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11. 发明申请

US20050259343A1 Thermally assisted recording system 有权
标题翻译：热辅助记录系统
公开(公告)号：US20050259343A1
公开(公告)日：2005-11-24
申请号：US11134088
申请日：2005-05-19
申请人： Fumiko Akagi , Masukazu Igarashi , Hideki Saga
发明人： Fumiko Akagi , Masukazu Igarashi , Hideki Saga
IPC分类号： G11B5/64 , G11B5/00 , G11B5/02 , G11B5/65 , G11B5/66 , G11B5/706 , H01F10/13 , H01F10/16 , G11B5/82
CPC分类号： G11B5/66 , G11B5/02 , G11B5/656 , G11B11/10536 , G11B11/10584 , G11B11/10586 , G11B2005/001 , G11B2005/0021 , H01F10/137 , H01F10/16
摘要： A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer at room temperature (the temperature maintaining the magnetization) and reduced by heating during recording to let the recording magnetization transition slope become steep. Parameter A normalizing the slope around the coercivity of the MH-loop of the medium is 1.5≦A
摘要翻译：提供热辅助磁记录系统以实现优异的耐热性和低噪声。在一个实施例中，使用磁记录介质，其中磁性颗粒间交换耦合大以通过在室温下（构成记录层的磁性颗粒）（保持磁化的温度）并通过加热而减小而使磁化热稳定在记录期间使记录磁化转变斜率变得陡峭。参数A围绕介质MH环的矫顽力的斜率标准化在室温下为1.5 <= A <6.0，加热时变为约1.0。

12. 发明授权

US5906884A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：US5906884A
公开(公告)日：1999-05-25
申请号：US518391
申请日：1995-08-15
申请人： Yotsuo Yahisa , Yoshibumi Matsuda , Joe Inagaki , Enji Fujita , Takao Yonekawa , Mitsuhiro Shoda , Akira Kato , Yuzuru Hosoe , Masukazu Igarashi
发明人： Yotsuo Yahisa , Yoshibumi Matsuda , Joe Inagaki , Enji Fujita , Takao Yonekawa , Mitsuhiro Shoda , Akira Kato , Yuzuru Hosoe , Masukazu Igarashi
IPC分类号： G11B5/66 , G11B5/65 , G11B5/73 , G11B5/82 , G11B33/08
CPC分类号： G11B5/7315 , G11B5/7325 , G11B5/82 , G11B33/08 , Y10S428/90
摘要： A magnetic recording medium has a substrate made of a nonmetal nonmagnetic material whose coefficient of linear expansion lies within a range from 0.000013/deg to 0.0001/deg. A magnetic layer is formed on the substrate as a thin polycrystalline film or a thin amorphous film. The magnetic layer has Co as a main component, which exhibits a negative magnetostrictive constant so that its coercive force rises in the direction of compressive strain. The magnetic layer is subjected to an in-plane compressive strain from the substrate due to a difference between the coefficient of thermal expansion of the substrate and the magnetic layer so that high coercivity is obtained in the magnetic layer.
摘要翻译：磁记录介质具有由非金属非磁性材料制成的基板，其线性膨胀系数在0.000013 / deg至0.0001 / deg的范围内。作为薄多晶膜或薄的无定形膜，在基板上形成磁性层。磁性层具有Co作为主要成分，其表现出负的磁致伸缩常数，使其矫顽力沿压缩应变的方向上升。由于衬底的热膨胀系数与磁性层之间的差异，磁性层受到来自衬底的面内压缩应变，从而在磁性层中获得高的矫顽力。

