Patents by Inventor Hiroaki Nemoto
Hiroaki Nemoto 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).
-
Patent number: 11024334Abstract: A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer that are arranged in this order. The magnetic layer has a granular structure including magnetic grains having a L10 crystal structure, and grain boundary parts having a volume fraction in a range of 25 volume % to 50 volume %. The magnetic grains have a c-axis orientation with respect to the substrate. The grain boundary parts include a material having a lattice constant in a range of 0.30 nm to 0.36 nm, or in a range of 0.60 nm to 0.72 nm.Type: GrantFiled: March 31, 2020Date of Patent: June 1, 2021Assignee: SHOWA DENKO K.K.Inventors: Takayuki Fukushima, Chen Xu, Lei Zhang, Hisato Shibata, Takehiro Yamaguchi, Kazuya Niwa, Tomoo Shige, Hiroaki Nemoto, Yuji Umemoto, Hiroshi Koyanagi
-
Publication number: 20200357436Abstract: A magnetic recording medium includes a substrate, an underlayer formed on the substrate, and a magnetic layer formed on the underlayer. The magnetic layer includes an alloy having a L10 structure. The underlayer includes a first underlayer and a second underlayer. The first underlayer includes Mo and Ru, the content of Ru in the first underlayer is in a range of 5 atom % to 30 atom %, and the second underlayer includes a material having a body-centered cubic (BCC) structure. The second underlayer is formed between the first underlayer and the substrate.Type: ApplicationFiled: April 30, 2020Publication date: November 12, 2020Inventors: Chen XU, Lei ZHANG, Takayuki FUKUSHIMA, Hisato SHIBATA, Takehiro YAMAGUCHI, Kazuya NIWA, Tomoo SHIGE, Hiroaki NEMOTO, Yuji UMEMOTO, Hiroshi KOYANAGI
-
Publication number: 20200327905Abstract: A magnetic recording medium includes a substrate, an underlayer, and a magnetic layer that are arranged in this order. The magnetic layer has a granular structure including magnetic grains having a L10 crystal structure, and grain boundary parts having a volume fraction in a range of 25 volume % to 50 volume %. The magnetic grains have a c-axis orientation with respect to the substrate. The grain boundary parts include a material having a lattice constant in a range of 0.30 nm to 0.36 nm, or in a range of 0.60 nm to 0.72 nm.Type: ApplicationFiled: March 31, 2020Publication date: October 15, 2020Inventors: Takayuki FUKUSHIMA, Chen XU, Lei ZHANG, Hisato SHIBATA, Takehiro YAMAGUCHI, Kazuya NIWA, Tomoo SHIGE, Hiroaki NEMOTO, Yuji UMEMOTO, Hiroshi KOYANAGI
-
Patent number: 10027921Abstract: A display device includes a panel module including a display cell; a front side exterior panel and a rear side exterior panel which sandwich the panel module therebetween from back and front; a driving circuit which drives the display cell; and a stand which is separately provided from the rear side exterior panel, includes a speaker box inside which a first speaker is built-in, and is located on a lower rear side of the rear side exterior panel when placing the panel module.Type: GrantFiled: February 4, 2015Date of Patent: July 17, 2018Assignee: SONY CORPORATIONInventors: Takeshi Yamamoto, Katsuyuki Nikaido, Hiroaki Nemoto, Yusuke Mori, Masahiro Takahashi
-
Patent number: 9841143Abstract: A suction method that sucks inside of a filling nozzle used for supply of hydrogen by using a suction nozzle that is engaged with the filling nozzle, the suction method comprising: evacuating a vacuum chamber by using a vacuum pump; and sucking inside of the suction nozzle by using the evacuated vacuum chamber.Type: GrantFiled: July 1, 2015Date of Patent: December 12, 2017Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, IWATANI CORPORATIONInventors: Yoshihiro Hori, Yuu Matsuno, Hiroaki Nemoto, Hideyo Omori, Toshiyuki Kondo
-
