公开(公告)号：US20110069410A1

公开(公告)日：2011-03-24

申请号：US12537982

申请日：2009-08-07

Applicant: Hidekazu KASHIWASE ,  Hiroyuki SUZUKI ,  Mitsuhiro SHODA ,  Takayoshi OHTSU ,  Kiyoshi HASHIMOTO

Inventor： Hidekazu KASHIWASE ,  Hiroyuki SUZUKI ,  Mitsuhiro SHODA ,  Takayoshi OHTSU ,  Kiyoshi HASHIMOTO

IPC: G11B21/02 ,  G11B5/60

CPC classification number: G11B5/8404 ,  G11B5/3136 ,  G11B5/455 ,  G11B5/6064

Abstract: A magnetic-recording-disk test-head. The magnetic-recording-disk test-head includes a slider, a test pad and a slider-surface-shape control mechanism. The slider includes a leading edge and a trailing edge. The test pad is disposed at a trailing-edge side of the slider and is configured to remove and to detect asperities on a magnetic-recording disk. The slider-surface-shape control mechanism is configured to change a shape of an air-bearing surface of the slider and is disposed at a leading-edge side of the slider.

Abstract translation: 磁记录盘测试头。 磁记录盘测试头包括滑块，测试垫和滑块表面形状控制机构。 滑块包括前缘和后缘。 测试垫设置在滑块的后缘侧，并且被配置为移除并检测磁记录盘上的凹凸。 滑块表面形状控制机构构造为改变滑块的空气轴承表面的形状并且设置在滑块的前缘侧。

公开(公告)号：US07532436B2

公开(公告)日：2009-05-12

申请号：US11223603

申请日：2005-09-09

Applicant: Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

Inventor： Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

IPC: G11B5/66

CPC classification number: G11B5/7325 ,  G11B5/31 ,  G11B5/656 ,  G11B5/66

Abstract: A longitudinal magnetic recording medium having a high medium S/N, with no problems in view of the overwrite characteristic, excellent in the bit error rate and sufficiently stable also to thermal fluctuations is provided. In one embodiment, a first underlayer, second underlayer, and a third underlayer are formed on a substrate and, further, a first magnetic layer, a spacer layer including Ru as a main ingredient, a second magnetic layer, and a third magnetic layer are formed in adjacent with each other in this order. The thickness of the second magnetic layer is made larger than the thickness of the third magnetic layer and the total for the concentrations of cobalt and platinum obtained in the second magnetic layer is not more than the total for the concentrations of cobalt and platinum contained in the third magnetic layer.

Abstract translation: 提供具有高介质S / N的纵向磁记录介质，考虑到重写特性没有问题，具有优异的误码率和足够稳定的热波动。 在一个实施例中，在基板上形成第一底层，第二底层和第三底层，此外，第一磁性层，包括Ru作为主要成分的间隔层，第二磁性层和第三磁性层是 以这种顺序彼此相邻地形成。 使第二磁性层的厚度大于第三磁性层的厚度，并且在第二磁性层中获得的钴和铂的浓度的总和不超过包含在第二磁性层中的钴和铂的浓度的总和 第三磁性层。

公开(公告)号：US07338725B2

公开(公告)日：2008-03-04

申请号：US11072042

申请日：2005-03-03

Applicant: Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

Inventor： Tetsuya Kanbe ,  Yotsuo Yahisa ,  Hiroyuki Suzuki ,  Hidekazu Kashiwase

IPC: G11B5/66 ,  G11B5/70

CPC classification number: G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/265

Abstract: 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.

Abstract translation: 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。

公开(公告)号：US07163756B2

公开(公告)日：2007-01-16

申请号：US10733928

申请日：2003-12-10

Applicant: Tomoo Yamamoto ,  Yotsuo Yahisa ,  Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Tetsuya Kanbe ,  Hiroyuki Suzuki

Inventor： Tomoo Yamamoto ,  Yotsuo Yahisa ,  Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Tetsuya Kanbe ,  Hiroyuki Suzuki

IPC: G11B5/66

CPC classification number: G11B5/732 ,  G11B5/66 ,  G11B5/7325

Abstract: A large-capacity, low-cost, longitudinal magnetic recording medium capable of ultra-high-density recording of 70 Gigabits or more per square inch is disclosed. The longitudinal magnetic recording medium of the present invention comprises a first seed layer, a second seed layer, a first underlayer, a second underlayer, and a magnetic layer, which are formed on a nonmagnetic substrate in this order. A material containing at least Al and any one of Ru and Re is used to form the second seed layer, and a material containing at least any one of Co and Ni and one or both of Al and Ti is used to form the first underlayer. It is also possible to use Cr or a Cr alloy containing Cr and at least one element selected from the constituent element group A consisting of Ti, Mo, and W for forming the second seed layer.

