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公开(公告)号：US5181152A
公开(公告)日：1993-01-19
申请号：US660410
申请日：1991-02-22
申请人： Ying D. Yan , John Bortins , Beat G. Keel , Nurul Amin
发明人： Ying D. Yan , John Bortins , Beat G. Keel , Nurul Amin
IPC分类号： G11B5/31
CPC分类号： G11B5/3143 , Y10T29/49032
摘要： A thin film magnetic read/write head deposited upon a non-magnetic substrate reduces leading edge undershoots in readback pulse signal. A magnetic layer is deposited between the thin film magnetic read/write head and the non-magnetic substrate. Undershoots are reduced by making the leading edge of the thin film head less sensitive to the magnetization transitions in a magnetic storage medium.
摘要翻译： 沉积在非磁性衬底上的薄膜磁读/写头减少了回读脉冲信号中的前沿下冲。 磁性层沉积在薄膜磁读/写头和非磁性基片之间。 通过使薄膜头的前缘对磁存储介质中的磁化转变较不敏感来减少下冲。
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公开(公告)号：US5406434A
公开(公告)日：1995-04-11
申请号：US263009
申请日：1994-06-20
申请人： Nurul Amin , John Bortins , Ying D. Yan , Beat G. Keel , Nathan Curland , Tim Madsen
发明人： Nurul Amin , John Bortins , Ying D. Yan , Beat G. Keel , Nathan Curland , Tim Madsen
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/3163 , Y10T29/49044
摘要： A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; etch of the sacrificial layer which lifts-off overlying partial lapping or chemical etch followed by chemical Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically, etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer. The thin film magnetic head of the present invention has pole tips which provide an outside pole face contour that is significantly different from a pole tip contour along a gap region. This reduces an undershoot effect in readback pulses in a readback signal. The altered contour can be used on both top and bottom pole tips to eliminate both leading and trailing undershoots. Additionally, in shielded probe heads for vertical recording a gap region contour can be altered to achieve a similar reduction in leading undershoot.
摘要翻译： 使用Al2O3坝制造薄膜磁读/写头。 使用沉积在底极层上的牺牲层来形成Al 2 O 3坝。 在牺牲层上沉积Al 2 O 3层。 当牺牲层被去除时，Al 2 O 3层形成在其上沉积顶极片之间的堤坝。 使用研磨和选择的化学蚀刻去除牺牲层; 牺牲层的蚀刻，其覆盖部分研磨或化学蚀刻，然后是化学Al 2 O 3; 沉积光致抗蚀剂坝并进行化学蚀刻，蚀刻封装层和牺牲层; 或通过在零偏压下溅射的Al 2 O 3层的物理或热冲击进行去除，随后对牺牲层进行选择性化学蚀刻。 本发明的薄膜磁头具有极尖，其提供与极尖轮廓沿间隙区域显着不同的外极面轮廓。 这可以减少回读信号中的回读脉冲中的下冲作用。 改变的轮廓可以在顶部和底部极尖上使用，以消除前方和后方的下冲。 另外，在用于垂直记录的屏蔽探头中，可以改变间隙区域轮廓以实现引导下冲的类似的减小。
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公开(公告)号：US5373624A
公开(公告)日：1994-12-20
申请号：US960791
申请日：1992-10-14
申请人： Ying D. Yan , John Bortins , Beat G. Keel , Nurul Amin
发明人： Ying D. Yan , John Bortins , Beat G. Keel , Nurul Amin
CPC分类号： G11B5/3143 , Y10T29/49032
摘要： A thin film magnetic read/write head deposited upon a non-magnetic substrate reduces leading edge undershoots in readback pulse signal. A magnetic layer is deposited between the thin film magnetic read/write head and the non-magnetic substrate. Undershoots are reduced by making the leading edge of the thin film head less sensitive to the magnetization transitions in a magnetic storage medium.
摘要翻译： 沉积在非磁性衬底上的薄膜磁读/写头减少了回读脉冲信号中的前沿下冲。 磁性层沉积在薄膜磁读/写头和非磁性基片之间。 通过使薄膜头的前缘对磁存储介质中的磁化转变较不敏感来减少下冲。
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公开(公告)号：US5084957A
公开(公告)日：1992-02-04
申请号：US609921
申请日：1990-11-06
申请人： Nurul Amin , John Bortins , Beat G. Keel , Ying D. Yan
发明人： Nurul Amin , John Bortins , Beat G. Keel , Ying D. Yan
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/3163 , Y10T29/49044 , Y10T29/49064
摘要： A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; partial lapping or chemical etch followed by chemical etch of the sacrificial layer which lifts-off overlying Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer.
