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1. 发明授权

US4845671A Bloch line memory device 失效
标题翻译：布洛克线内存设备
公开(公告)号：US4845671A
公开(公告)日：1989-07-04
申请号：US225318
申请日：1988-07-28
申请人： Youji Maruyama , Tadashi Ikeda , Teruaki Takeuchi , Ryo Suzuki
发明人： Youji Maruyama , Tadashi Ikeda , Teruaki Takeuchi , Ryo Suzuki
IPC分类号： G11C11/14 , G11C19/08
CPC分类号： G11C19/0858
摘要： A Bloch line memory device and a method of erasing information in which, for erasure of a Bloch line pair representative of one bit of information and located in one end portion of one stripe domain, the stripe domain is stretched by decreasing the intensity of a bias magnetic field, an erasure Bloch line pair having a rotation of magnetization opposite to that of the to-be-erased Bloch line pair is injected into the end portion of the stretched stripe domain by supplying a current pulse signal to a conductor arranged substantially perpendicualr to the lengthwise direction of the stripe domain, and the stretched stripe domain is shrinked by restoring the intensity of the bias magnetic field, so that the to-be-erased Bloch line pair is combined with the erasure Bloch line pair to cancel the former.
摘要翻译：一种布洛赫线存储器件和一种擦除信息的方法，其中为了擦除代表一比特信息并位于一个条带域的一个端部中的布洛赫线对，条带域通过降低偏置强度而被拉伸将具有与被擦除的布洛赫线对相反的磁化旋转的擦除布洛赫线对通过将电流脉冲信号提供给布置在基本上延伸的导体上而被注入延伸条带域的端部，通过恢复偏置磁场的强度，条状域的长度方向和拉伸的条状域被收缩，使得被擦除的Bloch线对与擦除布洛赫线对组合以取消前者。

2. 发明授权

US4831584A Bloch line memory device 失效
标题翻译：布洛克线内存设备
公开(公告)号：US4831584A
公开(公告)日：1989-05-16
申请号：US76215
申请日：1987-07-22
申请人： Youji Maruyama , Ryo Suzuki
发明人： Youji Maruyama , Ryo Suzuki
IPC分类号： G11C11/14 , G11C19/08
CPC分类号： G11C19/0858
摘要： A Bloch line memory device in which a stripe magnetic domain is formed within a magnetic film for holding magnetic bubble domains, and Bloch line pairs are stored as information carriers within a magnetic wall defining the magnetic domain. In order to write Bloch lines into the magnetic wall of the stripe magnetic domain, current is caused to flow through a single conductor which is so disposed as to cross the magnetic wall of the stripe magnetic domain. On this occasion, the current through the single conductor is so directed as to generate an in-plane field opposite in sense to magnetization within the magnetic wall of the stripe magnetic domain.

3. 发明授权

US5050122A Bloch line memory device and method for operating same 失效
标题翻译： Bloch线存储器件及其操作方法
公开(公告)号：US5050122A
公开(公告)日：1991-09-17
申请号：US16656
申请日：1987-02-19
申请人： Youji Maruyama , Ryo Suzuki
发明人： Youji Maruyama , Ryo Suzuki
IPC分类号： G11C11/14 , G11C19/08
CPC分类号： G11C19/0883 , G11C19/0858 , G11C19/0866
摘要： There are disclosed techniques concerning reading out Bloch lines in a Bloch line memory device, where pairs of Bloch lines are used as an information carrier. The pairs of Bloch lines are transferred to the head portion of a stripe magnetic domain and an inplane magnetic field is applied at the proximity of the head portion of the stripe magnetic domain so that the pairs of Bloch lines are split. In this way only one of the Bloch lines can exist stably at the head portion of the stripe magnetic domain. Then the Bloch lines are transformed into a magnetic bubble domain by making electric current to flow through a hair-pin shaped conductor disposed at the proximity of the head portion of the stripe magnetic domain. This magnetic bubble domain is detected by a magnetic bubble detector.
摘要翻译：公开了在Bloch线存储器件中读出Bloch线的技术，其中使用Bloch线对作为信息载体。将布洛赫线对转移到条形磁畴的头部，并且在条形磁畴的头部附近施加内平面磁场，使得布洛赫线对被分开。以这种方式，只有布洛赫线之一可以稳定地存在于条状磁畴的头部。然后，通过使电流流过布置在条形磁畴的头部附近的发针形导体，将Bloch线转换成磁性气泡区域。该磁性气泡区域由磁性气泡检测器检测。

