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1. 发明公开

US20230178106A1 MAGNETIC STACK INCLUDING NON-MAGNETIC SEED LAYER FOR HARD DISK DRIVE MEDIA 审中-公开
公开(公告)号：US20230178106A1
公开(公告)日：2023-06-08
申请号：US17554341
申请日：2021-12-17
申请人： Seagate Technology LLC
发明人： Florin Zavaliche , Kai Chieh Chang , Pin-Wei Huang , Ganping Ju , Jan-Ulrich Thiele
IPC分类号： G11B5/716 , H01L43/02 , H01L43/10 , H01L43/12
CPC分类号： G11B5/716 , H01L43/02 , H01L43/10 , H01L43/12
摘要： A magnetic stack includes a substrate and a soft magnetic underlayer deposited on a top surface of the substrate. A heat sink layer is disposed on top of the soft magnetic underlayer, and an interlayer is deposited on top of the heat sink layer. A non-magnetic seed layer is deposited on top of the interlayer. A magnetic recording structure which includes more than one magnetic recording layer is deposited on the top surface of the non-magnetic seed layer.

2. 发明申请

US20210056996A1 TAPE MEDIA HAVING SYNERGISTIC MAGNETIC RECORDING LAYER AND UNDERLAYER 有权
公开(公告)号：US20210056996A1
公开(公告)日：2021-02-25
申请号：US16545963
申请日：2019-08-20
申请人： International Business Machines Corporation
发明人： Richard Bradshaw
IPC分类号： G11B5/848 , G11B5/716 , G11B5/733
摘要： A product, according to one approach, includes an underlayer and a magnetic recording layer formed above the underlayer. The underlayer includes first encapsulated nanoparticles each comprising a first magnetic nanoparticle encapsulated by a first aromatic polymer, and a first polymeric binder binding the first encapsulated nanoparticles. The recording layer includes second encapsulated nanoparticles each comprising a second magnetic nanoparticle encapsulated by an encapsulating layer, and a second polymeric binder binding the second encapsulated nanoparticles.

3. 发明申请

US20200342907A1 MAGNETIC RECORDING CARTRIDGE 审中-公开
公开(公告)号：US20200342907A1
公开(公告)日：2020-10-29
申请号：US16502418
申请日：2019-07-03
申请人： Sony Corporation
发明人： Minoru YAMAGA , Noboru SEKIGUCHI
IPC分类号： G11B23/107 , G11B5/66 , G11B5/584 , G11B5/73 , G11B5/716 , G11B5/78 , G11B5/714 , G11B5/706
摘要： A magnetic recording cartridge includes a magnetic recording medium of which an average thickness tT is tT≤5.6 μm, a dimensional change amount Δw in a width direction with respect to a tension change in a longitudinal direction is 660 ppm/N≤Δw, and a squareness ratio in a vertical direction is 65% or more, in which the magnetic recording medium is accommodated in a state of being wound around a reel and (a servo track width on an inner side of winding of the magnetic recording medium)−(a servo track width on an outer side of winding of the magnetic recording medium)>0 is satisfied.

4. 发明申请

US20190304494A1 PROTECTIVE LAYER FOR MITIGATING PROTRUDING DEFECTS IN MAGNETIC TAPE RECORDING MEDIA 审中-公开
公开(公告)号：US20190304494A1
公开(公告)日：2019-10-03
申请号：US16447706
申请日：2019-06-20
申请人： International Business Machines Corporation
发明人： Robert G. Biskeborn , Calvin S. Lo
IPC分类号： G11B5/708 , G11B5/716 , G11B5/72
摘要： A method for forming a magnetic recording medium according to one embodiment includes forming a magnetic layer above an underlayer. The magnetic layer includes a first magnetic material and particulates. A protective layer is formed above the magnetic layer, the protective layer including a second material. A method for forming a magnetic recording medium according to another embodiment includes forming a first nonmagnetic layer above a base film. The first nonmagnetic layer has first nonmagnetic particles. A second nonmagnetic layer is formed above the first nonmagnetic layer, the second nonmagnetic layer having second nonmagnetic particles. A magnetic layer is formed above the second nonmagnetic layer, the magnetic layer including a magnetic material.

