Patents Examined by Kevin M. Bernatz
  • Patent number: 10566522
    Abstract: A multilayer thin film for magnetic random access memory that includes thin platinum layers and thin cobalt-copper layers, and more particularly, to a multilayer thin film having magnetic layers including non-magnetic material copper that replaces a portion of the magnetic material cobalt.
    Type: Grant
    Filed: January 19, 2017
    Date of Patent: February 18, 2020
    Assignee: SK hynix Inc.
    Inventors: Sang-Ho Lim, Dong-Su Son, Tae-Young Lee, Seong-Rae Lee
  • Patent number: 10566127
    Abstract: An Fe—Si—B—C-based amorphous alloy ribbon as thick as 20-30 ?m having a composition comprising 80.0-80.7 atomic % of Fe, 6.1-7.99 atomic % of Si, and 11.5-13.2 atomic % of B, the total amount of Fe, Si and B being 100 atomic %, and further comprising 0.2-0.45 atomic % of C per 100 atomic % of the total amount of Fe, Si and B, except for inevitable impurities has a stress relief degree of 92% or more.
    Type: Grant
    Filed: December 8, 2015
    Date of Patent: February 18, 2020
    Assignees: HITACHI METALS, LTD., METGLAS, INC.
    Inventors: Eric Theisen, Yuichi Ogawa, Daichi Azuma
  • Patent number: 10559627
    Abstract: A memory device according to an embodiment includes a first conductive layer, a second conductive layer, a variable resistance layer disposed between the first conductive layer and the second conductive layer, and an organic molecular layer disposed between the variable resistance layer and the second conductive layer and containing organic molecules. Each of the organic molecules includes a first fused polycyclic unit having a first HOMO level, a second fused polycyclic unit having a second HOMO level higher in energy than the first HOMO level, and a third fused polycyclic unit disposed between the first fused polycyclic unit and the second fused polycyclic unit. The third fused polycyclic unit has a third HOMO level higher in energy than the first HOMO level and the second HOMO level.
    Type: Grant
    Filed: September 18, 2017
    Date of Patent: February 11, 2020
    Assignee: Toshiba Memory Corporation
    Inventors: Kenji Nakamura, Hideyuki Nishizawa
  • Patent number: 10553352
    Abstract: Embodiments of the disclosure pertain to methods of plating magnets with a stack of layers such that the resulting magnet assembly has improved corrosion resistance. Embodiments of the disclosure are also directed to magnet assemblies formed by such methods. Some embodiments include a High Phosphorus Electroless Nickel (HiPEN) layer with Phosphorus content greater than 11% by weight.
    Type: Grant
    Filed: March 20, 2017
    Date of Patent: February 4, 2020
    Assignee: Apple Inc.
    Inventors: Wai Man Raymund Kwok, Melissa Wah
  • Patent number: 10553786
    Abstract: This invention relates to structures comprising magnetic materials and conjugated molecules. The invention relates to magneto-resistive devices based on such structures. Structures and devices of the invention can be used as magnetic switches, magnetic sensors and in devices such in/as memory devices.
    Type: Grant
    Filed: August 27, 2015
    Date of Patent: February 4, 2020
    Assignee: YEDA RESEARCH AND DEVELOPMENT CO. LTD.
    Inventors: Oren Tal, David Rakhmilevich
  • Patent number: 10553243
    Abstract: A magnetic-disk glass substrate capable of suppressing turbulence of air flow in a vicinity of an outer circumferential side edge portion of the magnetic disk and suppressing disk flutter is provided. This magnetic-disk glass substrate includes a pair of main surfaces, a side wall surface formed on an outer circumferential side edge surface, and chamfered surfaces interposed between the side wall surface and the main surfaces, respectively. The side wall surface has a roundness of 1.5 ?m or less. A difference in radius between an inscribed circle and a circumcircle of a plurality of outlines of the side wall surface at a plurality of positions that include a central position of the magnetic-disk glass substrate in a thickness direction and are different from each other in the thickness direction is 5 ?m or less.
