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1. 发明授权

US11302353B2 Magnetic recording medium having controlled dimensional variation 有权
公开(公告)号：US11302353B2
公开(公告)日：2022-04-12
申请号：US17018750
申请日：2020-09-11
申请人： Sony Corporation
发明人： Minoru Yamaga , Noboru Sekiguchi
IPC分类号： G11B5/706 , G11B5/733 , G11B5/735 , G11B5/62 , G11B5/584
摘要： In a magnetic recording medium, an average thickness tT is tT≤5.5 μm, a dimensional variation Δw in a width direction to tension change in a longitudinal direction is 650 ppm/N≤Δw, and a rate of shrinkage in the longitudinal direction is 0.08% or less.

2. 发明授权

US11087793B2 Magnetic tape with particular refractive index characteristics, magnetic tape cartridge, and magnetic tape apparatus 有权
$Magnetic tape with particular refractive index characteristics, magnetic tape cartridge, and magnetic tape apparatus$
公开(公告)号：US11087793B2
公开(公告)日：2021-08-10
申请号：US16727181
申请日：2019-12-26
申请人： FUJIFILM Corporation
发明人： Norihito Kasada
IPC分类号： G11B5/62 , G11B5/74 , G11B5/735 , G11B23/107 , G11B5/706 , G11B5/596 , G11B5/70
摘要： Provided are a magnetic tape including: a non-magnetic support; and a magnetic layer including ferromagnetic powder and a binding agent on the non-magnetic support, in which a total thickness of the magnetic tape is equal to or smaller than 5.30 μm, the magnetic layer has a servo pattern, a center line average surface roughness Ra measured on a surface of the magnetic layer is equal to or smaller than 1.8 nm, and an absolute value ΔN of a difference between a refractive index Nxy of the magnetic layer, measured in an in-plane direction and a refractive index Nz of the magnetic layer, measured in a thickness direction is 0.25 to 0.40, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape, a magnetic tape cartridge and a magnetic tape apparatus including this magnetic tape.

3. 发明申请

US20210012798A1 MAGNETIC RECORDING MEDIUM 有权
公开(公告)号：US20210012798A1
公开(公告)日：2021-01-14
申请号：US17032725
申请日：2020-09-25
申请人： SONY CORPORATION
发明人： Masaru TERAKAWA , Minoru YAMAGA
IPC分类号： G11B5/62 , G11B5/733 , G11B5/706
摘要： A magnetic recording medium is provided and includes a layer structure including a magnetic layer, a non-magnetic layer, and a base layer in this order, in which an average thickness tT of the magnetic recording medium is 3.5 μm≤tT≤5.3 μm, a dimensional variation Δw in a width direction of the magnetic recording medium to tension change in a longitudinal direction of the magnetic recording medium is 700 ppm/N≤Δw≤2000 ppm/N, and an average thickness tn of the non-magnetic layer is tn≤1.0 μm.

4. 发明授权

US09299377B2 Storage medium for storing data and servo information 有权
标题翻译：用于存储数据和伺服信息的存储介质
公开(公告)号：US09299377B2
公开(公告)日：2016-03-29
申请号：US14684731
申请日：2015-04-13
申请人： Marvell International LTD.
发明人： Zhimin Yuan , Bo Liu , Jiangzhong Shi , Weidong Zhou
IPC分类号： G11B5/82 , G11B3/70 , G11B5/66 , G11B5/02 , G11B5/62 , G11B5/84 , G11B5/29 , G11B5/596 , G11B5/73 , G11B5/09 , G11B5/48 , G11B5/00
CPC分类号： G11B5/66 , G11B5/02 , G11B5/09 , G11B5/29 , G11B5/4813 , G11B5/59638 , G11B5/62 , G11B5/7325 , G11B5/82 , G11B5/84 , G11B5/8408 , G11B2005/0021
摘要： A storage medium including a servo layer, a data recording layer, a heat sink layer, and a diamond-like carbon layer with a lubricant covering. The servo layer is configured to store servo information on the storage medium. The servo information is used to position a read/write head over the storage medium during a read/write operation performed by the read/write head on the storage medium. The data recording layer is configured to store data on the storage medium during the read/write operation performed by the read/write head on the storage medium. The heat sink layer is disposed between the servo layer and the data recording layer. The diamond-like carbon layer with the lubricant covering is disposed above the data recording layer.
摘要翻译：包括伺服层，数据记录层，散热层和具有润滑剂覆盖层的类金刚石碳层的存储介质。伺服层被配置为在存储介质上存储伺服信息。伺服信息用于在由读/写头在存储介质上执行的读/写操作期间将读/写头定位在存储介质上。数据记录层被配置为在由读/写头在存储介质上执行的读/写操作期间将数据存储在存储介质上。散热层设置在伺服层和数据记录层之间。具有润滑剂覆盖层的菱形碳层设置在数据记录层的上方。

