Patents by Inventor Shuichi Murakami

Shuichi Murakami 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).

  • Publication number: 20130148242
    Abstract: According to one embodiment, a magnetic recording head includes a spin-torque oscillator between a main pole and a trailing shield. An oscillation layer of the spin-torque oscillator is formed by repeatedly stacking two or more laminates each including a metallic magnetic layer of a body-centered cubic crystalline metal and a metallic magnetic layer containing cobalt. The film thickness of each metallic magnetic layer is more than 0.2 nm and not more than 3 nm. The intensity of an anisotropic magnetic field is higher than a value obtained by subtracting the intensity of a gap magnetic field from the intensity of a diamagnetic field and lower than the intensity of the diamagnetic field.
    Type: Application
    Filed: August 14, 2012
    Publication date: June 13, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuhiko KOUI, Mariko KITAZAKI, Shuichi MURAKAMI, Kenichiro YAMADA
  • Patent number: 8454131
    Abstract: An ink jet print head is provided which, during a suction-based recovery operation, can effectively remove air bubbles from the common ink path by producing an ink flow in the common ink path. In each of a plurality of bubble forming chambers where an element is installed to generate a thermal energy, there are provided a first ink path for leading ink directly from the ink supply port and a second ink path for leading ink from the common ink path formed on a far side of the array of the bubble forming chambers with respect to the ink supply port. The plurality of the first ink paths include those ink paths with less flow resistance than that of the second ink paths and those ink paths with higher flow resistance than that of the second ink paths.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: June 4, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuichi Murakami, Masataka Eida
  • Patent number: 8446698
    Abstract: A magnetoresistive element includes a lamination body and a pair of electrodes. The lamination body includes a first magnetic layer, a second magnetic layer, and a spacer layer. The spacer layer is provided between the first magnetic layer and the second magnetic layer and includes an oxide layer. The oxide layer includes at least one element selected from the group consisting of Zn, In, Sn, and Cd, and at least one element selected from the group consisting of Fe, Co, and Ni.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: May 21, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko Fuji, Michiko Hara, Hideaki Fukuzawa, Hiromi Yuasa, Shuichi Murakami
  • Patent number: 8400734
    Abstract: An example magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes is operable to pass a current through the laminated body.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: March 19, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenichiro Yamada, Hitoshi Iwasaki, Junichi Akiyama, Masayuki Takagishi, Tomomi Funayama, Masahiro Takashita, Mariko Shimizu, Shuichi Murakami, Tadashi Kai
  • Publication number: 20130063840
    Abstract: According to one embodiment, a magnetic head has a main magnetic pole, a write-shield constituting the main magnetic pole and a magnetic circuit, and a spin torque oscillation element provided between the main magnetic pole and the write-shield. The spin torque oscillation element is provided with a first oscillation layer, a nonmagnetic spin sink layer, a second oscillation layer, a nonmagnetic intermediate layer, and a spin injection layer provided in sequence from the write-shield side to the main magnetic pole side. The nonmagnetic spin sink layer is formed of at least one element selected from the group consisting of Ru, Rh, Ta, W, Cr, Ir, Mo, Re, Nb, Pt, and Pd.
    Type: Application
    Filed: June 22, 2012
    Publication date: March 14, 2013
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Katsuhiko Koui, Shuichi Murakami, Mariko Kitazaki, Yusuke Tomoda, Norihito Fujita
  • Patent number: 8382248
    Abstract: A liquid discharge head is arranged in a manner that in the cross-section of a discharge port perpendicular to a liquid discharge direction, the discharge port includes at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction. The first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: February 26, 2013
    Assignee: Canon Kabushiki Kaisha
    Inventors: Shuichi Murakami, Yasunori Takei
  • Patent number: 8383727
    Abstract: Provided is a carbodiimide-modified, high-density polyolefin-based adhesive with minimal lowering of adhesion power even in a high temperature environment, and a laminate having excellent interlayer adhesion power at high temperatures prepared by using the adhesive. Provided is an adhesive obtained by reaction of a polyolefin (A) having a group reactive with a carbodiimide group and a compound (B) containing a carbodiimide group in the presence of an unmodified polyolefin (C), having a ratio of a peak intensity at 2130 to 2140 cm?1 to a peak intensity at 1470 cm?1 of 50% or less (but not including 0%).
