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91. 发明申请

US20170263278A1 MAGNETIC-DISK GLASS SUBSTRATE, MAGNETIC DISK AND METHOD FOR MANUFACTURING MAGNETIC-DISK GLASS SUBSTRATE 审中-公开
公开(公告)号：US20170263278A1
公开(公告)日：2017-09-14
申请号：US15608346
申请日：2017-05-30
申请人： HOYA CORPORATION
发明人： Masaaki UEDA
IPC分类号： G11B5/82 , G11B5/73 , B24B7/24 , G11B5/84
摘要： A magnetic-disk glass substrate of the present invention includes a pair of main surfaces, a side wall surface, and a chamfered surface between the main surfaces and the side wall surface. Regarding surface properties of at least one of the side wall surface and the chamfered surface of the glass substrate, an arithmetic average roughness (Ra) is 0.015 gm or less, and a bearing factor of a roughness cross-sectional area when a roughness percentage is 60% is 95% or more in a bearing curve of a roughness cross-sectional area.

92. 发明授权

US09728218B2 Magnetic recording medium for heat-assisted magnetic recording 有权
公开(公告)号：US09728218B2
公开(公告)日：2017-08-08
申请号：US14484829
申请日：2014-09-12
申请人： FUJI ELECTRIC CO., LTD.
发明人： Shinji Uchida
IPC分类号： G11B5/73 , G11B5/65 , G11B5/66 , G11B5/74 , G11B5/708 , G11B5/00
CPC分类号： G11B5/7325 , G11B5/65 , G11B5/66 , G11B5/708 , G11B5/743 , G11B2005/0021
摘要： A magnetic recording medium for heat-assisted magnetic recording is provided. A magnetic recording layer includes upper and lower magnetic recording layers. The lower magnetic recording layer has a lower granular structure including lower magnetic crystal grains, and a lower non-magnetic portion, that surrounds the lower magnetic crystal grains, mainly composed of carbon. The upper magnetic recording layer has an upper granular structure including upper magnetic crystal grains, and an upper non-magnetic portion, that surrounds the upper magnetic crystal grains, formed from a material selected from the group consisting of silicon nitride, titanium oxide and titanium nitride.

93. 发明授权

US09689065B2 Magnetic stack including crystallized segregant induced columnar magnetic recording layer 有权
公开(公告)号：US09689065B2
公开(公告)日：2017-06-27
申请号：US14577641
申请日：2014-12-19
申请人： Seagate Technology LLC
发明人： Jingsheng Chen , Kaifeng Dong , Ganping Ju , Yingguo Peng
IPC分类号： G11B5/66 , C23C14/06 , G11B5/65 , G11B5/73 , C23C14/08 , C23C14/16 , C23C14/35
CPC分类号： C23C14/06 , C23C14/0641 , C23C14/083 , C23C14/165 , C23C14/352 , G11B5/65 , G11B5/7325
摘要： A stack includes a substrate, a magnetic recording layer having a columnar structure, and an interlayer disposed between the substrate and the magnetic recording layer. The columnar structure includes magnetic grains separated by a crystalline segregant or a combination of crystalline and amorphous segregants.

94. 发明申请

US20170169848A1 GLASS SUBSTRATE FOR MAGNETIC DISK AND MAGNETIC DISK 审中-公开
公开(公告)号：US20170169848A1
公开(公告)日：2017-06-15
申请号：US15441931
申请日：2017-02-24
申请人： HOYA CORPORATION
发明人： Masanori TAMAKI , Takeyoshi TAKAHASHI , Masaaki UEDA
IPC分类号： G11B5/82 , G11B5/84 , G11B5/73
CPC分类号： G11B5/82 , G11B5/7315 , G11B5/8404
摘要： A magnetic-disk glass substrate has a circular hole at a center, and includes a pair of main surfaces and a side wall surface orthogonal to the main surfaces. A roundness of the circular hole is 1.5 μm or less. A difference between a maximum value and a minimum value of radii of three inscribed circles that are respectively derived from outlines in the circumferential direction at three positions spaced apart by 200 μm in a substrate thickness direction on the side wall surface of the circular hole is 3.5 μm or less.