5. 发明授权

US10210894B1 Magnetic recording medium including multiple magnetic layers with multiple regions having aligned easy magnetization axes and magnetic recording and reproducing device 有权
公开(公告)号：US10210894B1
公开(公告)日：2019-02-19
申请号：US15897186
申请日：2018-02-15
申请人： Kabushiki Kaisha Toshiba
发明人： Hirofumi Suto , Taro Kanao , Tazumi Nagasawa , Rie Sato , Koichi Mizushima
IPC分类号： G11B5/012 , G11B5/716 , G11B5/66 , G11B5/82
摘要： According to one embodiment, a magnetic recording medium includes a first layer and a second layer. The first layer includes a first magnetic region, a second magnetic region, and a nonmagnetic region provided between the first and second magnetic regions. A direction from the second magnetic region toward the first magnetic region is along a first direction. The second layer includes third, fourth, and fifth magnetic regions. At least a portion of the fifth magnetic region is provided between the third and fourth magnetic regions. The third magnetic region overlaps the first magnetic region in a second direction crossing the first direction. The fourth magnetic region overlaps the second magnetic region in the second direction. The fifth magnetic region overlaps the nonmagnetic region in the second direction. An easy magnetization axis of each of the first to fifth magnetic regions is aligned with the second direction.

6. 发明授权

US09984713B1 Heat assisted magnetic recording media with enhanced tuning exchange coupling 有权
公开(公告)号：US09984713B1
公开(公告)日：2018-05-29
申请号：US15615782
申请日：2017-06-06
申请人： Seagate Technology LLC
发明人： Antonio Javier Zambano , Connie Chunling Liu , Xiaoding Ma , ZhaoHui Fan , Jerry Kueirweei Chour
IPC分类号： G11B5/716 , G11B5/65 , G11B5/66 , G11B5/706 , G11B5/712 , G11B5/73 , G11B5/852 , G11B5/82
CPC分类号： G11B5/716 , G11B5/65 , G11B5/656 , G11B5/66 , G11B5/70621 , G11B5/70626 , G11B5/712 , G11B5/7325 , G11B5/82 , G11B5/852
摘要： An apparatus is disclosed. The apparatus includes a storage layer, a first write layer, and a second write layer. The first write layer is disposed over the storage layer. The second write layer is disposed over the first write layer. The anisotropy field and magnetization associated with the second write layer at writing temperature is greater than anisotropy field and magnetization associated with the first write layer at the writing temperature.

7. 发明授权

US09799363B2 Damping controlled composite magnetic media for heat assisted magnetic recording 有权
公开(公告)号：US09799363B2
公开(公告)日：2017-10-24
申请号：US13802354
申请日：2013-03-13
申请人： Seagate Technology LLC
发明人： Xi Chen , Yingguo Peng , Jan-Ulrich Thiele , Ganping Ju , Thomas Roscamp
IPC分类号： G11B5/65 , G11B5/716 , G11B5/68 , G11B5/66
CPC分类号： G11B5/716 , G11B5/65 , G11B5/66 , G11B5/68
摘要： A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1.

