公开(公告)号：US20220228272A1

公开(公告)日：2022-07-21

申请号：US17595964

申请日：2020-12-11

Applicant: SHOWA DENKO K.K.

Inventor： Katsuaki TO ,  Yohsuke FUKUCHI ,  Hiroshi KOBAYASHI

IPC: C25B1/245 ,  C25B15/023 ,  C25B11/043 ,  C25B9/17

Abstract: A method for producing fluorine gas including electrolyzing an electrolyte in an electrolytic cell, measuring the current efficiency of fluorine gas production in the electrolyzing, and sending a fluid generated in the inside of the electrolytic cell in the electrolyzing the electrolyte, from the inside to the outside of the electrolytic cell through a flow path. In the sending, the flow path in which the fluid flows is switched in accordance with the current efficiency measured in the measuring the current efficiency, such that the fluid is sent to a first flow path that sends the fluid to a first outside when the current efficiency measured in the measuring the current efficiency is not less than a predetermined reference value, or the fluid is sent to a second flow path that sends the fluid to a second outside when the current efficiency is less than the predetermined reference value.

公开(公告)号：US20190295583A1

公开(公告)日：2019-09-26

申请号：US16279143

申请日：2019-02-19

Applicant: SHOWA DENKO K.K.

Inventor： Kota HASEGAWA ,  Katsuaki TO

IPC: G11B5/667 ,  G11B5/706 ,  C23C16/505 ,  C23C16/28 ,  C22C19/07

Abstract: A magnetic recording medium includes a nonmagnetic substrate, a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protection layer that are arranged in this order. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer that are arranged in this order on the orientation control layer. The first magnetic layer has a granular structure including an oxide at grain boundary parts of magnetic grains, and the second magnetic layer is closest to the protection layer among layers within the perpendicular magnetic layer, and includes magnetic grains made of a CoCrPt alloy, and a nitride of carbon or a hydride of carbon.

公开(公告)号：US20170084305A1

公开(公告)日：2017-03-23

申请号：US15264988

申请日：2016-09-14

Applicant: SHOWA DENKO K.K.

Inventor： Eishin YAMAKAWA ,  Katsuaki TO ,  Saeko HAYASE

IPC: G11B19/28 ,  G11B5/73 ,  G11B21/10

CPC classification number: G11B19/28 ,  G11B5/72 ,  G11B5/725 ,  G11B21/106

Abstract: 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)

公开(公告)号：US20210098017A1

公开(公告)日：2021-04-01

申请号：US16953894

申请日：2020-11-20

Applicant: SHOWA DENKO K.K.

Inventor： Kota HASEGAWA ,  Katsuaki TO

IPC: G11B5/667 ,  G11B5/706 ,  C23C16/28 ,  C22C19/07 ,  C23C16/505 ,  G11B5/65 ,  G11B5/66

Abstract: A magnetic recording medium includes a nonmagnetic substrate, a soft magnetic underlayer, an orientation control layer, a perpendicular magnetic layer, and a protection layer that are arranged in this order. The perpendicular magnetic layer includes a first magnetic layer and a second magnetic layer that are arranged in this order on the orientation control layer. The first magnetic layer has a granular structure including an oxide at grain boundary parts of magnetic grains, and the second magnetic layer is closest to the protection layer among layers within the perpendicular magnetic layer, and includes magnetic grains made of a CoCrPt alloy, and a nitride of carbon or a hydride of carbon.

公开(公告)号：US20150332724A1

公开(公告)日：2015-11-19

申请号：US14810611

申请日：2015-07-28

Applicant: SHOWA DENKO K.K.

Inventor： Takehiko OKABE ,  Katsuaki TO

IPC: G11B5/84 ,  G11B5/85

CPC classification number: G11B5/8408 ,  G11B5/85

Abstract: A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant on the stacked body after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere. The first lubricant has a lower molecular mass and a higher chemical polarity than those of the second lubricant.

Abstract translation: 通过在层叠体上依次形成磁记录层，保护层和润滑层来制造磁记录介质的方法包括：在形成保护层之后，通过蒸镀形成保护层，在第一润滑剂上形成润滑剂 在不将层叠体暴露在大气中的同时润滑沉积，以及在沉积第一种润滑剂之后，通过气相润滑沉积而在层叠体上沉积第二种润滑剂，而不将堆叠体暴露在大气中。 第一润滑剂具有比第二润滑剂低的分子量和更高的化学极性。

公开(公告)号：US20140295072A1

公开(公告)日：2014-10-02

申请号：US14210956

申请日：2014-03-14

Applicant: SHOWA DENKO K.K.

Inventor： Takehiko OKABE ,  Katsuaki TO

IPC: G11B5/84

CPC classification number: G11B5/8408 ,  G11B5/85

Abstract: A method of fabricating a magnetic recording medium includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant that is dissolved in an organic solvent onto the stacked body after depositing the first lubricant. A molecular mass of a compound included in the first lubricant is higher than that of the second lubricant, and a chemical polarity of the compound included in the first lubricant is lower than that of the second lubricant.

Abstract translation: 一种制造磁记录介质的方法包括：在形成保护层之后，通过气相润滑沉积在堆叠体上沉积第一润滑剂而不使层叠体暴露在大气中而形成润滑剂，并沉积溶解的第二润滑剂 在有机溶剂中沉积第一种润滑剂后在堆叠体上。 包含在第一润滑剂中的化合物的分子量高于第二润滑剂的分子量，并且包含在第一润滑剂中的化合物的化学极性低于第二润滑剂的化学极性。

公开(公告)号：US20140212577A1

公开(公告)日：2014-07-31

申请号：US14148931

申请日：2014-01-07

Applicant: SHOWA DENKO K.K.

Inventor： Takehiko OKABE ,  Katsuaki TO

IPC: G11B5/84

CPC classification number: G11B5/8408

Abstract: A method of fabricating a magnetic recording medium by sequentially forming a magnetic recording layer, a protection layer, and a lubricant layer on a stacked body, includes forming the lubricant by depositing a first lubricant on the stacked body after forming the protection layer, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere, and depositing a second lubricant on the stacked body after depositing the first lubricant, by vapor-phase lubrication deposition, without exposing the stacked body to atmosphere.

Abstract translation: 通过在层叠体上依次形成磁记录层，保护层和润滑层来制造磁记录介质的方法包括：在形成保护层之后，通过蒸镀形成保护层，在第一润滑剂上形成润滑剂 在不将层叠体暴露在大气中的同时润滑沉积，以及在沉积第一种润滑剂之后，通过气相润滑沉积而在层叠体上沉积第二种润滑剂，而不将堆叠体暴露在大气中。