    Type: Grant
    Filed: March 13, 2006
    Date of Patent: February 26, 2013
    Assignee: Mitsui Chemicals, Inc.
    Inventor: Shuichi Murakami
  • Patent number: 8345389
    Abstract: A magnetoresistive element includes a first ferromagnetic layer, a second ferromagnetic layer, a nonmagnetic layer, a first metal layer, a second metal layer, a first electrode, and a second electrode. The nonmagnetic layer is provided between the first ferromagnetic layer and the second ferromagnetic layer. The first metal layer includes Au and is provided so that the first ferromagnetic layer is sandwiched between the nonmagnetic layer and the first metal layer. The second metal layer includes a CuNi alloy, and is provided so that the first metal layer is sandwiched between the first ferromagnetic layer and the second metal layer. In addition, magnetization of either one of the first ferromagnetic layer and the second ferromagnetic layer is fixed in a direction. Magnetization of the other is variable in response to an external field. At least one of the first ferromagnetic layer and the second ferromagnetic layer includes a half metal.
    Type: Grant
    Filed: September 10, 2010
    Date of Patent: January 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hiromi Yuasa, Shuichi Murakami, Yoshihiko Fuji, Hideaki Fukuzawa
  • Publication number: 20120308728
    Abstract: A magnetoresistive element includes a magnetoresistive film including a magnetization pinned layer, a magnetization free layer, an intermediate layer arranged between the magnetization pinned layer and the magnetization free layer, a cap layer arranged on the magnetization pinned layer or on the magnetization free layer, and a functional layer arranged in the magnetization pinned layer, in the magnetization free layer, in the interface between the magnetization pinned layer and the intermediate layer, in the interface between the intermediate layer and the magnetization free layer, or in the interface between the magnetization pinned layer or the magnetization free layer and the cap layer, and a pair of electrodes which pass a current perpendicularly to a plane of the magnetoresistive film, in which the functional layer is formed of a layer including nitrogen and a metal material containing 5 atomic % or more of Fe.
    Type: Application
    Filed: August 13, 2012
    Publication date: December 6, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideaki FUKUZAWA, Shuichi Murakami, Hiromi Yuasa, Yoshihiko Fuji
  • Patent number: 8315020
    Abstract: A method for manufacturing a magneto-resistance effect element is provided. The magneto-resistance effect element includes a first magnetic layer including a ferromagnetic material, a second magnetic layer including a ferromagnetic material and a spacer layer provided between the first magnetic layer and the second magnetic layer, the spacer layer having an insulating layer and a conductive portion penetrating through the insulating layer. The method includes: forming a film to be a base material of the spacer layer; performing a first treatment using a gas including at least one of oxygen molecules, oxygen atoms, oxygen ions, oxygen plasma and oxygen radicals on the film; and performing a second treatment using a gas including at least one of hydrogen molecules, hydrogen atoms, hydrogen ions, hydrogen plasma, hydrogen radicals, deuterium molecules, deuterium atoms, deuterium ions, deuterium plasma and deuterium radicals on the film submitted to the first treatment.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: November 20, 2012
    Assignees: Kabushiki Kaisha Toshiba, TDK Corporation
    Inventors: Hiromi Yuasa, Hideaki Fukuzawa, Yoshihiko Fuji, Shuichi Murakami, Michiko Hara, Kunliang Zhang, Min Li, Erhard Schreck
  • Publication number: 20120268844
    Abstract: An example magnetic writing head includes a main magnetic pole, a coil to generate an ampere magnetic field to magnetize the main magnetic pole to cause the magnetized main magnetic pole to generate a magnetic field, and a laminated body. The laminated body includes a first magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole and a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole.
