Patents by Inventor Yukiko Oshikubo
Yukiko Oshikubo 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: 20230044252Abstract: A package with built-in electronic components that is to be soldered to an electronic circuit board includes: an insulating layer; an electronic component provided on one surface of the insulating layer; and a pad which is electrically connected to the electronic component and in which a plurality of openings that extend from a first surface of the pad in contact with a solder bump to the insulating layer are formed, wherein an area of the plurality of openings at the first surface is larger than an area of the plurality of openings at a second surface of the pad, which is an opposite surface to the first surface and is in contact with the insulating layer.Type: ApplicationFiled: April 22, 2022Publication date: February 9, 2023Applicant: FUJITSU LIMITEDInventors: Yukiko Oshikubo, Yoshihiro Nakata
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Publication number: 20210013178Abstract: An electronic module includes: a plurality of heat generating members provided over a first surface of a board; a frame joined to the first surface of the board and provided between the plurality of heat generating members that are arranged; and a lid configured to cover the first surface of the board and thermally coupled to each of the plurality of heat generating members, the frame being a grid-shaped frame or a mesh-shaped frame.Type: ApplicationFiled: July 8, 2020Publication date: January 14, 2021Applicant: FUJITSU LIMITEDInventors: TERU NAKANISHI, Daijiro Ishibashi, Shinya Sasaki, Yukiko Oshikubo, Yoshihiro NAKATA
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Patent number: 8018683Abstract: A head slider that can furnish excellent head flying stability and a magnetic recording device having excellent head flying stability are provided. For the head slider, the protective layer is composed of two layers, that is, a lower layer and an upper layer thereon; the ionization potential of the lower layer is made to be smaller than that of the upper layer; and the surface free energy of the upper layer is made to be 45 mN/m or less.Type: GrantFiled: November 21, 2007Date of Patent: September 13, 2011Assignee: Fujitsu LimitedInventors: Norikazu Nakamura, Hiroshi Chiba, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Tsukasa Itani
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Publication number: 20100003422Abstract: A deposition apparatus includes a plasma generating unit that generates an arc discharge between a target and an anode to generate plasma; a deposition chamber in which a base is disposed; and a plasma transfer unit that transfers the plasma to the deposition chamber, wherein at least part of the plasma transfer unit is electrically separated from the plasma generating unit and the deposition chamber, and a negative voltage is applied to at least part of the plasma transfer unit.Type: ApplicationFiled: June 8, 2009Publication date: January 7, 2010Applicant: FUJITSU LIMITEDInventors: Norikazu NAKAMURA, Shoichi MIYAHARA, Yukiko OSHIKUBO, Hiroshi CHIBA
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Patent number: 7534750Abstract: There are provided a composition that exhibits sufficient flowability and also displays high substrate adhesion, and a magnetic recording medium, a head slider and a magnetic recording device that use this composition as a lubricant and are thus not prone to faults. The composition comprises a fluorine-containing polyether represented by formula (1), (in formula (1), p and q represent, independently of the symbols in other formulae, any chosen integers). The composition can be produced by reacting a polymer represented by formula (2) with glycidol, HOCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2OH??(2) (in formula (2), p and q represent, independently of the symbols in other formulae, any chosen integers).Type: GrantFiled: February 24, 2005Date of Patent: May 19, 2009Assignee: Fujitsu LimitedInventors: Hiroshi Chiba, Yukiko Oshikubo, Keiji Watanabe, Eishin Yamakawa, Takeshi Toukairin
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Patent number: 7514163Abstract: A magnetic recording medium having excellent durability and corrosion resistance as well as a magnetic recording device equipped with the magnetic recording medium is provided. The protective layer of the magnetic recording medium is composed of two layers, that is, a lower layer contacting with the magnetic layer and an upper layer on the lower layer. The internal stress of the lower layer is made smaller than that of the upper layer, and the surface free energy of the lower layer is made smaller than that of the upper layer.Type: GrantFiled: November 4, 2004Date of Patent: April 7, 2009Assignee: Fujitsu LimitedInventors: Norikazu Nakamura, Tsukasa Itani, Yukiko Oshikubo, Shinichi Nakayama, Takashi Toyoguchi
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Publication number: 20080259497Abstract: A magnetic recording medium and head slider that can furnish excellent head flying stability, a magnetic recording device having excellent head flying stability, and a method for manufacturing, in a short time, a magnetic recording medium and head slider that can furnish such excellent head flying stability, are provided. For both of the magnetic recording medium and head slider, the protective layers are each composed of two layers, that is, a lower layer and an upper layer thereon; the ionization potential of the lower layer is made to be smaller than that of the upper layer; and the surface free energy of the upper layer is made to be 45 mN/m or less.Type: ApplicationFiled: November 21, 2007Publication date: October 23, 2008Applicant: Fujitsu LimitedInventors: Norikazu Nakamura, Hiroshi Chiba, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Tsukasa Itani
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Patent number: 7317594Abstract: A magnetic recording medium and head slider that can furnish excellent head flying stability, a magnetic recording device having excellent head flying stability, and a method for manufacturing, in a short time, a magnetic recording medium and head slider that can furnish such excellent head flying stability, are provided. For both of the magnetic recording medium and head slider, the protective layers are each composed of two layers, that is, a lower layer and an upper layer thereon; the ionization potential of the lower layer is made to be smaller than that of the upper layer; and the surface free energy of the upper layer is made to be 45 mN/m or less.Type: GrantFiled: January 31, 2005Date of Patent: January 8, 2008Assignee: Fujitsu LimitedInventors: Norikazu Nakamura, Hiroshi Chiba, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Tsukasa Itani