Patent number: 9406327Abstract: In one embodiment, a magnetic storage device includes at least one microwave assisted magnetic recording (MAMR) head, each MAMR head including a spin torque oscillator (STO), a magnetic recording medium, a drive mechanism for passing the magnetic medium over the at least one MAMR head, and a controller electrically coupled to the at least one MAMR head for controlling operation of the at least one MAMR head, wherein the magnetic recording medium includes a recording layer positioned directly or indirectly above a substrate and an assist layer positioned above the recording layer, wherein the recording layer includes at least Co, Pt, and an oxide or oxygen, wherein the assist layer is positioned closer to the at least one MAMR head and includes at least Co and Pt, and wherein at least a portion of the recording layer has a smaller anisotropic magnetic field than the assist layer.Type: GrantFiled: August 30, 2013Date of Patent: August 2, 2016Assignee: HGST Netherlands B.V.Inventors: Tatsuya Hinoue, Ichiro Tamai, Hiroaki Nemoto
-
Publication number: 20160125903Abstract: In one embodiment, a perpendicular magnetic recording medium includes a substrate; a soft magnetic underlayer positioned above the substrate; a seed layer structure positioned above the soft magnetic underlayer, the seed layer structure including a first seed layer and a second seed layer positioned above the first seed layer; an interlayer structure positioned above the seed layer structure, the interlayer structure including a first interlayer, a second interlayer positioned above the first interlayer, and a third interlayer positioned above the second interlayer; and a magnetic recording layer positioned above the interlayer structure, where the second seed layer includes a Ni alloy including at least one oxide, and where the first interlayer includes a Ru alloy.Type: ApplicationFiled: October 31, 2014Publication date: May 5, 2016Applicant: HGST NETHERLANDS B.V.Inventors: Ichiro Tamai, Tatsuya Hinoue, Shun Tonooka, Hiroaki Nemoto
-
Publication number: 20160010798Abstract: A suction method that sucks inside of a filling nozzle used for supply of hydrogen by using a suction nozzle that is engaged with the filling nozzle, the suction method comprising: evacuating a vacuum chamber by using a vacuum pump; and sucking inside of the suction nozzle by using the evacuated vacuum chamber.Type: ApplicationFiled: July 1, 2015Publication date: January 14, 2016Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, IWATANI CORPORATIONInventors: Yoshihiro HORI, Yuu MATSUNO, Hiroaki NEMOTO, Hideyo OMORI, Toshiyuki KONDO
-
Patent number: 9182674Abstract: An immersion upper layer film composition includes a resin and a solvent. The resin forms a water-stable film during irradiation and is dissolved in a subsequent developer. The solvent contains a monovalent alcohol having 6 or less carbon atoms. The composition is to be applied to form a coat on a photoresist film in an immersion exposure process in which the photoresist film is irradiated through water provided between a lens and the photoresist film.Type: GrantFiled: July 17, 2012Date of Patent: November 10, 2015Assignee: JSR CORPORATIONInventors: Toru Kimura, Yukio Nishimura, Tomohiro Utaka, Hiroaki Nemoto, Atsushi Nakamura, Takashi Chiba, Hiroki Nakagawa
-
Patent number: 9117477Abstract: A magnetic medium for perpendicular magnetic data recording, having improved magnetic properties through use of a novel seed layer. The magnetic medium includes a substrate having a seed layer, a magnetic under-layer and a magnetic recording layer formed there-over. The seed layer includes an element selected from a first group of Cr, Co, Fe and Ni, and at least one element that is selected from the other elements of the first group or from a second group consisting of W, Mo and Ru. A buffer layer may be included between the substrate and the seed layer.Type: GrantFiled: May 8, 2013Date of Patent: August 25, 2015Assignee: HGST Netherlands B.V.Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroaki Nemoto
-
Publication number: 20150230358Abstract: A display device includes a panel module including a display cell; a front side exterior panel and a rear side exterior panel which sandwich the panel module therebetween from back and front; a driving circuit which drives the display cell; and a stand which is separately provided from the rear side exterior panel, includes a speaker box inside which a first speaker is built-in, and is located on a lower rear side of the rear side exterior panel when placing the panel module.Type: ApplicationFiled: February 4, 2015Publication date: August 13, 2015Inventors: TAKESHI YAMAMOTO, KATSUYUKI NIKAIDO, HIROAKI NEMOTO, YUSUKE MORI, MASAHIRO TAKAHASHI
-
