Patents by Inventor Shoji Suzuki
Shoji Suzuki 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: 20240118394Abstract: There are provided a device and a method that execute light output control that eliminates an occlusion region and does not disturb blinking pattern light of a mobile device. At least one of a light application region or a light output timing of output light of a light output unit is determined on the basis of a data analysis result based on sensor input information and reception information from another device, the light output unit is controlled according to the light application region or the light output timing that has been determined, and a light output process is executed. Specifically, for example, light output control is executed so as to eliminate an occlusion region which no light reaches due to a pillar or the like, and moreover, so as not to disturb blinking pattern light output from the mobile device.Type: ApplicationFiled: January 20, 2022Publication date: April 11, 2024Applicant: Sony Group CorporationInventors: Hirotaka TANAKA, Shoji MATSUDA, Katsunori HONMA, Satoshi SUZUKI
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Publication number: 20240101463Abstract: A glass sheet configured to be cut into glass substrates for magnetic recording disks is described. The glass sheet includes a first surface. For surface features of the first surface with a feature wavelength of 60 to 500 micrometers (?m), a root mean square of a surface topography of the surface features determined using a surface analysis on the first surface with incident and reflected light is given as a microwaviness. A maximum value of the microwaviness of any arbitrary region of the first surface may be between 1.2 nanometers (nm) and 2.8 nm, inclusive of 1.2 nm and 2.8 nm. After the surface analysis, the glass sheet may be cut into the glass substrates in response to determining that the maximum value of the microwaviness is in the noted range. Further, a method of fabricating glass substrates from a glass sheet is described.Type: ApplicationFiled: September 28, 2022Publication date: March 28, 2024Inventors: Shoji Suzuki, Mary Grace Shieh
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Publication number: 20230386516Abstract: A disk for a magnetic recording apparatus. The disk includes a substrate comprising a first surface and a second surface, wherein the substrate has a substrate thickness. The disk includes a first coating layer disposed over the first surface of the substrate, wherein the first coating layer has a first coating layer thickness. The disk includes a second coating layer disposed over the second surface of the substrate, wherein the second coating layer has a second coating layer thickness. The disk has a disk thickness, wherein the disk thickness includes the substrate thickness. The maximum thickness difference between the first coating layer thickness and the second coating layer thickness is a function of the square of the disk thickness.Type: ApplicationFiled: August 14, 2023Publication date: November 30, 2023Inventors: Shoji Suzuki, John Michael Bianchini
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Publication number: 20230335162Abstract: A disk for use in hard disk drives (HDD) or other magnetic recording apparatus is provided that includes a pair of plating layers, such as polished nickel-phosphorous (NiP) layers, on opposing sides of substrate, such as an aluminum-magnesium (Al—Mg) alloy substrate. The thicknesses of the two polished plating layers are set so that a ratio (by percentage) of the combined thickness of the polished layers is about 3% of the total thickness of the disk. The ratio of about 3% is employed based on a finding that this thickness ratio provides a beneficial tradeoff between disk rigidity and disk weight, particularly for use with polished NiP coatings on Al—Mg alloy substrates. Multi-platter stacks of the disks are described. Methods are also described for fabricating such disks.Type: ApplicationFiled: April 13, 2022Publication date: October 19, 2023Inventors: Shoji Suzuki, Ling Huat Yap, Ming Shian Liew, Lih Shan Lim
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Patent number: 11664050Abstract: A disk for a magnetic recording apparatus is described. The disk includes a first surface extending along a first plane, a second surface extending along a second plane parallel to the first plane, and a disk thickness between the first surface and the second surface, measured along a first direction substantially normal to the first surface. The disk further includes an edge surface disposed along a perimeter of the disk and between the first surface and the second surface, where the edge surface extends along a third plane substantially perpendicular to the first surface, a first chamfer disposed between the first surface and the edge surface, and a second chamfer disposed between the second surface and the edge surface. In an aspect, a length of the edge surface measured along the first direction may be between 40% and 80% of the disk thickness.Type: GrantFiled: December 6, 2021Date of Patent: May 30, 2023Assignee: Western Digital Technologies, Inc.Inventors: Shoji Suzuki, Kirk B. Cheng