95. 发明授权

US09646640B2 Magnetic recording medium 有权
公开(公告)号：US09646640B2
公开(公告)日：2017-05-09
申请号：US15033951
申请日：2015-08-10
申请人： Fuji Electric Co., Ltd.
发明人： Akira Furuta , Shinji Uchida , Tomohiro Moriya , Hitoshi Nakata , Takehito Shimatsu
IPC分类号： G11B5/66 , G11B5/65 , G11B5/73
CPC分类号： G11B5/65 , G11B5/732
摘要： The purpose of the present invention is to provide a magnetic recording medium including a magnetic recording layer having more excellent magnetic properties and including an L10 type ordered alloy. One constitutional example of the magnetic recording medium includes a substrate, a first seed layer comprising ZnO, a second seed layer comprising MgO, and a magnetic recording layer comprising an ordered alloy, in this order.

96. 发明申请

US20170084305A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 审中-公开
公开(公告)号：US20170084305A1
公开(公告)日：2017-03-23
申请号：US15264988
申请日：2016-09-14
申请人： SHOWA DENKO K.K.
发明人： Eishin YAMAKAWA , Katsuaki TO , Saeko HAYASE
IPC分类号： G11B19/28 , G11B5/73 , G11B21/10
CPC分类号： G11B19/28 , G11B5/72 , G11B5/725 , G11B21/106
摘要： In a magnetic recording medium of the present invention, an outermost surface of a protective layer 3 on a lubricant layer 4 side contains carbon and nitrogen in a range of 50 atomic % to 90 atomic %, and the lubricant layer 4 is formed by being in contact with the outermost surface, contains compounds A to C represented in the below general formulas (1) to (3) described below, and has a film thickness of 0.5 nm to 2 nm. R1-C6H4OCH2CH(OH)CH2OCH2—R2-CH2OCH2CH(OH)CH2OH (1), CH2(OH)CH(OH)CH2OCH2CF2CF2(OCF2CF2CF2)mOCF2CF2CH2OCH2CH(OH)CH2OH (2), HOCH2CF2CF2O(CF2CF2CF2O)sCF2CF2CH2OCH2CH(OH)CH2OH (3)

97. 发明授权

US09595283B2 Glass substrate for magnetic disk and magnetic disk 有权
标题翻译：用于磁盘和磁盘的玻璃基板
公开(公告)号：US09595283B2
公开(公告)日：2017-03-14
申请号：US14652365
申请日：2013-12-27
申请人： Masanori Tamaki
发明人： Masanori Tamaki
IPC分类号： G11B5/73 , G11B5/82 , G11B5/84
CPC分类号： G11B5/7315 , G11B5/82 , G11B5/8404
摘要： 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 μm 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 μm or less.
摘要翻译：提供一种磁盘玻璃基板，其能够抑制磁盘的外周侧边缘部分附近的气流的紊流并抑制磁盘颤动。该磁盘玻璃基板包括一对主表面，形成在外周侧边缘表面上的侧壁表面和分别介于侧壁表面和主表面之间的倒角表面。侧壁表面的圆度为1.5μm以下。在包括磁盘玻璃基板的厚度方向的中心位置的多个位置处的侧壁面的多个轮廓的内切圆与外接圆之间的半径的差异在厚度方向为5μm以下。

