公开(公告)号：US06466403B1

公开(公告)日：2002-10-15

申请号：US09532750

申请日：2000-03-22

申请人： Kiyoshi Sato ,  Toshihiro Kuriyama ,  Toshinori Watanabe

发明人： Kiyoshi Sato ,  Toshihiro Kuriyama ,  Toshinori Watanabe

IPC分类号： G11B5147

CPC分类号： G11B5/3967 ,  G11B5/3116 ,  G11B5/313

摘要： The present invention provides a thin film magnetic head having a recording track width of 1 &mgr;m or less, and a method for manufacturing the thin film magnetic head having a recording track width of 1 &mgr;m or less. In the thin film magnetic head, an upper core layer and a lower core layer extend from a back region toward a magnetic pole tip region, and are exposed at a medium opposing surface, and a gap layer is provided, in the magnetic pole tip region, between the upper core layer and the lower core layer. An insulation layer is deposited on the lower core layer, and a groove that extends from the medium opposing surface toward the back region is provided in the magnetic pole tip region of the insulation layer. A lower magnetic pole layer, the gap layer, and an upper magnetic pole layer are deposited in the groove. The lower magnetic pole layer is joined to the lower core layer, while the upper magnetic pole layer is joined to the upper core layer.

摘要翻译： 本发明提供一种具有1um或更小的记录磁道宽度的薄膜磁头，以及一种具有1μm或更小的记录磁道宽度的薄膜磁头的制造方法。 在薄膜磁头中，上芯层和下芯层从背部区域朝向磁极尖端区域延伸，并且在介质相对表面处露出，并且在磁极尖端区域中设置间隙层 ，在上芯层和下芯层之间。 绝缘层沉积在下芯层上，并且在绝缘层的磁极尖端区域中设置从介质相对表面朝向后部区域延伸的槽。 凹槽中沉积下磁极层，间隙层和上磁极层。 下磁极层接合到下芯层，而上磁极层与上芯层接合。

公开(公告)号：USRE37819E1

公开(公告)日：2002-08-13

申请号：US09482696

申请日：2000-01-18

申请人： Masamichi Saito ,  Toshinori Watanabe ,  Toshihiro Kuriyama

发明人： Masamichi Saito ,  Toshinori Watanabe ,  Toshihiro Kuriyama

IPC分类号： G11B539

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3906 ,  G11B5/3932 ,  G11B2005/3996 ,  Y10T29/49044

摘要： The present invention provides a magnetoresistive head wherein: a magnetoresistive film is created in a read-track region at the center of the magnetoresistive head; an antiferromagnetic film and a ferromagnetic film experiencing an exchange coupling magnetic field due to direct contact with the antiferromagnetic film are created on each end of the magnetoresistive film outside the read-track region in such a way that the ferromagnetic film is located beside the magnetoresistive film; a nonmagnetic intermediate film is created between the magnetoresistive film and the ferromagnetic film for preventing ferromagnetic coupling from being developed on a contact boundary surface between the magnetoresistive film and the ferromagnetic film and for making crystal orientations of the antiferromagnetic film and the ferromagnetic film uniform; and bias magnetization is applied to the magnetoresistive film by exchange coupling between the antiferromagnetic film and the ferromagnetic film.

摘要翻译： 本发明提供了一种磁阻头，其中：在磁阻头的中心处的读磁道区域中产生磁阻膜; 在磁轨膜区域的外侧的磁阻膜的两端形成反铁磁膜和由于与反铁磁性膜直接接触而产生交换耦合磁场的铁磁性膜，使铁磁膜位于磁阻膜旁边 ; 在磁阻膜和铁磁膜之间形成非磁性中间膜，用于防止铁磁耦合在磁阻膜和铁磁膜之间的接触边界面上显影，并使反铁磁膜和铁磁膜的晶体取向均匀; 并且通过反铁磁膜和铁磁性膜之间的交换耦合将偏磁化施加到磁阻膜。

