公开(公告)号：US20200005824A1

公开(公告)日：2020-01-02

申请号：US16489919

申请日：2018-02-20

Applicant: SHOWA DENKO K.K.

Inventor： Hiroyuki TOMITA ,  Hiroko HATTORI ,  Naoya FUKUMOTO ,  Ryuuta MIYASAKA ,  Naoko ITO ,  Ichiro OTA ,  Katsumi MUROFUSHI

IPC: G11B5/84 ,  G11B5/725 ,  C08G65/333 ,  C08G65/332 ,  C10M107/38

Abstract: 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.

公开(公告)号：US20140242268A1

公开(公告)日：2014-08-28

申请号：US14171937

申请日：2014-02-04

Applicant: SHOWA DENKO K.K.

Inventor： Ichiro OTA

IPC: H01F41/14

CPC classification number: G11B5/8408 ,  H01F41/308

Abstract: A method of fabricating a magnetic recording medium sequentially forms a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body. The lubricant layer is formed on a surface of the protection layer by vapor-phase lubrication without exposing the stacked body to atmosphere after forming the protection layer on the stacked body. Nitrogen atoms or oxygen atoms are injected onto the surface of the protection layer after forming the protection layer and before forming the lubricant layer.

Abstract translation: 制造磁记录介质的方法在层叠体上依次形成磁记录层，保护层和润滑层。 通过气相润滑在保护层的表面上形成润滑剂层，而不在层叠体上形成保护层后将层叠体暴露在大气中。 在形成保护层之后并在形成润滑剂层之前，将氮原子或氧原子注入到保护层的表面上。

公开(公告)号：US20200010619A1

公开(公告)日：2020-01-09

申请号：US16489931

申请日：2018-02-06

Applicant: SHOWA DENKO K.K.

Inventor： Takuya MINAMI ,  Yoshishige OKUNO ,  Yuta YAMAGUCHI ,  Ryuuta MIYASAKA ,  Naoya FUKUMOTO ,  Hiroko HATTORI ,  Hiroyuki TOMITA ,  Michio SERI ,  Naoko ITO ,  Ichiro OTA ,  Katsumi MUROFUSHI

IPC: C08G65/331 ,  G11B5/725 ,  C10M107/38 ,  C08G65/333

Abstract: A fluorine-containing ether compound of the present invention is represented by the following General Formula (1). (In the General Formula (1), X is a trivalent atom or a trivalent atom group, A is a linking group including at least one polar group, B is a linking group having a perfluoropolyether chain, and D is a polar group or a substituent having a polar group at the end.) [Chem. 1] XA-B-D)3   (1)

公开(公告)号：US20140139946A1

公开(公告)日：2014-05-22

申请号：US14079224

申请日：2013-11-13

Applicant: SHOWA DENKO K.K.

Inventor： Ichiro OTA

IPC: G11B5/725

CPC classification number: G11B5/725

Abstract: Disclosed is a magnetic recording medium having at minimum a magnetic layer, a protective layer and a lubricant agent layer on a non-magnetic substrate in sequential order, in which the protective layer is formed of carbon or silicon carbide, the lubricant agent layer is formed by being in contact with the protective layer, contains compound A shown in the below general formula (1) and compound B, in which the mass ratio (A/B) of the compound A with respect to the compound B is in the range of 0.05 to 0.9 and the average film thickness of the lubricant agent layer is 0.8 nm to 2 nm.

Abstract translation: 公开了一种在非磁性基板上依次具有至少一层磁性层，保护层和润滑剂层的磁记录介质，其中保护层由碳或碳化硅形成，形成润滑剂层 通过与保护层接触，含有下列通式（1）所示的化合物A和化合物B，其中化合物A相对于化合物B的质量比（A / B）在 0.05〜0.9，润滑剂层的平均膜厚为0.8nm〜2nm。

公开(公告)号：US20200263104A1

公开(公告)日：2020-08-20

申请号：US15999837

申请日：2017-02-20

Applicant: SHOWA DENKO K.K.

Inventor： Yuta YAMAGUCHI ,  Naoya FUKUMOTO ,  Naoko ITO ,  Hiroyuki TOMITA ,  Ichiro OTA ,  Katsumi MUROFUSHI

IPC: C10M105/54 ,  C07C43/13 ,  G11B5/725

Abstract: A fluorine-containing ether compound represented by a formula (1) shown below. R4—CH2—R3—CH2—R2—CH2—R1—CH2—R2—CH2—R3—CH2—R5  (1) In formula (1), R1 and R3 represent the same or different perfluoropolyether chains, R2 represents a linking group containing at least one polar group, one or both of R4 and R5 represent a terminal group containing two or more polar groups, and R4 and R5 are different.