5. 发明授权

US08824248B2 Glass for magnetic recording medium substrate and usage thereof 有权
标题翻译：磁记录介质基板用玻璃及其用途
公开(公告)号：US08824248B2
公开(公告)日：2014-09-02
申请号：US13890866
申请日：2013-05-09
申请人： Naomi Matsumoto , Kazuaki Hashimoto
发明人： Naomi Matsumoto , Kazuaki Hashimoto
IPC分类号： G11B11/00 , G11B5/62
CPC分类号： G11B5/7315 , C03C3/085 , C03C3/087 , C03C17/06 , C03C21/00 , C03C21/002 , G11B5/73 , G11B5/8404 , G11B13/04 , G11B2005/0021
摘要： An aspect of the present invention relates to glass for a magnetic recording medium substrate, which includes essential components in the form of SiO2, Li2O, Na2O, and one or more alkaline earth metal oxides selected from the group consisting of MgO, CaO, SrO, and BaO, wherein a molar ratio of a content of MgO to a combined content of MgO, CaO, SrO, and BaO (MgO/(MgO+CaO+SrO+BaO)) is equal to or greater than 0.80, and which has a Young's modulus of equal to or greater than 80 GPa, and a glass transition temperature of equal to or greater than 620° C.
摘要翻译：本发明的一个方面涉及一种用于磁记录介质基板的玻璃，其包括SiO 2，Li 2 O，Na 2 O以及一种或多种选自MgO，CaO，SrO等的一种或多种碱土金属氧化物的主要成分，和BaO，其中MgO的含量与MgO，CaO，SrO和BaO（MgO /（MgO + CaO + SrO + BaO）的组合含量）的摩尔比等于或大于0.80，并且具有杨氏模量等于或大于80GPa，玻璃化转变温度等于或大于620℃。

6. 发明申请

US20140099518A1 LUBRICANTS FOR DATA STORAGE 有权
标题翻译：用于数据存储的润滑剂
公开(公告)号：US20140099518A1
公开(公告)日：2014-04-10
申请号：US13645672
申请日：2012-10-05
申请人： SSEAGATE TECHNOLOGY LLC
发明人： Xiaoping Yan , Michael Stirniman , Qian Guo , Wenhong Liu
IPC分类号： G11B5/725 , C07D403/14 , G11B5/62 , C07D251/30
CPC分类号： C07D251/30 , C07D403/14 , G11B5/725
摘要： Disclosed herein are compounds of formula I: X-(L-Z)p-L-R[L-(Z-L)p-Y]q (I) wherein L is a perfluoropolyether; R is q can be an integer equal to or greater than 1; p can independently be integers from 0 to 7; X and Y can independently be chosen from: —OH, —CH2CH2OH, CH2CH2OCH2CH2OH, —CH2CH(OH)CH2OH, —C6H5, —CH2C6H5, —CH2CH(OH)CH3, F, —CF3, —CF2CF3, piperonyl, triazine, benzotriazole, and derivatives thereof; and Z, if present, can independently be chosen from: —C6H4—, —CH2C6H4CH2—, —CH2CH(OH)CH2—, —CH2CH(OH)CH2CH(OH)CH2—, —CH(OH)CH(OH)CH2—, —CH(CH2OH)—, or —CH(C6H5)—.
摘要翻译：本文公开的是式I的化合物：X-（L-Z）p-L-R [L-（Z-L）p-Y] q（I）其中L是全氟聚醚; R是q可以是等于或大于1的整数; p可以独立地为0〜7的整数; X和Y可以独立地选自：-OH，-CH2CH2OH，CH2CH2OCH2CH2OH，-CH2CH（OH）CH2OH，-C6H5，-CH2C6H5，-CH2CH（OH）CH3，F，-CF3，-CF2CF3，胡椒基，三嗪，苯并三唑及其衍生物; 可以独立地选自：-C 6 H 4 - ， - CH 2 C 6 H 4 CH 2 - ， - CH 2 CH（OH）CH 2 - ， - CH 2 CH（OH）CH 2 CH（OH）CH 2 - ， - CH（OH）CH - ， - CH（CH 2 OH） - 或-CH（C 6 H 5） - 。