4. 发明授权

US5047978A Bloch line memory device 失效
标题翻译：布洛克线内存设备
公开(公告)号：US5047978A
公开(公告)日：1991-09-10
申请号：US362646
申请日：1989-06-07
申请人： Youji Maruyama , Tadashi Ikeda , Ryo Suzuki
发明人： Youji Maruyama , Tadashi Ikeda , Ryo Suzuki
IPC分类号： G11C11/14 , G11C19/08
CPC分类号： G11C19/0866 , G11C19/0858
摘要： A Bloch line read/write memory in which a Bloch line or lines near the end portion of a stripe domain are moved in a predetermined direction to turn the direction of a wall magnetization at the end portion to a right turn direction as viewed form the surface of a film on which a bubble chopping conductor is disposed, and thereby reduce erroneous reading errors and increase the chopping current margin.
摘要翻译：布洛赫线读/写存储器，其中在条纹域的端部附近的布洛赫线或线沿预定方向移动，以将端部处的壁磁化方向转动到从表面观察的右转方向设置有气泡斩波导体的膜，从而减少错误读取误差并增加斩波电流裕度。

5. 发明授权

US4949304A Bloch line memory device 失效
标题翻译：布洛克线内存设备
公开(公告)号：US4949304A
公开(公告)日：1990-08-14
申请号：US241731
申请日：1988-09-08
申请人： Youji Maruyama , Tadashi Ikeda , Ryo Suzuki
发明人： Youji Maruyama , Tadashi Ikeda , Ryo Suzuki
IPC分类号： G11C11/14 , G11C19/08
CPC分类号： G11C19/0866
摘要： In a Bloch line memory device, information corresponds to the presence or absence of a Bloch line pair present in the magnetic wall of a stripe magnetic domain. Reading of information is effected by converting the presence and absence of a Bloch line pair into the presence and absence of a magnetic bubble domain. The conversion is effected such that, after the stripe magnetic domain has been shrunk in such a manner that no Bloch line is present therein, a magnetic field for chopping off the stripe magnetic domain is applied to the shrunken portion. Thus, when a Bloch line is present at an end portion of the stripe magnetic domain, the stripe magnetic domain is chopped off to form a magnetic bubble domain, whereas, when no Bloch line is present at the end portion of the stripe magnetic domain, the stripe magnetic domain is not chopped off and therefore no magnetic bubble domain is formed. Whether the magnetic bubble domain is present or absent is processed as information.
摘要翻译：在布洛克线存储器件中，信息对应于存在于条状磁畴的磁壁中的Bloch线对的存在或不存在。信息的读取通过将Bloch线对的存在和不存在转换为存在和不存在磁性气泡域来实现。进行转换，使得在条形磁畴已经以不存在布洛赫线的方式收缩之后，将用于切断条形磁畴的磁场施加到缩小部分。因此，当在条形磁畴的端部存在布洛赫线时，条状磁畴被切断以形成磁性气泡畴，而当在条状磁畴的端部没有布洛赫线时，条纹磁畴不会被切断，因此不会形成磁性气泡畴。是否存在或不存在磁泡区域作为信息被处理。