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Publication number: 20230110894Abstract: Disks for use in hard disk drives (HDD) or other magnetic recording apparatus. The disks are configured based on a finding that internal stress within a disk can make the disk more resistant to shock forces. In one example, a disk is provided that has a substrate with a thickness of no more than 0.5 millimeters and an internal stress no less than 300 megapascals. The relatively high internal stress within the substrate of the disk serves to reduce the magnitude of deflections caused by mechanical shocks to an HDD in which the disk is installed, as compared to other disks of equal thickness but with relatively less internal stress. Multi-platter stacks of the disks are described. Methods are also described for fabricating such disks and for rejecting disks that do not meet certain internal stress-based criteria. Substrates are also described.Type: ApplicationFiled: October 1, 2021Publication date: April 13, 2023Inventor: Shoji Suzuki
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Publication number: 20230104944Abstract: A disk for a magnetic recording apparatus is described. The disk includes a first surface extending along a first plane, a second surface extending along a second plane parallel to the first plane, and a disk thickness between the first surface and the second surface, measured along a first direction substantially normal to the first surface. The disk further includes an edge surface disposed along a perimeter of the disk and between the first surface and the second surface, where the edge surface extends along a third plane substantially perpendicular to the first surface, a first chamfer disposed between the first surface and the edge surface, and a second chamfer disposed between the second surface and the edge surface. In an aspect, a length of the edge surface measured along the first direction may be between 40% and 80% of the disk thickness.Type: ApplicationFiled: December 6, 2021Publication date: April 6, 2023Inventors: Shoji Suzuki, Kirk B. Cheng
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Patent number: 11518672Abstract: A fluid pressure feeding device includes: a follower plate that is inserted into a tank, that applies a pressing force to a fluid, and that has an opening for pumping up the fluid from an inside of the tank; a pump having a primer plate configured to exhibit reciprocating movement to pump up the fluid in the tank into a pump internal space; and a position control unit configured to control a position of the primer plate within a range of the reciprocating movement. An outer shape of the primer plate substantially matches a shape of the opening of the follower plate, and the position control unit is configured such that the primer plate is positioned in the opening of the follower plate when the follower plate is taken out from the tank.Type: GrantFiled: December 30, 2020Date of Patent: December 6, 2022Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, PYLES JAPAN Co., LTD., TOYOTA PRODUCTION ENGINEERINGInventors: Masahiro Tasaka, Kunimi Abiru, Shoji Suzuki, Takatoshi Urashi, Katsura Hara, Tomohiro Tokunaga, Naoki Yamaguchi
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Patent number: 11270724Abstract: Techniques for determining a maximum permissible media deposition temperature for depositing one or more layers over a substrate of a heat assisted magnetic recording (HAMR) platform. In one aspect, a method includes controlling a thermomechanical analyzer to measure the mechanical expansion of a glass material versus temperature within a temperature range that is below the primary transformation temperature (Tg) of the glass material to detect a possible initial transformation that occurs within the glass material at a temperature (Tt) below the primary transformation temperature (Tg). If such an initial transformation is detected, the maximum deposition temperature is set based on the initial transformation temperature (Tt), rather than on the primary transformation temperature (Tg). Otherwise, the maximum permissible media deposition temperature is set based on the transformation temperature (Tg).Type: GrantFiled: May 14, 2021Date of Patent: March 8, 2022Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventor: Shoji Suzuki
