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1. 发明专利

JP2007273037A Magnetic recording medium and its manufacturing method 审中-公开
标题翻译：磁记录介质及其制造方法
公开(公告)号：JP2007273037A
公开(公告)日：2007-10-18
申请号：JP2006099934
申请日：2006-03-31
申请人： Fujifilm Corp , 富士フイルム株式会社
发明人： HANAI KAZUKO
IPC分类号： G11B5/70 , G11B5/706 , G11B5/714 , G11B5/738 , G11B5/84
CPC分类号： G11B5/70621 , G11B5/714 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium which prevents increase in a frictional coefficient due to running of a medium, appearance of debris on the surface of a tape, head dirt and head clogging in high density recording and reproducing system especially using an MR head, and can suppress a phenomenon of deterioration in electromagnetic transducing characteristics with time caused by running of a medium, and to provide its manufacturing method. SOLUTION: In the magnetic recording medium, a magnetic layer including at least ferromagnetic metal powder and a binder is provided on a support. The ferromagnetic metal powder contains iron, cobalt and yttrium, wherein the content of yttrium is 2 to 20 atm.% of the sum total of iron and cobalt, and the ferromagnetic metal powder has ≤50 nm average major axis length. The magnetic recording medium can attain 100 paths or more in a magnetoresistive effect (MR) head resistance value lowering test. Its manufacturing method is also provided. COPYRIGHT: (C)2008,JPO&INPIT
摘要翻译：要解决的问题：提供一种防止由于介质运行引起的摩擦系数增加的磁记录介质，磁带表面上的碎屑的出现，高密度记录和再现系统中的头部污垢和头部堵塞特别是使用MR磁头，能够抑制电介质的运转引起的电磁转换特性劣化的现象，提供其制造方法。解决方案：在磁记录介质中，至少包含铁磁金属粉末和粘合剂的磁性层设置在支撑体上。铁磁性金属粉末含有铁，钴和钇，其中钇含量为2〜20atm，铁和钴总量的％，铁磁性金属粉末的平均长轴长度≤50nm。在磁阻效应（MR）磁头电阻值降低试验中，磁记录介质可达到100路以上。还提供其制造方法。版权所有（C）2008，JPO＆INPIT

2. 发明专利

JP2006052456A Alloy powder with fcc structure and manufacturing method therefor 有权
标题翻译：具有FCC结构的合金粉末及其制造方法
公开(公告)号：JP2006052456A
公开(公告)日：2006-02-23
申请号：JP2004236752
申请日：2004-08-16
申请人： Dowa Mining Co Ltd , 同和鉱業株式会社
发明人： SATO KIMITAKA
IPC分类号： B22F1/00 , B22F9/24 , C22C5/04 , C22C19/07 , C22C38/00
CPC分类号： H01F1/065 , B22F1/0018 , B22F9/24 , B82Y10/00 , B82Y30/00 , C22C1/0491 , G11B5/656 , G11B5/70615 , G11B5/70621 , H01F1/0054 , H01F1/068 , Y10S977/773
摘要： PROBLEM TO BE SOLVED: To provide an alloy powder (a precursor of a ferromagnetic alloy powder) with an fcc structure, which is used for stably producing a magnetic material made of FePt nanoparticles with an fct (face centered tetragonal crystal) structure which is suitable for a magnetic recording material and has a small composition distribution. SOLUTION: The alloy powder having the face-centered cubic structure (fcc structure) essentially comprises at least one selected from Fe and Co and at least one selected from Pt and Pd. Here, the average particle size (D TEM ) measured through transmission electron microscopy is ≤50 nm, and when the crystal grain size obtained through X-ray diffraction is expressed as Dx, the degree of single crystallization, expressed as (D TEM )/(Dx), is COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种具有fcc结构的合金粉末（铁磁性合金粉末的前体），其用于稳定地制造由具有fct（面朝中心的四方晶体）结构的FePt纳米颗粒制成的磁性材料其适用于磁记录材料并具有小的组成分布。解决方案：具有面心立方结构（fcc结构）的合金粉末基本上包含选自Fe和Co中的至少一种以及选自Pt和Pd中的至少一种。这里，通过透射电子显微镜测定的平均粒径（D TEM ）为≤50nm，当通过X射线衍射获得的晶粒尺寸表示为Dx时，单结晶度，表示为（D TEM ）/（Dx），为<1.50。合金粉末可以通过在络合剂的存在下通过多元醇工艺合成来制造。版权所有（C）2006，JPO＆NCIPI

