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21. 发明授权

US5922456A Longitudal magnetic recording medium having a multi-layered underlayer and magnetic storage apparatus using such magnetic recording medium 失效
标题翻译：具有多层底层的纵向磁记录介质和使用这种磁记录介质的磁存储装置
公开(公告)号：US5922456A
公开(公告)日：1999-07-13
申请号：US922277
申请日：1997-09-03
申请人： Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai , Tetsuya Kanbe , Tomoo Yamamoto
发明人： Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai , Tetsuya Kanbe , Tomoo Yamamoto
IPC分类号： G11B5/66 , G11B5/012 , G11B5/39 , G11B5/64 , G11B5/667 , G11B5/73 , G11B5/738
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/012 , G11B5/3903 , G11B5/3967 , G11B5/7325 , G11B2005/3996 , Y10S428/90 , Y10T428/26 , Y10T428/265
摘要： A longitudinal magnetic recording medium and a magnetic storage apparatus using the longitudinal magnetic recording medium. The recording medium has a multi-layered underlayer and a magnetic layer formed on it. The underlayer has a first layer of a body-centered cubic structure, a second layer of a hexagonal-close packed structure formed on the first layer, and a third layer of a bcc structure formed on the second layer. The underlayer may further have a fourth layer of an hcp structure layer formed on the third layer.
摘要翻译：纵向磁记录介质和使用纵向磁记录介质的磁存储装置。记录介质具有形成在其上的多层底层和磁性层。底层具有体心立方结构的第一层，形成在第一层上的六方密堆积结构的第二层和形成在第二层上的bcc结构的第三层。底层可以进一步具有形成在第三层上的第四层hcp结构层。

22. 发明申请

US20120154948A1 PERPENDICULAR MAGNETIC RECORDING MEDIA HAVING LOW MEDIUM NOISE AND SYSTEMS USING THE SAME 有权
标题翻译：具有低介质噪声和系统的全磁性记录介质
公开(公告)号：US20120154948A1
公开(公告)日：2012-06-21
申请号：US12975197
申请日：2010-12-21
申请人： Ichiro Tamai , Yotsuo Yahisa , Akemi Hirotsune , Kiwamu Tanahashi
发明人： Ichiro Tamai , Yotsuo Yahisa , Akemi Hirotsune , Kiwamu Tanahashi
IPC分类号： G11B5/667 , G11B5/62 , G11B21/02
CPC分类号： G11B5/65 , G11B5/667 , G11B5/732 , G11B5/7325
摘要： In one embodiment, a perpendicular magnetic recording medium includes a substrate, a soft-magnetic underlayer above the substrate, a seed layer above the soft-magnetic underlayer, a first intermediate layer above the seed layer, a second intermediate layer above the first intermediate layer, a recording layer above the second intermediate layer, and a protective layer above the recording layer. The second intermediate layer includes an Ru alloy having an element selected from a group consisting of: Ti in a range from about 20 at. % to about 50 at. %, Nb in a range from about 20 at. % to about 50 at. %, Al in a range from about 20 at. % to about 40 at. %, Ta in a range from about 30 at. % to about 50 at. %, and Si in a range about 20 at. % to about 40 at. %. Other magnetic media and systems using this media are described according to more embodiments.
摘要翻译：在一个实施例中，垂直磁记录介质包括基底，在基底上方的软磁性底层，软磁性底层上方的晶种层，种子层上方的第一中间层，第一中间层上方的第二中间层，第二中间层上方的记录层和记录层上方的保护层。第二中间层包括具有选自以下的元素的Ru合金：Ti为约20at。％至约50。％，Nb在约20英寸的范围内。％至约50。％，Al在约20英寸的范围内。％至约40 at。％，Ta在约30 at范围内。％至约50。％，Si在约20at。％至约40 at。％。根据更多实施例描述使用该介质的其它磁性介质和系统。