Abstract translation: 公开了能够以每平方英寸70吉比特或更多的超高密度记录的大容量，低成本的纵向磁记录介质。 本发明的纵向磁记录介质包括依次形成在非磁性基板上的第一种子层，第二籽晶层，第一底层，第二底层和磁性层。 使用至少包含Al和Ru和Re中的任何一种的材料来形成第二种子层，并且使用包含Co和Ni中的至少一种以及Al和Ti中的一种或两种的材料来形成第一底层。 也可以使用含有Cr的Cr或Cr合金和选自由Ti，Mo和W构成的构成元素组A中的至少一种元素来形成第二种子层。

公开(公告)号：US20060057429A1

公开(公告)日：2006-03-16

申请号：US11223603

申请日：2005-09-09

Applicant: Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

Inventor： Tatsuya Hinoue ,  Hidekazu Kashiwase ,  Hiroyuki Suzuki ,  Tomoo Yamamoto

IPC: G11B5/66

CPC classification number: G11B5/7325 ,  G11B5/31 ,  G11B5/656 ,  G11B5/66

Abstract: A longitudinal magnetic recording medium having a high medium S/N, with no problems in view of the overwrite characteristic, excellent in the bit error rate and sufficiently stable also to thermal fluctuations is provided. In one embodiment, a first underlayer, second underlayer, and a third underlayer are formed on a substrate and, further, a first magnetic layer, a spacer layer including Ru as a main ingredient, a second magnetic layer, and a third magnetic layer are formed in adjacent with each other in this order. The thickness of the second magnetic layer is made larger than the thickness of the third magnetic layer and the total for the concentrations of cobalt and platinum obtained in the second magnetic layer is not more than the total for the concentrations of cobalt and platinum contained in the third magnetic layer.

公开(公告)号：US20050084716A1

公开(公告)日：2005-04-21

申请号：US10985045

申请日：2004-11-10

Applicant: Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

Inventor： Tetsuya Kanbe ,  Hiroyuki Suzuki ,  Yotsuo Yahisa ,  Yoshiyuki Hirayama ,  Hidekazu Kashiwase

IPC: C22C19/07 ,  G11B5/64 ,  G11B5/66 ,  G11B5/73 ,  G11B5/738 ,  H01F10/16 ,  H01F10/30 ,  G11B5/147

CPC classification number: G11B5/7325 ,  G11B5/66 ,  Y10S428/90 ,  Y10T428/1121 ,  Y10T428/12465 ,  Y10T428/12854 ,  Y10T428/12861

Abstract: It is an object of the present invention to provide a high reliability magnetic storage apparatus capable of performing writing and reading back of high density information. The magnetic storage apparatus is so configured as to have a longitudinal magnetic recording medium including: a magnetic layer formed on a non-magnetic substrate via a plurality of underlayers; the magnetic layer including a lower magnetic layer containing Ru in an amount of not less than 3 at % to not more than 30 at %, and Cr in an amount of not less than 0 at % to not more than 18 at %, and further containing at least one of B or C in an amount of not less than 0 at % to not more than 20 at %, and an upper magnetic layer containing Co as a main component disposed thereon via a non-magnetic intermediate layer.

Abstract translation: 本发明的目的是提供一种能够执行高密度信息的写入和读回的高可靠性磁存储装置。 磁存储装置被配置为具有纵向磁记录介质，其包括：通过多个底层在非磁性基板上形成的磁性层; 所述磁性层包括含有不小于3原子％至不超过30原子％的量的Ru的下磁性层，并且不少于0原子％至不大于18原子％的Cr， 含有不小于0at％至不超过20at％的B或C中的至少一个，以及经由非磁性中间层设置在其上的Co作为主要成分的上磁性层。