公开(公告)号：US06352621B1

公开(公告)日：2002-03-05

申请号：US09640971

申请日：2000-08-17

申请人： Masamichi Saito ,  Toshinori Watanabe

发明人： Masamichi Saito ,  Toshinori Watanabe

IPC分类号： C23C1435

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G01R33/093 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3948 ,  G11B2005/3996 ,  G11C11/16 ,  H01F10/3263 ,  H01F10/3268 ,  H01L43/08 ,  H01L43/12

摘要： PtMn films are used as antiferromagnetic layers of a dual spin-valve type magnetoresistive sensor. An exchange anisotropic magnetic field is achieved regardless of whether the PtMn film is formed over or under the pinned magnetic layer. Also, an effective exchange anisotropic magnetic field is produced even with heat treatment at a relatively low temperature. Alternatively, a PtMn film is used as an antiferromagnetic layer of a spin-valve film laminate. The use of a PtMn film enables a sufficient exchange anisotropic magnetic field to be produced even with a relatively low heat treatment temperature and a relatively small film thickness. Therefore, the number of total layers of the spin-valve film laminate can be increased to increase a magnetoresistance ratio, and a total thickness of the spin-valve film laminate can be made relatively small.

摘要翻译： PtMn膜用作双自旋阀型磁阻传感器的反铁磁层。 无论PtMn膜是否形成在被钉扎的磁性层之上或之下，都实现了交换各向异性磁场。 此外，即使在相对低的温度下进行热处理，也产生有效的交换各向异性磁场。 或者，使用PtMn膜作为自旋阀膜层叠体的反铁磁层。 使用PtMn膜即使在相对低的热处理温度和相对较小的膜厚度下也能够产生充分的交换各向异性磁场。 因此，可以增加自旋阀膜层压体的总层数以增加磁阻比，并且可以使自旋阀膜层叠体的总厚度相对较小。

公开(公告)号：US06274256B1

公开(公告)日：2001-08-14

申请号：US09241349

申请日：1999-02-01

申请人： Toshinori Watanabe ,  Atsushi Sato ,  Akira Takahashi

发明人： Toshinori Watanabe ,  Atsushi Sato ,  Akira Takahashi

IPC分类号： G11B566

CPC分类号： G11B5/3967 ,  G11B5/3109 ,  G11B5/3116 ,  Y10S428/90 ,  Y10T428/1171

摘要： A product (S×Bs) of a cross-sectional area of a tip portion of an upper core layer (S) (a thickness of a layer d1 by a track width Tw) and a saturation magnetic flux density thereof (Bs) is in a range of 1.5 to 10.5 &mgr;m2·T, and preferably in a range of 4.0 to 8.0 &mgr;m2·T. Further, a magnetic pole straight length L1 ranges from 3.5 to 7.6 &mgr;M. Thus, excellent NLTS and OW characteristics can be simultaneously obtained.

摘要翻译： 上芯层（S）的尖端部分（层d1的厚度，轨道宽度Tw）和其饱和磁通密度（Bs）的截面积的乘积（SxBs）在一个范围内 为1.5〜10.5mum2.T，优选为4.0〜8.0m2。 此外，磁极直线长度L1在3.5至7.6μm的范围内。 因此，可以同时获得优异的NLTS和OW特性。

公开(公告)号：US4890227A

公开(公告)日：1989-12-26

申请号：US89919

申请日：1987-08-25

申请人： Toshinori Watanabe ,  Koichi Haruna ,  Hiroshi Motoyama ,  Toru Nishigaki ,  Koji Sasaki ,  Teruo Yakata ,  Yoshitaka Watanabe

发明人： Toshinori Watanabe ,  Koichi Haruna ,  Hiroshi Motoyama ,  Toru Nishigaki ,  Koji Sasaki ,  Teruo Yakata ,  Yoshitaka Watanabe

