公开(公告)号：US11232813B2

公开(公告)日：2022-01-25

申请号：US16052817

申请日：2018-08-02

申请人： Sony Corporation

发明人： Takashi Aizawa ,  Atsuhiro Abe

IPC分类号： G11B5/851 ,  G11B5/84 ,  G11B5/64 ,  G11B5/65 ,  H01J37/34 ,  G11B5/008 ,  G11B5/667 ,  H01J37/32

摘要： A film-forming apparatus and a method for manufacturing a magnetic recording medium are provided. The film-forming apparatus includes a rotating body which moves a base material with a strip shape which has flexibility, a plurality of cathodes which are provided to oppose a rotating surface of the rotating body; and a plurality of accommodating sections which accommodate each of the plurality of cathodes. The method includes sequentially film-forming a plurality of thin films on a base material using a plurality of cathodes which are provided on a moving path of the base material while moving the base material with a strip shape which has flexibility. Each of the plurality of cathodes is accommodated in a plurality of accommodating sections.

公开(公告)号：US10586560B1

公开(公告)日：2020-03-10

申请号：US16292457

申请日：2019-03-05

申请人： Headway Technologies, Inc.

发明人： Shengyuan Wang ,  Weihao Xu ,  Cherng-Chyi Han ,  Xuhui Jin ,  Min Li ,  Kunliang Zhang

IPC分类号： G11B5/127 ,  G11B5/64 ,  G11B5/31 ,  G11B5/00

摘要： A PMR (perpendicular magnetic recording) head is configured for thermally assisted magnetic recording (TAMR). The thermal energy is supplied by the near-fields of plasmons and the near-fields are directed to a magnetic recording medium by a PPG layer. The PPG layer is Rhodium (Rh) whose small-grained crystal structure normally makes it subject to thermal deformations and other weaknesses. By growing the PPG layer on a thin template layer (TTL), the portion of the PPG layer adjacent to the air-bearing surface (ABS) develops a larger grain size and stronger forces between its atomic constituents which makes it resistant to those deformations.

公开(公告)号：US10385449B2

公开(公告)日：2019-08-20

申请号：US15317562

申请日：2015-06-05

申请人： UNIVERSITY OF SURREY

发明人： Sembukuttiarachilage Ravi Silva ,  Muhammad Ahmad

IPC分类号： G11B5/64 ,  C23C16/455 ,  C01B32/16 ,  C01B32/186

摘要： A layer stack for growing graphene or carbon nanotubes (CNTs) is described. The layer stack comprises a substrate, a protective layer, and an attachment surface disposed therebetween. The protective layer is configured to allow carbon diffusion therethrough to the attachment surface, such that graphene or CNTs grow therefrom.

公开(公告)号：US20180366150A1

公开(公告)日：2018-12-20

申请号：US16052817

申请日：2018-08-02

申请人： Sony Corporation

发明人： Takashi AIZAWA ,  Atsuhiro ABE

IPC分类号： G11B5/65 ,  H01J37/34 ,  H01J37/32 ,  G11B5/64 ,  G11B5/84 ,  G11B5/667 ,  G11B5/851

摘要： A film-forming apparatus and a method for manufacturing a magnetic recording medium are provided. The film-forming apparatus includes a rotating body which moves a base material with a strip shape which has flexibility, a plurality of cathodes which are provided to oppose a rotating surface of the rotating body; and a plurality of accommodating sections which accommodate each of the plurality of cathodes. The method includes sequentially film-forming a plurality of thin films on a base material using a plurality of cathodes which are provided on a moving path of the base material while moving the base material with a strip shape which has flexibility. Each of the plurality of cathodes is accommodated in a plurality of accommodating sections.

公开(公告)号：US10134434B2

公开(公告)日：2018-11-20

申请号：US14918328

申请日：2015-10-20

申请人： The United States of America, as represented by the Secretary of the Navy

发明人： Woo K. Lee ,  Keith E. Whitener ,  Paul E. Sheehan

IPC分类号： G11B5/84 ,  B05D5/00 ,  G11B5/64 ,  C01B31/04 ,  G11B5/65 ,  H01F1/42

摘要： A method of making magnetic graphene comprising transferring or growing a graphene film on a substrate, functionalizing the graphene film, hydrogenating the graphene film and forming fully hydrogenated graphene, manipulating the extent of the hydrogen content, and forming areas of magnetic graphene and non-magnetic graphene. A ferromagnetic graphene film comprising film that has a thickness of less than two atom layers thick.

公开(公告)号：US20180268852A1

公开(公告)日：2018-09-20

申请号：US15985661

申请日：2018-05-21

申请人： Dieter Suess

发明人： Dieter Suess

IPC分类号： G11B5/66 ,  B82Y25/00 ,  G11B5/64 ,  G01R33/12 ,  G01R33/09

CPC分类号： G11B5/66 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/1207 ,  G11B5/64

摘要： A multilayer exchange spring recording media consists of a magnetically hard magnetic storage layer strongly exchange coupled to a softer nucleation host. The strong exchange coupling can be through a coupling layer or direct. The hard magnetic storage layer has a strong perpendicular anisotropy. The nucleation host consists of one or more ferromagnetic coupled layers. For a multilayer nucleation host the anisotropy increases from layer to layer. The anisotropy in the softest layer of the nucleation host can be two times smaller than that of the hard magnetic storage layer. The lateral exchange between the grains is small. The nucleation host decreases the coercive field significantly while keeping the energy barrier of the hard layer almost unchanged. The coercive field of the total structure depends on one over number of layers in the nucleation host. The invention proposes a recording media that overcomes the writeability problem of perpendicular recording media.