23. 发明申请

US20090257144A1 Perpendicular magnetic recording medium and magnetic storage device using the same 有权
标题翻译：垂直磁记录介质和使用其的磁存储装置
公开(公告)号：US20090257144A1
公开(公告)日：2009-10-15
申请号：US12384850
申请日：2009-04-08
申请人： Ichiro Tamai , Kiwamu Tanahashi
发明人： Ichiro Tamai , Kiwamu Tanahashi
IPC分类号： G11B21/02 , G11B5/667
CPC分类号： G11B5/66 , G11B5/65
摘要： Embodiments of the present invention provide a perpendicular magnetic recording medium that reduces the noise of granular recording layers, obtains sufficient overwrite characteristic that suppresses an increase in the magnetic cluster size, and allows high-density recording. According to one embodiment, a perpendicular magnetic recording medium comprising substrate having thereon at least soft magnetic layer, nonmagnetic intermediate layer, a perpendicular recording layer and protective layer formed in that order. The perpendicular recording layer consists of three or more layers of first recording layer, a second recording layer, and a third recording layer from the side nearer to the substrate. The first recording layer and the second recording layer have a granular structure comprising a grain boundary of an oxide surrounding ferromagnetic crystal grains containing Co and Pt, and the third recording layer has a non-granular structure mainly comprising Co and not containing an oxide. The grain boundary of the first recording layer contains Si, Cr and oxygen, and at least one element selected from Ti, Ta and Nb, and the grain boundary of the second recording layer contains Cr and oxygen, or contains Cr and oxygen and at least one element selected from Si, W and V.
摘要翻译：本发明的实施例提供一种降低粒状记录层噪声的垂直磁记录介质，获得抑制磁簇大小增加的足够的重写特性，并允许高密度记录。根据一个实施例，一种垂直磁记录介质，其包括至少在其上形成有软磁性层，非磁性中间层，垂直记录层和保护层的基板。垂直记录层由三层或三层以上的第一记录层，第二记录层和第三记录层组成。第一记录层和第二记录层具有包含包含Co和Pt的铁磁晶粒的氧化物的晶界的颗粒结构，并且第三记录层具有主要包含Co且不含氧化物的非颗粒结构。第一记录层的晶界包含Si，Cr和氧，并且选自Ti，Ta和Nb中的至少一种元素，第二记录层的晶界包含Cr和氧，或含有Cr和氧，至少一个元素选自Si，W和V.

24. 发明授权

US07050253B2 Magnetic recording media and magnetic storage apparatus using the same 失效
公开(公告)号：US07050253B2
公开(公告)日：2006-05-23
申请号：US10404071
申请日：2003-04-02
申请人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
发明人： Tetsuya Kanbe , Ichiro Tamai , Yuzuru Hosoe , Kiwamu Tanahashi , Yoshio Takahashi , Fumiyoshi Kirino , Nagatugu Koiso , Satoshi Matsunuma
IPC分类号： G11B5/02
CPC分类号： G11B5/7325 , C23C14/185 , G11B5/00 , G11B5/012 , G11B2005/001 , G11B2005/0016 , Y10S428/90 , Y10S428/928 , Y10T428/1107 , Y10T428/1121 , Y10T428/12507 , Y10T428/1266 , Y10T428/12667 , Y10T428/12674 , Y10T428/12819 , Y10T428/12826 , Y10T428/12868 , Y10T428/12944 , Y10T428/265
摘要： In a magnetic storage apparatus having a magnetic recording medium, a drive unit for driving this medium in a prespecified recording direction, a magnetic head assembly including a recorder section and reproduction section, means for causing the magnetic head to move relatively with respect to the magnetic record medium, and a record/playback signal processor means for performing signal inputting to the magnetic head and for effecting reproduction of an output signal from the magnetic head, the reproduction section of said magnetic head is composed of a magnetic head of the magnetoresistance effect type, while said magnetic record medium is structured including a substrate and a magnetic layer formed thereover with one or several underlayers being sandwiched therebetween, wherein at least one of the underlayers is a specific layer that is made of amorphous or microcrystalline materials containing therein Ni as the principal or main component thereof and further containing at least one kind of element as selected from the group consisting of Nb and Ta.

