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1. 发明授权

US10388350B2 Memory system, semiconductor storage device, and signal processing system 有权
公开(公告)号：US10388350B2
公开(公告)日：2019-08-20
申请号：US15911211
申请日：2018-03-05
申请人： Kabushiki Kaisha Toshiba
发明人： Daisuke Saida , Yousuke Isowaki , Michael Arnaud Quinsat , Kenichiro Yamada , Kosuke Tatsumura
IPC分类号： G11C11/16 , G06N7/00
摘要： A memory system has a nonvolatile memory having a plurality of readable and writable memory cells, a write voltage control unit that controls at least one of a voltage value and a pulse width of a write voltage of the nonvolatile memory in accordance with a weight of a signal processing path or a signal processing node, a write unit that writes data in two or more memory cell groups among the plurality of memory cells using the write voltage controlled by the write voltage control unit, a reversal probability detection unit that detects a reversal probability of the memory cell group when writing data is written by the write unit, and a weight conversion unit that converts the detected reversal probability into a weight.

2. 发明授权

US09214179B2 Magnetic recording medium, method of manufacturing the same, and magnetic recording/reproduction apparatus 有权
标题翻译：磁记录介质及其制造方法以及磁记录/再现设备
公开(公告)号：US09214179B2
公开(公告)日：2015-12-15
申请号：US14055719
申请日：2013-10-16
申请人： Kabushiki Kaisha Toshiba
发明人： Tomoyuki Maeda , Yousuke Isowaki , Akira Watanabe
IPC分类号： C23C14/34 , G11B5/855 , G11B5/73 , G11B5/74
CPC分类号： G11B5/855 , G11B5/7325 , G11B5/746
摘要： According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The perpendicular magnetic recording layer includes a magnetic dot pattern. The perpendicular magnetic recording layer is made of an alloy material containing one element selected from iron and cobalt, and one element selected from platinum and palladium. This alloy material has the L10 structure, and is (001)-oriented. The auxiliary layer includes a dot-like first region covered with the magnetic dot pattern, and a second region not covered with the magnetic dot pattern. The first region is made of a (100)-oriented nickel oxide. The second region contains nickel used in the first region as a main component.
摘要翻译：根据一个实施例，磁记录介质包括基板，形成在基板上的辅助层以及形成在辅助层上的至少一个垂直磁记录层。垂直磁记录层包括磁点图形。垂直磁记录层由含有选自铁和钴的一种元素的合金材料和选自铂和钯的一种元素制成。该合金材料具有L10结构，为（001）取向。辅助层包括用磁点图案覆盖的点状第一区域和未被磁点图案覆盖的第二区域。第一区域由（100）取向的氧化镍制成。第二区域包含在第一区域中使用的镍作为主要成分。

3. 发明授权

US09275662B2 Magnetic head, magnetic recording and reproducing apparatus, and method of manufacturing magnetic head 有权
标题翻译：磁头，磁记录和再现装置以及制造磁头的方法
公开(公告)号：US09275662B2
公开(公告)日：2016-03-01
申请号：US14642980
申请日：2015-03-10
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Yousuke Isowaki , Kenichiro Yamada , Masayuki Takagishi , Hitoshi Iwasaki
IPC分类号： G11B5/39
CPC分类号： G11B5/3954
摘要： A magnetic head of an embodiment includes: a first electrode being a magnetic body having a magnetic shielding property; a first signal detector disposed on the first electrode and being a differential magnetoresistive effect element; a second electrode disposed on the first signal detector; an insulating layer disposed on the second electrode; a third electrode disposed on the insulating layer; a second signal detector disposed on the third electrode and being a differential magnetoresistive effect element; and a fourth electrode disposed on the second signal detector and being a magnetic body having a magnetic shielding property. At least one of the second electrode and the third electrode is a nonmagnetic metal.
摘要翻译：实施方式的磁头包括：具有磁屏蔽性的磁体的第一电极; 第一信号检测器，设置在第一电极上并且是差分磁阻效应元件; 设置在所述第一信号检测器上的第二电极; 设置在所述第二电极上的绝缘层; 设置在所述绝缘层上的第三电极; 第二信号检测器，设置在第三电极上，并且是差分磁阻效应元件; 以及第四电极，设置在第二信号检测器上，并且是具有磁屏蔽性质的磁体。第二电极和第三电极中的至少一个是非磁性金属。