IPC分类号： G06F12/00 ,  G06F9/44 ,  G06F9/46 ,  G06F9/50 ,  G06F11/34 ,  G06F15/18 ,  G06N5/04

CPC分类号： G06F9/50 ,  G06F11/34 ,  G06F11/3433 ,  G06N99/005 ,  Y10S706/908

摘要： An autonomous resource management method for improving performance of a system in which plurality of process units compete for resources. Previously determined allocation policies are stored in memory along with system status data, control data and an evalution of the effectiveness of the allocation policy. During the operation of the system, the status is detected and an allocation policy is retrieved from memory based on the detected status. The allocation policy is then modified and sent to the scheduler. The effect of modifying the allocation policy is detected and an evaluation of the modified allocation policy is stored in memory. Inferior allocation policies are deleted from memory.

摘要翻译： 一种用于改善多个处理单元竞争资源的系统的性能的自主资源管理方法。 以前确定的分配策略与系统状态数据，控制数据以及分配策略的有效性的评估一起存储在存储器中。 在系统操作期间，检测到状态，并根据检测到的状态从存储器中检索分配策略。 然后将分配策略修改并发送到调度程序。 检测到修改分配策略的效果，并将修改的分配策略的评估存储在存储器中。 内存中删除较低的分配策略。

公开(公告)号：US20080019042A1

公开(公告)日：2008-01-24

申请号：US11780600

申请日：2007-07-20

申请人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita ,  Toshinori Watanabe

发明人： Yusuke TOMA ,  Hiroshi Kameda ,  Kiyoshi Kobayashi ,  Toru Takahashi ,  Sumihito Morita ,  Toshinori Watanabe

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/3123 ,  G11B5/3136 ,  G11B5/3912 ,  G11B5/3967

摘要： A perpendicular magnetic recording head includes a first magnetic layer having a main magnetic pole exposed at a medium-facing surface that faces a recording medium; a second magnetic layer that faces the first magnetic layer with a nonmagnetic layer interposed therebetween; and a coil layer for applying a recording magnetic field to the first magnetic layer. The second magnetic layer includes a relatively thick edge portion, whereby the edge-write magnetic field is reduced and the external magnetic field resistance is increased.

摘要翻译： 垂直磁记录头包括：第一磁性层，其具有在面向记录介质的面向中间的表面处暴露的主磁极; 面向第一磁性层的第二磁性层，介于其间的非磁性层; 以及用于向第一磁性层施加记录磁场的线圈层。 第二磁性层包括相对较厚的边缘部分，由此边缘写入磁场减小并且外部磁场电阻增加。

公开(公告)号：US20070115594A1

公开(公告)日：2007-05-24

申请号：US11624332

申请日：2007-01-18

申请人： Toru Takahashi ,  Hisayuki Yazawa ,  Hideki Gochou ,  Kiyoshi Kobayashi ,  Minoru Yamada ,  Kiyoshi Sato ,  Toshinori Watanabe

发明人： Toru Takahashi ,  Hisayuki Yazawa ,  Hideki Gochou ,  Kiyoshi Kobayashi ,  Minoru Yamada ,  Kiyoshi Sato ,  Toshinori Watanabe

IPC分类号： G11B5/33

CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3163 ,  Y10T29/49039 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A main magnetic pole layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed on the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily-introduce a recording magnetic field to a fore end of the main magnetic pole layer.

