which the one region expressed in the first color is shifted sequentially in the extending direction of the end part of the sheets, in an order of the printing of each sheet of paper.Type: GrantFiled: November 10, 2008Date of Patent: October 9, 2012Assignee: Konica Minolta Business Technologies, Inc.Inventors: Ryuta Yamaguchi, Kenji Ogasawara
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Publication number: 20090147280Abstract: Disclosed is an image forming method to perform a printing for a plurality of sheets of paper, comprising: expressing any one region in a first color, the one region being one of a predetermined number of regions which are provided at an end part of each sheet of the plurality of sheets of paper and are continuous in an extending direction of the end part of the sheets; expressing the other regions except the one region in a second color; and printing an additional image in which the one region expressed in the first color is shifted sequentially in the extending direction of the end part of the sheets, in an order of the printing of each sheet of paper.Type: ApplicationFiled: November 10, 2008Publication date: June 11, 2009Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.Inventors: Ryuta YAMAGUCHI, Kenji Ogasawara
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Publication number: 20090068069Abstract: [Problems] To provide a means for preventing metal contamination for articles to be used in fields in need of reduced metal contamination. [Means for Solving] An article has a titanium oxide film formed over portions to be in contact with a liquid or portions to be in contact with a vapor.Type: ApplicationFiled: March 29, 2006Publication date: March 12, 2009Inventors: Masao Yamase, Ryuta Yamaguchi
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Publication number: 20090037076Abstract: In a method of injecting a fluid with a liquid-to-gas phase transition, the fluid is injected via a specified path of a change in an isobaric specific heat capacity per volume [Cp/V] of the fluid, the specified path leading from a temperature-pressure condition (i) to a temperature-pressure condition (ii). The condition (i) realizes an equality [Cp/V]=[Cp/V]L, where [Cp/V]L denotes an isobaric specific heat capacity per volume of the fluid in the liquid phase. The temperature-pressure condition (ii) realizes an equality [Cp/V]=[Cp/V]J, where [Cp/V]J denotes an isobaric specific heat capacity per volume of the fluid at timing of injection. The value [Cp/V]J is less than the value [Cp/V]L and included in a temperature-pressure region extending in close proximity to a high-temperature side of a temperature-pressure region corresponding to a temperature-pressure condition (iii) that realizes an isobaric specific heat capacity per volume [Cp/V]C greater than the value [Cp/V]L.Type: ApplicationFiled: June 25, 2008Publication date: February 5, 2009Inventors: Kenzo OSHIHARA, Ai SUZUKI, Masaki KOJIMA, Ryuta YAMAGUCHI