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1. 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

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

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

5. 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

6. 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

7. 发明专利

JP2000339659A MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE 失效
公开(公告)号：JP2000339659A
公开(公告)日：2000-12-08
申请号：JP15113699
申请日：1999-05-31
申请人： HITACHI LTD
发明人： YAMAMOTO TOMOO , TAMAI ICHIRO , ISHIKAWA AKIRA , SUZUKI HIROYUKI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To provide a medium having excellent resistance against thermal fluctuation and having low noise by forming a Co alloy magnetic film directly on a substrate or with a specified base film interposed, and forming an orientation controlling film containing elements selected from each two groups in a specified range. SOLUTION: An orientation controlling film containing an element selected from Cr, Ge and Si by 50 to 80 at.% and an element selected from Al, Mo, Re and W by 20 to 45 at.% is formed on a substrate. Then a magnetic film consisting of a Co alloy is formed on the orientation controlling film. Preferably, the orientation controlling film substantially has a C11b crystal structure so as to orient the axis of easy magnetization of the magnetic film in the film plane. In order to orient a Cr base film to be formed thereon in the (211) direction by using the C11b orientation controlling film, the orientation controlling film is oriented in the (116) direction.

8. 发明专利

JPH11353820A MAGNETIC STORAGE DEVICE AND EVALUATION APPARATUS FOR MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH11353820A
公开(公告)日：1999-12-24
申请号：JP16180198
申请日：1998-06-10
申请人： HITACHI LTD
发明人： TAMAI ICHIRO , TANAHASHI KIWAMU , KANBE TETSUYA , MATSUNUMA SATORU , HOSOE YUZURU , ITO KIYONARI
IPC分类号： G11B20/10 , G11B19/02 , G11B20/12 , G11B20/18
摘要： PROBLEM TO BE SOLVED: To obtain a magnetic storage device in which an information bit started to degrade is restored automatically by preserving information which is recorded at the same time as a marker bit temporarily in a cache memory, recording again in a magnetic recording medium, and up dating the marker bit which is recorded in a header simultaneously. SOLUTION: A cache memory 31, an output detection circuit 32 and an automatic restoration control circuit 33 are provided at a control circuit system 35. The automatic restoration control circuit 33 is started by using an empty time in which an instruction from a host computer is not executed. When the degradation of information recorded inside a magnetic storage device is confirmed by using the output detection circuit 32, primary information is retreated to the cache memory 31, and it is recorded again. That is to say, a function which automatically copies the information inside the magnetic storage device is provided. At this time, it is suffient that the output detection circuit 32 can compares the output of a marker bit recorded in a header with the output of a reference bit recorded directly before.

9. 发明专利

JPH1173605A MAGNETIC STORAGE DEVICE 失效
公开(公告)号：JPH1173605A
公开(公告)日：1999-03-16
申请号：JP23361297
申请日：1997-08-29
申请人： HITACHI LTD
发明人： YAMAMOTO TOMOO , HOSOE YUZURU , TANAHASHI KIWAMU , KANBE TETSUYA , TAMAI ICHIRO
IPC分类号： G11B5/66 , G11B5/09 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To efficiently detect a signal from a recording bit by forming the recording bit in the transversal magnetic recording system so that a magnetizing direction of a magnetic record medium is nearly parallel to a medium surface and in the direction nearly orthogonal to a recording track direction and detecting leakage magnetic flux from the magnetic record medium with a reproducing head element using a magnetoresistance effect. SOLUTION: Since a magnetic pole occurs on the track edge part of the recording bit 0503, the leakage flux 0502 occurs in space. When a reproducing head consisting of an MR element 0501 being the reproducing head element using the magnetoresistance effect is traveled just on the recording bit 0503, the magnetoresistance of the MR element 0501 is changed according to the direction of the leakage flux 0503 from the recording bit 0501. At this point, when a fixed current J flows through the MR element 0501 always, the directional change of the leakage flux 0503 is detected as a voltage change. Thus, recording density per a square inch is corresponding with >=2 G bits.

10. 发明专利

JPH10269548A MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE USING IT 失效
公开(公告)号：JPH10269548A
公开(公告)日：1998-10-09
申请号：JP7717497
申请日：1997-03-28
申请人： HITACHI LTD
发明人： KANBE TETSUYA , TAKAHASHI YOSHIO , ISHIKAWA AKIRA , TAMAI ICHIRO , HOSOE YUZURU , MATSUDA YOSHIFUMI , TANAHASHI KIWAMU , YAMAMOTO TOMOO
IPC分类号： G11B5/66 , G11B5/39 , G11B5/64 , G11B5/65 , H01F10/16
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable magnetic storage device capable of recording/reproducing high density information. SOLUTION: This device constitutes a reproducing part of a magnetic head with a magneto-resistive effect type magnetic head, and makes a magnetic recording medium a structure having a magnetic layer formed on a substrate through a single layer or a multilayer substrate layer. Then, the magnetic layer is constituted of a columnar structural magnetic crystal particle, or an amorphous magnetic particle, and the mean particle size of this magnetic particle, and particle size variance standardized by the mean particle size are made respectively 16 nm or below, 0.5 or below, and the value Ku.v/kT dividing the product between the magnetic anisotropic constant Ku and the volume v of this magnetic particle by the product between the Boltzmann constant k and the absolute temp. T is made 60 or above, and the magnetic layer film thickness is made double or below of the mean particle size. Thus, a noise is reduced, and a high S/N and a low bit error rate are obtained, and the magnetic storage device having a mean failure interval of 300 thousand times or above at high recording density of 2 G bits per 1 inch is realized.

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