13. 发明授权

US07813071B2 Thermally assisted recording system 有权
标题翻译：热辅助记录系统
公开(公告)号：US07813071B2
公开(公告)日：2010-10-12
申请号：US12287010
申请日：2008-10-02
申请人： Fumiko Akagi , Masukazu Igarashi , Hideki Saga
发明人： Fumiko Akagi , Masukazu Igarashi , Hideki Saga
IPC分类号： G11B5/02
CPC分类号： G11B5/66 , G11B5/02 , G11B5/656 , G11B11/10536 , G11B11/10584 , G11B11/10586 , G11B2005/001 , G11B2005/0021 , H01F10/137 , H01F10/16
摘要： A thermally assisted magnetic recording system is provided to achieve excellent thermal resistance and low noise. In one embodiment, a magnetic recording medium is used, in which the magnetic intergrain exchange coupling is large to let the magnetization be thermally stable by coupling the magnetic grains constituting the recording layer at room temperature (the temperature maintaining the magnetization) and reduced by heating during recording to let the recording magnetization transition slope become steep. Parameter A normalizing the slope around the coercivity of the MH-loop of the medium is 1.5≦A
摘要翻译：提供热辅助磁记录系统以实现优异的耐热性和低噪音。在一个实施例中，使用磁记录介质，其中磁性颗粒间交换耦合大以通过在室温下（构成记录层的磁性颗粒）（保持磁化的温度）并通过加热而减小而使磁化热稳定在记录期间使记录磁化转变斜率变得陡峭。参数使围绕介质MH环的矫顽力的斜率标准化为1.5＆nlE;室温下A <6.0，加热约为1.0。

14. 发明申请

US20070116989A1 Magnetic recording media, its fabrication technique, and hard disk drive 审中-公开
标题翻译：磁记录介质，其制造技术和硬盘驱动器
公开(公告)号：US20070116989A1
公开(公告)日：2007-05-24
申请号：US11602957
申请日：2006-11-22
申请人： Hiroshi Ikekame , Yuko Tsuchiya , Masukazu Igarashi
发明人： Hiroshi Ikekame , Yuko Tsuchiya , Masukazu Igarashi
IPC分类号： G11B5/66 , B05D5/12
CPC分类号： G11B5/855
摘要： Provided is a medium fabrication technique, a recording medium and a hard disk drive, which achieve high recording density. To this end, (a) a magnetic layer is deposited on a substrate, and (b) a nano particle layer is deposited on the magnetic layer. Then, (c) the magnetic layer is etched by use of the nano particle layer as a mask, and (d) the nano particle layer is removed to form artificial magnetic grains, and thus an artificial granular magnetic recording medium is obtained.
摘要翻译：提供了一种实现高记录密度的介质制造技术，记录介质和硬盘驱动器。为此，（a）磁性层沉积在基底上，（b）纳米颗粒层沉积在磁性层上。然后，（c）通过使用纳米粒子层作为掩模蚀刻磁性层，（d）除去纳米粒子层，形成人造磁性粒子，得到人造粒状磁记录介质。

15. 发明授权

US06456448B1 Magnetic recording system including magnetic recording medium having three-dimensional random orientation of axis of easy magnetization 失效
标题翻译：磁记录系统包括磁记录介质，其具有易磁化轴的三维随机取向
公开(公告)号：US06456448B1
公开(公告)日：2002-09-24
申请号：US09435036
申请日：1999-11-05
申请人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
发明人： Fumiko Akagi , Masukazu Igarashi , Kazuetsu Yoshida , Akira Ishikawa
IPC分类号： G11B502
CPC分类号： G11B5/012 , G11B5/64 , G11B5/82 , G11B2005/001
摘要： A magnetic recording system which can suppress an influence by a thermal fluctuation and is suitable for the high density magnetic recording in which excellent S/N ratio and resolution are obtained is provided. There is provided a magnetic recording system constructed by: a magnetic recording medium having a magnetic layer formed on a substrate through an underlayer; a driving unit for driving the medium in the recording direction; a magnetic head constructed by a recording unit and a reproducing unit; an apparatus for relatively moving the magnetic head to the magnetic recording medium; and a recording reproduction signal processing apparatus for performing a signal input to the magnetic head and an output signal reproduction from the magnetic head, wherein the reproducing unit of the magnetic head is constructed by a magneto-resistance effect type head and the system has a recording magnetization pattern in which a magnetization transition length of the magnetic recording medium is equal to 70 nm or less, the direction of an axis of easy magnetization of the magnetic particles in the magnetic layer of the magnetic recording medium is three-dimensionally oriented. Even after the elapse of 100 hours after the recording and at a linear recording density of 360 kfci, a reproduction output hardly decreases. A degree of deterioration of the S/N ratio of the output to the noises and the resolution are smaller than that of the conventional system.
摘要翻译：能够抑制热波动的影响的磁记录系统，适用于获得优异的S / N比和分辨率的高密度磁记录。提供一种磁记录系统，其通过以下方式构成：磁记录介质，其具有通过底层在基板上形成的磁性层; 用于在记录方向上驱动介质的驱动单元; 由记录单元和再现单元构成的磁头; 用于将磁头相对移动到磁记录介质的装置; 以及用于执行向磁头输入的信号和从磁头再现的输出信号的记录再现信号处理装置，其中磁头的再现单元由磁阻效应型磁头构成，并且系统具有记录磁记录介质的磁化转变长度等于或小于70nm的磁化模式，磁记录介质的磁性层中的磁性颗粒容易磁化的轴的方向是三维取向的。即使在记录100小时后，线性记录密度为360kfci，再现输出几乎不降低。输出与噪声的S / N比和分辨率的劣化程度小于常规系统的劣化程度。