    Type: Grant
    Filed: February 28, 2017
    Date of Patent: February 4, 2020
    Assignee: HOYA CORPORATION
    Inventor: Masanori Tamaki
  • Patent number: 10546674
    Abstract: Conventional Fe-based soft magnetic alloy ribbons each containing Co and Ni have a problem that magnetic anisotropy that is neatly arranged in one direction cannot be induced easily even by a magnetic field annealing treatment and, therefore, a wound magnetic cores, a problem that a residual magnetic flux density Br is high, a problem that the hysteresis of the B—H curve becomes large (coercivity Hc becomes large), a problem that the change in incremental permeability relative to superimposed magnetic field becomes large, and others. In order to solve the problems, provided is an Fe-based soft magnetic alloy ribbon including a Cu-concentrated region present directly below a surface of the ribbon, and a Co-concentrated region present directly below the Cu-concentrated region. Also provided is a magnetic core including the Fe-based soft magnetic alloy ribbon.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: January 28, 2020
    Assignee: HITACHI METALS, LTD.
    Inventor: Yoshihito Yoshizawa
  • Patent number: 10540996
    Abstract: A magnetic tape has a magnetic layer containing ferromagnetic powder and binder on a nonmagnetic support. The magnetic layer contains a fatty acid ester. The full width at half maximum of the spacing distribution as measured by optical interferometry on the magnetic layer side surface of the magnetic tape before vacuum heating the magnetic tape is greater than 0 nm but less than or equal to 5.0 nm. The full width at half maximum of the spacing distribution after vacuum heating the magnetic tape is greater than 0 nm but less than or equal to 5.0 nm. The difference between the spacing Safter after vacuum heating the magnetic tape and the spacing Sbefore before vacuum heating the magnetic tape, Safter?Sbefore, is greater than 0 nm but less than or equal to 8.0 nm.
    Type: Grant
    Filed: September 29, 2016
    Date of Patent: January 21, 2020
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Norihito Kasada, Masahito Oyanagi, Toshio Tada
  • Patent number: 10537938
    Abstract: The present invention provides a magnetic core having insulating properties, and a method for manufacturing the magnetic core. Provided is a magnetic core manufactured by compression molding and subsequent thermal curing of an iron-based soft magnetic powder having a resin coating formed on particle surfaces thereof. The iron-based soft magnetic powder is one in which the particle surfaces have been coated with an inorganic insulator; the resin coating is an uncured resin coating formed by dry blending the powder with a thermosetting resin at a temperature equal to or greater than the softening point of the thermosetting resin and lower than the thermal curing initiation temperature of the resin; the compression molding is carried out by using a mold to produce a compression molded body; and the thermal curing is carried out at a temperature equal to or greater than the thermal curing initiation temperature of the thermosetting resin.
    Type: Grant
    Filed: September 17, 2015
    Date of Patent: January 21, 2020
    Assignee: NTN CORPORATION
    Inventors: Takuji Harano, Hiroyuki Noda
  • Patent number: 10535366
    Abstract: A magnetic-disk glass substrate has a circular center hole a pair of main surfaces and an edge surface. The edge surface has a side wall surface and chamfered surfaces interposed between the side wall surface and the main surfaces, and a roundness of an edge surface on an outer circumferential side is 1.5 ?m or less. Also, a midpoint A between centers of two least square circle respectively derived from outlines in a circumferential direction respectively obtained at two positions spaced apart by 200 ?m in a substrate thickness direction on the side wall surface on the outer circumferential side, and centers B and C respectively derived from a respective one of two chamfered surfaces on the outer circumferential side in the substrate thickness direction, are located such that a sum of respective distances between A and B, and A and C, is 1 ?m or less.