    Type: Application
    Filed: July 3, 2012
    Publication date: October 25, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Kenichiro Yamada, Hitoshi Iwasaki, Junichi Akiyama, Masayuki Takagishi, Tomomi Funayama, Masahiro Takashita, Mariko Shimizu, Shuichi Murakami, Tadashi Kai
  • Patent number: 8295009
    Abstract: An example magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes is operable to pass a current through the laminated body.
    Type: Grant
    Filed: August 19, 2011
    Date of Patent: October 23, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kenichiro Yamada, Hitoshi Iwasaki, Junichi Akiyama, Masayuki Takagishi, Tomomi Funayama, Masahiro Takashita, Mariko Shimizu, Shuichi Murakami, Tadashi Kai
  • Publication number: 20120229936
    Abstract: According to one embodiment, a magneto-resistance effect device includes: a multilayer structure having a cap layer; a magnetization pinned layer; a magnetization free layer provided between the cap layer and the magnetization pinned layer; a spacer layer provided between the magnetization pinned layer and the magnetization free layer; a function layer which is provided in the magnetization pinned layer, between the magnetization pinned layer and the spacer layer, between the spacer layer and the magnetization free layer, in the magnetization free layer, or between the magnetization free layer and the cap layer, the function layer having oxide containing at least one element selected from Zn, In, Sn and Cd, and at least one element selected from Fe, Co and Ni; and a pair of electrodes for applying a current perpendicularly to a film plane of the multilayer structure.
    Type: Application
    Filed: May 25, 2012
    Publication date: September 13, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiko Fuji, Hideaki Fukuzawa, Hiromi Yuasa, Michiko Hara, Shuichi Murakami
  • Publication number: 20120218330
    Abstract: With an ink jet head having for each color two parallel columns of nozzles arranged shifted by one-half the pitch, odd-numbered rasters and even-numbered rasters are printed by the two nozzle columns. The registration between the odd- and even-numbered rasters is secured during the printing to produce a high quality image. The ink ejection timing between the two raster groups is shifted by a predetermined interval to form adjustment patterns; the adjustment patterns are checked and, according to the check result, an adjustment value for the ink ejection timing between the two ink nozzle columns is entered, and the entered adjustment value is stored to be reflected on the actual printing operation. To facilitate the adjustment pattern check, the adjustment patterns have a dot distribution with a blue noise characteristic at a resolution at which the printing apparatus can print.
    Type: Application
    Filed: February 28, 2012
    Publication date: August 30, 2012
    Applicant: CANON KABUSHIKI KAISHA
    Inventors: Miyuki Fujita, Hiroshi Tajika, Yuji Konno, Shuichi Murakami, Norihiro Kawatoko, Takayuki Ogasahara, Tetsuya Edamura, Tetsuhiro Maeda
  • Publication number: 20120212857
    Abstract: According to one embodiment, a magneto-resistive effect device includes a stacked body, a pair of electrodes for supplying current in a stacking direction of the stacked body. The stacked body includes a first magnetic layer, a second magnetic layer, and a spacer layer disposed between the first magnetic layer and the second magnetic layer. At least one of the first magnetic layer, the second magnetic layer, and the spacer layer includes an oxide layer formed from a metal oxide. A crystalline structure of the metal oxide is a NaCl structure.
    Type: Application
    Filed: September 22, 2011
    Publication date: August 23, 2012
    Applicant: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko FUJI, Michiko Hara, Hideaki Fukuzawa, Hiromi Yuasa, Shuichi Murakami
  • Publication number: 20120206837
    Abstract: A magnetoresistive element includes a lamination body and a pair of electrodes. The lamination body includes a first magnetic layer, a second magnetic layer, and a spacer layer. The spacer layer is provided between the first magnetic layer and the second magnetic layer and includes an oxide layer. The oxide layer includes at least one element selected from the group consisting of Zn, In, Sn, and Cd, and at least one element selected from the group consisting of Fe, Co, and Ni.
