Patents by Inventor Hiroyuki Hieda
Hiroyuki Hieda 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: 9269387Abstract: In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and third directions; and a boundary magnetic part having a plurality of first magnetic portions arrayed in a line in the third direction and each having a length longer than that of the first magnetic dot in the third direction, and a second magnetic dot disposed between the first magnetic portions and disposed on extensions in the first and second directions of the first magnetic dots, and disposed along with the data area on the substrate.Type: GrantFiled: December 18, 2014Date of Patent: February 23, 2016Assignee: Kabushiki Kaisha ToshibaInventors: Akira Kikitsu, Naoko Kihara, Yoshiyuki Kamata, Hiroyuki Hieda
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Patent number: 9053733Abstract: According to one embodiment, a magnetic recording medium includes a data region and a servo region adjacent to the data region and including a magnetic recording layer, the magnetic recording layer including first and second patterned regions adjacent to each other, the first patterned region including a first nonmagnetic matrix and first magnetic particles dispersed in the first nonmagnetic matrix and having magnetization oriented in a first direction, the second patterned region includes a second nonmagnetic matrix and second magnetic particles dispersed in the second nonmagnetic matrix and having magnetization oriented in a second direction opposite to the first direction, sizes of the first magnetic particles being smaller than sizes of the second magnetic particles.Type: GrantFiled: April 15, 2013Date of Patent: June 9, 2015Assignee: Kabushiki Kaisha ToshibaInventor: Hiroyuki Hieda
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Publication number: 20150102008Abstract: In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and third directions; and a boundary magnetic part having a plurality of first magnetic portions arrayed in a line in the third direction and each having a length longer than that of the first magnetic dot in the third direction, and a second magnetic dot disposed between the first magnetic portions and disposed on extensions in the first and second directions of the first magnetic dots, and disposed along with the data area on the substrate.Type: ApplicationFiled: December 18, 2014Publication date: April 16, 2015Inventors: Akira KIKITSU, Naoko KIHARA, Yoshiyuki KAMATA, Hiroyuki HIEDA
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Patent number: 8974682Abstract: A self-assembled pattern forming method in an embodiment includes: forming a guide pattern on a substrate; forming a layer of a first polymer; filling a first block copolymer; and phase-separating the first block copolymer. The guide pattern includes a first recessed part having a depth T and a diameter D smaller than the depth T, and a second recessed part having a width larger than double of the diameter D. The first block copolymer has the first polymer and a second polymer which are substantially the same in volume fraction. By phase-separating the first block copolymer, a cylinder structure and a lamellar structure are obtained.Type: GrantFiled: June 28, 2013Date of Patent: March 10, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Hieda, Yoshiyuki Kamata, Naoko Kihara, Akira Kikitsu, Ryosuke Yamamoto
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Patent number: 8958177Abstract: In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and third directions; and a boundary magnetic part having a plurality of first magnetic portions arrayed in a line in the third direction and each having a length longer than that of the first magnetic dot in the third direction, and a second magnetic dot disposed between the first magnetic portions and disposed on extensions in the first and second directions of the first magnetic dots, and disposed along with the data area on the substrate.Type: GrantFiled: June 7, 2013Date of Patent: February 17, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Akira Kikitsu, Naoko Kihara, Yoshiyuki Kamata, Hiroyuki Hieda
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Patent number: 8956560Abstract: In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble.Type: GrantFiled: March 19, 2012Date of Patent: February 17, 2015Assignee: Kabushiki Kaisha ToshibaInventors: Yasuaki Ootera, Yoshiyuki Kamata, Naoko Kihara, Yoshiaki Kawamonzen, Takeshi Okino, Ryosuke Yamamoto, Tomoyuki Maeda, Norikatsu Sasao, Akiko Yuzawa, Takuya Shimada, Hiroyuki Hieda
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Patent number: 8916053Abstract: A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate.Type: GrantFiled: June 20, 2012Date of Patent: December 23, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Yoshiaki Kawamonzen, Yasuaki Ootera, Akiko Yuzawa, Naoko Kihara, Yoshiyuki Kamata, Hiroyuki Hieda, Norikatsu Sasao, Ryosuke Yamamoto, Takeshi Okino, Tomoyuki Maeda, Takuya Shimada
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Patent number: 8865010Abstract: In one embodiment, a pattern forming method includes: forming a functional layer having a functional group to cross-link a first polymer on a substrate; forming a diblock copolymer layer having the first polymer and a second polymer on the functional layer; self-assembling the diblock copolymer layer to form a self-assembled layer, the self-assembled layer having a first domain corresponding to the first polymer, and a plurality of second domains corresponding to the second polymer and surrounded by or interposed in the first domain; cross-linking the first polymer in the self-assembled layer with the functional group in the functional layer to form a bonding layer disposed in the self-assembled layer and bonded to the functional layer; and washing or etching the self-assembled layer to remain the bonding layer.Type: GrantFiled: January 25, 2013Date of Patent: October 21, 2014Assignee: Kabushiki Kaisha ToshibaInventors: Naoko Kihara, Hiroyuki Hieda, Akiko Yuzawa, Norikatsu Sasao, Ryosuke Yamamoto, Yoshiyuki Kamata
