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1.发明授权
公开(公告)号：US5314596A
公开(公告)日：1994-05-24
申请号：US888105
申请日：1992-05-26
CPC分类号： G11B5/3153 , G11B5/3113 , G11B5/3163
摘要： A thin film magnetic recording head for high-density recording applications. The head includes a pole formed from at least two ferromagnetic material layers with one layer having high anisotropy (H.sub.k) and low permeability (.mu.), and the other layer having low H.sub.k and high .mu.. The high H.sub.k layer provides the lower magnetic impedance flux path in the tip region and the low H.sub.k layer provides the lower magnetic impedance path in the yoke region of the head. A non-magnetic film may be disposed between the layers, with a thickness chosen to minimize domain flux coupling of the two magnetic layers, while allowing magnetic signal flux transfer between layers at an appropriate point between the tip and the yoke. The pole may be sculpted so that the low H.sub.k layer extends only partially into the tip region, or so that the high H.sub.k layer extends only partially into the yoke. Alternatively, the invention may use a laminated, high permeability layer and a homogeneous layer in place of the high H.sub.k and low H.sub.k layers.
摘要翻译： 一种用于高密度记录应用的薄膜磁记录头。 头包括由至少两个铁磁材料层形成的极，一个具有高各向异性（Hk）和低磁导率（μ）的层，另一层具有低Hk和高mu。 高Hk层在尖端区域提供较低的磁阻抗通量，低Hk层在磁头的磁轭区域提供较低的磁阻抗路径。 可以在层之间设置非磁性膜，其厚度被选择为最小化两个磁性层的磁通量耦合，同时允许在尖端和轭之间的适当点处的层之间的磁信号通量传递。 极可以被雕刻，使得低Hk层仅部分地延伸到尖端区域，或者使得高Hk层仅部分地延伸到轭中。 或者，本发明可以使用层叠的高透过性层和均匀层代替高Hk和低Hk层。
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公开(公告)号：US5157570A
公开(公告)日：1992-10-20
申请号：US546280
申请日：1990-06-29
IPC分类号： G11B5/31
CPC分类号： G11B5/3153 , G11B5/3113 , G11B5/3163
摘要： A thin film magnetic recording head for high-density recording applications. The head includes a pole formed from at least two ferromagnetic material layers with one layer having high anisotropy (H.sub.k) and low permeability (.mu.), and the other layer having low H.sub.k and high .mu.. The high H.sub.k layer provides the lower magnetic impedance flux path in the tip region and the low H.sub.k layer provides the lower magnetic impedance path in the yoke region of the head. A non-magnetic film may be disposed between the layers, with a thickness chosen to minimize domain flux coupling of the two magnetic layers, while allowing magnetic signal flux transfer between layers at an appropriate point between the tip and the yoke. The pole may be sculpted so that the low H.sub.k layer extends only partially into the tip region, or so that the high H.sub.k layer extends only partially into the yoke. Alternatively, the invention may use a laminated, high permeability layer and a homogeneous layer in place of the high H.sub.k and low H.sub.k layers.
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公开(公告)号：US5195005A
公开(公告)日：1993-03-16
申请号：US890372
申请日：1992-05-26
CPC分类号： G11B5/31 , G11B5/127 , G11B5/17 , G11B5/3113 , Y10T29/49043
摘要： A thin film magnetic transducer includes a yoke having a plurality of arms and a plurality of coils, at least one of which is intertwined with the yoke to provide multiple flux interactions therebetween. Each arm includes a plurality of elongated segments that are oriented obliquely to each other and have easy axes of magnetization respectively transverse to the directions of flux conduction through the segments, and the segments (and arms) are joined together to cause flux to pass between them without flowing parallel to the easy axes.
摘要翻译： 薄膜磁换能器包括具有多个臂和多个线圈的轭，其中至少一个与轭相互缠绕以在其间提供多个通量相互作用。 每个臂包括多个彼此倾斜定向的细长段，并且具有容易的磁化轴，分别横贯通过段的通量传导方向，并且段（和臂）连接在一起以使通量在它们之间通过 而不流动平行于易轴。
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公开(公告)号：US5571573A
公开(公告)日：1996-11-05
申请号：US831615
申请日：1992-02-06
CPC分类号： C25D3/562 , G11B5/3109 , G11B5/3113 , H01F41/26 , G11B5/3163
摘要： A process resulting in enhanced pole performance, relative to permalloy poles, in narrow track magnetic devices. A preferred process includes increasing the anisotropy field of the pole material while maintaining an acceptable coercivity level and near zero magnetostriction. One embodiment utilizes a NiCoFe alloy containing 22% cobalt by weight, heat treated in an easy axis magnetic field in a non-oxidizing atmosphere. This process achieves favorable domain structures at narrow pole tip widths.
摘要翻译： 相对于坡莫合金极，在窄轨磁性装置中产生增强的极性能的工艺。 优选的方法包括增加极材料的各向异性场，同时保持可接受的矫顽力水平和接近零的磁致伸缩。 一个实施例使用含有22重量％钴的NiCoFe合金，在非氧化气氛中在容易轴磁场中进行热处理。 该过程在窄极尖宽度处获得有利的结构域结构。
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公开(公告)号：US5830587A
公开(公告)日：1998-11-03
申请号：US743270
申请日：1996-11-04
CPC分类号： G11B5/187 , C25D3/562 , G11B5/3109 , G11B5/3113 , G11B5/3163 , Y10S428/90 , Y10T428/1186 , Y10T428/12021 , Y10T428/12382 , Y10T428/12958
摘要： A process resulting in enhanced pole performance, relative to permalloy poles, in narrow track magnetic devices. A preferred process includes increasing the anisotropy field of the pole material while maintaining an acceptable coercivity level and near zero magnetostriction. One embodiment utilizes a NiCoFe alloy containing 22% cobalt by weight, heat treated in an easy axis magnetic field in a non-oxidizing atmosphere. This process achieves favorable domain structures at narrow pole tip widths.
摘要翻译： 相对于坡莫合金极，在窄轨磁性装置中产生增强的极性能的工艺。 优选的方法包括增加极材料的各向异性场，同时保持可接受的矫顽力水平和接近零的磁致伸缩。 一个实施例使用含有22重量％钴的NiCoFe合金，在非氧化气氛中在容易轴磁场中进行热处理。 该过程在窄极尖宽度处获得有利的结构域结构。
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公开(公告)号：US5089334A
公开(公告)日：1992-02-18
申请号：US227808
申请日：1988-08-03
IPC分类号： G01R33/02 , G11B5/31 , G11B5/33 , G11C11/14 , H01F3/04 , H01F10/30 , H01F10/32 , H01F41/30 , H05K9/00
CPC分类号： B82Y25/00 , B82Y40/00 , G01R33/02 , G11B5/3113 , G11B5/3153 , G11B5/332 , G11C11/14 , H01F10/30 , H01F10/32 , H01F41/302 , Y10S428/90 , Y10S428/928 , Y10T428/1186 , Y10T428/12465 , Y10T428/12597 , Y10T428/265
摘要： A method of flux conduction comprising providing a structure with anisotropy not purely in the transverse in-plane direction such that flux spreading into the transverse in-plane direction can occur by rotation.This method of flux conduction is used in magnetic devices having coupled magnetic layers or coupled magnetic domains. Devices disclosed which utilize this method can function as a magnetic recording head, bubble memory, magnetic field structure, magnetic field sensor, transformer, laminated magnetic memory element or magnetic shield.
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