6. 发明申请

US20050036236A1 Thin film magnetic head and manufacturing method thereof 失效
标题翻译：薄膜磁头及其制造方法
公开(公告)号：US20050036236A1
公开(公告)日：2005-02-17
申请号：US10894723
申请日：2004-07-19
申请人： Gen Oikawa , Kazue Kudo , Youji Maruyama , Noriyuki Saiki , Hiromi Shiina
发明人： Gen Oikawa , Kazue Kudo , Youji Maruyama , Noriyuki Saiki , Hiromi Shiina
IPC分类号： G11B5/147 , G11B5/31
CPC分类号： G11B5/3116 , G11B5/147 , Y10T29/49032
摘要： Embodiments of the invention provide a lustrous and uniform plating film having high-performance magnetic characteristics and a thin film magnetic head usable in a high frequency recording band by using the plating film of the invention at a magnetic pole portion. Plating is performed in a plating bath at a low pH of about 1.5 to 2.3. The accuracy of pH control is improved. A magnetic film with the addition of a high resistive metal such as Cr or Mo is formed under the plating condition. Further, the magnetic characteristic is improved by applying a heat treatment to the plating film in a magnetic field, according to specific embodiments of the present invention. A plating film with brightness and uniformity having high saturation magnetic flux density can be formed by reducing the hysteresis loss and the eddy current loss as the magnetic characteristics by the above techniques.
摘要翻译：本发明的实施例通过使用本发明的镀膜在磁极部分提供具有高性能磁特性的光泽均匀的镀膜和可用于高频记录带的薄膜磁头。电镀在约1.5至2.3的低pH值的电镀浴中进行。 pH控制的准确性得到提高。在电镀条件下形成具有添加诸如Cr或Mo的高电阻金属的磁性膜。此外，根据本发明的具体实施方式，通过在磁场中对镀膜进行热处理来提高磁特性。通过上述技术，可以通过减小作为磁特性的磁滞损耗和涡流损耗来形成具有高饱和磁通密度的亮度和均匀性的电镀膜。

7. 发明授权

US08000058B2 Magnetic head for perpendicular recording having pole pieces provided on surface of soft magnetic film 有权
标题翻译：用于垂直记录的磁头，其具有设置在软磁膜表面上的极片
公开(公告)号：US08000058B2
公开(公告)日：2011-08-16
申请号：US11258468
申请日：2005-10-24
申请人： Tadayuki Iwakura , Youji Maruyama , Masafumi Mochizuki , Ichiro Ohdake
发明人： Tadayuki Iwakura , Youji Maruyama , Masafumi Mochizuki , Ichiro Ohdake
IPC分类号： G11B5/265 , G11B5/31 , G11B5/39
CPC分类号： G11B5/3136 , G11B5/1278 , G11B5/3106
摘要： Embodiments of the invention provide a perpendicular recording magnetic head capable of reducing leakage magnetic fields from the soft magnetic films on the air bearing surface side and reducing the protrusion of the soft magnetic films in the direction of the air bearing surface side due to thermal deformation of the soft magnetic films. In one embodiment, the write functional section includes a coil conductor, second soft magnetic film pattern and first soft magnetic film pattern that cover the coil conductor from top and bottom and are magnetically coupled to each other, and a main magnetic pole piece determining a track width. The read functional section includes a reading element sandwiched between two magnetic shield films. A pedestal magnetic pole pattern is formed at the frontal end position of the first soft magnetic film pattern.
摘要翻译：本发明的实施例提供一种垂直记录磁头，其能够减少来自空气轴承面侧的软磁性膜的泄漏磁场，并且由于热变形而减小软磁性膜在空气轴承面侧的方向上的突出软磁膜。在一个实施例中，写功能部分包括线圈导体，第二软磁膜图案和第一软磁膜图案，其从顶部和底部覆盖线圈导体并且彼此磁耦合;以及主磁极片，其确定轨道宽度。读取功能部分包括夹在两个磁屏蔽膜之间的读取元件。在第一软磁膜图案的前端位置处形成基座磁极图案。

8. 发明申请

US20070211382A1 Magnetic head and magnetic disk storage apparatus mounting the head 有权
标题翻译：安装磁头的磁头和磁盘存储装置
公开(公告)号：US20070211382A1
公开(公告)日：2007-09-13
申请号：US11707415
申请日：2007-02-15
申请人： Masafumi Mochizuki , Kimitoshi Etoh , Youji Maruyama , Hiroshi Fukui
发明人： Masafumi Mochizuki , Kimitoshi Etoh , Youji Maruyama , Hiroshi Fukui
IPC分类号： G11B5/147
CPC分类号： G11B5/3116 , G11B5/1278 , G11B5/1872 , G11B5/3146
摘要： Embodiments in accordance with the present invention provide a magnetic head in which broadening of the write-field distribution in the track-width direction can be decreased without reducing the write-field intensity. A main pole includes a pole tip having a part which provides the write track-width and a yoke part recessed from the air bearing surface in the element height direction, the pole tip including at least two magnetic films having different track-width directions, and the throat height at the trailing side being made smaller than the throat height at the leading side.
摘要翻译：根据本发明的实施例提供一种磁头，其中可以减小磁道宽度方向上的写入场分布的扩大，而不降低写入场强度。主极包括具有提供写入轨道宽度的部分的磁极尖端和在元件高度方向上从空气轴承表面凹陷的磁轭部分，磁极末端包括具有不同轨道宽度方向的至少两个磁性膜，以及在后侧的喉部高度小于前侧的喉部高度。