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Patent number: 11227634Abstract: Aspects of the disclosure provide for mitigating a coefficient of thermal expansion (CTE) mismatch between glass components and adjacent metal components in a disk storage device to improve thermal and shock performance. The methods and apparatus provide a hub, provide a first recording disk comprising a glass material and a center hole on the hub such that the hub extends through the center hole of the first recording disk, provide a first spacer on the first recording disk, the first spacer comprising a nickel-iron alloy, and provide a second recording disk comprising a glass material and a center hole on the first spacer such that the hub extends through the center hole of the second recording disk, wherein the first recording disk and the second recording disk each comprise a magnetic recording layer configured to store information.Type: GrantFiled: June 29, 2020Date of Patent: January 18, 2022Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.Inventor: Shoji Suzuki
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Publication number: 20210407551Abstract: Aspects of the disclosure provide for mitigating a coefficient of thermal expansion (CTE) mismatch between glass components and adjacent metal components in a disk storage device to improve thermal and shock performance. The methods and apparatus provide a hub, provide a first recording disk comprising a glass material and a center hole on the hub such that the hub extends through the center hole of the first recording disk, provide a first spacer on the first recording disk, the first spacer comprising a nickel-iron alloy, and provide a second recording disk comprising a glass material and a center hole on the first spacer such that the hub extends through the center hole of the second recording disk, wherein the first recording disk and the second recording disk each comprise a magnetic recording layer configured to store information.Type: ApplicationFiled: June 29, 2020Publication date: December 30, 2021Inventor: Shoji Suzuki
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Publication number: 20210371327Abstract: A filamentation process uses ultrafast laser pulses to form a line of filaments or perforations in a glass material in sheet form. The glass material is then cleaved using mechanical or thermal stress to form a glass substrate with a planar doughnut shape having an inner circular edge and an outer circular edge. The inner and outer edges may exhibit filamentary damage from the filamentation process, including microcracks and pillar shaped funnels along an entire length of the edge. The inner and/or outer edges may then be treated by polishing only, by etching only, or by etching and polishing to remove a portion of the filamentary damage to improve the strength of the edges. The resulting glass substrate may be used in a magnetic medium for a magnetic recording device, wherein it provides an edge strength sufficient to withstand high force shocks to the device.Type: ApplicationFiled: June 1, 2020Publication date: December 2, 2021Inventors: Shoji Suzuki, Christopher David Brisko, Hsiung Hsiung Ng
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Publication number: 20210238024Abstract: A fluid pressure feeding device includes: a follower plate that is inserted into a tank, that applies a pressing force to a fluid, and that has an opening for pumping up the fluid from an inside of the tank; a pump having a primer plate configured to exhibit reciprocating movement to pump up the fluid in the tank into a pump internal space; and a position control unit configured to control a position of the primer plate within a range of the reciprocating movement. An outer shape of the primer plate substantially matches a shape of the opening of the follower plate, and the position control unit is configured such that the primer plate is positioned in the opening of the follower plate when the follower plate is taken out from the tank.Type: ApplicationFiled: December 30, 2020Publication date: August 5, 2021Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, PYLES JAPAN Co., LTD., TOYOTA PRODUCTION ENGINEERINGInventors: Masahiro TASAKA, Kunimi ABIRU, Shoji SUZUKI, Takatoshi URASHI, Katsura HARA, Tomohiro TOKUNAGA, Naoki YAMAGUCHI
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Publication number: 20210090601Abstract: A disk for a magnetic recording apparatus. The disk includes a substrate comprising a first surface and a second surface, wherein the substrate has a substrate thickness. The disk includes a first coating layer disposed over the first surface of the substrate, wherein the first coating layer has a first coating layer thickness. The disk includes a second coating layer disposed over the second surface of the substrate, wherein the second coating layer has a second coating layer thickness. The disk has a disk thickness, wherein the disk thickness includes the substrate thickness. The maximum thickness difference between the first coating layer thickness and the second coating layer thickness is a function of the square of the disk thickness.Type: ApplicationFiled: September 25, 2019Publication date: March 25, 2021Inventors: Shoji Suzuki, John Michael Bianchini