摘要翻译： 在平坦化面平坦化的绝缘层上形成有主磁极层，独立于主磁极，在主磁极层上形成膜厚大的磁轭层。 主磁极层的前端表面形成为具有随着前端表面离开辅助磁极层而在轨道宽度方向上逐渐增加的宽度尺寸的形状。 可以提供一种垂直磁记录头，其可以抑制记录图案中的边缘的发生，并且可以以高图案精度形成主磁极层，并且可以令人满意地将记录磁场引入主磁体的前端 极层。

公开(公告)号：US20070064343A1

公开(公告)日：2007-03-22

申请号：US11518723

申请日：2006-09-11

申请人： Hisayuki Yazawa ,  Toshinori Watanabe

发明人： Hisayuki Yazawa ,  Toshinori Watanabe

IPC分类号： G11B5/127

CPC分类号： G11B5/1278 ,  G11B5/1871 ,  G11B5/3116

摘要： A magnetic recording head and a method of manufacturing the magnetic recording head are provided. The perpendicular magnetic recording head includes a main magnetic pole layer and a return path layer that face each other with a gap therebetween in a lamination direction. A non-magnetic insulating layer is interposed between the main magnetic pole layer and the return path layer. At least one stepped portion is formed on a facing surface of at least one of the main magnetic pole layer and the return path layer.

摘要翻译： 提供磁记录头和制造磁记录头的方法。 垂直磁记录头包括在层叠方向上彼此面对间隙的主磁极层和返回路径层。 在主磁极层和返回路径层之间插入有非磁性绝缘层。 至少一个阶梯部分形成在主磁极层和返回路径层中的至少一个的面对表面上。

公开(公告)号：US20050128648A1

公开(公告)日：2005-06-16

申请号：US11045993

申请日：2005-01-27

申请人： Kiyoshi Sato ,  Toshinori Watanabe ,  Toshihiro Kuriyama

发明人： Kiyoshi Sato ,  Toshinori Watanabe ,  Toshihiro Kuriyama

IPC分类号： G11B5/31 ,  G11B5/39 ,  G11B5/127

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3133 ,  G11B5/3163 ,  G11B5/3967 ,  G11B2005/3996 ,  Y10T29/49021 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49048 ,  Y10T29/49052 ,  Y10T29/49073

摘要： A thin film magnetic head has coil layer formed in a space surrounded by a lower core layer, a protruding layer and a back gap layer. The top of these layers are planarized to a continuous flat surface. A lower magnetic pole layer, a gap layer, an upper magnetic pole layer and an upper core layer are formed on the flat surface and are precisely formed in a predetermined shape. The track width Tw can also be set to a predetermined dimension by the width of the upper magnetic pole layer at a surface facing the recording medium. Also, the magnetic path can be shortened to improve magnetic properties.

摘要翻译： 薄膜磁头具有形成在由下芯层，突出层和后间隙层包围的空间中的线圈层。 这些层的顶部被平坦化为连续的平坦表面。 在平坦表面上形成下磁极层，间隙层，上磁极层和上芯层，并精确地形成为预定形状。 轨道宽度Tw也可以通过面向记录介质的表面上的上磁极层的宽度设定为预定尺寸。 此外，可以缩短磁路以改善磁性。

公开(公告)号：US06898056B2

公开(公告)日：2005-05-24

申请号：US10288152

申请日：2002-11-05

申请人： Kiyoshi Sato ,  Toshinori Watanabe ,  Naruaki Oki

发明人： Kiyoshi Sato ,  Toshinori Watanabe ,  Naruaki Oki

IPC分类号： G11B5/31 ,  G11B5/66

CPC分类号： G11B5/3116 ,  G11B5/313 ,  Y10T428/1171

摘要： By forming a step in a lower core layer, the distance between the upper surface of a Gd-defining layer and the lower core layer is changed stepwise. Consequently, the distance between an upper magnetic pole layer formed on the upper surface of the Gd-defining layer and the lower core layer is small in the front region of the lower core layer, and thus a leakage magnetic field from the upper magnetic pole layer is absorbed by the lower core layer and is not applied to a recording medium.

摘要翻译： 通过在下芯层中形成台阶，Gd界定层的上表面与下芯层之间的距离逐步变化。 因此，形成在Gd定义层的上表面上的上磁极层与下芯层之间的距离在下芯层的前部区域较小，因此来自上磁极层的漏磁场 被下芯层层吸收并且不被施加到记录介质上。