25. 发明授权

US06709768B2 Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium 失效
标题翻译：磁记录介质及其制造方法和使用这种磁记录介质的磁记录系统
公开(公告)号：US06709768B2
公开(公告)日：2004-03-23
申请号：US10078399
申请日：2002-02-21
申请人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
发明人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
IPC分类号： G11B564
CPC分类号： G11B5/64 , G11B5/66 , G11B5/84 , Y10T428/12465 , Y10T428/12875 , Y10T428/31
摘要： A magnetic recording medium having a high coercive force and being capable of high-density writing/reading has a substrate, a soft magnetic layer, a non-magnetic intermediate layer, a magnetic layer, a protective layer, and a lubricating layer. The magnetic layer is characterized by stacking fault density and dispersion of particle diameters. The stacking fault density should preferably be no larger than 0.05, and the dispersion of particle diameters should preferably be no larger than 0.4. The magnetic recording medium has a coercive force larger than 4000 Oe, is highly stable to thermal decay, and has a recording density in excess of 50 Gbit/in2.
摘要翻译：具有高矫顽磁力并且能够进行高密度写入/读取的磁记录介质具有基板，软磁层，非磁性中间层，磁性层，保护层和润滑层。磁性层的特征在于堆垛层错密度和粒径分散。堆垛层错密度优选为0.05以下，粒径分布优选为0.4以下。磁记录介质具有大于4000Oe的矫顽力，对热衰减高度稳定，并且具有超过50Gbit / in 2的记录密度。

26. 发明授权

US06403240B1 Magnetic recording media and magnetic recording system using the same 失效
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.

27. 发明授权

US07641774B2 Manufacturing process for perpendicular magnetic recording medium 失效
标题翻译：垂直磁记录介质的制造工艺
公开(公告)号：US07641774B2
公开(公告)日：2010-01-05
申请号：US11259409
申请日：2005-10-25
申请人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
发明人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
IPC分类号： C23C14/34
CPC分类号： C23C14/3414 , G11B5/65 , G11B5/66 , G11B5/667 , G11B5/851
摘要： A perpendicular magnetic recording medium is manufactured having excellent thermal stability and recording performances across the entire disk surface. In one embodiment, the recording layer includes at least two layers deposited by using a reactive sputtering method under an oxygen-containing atmosphere at a deposition rate larger than the second recording layer which is formed on the first recording layer while depositing the first recording layer on the intermediate layer.
摘要翻译：制造了具有优异的热稳定性和整个盘表面的记录性能的垂直磁记录介质。在一个实施例中，记录层包括通过使用反应溅射法在含氧气氛下以大于形成在第一记录层上的第二记录层的沉积速率沉积的至少两层，同时将第一记录层沉积在中间层。

28. 发明申请

US20110122525A1 MAGNETIC RECORDING MEDIUM USING LAYERS HAVING HIGHER- AND LOWER-HK ANISOTROPIC MAGNETIC FIELDS 有权
标题翻译：使用具有高，低HK HKS磁场的层的磁记录介质
公开(公告)号：US20110122525A1
公开(公告)日：2011-05-26
申请号：US12938214
申请日：2010-11-02
申请人： Hiroaki Nemoto , Kiwamu Tanahashi , Hiroyuki Nakagawa
发明人： Hiroaki Nemoto , Kiwamu Tanahashi , Hiroyuki Nakagawa
IPC分类号： G11B5/66 , G11B21/02
CPC分类号： G11B5/65 , G11B5/66
摘要： According to one embodiment, a magnetic recording medium includes a magnetic recording layer formed above a substrate, comprising: a first magnetic layer formed from a [Co/Pt]n multilayered film, wherein the first magnetic layer has a face-centered cubic (fcc) (111) crystal structure, the (111) direction being perpendicular to a film surface thereof, and a second magnetic layer comprising a CoCrPt or CoCrPt alloy film formed above the first magnetic layer, wherein the second magnetic layer has a hexagonal close packed (hcp) (00.1) crystal structure, the (00.1) direction being perpendicular to a film surface thereof. According to another embodiment, a system includes a magnetic recording medium as described above, a magnetic head for reading from and/or writing to the magnetic recording medium, a magnetic head slider for supporting the magnetic head, and a control unit coupled to the magnetic head for controlling operation of the magnetic head.
摘要翻译：根据一个实施例，磁记录介质包括形成在衬底上的磁记录层，包括：由[Co / Pt] n多层膜形成的第一磁性层，其中第一磁性层具有面心立方（fcc ）（111）晶体结构，（111）方向垂直于其膜表面，以及第二磁性层，其包含形成在第一磁性层上方的CoCrPt或CoCrPt合金膜，其中第二磁性层具有六方密堆积 hcp）（00.1）晶体结构，（00.1）方向垂直于其膜表面。根据另一个实施例，一种系统包括如上所述的磁记录介质，用于从磁记录介质读取和/或写入磁头的磁头，用于支撑磁头的磁头滑块，以及耦合到磁头的控制单元用于控制磁头的操作。