    Type: Application
    Filed: September 15, 2011
    Publication date: August 16, 2012
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Yoshihiko FUJI, Michiko Hara, Hideaki Fukuzawa, Hiromi Yuasa, Shuichi Murakami
  • Publication number: 20120202144
    Abstract: Disclosed is a pellicle having a mask adhesive layer having appropriate softness, having a small adhesive residue after being peeled off from a mask, and having good handling characteristics; and a pellicle for preventing position deviation of patterns, in particular in double patterning. The pellicle of the present invention includes a pellicle frame, a pellicle membrane disposed on one end surface of the pellicle frame, and a mask adhesive layer disposed on other end surface of the pellicle frame; wherein the mask adhesive layer includes 35 to 170 weight parts of a hardness adjuster (B) containing a polypropylene (b1) and a propylene based elastomer (b2) per 100 weight parts of a styrene resin (A); and in an electron microscopic photograph of the mask adhesive layer, a phase-separated structure of a continuous phase of the styrene resin (A) and a discontinuous phase of the hardness adjuster (B) is observed.
    Type: Application
    Filed: October 6, 2010
    Publication date: August 9, 2012
    Applicant: Mitsui Chemicals, Inc.
    Inventors: Shuichi Murakami, Takashi Kozeki, Minehiro Mori
  • Patent number: 8238060
    Abstract: A magnetic recording head includes: a main magnetic pole; a laminated body; and a pair of electrodes. The laminated body includes a first magnetic layer having a coercivity lower than magnetic field applied by the main magnetic pole, a second magnetic layer having a coercivity lower than the magnetic field applied by the main magnetic pole, and an intermediate layer provided between the first magnetic layer and the second magnetic layer. The pair of electrodes are operable to pass a current through the laminated body.
    Type: Grant
    Filed: May 14, 2010
    Date of Patent: August 7, 2012
    Inventors: Kenichiro Yamada, Hitoshi Iwasaki, Junichi Akiyama, Masayuki Takagishi, Tomomi Funayama, Masahiro Takashita, Mariko Shimizu, Shuichi Murakami, Tadashi Kai
  • Patent number: 8228643
    Abstract: A method for manufacturing a magneto-resistance effect element is provided. The magneto-resistance effect element includes a first magnetic layer including a ferromagnetic material, a second magnetic layer including a ferromagnetic material and a spacer layer provided between the first magnetic layer and the second magnetic layer, the spacer layer having an insulating layer and a conductive portion penetrating through the insulating layer. The method includes: forming a film to be a base material of the spacer layer; performing a first treatment using a gas including at least one of oxygen molecules, oxygen atoms, oxygen ions, oxygen plasma and oxygen radicals on the film; and performing a second treatment using a gas including at least one of nitrogen ions, nitrogen atoms, nitrogen plasma, and nitrogen radicals on the film submitted to the first treatment.
    Type: Grant
    Filed: September 25, 2009
    Date of Patent: July 24, 2012
    Assignees: Kabushiki Kaisha Toshiba, TDK Corporation
    Inventors: Hiromi Yuasa, Hideaki Fukuzawa, Yoshihiko Fuji, Shuichi Murakami, Michiko Hara, Kunliang Zhang, Min Li, Erhard Schreck
  • Patent number: 8213130
    Abstract: A magnetoresistive element includes a first electrode, a second electrode, a first magnetic layer, a second magnetic layer, a spacer layer, an oxide layer, and a metal layer. The oxide layer is provided between the first electrode and the first magnetic layer, or within the first magnetic layer, or between the first magnetic layer and the spacer layer, or within the spacer layer, or between the spacer layer and the second magnetic layer, or within the second magnetic layer, or between the second magnetic layer and the second electrode. The oxide layer includes at least one element of Zn, In, Sn, and Cd, and at least one element of Fe, Co, and Ni. The metal layer includes at least one element of Zn, In, Sn, and Cd by not less than 5 at % and not more than 80 at %, and at least one element of Fe, Co, and Ni.
    Type: Grant
    Filed: September 16, 2011
    Date of Patent: July 3, 2012
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Yoshihiko Fuji, Michiko Hara, Hideaki Fukuzawa, Hiromi Yuasa, Shuichi Murakami