4. 发明授权

US08953286B2 Magnetoresistive element with aluminum or iron concentration ratio changed in film-thickness direction 有权
标题翻译：具有铝或铁浓度比的磁阻元件在膜厚度方向上变化
公开(公告)号：US08953286B2
公开(公告)日：2015-02-10
申请号：US14193172
申请日：2014-02-28
申请人： Kabushiki Kaisha Toshiba
发明人： Naoki Hase , Masayuki Takagishi , Susumu Hashimoto , Shuichi Murakami , Yousuke Isowaki , Masaki Kado , Hitoshi Iwasaki
IPC分类号： G11B5/39 , G11B5/31
CPC分类号： G01R33/093 , G11B5/3906 , G11B5/3912 , G11B5/398 , H01F10/1936 , H01F10/3268 , H01F10/3295 , H01L43/02 , H01L43/08 , Y10T428/1121
摘要： A magnetoresistive element according to an embodiment includes: a magnetoresistance effect film including: a first and second magnetic films; and an intermediate film disposed between the first and second magnetic films, at least one of the first and second magnetic films being formed of a Heusler alloy expressed as Co100-x(AyB1.0-y)x (40 at %≦x≦60 at %, 0.3≦y≦0.7) where A is an alloy containing at least Fe and Mn, and B is an alloy containing at least Si, Al, and Ge, a composition of the at least one of the first and second magnetic films being changed in a film-thickness direction so that a ratio of Fe/(Fe+Mn) is less than 60% in a first region disposed near an interface with the intermediate film in the film-thickness direction, and is 60% or more in a second region that is disposed at more distance from the interface than the first region in the film-thickness direction.
摘要翻译：根据实施例的磁阻元件包括：磁阻效应膜，包括：第一和第二磁性膜; 以及设置在所述第一和第二磁性膜之间的中间膜，所述第一和第二磁性膜中的至少一个由表示为Co100-x（AyB1.0-y）x（40at％＆nlE; x＆amp; 60at％，0.3＆nlE; y＆nlE; 0.7）其中A是至少含有Fe和Mn的合金，B是至少含有Si，Al和Ge的合金，第一和第二磁性膜在膜厚度方向上变化，使得在设置在与中间膜在膜厚度方向上的界面附近的第一区域中Fe /（Fe + Mn）的比率小于60％，并且为60％或更多的第二区域，其设置在比膜厚度方向上比第一区域更接近界面的位置。

5. 发明申请

US20140139951A1 MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING/REPRODUCTION APPARATUS 审中-公开
标题翻译：磁记录介质和磁记录/再现装置
公开(公告)号：US20140139951A1
公开(公告)日：2014-05-22
申请号：US14163871
申请日：2014-01-24
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Tomoyuki Maeda , Yousuke Isowaki , Akira Watanabe , Akihiko Takeo
IPC分类号： G11B5/74
CPC分类号： G11B5/746 , G11B5/65 , G11B5/66 , G11B5/7325 , G11B5/855
摘要： According to one embodiment, a perpendicular magnetic recording medium includes a nonmagnetic interlayer formed on a nonmagnetic substrate, an antiferromagnetic layer having a thickness of 2 to 30 nm, a first nonmagnetic underlayer having a thickness of 0.2 to 5 nm, a first bit patterned ferromagnetic layer, a first bit patterned nonmagnetic layer, and a second bit patterned ferromagnetic layer.
摘要翻译：根据一个实施例，垂直磁记录介质包括形成在非磁性基板上的非磁性中间层，厚度为2至30nm的反铁磁层，厚度为0.2至5nm的第一非磁性底层，第一位图案化铁磁体层，第一位图案非磁性层和第二位图案化铁磁层。

