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公开(公告)号：US5436780A
公开(公告)日：1995-07-25
申请号：US897448
申请日：1992-06-10
申请人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tozaki , Satoru Mitani , Terumi Yanagi
发明人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tozaki , Satoru Mitani , Terumi Yanagi
CPC分类号： G11B15/125 , G11B5/3103 , G11B5/4893
摘要： A thin film magnetic head device to be equipped on a magnetic recording and reproducing system can meet a plurality of recording formats and carry out stabilized recording/reproducing without depending on the running direction of the magnetic tape. There are combined either of at least two thin film magnetic heads for recording each having on a substrate a recording transducer for recording information on a magnetic tape or two thin film magnetic heads for reproducing each having a reproducing transducer for reading out information recorded on a magnetic tape or two thin magnetic heads for recording and reproducing .in which the recording transducer and the reproducing transducer exist together. According to the running direction of the magnetic tape, only the thin film magnetic head Which is situated at the downstream side in the running direction of the magnetic tape is activated to be always in an operating condition.
摘要翻译： 配备在磁记录再现系统上的薄膜磁头装置可以满足多种记录格式，并且不依赖于磁带的运行方向进行稳定的记录/再现。 至少两个薄膜磁头中的至少两个用于记录的薄膜磁头中的每一个都具有用于在磁带上记录信息的记录换能器或用于再现每个具有用于读出记录在磁性上的信息的再现换能器的两个薄膜磁头的记录换能器 磁带或两个用于记录和再现的薄磁头，其中记录换能器和再现换能器存在一起。 根据磁带的运行方向，只有位于磁带运行方向下游侧的薄膜磁头被激活才能始终处于工作状态。
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公开(公告)号：US5535079A
公开(公告)日：1996-07-09
申请号：US332048
申请日：1994-11-01
申请人： Toshio Fukazawa , Yoshihiro Tosaki , Kumiko Wada , Satoru Mitani , Terumi Yanagi
发明人： Toshio Fukazawa , Yoshihiro Tosaki , Kumiko Wada , Satoru Mitani , Terumi Yanagi
CPC分类号： G11B5/3925 , G11B5/3967
摘要： In an integrated thin film magnetic head, a write pole or inductive head I.sub.h includes first and second magnetic cores magnetically coupled to form a magnetic circuit and a coil formed between the first and second magnetic cores. An MR element read pole or MR head MR.sub.h includes first and second yokes, an MR element and a bias conductor for applying a biasing magnetic field on the MR device, and the first magnetic core or the second magnetic core constitutes the second yoke.
摘要翻译： 在集成薄膜磁头中，写极或感应头Ih包括磁耦合以形成磁路的第一和第二磁芯以及形成在第一和第二磁芯之间的线圈。 MR元件读取极或MR磁头MRh包括第一和第二磁轭，用于在MR装置上施加偏置磁场的MR元件和偏置导体，并且第一磁芯或第二磁芯构成第二磁轭。
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3.发明授权Thin film magnetoresistive head for magnetic recording and reproducing apparatus 失效用于磁记录和再现装置的薄膜磁阻头
公开(公告)号：US5469317A
公开(公告)日：1995-11-21
申请号：US255802
申请日：1994-06-07
申请人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
发明人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
CPC分类号： G11B5/3925 , G11B5/3961 , G11B5/295
摘要： In a magnetoresistive head capable of performing favorable magnetic recording and reproduction, an overlap width of a front yoke and a magnetoresistive element is always wider than an overlap width of a back yoke and the magnetoresistive element. Generally, the magnetoresistive head varies in its reproduction efficiency by the overlap width of the yoke and magnetoresistive element. In particular, the reproduction output is significantly affected by the overlap width of the front yoke and magnetoresistive element, and when the overlap width of the front yoke becomes narrower than the overlap width of the back yoke, the reproduction output tends to decrease abruptly. Therefore, by keeping the overlap width of the front yoke always wider than the other, a stable reproduction output can be achieved. In particular, an outstanding effect is obtained in a multi-channel magnetoresistive head containing multiple magnetoresistive elements in one head.