8. 发明申请

US20160099017A1 LAYERED SEGREGANT HEAT ASSISTED MAGNETIC RECORDING (HAMR) MEDIA 审中-公开
标题翻译：层叠式热辅助磁记录（HAMR）介质
公开(公告)号：US20160099017A1
公开(公告)日：2016-04-07
申请号：US14505440
申请日：2014-10-02
申请人： HGST NETHERLANDS B.V.
发明人： Olav Hellwig , Oleksandr Mosendz , Dieter K. Weller
IPC分类号： G11B5/716 , G11B5/702
CPC分类号： G11B5/65 , G11B5/66 , G11B5/7379 , G11B2005/0021
摘要： According to one embodiment, a magnetic recording medium includes a substrate, and a magnetic recording layer structure positioned above the substrate, the magnetic recording layer structure including: a first magnetic recording layer having a first plurality of magnetic grains surrounded by a first segregant; a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a second plurality of magnetic grains surrounded by a second segregant; and a third magnetic recording layer positioned above the second magnetic recording layer, the third magnetic recording layer having a third plurality of magnetic grains surrounded by a third segregant, where at least the first segregant is primarily a combination of carbon and a second component, and where the second segregant is primarily carbon.
摘要翻译：根据一个实施例，磁记录介质包括基板和位于基板上方的磁记录层结构，所述磁记录层结构包括：第一磁记录层，具有被第一分离体包围的第一多个磁性颗粒; 位于所述第一磁记录层上方的第二磁记录层，所述第二磁记录层具有由第二分离体包围的第二多个磁性颗粒; 以及位于第二磁记录层上方的第三磁记录层，所述第三磁记录层具有被第三分离体包围的第三多个磁性颗粒，至少所述第一分离体主要是碳和第二组分的组合，以及其中第二分离器主要是碳。

9. 发明申请

US20140334039A1 PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING NOVEL SEED LAYER 有权
标题翻译：具有新颖种子层的全能磁记录介质
公开(公告)号：US20140334039A1
公开(公告)日：2014-11-13
申请号：US13890168
申请日：2013-05-08
申请人： HGST NETHERLANDS B.V.
发明人： Akemi Hirotsune , Ikuko Takekuma , Hiroaki Nemoto
IPC分类号： G11B5/716
CPC分类号： G11B5/732
摘要： A magnetic medium for perpendicular magnetic data recording, having improved magnetic properties through use of a novel seed layer. The magnetic medium includes a substrate having a seed layer, a magnetic under-layer and a magnetic recording layer formed there-over. The seed layer includes an element selected from a first group of Cr, Co, Fe and Ni, and at least one element that is selected from the other elements of the first group or from a second group consisting of W, Mo and Ru. A buffer layer may be included between the substrate and the seed layer.
摘要翻译：用于垂直磁数据记录的磁介质，通过使用新颖的种子层具有改进的磁性能。磁介质包括具有种子层，磁性底层和在其上形成的磁记录层的衬底。种子层包括选自第一组Cr，Co，Fe和Ni的元素，以及选自第一组的其它元素或由W，Mo和Ru组成的第二组的至少一种元素。衬底和种子层之间可以包括缓冲层。

10. 发明申请

US20140272473A1 DAMPING CONTROLLED COMPOSITE MAGNETIC MEDIA FOR HEAT ASSISTED MAGNETIC RECORDING 有权
标题翻译：用于热辅助磁记录的阻尼控制复合磁介质
公开(公告)号：US20140272473A1
公开(公告)日：2014-09-18
申请号：US13802354
申请日：2013-03-13
申请人： Seagate Technology LLC
发明人： Xi Chen , Yingguo Peng , Jan-Ulrich Thiele , Ganping Ju , Thomas Roscamp
IPC分类号： G11B5/716 , G11B5/68
CPC分类号： G11B5/716 , G11B5/65 , G11B5/66 , G11B5/68
摘要： A magnetic stack includes a substrate and a magnetic recording layer disposed over the substrate. The magnetic recording layer comprises magnetic crystalline grains and a segregant disposed between grain boundaries of the crystalline grains. One or both of the magnetic crystalline grains and the segregant are doped with a rare earth or transition metal dopant in an amount that provides the magnetic recording layer with a magnetic damping value, α, between about 0.1 to about 1.
摘要翻译：磁性堆叠包括衬底和设置在衬底上的磁记录层。磁记录层包括磁晶粒和设置在晶粒的晶界之间的分离器。磁性晶粒和分离器中的一个或两个掺杂有稀土或过渡金属掺杂剂，其量使磁记录层具有约0.1至约1之间的磁阻尼值α。

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