16. 发明授权

US5815343A Magnetic recording medium, process for producing the same and magnetic recording system 失效
标题翻译：磁记录介质，制造过程及磁记录系统
公开(公告)号：US5815343A
公开(公告)日：1998-09-29
申请号：US967346
申请日：1997-10-27
申请人： Akira Ishikawa , Yoshihiro Shiroishi , Yuzuru Hosoe , Yotsuo Yahisa , Tomoo Yamamoto , Masukazu Igarashi , Akira Osaki , Yoshiki Kato , Jun Fumioka
发明人： Akira Ishikawa , Yoshihiro Shiroishi , Yuzuru Hosoe , Yotsuo Yahisa , Tomoo Yamamoto , Masukazu Igarashi , Akira Osaki , Yoshiki Kato , Jun Fumioka
IPC分类号： G11B5/012 , G11B5/39 , G11B5/62 , G11B5/64 , G11B5/66 , G11B5/73 , G11B5/84 , G11B5/78 , G11B5/82 , G11B17/00
CPC分类号： G11B5/012 , G11B5/39 , G11B5/64 , G11B5/656 , G11B5/66 , G11B5/7315 , G11B5/7325 , G11B5/8404
摘要： A magnetic recording medium includes a non-magnetic substrate, and a magnetic layer provided on the non-magnetic substrate. The value of the product Br.sub.1 .delta. of the residual flux density Br.sub.1 of the magnetic layer determined in a recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 180 G.mu.m; the value of the ratio of Br.sub.1 to the residual flux density Br.sub.2 determined in a direction parallel to the substrate plane and perpendicular to the recording direction, Br.sub.1 /Br.sub.2, is not less than 1.3 and not more than 3; the surface of the non-magnetic substrate has texture grooves therein extending predominantly in the recording direction; and the average roughness factor Ra of the surface of the magnetic layer determined in a direction perpendicular to the substrate plane and perpendicular to the recording direction is not less than 0.3 nm and not more than 1.9 nm. Alternatively, the value of the product Br.delta. of the residual flux density Br of the magnetic layer determined in the recording direction and the thickness .delta. of the magnetic layer is not less than 5 G.mu.m and not more than 80 G.mu.m; and the value of the anisotropic magnetic field H.sub.k of the magnetic recording medium is not less than 7 kOe and not more than 20 kOe.
摘要翻译：磁记录介质包括非磁性衬底和设置在非磁性衬底上的磁性层。在记录方向上确定的磁性层的剩余磁通密度Br1和磁性层的厚度δ的乘积Br1δ的值不小于5Gm且不大于180Gm; 在平行于基板平面并垂直于记录方向Br1 / Br2的方向上确定的Br1与剩余通量密度Br2的比值不小于1.3且不大于3; 非磁性基板的表面具有主要在记录方向上延伸的织构槽; 并且在垂直于基板平面并垂直于记录方向的方向上确定的磁性层的表面的平均粗糙度Ra不小于0.3nm且不大于1.9nm。或者，在记录方向上确定的磁性层的剩余磁通密度Br和磁性层的厚度δ的乘积Br delta的值不小于5Gm且不大于80Gm; 并且磁记录介质的各向异性磁场Hk的值不小于7kOe且不大于20kOe。