3. 发明专利

JP2004047009A Magnetic recording medium and manufacturing method for magnetic recording medium 审中-公开
公开(公告)号：JP2004047009A
公开(公告)日：2004-02-12
申请号：JP2002205336
申请日：2002-07-15
申请人： Sony Corp , ソニー株式会社
发明人： SATO SATOSHI
IPC分类号： G11B5/65 , G11B5/70 , G11B5/702 , G11B5/706 , G11B5/73 , G11B5/851
CPC分类号： G11B5/7023 , G11B5/70 , G11B5/70621 , G11B5/70673 , G11B5/7305
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic recording medium in which a desirable reproduction output, noise level, and error rate are obtained and storage stability is also excellent.
SOLUTION: This magnetic recording medium 10 has constitution in which a magnetic layer 3 consisting of a maghemite thin film containing cobalt is formed on a long substrate 1 consisting of aromatic polyimide, film thickness of the substrate 1 is 3∼10μm, average surface roughness of ten points (SRz) of a plane forming the magnetic layer 3 is 5∼30μm, film thickness of the magnetic layer 3 is 10∼50nm, average surface roughness of center plane (SRz) is 0.1∼3.0nm, coercive force in the plane direction is 2,000∼4,000Oe(158,000∼316,000A/m).
COPYRIGHT: (C)2004,JPO

4. 发明专利

JP3473875B2 Magnetic recording medium 失效
公开(公告)号：JP3473875B2
公开(公告)日：2003-12-08
申请号：JP18975395
申请日：1995-07-04
申请人：富士写真フイルム株式会社
发明人：俊彦三浦 , 幸一正木
IPC分类号： C09D5/23 , C09D7/12 , G11B5/70 , G11B5/706 , G11B5/714 , G11B5/738
CPC分类号： G11B5/70621 , G11B5/70 , G11B5/70615 , G11B5/714 , Y10S428/90 , Y10T428/256 , Y10T428/26

5. 发明专利

JPS57126103A Cohesive magnetic iron particle 失效
标题翻译：粘合磁铁颗粒
公开(公告)号：JPS57126103A
公开(公告)日：1982-08-05
申请号：JP20102381
申请日：1981-12-15
申请人： Bayer Ag
发明人： YAKOPU RADEMAHAASU , RORUFU NAUMAN , HANSUUPEETAA PIIAMAN , GUNTAA BUKUSUBAUMU , BUORUFUGANGU RAMUBORUTO
IPC分类号： B22F1/00 , B22F9/04 , C09D5/23 , C09D7/12 , G11B5/62 , G11B5/706 , H01F1/06
CPC分类号： B22F1/0096 , G11B5/70621 , H01F1/061

6. 发明专利

JPS5163494A Taishokuseikyojiseikinzokufunmatsu oyobi seizohoho 失效
公开(公告)号：JPS5163494A
公开(公告)日：1976-06-01
申请号：JP13446774
申请日：1974-11-21
申请人： Fuji Photo Film Co Ltd
发明人： AONUMA MASASHI , TAMAI YASUO
IPC分类号： G11B5/712 , B22F1/02 , C09D5/23 , C09D7/12 , G11B5/706 , H01F1/06 , H01F1/09
CPC分类号： H01F1/061 , B22F1/02 , G11B5/70615 , G11B5/70621

7. 发明专利

JPWO2015198514A1 磁気記録媒体审中-公开
公开(公告)号：JPWO2015198514A1
公开(公告)日：2017-04-20
申请号：JP2016528986
申请日：2015-04-10
申请人：ソニー株式会社
发明人：栄治中塩 , 栄治中塩 , 山鹿　実 , 実山鹿 , 潤寺川 , 潤寺川 , 印牧　洋一 , 洋一印牧 , 前嶋　克紀 , 克紀前嶋 , 橋本　淳 , 淳橋本
IPC分类号： G11B5/706 , G11B5/70 , G11B5/714
CPC分类号： G11B5/70642 , G11B5/70 , G11B5/70621 , G11B5/70678 , G11B5/714 , G11B5/78
摘要：磁気記録媒体は、支持体と、磁性粉を含む磁性層とを備える。磁性粉は、立方晶フェライトを含む磁性粒子およびε相酸化鉄を含む磁性粒子の少なくとも一方を含んでいる。磁性粉の平均粒子サイズは、10nm以上14nm以下であり、磁性粉の平均アスペクト比は、0.75以上1.25以下であり、磁性層の十点平均粗さRzは、35nm以下である。【選択図】図1