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Publication number: 20140106065Abstract: A method for manufacturing a patterned medium of an embodiment includes forming a perpendicular magnetic recording layer on a substrate, forming a mask on the perpendicular magnetic recording layer, milling the perpendicular magnetic recording layer, and depositing a protective layer on the perpendicular magnetic recording layer. The perpendicular magnetic recording layer includes a first element selected from Fe and Co and a second element selected from Pt and Pd, and has a hard magnetic alloy material having an L10 or L11 structure. A temperature of the substrate during the milling is higher than or equal to 250° C. and lower than or equal to 500° C.Type: ApplicationFiled: June 28, 2013Publication date: April 17, 2014Inventors: Tomoyuki MAEDA, Hiroyuki HIEDA, Masahiro KANAMARU, Katsuya SUGAWARA
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Publication number: 20140097152Abstract: A self-assembled pattern forming method in an embodiment includes: forming a guide pattern on a substrate; forming a layer of a first polymer; filling a first block copolymer; and phase-separating the first block copolymer. The guide pattern includes a first recessed part having a depth T and a diameter D smaller than the depth T, and a second recessed part having a width larger than double of the diameter D. The first block copolymer has the first polymer and a second polymer which are substantially the same in volume fraction. By phase-separating the first block copolymer, a cylinder structure and a lamellar structure are obtained.Type: ApplicationFiled: June 28, 2013Publication date: April 10, 2014Inventors: Hiroyuki HIEDA, Yoshiyuki KAMATA, Naoko KIHARA, Akira KIKITSU, Ryosuke YAMAMOTO
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Publication number: 20140030554Abstract: In one embodiment, there are provided: a substrate; a data area disposed on the substrate and having a plurality of first magnetic dots arrayed in lines in mutually different first, second, and third directions; and a boundary magnetic part having a plurality of first magnetic portions arrayed in a line in the third direction and each having a length longer than that of the first magnetic dot in the third direction, and a second magnetic dot disposed between the first magnetic portions and disposed on extensions in the first and second directions of the first magnetic dots, and disposed along with the data area on the substrate.Type: ApplicationFiled: June 7, 2013Publication date: January 30, 2014Inventors: Akira KIKITSU, Naoko KIHARA, Yoshiyuki KAMATA, Hiroyuki HIEDA
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Publication number: 20130258523Abstract: A magnetic recording medium of an embodiment includes: a substrate; a nonmagnetic base layer disposed on the substrate; a perpendicular magnetic recording layer disposed on the nonmagnetic base layer, having a hard magnetic recording layer, a nonmagnetic intermediate layer, and a soft magnetic recording layer, and divided into mutually separated plural regions; and a protective layer disposed on the perpendicular magnetic recording layer. The hard magnetic recording layer has an easy magnetization axis directed to a stack direction of the hard magnetic recording layer. The nonmagnetic intermediate layer contains one of C, ZnO, a carbide of Si, Ti, Ta or W, and a nitride of Si, Ti, Ta or W.Type: ApplicationFiled: December 21, 2012Publication date: October 3, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Tomoyuki MAEDA, Hiroyuki HIEDA, Yousuke ISOWAKI, Takuya SHIMADA
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Publication number: 20130256263Abstract: In one embodiment, a pattern forming method includes: forming a functional layer having a functional group to cross-link a first polymer on a substrate; forming a diblock copolymer layer having the first polymer and a second polymer on the functional layer; self-assembling the diblock copolymer layer to form a self-assembled layer, the self-assembled layer having a first domain corresponding to the first polymer, and a plurality of second domains corresponding to the second polymer and surrounded by or interposed in the first domain; cross-linking the first polymer in the self-assembled layer with the functional group in the functional layer to form a bonding layer disposed in the self-assembled layer and bonded to the functional layer; and washing or etching the self-assembled layer to remain the bonding layer.Type: ApplicationFiled: January 25, 2013Publication date: October 3, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Naoko KIHARA, Hiroyuki Hieda, Akiko Yuzawa, Norikatsu Sasao, Ryosuke Yamamoto, Yoshiyuki Kamata
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Publication number: 20130230742Abstract: According to one embodiment, a magnetic recording medium includes a data region and a servo region adjacent to the data region and including a magnetic recording layer, the magnetic recording layer including first and second patterned regions adjacent to each other, the first patterned region including a first nonmagnetic matrix and first magnetic particles dispersed in the first nonmagnetic matrix and having magnetization oriented in a first direction, the second patterned region includes a second nonmagnetic matrix and second magnetic particles dispersed in the second nonmagnetic matrix and having magnetization oriented in a second direction opposite to the first direction, sizes of the first magnetic particles being smaller than sizes of the second magnetic particles.Type: ApplicationFiled: April 15, 2013Publication date: September 5, 2013Applicant: Kabushiki Kaisha ToshibaInventor: Hiroyuki HIEDA