摘要翻译： 使用Al2O3坝制造薄膜磁读/写头。 使用沉积在底极层上的牺牲层来形成Al 2 O 3坝。 在牺牲层上沉积Al 2 O 3层。 当牺牲层被去除时，Al 2 O 3层形成在其上沉积顶极片之间的堤坝。 使用研磨和选择的化学蚀刻去除牺牲层; 部分研磨或化学蚀刻，然后是上覆Al2O3的牺牲层的化学蚀刻; 沉积光刻胶坝并化学蚀刻封装层和牺牲层; 或通过在零偏压下溅射的Al 2 O 3层的物理或热冲击进行去除，随后对牺牲层进行选择性化学蚀刻。
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5.发明授权Method of making a thin film head with contoured pole face edges for undershoot reduction 失效制造具有成型极面边缘以用于下冲还原的薄膜头的方法
公开(公告)号：US5137750A
公开(公告)日：1992-08-11
申请号：US702956
申请日：1991-05-20
申请人： Nurul Amin , John Bortins , Ying D. Yan , Beat G. Keel , Nathan Curland , Tim Madsen
发明人： Nurul Amin , John Bortins , Ying D. Yan , Beat G. Keel , Nathan Curland , Tim Madsen
CPC分类号： G11B5/1278 , G11B5/3116 , G11B5/3163 , Y10T29/49044
摘要： A thin film magnetic read/write head is manufactured using Al.sub.2 O.sub.3 dams. The Al.sub.2 O.sub.3 dams are formed using a sacrificial layer which is deposited upon a bottom pole layer. An Al.sub.2 O.sub.3 layer is deposited over the sacrificial layer. When the sacrificial layer is removed, the Al.sub.2 O.sub.3 layer forms dams between which a top pole piece is deposited. The sacrificial layer is removed using lapping and a selected chemical etch; partial lapping or chemical etch followed by chemical etch of the sacrificial layer which lifts-off overlying Al.sub.2 O.sub.3 ; depositing photoresist dams and chemically etching the encapsulation layer and the sacrificial layer; or removal through physical or thermal shock of the Al.sub.2 O.sub.3 layer sputtered at zero bias followed by a selective chemical etch of the sacrificial layer. The thin film magnetic head of the present invention has pole tips which provide an outside pole face contour that is significantly different from a pole tip contour along a gap region. This reduces an undershoot effect in readback pulses in a readback signal. The altered contour can be used on both top and bottom pole tips to eliminate both leading and trailing undershoots. Additionally, in shielded probe heads for vertical recording a gap region contour can be altered to achieve a similar reduction in leading undershoot.
摘要翻译： 使用Al2O3坝制造薄膜磁读/写头。 使用沉积在底极层上的牺牲层来形成Al 2 O 3坝。 在牺牲层上沉积Al 2 O 3层。 当牺牲层被去除时，Al 2 O 3层形成在其上沉积顶极片之间的堤坝。 使用研磨和选择的化学蚀刻去除牺牲层; 部分研磨或化学蚀刻，然后是上覆Al2O3的牺牲层的化学蚀刻; 沉积光刻胶坝并化学蚀刻封装层和牺牲层; 或通过在零偏压下溅射的Al 2 O 3层的物理或热冲击进行去除，随后对牺牲层进行选择性化学蚀刻。 本发明的薄膜磁头具有极尖，其提供与极尖轮廓沿间隙区域显着不同的外极面轮廓。 这可以减少回读信号中的回读脉冲中的下冲作用。 改变的轮廓可以在顶部和底部极尖上使用，以消除前方和后方的下冲。 另外，在用于垂直记录的屏蔽探头中，可以改变间隙区域轮廓以实现引导下冲的类似的减小。
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公开(公告)号：US5198948A
公开(公告)日：1993-03-30
申请号：US622558
申请日：1990-12-05
CPC分类号： G11B5/3143 , G11B5/4886
摘要： A servo head in a disk file data storage system includes at least one shield which acts to block radiation emanating from a nearby data head and thus reduce noise induced in the servo head. The shield is located on either side of an essentially flat conducting coil in a servo transducer, or a data transducer or both. The shield may be either a single layer of material or multiple layers.
摘要翻译： 磁盘文件数据存储系统中的伺服磁头包括至少一个屏蔽件，其用于阻止从附近的数据磁头发出的辐射，从而减少伺服磁头引起的噪声。 屏蔽位于伺服换能器中的基本平坦的导电线圈的两侧，或数据换能器或两者之间。 屏蔽可以是单层材料或多层。
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公开(公告)号：US5699605A
公开(公告)日：1997-12-23
申请号：US421429
申请日：1995-04-12
申请人： Nurul Amin , John Bortins , Ying Yan
发明人： Nurul Amin , John Bortins , Ying Yan
CPC分类号： G11B5/3163 , G11B5/3103 , G11B5/313 , Y10T29/49044
摘要： A thin film magnetic head is carried in a recessed region which is etched in a basecoat. The thin film magnetic head includes upper and lower pole pieces having an upper pole tip and a lower pole tip, respectively. The upper and lower pole tips form a magnetic flux gap. Electrical conductors are carried in an insulating layer between the upper and lower pole pieces. The magnetic flux gap defines a plane which is generally parallel with a plane defined by the conductors. The electrical conductors lie on either side of the plane.