6. 发明申请

US20140042013A1 MAGNETIC RECORDING MEDIUM, METHOD OF MANUFACTURING THE SAME, AND MAGNETIC RECORDING/REPRODUCTION APPARATUS 有权
标题翻译：磁记录介质，其制造方法和磁记录/再现装置
公开(公告)号：US20140042013A1
公开(公告)日：2014-02-13
申请号：US14055719
申请日：2013-10-16
申请人： Kabushiki Kaisha Toshiba
发明人： Tomoyuki Maeda , Yousuke Isowaki , Akira Watanabe
IPC分类号： G11B5/855
CPC分类号： G11B5/855 , G11B5/7325 , G11B5/746
摘要： According to one embodiment, a magnetic recording medium includes a substrate, an auxiliary layer formed on the substrate, and at least one perpendicular magnetic recording layer formed on the auxiliary layer. The perpendicular magnetic recording layer includes a magnetic dot pattern. The perpendicular magnetic recording layer is made of an alloy material containing one element selected from iron and cobalt, and one element selected from platinum and palladium. This alloy material has the L10 structure, and is (001)-oriented. The auxiliary layer includes a dot-like first region covered with the magnetic dot pattern, and a second region not covered with the magnetic dot pattern. The first region is made of a (100)-oriented nickel oxide. The second region contains nickel used in the first region as a main component.
摘要翻译：根据一个实施例，磁记录介质包括基板，形成在基板上的辅助层以及形成在辅助层上的至少一个垂直磁记录层。垂直磁记录层包括磁点图形。垂直磁记录层由含有选自铁和钴的一种元素的合金材料和选自铂和钯的一种元素制成。该合金材料具有L10结构，为（001）取向。辅助层包括用磁点图案覆盖的点状第一区域和未被磁点图案覆盖的第二区域。第一区域由（100）取向的氧化镍制成。第二区域包含在第一区域中使用的镍作为主要成分。

7. 发明授权

US09489970B2 Magnetic head and magnetic recording and reproducing apparatus 有权
公开(公告)号：US09489970B2
公开(公告)日：2016-11-08
申请号：US14927549
申请日：2015-10-30
申请人： Kabushiki Kaisha Toshiba
发明人： Yousuke Isowaki , Kenichiro Yamada , Masayuki Takagishi
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3932 , G11B5/3954 , G11B5/398
摘要： A magnetic head of an embodiment includes a stack, side shields, and a first and a second magnetic shield. The stack includes a pin layer having a fixed magnetization direction, a first free layer having a magnetization direction to change in accordance with an external magnetic field, a second free layer antiferromagnetically exchange-coupled with the first free layer and having a magnetization direction to change in accordance with the field, and an antiferromagnetic layer exchange-coupled with the second free layer. A magnetic field is applied from the side shields to the first and second free layers, and a direction of the magnetic field is substantially parallel to the magnetization direction of one of the first and second free layers and substantially antiparallel to the magnetization direction of the other, and a magnetic volume of the one is larger than a magnetic volume of the other.

8. 发明授权

US09373356B2 Magnetic recording and reproducing device and magnetic recording and reproducing method 有权
标题翻译：磁记录和再现装置以及磁记录和再现方法
公开(公告)号：US09373356B2
公开(公告)日：2016-06-21
申请号：US14887998
申请日：2015-10-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Kenichiro Yamada , Masayuki Takagishi , Tomoyuki Maeda , Yousuke Isowaki , Naoyuki Narita , Shuichi Murakami
IPC分类号： G11B5/86 , G11B5/02 , G11B20/12 , G11B5/012
CPC分类号： G11B20/1217 , G11B5/012 , G11B5/02 , G11B5/82 , G11B2020/1238
摘要： According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a recording unit, and a reproducing unit. The magnetic recording medium includes a first track including first and second sub-tracks extending in a first direction. The second sub-track is arranged with the first sub-track in a second direction intersecting the first direction. The recording unit records information in the first and second sub-tracks. The reproducing unit reproduces the information recorded in the first and second sub-tracks while opposing the first, second sub-tracks, and a boundary between the first and second sub-tracks. The first sub-track includes first magnetic recording components including first and second components. The second sub-track includes second magnetic recording components including third and fourth components. A first recording symbol is formed of the first and third components. A second recording symbol is formed of the second and fourth components.
摘要翻译：根据一个实施例，磁记录和再现装置包括磁记录介质，记录单元和再现单元。磁记录介质包括第一轨道，该第一轨道包括沿第一方向延伸的第一和第二子轨道。第二子轨道与第一子轨道沿与第一方向相交的第二方向布置。记录单元将信息记录在第一和第二子轨道中。再现单元再现与第一和第二子轨道相对的第一和第二子轨道中记录的信息，以及第一和第二子轨道之间的边界。第一子轨道包括包括第一和第二分量的第一磁记录部件。第二子轨道包括第二和第四分量的第二磁记录组件。第一记录符号由第一和第三分量形成。第二记录符号由第二和第四分量形成。

