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1. 发明授权

US4860140A Magnetic head closure having ferrite substrate and closure and conductive thin film coil deposited in recess of substantially same shape in ferrite substrate 失效
标题翻译：具有铁氧体衬底的磁头封盖和在铁氧体衬底中沉积在基本相同形状的凹陷中的闭合和导电薄膜线圈
公开(公告)号：US4860140A
公开(公告)日：1989-08-22
申请号：US183338
申请日：1988-04-07
申请人： Kazuhiro Momata , Kousaku Chida , Tooru Takeura , Yukihisa Tsukada
发明人： Kazuhiro Momata , Kousaku Chida , Tooru Takeura , Yukihisa Tsukada
IPC分类号： G11B5/133 , G11B5/17 , G11B5/187 , G11B5/193
CPC分类号： G11B5/193 , G11B5/1335 , G11B5/17 , G11B5/1871
摘要： The magnetic head according to the present invention has a ferrite substrate and closure. The ferrite substrate has formed therein a first recess in which a conductive coil is to be deposited, while the ferrite closure has formed therein a second recess enclosing a portion of the conductive coil that is contributed to at least signal transducing. The end of the second recess is disposed in a position related with the depth of the tranducing gap. Since the first recess in which the conductive coil is deposited has no influence on the magnetic transducing efficiency, it can be much freely formed by photolithography or reactive ion etching. Also since the second recess having an influence on the magnetic transducing efficiency can be formed by precision machining, no advanced process control is needed.
摘要翻译：根据本发明的磁头具有铁氧体衬底和封闭件。铁氧体衬底在其中形成有要沉积导电线圈的第一凹部，而铁氧体封闭件在其中形成有封闭导电线圈的至少有助于至少信号传导的部分的第二凹部。第二凹部的端部设置在与调节间隙的深度相关的位置。由于其中沉积导电线圈的第一凹槽对磁转换效率没有影响，所以可以通过光刻或反应离子蚀刻来自由地形成。此外，由于可以通过精密加工形成对磁转换效率有影响的第二凹部，因此不需要先进的工艺控制。

2. 发明授权

US5032943A Magnetoresistive head having controlled reproduction output characteristics 失效
标题翻译：具有受控再现输出特性的磁阻头
公开(公告)号：US5032943A
公开(公告)日：1991-07-16
申请号：US314570
申请日：1989-02-23
申请人： Masao Katsumata , Kazuhiro Momata , Kazuyoshi Adachi , Kousaku Chida
发明人： Masao Katsumata , Kazuhiro Momata , Kazuyoshi Adachi , Kousaku Chida
IPC分类号： G11B5/02 , G11B5/39
CPC分类号： G11B5/3903 , G11B5/02
摘要： A magnetoresistive head including a magnetoresistive element in which the magnetoresistive head has a specifically determined gap length and/or the magnetoresistive element has a specifically determined magnetostriction constant to thereby define a reproduction output vs. operation current characteristic curve of the head. The above-mentioned gap length and/or magnetostriction constant is determined such that a saturation operation current for which a reproduction output of the head is maximum is higher than an operation current with which the head is operative.
摘要翻译：包括磁阻元件的磁阻头，其中磁阻头具有特定的间隙长度和/或磁阻元件具有特定确定的磁致伸缩常数，从而限定头的再现输出与操作电流特性曲线。确定上述间隙长度和/或磁致伸缩常数，使得头的再现输出最大的饱和操作电流高于头操作的操作电流。

3. 发明授权

US4796126A Magnetic head flying slider assembly 失效
标题翻译：磁头浮动滑块组件
公开(公告)号：US4796126A
公开(公告)日：1989-01-03
申请号：US904818
申请日：1986-09-08
申请人： Hiroshi Tsuchiya , Yoshiakira Karakama , Sadanori Nagaike , Hiroyasu Nakajima , Kousaku Chida
发明人： Hiroshi Tsuchiya , Yoshiakira Karakama , Sadanori Nagaike , Hiroyasu Nakajima , Kousaku Chida
IPC分类号： G11B5/31 , G11B5/60 , G11B21/21 , G11B5/187
CPC分类号： G11B5/3106 , G11B5/6005
摘要： A thin film magnetic head comprises a flying slider and a thin film transducer. The flying slider is formed as a polygonal body having a first face constituting a flying face and a second face normal to the first face, on which second face the thin film magnetic transducer is formed. The flying slider is made of a material containing Al.sub.2 O.sub.3 -TiC as the main constituent thereof and on the flying face of the slider is formed Al.sub.2 O.sub.3 -TiO.sub.2. The flying face exhibits an improved sliding property, while enabling use of the excellent features of Al.sub.2 O.sub.3 -TiC in forming the thin film element as well as in machining the flying slider. The slider can be produced by subjecting the flying face of the slider made of a material containing Al.sub.2 O.sub.3 -TiC to a gas phase reaction with an oxygen containing gas. Alternatively, a portion of the flying face can be removed and a layer of Al.sub.2 O.sub.3 -TiO.sub.2 deposited upon the surface of the flying face.
摘要翻译：薄膜磁头包括飞行滑块和薄膜换能器。飞行滑块形成为具有构成飞面的第一面和与第一面垂直的第二面的多边形体，第二面形成有薄膜磁换能器。飞行滑块由以Al2O3-TiC为主要成分的材料制成，滑块的飞面形成Al2O3-TiO2。飞面具有改善的滑动性能，同时能够在形成薄膜元件以及加工飞行滑块中使用Al2O3-TiC的优异特征。可以通过使由含有Al 2 O 3 -TiC的材料制成的滑块的飞面与含氧气体进行气相反应来制造滑块。或者，可以去除飞面的一部分并且沉积在飞面表面上的Al 2 O 3 -TiO层。

4. 发明授权

US4556925A Magnetoresistive head 失效
标题翻译：磁阻头
公开(公告)号：US4556925A
公开(公告)日：1985-12-03
申请号：US402419
申请日：1982-07-28
申请人： Masahide Suenaga , Kousaku Chida , Masaki Ohura
发明人： Masahide Suenaga , Kousaku Chida , Masaki Ohura
IPC分类号： G11B5/39 , H01L43/08 , G11B5/30
CPC分类号： G11B5/398 , G11B5/399 , H01L43/08
摘要： A magnetoresistive head comprising a magnetoresistive element, to which a magnetic bias field is applied, is disposed opposite to a magnetic recording medium moving relative thereto, and the resistance value of the magnetoresistive element varying as a result of the relative movement of the magnetoresistive element and the magnetic recording medium is detected to reproduce information recorded on the magnetic recording medium. The magnetoresistive element of the magnetic head has an elongate shape extending along the easy axis of magnetization and has protrusions at its longitudinal ends. The protrusions have, for example, a semicircular or triangular contour. These protrusions are effective for suppressing formation of undesirable domain walls in the magnetoresistive element, so that the magnetic head can operate without substantial variation of its output voltage level and with reduced Barkhousen noise.
摘要翻译：包括施加了磁偏置场的磁阻元件的磁阻磁头与相对于其移动的磁记录介质相对设置，并且磁阻元件的电阻值由于磁阻元件的相对移动而变化，检测磁记录介质以再现记录在磁记录介质上的信息。磁头的磁阻元件具有沿容易的磁化轴延伸的细长形状，并在其纵向端部具有突起。突起具有例如半圆形或三角形轮廓。这些突起对于抑制磁阻元件中不期望的畴壁的形成是有效的，使得磁头可以在其输出电压电平的实质变化和具有降低的Barkhousen噪声的情况下工作。

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