    Type: Grant
    Filed: February 24, 2017
    Date of Patent: January 14, 2020
    Assignee: HOYA CORPORATION
    Inventors: Masanori Tamaki, Takeyoshi Takahashi, Masaaki Ueda
  • Patent number: 10529368
    Abstract: A magnetic tape includes: a non-magnetic support; a magnetic layer on one surface side of the non-magnetic support; and a back coating layer on the other surface side. The center line average surface roughness Ra measured regarding the surface of the magnetic layer is 1.0 nm to 1.8 nm. The magnetic layer includes ferromagnetic hexagonal ferrite powder and non-magnetic powder. The tilt cos ? of the ferromagnetic hexagonal ferrite powder with respect to a surface of the magnetic layer acquired by cross section observation performed using a scanning transmission electron microscope is 0.85 to 1.00. Further, the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the back coating layer is less than or equal to 0.060.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: January 7, 2020
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 10522171
    Abstract: A magnetic tape includes a non-magnetic support; a non-magnetic layer including non-magnetic powder and a binder on the non-magnetic support; and a magnetic layer including ferromagnetic powder and a binder on the non-magnetic layer. The total thickness of the non-magnetic layer and the magnetic layer is less than or equal to 0.60 ?m. The magnetic layer includes a timing-based servo pattern, and the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is less than or equal to 0.050.
    Type: Grant
    Filed: June 20, 2017
    Date of Patent: December 31, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Norihito Kasada, Tetsuya Kaneko, Eiki Ozawa
  • Patent number: 10522180
    Abstract: The magnetic tape has a nonmagnetic layer containing nonmagnetic powder and binder on a nonmagnetic support, and a magnetic layer containing ferromagnetic powder and binder on the nonmagnetic layer; wherein the combined thickness of the nonmagnetic layer and the magnetic layer is less than or equal to 0.60 ?m, the coefficient of friction as measured on the base portion of the surface of the magnetic layer is less than or equal to 0.35, at least the magnetic layer contains one or more components selected from the group consisting of a fatty acid and a fatty acid amide, and a C—H derived carbon, C, concentration calculated from a C—H peak area ratio in a C1s spectrum obtained by X-ray photoelectron spectroscopy conducted at a photoelectron take-off angle of 10 degrees on the surface of the magnetic layer is greater than or equal to 45 atom %.
    Type: Grant
    Filed: December 15, 2016
    Date of Patent: December 31, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 10522179
    Abstract: A magnetic tape is provided in which the total thickness of the non-magnetic layer and the magnetic layer is equal to or smaller than 0.60 ?m. The magnetic layer includes ferromagnetic hexagonal ferrite powder and an abrasive. The percentage of a plan view maximum area of the abrasive confirmed in a region having a size of 4.3 ?m×6.3 ?m of the surface of the magnetic layer by plane observation using a scanning electron microscope, with respect to the total area of the region, is equal to or greater than 0.02% and less than 0.06%. Further, the tilt cos ? of the ferromagnetic hexagonal ferrite powder with respect to a surface of the magnetic layer acquired by cross section observation performed by using a scanning transmission electron microscope is 0.85 to 1.00.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: December 31, 2019
    Assignee: FUJIFILM Corporation
    Inventor: Norihito Kasada
  • Patent number: 10515751
    Abstract: A soft magnetic molded body, in which a binder component is used to bind a soft magnetic metal powder that has a flat shape, includes 60% by volume or more of the soft magnetic metal powder and 10-30% by volume of fine open pores. The binder component includes an inorganic oxide as a main component.
    Type: Grant
    Filed: March 13, 2015
    Date of Patent: December 24, 2019
    Assignee: TOKIN CORPORATION
    Inventors: Kenichi Chatani, Kenji Ikeda, Toshinori Tsuda
  • Patent number: 10515660
    Abstract: A magnetic tape is provided in which the center line average surface roughness Ra measured regarding the surface of the magnetic layer is less than or equal to 1.8 nm, and the logarithmic decrement acquired by a pendulum viscoelasticity test performed regarding the surface of the magnetic layer is less than or equal to 0.050. A back coating layer includes one or more components selected from a fatty acid and a fatty acid amide. In addition, the C—H derived C concentration calculated from the C—H peak area ratio of C1s spectra obtained by X-ray photoelectron spectroscopic analysis performed regarding the surface of the back coating layer at a photoelectron take-off angle of 10 degrees is greater than or equal to 35 atom %.
