公开(公告)号：US20210043228A1

公开(公告)日：2021-02-11

申请号：US16986894

申请日：2020-08-06

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI ,  Takashi FUJIMOTO

IPC: G11B5/706 ,  G11B5/714 ,  G11B5/008 ,  G11B5/735 ,  G11B5/584

Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder, in which an anisotropic magnetic field Hk is more than 5.0 kOe and less than 7.5 kOe, an anisotropic magnetic field distribution is more than 0.75 and less than 1.20, the magnetic layer has a servo pattern, the ferromagnetic powder is a hexagonal strontium ferrite powder, and an average particle size of the hexagonal strontium ferrite powder is 9 nm to 20 nm.

公开(公告)号：US20190096551A1

公开(公告)日：2019-03-28

申请号：US16132662

申请日：2018-09-17

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI ,  Masashi SHIRATA ,  Takashi FUJIMOTO

IPC: H01F1/11 ,  C01G49/06 ,  C01G49/08

Abstract: The invention provides a core-shell particle which can provide, by being calcinated, epsilon type iron oxide-based compound particles that have a small coefficient of variation of primary particle diameter and show excellent SNR and running durability when employed in a magnetic recording medium as well as applications thereof. The core-shell particle includes: a core including at least one iron oxide selected from Fe2O3 or Fe3O4, or iron oxyhydroxide; and a shell that coats the core, the shell including a polycondensate of a metal alkoxide and a metal element other than iron, as well as applications thereof.

公开(公告)号：US20180358043A1

公开(公告)日：2018-12-13

申请号：US15986882

申请日：2018-05-23

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI ,  Takashi FUJIMOTO ,  Masashi SHIRATA

IPC: G11B5/706

CPC classification number: G11B5/70615

Abstract: A magnetic recording medium includes: a non-magnetic support; and a magnetic layer including a binding agent and a ferromagnetic powder including at least one epsilon-type iron oxide compound selected from the group consisting of ε-Fe2O3 and compound represented by Formula (1) (A represents at least one metal element other than Fe, and a satisfies 0

公开(公告)号：US20130126799A1

公开(公告)日：2013-05-23

申请号：US13722444

申请日：2012-12-20

Applicant: FUJIFILM CORPORATION

Inventor： Kenji NAOI

IPC: H01B1/02

CPC classification number: H01B1/02 ,  B82Y30/00 ,  G06F3/041 ,  H01B1/22 ,  H01L31/022466 ,  H01L31/1884 ,  H01L51/442 ,  H01L51/444 ,  H05K1/095 ,  H05K2201/026 ,  H05K2201/0281 ,  Y02E10/549 ,  Y10S977/762 ,  Y10S977/783

Abstract: An electroconductive film including: electroconductive fibers, wherein the electroconductive film satisfies the following expression: 0.01

Abstract translation: 导电膜包括：导电纤维，其中导电膜满足以下表达式：0.01

公开(公告)号：US20210375314A1

公开(公告)日：2021-12-02

申请号：US17401326

申请日：2021-08-13

Applicant: The University of Tokyo ,  OSAKA UNIVERSITY ,  FUJIFILM Corporation

Inventor： Shin-ichi OHKOSHI ,  Marie YOSHIKIYO ,  Kenta IMOTO ,  Kosuke NAKAGAWA ,  Asuka NAMAI ,  Hiroko TOKORO ,  Makoto NAKAJIMA ,  Masashi SHIRATA ,  Kenji NAOI

IPC: G11B11/105 ,  G11B5/706

Abstract: Provided is a recording device. The recording device includes: an external magnetic field application unit that is configured to apply an external magnetic field to a magnetic recording medium; a light irradiation unit that is configured to irradiate light; and a light focusing unit that is configured to focus the light from the light irradiation unit by resonating the light to generate an enhanced magnetic field in which a magnetic field of the light is enhanced, in which magnetization of the magnetic recording medium is inverted by applying the external magnetic field and the enhanced magnetic field to the magnetic recording medium.

公开(公告)号：US20210043227A1

公开(公告)日：2021-02-11

申请号：US16986877

申请日：2020-08-06

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI ,  Koichi Yagishita

IPC: G11B5/706 ,  G11B5/714 ,  G11B5/735 ,  G11B5/708 ,  G11B5/008

Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder, in which the ferromagnetic powder is an ε-iron oxide powder having an average particle size of 9.0 nm to 20.0 nm, and in the ε-iron oxide powder, a content of particles having a particle size smaller than 8.0 nm is less than 20.0% by mass, a content of particles having a particle size smaller than 6.0 nm is less than 5.0% by mass, and a content of particles having a particle size greater than 25.0 nm is less than 20.0% by mass.

