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1. 发明专利

JP2012181902A Magnetic recording medium 有权
标题翻译：磁记录介质
公开(公告)号：JP2012181902A
公开(公告)日：2012-09-20
申请号：JP2011045496
申请日：2011-03-02
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： NEMOTO HIROAKI , TAKEKUMA IKUKO , NAKAMURA KIMIO , SAYAMA JUNICHI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/851
CPC分类号： G11B5/653 , C22C5/04 , C22C38/002 , C22C2202/02 , G11B5/65 , G11B5/66
摘要： PROBLEM TO BE SOLVED: To perform recording and reproducing operation with resolution suitable for high density recording by improving surface flatness of a magnetic recording medium using a magnetic recording layer made of an L1-type FePt magnetic alloy thin film and by sufficiently closing an interval (spacing) between a magnetic head and the magnetic recording medium.SOLUTION: A magnetic recording layer 14 is composed of multiple magnetic layers 21 and 22 containing magnetic alloy made mainly of Fe and Pt and at least one kind of non-magnetic material selected from carbon, oxide, and nitride. The magnetic layers 21 and 22 are manufactured such that the first magnetic layer 21 located on a substrate side has a granular structure in which magnetic alloy particles made mainly of FePt alloy and a grain boundary part made mainly of the non-magnetic material are separated from each other, and the second magnetic layer 22 located on a surface side from the first magnetic layer has a homogenous structure in which FePt alloy and the non-magnetic material are mixed in a state finer than a diameter of the FePt magnetic alloy particles in the first magnetic layer.
摘要翻译：要解决的问题：通过使用由L1 0构成的磁记录层改善磁记录介质的表面平坦度，进行适用于高密度记录的分辨率的记录和再现操作。 SB>型FePt磁性合金薄膜，并且通过充分地闭合磁头和磁记录介质之间的间隔（间隔）。解决方案：磁记录层14由包含主要由Fe和Pt制成的磁性合金和选自碳，氧化物和氮化物的至少一种非磁性材料的多个磁性层21和22组成。磁性层21和22被制造成使得位于基板侧的第一磁性层21具有主要由FePt合金制成的磁性合金颗粒和主要由非磁性材料制成的晶界部分的颗粒结构，并且位于第一磁性层的表面侧的第二磁性层22具有均匀结构，其中FePt合金和非磁性材料以比FePt磁性合金颗粒的直径更细的状态混合第一磁性层。版权所有（C）2012，JPO＆INPIT

2. 发明专利

JP2005093040A Perpendicular magnetic recording medium and its manufacturing method 审中-公开
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：JP2005093040A
公开(公告)日：2005-04-07
申请号：JP2003329297
申请日：2003-09-22
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEKUMA IKUKO , NAKAGAWA HIROYUKI , TAMAI ICHIRO , HIRAYAMA YOSHIYUKI , HOSOE YUZURU
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/851 , H01F10/16 , H01F10/30
摘要： PROBLEM TO BE SOLVED: To achieve a high medium S/N ratio without deteriorating a magnetic separation state of crystal grains.
SOLUTION: The perpendicular magnetic recording medium is provided with a substrate, a soft magnetic layer formed on the substrate, intermediate layers formed on the soft magnetic layer and a magnetic recording layer formed on the intermediate layers. The intermediate layers are at least two layers and contain Ru or an Ru alloy and the magnetic recording layer consists of a material containing a CoCrPt alloy and oxygen. Crystal orientation can be enhanced without increasing diameters of the grains by specifying the half value width Δθ
50 of a rocking curve of diffraction on the plane Ru(0002) measured by using an X-ray diffraction device to be ≤5°.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了在不降低晶粒的磁分离状态的情况下实现高介质S / N比。解决方案：垂直磁记录介质设置有基板，形成在基板上的软磁层，形成在软磁层上的中间层和形成在中间层上的磁记录层。中间层为至少两层，含有Ru或Ru合金，磁记录层由含有CoCrPt合金和氧的材料构成。通过使用X射线衍射装置测定的平面Ru（0002）上的衍射的摇摆曲线的半值宽度Δθ 50 可以提高晶粒直径，而不增加晶粒直径 ≤5°。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2004134041A Perpendicular magnetic record medium, its manufacturing method, and magnetic storage device 审中-公开
标题翻译：全能磁记录介质，其制造方法和磁存储器件
公开(公告)号：JP2004134041A
公开(公告)日：2004-04-30
申请号：JP2002299792
申请日：2002-10-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAMAI ICHIRO , HIRAYAMA YOSHIYUKI , TAKEKUMA IKUKO
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/851 , H01F10/16
摘要： PROBLEM TO BE SOLVED: To provide a large capacity magnetic storage device that can make ultra-high density recording of 15 gigabits per square centimeter or more. SOLUTION: This perpendicular magnetic recording medium has four layers on the base plate. The first intermediate layer (111) closest to the base plate is made of a material having a face-centered cubic structure with its (111)face parallel with the base plate or a hexagonal close-packed structure with its (0001) face parallel with the base plate. The second intermediate layer is an oxygen-containing layer. The third intermediate layer is made of a material having a face-centered cubic structure or a hexagonal close-packed structure. The fourth intermediate layer is made of a material having a hexagonal close-packed structure. The perpendicular recording layer has Co as the main component and contains oxygen. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供可以使每平方厘米或更多的15千兆比特的超高密度记录的大容量磁存储装置。
解决方案：该垂直磁记录介质在底板上有四层。最靠近基板的第一中间层（111）由具有面心立方结构的材料制成，其（111）面平行于基板或六边形密堆积结构，其（0001）面与基板。第二中间层是含氧层。第三中间层由具有面心立方结构或六方密堆积结构的材料制成。第四中间层由具有六方密堆积结构的材料制成。垂直记录层具有Co作为主要成分并含有氧。版权所有（C）2004，JPO

