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1. 发明授权

US5373408A Configuring domain pattern in thin films of magnetic heads 失效
标题翻译：配置磁头薄膜中的畴图案
公开(公告)号：US5373408A
公开(公告)日：1994-12-13
申请号：US251304
申请日：1994-05-31
申请人： Peter G. Bischoff , Hua-Ching Tong , Johnny C. Chen
发明人： Peter G. Bischoff , Hua-Ching Tong , Johnny C. Chen
IPC分类号： G11B5/31 , G11B5/187
CPC分类号： G11B5/3113
摘要： A thin film magnetic head is fabricated with shaping magnetic thin films, preferably formed of Permalloy, which have a stepped configuration. The thin films are deposited between the insulation layer surrounding the electrical coil and below the second pole layer P2 to form a double yoke. The thin films have corners at the stepped areas which pin the domain sites so that the magnetization of the P2 layer is properly aligned, thereby improving the data signal that is being recorded.
摘要翻译：制造具有成形磁性薄膜的薄膜磁头，优选由坡莫合金形成，其具有阶梯形结构。薄膜沉积在围绕电线圈的绝缘层和第二极层P2之下，以形成双轭。薄膜在台阶区域有拐角，这些区域引导域位点，使得P2层的磁化正确对准，从而改善正在记录的数据信号。

2. 发明授权

US5312644A Method of making a magnetoresistive head with integrated bias and magnetic shield layer 失效
标题翻译：制造具有集成偏置和磁屏蔽层的磁阻头的方法
公开(公告)号：US5312644A
公开(公告)日：1994-05-17
申请号：US122690
申请日：1993-09-17
申请人： Theodore A. Schwarz , Peter G. Bischoff , Chak M. Leung , Johnny C. Chen , Pradeep Thayamballi
发明人： Theodore A. Schwarz , Peter G. Bischoff , Chak M. Leung , Johnny C. Chen , Pradeep Thayamballi
IPC分类号： G11B5/39 , H01F10/02
CPC分类号： G11B5/3912 , G11B5/3961
摘要： A thin-film magnetoresistive playback head having films providing magnetic shielding and magnetic bias. At least one of the magnetic shield layers is also conductive so that the functions of shielding and biasing are combined. Preferably, both shield layers are conductive. A multiple element channel head is disclosed in which the magnetic/conductive layers extend in series from one transducer section to the next, allowing a single bias current to bias all of the sections.
摘要翻译：具有提供磁屏蔽和磁偏置的膜的薄膜磁阻重放头。磁屏蔽层中的至少一个也是导电的，使得屏蔽和偏置的功能被组合。优选地，两个屏蔽层是导电的。公开了一种多元件通道头，其中磁/导电层从一个换能器部分串联延伸到下一个，允许单个偏置电流偏置所有部分。

3. 发明授权

US5311385A Magnetoresistive head with integrated bias and magnetic shield layer 失效
标题翻译：具有集成偏置和磁屏蔽层的磁阻头
公开(公告)号：US5311385A
公开(公告)日：1994-05-10
申请号：US809678
申请日：1991-12-18
申请人： Theodore A. Schwarz , Peter G. Bischoff , Chak M. Leung , Johnny C. Chen , Pradeep Thayamballi
发明人： Theodore A. Schwarz , Peter G. Bischoff , Chak M. Leung , Johnny C. Chen , Pradeep Thayamballi
IPC分类号： G11B5/39
CPC分类号： G11B5/3912 , G11B5/3961
摘要： A thin-film magnetoresistive playback head having films providing magnetic shielding and magnetic bias. At least one of the magnetic shield layers is also conductive so that the functions of shielding and biasing are combined. Preferably, both shield layers are conductive. A multiple element channel head is disclosed in which the magnetic/conductive layers extend in series from one transducer section to the next, allowing a single bias current to bias all of the sections.
摘要翻译：具有提供磁屏蔽和磁偏置的膜的薄膜磁阻重放头。磁屏蔽层中的至少一个也是导电的，使得屏蔽和偏置的功能被组合。优选地，两个屏蔽层是导电的。公开了一种多元件通道头，其中磁/导电层从一个换能器部分串联延伸到下一个，允许单个偏置电流偏置所有部分。

