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    • 32. 发明授权
    • Compact MR write structure
    • 紧凑的MR写结构
    • US06466402B1
    • 2002-10-15
    • US09336646
    • 1999-06-18
    • Bill W. Crue, Jr.Zhupei ShiLijun TongCarlos Corona
    • Bill W. Crue, Jr.Zhupei ShiLijun TongCarlos Corona
    • G11B5147
    • G11B5/3967G11B5/3113G11B5/313
    • A compact write element for magnetically recording data on a magnetic medium and methods for making the same. The write element includes a conductive shield layer, an insulating write gap layer, a pole pedestal, a coil, and a conductive pole layer, with some embodiments further including a backgap. The pole pedestal, coil, and in some embodiments the backgap, constitute a self-aligned array of components that may be formed with a single masking operation to allow for very tight tolerances between the components for a shorter yoke length. The pole layer of the present invention is substantially flat and parallel to the conductive shield layer, providing for a shorter stack height. The present invention includes incorporation of the compact write element in both a read/write head and a magnetic data storage and retrieval system.
    • 用于在磁介质上磁记录数据的紧凑写入元件及其制造方法。 写元件包括导电屏蔽层,绝缘写间隙层,极基座,线圈和导电极层,一些实施例还包括后隙。 磁极基座,线圈,并且在一些实施例中为反向间隙,构成可以形成具有单个掩蔽操作的部件的自对准阵列,以允许用于更短磁轭长度的部件之间的非常严格的公差。 本发明的极层基本上是平的并且平行于导电屏蔽层,提供较短的叠层高度。 本发明包括将紧凑型写入元件并入读/写头和磁数据存储和检索系统中。
    • 33. 发明授权
    • Method and system for providing edge-junction TMR for high areal density magnetic recording
    • 为高密度磁记录提供边缘连接TMR的方法和系统
    • US06445554B1
    • 2002-09-03
    • US09523025
    • 2000-03-10
    • Zi-Weng DongZhupei Shi
    • Zi-Weng DongZhupei Shi
    • G11B539
    • B82Y25/00B82Y10/00G11B5/3903G11B5/3909G11B5/3932
    • A method and system for providing a magnetoresistive sensor for reading data from a recording media is disclosed. The method and system include providing a first barrier layer and a second barrier layer and providing a free layer disposed between the first barrier layer and the second barrier layer. The free layer is ferromagnetic. The method and system also include providing a first pinned layer and a second pinned layer. The first pinned layer and the second pinned layer are ferromagnetic. The first barrier layer is disposed between the first pinned layer and one edge of the free layer. The second barrier layer is disposed between the second pinned layer and another edge of the free layer. The method and system also include providing a first antiferromagnetic layer and a second antiferromagnetic layer. The first pinned layer is magnetically coupled to the first antiferromagnetic layer. The second pinned layer is magnetically coupled to the second antiferromagnetic layer. The first barrier layer is sufficiently thin to allow tunneling of charge carriers between the first pinned layer and the free layer. The second barrier layer is sufficiently thin to allow tunneling of charge carriers between the second pinned layer and the free layer. A longitudinal bias current through the tunneling junctions at the two edges of the free layer achieves a large MR ratio.