9. 发明申请

US20160071531A1 MAGNETIC HEAD AND MAGNETIC RECORDING AND REPRODUCING APPARATUS 审中-公开
公开(公告)号：US20160071531A1
公开(公告)日：2016-03-10
申请号：US14927549
申请日：2015-10-30
申请人： Kabushiki Kaisha Toshiba
发明人： Yousuke Isowaki , Kenichiro Yamada , Masayuki Takagishi
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3932 , G11B5/3954 , G11B5/398
摘要： A magnetic head of an embodiment includes a stack, side shields, and a first and a second magnetic shield. The stack includes a pin layer having a fixed magnetization direction, a first free layer having a magnetization direction to change in accordance with an external magnetic field, a second free layer antiferromagnetically exchange-coupled with the first free layer and having a magnetization direction to change in accordance with the field, and an antiferromagnetic layer exchange-coupled with the second free layer. A magnetic field is applied from the side shields to the first and second free layers, and a direction of the magnetic field is substantially parallel to the magnetization direction of one of the first and second free layers and substantially antiparallel to the magnetization direction of the other, and a magnetic volume of the one is larger than a magnetic volume of the other.

10. 发明授权

US09147411B2 Magnetic recording and reproducing device 有权
标题翻译：磁记录和再现装置
公开(公告)号：US09147411B2
公开(公告)日：2015-09-29
申请号：US14627003
申请日：2015-02-20
申请人： KABUSHIKI KAISHA TOSHIBA
发明人： Masayuki Takagishi , Hitoshi Iwasaki , Kenichiro Yamada , Yousuke Isowaki , Kohsuke Harada
IPC分类号： G11B5/39 , G11B5/11
CPC分类号： G11B5/3912 , G11B5/11 , G11B5/3909 , G11B2005/3996
摘要： According to one embodiment, a magnetic recording and reproducing device includes magnetic recording medium and a magnetic head. The magnetic recording medium includes a first surface. A plurality of bits is provided in the first surface. Each of the bits has a direction of magnetization corresponding to recorded information. The magnetic head includes a reproducing unit. The reproducing unit senses the direction of magnetization. The reproducing unit includes a first shield, a second shield, a first magnetic layer, a second magnetic layer, a third magnetic layer, a fourth magnetic layer, an intermediate layer, a first nonmagnetic layer, and a second nonmagnetic layer. The first and the second nonmagnetic layers include at least one selected from ruthenium, copper, and tantalum. A distance between the first shield and the second shield is not less than 3 times and not more than 7 times a length of each of the bits.
摘要翻译：根据一个实施例，磁记录和再现装置包括磁记录介质和磁头。磁记录介质包括第一表面。在第一表面中提供多个位。每个位具有对应于记录信息的磁化方向。磁头包括再现单元。再现单元感测磁化方向。再现单元包括第一屏蔽，第二屏蔽，第一磁性层，第二磁性层，第三磁性层，第四磁性层，中间层，第一非磁性层和第二非磁性层。第一和第二非磁性层包括选自钌，铜和钽中的至少一种。第一屏蔽和第二屏蔽之间的距离不小于每个位的长度的3倍且不超过7倍。

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