公开(公告)号：US20190084911A1

公开(公告)日：2019-03-21

申请号：US16082349

申请日：2017-01-30

Applicant: SHOWA DENKO K.K.

Inventor： Daisuke YAGYU ,  Yuta YAMAGUCHI ,  Naoya FUKUMOTO ,  Tsuyoshi KATO ,  Shoko UETAKE ,  Hiroyuki TOMITA ,  Ryuuta MIYASAKA ,  Naoko ITO ,  Ichiro OTA ,  Katsumi MUROFUSHI

IPC: C07C43/23 ,  C07C43/178 ,  C07D333/16 ,  C07D303/26 ,  C07D409/12 ,  C07D277/24 ,  C10M105/54 ,  G11B5/733

Abstract: The present invention relates to a fluorine-containing ether compound represented by Formula (1), R1—R2—CH2—R3—CH2—R4  (1). (In Formula (1), R1 is an end group including an organic group having at least one double bond or triple bond, R2 is a divalent linking group bonded to R1 by etheric oxygen, R3 is a perfluoropolyether chain, R4 is an end group having two or three polar groups with each polar group being bonded to different carbon atoms, and the carbon atoms, to which the polar groups are bonded, being bonded to each other via a linking group including carbon atoms to which the polar groups are not bonded.)

公开(公告)号：US20150187381A1

公开(公告)日：2015-07-02

申请号：US14575385

申请日：2014-12-18

Applicant: SHOWA DENKO K.K.

Inventor： Ichiro OTA

IPC: G11B5/84 ,  C23C16/44 ,  C23C16/26

CPC classification number: G11B5/8408 ,  C23C14/0605 ,  C23C14/221 ,  C23C16/272 ,  H01J37/32018 ,  H01J37/3266

Abstract: A carbon film forming method, that introduces a raw material gas including carbon into a film forming chamber, ionizes the gas by using an ion source, accelerates the ionized gas, and radiates the ionized gas to a surface of a substrate to form a carbon film on the surface of the substrate, includes forming the carbon film while rotating a first magnet, which is provided on the opposite side of the substrate across a region in which the raw material gas is ionized so as to be eccentric and/or inclined with respect to a central axis connecting the center of the ion source and a position corresponding to the center of the substrate held by the holder, in a circumferential direction.

Abstract translation: 将包含碳的原料气体引入成膜室的碳膜形成方法通过使用离子源对气体进行离子化，加速电离气体，并将离子化的气体照射到基板的表面，形成碳膜 在基板的表面上，包括在旋转第一磁体的同时旋转形成碳膜，该第一磁体设置在基板的相对侧上跨越原料气体被离子化的区域，以偏心和/或倾斜 连接到离子源的中心的中心轴线和与保持器保持的基板的中心对应的位置。

公开(公告)号：US20150170698A1

公开(公告)日：2015-06-18

申请号：US14566105

申请日：2014-12-10

Applicant: SHOWA DENKO K.K.

Inventor： Ichiro OTA

IPC: G11B5/84 ,  C23C14/06 ,  H01J37/32 ,  C23C14/22

CPC classification number: H01J37/32541 ,  C23C14/0605 ,  C23C14/221 ,  G11B5/8408 ,  H01J37/32357 ,  H01J37/32422 ,  H01J37/32568 ,  H01J37/32669

Abstract: A carbon film-forming apparatus includes a film forming chamber, a holder that can hold a substrate in the film forming chamber, an introduction pipe that introduces a raw material gas including carbon to the film forming chamber, an ion source that radiates an ion beam to the substrate held by the holder, and a tubular electrode that is provided in an ion acceleration region between the ion source and the holder so as to surround a central axis that connects the center of the ion source and a position corresponding to the center of the substrate held by the holder.

Abstract translation: 碳膜形成装置包括成膜室，能够在成膜室内保持基板的保持器，将包含碳的原料气体引入成膜室的导入管，将离子束 到由保持器保持的基板和管状电极，其设置在离子源和保持器之间的离子加速区域中，以围绕连接离子源的中心的中心轴线和与离子源的中心相对应的位置 由保持器保持的基板。