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Publication number: 20070203037Abstract: A lubricant is provided that achieves a sufficiently small one-molecule-layer film thickness even when it has a high molecular weight, and has an increased reliability in a wide temperature range environment without losing the flying stability, by making the film thickness of a lubricant layer very small when it is used for the magnetic recording medium lubricant layer and/or head slider lubricant layer of a magnetic recording device. This lubricant comprises a fluorine-containing polymer, the lubricant having a relationship: Y<?1.4475X+2.815, wherein Y is a natural logarithm of diffusion coefficient at 23° C. (unit:?m2/s); and X is a viscosity at 20° C. (unit: Pas), or it comprises a fluorine-containing polymer having a particular structure, and with molecular chains between adjacent polar groups that have a number-average molecular weight of not less than 500.Type: ApplicationFiled: July 31, 2006Publication date: August 30, 2007Applicant: FUJITSU LIMITEDInventors: Hiroshi Chiba, Masaaki Sasa, Yukiko Oshikubo, Keiji Watanabe, Eishin Yamakawa, Takeshi Tokairin
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Patent number: 7259937Abstract: A head slider to which little amount of contaminants is adhered, that can form a uniform and flat head lubricant layer surface and that has excellent ultra-low floating properties, as well as a magnetic recording device equipped with the head slider are provided. The head slider is equipped with a head slider lubricant layer having an average film thickness of not more than 2.5 nm, and composed of a water-repellent resin, the lubricant layer being formed on the head slider surface and head slider protection layer surface facing the magnetic recording medium, and the surface tension of the head slider lubricant layer determined by the Fowkes equation is not more than those of the head slider surface and head slider protection layer surface.Type: GrantFiled: February 8, 2005Date of Patent: August 21, 2007Assignee: Fujitsu LimitedInventors: Hiroshi Chiba, Keiji Watanabe, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Eishin Yamakawa, Takeshi Toukairin, Jun Watanabe, Norikazu Nakamura
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Publication number: 20060106260Abstract: There are provided a composition that exhibits sufficient flowability and also displays high substrate adhesion, and a magnetic recording medium, a head slider and a magnetic recording device that use this composition as a lubricant and are thus not prone to faults. The composition comprises a fluorine-containing polyether represented by formula (1), (in formula (1), p and q represent, independently of the symbols in other formulae, any chosen integers). The composition can be produced by reacting a polymer represented by formula (2) with glycidol, HOCH2CF2O(CF2CF2O)p(CF2O)qCF2CH2OH ??(2) (in formula (2), p and q represent, independently of the symbols in other formulae, any chosen integers).Type: ApplicationFiled: February 24, 2005Publication date: May 18, 2006Inventors: Hiroshi Chiba, Yukiko Oshikubo, Keiji Watanabe, Eishin Yamakawa, Takeshi Toukairin
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Publication number: 20060044691Abstract: A magnetic recording medium and head slider that can furnish excellent head flying stability, a magnetic recording device having excellent head flying stability, and a method for manufacturing, in a short time, a magnetic recording medium and head slider that can furnish such excellent head flying stability, are provided. For both of the magnetic recording medium and head slider, the protective layers are each composed of two layers, that is, a lower layer and an upper layer thereon; the ionization potential of the lower layer is made to be smaller than that of the upper layer; and the surface free energy of the upper layer is made to be 45 mN/m or less.Type: ApplicationFiled: January 31, 2005Publication date: March 2, 2006Inventors: Norikazu Nakamura, Hiroshi Chiba, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Tsukasa Itani
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Publication number: 20050271902Abstract: A magnetic recording medium having excellent durability and corrosion resistance as well as a magnetic recording device equipped with the magnetic recording medium is provided. The protective layer of the magnetic recording medium is composed of two layers, that is, a lower layer contacting with the magnetic layer and an upper layer on the lower layer. The internal stress of the lower layer is made smaller than that of the upper layer, and the surface free energy of the lower layer is made smaller than that of the upper layer.Type: ApplicationFiled: November 4, 2004Publication date: December 8, 2005Inventors: Norikazu Nakamura, Tsukasa Itani, Yukiko Oshikubo, Shinichi Nakayama, Takashi Toyoguchi
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Publication number: 20050264937Abstract: A head slider to which little amount of contaminants is adhered, that can form a uniform and flat head lubricant layer surface and that has excellent ultra-low floating properties, as well as a magnetic recording device equipped with the head slider are provided. The head slider is equipped with a head slider lubricant layer having an average film thickness of not more than 2.5 nm, and composed of a water-repellent resin, the lubricant layer being formed on the head slider surface and head slider protection layer surface facing the magnetic recording medium, and the surface tension of the head slider lubricant layer determined by the Fowkes equation is not more than those of the head slider surface and head slider protection layer surface.Type: ApplicationFiled: February 8, 2005Publication date: December 1, 2005Applicant: FUJITSU LIMITEDInventors: Hiroshi Chiba, Keiji Watanabe, Yoshiharu Kasamatsu, Takayuki Musashi, Yukiko Oshikubo, Eishin Yamakawa, Takeshi Toukairin, Jun Watanabe, Norikazu Nakamura