    Type: Grant
    Filed: June 9, 2017
    Date of Patent: December 24, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Masahito Oyanagi, Norihito Kasada
  • Patent number: 10510368
    Abstract: A magnetic tape is provided in which the total thickness is less than or equal to 5.30 ?m. The magnetic layer includes a timing-based servo pattern and also a fatty acid ester; and the magnetic layer surface Ra is less than or equal to 1.8 nm. The full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing vacuum heating with respect to the magnetic tape is greater than 0 nm and less than or equal to 7.0 nm, while the same value measured after performing the vacuum heating is greater than 0 nm and less than or equal to 7.0 nm, also. The difference between a spacing measured after performing the vacuum heating and a spacing measured before performing the vacuum heating is greater than 0 nm and less than or equal to 8.0 nm.
    Type: Grant
    Filed: June 16, 2017
    Date of Patent: December 17, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Tetsuya Kaneko, Norihito Kasada
  • Patent number: 10510369
    Abstract: A magnetic tape includes a non-magnetic support; a non-magnetic layer including non-magnetic powder and a binder on the non-magnetic support; and a magnetic layer including ferromagnetic powder and a binder on the non-magnetic layer. The total thickness of the non-magnetic layer and the magnetic layer is less than or equal to 0.60 ?m. The magnetic layer includes a timing-based servo pattern, the ferromagnetic powder is ferromagnetic hexagonal ferrite powder, and the magnetic layer includes an abrasive. In addition, the tilt cos ? of the ferromagnetic hexagonal ferrite powder with respect to the surface of the magnetic layer acquired by cross section observation performed using a scanning transmission electron microscope is 0.85 to 1.00.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: December 17, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Tetsuya Kaneko, Norihito Kasada, Eiki Ozawa
  • Patent number: 10510370
    Abstract: A magnetic tape is provided in which the total thickness of a non-magnetic layer and a magnetic layer is equal to or smaller than 0.60 ?m. The magnetic layer includes a timing-based servo pattern and also includes fatty acid ester. The full width at half maximum of spacing distribution measured by optical interferometry regarding the surface of the magnetic layer before performing vacuum heating with respect to the magnetic tape is greater than 0 nm and less than or equal to 7.0 nm, while the same value measured after performing the vacuum heating is also greater than 0 nm and less than or equal to 7.0 nm. Further, the difference between a spacing measured after performing the vacuum heating and a spacing measured before performing the vacuum heating is greater than 0 nm and equal to or smaller than 8.0 nm.
    Type: Grant
    Filed: June 19, 2017
    Date of Patent: December 17, 2019
    Assignee: FUJIFILM Corporation
    Inventors: Eiki Ozawa, Tetsuya Kaneko, Norihito Kasada
  • Patent number: 10501333
    Abstract: The present invention provides a spherical ferrite powder that is excellent in filling ability and moldability if used as a filler, is excellent in handling ability, and is high in resistivity; a resin compound including the ferrite powder; and a molded product made of the resin compound. The spherical ferrite powder including 15 to 30 wt % of ferrite particles having the particle diameter less than 11 ?m and have the volume average particle diameter of 10 to 50 ?m; the resin compound including the ferrite powder; and the molded product made of the resin compound are employed.
    Type: Grant
    Filed: August 31, 2015
    Date of Patent: December 10, 2019
    Assignees: POWDERTECH CO., LTD., TATSUTA ELECTRIC WIRE & CABLE CO., LTD.
    Inventors: Koji Aga, Tetsuya Igarashi, Akio Takahashi