公开(公告)号：US20200312363A1

公开(公告)日：2020-10-01

申请号：US16830702

申请日：2020-03-26

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI

IPC: G11B5/714 ,  G11B5/706 ,  G11B5/733

Abstract: The magnetic recording medium includes a non-magnetic support; and a magnetic layer including a ferromagnetic powder, in which the ferromagnetic powder is an ε-iron oxide powder having an average particle size of 5.0 nm to 16.0 nm, a coercivity Hc in a vertical direction is 1,884 Oe to 3,141 Oe, a ten-point average roughness Rz of a surface of the magnetic layer is 35.0 nm to 45.0 nm, and a ratio Rp/Rz of a maximum peak height Rp of the surface of the magnetic layer to the Rz is 0.25 to 1.00.

公开(公告)号：US20200312359A1

公开(公告)日：2020-10-01

申请号：US16832629

申请日：2020-03-27

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI

IPC: G11B5/706 ,  G11B5/714

Abstract: The ϵ-iron oxide powder has an average particle size in a range of 5.0 to 16.0 nm and an uneven distribution of an M atom in a surface layer portion, in which the M atom is one or more kinds of atoms selected from the group consisting of an aluminum atom and an yttrium atom, and a content of the M atom with respect to 100 atom % of iron atoms is in a range of 4.0 to 9.5 atom %.

公开(公告)号：US20180366152A1

公开(公告)日：2018-12-20

申请号：US16008147

申请日：2018-06-14

Applicant: FUJIFILM Corporation

Inventor： Kenji NAOI ,  Masashi SHIRATA

IPC: G11B5/706 ,  C01G49/00 ,  G11B5/714 ,  G11B5/708

Abstract: Provided is hexagonal strontium ferrite powder for magnetic recording, in which an activation volume is 800 to 1,500 nm3, a content of rare earth atom with respect to 100 atom % of iron atom is 0.5 to 5.0 atom %, and a rare earth atom surface portion uneven distribution is provided.

公开(公告)号：US20160345439A1

公开(公告)日：2016-11-24

申请号：US15228472

申请日：2016-08-04

Applicant: FUJIFILM Corporation

Inventor： Kenichi YAMAMOTO ,  Naoharu KIYOTO ,  Kenji NAOI

IPC: H05K3/06 ,  G03F7/32 ,  G06F3/041 ,  H05K1/09 ,  H03K17/96 ,  G03F7/20 ,  H05K1/02

CPC classification number: H05K3/06 ,  B32B15/01 ,  B32B27/36 ,  B32B2307/202 ,  B32B2307/412 ,  G03C1/46 ,  G03C1/832 ,  G03C1/853 ,  G03F7/0952 ,  G03F7/2022 ,  G03F7/203 ,  G03F7/2032 ,  G03F7/32 ,  G06F3/041 ,  G06F3/044 ,  G06F2203/04103 ,  H03K17/96 ,  H05K1/0274 ,  H05K1/0298 ,  H05K1/09 ,  H05K3/106 ,  H05K3/4685 ,  H05K2203/125 ,  H05K2203/1476 ,  H05K2203/1581

Abstract: Provided is a method for producing a conductive member including: forming a first silver halide emulsion layer, a light absorption layer, and a second silver halide emulsion layer on a transparent support in this order; performing pattern exposure on the first silver halide emulsion layer; and the second silver halide emulsion layer and applying a development treatment thereto to obtain a conductive layer comprising a thin metal wire, in which the light absorption layer absorbs at least some of the wavelengths of light to which the first silver halide emulsion layer or the second silver halide emulsion layer is exposed.

Abstract translation: 本发明提供一种导电部件的制造方法，其特征在于，具有：依次在透明支撑体上形成第一卤化银乳剂层，光吸收层和第二卤化银乳剂层; 在第一卤化银乳剂层上进行图案曝光; 和第二卤化银乳剂层，并对其进行显影处理以获得包括细金属丝的导电层，其中光吸收层吸收至少一些第一卤化银乳剂层或第二卤化银乳剂层的波长的波长 卤化银乳剂层被暴露。