    • 公开了一种用于提供用于从记录介质读取数据的磁阻传感器的方法和系统。 该方法和系统包括提供第一阻挡层和第二阻挡层,并提供设置在第一阻挡层和第二阻挡层之间的自由层。 自由层是铁磁性的。 该方法和系统还包括提供第一被钉扎层和第二钉扎层。 第一被钉扎层和第二固定层是铁磁性的。 第一阻挡层设置在第一被钉扎层和自由层的一个边缘之间。 第二阻挡层设置在第二被钉扎层和自由层的另一个边缘之间。 该方法和系统还包括提供第一反铁磁层和第二反铁磁层。 第一被钉扎层磁耦合到第一反铁磁层。 第二被钉扎层磁耦合到第二反铁磁层。 第一阻挡层足够薄以允许电荷载流子在第一被钉扎层和自由层之间隧穿。 第二阻挡层足够薄以允许电荷载体在第二被钉扎层和自由层之间隧穿。 在自由层的两个边缘处穿过隧道结的纵向偏置电流实现了大的MR比。
    • 34. 发明授权
    • Thin film write head for improved high speed and high density recording
    • 薄膜写入头用于改进高速和高密度记录
    • US06353511B1
    • 2002-03-05
    • US09335155
    • 1999-06-15
    • Zhupei ShiLien-Chang WangBill CrueYingjian ChenSyed Hossain
    • Zhupei ShiLien-Chang WangBill CrueYingjian ChenSyed Hossain
    • G11B531
    • G11B5/3967G11B5/3109G11B5/3113G11B5/3116G11B5/313G11B5/3153G11B5/3163G11B5/455
    • A preferred embodiment provides a thin film write head having upper and lower pole structures each having pedestal pole tips formed with CoNiFe. The pedestal pole tips may have from about 60% to about 70% Co and from about 10% to about 15% Ni. The upper pole structure of the preferred embodiment has a laminated yoke portion having upper and lower layers. The lower layer is stitched to the pedestal pole tip of the upper pole structure and comprises FeXN, where X is selected from the group consisting of Rh, Ta, Hf, Al, Zr, Ti, Ru, Si, Cr, V, Si, Sr, Nb, Mo, Ru, and Pd. The upper layer comprises NiFe preferably having from about 15% to about 55% of Fe. It is preferred to define the lower layer of the yoke by etching FeXN material using the upper layer as a hard mask. In a preferred method and embodiment, the top surfaces of the conductor coil and the upper pedestal pole tip are planarized with an inorganic capping layer formed thereover to insulate the conductor coil from the yoke and to provide a low apex angle to form the yoke over.
    • 优选实施例提供一种具有上和下极结构的薄膜写头,每个具有由CoNiFe形成的基座极尖。 基座极尖可以具有约60%至约70%的Co和约10%至约15%的Ni。 优选实施例的上极结构具有具有上层和下层的层叠轭部分。 下层被缝合到上极结构的基座极端,并且包括FeXN,其中X选自Rh,Ta,Hf,Al,Zr,Ti,Ru,Si,Cr,V,Si, Sr,Nb,Mo,Ru和Pd。 上层包含优选具有约15%至约55%Fe的NiFe。 优选通过使用上层作为硬掩模蚀刻FeXN材料来限定轭的下层。 在优选的方法和实施例中,导体线圈和上基座极尖的顶表面与形成在其上的无机覆盖层平坦化,以使导体线圈与轭绝缘,并提供低顶角以形成轭。
    • 35. 发明授权
    • Low resistance coil structure for high speed writer
    • 低电阻线圈结构用于高速写入
    • US06333830B2
    • 2001-12-25
    • US09189059
    • 1998-11-09
    • Chuck RoseZhupei ShiKenneth E. Knapp
    • Chuck RoseZhupei ShiKenneth E. Knapp
    • G11B517
    • G11B5/3123G11B5/82
    • The present invention provides a thin film write head having an upper and lower pole structures and conductor turns forming a winding for generating magnetic flux. The conductor is formed with a non-planar top surface. The winding of the present invention may be formed of lower and upper turns. The upper turns may be formed with a non-planar top surface, a non-planar bottom surface, or both. It is preferred that the bottom surface of the upper conductor turns be coherent with the non-planar top surface of the lower conductor turns. The non-planar top surface may be formed by removing corners formed during deposition between a generally planar top surface and abutting side walls. The corners may be removed by ion milling to form the non-planar top surface. The conductor may be copper with the non-planar top surface having sloping facets. The thin film write head of the present invention may be utilized to provide an improved data storage and retrieval apparatus. The preferred embodiment provides reduced coil resistance thereby reducing Johnson Thermal Noise and power dissipation. It also allows for reduced yoke length and reduced stack height while providing low apex angles to expand and improve yoke material deposition thereby improving head response and operational frequency.