7. 发明授权

US08455118B2 Composite soft underlayer including negative anisotropy material 有权
标题翻译：复合软底层包括负向各向异性材料
公开(公告)号：US08455118B2
公开(公告)日：2013-06-04
申请号：US12872865
申请日：2010-08-31
申请人： Kai-Chieh Chang , Li Tang , Shanghsien S. Rou , Connie Chunling Liu , Bogdan Florin Valcu , Wen Jiang , Tao Zhang
发明人： Kai-Chieh Chang , Li Tang , Shanghsien S. Rou , Connie Chunling Liu , Bogdan Florin Valcu , Wen Jiang , Tao Zhang
IPC分类号： G11B5/62 , G11B5/667
CPC分类号： G11B5/667
摘要： An apparatus may include a composite soft underlayer and a perpendicular magnetic recording layer overlying the composite soft underlayer. The composite soft underlayer may include a growth template layer, a negative magnetic anisotropy layer overlying the growth template layer, and a magnetically soft layer overlying the negative magnetic anisotropy layer. In some embodiments, the negative magnetic anisotropy layer includes a plurality of grains, and substantially all the grains have negative magnetic anisotropy along an axis substantially perpendicular to a major plane of the composite soft underlayer. In some embodiments, the negative magnetic anisotropy layer includes a thickness of less than or equal to about 3 nm.
摘要翻译：装置可以包括复合软底层和覆盖复合软底层的垂直磁记录层。复合软底层可以包括生长模板层，覆盖生长模板层的负磁各向异性层和覆盖负磁各向异性层的磁软层。在一些实施例中，负磁各向异性层包括多个晶粒，并且基本上所有的晶粒沿着基本上垂直于复合软底层的主平面的轴线具有负的磁各向异性。在一些实施例中，负磁各向异性层包括小于或等于约3nm的厚度。

8. 发明授权

US08402790B2 Process for producing glass substrate for information recording medium 有权
标题翻译：信息记录媒体用玻璃基板的制造方法
公开(公告)号：US08402790B2
公开(公告)日：2013-03-26
申请号：US12909423
申请日：2010-10-21
申请人： Jun Endo , Tetsuya Nakashima
发明人： Jun Endo , Tetsuya Nakashima
IPC分类号： G11B5/84 , C03B25/00 , G11B5/62
CPC分类号： G11B5/8404 , C03B25/025 , G11B5/7315
摘要： To provide a process to improve acid resistance of a glass substrate for an information recording medium.A process for producing a glass substrate for an information recording medium, comprising processing a glass formed into a plate by a float process, a down-draw method or a press method, wherein, in cooling of the glass in the last step where the glass has a temperature of at least its strain point, the time during which the glass temperature is at least its strain point and at most a temperature where the glass viscosity is 1010 dPa·s is at least 13 minutes.
摘要翻译：提供一种提高信息记录介质的玻璃基板耐酸性的方法。一种用于信息记录介质的玻璃基板的制造方法，其特征在于，包括通过浮法加工形成为板的玻璃，下拉法或压制法，其中在玻璃的最后工序中，玻璃的冷却具有至少应变点的温度，玻璃温度至少为其应变点的时间和玻璃粘度为1010dPa·s以下的温度为至少13分钟。