4. 发明授权

US5327310A Thin film contact recording head 失效
标题翻译：薄膜接触式记录头
公开(公告)号：US5327310A
公开(公告)日：1994-07-05
申请号：US904033
申请日：1992-06-25
申请人： Peter G. Bischoff , Chak M. Leung , Stephen S. Murray
发明人： Peter G. Bischoff , Chak M. Leung , Stephen S. Murray
IPC分类号： G11B5/31 , G11B5/60
CPC分类号： G11B5/6005 , G11B5/3106
摘要： A thin film magnetic head assembly useful for contact recording in a disk drive comprises an air bearing slider formed with only a single air bearing rail. The slider is substantially L-shaped having a leg portion on which a pedestal with an air bearing surface is provided. A wear pad is formed on the pedestal and encompasses the pole tips and transducing gap of the transducer. The wear pad makes contact with the magnetic disk during operation of the disk drive. The small area of the wear pad makes minimal contact with the surface of the magnetic disk so that frictional effects are significantly reduced thereby extending the wear life of the magnetic head. An alternative embodiment of a contact head slider uses a tripad design wherein the front pads fly relative to the disk and the rear pad which supports the transducer is in contact with the rotating disk during operation of a disk drive.
摘要翻译：用于磁盘驱动器中的接触记录的薄膜磁头组件包括仅由单个空气轴承导轨形成的空气轴承滑块。滑块基本上为L形，具有腿部，在其上设置有具有空气轴承表面的基座。在基座上形成耐磨垫片，并且包围传感器的极尖和换能间隙。在磁盘驱动器的操作过程中，磨损垫与磁盘接触。磨损垫的小区域与磁盘的表面最小接触，使得摩擦效果显着降低，从而延长了磁头的磨损寿命。接触头滑动器的替代实施例使用三角形设计，其中前板相对于盘飞行，并且在盘驱动器的操作期间支撑换能器的后垫与旋转盘接触。

5. 发明授权

US4694368A Thin film magnetic head with three superimposed coils 失效
标题翻译：薄膜磁头与三个叠加的线圈
公开(公告)号：US4694368A
公开(公告)日：1987-09-15
申请号：US817621
申请日：1986-01-10
申请人： Peter G. Bischoff , David J. Rauch , Vincent D. Retort , John R. Osborne
发明人： Peter G. Bischoff , David J. Rauch , Vincent D. Retort , John R. Osborne
IPC分类号： G11B5/17 , G11B5/31
CPC分类号： G11B5/313
摘要： A thin film magnetic head is made with a center-tapped coil structure formed of three layers of coils. The middle coil is configured to be bifilar. When recording data on a magnetic medium, current flows through one-half of the bifilar coil and through one adjacent coil to create positive transitions, and for negative transitions, current flows through the other half of the bifilar coil and through the other adjacent coil. When reading the data that is recorded on a magnetic medium, all turns of the entire coil configuration operate for transducing the data.
摘要翻译：薄膜磁头由三层线圈形成的中心抽头线圈结构制成。中间线圈配置为双线。当在磁性介质上记录数据时，电流流过双线圈的一半并通过一个相邻的线圈产生正转变，而对于负转变，电流流过双线圈的另一半并通过另一个相邻线圈。当读取记录在磁性介质上的数据时，整个线圈配置的所有匝都用于传送数据。

6. 发明授权

US4517616A Thin film magnetic recording transducer having embedded pole piece design 失效
标题翻译：具有嵌入式极片设计的薄膜磁记录传感器
公开(公告)号：US4517616A
公开(公告)日：1985-05-14
申请号：US479224
申请日：1983-03-28
申请人： Peter G. Bischoff
发明人： Peter G. Bischoff
IPC分类号： G11B5/31 , H01F41/34 , G11B5/16
CPC分类号： H01F41/34 , G11B5/3163 , Y10S428/90 , Y10T428/1186 , Y10T428/24545
摘要： The subject invention relates to the fabrication of metal oxide patterns on a substrate adapted for use with thin film magnetic heads. The metal oxide pattern has a precisely defined geometry including nearly vertical side walls, for minimizing read/write errors. In addition, a filler material formed from a non-magnetic, non-metallic compound is provided on the substrate in a pattern complimentary to the metal oxide pattern. In accordance with the subject invention, the top surface of the metal oxide pattern and the filler material are co-planar. By this arrangement, subsequent layers may be uniformly deposited without discontinuities. The subject method includes a plurality of distinct masking and etching steps in order to achieve the desired result.
摘要翻译：本发明涉及在适用于薄膜磁头的衬底上制造金属氧化物图案。金属氧化物图案具有精确限定的几何形状，包括几乎垂直的侧壁，用于最小化读/写错误。此外，由非磁性非金属化合物形成的填充材料以与金属氧化物图案互补的图案提供在基板上。根据本发明，金属氧化物图案的顶表面和填充材料是共面的。通过这种布置，随后的层可以不间断地均匀地沉积。主题方法包括多个不同的掩蔽和蚀刻步骤，以便实现期望的结果。