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Patent number: 8428927Abstract: A simulation method includes obtaining an execution log generated while a predetermined processing is executed by simulating a series of operations in a test model that is a modeled version of a test target device by causing a predetermined processing to be executed in the test model, extracting a processing unit log constituted by a predetermined processing unit from the execution log obtained in the obtaining, and simulating an operation in which processing corresponding to the processing unit log extracted in the extracting is executed in a test model in which a part of function of the test target device is modified, the operation being simulated on the basis of a setting condition set by a user.Type: GrantFiled: April 13, 2010Date of Patent: April 23, 2013Assignee: Fujitsu LimitedInventors: Noriyasu Nakayama, Nobukazu Koizumi, Tomoki Kato, Naoki Yuzawa, Hiroyuki Hieda, Satoshi Hiramoto
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Publication number: 20130075361Abstract: A pattern forming method according to an embodiment includes: forming a pattern film on a first substrate, the pattern film having a concave-convex pattern, the pattern film being made of a material containing a first to-be-imprinted agent; forming a material film on a second substrate, the material film containing a second to-be-imprinted agent having a higher etching rate than an etching rate of the first to-be-imprinted agent; transferring the concave-convex pattern of the pattern film onto the material film by applying pressure between the first substrate and the second substrate, with the pattern film being positioned to face the material film, and by curing the second to-be-imprinted agent; detaching the first substrate from the pattern film; and removing the material film by etching, to leave the pattern film on the second substrate.Type: ApplicationFiled: June 20, 2012Publication date: March 28, 2013Applicant: KABUSHIKI KAISHA TOSHIBAInventors: Yoshiaki KAWAMONZEN, Yasuaki OOTERA, Akiko YUZAWA, Naoko KIHARA, Yoshiyuki KAMATA, Hiroyuki HIEDA, Norikatsu SASAO, Ryosuke YAMAMOTO, Takeshi OKINO, Tomoyuki MAEDA, Takuya SHIMADA
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Publication number: 20130069272Abstract: In one embodiment, a method of manufacturing a mold includes: forming a first layer having an affinity to a second polymer on a substrate having an affinity to a first polymer; forming first and second openings in the first layer; filling a resist in the second openings and hardening the resist to obtain a hardened resist; and forming a second layer containing a block copolymer and causing it to self-assemble.Type: ApplicationFiled: March 19, 2012Publication date: March 21, 2013Inventors: Yasuaki OOTERA, Yoshiyuki KAMATA, Naoko KIHARA, Yoshiaki KAWAMONZEN, Takeshi OKINO, Ryosuke YAMAMOTO, Tomoyuki MAEDA, Norikatsu SASAO, Akiko YUZAWA, Takuya SHIMADA, Hiroyuki Hieda
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Patent number: 8298690Abstract: A magnetic recording medium includes a disk substrate, and recording cells arrayed on the disk substrate in a track direction, the recording cells includes a ferromagnetic pattern and a magnetic pattern formed on one of two sidewalls of the ferromagnetic pattern in the track direction and having a lower crystalline magnetic anisotropy constant Ku than that of the ferromagnetic pattern.Type: GrantFiled: November 20, 2008Date of Patent: October 30, 2012Assignee: Kabushiki Kaisha ToshibaInventors: Hiroyuki Hieda, Kazuto Kashiwagi, Akira Kikitsu, Yousuke Isowaki, Yoshiyuki Kamata
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Patent number: 8249850Abstract: The present invention relates to a technique for executing performance evaluation simulation of a system to be implemented by software or hardware. A simulation apparatus includes a first acquisition section for executing existing tentative software to acquire a first execution log, a division section for dividing the first execution log into a plurality of basic processing units, a basic processing execution log production section for modifying some of the plural basic processing units to produce a basic processing execution log to be used for simulation, and a simulation execution section for inputting the basic processing execution log to a hardware model to execute the simulation to acquire information required for the performance evaluation.Type: GrantFiled: February 26, 2009Date of Patent: August 21, 2012Assignee: Fujitsu LimitedInventors: Tomoki Kato, Noriyasu Nakayama, Hiroyuki Hieda
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Patent number: 8214189Abstract: A performance evaluation simulation apparatus divides a process into basic process units based on an execution log, calculates a throughput of each basic process unit from information held in the execution log, changes an arrangement structure so that a basic process unit with the calculated throughput exceeding a predetermined threshold is disposed in a hardware model, and performs a performance evaluation simulation on the hardware model and a software model to generate statistical information on which performance evaluation is based.Type: GrantFiled: December 8, 2008Date of Patent: July 3, 2012Assignee: Fujitsu LimitedInventors: Tomoki Kato, Nobukazu Koizumi, Noriyasu Nakayama, Naoki Yuzawa, Hiroyuki Hieda, Satoshi Hiramoto