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1.发明公开公开(公告)号：US20230306995A1
公开(公告)日：2023-09-28
申请号：US18187017
申请日：2023-03-21
申请人： FUJIFILM Corporation
发明人： Toshio TADA , Hiroyuki Suzuki , Megumi Nakano
摘要： The magnetic recording medium is used in a magnetic recording and reproducing device in which a reproduction bit size S is 40,000 nm2 or less, and a numerical value of a residual magnetic flux density Brvertical, which is expressed in a unit G, in a vertical direction of the magnetic recording medium is X or more. The X is a value calculated as X = -0.01S + 1550.
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公开(公告)号：US11767483B2
公开(公告)日：2023-09-26
申请号：US17274466
申请日：2019-08-28
申请人： SHOWA DENKO K.K.
IPC分类号： C10M107/38 , G11B5/725 , C08G65/22 , C08G65/331 , G11B5/72 , C10N40/18 , C10N50/08
CPC分类号： C10M107/38 , C08G65/226 , C08G65/331 , G11B5/7257 , G11B5/7266 , C10M2213/043 , C10N2040/18 , C10N2050/08
摘要： The fluorine-containing ether compound is represented by the following formula (1): R1—R2—CH2—R3—CH2—R4. In the formula (1), R1 is represented by the following formula (2), R2 is represented by the following formula (3), R3 is a perfluoropolyether chain, and R4 is an organic end group different from R1—R2— and contains two or three polar groups, wherein each polar group is bonded to a different carbon atom, and the carbon atoms to which the polar groups are bonded are bonded to one another via a linking group containing a carbon atom to which the polar group is not bonded. In the formula (2), R5 is an alkoxy group selected from the group consisting of a methoxy, an ethoxy and a propoxy group. In the formula (3), w is 2 or 3.
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3.发明授权公开(公告)号：US11514945B2
公开(公告)日：2022-11-29
申请号：US16489919
申请日：2018-02-20
申请人： SHOWA DENKO K.K.
发明人： Hiroyuki Tomita , Hiroko Hattori , Naoya Fukumoto , Ryuuta Miyasaka , Naoko Ito , Ichiro Ota , Katsumi Murofushi
IPC分类号： G11B5/84 , G11B5/72 , C08G65/332 , C08G65/333 , C10M107/38 , G11B5/725
摘要： A lubricant for a magnetic recording medium capable of forming a lubricant layer having excellent adhesion to a protective layer is provided. A lubricant for a magnetic recording medium contains a fluorine-containing ether compound in which a group having an ethylenic carbon-carbon double bond is disposed at one or both terminals of a perfluoroalkyl polyether chain. It is preferable that the group having the ethylenic carbon-carbon double bond is disposed at one terminal of the perfluoroalkyl polyether chain, and a hydroxyl group is disposed at other terminal. It is preferable that the lubricant for a magnetic recording medium contains a compound in which one or more functional groups selected from a hydroxyl group, an amino group, an amido group and a carboxyl group is disposed at one or both terminals of a perfluoroalkyl polyether chain.
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公开(公告)号：US11127429B2
公开(公告)日：2021-09-21
申请号：US16092949
申请日：2017-04-13
申请人： DIC Corporation
发明人： Akira Fukasawa , Toshiaki Adachi , Daisuke Yano
摘要： A problem to be solved by the present invention is to provide a magnetic recording medium having a jet-black magnetic stripe which is not tinged with red. The present invention is directed to a magnetic recording medium including: a magnetic recording layer on a substrate; and a protective layer (a) on the magnetic recording layer, wherein the protective layer (a) contains an aniline coloring material. The magnetic recording medium is advantageous in that the magnetic stripe is jet-black and has excellent design properties, and therefore can be widely used for credit cards, bank cards and the like.
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公开(公告)号：US20210090600A1
公开(公告)日：2021-03-25
申请号：US17022446
申请日：2020-09-16
申请人： FUJIFILM Corporation
发明人： Takuto KUROKAWA , Naoki SANO , Norihito KASADA , Eiki OZAWA , Megumi NAKANO
摘要： The magnetic recording medium includes a non-magnetic support; a magnetic layer that includes ferromagnetic powder on one surface side of the non-magnetic support; and a back coating layer that includes non-magnetic powder on the other surface side of the non-magnetic support, in which a difference between a spacing measured on a surface of the back coating layer by optical interferometry under a pressure of 0.5 atm after n-hexane cleaning and a spacing measured on the surface of the back coating layer by optical interferometry under a pressure of 13.5 atm after n-hexane cleaning is 3 nm or less.