7. 发明授权

US5886959A Thin-film electro-magnetic coil design for use in a flying magneto-optical head 失效
标题翻译：用于飞行磁光头的薄膜电磁线圈设计
公开(公告)号：US5886959A
公开(公告)日：1999-03-23
申请号：US19225
申请日：1998-02-04
申请人： Peter G. Bischoff , Yugang Wang
发明人： Peter G. Bischoff , Yugang Wang
IPC分类号： G11B5/127 , G11B5/17 , G11B5/31 , G11B7/12 , G11B7/135 , G11B11/105 , G11B11/00
CPC分类号： G11B7/1384 , G11B11/10534 , G11B11/1058 , G11B7/122 , G11B11/10543 , G11B11/10554 , G11B5/1278 , G11B5/17 , G11B5/313
摘要： A thin-film coil for use in a flying magneto-optical data storage system is formed on an undercoat layer, and includes an underside and a conductor deposited on the undercoat layer. The conductor is covered by an insulation layer on which a yoke is formed for providing a path to a magnetic field generated by the conductor. The yoke is formed of three sections: an upper section, an intermediate section, and the tip. The yoke tip defines an optical opening and has its underside substantially flush with the underside of the undercoat layer for increasing the density of the magnetic field at a target distance from the coil. The yoke tip underside is defined by an inner edge that delineates the optical opening, and that is formed of two semi-circular sections and two linear sections tangential to the semi-circular sections. The yoke can optionally include an outer section that extends over the peripheral side of the insulation layer and that further extends in an enlarged toe section.
摘要翻译：用于飞行磁光数据存储系统的薄膜线圈形成在底涂层上，并且包括下侧和沉积在底涂层上的导体。导体被绝缘层覆盖，其上形成有轭以提供由导体产生的磁场的路径。磁轭由三部分组成：上部，中间部分和末端。轭头限定了光学开口，并且其下侧基本上与底涂层的下侧齐平，以增加距离线圈的目标距离处的磁场的密度。轭尖下侧由描绘光学开口的内边缘限定，并且由两个半圆形部分和与半圆形切片相切的两个直线部分形成。磁轭可以可选地包括在绝缘层的周边侧延伸并且在扩大的脚趾部分中进一步延伸的外部部分。

8. 发明授权

US4436593A Self-aligned pole tips 失效
标题翻译：自对准极点
公开(公告)号：US4436593A
公开(公告)日：1984-03-13
申请号：US282540
申请日：1981-07-13
申请人： John R. Osborne , Peter G. Bischoff
发明人： John R. Osborne , Peter G. Bischoff
IPC分类号： G11B5/31 , G11B5/42
CPC分类号： G11B5/3163 , Y10T29/49044 , Y10T29/49046
摘要： A method is disclosed for precisely aligning the pole tips of a thin film magnetic head. Two separate metallic layers, such as Permalloy (Ni-Fe alloy) are separated by a layer of insulating material such as silicon dioxide or AL.sub.2 O.sub.3 which will serve as the insulative spacer of the final magnetic head. A photo-resist is applied to the surface of the top metallic layer in an imagewise configuration to establish the shape of the top pole. The top pole is then etched and the photo-resist removed. The top electrode is then encapsulated with a protective metal and is used as a mask during the chemical etching of the insulative layer, the bottom electrode being used as an etch stop. This integral structure is then used as a mask during the chemical etching of the bottom electrode, resulting in pole tips which are precisely aligned.
摘要翻译：公开了一种用于精确对准薄膜磁头的极尖的方法。两个单独的金属层，例如坡莫合金（Ni-Fe合金）被绝缘材料层（例如二氧化硅或AL 2 O 3）隔开，其将用作最终磁头的绝缘间隔物。以成像方式将光致抗蚀剂施加到顶部金属层的表面，以确定顶极的形状。然后蚀刻顶极，并除去光致抗蚀剂。然后用保护金属封装顶部电极，并且在绝缘层的化学蚀刻期间用作掩模，底部电极用作蚀刻停止。然后在底电极的化学蚀刻期间将该整体结构用作掩模，产生精确对准的极尖。

