公开(公告)号：US20230306995A1

公开(公告)日：2023-09-28

申请号：US18187017

申请日：2023-03-21

Applicant: FUJIFILM Corporation

Inventor： Toshio TADA ,  Hiroyuki Suzuki ,  Megumi Nakano

IPC: G11B5/708 ,  G11B5/72 ,  G11B5/78

CPC classification number: G11B5/708 ,  G11B5/72 ,  G11B5/78

Abstract: 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.

公开(公告)号：US09728218B2

公开(公告)日：2017-08-08

申请号：US14484829

申请日：2014-09-12

Applicant: FUJI ELECTRIC CO., LTD.

Inventor： Shinji Uchida

IPC: G11B5/73 ,  G11B5/65 ,  G11B5/66 ,  G11B5/74 ,  G11B5/708 ,  G11B5/00

CPC classification number: G11B5/7325 ,  G11B5/65 ,  G11B5/66 ,  G11B5/708 ,  G11B5/743 ,  G11B2005/0021

Abstract: 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.

公开(公告)号：US20120279712A1

公开(公告)日：2012-11-08

申请号：US13515513

申请日：2010-12-14

Applicant: Peter Rogin ,  Peter William de Oliveira ,  Christian Wühr ,  Michael Veith ,  Douglas Espin

Inventor： Peter Rogin ,  Peter William de Oliveira ,  Christian Wühr ,  Michael Veith ,  Douglas Espin

IPC: E21B43/24 ,  H01F41/00 ,  H05B6/02 ,  C09K8/80

CPC classification number: B82Y25/00 ,  B03C1/01 ,  B03C1/28 ,  B03C2201/18 ,  C01G49/0018 ,  C01G49/0036 ,  C01P2006/42 ,  C09C1/22 ,  C09K8/805 ,  G11B5/708 ,  H01F1/24 ,  Y10T428/25 ,  Y10T428/2982 ,  Y10T428/32

Abstract: Magnetic composite particles can be used as proppants and allow for deliberate heating by applying an alternating magnetic field.

Abstract translation: 磁性复合颗粒可用作支撑剂，并允许通过施加交变磁场进行故意加热。

公开(公告)号：US20100323222A1

公开(公告)日：2010-12-23

申请号：US12815678

申请日：2010-06-15

Applicant: Eiji Nakashio ,  Futoshi Sasaki ,  Katsunori Maeshima ,  Yusuke Tamakawa ,  Kuniko Yamamoto ,  Minoru Yamaga

Inventor： Eiji Nakashio ,  Futoshi Sasaki ,  Katsunori Maeshima ,  Yusuke Tamakawa ,  Kuniko Yamamoto ,  Minoru Yamaga

IPC: G11B5/84 ,  G11B5/00

CPC classification number: G11B5/708 ,  G11B5/73 ,  G11B5/82 ,  G11B5/842

Abstract: A magnetic recording medium includes: a nonmagnetic support having both principal planes, a nonmagnetic layer formed on one principal plane of the nonmagnetic support and containing a nonmagnetic powder, a conductive particle and a binder, and a magnetic layer formed on the nonmagnetic layer and containing a magnetic powder, a conductive particle and a binder, wherein each of the nonmagnetic layer and the magnetic layer is prepared in a wet on dry mode, and a conduction point particle size of the conductive particle contained in the magnetic layer falls within the range of 3 times or more and not more than 5 times an average thickness of the magnetic layer.

Abstract translation: 磁记录介质包括：具有两个主平面的非磁性载体，形成在非磁性载体的一个主平面上并包含非磁性粉末，导电颗粒和粘合剂的非磁性层，以及形成在非磁性层上的含有 磁性粉末，导电性粒子和粘合剂，其中非磁性层和磁性层中的每一个以湿式干燥模式制备，并且包含在磁性层中的导电性粒子的导点粒径落在 磁性层的平均厚度的3倍以上且5倍以下。