公开(公告)号：US20180211689A1

公开(公告)日：2018-07-26

申请号：US15925749

申请日：2018-03-19

申请人： Dieter Suess

发明人： Dieter Suess

IPC分类号： G11B5/66 ,  G01R33/12 ,  G11B5/64 ,  B82Y25/00 ,  G01R33/09

CPC分类号： G11B5/66 ,  B82Y25/00 ,  G01R33/093 ,  G01R33/1207 ,  G11B5/64

摘要： A multilayer exchange spring recording media consist of a magnetically hard magnetic storage layer strongly exchange coupled to a softer nucleation host. The strong exchange coupling can be through a coupling layer or direct. The hard magnetic storage layer has a strong perpendicular anisotropy. The nucleation host consists of one or more ferromagnetic coupled layers. For a multilayer nucleation host the anisotropy increases from layer to layer. The anisotropy in the softest layer of the nucleation host can be two times smaller than that of the hard magnetic storage layer. The lateral exchange between the grains is small. The nucleation host decreases the coercive field significantly while keeping the energy barrier of the hard layer almost unchanged. The coercive field of the total structure depends on one over number of layers in the nucleation host. The invention proposes a recording media that overcomes the writeability problem of perpendicular recording media.

公开(公告)号：US20180142423A1

公开(公告)日：2018-05-24

申请号：US15568042

申请日：2016-04-18

申请人： Tagit - EAS Ltd.

发明人： Vladimir MANOV ,  Mario FUSE

IPC分类号： D21H27/38 ,  G11B5/64 ,  H01F1/153 ,  D21H21/48 ,  D21H23/26

CPC分类号： D21H27/38 ,  B41M5/41 ,  D21H15/02 ,  D21H19/00 ,  D21H21/40 ,  D21H21/48 ,  D21H23/24 ,  D21H23/26 ,  G08B13/24 ,  G08B13/2408 ,  G08B13/2442 ,  G08B13/2445 ,  G11B5/64 ,  G11B5/642 ,  H01F1/153 ,  H01F1/15391

摘要： A recording medium is provided, such as paper, secured by magnetic microwires. The recording medium comprises: a pulp structure formed by pulp fibers, said pulp structure carrying microwires having a metal core of a predetermined material composition, and an insulating layer coating on said metal core; and at least one coating layer on at least one side of said pulp structure. The pulp structure is a single-layer structure with the microwires fully embedded in said single layer, the microwires having cross-sectional dimensions approximately equal to cross-sectional dimensions of the pulp fibers.

公开(公告)号：US09685183B2

公开(公告)日：2017-06-20

申请号：US14451779

申请日：2014-08-05

申请人： Seagate Technology LLC

发明人： Yingguo Peng ,  Xiaowei Wu ,  Ganping Ju ,  Bin Lu

IPC分类号： G11B5/66 ,  G11B5/65 ,  G11B5/64 ,  G11B5/84

CPC分类号： G11B5/653 ,  G11B5/64 ,  G11B5/65 ,  G11B5/84

摘要： An apparatus includes a substrate and a magnetic layer coupled to the substrate. The magnetic layer includes an alloy that has magnetic hardness that is a function of the degree of chemical ordering of the alloy. The degree of chemical ordering of the alloy in a first portion of the magnetic layer is greater than the degree of chemical ordering of the alloy in a second portion of the magnetic layer, and the first portion of the magnetic layer is closer to the substrate than the second portion of the magnetic layer.

公开(公告)号：US09548074B2

公开(公告)日：2017-01-17

申请号：US14629781

申请日：2015-02-24

申请人： Seagate Technology LLC

发明人： Shaoping Li ,  Kaizhong Gao ,  Lei Wang ,  Wenzhong Zhu ,  Xiaobin Wang

IPC分类号： G11B5/64 ,  G11B5/667 ,  B82Y10/00 ,  G11B5/74 ,  G11B5/82 ,  G11B5/66 ,  H01F41/02 ,  G11B5/65 ,  G11B5/00

CPC分类号： G11B5/667 ,  B82Y10/00 ,  G11B5/64 ,  G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  G11B5/743 ,  G11B5/746 ,  G11B5/82 ,  G11B2005/0029 ,  H01F41/0206 ,  Y10S428/90 ,  Y10T29/4902 ,  Y10T29/49032 ,  Y10T29/49067 ,  Y10T428/12458 ,  Y10T428/12465 ,  Y10T428/12931 ,  Y10T428/26 ,  Y10T428/265

摘要： A perpendicular magnetic recording medium adapted for high recording density and high data recording rate comprises a non-magnetic substrate having at least one surface with a layer stack formed thereon, the layer stack including a perpendicular recording layer containing a plurality of columnar-shaped magnetic grains extending perpendicularly to the substrate surface for a length, with a first end distal the surface and a second end proximal the surface, wherein each of the magnetic grains has: (1) a gradient of perpendicular magnetic coercivity Hk extending along its length between the first end and second ends; and (2) predetermined local exchange coupling strengths along the length.

摘要翻译： 适用于高记录密度和高数据记录速率的垂直磁记录介质包括具有至少一个具有在其上形成层叠层的表面的非磁性基板，该层堆叠包括垂直记录层，该垂直记录层包含多个柱状磁性颗粒 垂直于衬底表面延伸一段长度，第一端远离表面，靠近表面的第二端，其中每个磁性颗粒具有：（1）垂直磁矫顽力Hk沿其长度在第一 末端和末端; 和（2）沿着长度的预定局部交换耦合强度。