Patents by Inventor Masahiko Hashimoto
Masahiko Hashimoto 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: 12271126Abstract: An image forming apparatus includes: a photosensitive drum; a magnetic roller; a transfer belt; a drum cleaning roller for collecting toner on the photosensitive drum and discharging collected toner to the photosensitive drum; a belt cleaner; a waste toner accommodating unit; and a controller configured to perform a printing operation for forming an image on a sheet and a cleaning operation for cleaning the drum cleaning roller. The controller is configured to perform: when performing the printing operation, collecting toner on the photosensitive drum using the drum cleaning roller; and when performing the cleaning operation, discharging the toner on the drum cleaning roller collected in the collecting to the photosensitive drum; transferring the toner on the photosensitive drum onto the transfer belt; and collecting the toner on the transfer belt using the belt cleaner so that the collected toner is accommodated in the waste toner accommodating unit.Type: GrantFiled: September 6, 2023Date of Patent: April 8, 2025Assignee: BROTHER KOGYO KABUSHIKI KAISHAInventors: Toshio Furukawa, Koji Ogawa, Fan Xu, Kazuma Hinoue, Hotaka Kakutani, Shintaro Fukuoka, Soun Kanada, Masahiko Hayakawa, Marika Ozaki, Masaki Ueji, Ayaka Komori, Enao Yamada, Miho Ishida, Keigo Nakajima, Shota Iriyama, Kengo Yada, Yuwen Wang, Junichi Hashimoto
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Publication number: 20240353246Abstract: A vibration propagation member is configured to operate by being bonded to one surface of a vibration means. The vibration propagation member includes: a top plate; a sidewall; and at least one vertical partition disposed perpendicularly to the top plate. The vibration propagation member has a plurality of membrane structures defined by the top plate and the at least one vertical partition.Type: ApplicationFiled: September 22, 2022Publication date: October 24, 2024Inventors: Makoto NAKANO, Masahiko HASHIMOTO, Masato SATOU, Tomoki MASUDA, Yuuji NAKABAYASHI, Hidetomo NAGAHARA
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Publication number: 20240228838Abstract: Provided is an adhesive composition that does not contain a solvent and that is excellent in productivity and self-adhesiveness. The object is attained by an adhesive composition containing an olefin-based polymer, in the adhesive composition, no inorganic particles being blended, and the adhesive composition having a storage modulus at 20° C. of 0 to 1.0×107 Pa, and a storage modulus at 40° C. of 5.3×105 Pa to 1.0×109 Pa.Type: ApplicationFiled: November 19, 2021Publication date: July 11, 2024Inventors: Hideki TSUKUDA, Masahiko HASHIMOTO
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Patent number: 11872809Abstract: To provide a head adjustment device, a head device, and a printing apparatus with which it is possible to perform automatic position adjustment of a head module in a head including one or more head modules. Provided is a head adjustment device (150) which adjusts a position of a head module in a head including one or more head modules, the head adjustment device (150) including an adjustment unit that includes an actuator that is connected to an adjustment member, which is operated in a case where the position of the head module is to be adjusted, and operates the adjustment member, a movement unit (248) that moves the adjustment unit relative to the head, and a movement control unit (244) that sets coordinates to be applied to the movement unit based on a reference position of the head module and moves the adjustment unit based on coordinate values of the adjustment member.Type: GrantFiled: September 14, 2021Date of Patent: January 16, 2024Assignee: FUJIFILM CorporationInventor: Masahiko Hashimoto
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Patent number: 11646052Abstract: A magnetic recording write head and system has a spin-torque oscillator (STO) located between the write head's write pole and trailing shield. The STO's ferromagnetic free layer is located near the write pole with a multilayer seed layer between the write pole and the free layer. The STO's nonmagnetic spacer layer is between the free layer and the STO's ferromagnetic polarizer. The polarizer may be the trailing shield of the write head, one or more separate polarizer layers, or combinations thereof. The STO electrical circuitry causes electron flow from the write pole to the trailing shield. The multilayer seed layer removes the spin polarization of electrons from the write pole, which enables electrons reflected from the polarizer layer to become spin polarized, which creates the spin transfer torque on the magnetization of the free layer. The multilayer seed layer includes a Mn or a Mn-alloy layer.Type: GrantFiled: April 12, 2021Date of Patent: May 9, 2023Assignee: Western Digital Technologies, Inc.Inventors: James Mac Freitag, Zheng Gao, Masahiko Hashimoto, Sangmun Oh