9. 发明授权

US5949627A Thin film magnetic head with stress relief layering 失效
标题翻译：薄膜磁头与应力消除分层
公开(公告)号：US5949627A
公开(公告)日：1999-09-07
申请号：US20306
申请日：1993-02-19
申请人： Edgar M. Williams , Peter G. Bischoff , Daniel A. Nepela
发明人： Edgar M. Williams , Peter G. Bischoff , Daniel A. Nepela
IPC分类号： G11B5/31 , G11B5/147
CPC分类号： G11B5/3146 , G11B5/3106 , G11B5/3113 , G11B5/3133
摘要： A thin film magnetic head is fabricated having soft metal layers of 0.25 to 1 micron thickness disposed on each side of the first and second magnetic layers of Permalloy forming the magnetic yoke. The soft layers are formed between the ceramic substrate and the first Permalloy layer, between the first Permalloy layer and the insulation surrounding the electrical coil of the head, between the insulation and the second Permalloy layer, and between the second Permalloy layer and the insulating overcoat of the head. The soft metal has a coefficient of thermal expansion between that of the Permalloy and that of the ceramic substrate and insulation materials. In this way, stress buffers are provided to minimize the mismatch and thermal stress transfer between the Permalloy and the other materials of the adjacent layers, resulting in improved domain stability and a significant reduction in popcorn noise.
摘要翻译：制造薄膜磁头，其具有设置在形成磁轭的坡莫合金的第一和第二磁性层的每一侧上的具有0.25至1微米厚度的软金属层。软陶瓷层形成在陶瓷基板和第一坡莫合金层之间，在第一坡莫合金层与围绕电线圈的绝缘体，绝缘层和第二坡莫合金层之间以及第二坡莫合金层与绝缘外涂层之间的头。软金属具有与坡莫合金和陶瓷基体与绝缘材料的热膨胀系数之比。以这种方式，提供应力缓冲器以最小化坡莫合金和相邻层的其它材料之间的失配和热应力传递，导致改进的结构域稳定性和爆米花噪声的显着降低。

10. 发明授权

US5452168A Thin film magnetic heads with multiple yokes 失效
标题翻译：带多个轭的薄膜磁头
公开(公告)号：US5452168A
公开(公告)日：1995-09-19
申请号：US280577
申请日：1994-07-25
申请人： Daniel A. Nepela , Shih-Cheng Cheng , Erich P. Valstyn , Edgar M. Williams , Peter G. Bischoff
发明人： Daniel A. Nepela , Shih-Cheng Cheng , Erich P. Valstyn , Edgar M. Williams , Peter G. Bischoff
IPC分类号： G11B5/127 , G11B5/17 , G11B5/31 , G11B5/147
CPC分类号： G11B5/313 , G11B5/3163
摘要： A thin film magnetic head is fabricated with a multiplicity of magnetic yokes that interact effectively with an electrical coil. The magnetic P1 and P2 pole sections of the yoke are very narrow and form closely spaced envelopes about the coil. The multiple yokes are inductively linked to the coil so as to provide an increased number of flux interactions for a given length of coil turn. With this magnetic head design, signal output is increased, thermal noise is reduced, and the signal-to-noise ratio is effectively improved.
摘要翻译：制造具有与电线圈有效相互作用的多个磁轭的薄膜磁头。轭的磁性P1和P2极部非常窄，并且围绕线圈形成紧密间隔的包络。多个轭体与线圈感应连接，以便在给定长度的线圈匝中提供增加数量的磁通相互作用。利用这种磁头设计，信号输出增加，热噪声降低，并且有效地提高了信噪比。

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