摘要翻译： 薄膜磁头被承载在基底蚀刻的凹陷区域中。 薄膜磁头包括分别具有上极端和下极端的上极片和下磁极片。 上下极尖形成磁通隙。 电导体承载在上极靴和下极靴之间的绝缘层中。 磁通量间隙限定了与由导体限定的平面大致平行的平面。 电导体位于平面的两侧。
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8.发明授权Methods of improved servo head passive noise cancellation by placement and orientation of multiple servo transducers 失效通过多个伺服传感器的放置和定向改进伺服头无源噪声消除的方法
公开(公告)号：US5210669A
公开(公告)日：1993-05-11
申请号：US573878
申请日：1990-08-27
CPC分类号： G11B5/596 , G11B5/11 , G11B5/4886 , G11B5/5526
摘要： A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head will cancel. The two servo transducers are located an equal distance from the data transducer. The pole tips of the first servo transducer are positioned to read servo information stored on an adjacent servo disk. The pole tips of the second servo transducer are oriented away from the servo disk surface to prevent the second servo transducer from reading an unwanted signal from the servo disk.
摘要翻译： 磁盘文件数据存储系统中的伺服磁头包括两个连接的伺服传感器，使得由附近写入数据磁头引起的噪声将被取消。 两个伺服传感器位于与数据传感器相等的距离处。 第一伺服传感器的极尖定位成读取存储在相邻伺服盘上的伺服信息。 第二伺服传感器的极尖取向远离伺服盘表面，以防止第二伺服传感器从伺服盘读取不需要的信号。
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9.发明授权Servo head with close servo transducer placement for improved passive noise cancellation 失效伺服头具有紧密的伺服传感器放置，可改善无源噪声消除
公开(公告)号：US5471354A
公开(公告)日：1995-11-28
申请号：US248756
申请日：1994-05-25
CPC分类号： G11B5/5526 , G11B5/11 , G11B5/4886 , G11B5/596
摘要： A servo head in a disk file data storage system includes two servo transducers which are connected so that noise induced by a nearby writing data head cancels. The first servo transducer, mounted on a slider, reads information stored on a servo disk. A second servo transducer, also located on the slider, is connected to the first servo transducer to produce an output signal so that noise signals induced in the first servo transducer by operation of the data transducer tend to be canceled by noise signals induced in the second servo transducer by operation of the data transducer. The two servo transducers are located such that they are closely spaced relative to the size of the servo transducers. The close proximity of the two servo transducers reduces the effect of unequal shielding from noise signals induced in the two servo transducers by the data head.
摘要翻译： 磁盘文件数据存储系统中的伺服磁头包括两个连接的伺服传感器，使得由附近写入数据磁头引起的噪声消除。 安装在滑块上的第一个伺服传感器读取存储在伺服盘上的信息。 也位于滑动器上的第二伺服传感器连接到第一伺服换能器以产生输出信号，使得通过数据传感器的操作在第一伺服换能器中感应的噪声信号倾向于通过在第二伺服传感器中感应的噪声信号来消除 伺服传感器通过数据传感器的操作。 这两个伺服传感器的位置使得它们相对于伺服换能器的尺寸紧密地间隔开。 两个伺服传感器的紧密接近减少了由数据头在两个伺服传感器中感应到的噪声信号的不平等屏蔽的影响。
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公开(公告)号：US4150440A
公开(公告)日：1979-04-17
申请号：US885712
申请日：1978-03-13
CPC分类号： G11C19/085
摘要： A bubble memory package is comprised of a nonmagnetizable heat sink formed with a pocket for receiving the field coil and magnetic chip carrier assemblies. The heat sink is massive and capable of dissipating the heat generated by a high density memory operating at a high frequency. The heat sink is not closed over the top of the coil and memory carrier assemblies to reduce eddy and circulating electrical currents formed in an electrically conductive heat sink. The heat sink is formed with a track guide for receiving a heat sink plate which may be of electrically nonconductive material but which has sufficient heat conductivity to assist in transferring heat into the heat sink. The top of the heat sink plate is formed with a pocket for receiving a permanent magnet to generate the bias field and the bottom of the heat sink is formed with a second pocket for receiving a magnet assembly. The entire package is surrounded by a magnetic shield container.
摘要翻译： 气泡存储器封装包括形成有用于接收励磁线圈和磁芯片载体组件的凹槽的不可磁化散热器。 散热器是巨大的，能够消散由高频率操作的高密度存储器产生的热量。 散热器没有封闭在线圈和存储器载体组件的顶部上，以减少形成在导电散热器中的涡流和循环电流。 散热器形成有轨道引导件，用于接纳散热板，该散热板可以是非导电材料，但是具有足够的导热性以有助于将热传递到散热器中。 散热板的顶部形成有用于接收永磁体以产生偏置场的凹部，并且散热器的底部形成有用于接收磁体组件的第二凹部。 整个包装被磁屏蔽容器包围。
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