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公开(公告)号：US07005202B2
公开(公告)日：2006-02-28
申请号：US10631768
申请日：2003-08-01
申请人： Tetsuya Kanbe , Yotsuo Yahisa , Yoshibumi Matsuda , Jo Inagaki , Koji Sakamoto
发明人： Tetsuya Kanbe , Yotsuo Yahisa , Yoshibumi Matsuda , Jo Inagaki , Koji Sakamoto
CPC分类号： G11B5/7325 , G11B5/00 , G11B5/656 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/12944
摘要： The longitudinal magnetic recording medium includes a non-magnetic substrate, a first underlayer having at least one of an amorphous structure and a fine crystal structure formed on the non-magnetic substrate, a second underlayer having a body-centered cubic structure formed on the first underlayer, a third underlayer having a hexagonal closed packed structure formed on the second underlayer, and a magnetic layer having the hexagonal closed packed structure formed on the third underlayer, wherein the third underlayer is composed of an alloy containing Co and Ru.
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公开(公告)号：US06623874B2
公开(公告)日：2003-09-23
申请号：US09888523
申请日：2001-06-26
申请人： Tetsuya Kanbe , Yotsuo Yahisa , Yoshibumi Matsuda , Jo Inagaki , Koji Sakamoto
发明人： Tetsuya Kanbe , Yotsuo Yahisa , Yoshibumi Matsuda , Jo Inagaki , Koji Sakamoto
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/00 , G11B5/656 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/12944
摘要： The longitudinal magnetic recording medium includes a non-magnetic substrate, a first underlayer having at least one of an amorphous structure and a fine crystal structure formed on the non-magnetic substrate, a second underlayer having a body-centered cubic structure formed on the first underlayer, a third underlayer having a hexagonal closed packed structure formed on the second underlayer, and a magnetic layer having the hexagonal closed packed structure formed on the third underlayer, wherein the third underlayer is composed of an alloy containing Co and Ru.
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3.发明授权Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage 失效磁记录介质，制造磁记录介质的方法和磁存储公开(公告)号：US06692843B2
公开(公告)日：2004-02-17
申请号：US09784078
申请日：2001-02-16
申请人： Yoshibumi Matsuda , Akira Ishikawa , Yotsuo Yahisa , Yuzuru Hosoe , Tetsuya Kanbe , Koji Sakamoto
发明人： Yoshibumi Matsuda , Akira Ishikawa , Yotsuo Yahisa , Yuzuru Hosoe , Tetsuya Kanbe , Koji Sakamoto
IPC分类号： G11B573
CPC分类号： G11B5/7325 , G11B5/8404 , Y10T428/1266 , Y10T428/12667
摘要： A magnetic recording medium having first undercoating layers 40, 40′ formed directly or via substrate face undercoating layers on a substrate 40, second undercoating layers 42, 42′ directly formed on the first undercoating layers 40, 40′, magnetic films 43, 43′ formed on the second undercoating layers 42, 42′, and protective films 44, 44′ formed on the magnetic films 43, 43′. Clusters having a large amount of oxygen are dispersed on the boundary face of the first and second undercoating layers. Preferably, the first undercoating layer is made of an alloy which includes two kinds of elements in which the difference between oxide formation standard free energies &Dgr;G° of the elements at the temperature of 250° C. is large.
摘要翻译： 一种磁记录介质，其具有直接形成在衬底40上的衬底表面底涂层形成的第一底涂层40,40'，直接形成在第一底涂层40,40'上的第二底涂层42,42'，磁性膜43,43' 形成在第二底涂层42,42'上，以及形成在磁性膜43,43'上的保护膜44,44'。 具有大量氧的簇分散在第一和第二底涂层的边界面上。 优选地，第一底涂层由包含两种元素的合金制成，其中在250℃的温度下元素的氧化物形成标准自由能的差ΔG°大。
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公开(公告)号：US06756113B2
公开(公告)日：2004-06-29
申请号：US10077880
申请日：2002-02-20
申请人： Yoshibumi Matsuda , Koji Sakamoto , Tetsuya Kanbe , Yotsuo Yahisa
发明人： Yoshibumi Matsuda , Koji Sakamoto , Tetsuya Kanbe , Yotsuo Yahisa
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/66 , G11B5/84 , Y10S428/90 , Y10T428/12465 , Y10T428/12861 , Y10T428/12931 , Y10T428/265
摘要： A magnetic recording medium includes a first underlying film of a NiTa alloy having a nonmagnetic amorphous structure and formed on a nonmagnetic substrate, and a second underlying film made of an alloy containing Cr and Ti, further a first magnetic film of a CoCrPt alloy, a nonmagnetic intermediate film of Ru and a second magnetic film of a CoCrPtB alloy that are serially formed over the first underlying film, wherein oxygen locally exists in an interface between the first underlying film and the second underlying film.