29. 发明申请

US20060086606A1 Method for manufacturing perpendicular magnetic recording medium 有权
标题翻译：制造垂直磁记录介质的方法
公开(公告)号：US20060086606A1
公开(公告)日：2006-04-27
申请号：US11253431
申请日：2005-10-18
申请人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
发明人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
IPC分类号： C23C14/32 , C23C14/00
CPC分类号： G11B5/851 , C23C14/0688 , C23C14/345 , C23C14/3492 , G11B5/65 , G11B5/667 , G11B5/7325 , H01J37/34 , H01J37/3426
摘要： Embodiments of the invention provide a manufacturing method which permits a high quality perpendicular magnetic recording medium to be manufactured with a high yield by preventing abnormal discharge which sputters particles from the target. In one embodiment, while the perpendicular magnetic recording medium is formed, DC pulses are applied to the target. During the reversal period (Reversal Time) between sputtering periods, a voltage of the opposite polarity is applied. During the sputtering period, a negative voltage is applied which biases the target surface to a negative potential, causing Ar+ to collide with and sputter CoCrPt and SiO2 for deposition on the intermediate layer. The top surface of the insulation material (SiO2) on the target is charged by Ar+ to have a voltage larger than the target voltage. However, arcing can be prevented since the charge on the surface of the insulation material is neutralized due to a positive voltage applied to the target during the non-sputtering period.
摘要翻译：本发明的实施方式提供一种制造方法，其可以通过防止从目标物喷射颗粒的异常放电，从而以高产率制造高质量的垂直磁记录介质。在一个实施例中，当形成垂直磁记录介质时，将DC脉冲施加到目标。在溅射期间的反转时间（反转时间）期间，施加相反极性的电压。在溅射期间，施加负电压，将目标表面偏压到负电位，导致Ar +与CoCrPt和SiO 2 2碰撞并溅射以沉积在中间层上。目标上的绝缘材料（SiO 2）的顶表面由Ar +充电以具有大于目标电压的电压。然而，由于在非溅射期间由于施加到靶的正电压而使绝缘材料的表面上的电荷中和，因此可以防止电弧。

30. 发明授权

US08795478B2 Method for manufacturing perpendicular magnetic recording medium 有权
标题翻译：制造垂直磁记录介质的方法
公开(公告)号：US08795478B2
公开(公告)日：2014-08-05
申请号：US11253431
申请日：2005-10-18
申请人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
发明人： Yoshinori Honda , Takayuki Ichihara , Hiroyuki Nakagawa , Kiwamu Tanahashi
IPC分类号： C23C14/00 , C23C14/32 , G11B5/66 , C23C14/06 , G11B5/851 , H01J37/34 , C23C14/34 , G11B5/73 , G11B5/65 , G11B5/667
CPC分类号： G11B5/851 , C23C14/0688 , C23C14/345 , C23C14/3492 , G11B5/65 , G11B5/667 , G11B5/7325 , H01J37/34 , H01J37/3426
摘要： Embodiments of the invention provide a manufacturing method which permits a high quality perpendicular magnetic recording medium to be manufactured with a high yield by preventing abnormal discharge which sputters particles from the target. In one embodiment, while the perpendicular magnetic recording medium is formed, DC pulses are applied to the target. During the reversal period (Reversal Time) between sputtering periods, a voltage of the opposite polarity is applied. During the sputtering period, a negative voltage is applied which biases the target surface to a negative potential, causing Ar+ to collide with and sputter CoCrPt and SiO2 for deposition on the intermediate layer. The top surface of the insulation material (SiO2) on the target is charged by Ar+ to have a voltage larger than the target voltage. However, arcing can be prevented since the charge on the surface of the insulation material is neutralized due to a positive voltage applied to the target during the non-sputtering period.
摘要翻译：本发明的实施方式提供一种制造方法，其可以通过防止从目标物喷射颗粒的异常放电，从而以高产率制造高质量的垂直磁记录介质。在一个实施例中，当形成垂直磁记录介质时，将DC脉冲施加到目标。在溅射期间的反转时间（反转时间）期间，施加相反极性的电压。在溅射期间，施加负电压，将目标表面偏压到负电位，导致Ar +与CoCrPt和SiO 2碰撞并溅射以沉积在中间层上。靶材上的绝缘材料（SiO2）的上表面被Ar +充电以具有大于目标电压的电压。然而，由于在非溅射期间由于施加到靶的正电压而使绝缘材料的表面上的电荷中和，因此可以防止电弧。

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