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Publication number: 20220001663Abstract: To provide a head adjustment device, a head device, and a printing apparatus with which it is possible to perform automatic position adjustment of a head module in a head including one or more head modules. Provided is a head adjustment device (150) which adjusts a position of a head module in a head including one or more head modules, the head adjustment device (150) including an adjustment unit that includes an actuator that is connected to an adjustment member, which is operated in a case where the position of the head module is to be adjusted, and operates the adjustment member, a movement unit (248) that moves the adjustment unit relative to the head, and a movement control unit (244) that sets coordinates to be applied to the movement unit based on a reference position of the head module and moves the adjustment unit based on coordinate values of the adjustment member.Type: ApplicationFiled: September 14, 2021Publication date: January 6, 2022Applicant: FUJIFILM CorporationInventor: Masahiko HASHIMOTO
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Publication number: 20210233560Abstract: A magnetic recording write head and system has a spin-torque oscillator (STO) located between the write head's write pole and trailing shield. The STO's ferromagnetic free layer is located near the write pole with a multilayer seed layer between the write pole and the free layer. The STO's nonmagnetic spacer layer is between the free layer and the STO's ferromagnetic polarizer. The polarizer may be the trailing shield of the write head, one or more separate polarizer layers, or combinations thereof. The STO electrical circuitry causes electron flow from the write pole to the trailing shield. The multilayer seed layer removes the spin polarization of electrons from the write pole, which enables electrons reflected from the polarizer layer to become spin polarized, which creates the spin transfer torque on the magnetization of the free layer. The multilayer seed layer includes a Mn or a Mn-alloy layer.Type: ApplicationFiled: April 12, 2021Publication date: July 29, 2021Applicant: Western Digital Technologies, Inc.Inventors: James Mac FREITAG, Zheng GAO, Masahiko HASHIMOTO, Sangmun OH
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Patent number: 10997992Abstract: A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic free layer near the substrate, a ferromagnetic polarizing layer and a nonmagnetic spacer layer between the free layer and the polarizing layer. A multilayer structure is located between the substrate and the free layer. The multilayer structure includes a metal or metal alloy seed layer for the free layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the free layer and thus reduces undesirable damping of the oscillation of the free layer's magnetization by the seed layer.Type: GrantFiled: September 16, 2019Date of Patent: May 4, 2021Assignee: Western Digital Technologies, Inc.Inventors: James Mac Freitag, Susumu Okamura, Masahiko Hashimoto, Zheng Gao
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Patent number: 10997993Abstract: A magnetic recording write head and system has a spin-torque oscillator (STO) located between the write head's write pole and trailing shield. The STO's ferromagnetic free layer is located near the write pole with a multilayer seed layer between the write pole and the free layer. The STO's nonmagnetic spacer layer is between the free layer and the STO's ferromagnetic polarizer. The polarizer may be the trailing shield of the write head, one or more separate polarizer layers, or combinations thereof. The STO electrical circuitry causes electron flow from the write pole to the trailing shield. The multilayer seed layer removes the spin polarization of electrons from the write pole, which enables electrons reflected from the polarizer layer to become spin polarized, which creates the spin transfer torque on the magnetization of the free layer. The multilayer seed layer includes a Mn or a Mn-alloy layer.Type: GrantFiled: February 14, 2020Date of Patent: May 4, 2021Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: James Mac Freitag, Zheng Gao, Masahiko Hashimoto, Sangmun Oh
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Patent number: 10867625Abstract: A spin transfer torque (STT) device has a free ferromagnetic layer that includes a Heusler alloy layer and a template layer beneath and in contact with the Heusler alloy layer. The template layer may be a ferromagnetic alloy comprising one or more of Co, Ni and Fe and the element X, where X is selected from one or more of Ta, B, Hf, Zr, W, Nb and Mo. A CoFe nanolayer may be formed below and in contact with the template layer. The STT device may be a spin-torque oscillator (STO), like a STO incorporated into the write head of a magnetic recording disk drive. The STT device may also be a STT in-plane or perpendicular magnetic tunnel junction (MTJ) cell for magnetic random access memory (MRAM). The template layer reduces the critical current density of the STT device.Type: GrantFiled: February 27, 2020Date of Patent: December 15, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INCInventors: James Mac Freitag, Zheng Gao, Masahiko Hashimoto, Sangmun Oh, Hua Ai Zeng