9. 发明授权

US08167685B2 Method of manufacturing a perpendicular magnetic recording medium, a method of manufacturing a substrate for a perpendicular magnetic recording medium, and a medium and a substrate manufactured by the methods 有权
标题翻译：垂直磁记录介质的制造方法，垂直磁记录介质用基板的制造方法以及由该方法制造的介质和基板
公开(公告)号：US08167685B2
公开(公告)日：2012-05-01
申请号：US11925333
申请日：2007-10-26
申请人： Shoji Sakaguchi , Hiroyuki Nakamura , Hideki Matsuo
发明人： Shoji Sakaguchi , Hiroyuki Nakamura , Hideki Matsuo
IPC分类号： B24B1/00 , G11B5/62 , G11B7/24
CPC分类号： G11B5/8404 , B24B19/028 , B24B21/004
摘要： A method of manufacturing a perpendicular magnetic recording medium and a substrate for the medium are disclosed, in which abnormal protrusions on an underlayer made of a Ni—P alloy are automatically eliminated while maintaining a flat surface with high accuracy on the underlayer, and appropriate texture traces remain to promote magnetization alignment in the vertical direction in a perpendicular magnetic recording medium without adversely affecting the magnetization alignment. In the method, texture processing is carried out on an underlayer made of a Ni—P alloy on a nonmagnetic base plate using a polishing tape while supplying mixed slurry of a surfactant and abrasive grains of polycrystalline diamond, and then, texture polishing is carried out on the underlayer processed by the texture processing, using a polishing tape while supplying slurry containing an abrasive material and an organic acid until the surface of the underlayer is polished to an arithmetic mean roughness Ra of at most 0.5 nm, preferably in the range of 0.05 nm to 0.2 nm.
摘要翻译：公开了制造用于介质的垂直磁记录介质和基板的方法，其中在Ni-P合金制成的底层上的异常突起被自动消除，同时在底层上保持高精度的平坦表面，并且具有适当的质地留下痕迹以促进垂直磁记录介质中的垂直方向的磁化取向，而不会不利地影响磁化取向。在该方法中，使用研磨带在非磁性基板上由Ni-P合金制成的底层进行纹理加工，同时供给表面活性剂和多晶金刚石的磨粒的混合浆料，然后进行织构研磨在通过纹理处理处理的底层上，使用抛光带，同时供给含有研磨材料和有机酸的浆料，直到底层的表面被抛光至至多0.5nm的算术平均粗糙度Ra，优选在0.05的范围内 nm至0.2nm。

10. 发明授权

US08153284B2 Method for fabricating a glass substrate, method for fabricating a magnetic disk, and magnetic disk 有权
标题翻译：玻璃基板的制造方法，磁盘的制造方法以及磁盘
公开(公告)号：US08153284B2
公开(公告)日：2012-04-10
申请号：US11825784
申请日：2007-07-09
申请人： Hideki Kawai
发明人： Hideki Kawai
IPC分类号： G11B5/62 , B24B1/00 , C03C15/00
CPC分类号： G11B5/8404 , C03C19/00 , C03C23/0075
摘要： A method for manufacturing a glass substrate which has a uniform and minute pattern of stripes formed on the surface thereof by ultraprecision polishing, and which allows the recording capacity of a magnetic disk to be increased, includes an inspecting step before the glass substrate is subjected to ultraprecision polishing, whether the Young's modulus Es in topmost part as determined by the nanoindentation method and the Young's modulus Eg as determined by ultrasonic resonance fulfill the inequality 0.8 Eg
摘要翻译：一种通过超精密抛光在其表面上形成均匀且细微的条状图案的玻璃基板的制造方法，其特征在于，具备允许提高磁盘的记录容量的玻璃基板的制造方法，超精密抛光，通过纳米压痕法确定的最大部分的杨氏模量Es和通过超声共振确定的杨氏模量Eg是否满足不等式0.8Eg

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