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Patent number: 9650247Abstract: A method for efficiently producing a high-purity metal hydride without contamination of other metals while initiating reaction rapidly is provided. A method for producing a metal hydride from a metal selected from the group consisting of Group 2 metals and Group 3 metals comprising: (A) charging the pressure resistant container with the metal, introducing hydrogen into the container, and heating the container to initiate reaction, wherein a gauge pressure (a) is set to 0.1 to 1.5 MPa, a heating temperature (b) is set to 50 to 250° C., and a product of the gauge pressure and the heating temperature, a×b, is set in the range of 20 to 100; (B) stopping the introduction of hydrogen to allow the reaction to proceed when the temperature in the reaction container is increased to a temperature higher by 10 to 100° C. than the heating temperature; (C) introducing hydrogen of 0.1 to 1.Type: GrantFiled: September 25, 2014Date of Patent: May 16, 2017Assignee: TAIHEIYO CEMENT CORPORATIONInventors: Tetsuya Ishimoto, Shoji Suzuki, Katsumi Matsui, Tomoki Hatsumori, Kazuhiko Tokoyoda
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Publication number: 20160244328Abstract: A method for efficiently producing a high-purity metal hydride without contamination of other metals while initiating reaction rapidly is provided. A method for producing a metal hydride from a metal selected from the group consisting of Group 2 metals and Group 3 metals comprising: (A) charging the pressure resistant container with the metal, introducing hydrogen into the container, and heating the container to initiate reaction, wherein a gauge pressure (a) is set to 0.1 to 1.5 MPa, a heating temperature (b) is set to 50 to 250° C., and a product of the gauge pressure and the heating temperature, a×b, is set in the range of 20 to 100; (B) stopping the introduction of hydrogen to allow the reaction to proceed when the temperature in the reaction container is increased to a temperature higher by 10 to 100° C. than the heating temperature; (C) introducing hydrogen of 0.1 to 1.Type: ApplicationFiled: September 25, 2014Publication date: August 25, 2016Applicant: TAIHEIYO CEMENT CORPORATIONInventors: Tetsuya ISHIMOTO, Shoji SUZUKI, Katsumi MATSUI, Tomoki HATSUMORI, Kazuhiko TOKOYODA
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Patent number: 9309120Abstract: There is provided a method for efficiently producing a high-purity alkali metal nitride or alkaline earth metal nitride by simple processes. Specifically provided is a method for producing an alkali metal nitride, an alkaline earth metal nitride, or a composite thereof, the method including thermally decomposing one or more alkali metal amides or alkaline earth metal amides.Type: GrantFiled: November 11, 2010Date of Patent: April 12, 2016Assignee: TAIHEIYO CEMENT CORPORATIONInventors: Shoji Suzuki, Kazuhiko Tokoyoda, Tsutomu Suzuki
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Patent number: 9302913Abstract: There is provided a method for producing a high-purity metal nitride by simple processes with good yield. Specifically provided is a method for producing a metal nitride including heating a metal hydride under a nitrogen gas or an ammonia gas.Type: GrantFiled: August 11, 2011Date of Patent: April 5, 2016Assignee: TAIHEIYO CEMENT CORPORATIONInventors: Kazuhiko Tokoyoda, Shoji Suzuki, Tomoki Hatsumori
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Patent number: 9189485Abstract: A predicted-failure-evidence diagnosing section for equipment that does not depend on the equipment and does not require knowledge of the equipment is provided. On the basis of a result of a predicted-abnormality-evidence diagnosis carried out by this section on time-series data gathered from the equipment, an allowable error used for compressing the gathered data can be set and managed in order to compress the data if the result of the diagnosis is normal or to restrict the compression of the data during a period in which an evidence of a predicted abnormality is detected. Thus, the amount of data stored in a memory can be reduced.Type: GrantFiled: April 26, 2010Date of Patent: November 17, 2015Assignee: HITACHI, LTD.Inventors: Shoji Suzuki, Junsuke Fujiwara, Hideaki Suzuki
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Patent number: 8834962Abstract: Methods for improving the strength of glass substrates are described. One such method for strengthening a glass disk substrate for a storage device includes immersing at least a portion of the glass substrate in a solution, the solution including a solvent and a coating material selected from the group consisting of NaOH, KOH, and KNO3, removing the glass substrate from the solution, allowing the solvent to evaporate from the glass substrate, and heating the glass substrate at a preselected temperature for a preselected duration, where the preselected temperature is sufficient to substantially melt the coating material and is less than a transition temperature of the glass substrate.Type: GrantFiled: June 3, 2011Date of Patent: September 16, 2014Assignee: WD Media, LLCInventors: Shoji Suzuki, Chris Brisko