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公开(公告)号：US20190392864A1
公开(公告)日：2019-12-26
申请号：US16017783
申请日：2018-06-25
摘要： A product, according to one embodiment, includes: a tape spool having: a first flange, a second flange, and a circular hub sandwiched between the first and second flanges. The tape spool also includes a cylindrical compliance layer which encircles the hub. The compliance layer is configured to dampen radial stress exerted on the hub by a tape wound around the hub. A product, according to another embodiment, includes: a tape cartridge having: an outer housing, and a tape spool positioned within the outer housing. The tape spool further includes: a first flange, a circular hub coupled to the first flange, and a cylindrical compliance layer which encircles the hub. A magnetic tape is also wrapped around the compliance layer and the hub. Moreover, the compliance layer is configured to dampen radial stress exerted on inner wraps of the magnetic tape.
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公开(公告)号：US20190304494A1
公开(公告)日：2019-10-03
申请号：US16447706
申请日：2019-06-20
发明人： Robert G. Biskeborn , Calvin S. Lo
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.
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公开(公告)号：US09916848B2
公开(公告)日：2018-03-13
申请号：US15437105
申请日：2017-02-20
发明人： Icko E. T. Iben , Lee C. Randall
CPC分类号： G11B5/722 , G11B5/00813 , G11B5/00817 , G11B5/1278 , G11B5/3106 , G11B5/314 , G11B5/40 , G11B33/14
摘要： A method includes identifying a microelectronic device located at an air bearing surface and a resistive heating element, said resistive heating element electrically isolated from the microelectronic device. The method further includes applying a bias current through the resistive heating element to generate localized heat and heating the microelectronic device by the localized heat. In an aspect, the method further includes identifying a predetermined humidity threshold, identifying a separation distance between the microelectronic device and the resistive heating element in at least one dimension, determining an effective temperature for which relative humidity at that region of the air bearing surface where the microelectronic device is located is reduced below the predetermined humidity threshold, and adjusting the bias current such that the microelectronic device is heated at least to the effective temperature.
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公开(公告)号：US09558776B1
公开(公告)日：2017-01-31
申请号：US14967073
申请日：2015-12-11
发明人： Robert G. Biskeborn , Gary M. Decad , Calvin S. Lo
CPC分类号： G11B5/722 , G11B5/70621
摘要： A product such as a magnetic recording tape, according to one embodiment, includes a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and an at least partially polycrystalline coating above the magnetic recording layer. A product according to another embodiment includes a flexible magnetic media having a substrate, a magnetic recording layer having cobalt therein, and coating above the magnetic recording layer. The coating includes a ceramic material.
摘要翻译： 根据一个实施例的诸如磁记录带的产品包括具有基底的柔性磁性介质，其中具有钴的磁记录层和在磁记录层上方的至少部分多晶的涂层。 根据另一实施例的产品包括具有基底的柔性磁性介质，其中具有钴的磁记录层和在磁记录层上方的涂层。 涂层包括陶瓷材料。
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公开(公告)号：US09478244B2
公开(公告)日：2016-10-25
申请号：US14486397
申请日：2014-09-15
发明人： Robert W. Carpick , Kumar Sridharan
IPC分类号： G11B5/66 , G11B5/72 , C23C14/06 , C23C14/32 , C23C14/34 , C23C14/48 , C23C16/32 , C23C16/448 , C23C16/50 , G11B5/84 , C23C16/30
CPC分类号： G11B5/722 , C23C14/0635 , C23C14/325 , C23C14/34 , C23C14/48 , C23C16/30 , C23C16/32 , C23C16/448 , C23C16/50 , G11B5/8408
摘要： A method of protecting a magnetic information storage medium is described. The method includes fabricating a film over a surface of the magnetic information storage medium. The film includes an amorphous, uniform, homogeneous solid solution of carbon, hydrogen, silicon, and oxygen. A magnetic storage medium with such a protective film is described.
摘要翻译： 描述了一种保护磁信息存储介质的方法。 该方法包括在磁信息存储介质的表面上制造薄膜。 该膜包括碳，氢，硅和氧的无定形均匀的均匀固溶体。 描述了具有这种保护膜的磁存储介质。
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