4. 发明专利

JP2012048784A Perpendicular magnetic recording medium and manufacturing method thereof 审中-公开
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：JP2012048784A
公开(公告)日：2012-03-08
申请号：JP2010189545
申请日：2010-08-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEKUMA IKUKO , NAKAMURA KIMIO , SAYAMA JUNICHI , NEMOTO HIROAKI
IPC分类号： G11B5/851 , C23C14/06 , G11B5/65 , G11B5/66
CPC分类号： G11B5/84 , G11B5/65 , G11B5/66
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium which has perpendicular magnetic anisotropy energy and a crystal gain diameter enough to achieve surface recording density of one terabit or more per square centimeter and is excellent in mass productivity, and a manufacturing method thereof.SOLUTION: A substrate temperature control layer 2, an under layer 3, and a magnetic recording layer 4 are sequentially formed on a substrate 1. The magnetic recording layer is formed by repeating by N times (N≥2) a magnetic layer lamination step composed of a first step for heating the substrate in a heating chamber, and a second step for film-forming a magnetic recording layer made of alloy composed chiefly of FePt obtained by adding at least one type of nonmagnetic material selected from a group composed of C, Si oxides in a film-forming chamber.
摘要翻译：要解决的问题：提供具有垂直磁各向异性能和晶体增益直径的垂直磁记录介质，其足以实现一平方厘米或更多每平方厘米的表面记录密度，并且具有优异的批量生产率和制造方法。解决方案：衬底温度控制层2，下层3和磁记录层4依次形成在衬底1上。磁记录层通过重复N次（N≥2）磁层层叠工序由在加热室中加热基板的第一工序，以及第二工序，用于成膜由主要由FePt组成的合金构成的磁记录层，所述磁记录层通过添加至少一种选自组成的组中的非磁性材料的C，Si氧化物。版权所有（C）2012，JPO＆INPIT

5. 发明专利

JP2005108268A Perpendicular magnetic recording medium and its manufacturing method 审中-公开
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：JP2005108268A
公开(公告)日：2005-04-21
申请号：JP2003322433
申请日：2003-09-16
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TAKEKUMA IKUKO , NAKAGAWA HIROYUKI , TAMAI ICHIRO , HIRAYAMA YOSHIYUKI , HOSOE YUZURU
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/73 , G11B5/84 , G11B5/851
CPC分类号： G11B5/667 , G11B5/656
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium for realizing a high medium S/N value without degrading the magnetic isolation of crystal grains from each other.
SOLUTION: The perpendicular magnetic recording medium comprises: a substrate 11; a soft magnetic layer 13 formed on the substrate; an intermediate layer formed on the soft magnetic layer; and a magnetic recording layer 17 formed on the intermediate layer. The intermediate layer consists of at least two or more layers and contains Ru or an Ru alloy and the magnetic recording layer is made of a material containing a CoCrPt alloy and oxygen. The crystallographic orientation of the recording layer is sufficiently improved without increasing the crystal grain size if a half value width Δθ
50 of the rocking curve of the Ru (0002) diffraction peak measured by an X-ray diffraction device is ≤5°.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供一种用于实现高介质S / N值的垂直磁记录介质，而不降低晶粒彼此的磁隔离。解决方案：垂直磁记录介质包括：基板11; 形成在基板上的软磁性层13; 形成在软磁性层上的中间层; 以及形成在中间层上的磁记录层17。中间层由至少两层或更多层组成，并含有Ru或Ru合金，磁记录层由含有CoCrPt合金和氧的材料制成。如果通过X射线衍射装置测量的Ru（0002）衍射峰的摇摆曲线的半值宽度Δθ 50 而不增加晶粒尺寸，则记录层的晶体取向得到充分改善 ≤5°。版权所有（C）2005，JPO＆NCIPI