Patent number: 9099140Abstract: In order to provide a thermal energy assisted medium capable of improving anti-sliding reliability over long periods of time in low flying head conditions, while also maintaining a high SNR, a unique medium is proposed. A soft magnetic layer is formed on a substrate, a soft magnetic layer is formed thereon via a non-magnetic intermediate layer, and an intermediate layer, a crystal oriented control intermediate layer, an artificial lattice intermediate layer having an artificial lattice film in which a first layer comprising Co and a second layer comprising Pt and Pd are laminated repeatedly to form a recording layer, and a cap layer and an lubricating layer are formed. The concentration of Pd comprising the second layer is from about 20 atomic % to about 40 atomic %. Other mediums and systems are also described.Type: GrantFiled: December 3, 2009Date of Patent: August 4, 2015Assignee: HGST Netherlands B.V.Inventors: Hiroaki Nemoto, Hiroyuki Nakagawa, Takayuki Ichihara, Masae Suzuki
-
Publication number: 20150085401Abstract: An HDD includes a magnetic head, and a magnetic recording medium. The recording medium includes a recording magnetic layer, and a recording assist magnetic layer, the recording assist magnetic layer generates a high-frequency magnetic field by means of a recording field from the magnetic head, and a recording assist action acts on the recording magnetic layer.Type: ApplicationFiled: September 26, 2013Publication date: March 26, 2015Applicant: HGST Netherlands B.V.Inventors: Hiroaki Nemoto, Ichiro Tamai, Tatsuya Hinoue, Yuzuru Hosoe
-
Publication number: 20150062745Abstract: In one embodiment, a magnetic storage device includes at least one microwave assisted magnetic recording (MAMR) head, each MAMR head including a spin torque oscillator (STO), a magnetic recording medium, a drive mechanism for passing the magnetic medium over the at least one MAMR head, and a controller electrically coupled to the at least one MAMR head for controlling operation of the at least one MAMR head, wherein the magnetic recording medium includes a recording layer positioned directly or indirectly above a substrate and an assist layer positioned above the recording layer, wherein the recording layer includes at least Co, Pt, and an oxide or oxygen, wherein the assist layer is positioned closer to the at least one MAMR head and includes at least Co and Pt, and wherein at least a portion of the recording layer has a smaller anisotropic magnetic field than the assist layer.Type: ApplicationFiled: August 30, 2013Publication date: March 5, 2015Applicant: HGST Netherlands B.V.Inventors: Tatsuya Hinoue, Ichiro Tamai, Hiroaki Nemoto
-
Publication number: 20140334039Abstract: A magnetic medium for perpendicular magnetic data recording, having improved magnetic properties through use of a novel seed layer. The magnetic medium includes a substrate having a seed layer, a magnetic under-layer and a magnetic recording layer formed there-over. The seed layer includes an element selected from a first group of Cr, Co, Fe and Ni, and at least one element that is selected from the other elements of the first group or from a second group consisting of W, Mo and Ru. A buffer layer may be included between the substrate and the seed layer.Type: ApplicationFiled: May 8, 2013Publication date: November 13, 2014Applicant: HGST Netherlands B.V.Inventors: Akemi Hirotsune, Ikuko Takekuma, Hiroaki Nemoto
-
Patent number: 8771849Abstract: Embodiments of the present invention help allow accurate control of the magnetization reversal in a magnetic recording layer in small reversal units, whereby high-density recording can be achieved. According to one embodiment, by forming an intermediate layer having a granular structure similar to that of the magnetic recording layer below the magnetic recording layer, a continuous crystal grain boundary is formed at the interface between the magnetic recording layer and the intermediate layer, thereby preventing incomplete formation of the crystal grain boundary found in the initial growth layer of the magnetic recording layer. The intermediate layer comprises a non-magnetic alloy comprising Co and Cr as its main components and an oxide such as Al, Cr, Hf. Mg, Nb, Si, Ta, Ti and Zr. Further, the average content of the oxygen element in the intermediate layer is in the range from 6 at % to 20 at %.Type: GrantFiled: October 21, 2008Date of Patent: July 8, 2014Assignee: HGST Netherlands B.V.Inventors: Hiroaki Nemoto, Ikuko Takekuma, Ichiro Tamai, Yoshiyuki Hirayama