17. 发明授权

US5561300A Atomic switching devices and logical circuits 失效
标题翻译：原子开关器件和逻辑电路
公开(公告)号：US5561300A
公开(公告)日：1996-10-01
申请号：US994968
申请日：1992-12-22
申请人： Yasuo Wada , Seiichi Kondo , Tsuyoshi Uda , Masukazu Igarashi , Hiroshi Kajiyama , Hisashi Nagano , Akito Sakurai , Tsuneo Ichiguchi
发明人： Yasuo Wada , Seiichi Kondo , Tsuyoshi Uda , Masukazu Igarashi , Hiroshi Kajiyama , Hisashi Nagano , Akito Sakurai , Tsuneo Ichiguchi
IPC分类号： G01Q90/00 , G11B9/00 , G11C11/34 , G11C13/00 , G11C19/00 , H01L27/06 , H01L27/085 , H01L49/00 , H03F3/04 , H03K17/51 , H03K17/54 , H03K17/56 , H03K19/02 , H03K19/08 , H01J37/30 , H02B1/24
CPC分类号： B82Y15/00 , B82Y10/00 , G11B9/14 , G11B9/1463 , G11C11/34 , G11C13/00 , G11C19/00 , H01L27/06 , H01L27/085 , H01L49/00 , H01L49/006 , H03F3/04 , H03K17/51 , H03K17/545 , H03K17/56 , H03K19/02 , H03K19/08 , G11C13/025 , G11C2213/81 , G11C2216/08 , Y10S977/94 , Y10T307/74 , Y10T307/937
摘要： In an atomic switch, opposite ends of an atom wire are connected to an input and output, and a switching gate is connected to a switching power supply. An input signal is outputted when a switching atom is connected to the atom wire, whereas an input signal is not outputted when the switching atom is moved to disconnect from the atom wire. There are provided an atom wire having a plurality of atoms arranged in a line or in a plurality of lines, in a ring shape, or in a curved line, and a switching gate made of an atom wire. The atom wire is switched by the field effect of the switching gate.
摘要翻译：在原子开关中，原子线的相对端连接到输入和输出，并且开关栅极连接到开关电源。当切换原子连接到原子线时输出输入信号，而当切换原子移动以与原子线分离时，输出信号不输出。提供一种原子线，其具有以线状或多条排列成环状或曲线的多个原子以及由原子线构成的开关栅极。原子线由开关栅极的场效应切换。

18. 发明授权

US08810946B2 Energy-assisted magnetic recording head and magnetic recording device 有权
标题翻译：能量磁记录头和磁记录装置
公开(公告)号：US08810946B2
公开(公告)日：2014-08-19
申请号：US13641239
申请日：2011-03-28
申请人： Kan Yasui , Harukazu Miyamoto , Masukazu Igarashi
发明人： Kan Yasui , Harukazu Miyamoto , Masukazu Igarashi
IPC分类号： G11B5/127
CPC分类号： G11B5/3146 , G11B5/1278 , G11B5/3116 , G11B5/314 , G11B5/315 , G11B2005/0024
摘要： A microwave-assisted magnetic recording system configured to perform magnetic recording with high density, including a high-frequency magnetic field generation element whose width is narrower than a track width of a main pole. A magnetic field vector from the main pole is perpendicularly incident on a film surface of the high-frequency magnetic field generating unit, by a shield material arranged to have a high magnetic permeability so that the main pole magnetic field is corrected and induced, and a hard bias layer to which a desired static magnetic field is added. Areas having high magnetic field gradients overlap each other by performing an offset of the high-frequency magnetic field generating unit of the magnetic head from the central line of the main pole.
摘要翻译：一种被配置为执行高密度磁记录的微波辅助磁记录系统，包括宽度窄于主极的轨道宽度的高频磁场产生元件。来自主极的磁场矢量垂直入射在高频磁场产生单元的膜表面上，通过屏蔽材料被布置成具有高导磁率，使得主极磁场被校正和感应，并且添加了期望的静磁场的硬偏压层。通过从主极的中心线执行磁头的高频磁场产生单元的偏移，具有高磁场梯度的区域彼此重叠。