公开(公告)号：US07704613B2

公开(公告)日：2010-04-27

申请号：US11415604

申请日：2006-05-01

Applicant: Hiroyuki Suzuki ,  Hidekazu Kashiwase ,  Akira Morinaga ,  Tatsuya Hinoue

Inventor： Hiroyuki Suzuki ,  Hidekazu Kashiwase ,  Akira Morinaga ,  Tatsuya Hinoue

IPC: G11B5/66

CPC classification number: G11B5/7325 ,  G11B5/656 ,  G11B5/66

Abstract: A bit error rate is improved and, at the same time, an aging change due to thermal fluctuation is decreased. In one embodiment, a magnetic recording medium has first, second, third, and fourth magnetic layers stacked over the underlayer film on a substrate. The product (Brt2) of the residual magnetic flux density and film thickness of the second magnetic layer is smaller than the product (Brt3) of the residual magnetic flux density and film thickness of the third magnetic layer. The second magnetic layer has a thickness larger than that of the third magnetic layer and is anti-ferromagnetically coupled with the first magnetic layer by way of the first non-magnetic intermediate layer. The fourth magnetic layer is formed by way of a second non-magnetic intermediate layer above the third magnetic layer. The product (Brt4) of the residual magnetic flux density and film thickness of the fourth magnetic layer is from about 47% to 52% of the product (Brt_total) of the residual magnetic flux density and film thickness of the entire magnetic layers in a state of residual magnetization with the external magnetic field removed.

Abstract translation: 改善了误码率，同时由于热波动引起的老化变化也降低。 在一个实施例中，磁记录介质具有层叠在基底上的下层膜上的第一，第二，第三和第四磁性层。 第二磁性层的剩余磁通密度和膜厚的乘积（Brt2）小于第三磁性层的剩余磁通密度和膜厚的乘积（Brt3）。 第二磁性层的厚度大于第三磁性层的厚度，并通过第一非磁性中间层与第一磁性层反铁磁耦合。 第四磁性层通过在第三磁性层上方的第二非磁性中间层形成。 剩余磁通密度和第四磁性层的膜厚的乘积（Brt4）为剩余磁通密度的乘积的约47％至52％（Brt_total）和处于整个状态的整个磁性层的膜厚度 的剩余磁化与外部磁场去除。

公开(公告)号：US07545604B2

公开(公告)日：2009-06-09

申请号：US11317344

申请日：2005-12-22

Applicant: Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

Inventor： Tatsuya Hinoue ,  Yotsuo Yahisa ,  Tomoo Yamamoto ,  Joe Inagaki ,  Hiroyuko Suzuki ,  Hidekazu Kashiwase

IPC: G11B5/66 ,  B32B3/02

CPC classification number: G11B5/65 ,  G11B5/656 ,  G11B5/66 ,  H01F10/16 ,  H01F10/265

Abstract: In one embodiment, a magnetic recording medium comprises an underlying film, a magnetic film and a protective film formed in this order on a substrate. The magnetic film is a cobalt-base alloy film containing chromium and has a plurality of magnetic layers stacked without interposition of any non-magnetic layer. The plural magnetic layers comprise first, second and third magnetic layers. The first magnetic layer is disposed between the underlying film and the second magnetic layer. The second magnetic layer is disposed between the first magnetic layer and the third magnetic layer. The third magnetic layer is disposed between the second magnetic layer and the protective film. The concentration of chromium contained in the first magnetic layer is lower than that of chromium contained in the second magnetic layer. The thickness of the first magnetic layer is smaller than that of the second magnetic layer. The magnetic layers which overlie the first magnetic layer further contain platinum and boron. The concentration of chromium contained in the third magnetic layer is lower than that of chromium contained in the second magnetic layer.

Abstract translation: 在一个实施例中，磁记录介质包括在衬底上依次形成的下面的膜，磁性膜和保护膜。 磁性膜是含有铬的钴基合金膜，并且具有堆叠而不插入任何非磁性层的多个磁性层。 多个磁性层包括第一，第二和第三磁性层。 第一磁性层设置在下面的膜和第二磁性层之间。 第二磁性层设置在第一磁性层和第三磁性层之间。 第三磁性层设置在第二磁性层和保护膜之间。 第一磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。 第一磁性层的厚度小于第二磁性层的厚度。 覆盖在第一磁性层上的磁性层还含有铂和硼。 第三磁性层中含有的铬的浓度低于第二磁性层中含有的铬的浓度。