公开(公告)号：US07510607B2

公开(公告)日：2009-03-31

申请号：US10892599

申请日：2004-07-16

Applicant: Kazuhisa Kajihara ,  Yoshiaki Takeuchi

Inventor： Kazuhisa Kajihara ,  Yoshiaki Takeuchi

IPC: C01F7/02 ,  C01F7/30 ,  C08K3/22 ,  C09D201/00 ,  C09D5/23

CPC classification number: G11B5/738 ,  C08K3/22 ,  C09D7/61 ,  G11B5/708 ,  Y10T428/32

Abstract: A coating composition, a method for producing the coating composition, a coating film and magnetic recording medium are described. The coating composition comprises a binder, a solvent, and an α-alumina powder, wherein the α-alumina powder satisfies the following (a) and (b): (a) when the α-alumina powder is pressed to obtain a green body and the green body is sintered at 1250° C. under the atmospheric pressure, a relative density of the obtained sintered body is about 80% or more, and (b) a BET specific surface area of the α-alumina powder is about 10 m2/g or more.

Abstract translation: 对涂料组合物，涂料组合物的制造方法，涂膜和磁记录介质进行说明。 涂料组合物包含粘合剂，溶剂和α-氧化铝粉末，其中α-氧化铝粉末满足以下（a）和（b）：（a）当α-氧化铝粉末被压制以获得生坯体 并且生坯在大气压下在1250℃烧结，所得烧结体的相对密度为约80％以上，（b）α-氧化铝粉末的BET比表面积为约10m 2 / g以上。

公开(公告)号：US20070254190A1

公开(公告)日：2007-11-01

申请号：US11413821

申请日：2006-04-28

Applicant: Adam Brodd ,  Bruce Edwards ,  Brian Brong ,  David Lowery

Inventor： Adam Brodd ,  Bruce Edwards ,  Brian Brong ,  David Lowery

IPC: G11B5/708 ,  B05D5/12 ,  B05D3/12 ,  G11B5/716

CPC classification number: G11B5/70 ,  G11B5/708 ,  G11B5/714 ,  G11B5/733 ,  G11B5/84

Abstract: A magnetic recording tape includes an elongated substrate and a magnetic side. The magnetic side includes a support layer formed over the substrate and a magnetic recording layer formed over the support layer to define a magnetic recording surface opposite the substrate. The magnetic recording layer includes magnetic particles and a lubricant and supports a net uncompressed density of at least 30 MB/in2. The magnetic side has an extracted BET surface area of greater than 1.0 m2/g.

Abstract translation: 磁记录带包括细长基板和磁侧。 磁性侧包括形成在衬底上的支撑层和形成在支撑层上方的磁记录层，以限定与衬底相对的磁记录表面。 磁记录层包括磁性颗粒和润滑剂，并且支持至少30MB / in 2的净压缩密度。 磁性面具有大于1.0m 2 / g的提取的BET表面积。

公开(公告)号：US07108903B2

公开(公告)日：2006-09-19

申请号：US10704717

申请日：2003-11-12

Applicant: Shinji Saito ,  Hitoshi Noguchi ,  Hideaki Shiga

Inventor： Shinji Saito ,  Hitoshi Noguchi ,  Hideaki Shiga

IPC: G11B5/82 ,  B65D85/30

CPC classification number: G11B5/738 ,  G11B5/70 ,  G11B5/70678 ,  G11B5/708 ,  G11B23/0332

Abstract: A magnetic disc medium comprising: a magnetic sheet in the form of a disk; a case encasing the magnetic sheet so as to be capable of rotating; and a nonwoven liner fastened on an inner face of the case so as to face the magnetic sheet, wherein the magnetic sheet comprises a support, a substantially nonmagnetic lower layer, and a magnetic layer containing hexagonal ferrite powder dispersed in a binder and having central plane average surface roughness of from 1 nm to 4 nm, and the liner comprises polyethylene terephthalate in an amount of 20% by weight or more.