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Patent number: 10839833Abstract: A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic polarizer layer near the substrate, a ferromagnetic free layer, and a nonmagnetic spacer layer between the ferromagnetic polarizer layer and the ferromagnetic free layer. A multilayer structure is located between the substrate and the ferromagnetic polarizer layer. The multilayer structure includes a metal or metal alloy seed layer for the ferromagnetic polarizer layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the write pole and thus reduces undesirable spin pumping of the ferromagnetic polarizer layer.Type: GrantFiled: February 27, 2020Date of Patent: November 17, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INCInventors: James Mac Freitag, Masahiko Hashimoto, Zheng Gao, Susumu Okamura
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Patent number: 10823848Abstract: A detection apparatus that includes correlation processing systems that each find a correlation between a predetermined code sequence and a wave detection signal obtained by detecting a phase-modulated input wave at a frequency different from a frequency used by a different one of the correlation processing systems, and thereby generate a correlation signal, level reduction processors that each receive the correlation signal from a corresponding one of the plurality of correlation processing systems and reduce a level of the received correlation signal when the correlation signal is not to be used for detection of the target or do not reduce the level of the received correlation signal when the correlation signal is to be used for detection of the target, and a detector that detects at least presence or absence of the target based on the correlation signal processed by each of the plurality of level reduction processors.Type: GrantFiled: February 27, 2018Date of Patent: November 3, 2020Assignee: Panasonic Intellectual Property Management Co., Ltd.Inventors: Tadashi Morita, Masahiko Hashimoto
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Patent number: 10734013Abstract: Spin transfer torque (STT) devices with multilayer seed layers that can be used in magnetic recording and memory are provided. One such STT device includes a substrate, and a stack of layers formed on the substrate, where the stack includes a first seed layer directly on the substrate and including Cr, a second seed layer on the first seed layer and including Ta, a ferromagnetic free layer on the second seed layer; a ferromagnetic polarizing layer, and a nonmagnetic spacer layer between the free layer and the polarizing layer. One such method includes fabricating the STT device.Type: GrantFiled: February 15, 2019Date of Patent: August 4, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: Zheng Gao, Masahiko Hashimoto, Susumu Okamura, James Mac Freitag
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Patent number: 10566015Abstract: A spin transfer torque (STT) device has a free ferromagnetic layer that includes a Heusler alloy layer and a template layer beneath and in contact with the Heusler alloy layer. The template layer may be a ferromagnetic alloy comprising one or more of Co, Ni and Fe and the element X, where X is selected from one or, more of Ta, B, Hf, Zr, W, Nb and Mo. A CoFe nanolayer may be formed below and in contact with the template layer. The STT device may be a spin-torque oscillator (STO), like a STO incorporated into the write head of a magnetic recording disk drive. The STT device may also be a STT in-plane or perpendicular magnetic tunnel junction (MTJ) cell for magnetic random access memory (MRAM). The template layer reduces the critical current density of the STT device.Type: GrantFiled: May 10, 2018Date of Patent: February 18, 2020Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: James Mac Freitag, Zheng Gao, Masahiko Hashimoto, Sangmun Oh, Hua Al Zeng
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Publication number: 20200013429Abstract: A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic free layer near the substrate, a ferromagnetic polarizing layer and a nonmagnetic spacer layer between the free layer and the polarizing layer. A multilayer structure is located between the substrate and the free layer. The multilayer structure includes a metal or metal alloy seed layer for the free layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the free layer and thus reduces undesirable damping of the oscillation of the free layer's magnetization by the seed layer.Type: ApplicationFiled: September 16, 2019Publication date: January 9, 2020Applicants: Western Digital Technologies, Inc., Western Digital Technologies, Inc.Inventors: James Mac FREITAG, Susumu OKAMURA, Masahiko HASHIMOTO, Zheng GAO