摘要翻译： 在能够进行有利的磁记录和再现的磁阻头中，前磁轭和磁阻元件的重叠宽度总是比后磁轭和磁阻元件的重叠宽度宽。 通常磁阻磁头通过磁轭和磁阻元件的重叠宽度在其再现效率上变化。 特别地，再现输出受到前磁轭和磁阻元件的重叠宽度的显着影响，并且当前磁轭的重叠宽度变得比背轭的重叠宽度窄时，再现输出趋于急剧下降。 因此，通过保持前轭的重叠宽度总是比另一方宽，可以实现稳定的再现输出。 特别地，在包含一个磁头中的多个磁阻元件的多通道磁阻磁头中获得了显着的效果。
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公开(公告)号：US5022141A
公开(公告)日：1991-06-11
申请号：US539738
申请日：1990-06-18
申请人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
发明人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
CPC分类号： H01F41/041 , G11B5/3163 , Y10T29/49062 , Y10T29/49064
摘要： A method of manufacturing a multiturn coil and a thin film magnetic head including a multiturn coil.This multiturn coil manufacturing method includes the following steps. First a laminate made up of conducting layers and insulating layers for coil is formed on a base member on a substrate and having a given inclination. Then this laminate is formed into a loop shape with a space or discontinuity thereon. In the next step, the upper part of the laminate on opposite sides of the space is removed to form a flat surface parallel to the substrate in which the ends of all the conducting layers are exposed. Finally, film conductive strips are connected between these exposed portions across the discontinuity to complete a multiturn coil.
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5.发明授权Magnetic head for multi-track recording having read and write transducers formed by thin-film technology 失效用于多轨记录的磁头，具有通过薄膜技术形成的读和写传感器
公开(公告)号：US5027245A
公开(公告)日：1991-06-25
申请号：US569221
申请日：1990-08-15
申请人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
发明人： Yuji Nagata , Toshio Fukazawa , Kumiko Wada , Yoshihiro Tosaki
CPC分类号： G11B5/3106 , G11B5/488 , G11B5/4893
摘要： A magnetic head for multi-track data recording on magnetic tape is formed of a combination of two head modules, each having a linear array of thin-film transducer elements formed on a substrate, each of these arrays consisting of a mixture of write elements and read elements. These are positioned on the respective head modules such that when the head modules are combined with the substrates mutually opposing, pairs of transducer elements are formed for respective tape tracks, each pair consisting of a read and a write element. "Read-after-write" recording confirmation can thereby be implemented together with bidirectional recording operation, by using only a combination of two head modules.
摘要翻译： 用于在磁带上进行多轨数据记录的磁头由两个头模块的组合形成，每个头模块具有形成在衬底上的薄膜换能器元件的线性阵列，这些阵列中的每一个由写入元件和 读元素 这些位于相应的头部模块上，使得当头部模块与彼此相对的基底组合时，形成用于相应磁带轨道的成对的换能器元件，每对由读取和写入元件组成。 因此，通过仅使用两个头模块的组合，可以与双向记录操作一起实现“写后读取”记录确认。
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公开(公告)号：US5335127A
公开(公告)日：1994-08-02
申请号：US902580
申请日：1992-06-22
申请人： Yuji Nagata , Toshio Fukazawa , Satoru Mitani
发明人： Yuji Nagata , Toshio Fukazawa , Satoru Mitani
CPC分类号： G11B5/3925 , G11B5/3951 , G11B5/3977 , G11B5/4893
摘要： A lamination type magneto-resistive head used for a magnetic reproducing apparatus is formed by laminating two magneto-resistive heads, at least with the position of two magneto-resistive elements substantially shifted from each other for lamination and also enabling a plurality of track formats to be conformed, thus making it possible to assure stable outputs at a low frequency range.
摘要翻译： 用于磁再现装置的层叠型磁阻头通过层叠两个磁阻头而形成，至少两个磁阻元件的位置彼此基本上相互偏移以进行层压，并且还使得多个磁道格式能够 因此可以在低频范围内确保稳定的输出。
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7.发明授权
公开(公告)号：US5095397A
公开(公告)日：1992-03-10
申请号：US559065
申请日：1990-07-30
申请人： Yuji Nagata , Toshio Fukazawa , Satoru Mitani
发明人： Yuji Nagata , Toshio Fukazawa , Satoru Mitani
CPC分类号： G11B5/3903 , G11B5/245
摘要： There is disclosed a thin film magnetic head which requires less recording current, and is capable of recording and reproducing with a high sensitivity. To achieve this magnetic head, a third yoke of a high permeability is bridged across a notched portion of a second yoke between front and back portions of the second yoke constituting part of a magnetic circuit. With this construction, the third yoke serves to extremely reduce a magnetic resistance between the front and back portions of the second yoke, so that the recording current can be smaller, thereby enhancing the recording efficiency.