98. 发明申请

US20170061999A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING AND REPRODUCING DEVICE 审中-公开
标题翻译：磁记录介质和磁记录和再现装置
公开(公告)号：US20170061999A1
公开(公告)日：2017-03-02
申请号：US15247182
申请日：2016-08-25
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Hirofumi SUTO , Kiwamu Kudo , Tazumi Nagasawa , Taro Kanao , Rie Sato , Koichi Mizushima
IPC分类号： G11B5/73
CPC分类号： G11B5/66 , G11B5/64
摘要： According to one embodiment, a magnetic recording medium includes a first magnetic layer and a second magnetic layer. An easy magnetization axis of the first magnetic layer is aligned with a first direction. The first direction is from the first magnetic layer toward the second magnetic layer. The second magnetic layer has magnetic anisotropy in a plane perpendicular to the first direction. A second magnetization of the second magnetic layer is reverse orientation of a first magnetization of the first magnetic layer.
摘要翻译：根据一个实施例，磁记录介质包括第一磁性层和第二磁性层。第一磁性层的易磁化轴与第一方向对准。第一方向是从第一磁性层朝向第二磁性层。第二磁性层在垂直于第一方向的平面内具有磁各向异性。第二磁性层的第二磁化强度是第一磁性层的第一磁化强度的反方向。

99. 发明授权

US09558777B2 Heat assisted magnetic recording (HAMR) media having a highly ordered crystalline structure 有权
标题翻译：具有高度有序晶体结构的热辅助磁记录（HAMR）介质
公开(公告)号：US09558777B2
公开(公告)日：2017-01-31
申请号：US14555496
申请日：2014-11-26
申请人： HGST Netherlands B.V.
发明人： Olav Hellwig , Shikha Jain , Oleksandr Mosendz , Hans J. Richter , Dieter K. Weller
IPC分类号： G11B5/66 , G11B5/73 , G11B5/65
CPC分类号： G11B5/66 , G11B5/65 , G11B5/732
摘要： According to one embodiment, a magnetic recording medium includes: a substrate, a seed layer positioned above the substrate, and a magnetic recording layer structure positioned above the seed layer. The magnetic recording layer structure includes: a first magnetic recording layer having a plurality of FePtCu magnetic grains and a first segregant, and a second magnetic recording layer positioned above the first magnetic recording layer, the second magnetic recording layer having a plurality of FePt magnetic grains and a second segregant, where a Curie temperature of the first magnetic recording layer is lower than a Curie temperature of the second magnetic recording layer.
摘要翻译：根据一个实施例，磁记录介质包括：衬底，位于衬底上方的种子层和位于种子层上方的磁记录层结构。磁记录层结构包括：具有多个FePtCu磁性颗粒和第一分离体的第一磁记录层和位于第一磁记录层上方的第二磁记录层，第二磁记录层具有多个FePt磁性颗粒以及第二分离器，其中第一磁记录层的居里温度低于第二磁记录层的居里温度。

100. 发明申请

US20160372147A1 MAGNETIC-DISK GLASS SUBSTRATE 审中-公开
标题翻译：磁盘玻璃基板
公开(公告)号：US20160372147A1
公开(公告)日：2016-12-22
申请号：US15122377
申请日：2015-03-31
申请人： HOYA CORPORATION
发明人： Shuhei AZUMA
IPC分类号： G11B5/73 , C03C15/00 , C03C21/00 , G11B5/82
CPC分类号： G11B5/7315 , B24B1/00 , B24B9/107 , B24B31/112 , C03C15/00 , C03C21/002 , C03C2214/08 , G11B5/82
摘要： An edge surface of a magnetic-disk glass substrate containing an alkali metal component as a glass composition is a mirror surface, and in a bearing ratio curve of roughness cross-sectional areas obtained by measuring a surface roughness of the edge surface obtained by etching the edge surface by 2.5 μm, a roughness percentage when a bearing ratio of a roughness cross-sectional area is 50% is 40% or more.
摘要翻译：含有作为玻璃组合物的碱金属成分的磁盘玻璃基板的边缘表面是镜面，并且在通过测量通过蚀刻所获得的边缘表面的表面粗糙度而获得的粗糙度横截面积的轴承比曲线边缘表面为2.5μm时，粗糙度横截面积的轴承比为50％时的粗糙度为40％以上。

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