-
Patent number: 8709618Abstract: According to embodiments of the present invention, a shielded pole writer and a perpendicular magnetic recording medium suitable thereto are combined to provide high medium SNR and excellent OW characteristic simultaneously. A perpendicular magnetic recording medium of a magnetic storage apparatus mounting a shielded pole writer, including a perpendicular magnetic recording medium having a recording layer of a three layered structure is used. A first recording layer has a granular structure consisting of grain boundaries containing an oxide and columnar grains comprising a CoCrPt alloy, in which a second recording layer and a third recording layer formed thereabove comprise Co as a main ingredient, contain Cr and do not contain an oxide, and the Cr concentration in the second recording layer is lower than the Cr concentration in the third recording layer.Type: GrantFiled: March 20, 2007Date of Patent: April 29, 2014Assignee: HGST Netherlands B.V.Inventors: Ikuko Takekuma, Hiroyuki Nakagawa, Hiroaki Nemoto, Yoshiyuki Hirayama
-
Patent number: 8679654Abstract: Surface flatness of magnetic recording medium to which a magnetic recording layer made of L10 FePt magnetic alloy thin film, with distance between a magnetic head and a magnetic recording medium sufficiently reduced. The magnetic recording layer includes: magnetic layers containing a magnetic alloy including Fe and Pt as principal materials; and one non-magnetic material selected from carbon, oxide and nitride. The first magnetic layer disposed closer to a substrate has a granular structure in which magnetic alloy grains including FePt alloy as the principal material are separated from grain boundaries including the non-magnetic material as the principal material. The second magnetic layer disposed closer to the surface than the first magnetic layer is fabricated so as to have a homogeneous structure in which an FePt alloy and the non-magnetic material are mixed in a state finer than diameters of the FePt magnetic alloy grains in the first magnetic layer.Type: GrantFiled: February 13, 2012Date of Patent: March 25, 2014Assignee: Hitachi, Ltd.Inventors: Hiroaki Nemoto, Ikuko Takekuma, Kimio Nakamura, Junichi Sayama
-
Publication number: 20120282553Abstract: An immersion upper layer film composition includes a resin and a solvent. The resin forms a water-stable film during irradiation and is dissolved in a subsequent developer. The solvent contains a monovalent alcohol having 6 or less carbon atoms. The composition is to be applied to form a coat on a photoresist film in an immersion exposure process in which the photoresist film is irradiated through water provided between a lens and the photoresist film.Type: ApplicationFiled: July 17, 2012Publication date: November 8, 2012Applicant: JSR CorporationInventors: Toru KIMURA, Yukio NISHIMURA, Tomohiro UTAKA, Hiroaki NEMOTO, Atsushi NAKAMURA, Takashi CHIBA, Hiroki NAKAGAWA
-
Patent number: 8298688Abstract: According to one embodiment, a magnetic recording medium includes a magnetic recording layer formed above a substrate, comprising: a first magnetic layer formed from a [Co/Pt]n multilayered film, wherein the first magnetic layer has a face-centered cubic (fcc) (111) crystal structure, the (111) direction being perpendicular to a film surface thereof, and a second magnetic layer comprising a CoCrPt or CoCrPt alloy film formed above the first magnetic layer, wherein the second magnetic layer has a hexagonal close packed (hcp) (00.1) crystal structure, the (00.1) direction being perpendicular to a film surface thereof. According to another embodiment, a system includes a magnetic recording medium as described above, a magnetic head for reading from and/or writing to the magnetic recording medium, a magnetic head slider for supporting the magnetic head, and a control unit coupled to the magnetic head for controlling operation of the magnetic head.Type: GrantFiled: November 2, 2010Date of Patent: October 30, 2012Assignee: Hitachi Global Storage Technologies Netherlands B.V.Inventors: Hiroaki Nemoto, Kiwamu Tanahashi, Hiroyuki Nakagawa