摘要翻译： 磁记录介质包括具有非磁性无定形结构并形成在非磁性基底上的NiTa合金的第一底膜，以及由含有Cr和Ti的合金制成的第二底膜，另外还有CoCrPt合金的第一磁性膜， Ru的非磁性中间膜和CoCrPtB合金的第二磁性膜，其顺序地形成在第一底层膜上，其中氧局部存在于第一底层膜和第二底膜之间的界面中。
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5.发明授权Magnetic recording medium, method of fabricating magnetic recording medium, and magnetic storage 失效磁记录介质，制造磁记录介质的方法和磁存储公开(公告)号：US06197367B1
公开(公告)日：2001-03-06
申请号：US08960751
申请日：1997-10-29
申请人： Yoshibumi Matsuda , Akira Ishikawa , Yotsuo Yahisa , Yuzuru Hosoe , Tetsuya Kanbe , Koji Sakamoto
发明人： Yoshibumi Matsuda , Akira Ishikawa , Yotsuo Yahisa , Yuzuru Hosoe , Tetsuya Kanbe , Koji Sakamoto
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/8404 , Y10T428/1266 , Y10T428/12667
摘要： A magnetic recording medium having first undercoating layers 40, 40′ formed directly or via substrate face undercoating layers on a substrate 40, second undercoating layers 42, 42′ directly formed on the first undercoating layers 40, 40′, magnetic films 43, 43′ formed on the second undercoating layers 42, 42′, and protective films 44, 44′ formed on the magnetic films 43, 43′. Clusters having a large amount of oxygen are dispersed on the boundary face of the first and second undercoating layers. Preferably, the first undercoating layer is made of an alloy which includes two kinds of elements in which the difference between oxide formation standard free energies &Dgr;G° of the elements at the temperature of 250° C. is large.
摘要翻译： 一种磁记录介质，其具有直接形成在衬底40上的衬底表面底涂层形成的第一底涂层40,40'，直接形成在第一底涂层40,40'上的第二底涂层42,42'，磁性膜43,43' 形成在第二底涂层42,42'上，以及形成在磁性膜43,43'上的保护膜44,44'。 具有大量氧的簇分散在第一和第二底涂层的边界面上。 优选地，第一底涂层由包含两种元素的合金制成，其中在250℃的温度下元素的氧化物形成标准自由能DELTAG°之间的差异大。
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公开(公告)号：US06596420B2
公开(公告)日：2003-07-22
申请号：US10101946
申请日：2002-03-21
申请人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
发明人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
IPC分类号： G11B566
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/39 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/26
摘要： A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.
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公开(公告)号：US06403240B1
公开(公告)日：2002-06-11
申请号：US08849414
申请日：1997-05-19
申请人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
发明人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
IPC分类号： B32B1504
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/39 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/26
摘要： A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.
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公开(公告)号：US07056604B2
公开(公告)日：2006-06-06
申请号：US10452723
申请日：2003-06-03
申请人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
发明人： Tetsuya Kanbe , Akira Ishikawa , Ichiro Tamai , Yotsuo Yahisa , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshibumi Matsuda , Hiroyuki Kataoka , Toshinori Ono , Shinji Fukaya , Kazuhiro Ura , Naoto Endo , Tomoo Yamamoto
CPC分类号： G11B5/7325 , G11B5/012 , G11B5/39 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12847 , Y10T428/12854 , Y10T428/26
摘要： A magnetic recording system includes an in-plane magnetic recording medium having a magnetic layer fabricated on a single underlayer or on a plurality of underlayers respectively fabricated on a substrate; a driver unit for driving the in-plane magnetic recording medium in a write direction; a magnetic head having a read unit and a write unit; a unit for moving the magnetic head relative to the in-plane magnetic recording medium; and a read/write signal processing unit for reading an output signal from the magnetic head and writing an input signal to the magnetic recording media, wherein the read unit of the magnetic head is a magnetoresistive head and the single underlayer or at least one of the plurality of underlayers is made of Co-containing amorphous material or fine crystal material, or is made of alloy material, the alloy material having as the main components at least one element selected from a group consisting of Cr, Mo, V and Ta and containing at least one element selected from a group consisting of B, C, P and Bi. The magnetic recording system can be realized which can read and write high density information and have high reliability.
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公开(公告)号：US06887565B2
公开(公告)日：2005-05-03
申请号：US10306361
申请日：2002-11-27
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.
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公开(公告)号：US07338725B2
公开(公告)日：2008-03-04
申请号：US11072042
申请日：2005-03-03
CPC分类号： G11B5/7325 , G11B5/66 , Y10S428/90 , Y10T428/12465 , Y10T428/12854 , Y10T428/265
摘要： An inplane magnetic recording medium having high S/N and thermal stability and a reliable magnetic storage device having surface recording density of 50 megabit/mm2 or more is described. The magnetic recording medium includes magnetic layers formed on a nonmagnetic substrate with a plurality of ground layers therebetween, at least one of the ground layers formed from an alloy of a body-centered cubic structure containing Cr as a main component and B of from 2 atomic % to 12 atomic %. Main components of the magnetic layers include a lower magnetic layer containing Co and Cr of from 10 atomic % to 16 atomic %, with film thickness of from 1.5 nm to 4.5 nm, and an upper magnetic layer containing Co, coupling anti-ferromagnetically with the lower magnetic layer through nonmagnetic intermediate layers.
摘要翻译： 描述了具有高S / N和热稳定性的内置磁记录介质和具有50兆比特/平方毫米或更高的表面记录密度的可靠的磁存储装置。 磁记录介质包括形成在非磁性基底上的磁性层，其间具有多个接地层，至少一个接地层由以Cr为主要成分的体心立方结构的合金形成，B为2原子 ％至12原子％。 磁性层的主要成分包括含有10原子％〜16原子％的Co和Cr的下部磁性层，膜厚为1.5nm〜4.5nm，上部磁性层为Co，与铁素体 通过非磁性中间层降低磁性层。
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