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公开(公告)号：US5025342A
公开(公告)日：1991-06-18
申请号：US567812
申请日：1990-08-15
申请人： Yuji Nagata , Toshio Fukazawa
发明人： Yuji Nagata , Toshio Fukazawa
CPC分类号： G11B5/3903 , G11B5/2452 , G11B5/3116 , G11B5/3967
摘要： A magnetic head device of thin-film type having superior recording and reproducing characterisics. The magnetic head device has a non-magnetic substrate and lower and upper magnetic layers formed on the substrate. At least one of the magnetic layers has a double-layered structure composed of two soft magnetic layers. One of these soft magnetic layers, which is disposed at the inner side of the magnetic circuit, has a coercive force smaller than that of the other soft magnetic layer. The soft magnetic layer having the greater coercive force, at least at a portion thereof contactable with the recording medium, has a greater width than the soft magnetic layer of the smaller coercive force as viewed in the direction of the track.
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9.发明授权
公开(公告)号：US5097372A
公开(公告)日：1992-03-17
申请号：US559067
申请日：1990-07-30
申请人： Toshio Fukazawa , Yuji Nagata
发明人： Toshio Fukazawa , Yuji Nagata
CPC分类号： G11B5/3925 , G11B5/2452 , G11B5/3116 , G11B5/3945 , G11B5/3967
摘要： A thin film magnetic head includes an upper magnetic layer comprising a first yoke, a portion of which is divided into front and rear sections and which is provided near the divided sections with a magneto-resistive element, a second yoke provided adjacent to the opposite ends of the first yoke in a widthwise direction of a recording track and a third yoke provided between the first yoke and the second yoke and having a larger magnetic reluctance than those of the first and second yokes. In the above constitution, the first, second and third yokes can be mainly used in recording to record in an area of a large width on the recording medium, and only the first yoke can be used in reproducing to reproduce in an area of a small width on the recording medium, so that the reproducing output is not reduced when the recording medium experiences a running deviation.
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公开(公告)号：US07137192B2
公开(公告)日：2006-11-21
申请号：US10640068
申请日：2003-08-13
申请人： Masaya Sakaguchi , Toshio Fukazawa
发明人： Masaya Sakaguchi , Toshio Fukazawa
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3106 , G11B5/3163 , G11B5/3903 , G11B5/3912 , G11B5/3932 , G11B5/40 , G11B2005/3996 , Y10T29/49032 , Y10T29/49043 , Y10T29/49044 , Y10T29/49067 , Y10T428/1143 , Y10T428/1164
摘要： A thin film head comprising a GMR element formed of an antiferromagnetic layer, a pinning layer, a nonmagnetic conductive layer and a free magnetic layer; and a pair of the right and the left laminated longitudinal biasing layers, each of the layers containing a hard magnetic layer, a nonmagnetic layer and a soft magnetic layer provided on said free magnetic layer of GMR element. Said hard magnetic layer and said soft magnetic layer are antiferromagnetically exchange-coupled via said nonmagnetic layer, and said hard magnetic layer and said free magnetic layer locating next to said hard magnetic layer are ferromagnetically coupled. The present invention contains also a method for manufacturing the thin film head.
摘要翻译： 一种薄膜头，包括由反铁磁层，钉扎层，非磁性导电层和自由磁性层形成的GMR元件; 以及一对左右的层叠纵向偏置层，每个层包含设置在所述GMR元件的自由磁性层上的硬磁性层，非磁性层和软磁性层。 所述硬磁性层和所述软磁性层经由所述非磁性层进行反铁磁交换耦合，并且位于所述硬磁性层旁边的所述硬磁性层和所述自由磁性层被铁磁耦合。 本发明还包括制造薄膜头的方法。
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