19. 发明申请

US20110216436A1 INFORMATION RECORDING DEVICE 有权
标题翻译：信息记录装置
公开(公告)号：US20110216436A1
公开(公告)日：2011-09-08
申请号：US13128010
申请日：2009-11-10
申请人： Masukazu Igarashi , Harukazu Miyamoto
发明人： Masukazu Igarashi , Harukazu Miyamoto
IPC分类号： G11B15/12 , G11B5/127
CPC分类号： H01L43/08 , G11B5/314 , G11B2005/001 , G11B2005/0024 , H01L27/22
摘要： Excellent magnetization switching of a magnetic recording medium is promoted in microwave assisted magnetic recording to provide a highly-reliable high-density information recording device. A receded section from an air bearing surface is arranged at an end section in a write track width direction on an FGL laminate film for generating a high-frequency field. Alternatively, a cross section of the FGL laminate film (plane perpendicular to the direction of the flow of the electric current) has an inverted trapezoid shape or has a structure in which the area of the cross section increases with distance from the main pole. Since an excellent recording pattern is formed on the recording medium, areal recording density in the information recording device can be increased, and the reliability can be improved at the same time. As a result, the cost can be reduced.
摘要翻译：在微波辅助磁记录中促进了磁记录介质的优异磁化切换，以提供高度可靠的高密度信息记录装置。在用于产生高频场的FGL层压膜上，在空气轴承表面的后端部沿写入磁道宽度方向布置。或者，FGL层叠膜的横截面（与电流的流动方向垂直的面）具有倒梯形形状，或者具有横截面积随着与主极的距离而增大的结构。由于在记录介质上形成优良的记录图形，所以可以增加信息记录装置中的面密度，同时可以提高可靠性。因此，可以降低成本。

20. 发明授权

US06728051B2 Recording equalizer and magnetic recording/reproducing apparatus using the equalizer 有权
标题翻译：使用均衡器的记录均衡器和磁记录/再现装置
公开(公告)号：US06728051B2
公开(公告)日：2004-04-27
申请号：US10388466
申请日：2003-03-17
申请人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
发明人： Masukazu Igarashi , Yohji Maruyama , Kazuetsu Yoshida , Ikuo Saitoh
IPC分类号： G11B509
CPC分类号： G11B20/10055 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10194 , G11B20/14 , G11B2005/001 , G11B2005/0016 , G11B2020/10981
摘要： A recording equalizer for correcting a write timing of magnetic information when the magnetic information is recorded with a magnetic recording head on a magnetic recording medium, includes a buffer for storing a recording object bit and bits before and after the recording object bit and a calculator for calculating a precompensation parameter using the bits stored in the buffer. The calculator calculates the preconpensation parameter of the recording object bit by linearly adding influence of a transition existing at a two-previous bit of the recording object bit, influences of a transition at a one-previous bit of the recording object bit and influences of a transition existing at one-following bit of the recording object bit and further adding an offset. The offset is determined to a value such that a write timing of the magnetic information is corrected always in a delaying direction.
摘要翻译：当在磁记录介质上用磁记录头记录磁信息时，用于校正磁信息的写定时的记录均衡器包括：用于存储记录对象位的缓冲器和记录对象位之前和之后的位;以及计算器，使用存储在缓冲器中的位来计算预补偿参数。计算器通过线性地添加存在于记录对象位的前两位的转变的影响，记录对象位的前一位的转变的影响和影响的影响来计算记录对象位的前置补偿参数存在于记录对象位的一个后续位的转换，并进一步添加偏移。偏移被确定为使得磁信息的写入定时总是以延迟方向校正的值。

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