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Patent number: 10460752Abstract: A magnetic recording write head and system has a spin-torque oscillator (STO) located between the write head's write pole and trailing shield. The STO's ferromagnetic free layer is located near the write pole with a multilayer seed layer between the write pole and the free layer. The STO's nonmagnetic spacer layer is between the free layer and the STO's ferromagnetic polarizer. The polarizer may be the trailing shield of the write head or a separate polarizer layer. The STO electrical circuitry causes electron flow from the write pole to the trailing shield. The multilayer seed layer removes the spin polarization of electrons from the write pole, which enables electrons reflected from the polarizer layer to become spin polarized, which creates the spin transfer torque on the magnetization of the free layer. The multilayer seed layer includes Mn or a Mn-alloy layer between one or more metal or metal alloy films.Type: GrantFiled: May 10, 2018Date of Patent: October 29, 2019Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: James Mac Freitag, Zheng Gao, Masahiko Hashimoto, Sangmun Oh
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Patent number: 10446175Abstract: A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic free layer near the substrate, a ferromagnetic polarizing layer and a nonmagnetic spacer layer between the free layer and the polarizing layer. A multilayer structure is located between the substrate and the free layer. The multilayer structure includes a metal or metal alloy seed layer for the free layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the free layer and thus reduces undesirable damping of the oscillation of the free layer's magnetization by the seed layer.Type: GrantFiled: May 16, 2017Date of Patent: October 15, 2019Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: James Mac Freitag, Susumu Okamura, Masahiko Hashimoto, Zheng Gao
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Publication number: 20190279666Abstract: A spin transfer torque (STT) device is formed on an electrically conductive substrate and includes a ferromagnetic free layer near the substrate, a ferromagnetic polarizing layer and a nonmagnetic spacer layer between the free layer and the polarizing layer. A multilayer structure is located between the substrate and the free layer. The multilayer structure includes a metal or metal alloy seed layer for the free layer and an intermediate oxide layer below and in contact with the seed layer. The intermediate oxide layer reflects spin current from the free layer and thus reduces undesirable damping of the oscillation of the free layer's magnetization by the seed layer.Type: ApplicationFiled: May 16, 2017Publication date: September 12, 2019Inventors: James Mac Freitag, Susumu Okamura, Masahiko Hashimoto, Zheng Gao
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Publication number: 20190279667Abstract: A spin transfer torque (STT) device has a free ferromagnetic layer that includes a Heusler alloy layer and a template layer beneath and in contact with the Heusler alloy layer. The template layer may be a ferromagnetic alloy comprising one or more of Co, Ni and Fe and the element X, where X is selected from one or more of Ta, B, Hf, Zr, W, Nb and Mo. A CoFe nanolayer may be formed below and in contact with the template layer. The STT device may be a spin-torque oscillator (STO), like a STO incorporated into the write head of a magnetic recording disk drive. The STT device may also be a STT in-plane or perpendicular magnetic tunnel junction (MTJ) cell for magnetic random access memory (MRAM). The template layer reduces the critical current density of the STT device.Type: ApplicationFiled: May 10, 2018Publication date: September 12, 2019Applicant: WESTERN DIGITAL TECHNOLOGIES, INC.Inventors: JAMES MAC FREITAG, ZHENG GAO, MASAHIKO HASHIMOTO, SANGMUN OH, HUA AI ZENG
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Publication number: 20190279668Abstract: A magnetic recording write head and system has a spin-torque oscillator (STO) located between the write head's write pole and trailing shield. The STO's ferromagnetic free layer is located near the write pole with a multilayer seed layer between the write pole and the free layer. The STO's nonmagnetic spacer layer is between the free layer and the STO's ferromagnetic polarizer. The polarizer may be the trailing shield of the write head or a separate polarizer layer. The STO electrical circuitry causes electron flow from the write pole to the trailing shield. The multilayer seed layer removes the spin polarization of electrons from the write pole, which enables electrons reflected from the polarizer layer to become spin polarized, which creates the spin transfer torque on the magnetization of the free layer. The multilayer seed layer includes Mn or a Mn-alloy layer between one or more metal or metal alloy films.Type: ApplicationFiled: May 10, 2018Publication date: September 12, 2019Inventors: James Mac FREITAG, Zheng GAO, Masahiko HASHIMOTO, Sangmun OH