9. 发明申请

US20050208340A1 Magnetic thin film head 失效
标题翻译：磁性薄膜头
公开(公告)号：US20050208340A1
公开(公告)日：2005-09-22
申请号：US11084683
申请日：2005-03-18
申请人： Gen Oikawa , Kazue Kudo , Youji Maruyama , Hiromi Shiina
发明人： Gen Oikawa , Kazue Kudo , Youji Maruyama , Hiromi Shiina
IPC分类号： C25D5/10 , B05D5/12 , B32B1/00 , C22C19/00 , C22C38/00 , C25D5/16 , C25D5/18 , C25D5/50 , C25D7/00 , G11B5/21 , G11B5/31 , H01F10/16 , H01F10/30 , H01F41/26
CPC分类号： B32B15/01 , G11B5/21 , Y10T428/115 , Y10T428/1186
摘要： A magnetic film capable of generating strong magnetic fields even in a high frequency region, a manufacturing method therefore and a thin film magnetic head capable of recording even in a high frequency region are provided. In one embodiment, the magnetic film is manufactured by using a 88FeNi film of 200 nm thick having minimum Hk of 0.32 Oe (25.6 A/m) as a main magnetic film and selecting a 20 wt % FeNi film of a similar FeNi alloy plating film having low Hk and low Hc as an interlayer material. A stacked film comprising (88FeNi/20FeNi)×10 layers is prepared so that the total thickness of the main magnetic film is 2 μm. The 88FeNi film is prepared by application of a DC current in a 88FeNi plating bath, and the 20FeNi film is prepared by pulse plating successively in the same bath.
摘要翻译：提供了即使在高频区域也能够产生强磁场的磁性膜，因此制造方法和即使在高频区域也能够进行记录的薄膜磁头。在一个实施例中，通过使用具有最小Hk为0.32Oe（25.6A / m）的200nm厚度的88FeNi膜作为主要磁性膜并选择类似的FeNi合金镀膜的20wt％FeNi膜来制造磁性膜具有低Hk和低Hc作为中间层材料。制备包含（88FeNi / 20FeNi）×10层的层叠膜，使得主磁性膜的总厚度为2μm。通过在88FeNi电镀浴中施加DC电流制备88FeNi膜，并通过在相同的浴中连续脉冲电镀制备20FeNi膜。

10. 发明授权

US07679860B2 Thin film magnetic head with layer having high saturation magnetic flux density, and magnetic storage apparatus 有权
标题翻译：具有高饱和磁通密度的层的薄膜磁头和磁存储装置
公开(公告)号：US07679860B2
公开(公告)日：2010-03-16
申请号：US11372835
申请日：2006-03-09
申请人： Kazue Kudo , Gen Oikawa , Youji Maruyama , Hiromi Shiina
发明人： Kazue Kudo , Gen Oikawa , Youji Maruyama , Hiromi Shiina
IPC分类号： G11B5/147 , G11B5/31
CPC分类号： G11B5/1278 , G11B5/21 , G11B5/3109 , H01F10/16 , H01F41/26 , Y10T428/115 , Y10T428/1186
摘要： Embodiments of the invention provide a magnetic film capable of providing a higher saturation magnetic flux density as compared with the conventional one, a process of forming the magnetic film, a thin film magnetic head that makes use of the magnetic film, and a magnetic disk drive having this thin film magnetic head. In one embodiment, a magnetic film contains Co, Ni, and Fe, and its composition is such that 10≦Co
摘要翻译：本发明的实施例提供了一种能够提供比常规的更高的饱和磁通密度的磁性膜，形成磁性膜的方法，利用磁性膜的薄膜磁头和磁盘驱动器具有这种薄膜磁头。在一个实施方案中，磁性膜含有Co，Ni和Fe，并且其组成使得10

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