6. 发明专利

JP2004296030A Perpendicular magnetic recording medium and its manufacturing method 有权
公开(公告)号：JP2004296030A
公开(公告)日：2004-10-21
申请号：JP2003089689
申请日：2003-03-28
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRAYAMA YOSHIYUKI , TAMAI ICHIRO , ICHIHARA TAKAYUKI , NAKAGAWA HIROYUKI , NEMOTO HIROAKI , KODAMA MINEAKI , TAKEKUMA IKUKO
IPC分类号： G11B5/65 , G11B5/64 , G11B5/66 , G11B5/84 , G11B5/851
CPC分类号： G11B5/65 , G11B5/656 , G11B5/66 , G11B5/667 , G11B5/732 , G11B5/7325 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium wherein medium noise is small, resistance to thermal fluctuation is high, and recording resolution is high.
SOLUTION: When a recording layer is formed through a substrate layer on a nonmagnetic substrate, the step of forming a metal layer and the step of forming an oxide layer set to achiever an average film thickness of 0.2nm or lower are repeated. Thus, crystal particles are magnetically isolated without disturbing the orientation of recording layer crystal particles in the recording layer of the perpendicular magnetic recording medium, and without deteriorating the magnetic characteristics of the recording layer crystal particles.
COPYRIGHT: (C)2005,JPO&NCIPI

7. 发明专利

JP2004146029A Perpendicular magnetic recording medium, method of manufacturing the same, and magnetic storage using the same 有权
标题翻译：全息磁记录介质，其制造方法和使用该磁记录介质的磁存储
公开(公告)号：JP2004146029A
公开(公告)日：2004-05-20
申请号：JP2003006507
申请日：2003-01-15
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRAYAMA YOSHIYUKI , NAKAGAWA HIROYUKI , NEMOTO HIROAKI , TAMAI ICHIRO , TAKEKUMA IKUKO
IPC分类号： G11B5/65 , B32B3/00 , G11B5/147 , G11B5/64 , G11B5/66 , G11B5/667 , G11B5/70 , G11B5/73 , G11B5/851
CPC分类号： B82Y10/00 , G11B5/656 , G11B5/66 , G11B5/7325 , G11B5/743 , Y10T428/24802
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium which is small in medium noise, strong to thermal fluctuation, high in recording efficiency and high in recording resolution by making crystal grains of a recording layer magnetically isolated, finer and more uniform and making the film of an intermediate layer thinner. SOLUTION: The method of manufacturing the perpendicular magnetic recording medium provided with a perpendicular magnetization film through a backing soft magnetic layer on a nonmagnetic substrate has at least two steps; a step for forming a nonmetallic element-containing layer containing any among oxygen, nitrogen, silicon, and carbon and a step of forming metallic layers of isolated island-shaped structures between a step of forming the backing soft magnetic layer and a step for forming the perpendicular magnetization film. The average film thickness of the metallic layers of the isolated island-shaped structures is preferably specified to 0.1 nm, 2 nm. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：为了提供一种垂直磁记录介质，其通过使记录层的晶粒磁隔离，更精细和更多地提供中等噪声，高热波动，高记录效率和高记录分辨率的垂直磁记录介质均匀并使中间层的薄膜变薄。解决方案：通过非磁性衬底上的背衬软磁层制造垂直磁记录介质的垂直磁记录介质的制造方法至少有两个步骤：用于形成含有氧，氮，硅和碳中的任何一种的含非金属元素的层的步骤和在形成背衬软磁性层的步骤和形成背衬软磁性层的步骤之间形成孤立的岛状结构的金属层的步骤垂直磁化膜。孤立的岛状结构体的金属层的平均膜厚优选规定为0.1nm，2nm。版权所有（C）2004，JPO

8. 发明专利

JP2012174320A Magnetic recording medium and magnetic recorder 有权
标题翻译：磁记录介质和磁记录仪
公开(公告)号：JP2012174320A
公开(公告)日：2012-09-10
申请号：JP2011037408
申请日：2011-02-23
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SAYAMA JUNICHI , TAKEKUMA IKUKO , NEMOTO HIROAKI
IPC分类号： G11B5/738 , G11B5/64 , G11B5/65 , G11B5/667 , H01F10/14 , H01F10/16 , H01F10/28
CPC分类号： G11B5/65 , G11B5/7325
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium using, for a magnetic recording layer, L1-type FePt regular alloy that has excellent magnetic characteristics while using a MgO ground layer which can be formed in mass production process and of which film thickness is equal to or less than 3 nm.SOLUTION: A conductive compound having a crystal structure belonging to a cubic system is used as the material of a ground layer provided on the lower part of a MgO ground layer. The film thickness of the MgO layer is 1 nm or more and 3 nm or less.

9. 发明专利

JP2004127461A Perpendicular magnetic recording medium and its manufacturing method 审中-公开
公开(公告)号：JP2004127461A
公开(公告)日：2004-04-22
申请号：JP2002293151
申请日：2002-10-07
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： HIRAYAMA YOSHIYUKI , TAMAI ICHIRO , TAKEKUMA IKUKO
IPC分类号： G11B5/64 , G11B5/65 , G11B5/667 , G11B5/738 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium which has less medium noise, is resistive to heat fluctuation, and has high recording resolution and its manufacturing method.
SOLUTION: This method has a step of forming a film of which the main component is Ta between a step of forming a lined soft magnetic film and a step of forming a perpendicular magnetic film. Also the method has a heating process in which the film becomes 350 to 450°C after the step of forming the perpendicular magnetic film.
COPYRIGHT: (C)2004,JPO

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