    • 本发明提供一种薄膜写入头,其具有上和下极结构以及形成用于产生磁通的绕组的导体匝。 导体形成有非平面顶表面。 本发明的绕组可以由下匝和上匝构成。 上匝可以形成有非平面顶表面,非平面底表面或两者。 优选地,上导体的底表面与下导体匝的非平面顶表面相干。 可以通过去除在大致平坦的顶表面和邻接侧壁之间的沉积期间形成的拐角来形成非平面顶表面。 可以通过离子研磨去除拐角以形成非平面顶表面。 导体可以是铜,其中非平面顶表面具有倾斜面。 本发明的薄膜写入头可以用于提供改进的数据存储和检索装置。 优选实施例提供减小的线圈电阻,从而减少约翰逊热噪声和功率耗散。 它还允许减小磁轭长度和减小堆叠高度,同时提供较低的顶角以扩展并改善磁轭材料沉积,从而提高磁头响应和操作频率。
    • 37. 发明授权
    • Magnetic head with a toroidal coil encompassing only one yoke layer
    • 磁头具有仅包含一个轭层的环形线圈
    • US06275354B1
    • 2001-08-14
    • US09010006
    • 1998-01-21
    • Yiming HuaiZhupei ShiYong ShenBilly Wayne Crue
    • Yiming HuaiZhupei ShiYong ShenBilly Wayne Crue
    • G11B5147
    • B82Y25/00B82Y10/00G11B5/313G11B5/3967G11B2005/3996
    • A magnetic head includes first and second magnetic yoke layers which contact each other at a back closure region at one end and delineate a transducer gap at another end. A toroidal coil encompasses one of the yoke layers. The coil axis of the toroidal coil passes through the encompassed yoke layer. During data writing, electrical current passes through the toroidal coil inducing magnetic flux along the coil axis, which flux is efficiently and directly delivered to the transducer gap for writing on a recording medium. During data reading, magnetic flux intercepted by the transducer gap flows along the encompassed yoke layer and efficiently induces electrical current in the toroidal coil for amplification. In alternative embodiments, separate read transducers are disposed adjacent to the toroidal coils to form merged heads.
    • 磁头包括在一端的后闭合区域彼此接触并在另一端描绘换能器间隙的第一和第二磁轭层。 环形线圈包围磁轭层之一。 环形线圈的线圈轴线穿过所包围的轭铁层。 在数据写入期间,电流通过环形线圈,引起沿着线圈轴的磁通量,该磁通有效地并直接传递到换能器间隙,以便在记录介质上进行写入。 在数据读取期间,由换能器间隙截取的磁通量沿着包围的磁轭层流动,并有效地在环形线圈中感应出电流用于放大。 在替代实施例中,单独的读取换能器被布置成与环形线圈相邻以形成合并的头部。
    • 40. 发明授权
    • Simulating discrete track media with continuous media for head evaluation
    • 模拟具有连续介质的离散轨道介质进行头部评估
    • US08395857B2
    • 2013-03-12
    • US12941482
    • 2010-11-08
    • Kezhao ZhangJizhong HeShanlin DuanJane Jie ZhangZhupei Shi
    • Kezhao ZhangJizhong HeShanlin DuanJane Jie ZhangZhupei Shi
    • G11B27/36G11B5/09
    • G11B27/36G11B5/455G11B5/743G11B2220/2516
    • Approaches for a testing device for selecting a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). The testing device comprises a continuous magnetic-recording disk, rotatably mounted on a spindle, which stores data using a continuous media format. The testing device also comprises a testing module configured to simulate reading data, stored using a discrete track media (DTM) format, from the continuous magnetic-recording medium. Advantageously, testing time and cost is reduced as both discrete track media (DTM) disks and expensive discrete track media (DTM) recording testing hardware are not required to select the optimal a discrete track media (DTM) format for use with a particular head of a hard-disk drive (HDD). In addition, embodiments may be used to optimize features of the tracks of the DTM disk, such as the land to groove ratio.
    • 用于选择与硬盘驱动器(HDD)的特定头部一起使用的离散轨道介质(DTM)格式的测试设备的方法。 测试装置包括可旋转地安装在主轴上的连续磁记录盘,其使用连续的媒体格式存储数据。 测试装置还包括被配置成模拟从连续磁记录介质中使用离散轨道介质(DTM)格式存储的读取数据的测试模块。 有利的是,测试时间和成本被降低,因为不需要离散轨道介质(DTM)盘和昂贵的离散轨道介质(DTM)记录测试硬件来选择最佳的离散轨道介质(DTM)格式,以用于特定的头 硬盘驱动器(HDD)。 此外,可以使用实施例来优化DTM盘的轨道的特征,例如陆地与凹槽之比。