Abstract translation: 一种磁盘介质，包括：磁盘形式的磁片; 封装磁性片以能够旋转的壳体; 以及紧固在所述壳体的内表面上以面对所述磁性片材的非织造衬里，其中所述磁性片材包括支撑体，基本上非磁性的下层以及分散在粘合剂中并具有中心平面的含有六边形铁氧体粉末的磁性层 平均表面粗糙度为1nm至4nm，衬垫包含20重量％以上的聚对苯二甲酸乙二醇酯。

公开(公告)号：US20060035114A1

公开(公告)日：2006-02-16

申请号：US11201157

申请日：2005-08-11

Applicant: Sadamu Kuse ,  Kazuhiko Nakiri

Inventor： Sadamu Kuse ,  Kazuhiko Nakiri

IPC: G11B5/706

CPC classification number: G11B5/714 ,  G11B5/708

Abstract: A magnetic recording medium with excellent high density recording performances and good durability comprising a non-magnetic substrate, a non-magnetic layer containing a non-magnetic powder and a binder formed on the non-magnetic substrate, and a magnetic layer having a thickness of less than 100 nm and containing a substantially particulate non-magnetic powder, a substantially particulate magnetic powder having an average particle size of less than 25 nm, and a binder, wherein an average particle size R of the non-magnetic powder contained in the magnetic layer and a thickness D of the magnetic powder satisfy the following relationship: 0.88≦R/D≦2.5.

Abstract translation: 一种具有优异的高密度记录性能和良好耐久性的磁记录介质，包括非磁性基板，含有非磁性粉末的非磁性层和形成在非磁性基板上的粘合剂，以及具有厚度为 小于100nm，并且含有基本上颗粒的非磁性粉末，平均粒度小于25nm的基本上颗粒的磁性粉末和粘合剂，其中包含在磁性材料中的非磁性粉末的平均粒径R 层和磁粉的厚度D满足以下关系：0.88 <= R / D <= 2.5。

公开(公告)号：US06989204B2

公开(公告)日：2006-01-24

申请号：US10874094

申请日：2004-06-22

Applicant: Christopher J. Zwettler ,  Christopher A. Merton ,  Ramnath Subramaniam

Inventor： Christopher J. Zwettler ,  Christopher A. Merton ,  Ramnath Subramaniam

IPC: G11B5/73

CPC classification number: G11B5/7305 ,  G11B5/708

Abstract: A magnetic recording medium which includes a substrate having a front side and a backside, a longitudinal direction and a cross-web direction, with a particulate/binder or thin film magnetic layer formed over the front side of the substrate, wherein the magnetic medium has a cross-web dimensional difference from the magnetic recording head used therewith of less than 900 μm/meter over a 35° C. temperature range, and over a 70% relative humidity range. Preferred substrates include thin metals, metal alloys, and thin glass films.

Abstract translation: 一种磁记录介质，其包括具有前侧和后侧，纵向和横向方向的基板，在基板的正面上形成有颗粒/粘合剂或薄膜磁性层，其中磁介质具有 与使用的磁记录头的横向尺寸差异在35℃温度范围内小于900mum /米，超过70％相对湿度范围。 优选的基材包括薄金属，金属合金和薄玻璃膜。

公开(公告)号：US20050282046A1

公开(公告)日：2005-12-22

申请号：US10874094

申请日：2004-06-22

Applicant: Christopher Zwettler ,  Christopher Merton ,  Ramnath Subramaniam

Inventor： Christopher Zwettler ,  Christopher Merton ,  Ramnath Subramaniam

IPC: G11B5/706 ,  G11B5/708 ,  G11B5/71 ,  G11B5/73

CPC classification number: G11B5/7305 ,  G11B5/708

Abstract: A magnetic recording medium which includes a substrate having a front side and a backside, a longitudinal direction and a cross-web direction, with a particulate/binder or thin film magnetic layer formed over the front side of the substrate, wherein the magnetic medium has a cross-web dimensional difference from the magnetic recording head used therewith of less than 900 μm/meter over a 35° C. temperature range, and over a 70% relative humidity range. Preferred substrates include thin metals, metal alloys, and thin glass films.

Abstract translation: 一种磁记录介质，其包括具有前侧和后侧，纵向和横向方向的基板，在基板的正面上形成有颗粒/粘合剂或薄膜磁性层，其中磁介质具有 与使用的磁记录头的横向尺寸差异在35℃温度范围内小于900mum /米，超过70％相对湿度范围。 优选的基材包括薄金属，金属合金和薄玻璃膜。