8. 发明专利

JP2009129500A Magnetic recording medium, and method of manufacturing magnetic recording medium 审中-公开
标题翻译：磁记录介质和制造磁记录介质的方法
公开(公告)号：JP2009129500A
公开(公告)日：2009-06-11
申请号：JP2007303504
申请日：2007-11-22
申请人： Tdk Corp , Tdk株式会社
发明人： JINGU NOBUHIRO , SATO MAMORU , KITAMURA KENICHI , YOSHIMURA MEGUMI
IPC分类号： G11B5/702 , G11B5/706 , G11B5/712 , G11B5/714 , G11B5/842
CPC分类号： G11B5/70621 , G11B5/712 , G11B5/842
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium which has both weatherability and high recording density.
SOLUTION: The magnetic recording medium 2 includes a magnetic layer 6 which includes at least an SmCo based magnetic particulate 12 and an hydrophobic binder. The SmCo based magnetic particulate 12 has a core 14 which comprises an SmCo based nanoparticles and a hydrophilic polymer 16 which covers at least a part of a surface of the core 14.
COPYRIGHT: (C)2009,JPO&INPIT
摘要翻译：要解决的问题：提供具有耐候性和高记录密度的磁记录介质。解决方案：磁记录介质2包括至少包含SmCo的磁性颗粒12和疏水粘合剂的磁性层6。基于SmCo的磁性颗粒12具有包含SmCo基纳米颗粒的芯14和覆盖芯14的表面的至少一部分的亲水性聚合物16.（C）2009，JPO＆INPIT

9. 发明专利

JP2005092991A Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：JP2005092991A
公开(公告)日：2005-04-07
申请号：JP2003326200
申请日：2003-09-18
申请人： Fuji Photo Film Co Ltd , 富士写真フイルム株式会社
发明人： MORIWAKI KENICHI , USUKI KAZUYUKI
IPC分类号： G11B5/65 , G11B5/70 , G11B5/706 , G11B5/73 , G11B5/738
CPC分类号： G11B5/738 , G11B5/70 , G11B5/70621 , G11B5/73 , Y10T428/259 , Y10T428/265
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive high-capacity magnetic recording medium having high performance and high reliability, by forming an underlayer, an intermediate layer and a magnetic layer, in this order at room temperature. SOLUTION: The magnetic recording medium formed with at least the underlayer, the intermediate layer and the magnetic layer, in this order, on at least one surface of a support is an intra-surface magnetic recording medium, in which the underlayer is composed of Ru, the intermediate layer is composed of an RuCo alloy and the magnetic layer has a granular structure composed of a ferromagnetic metal alloy containing at least Co and a nonmagnetic oxide. COPYRIGHT: (C)2005,JPO&NCIPI

10. 发明专利

JP2005085305A Magnetic recording medium 审中-公开
标题翻译：磁记录介质
公开(公告)号：JP2005085305A
公开(公告)日：2005-03-31
申请号：JP2003312813
申请日：2003-09-04
申请人： Fuji Photo Film Co Ltd , 富士写真フイルム株式会社
发明人： KATO KAZUO
IPC分类号： G11B5/70 , G11B5/706 , G11B5/714 , G11B5/735
CPC分类号： G11B5/735 , G11B5/70 , G11B5/70621 , G11B5/70678 , G11B5/714 , Y10T428/265
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium in which a back layer is improved and which therefore has a low error rate and excellent in a wound shape after running and a sliding property. SOLUTION: In a magnetic recording medium which has a magnetic layer at a one side of a support and has a back layer at a surface of the other side, the number of projections having a height of 50 nm or more to less than 75 nm is 800-1,500 pieces/6,400 μm 2 , and the number of projections having a height of 75 nm or more is 600 pieces/6,400 μm 2 or less. COPYRIGHT: (C)2005,JPO&NCIPI

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