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    Laminated write gap to improve writer performance
    1.
    发明授权
    Laminated write gap to improve writer performance 失效
    叠层写差距提高作家的表现

    公开(公告)号：US07525760B2

    公开(公告)日：2009-04-28

    申请号：US11104333

    申请日：2005-04-11

    申请人： Wen-Chien Hsiao ,  Terence Lam ,  Bernd Lamberts ,  Yinshi Liu ,  Terry Olson ,  Michael Yang ,  Samuel Yuan

    发明人： Wen-Chien Hsiao ,  Terence Lam ,  Bernd Lamberts ,  Yinshi Liu ,  Terry Olson ,  Michael Yang ,  Samuel Yuan

    IPC分类号： G11B5/235

    CPC分类号： G11B5/3116 ,  G11B5/235

    摘要： Embodiments of the present invention recite a write gap structure for a magnetic recording head. In one embodiment, the write gap structure comprises at least one layer of inert material is disposed proximate to the P2 pole of a magnetic recording head. A layer of magnetic material is disposed between the layer of inert material and the P1 pedestal (P1P) of the magnetic recording head. In embodiments of the present invention, the write gap structure further comprises a second layer of inert material is disposed between the layer of magnetic material and the P1P of the magnetic recording head. In embodiments of the present invention, the write gap structure only overlies a portion of the write gap of the magnetic recording head with reference to the throat height dimension of the write gap.

    摘要翻译： 本发明的实施例叙述磁记录头的写间隙结构。 在一个实施例中，写间隙结构包括至少一层惰性材料，靠近磁记录头的P2极设置。 磁性材料层设置在惰性材料层与磁记录头的P1基座（P1P）之间。 在本发明的实施例中，写间隙结构还包括第二层惰性材料设置在磁性材料层和磁记录头的P1P之间。 在本发明的实施例中，相对于写入间隙的喉部高度尺寸，写入间隙结构仅覆盖磁记录头的写入间隙的一部分。

    Process for fabricating a magnetic recording head with a laminated write gap
    4.
    发明授权
    Process for fabricating a magnetic recording head with a laminated write gap 失效
    用于制造具有层压写入间隙的磁记录头的工艺

    公开(公告)号：US07500302B2

    公开(公告)日：2009-03-10

    申请号：US11104212

    申请日：2005-04-11

    申请人： Wen-Chien Hsiao ,  Terence Lam ,  Yinshi Liu ,  Michael Yang ,  Samuel Yuan

    发明人： Wen-Chien Hsiao ,  Terence Lam ,  Yinshi Liu ,  Michael Yang ,  Samuel Yuan

    IPC分类号： G11B5/127 ,  H04R31/00

    CPC分类号： G11B5/3116 ,  G11B5/23 ,  G11B5/3163 ,  Y10T29/49032 ,  Y10T29/49043 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

    摘要： Embodiments of the present invention recite a process for fabricating a write gap structure for a magnetic recording head. In one embodiment, at least one layer of inert material is deposited which is disposed proximate to the P2 pole of a magnetic recording head. A layer of magnetic material is deposited which is disposed between the layer of inert material and the P1 pedestal (P1P) of the magnetic recording head. In embodiments of the present invention, a second layer of inert material is deposited which is disposed between the layer of magnetic material and the P1P of the magnetic recording head. In embodiments of the present invention, the throat height of the write gap structure is defined wherein the layer of magnetic material and the inert layer only overlie a portion of the P1 pedestal of the magnetic recording head.

    摘要翻译： 本发明的实施例背诵了一种用于制造用于磁记录头的写间隙结构的方法。 在一个实施例中，沉积至少一层惰性材料，其被布置成靠近磁记录头的P2极。 沉积磁性材料层，其设置在惰性材料层与磁记录头的P1基座（P1P）之间。 在本发明的实施例中，沉积第二层惰性材料，该层被设置在磁性材料层和磁记录头的P1P之间。 在本发明的实施例中，限定了写入间隙结构的喉部高度，其中磁性材料层和惰性层仅覆盖在磁记录头的P1基座的一部分上。

    Perpendicular magnetic write head having a magnetic write pole with a concave trailing edge
    5.
    发明申请
    Perpendicular magnetic write head having a magnetic write pole with a concave trailing edge 有权
    具有磁写入磁极的垂直磁性写头具有凹形后缘

    公开(公告)号：US20070258167A1

    公开(公告)日：2007-11-08

    申请号：US11411556

    申请日：2006-04-25

    申请人： Donald Allen ,  Amanda Baer ,  Michael Feldbaum ,  Hung-Chin Guthrie ,  Wen-Chien Hsiao ,  Yimin Hsu ,  Ming Jiang ,  Yinshi Liu ,  Aron Neuhaus ,  Vladimir Nikitin ,  Aron Pentek ,  Katalin Pentek ,  Yi Zheng

    发明人： Donald Allen ,  Amanda Baer ,  Michael Feldbaum ,  Hung-Chin Guthrie ,  Wen-Chien Hsiao ,  Yimin Hsu ,  Ming Jiang ,  Yinshi Liu ,  Aron Neuhaus ,  Vladimir Nikitin ,  Aron Pentek ,  Katalin Pentek ,  Yi Zheng

    IPC分类号： G11B5/147

    CPC分类号： G11B5/3116 ,  G11B5/11 ,  G11B5/1278 ,  G11B5/1871 ,  G11B5/3146 ,  G11B5/315 ,  G11B5/3163

    摘要： A magnetic write head for perpendicular magnetic recording having a write pole with a concave trailing edge. The magnetic write pole can have a trapezoidal shape with first and second laterally opposed sides that are further apart at the trailing edge than at the leading edge. The write head may or may not include a magnetic trailing shield, and if a trailing shield is included it is separated from the trailing edge by a non-magnetic write gap layer. The concave trailing edge improves magnetic performance such as by improving the transition curvature. A method for constructing the write head includes forming a magnetic write pole by forming a mask structure over a deposited write pole material, the mask structure having an alumina hard mask and an image transfer layer such as DURAMIDE®. An alumina fill layer is then deposited and a chemical mechanical polish is performed to open up the image transfer layer. A reactive on etch is performed to remove the image transfer layer and a reactive ion mill or reactive ion etch is performed to remove the alumina hard mask and form a concave surface on the write pole.

    摘要翻译： 用于垂直磁记录的磁写头，具有带有凹后缘的写极。 磁性写入极可以具有梯形形状，其中第一和第二横向相对侧在后缘处比在前缘处更远地分开。 写头可以包括或可以不包括磁性后屏蔽，并且如果包括后屏蔽，则其通过非磁性写间隙层与后缘分离。 凹形后边缘提高磁性能，例如通过改善转变曲率。 构成写入头的方法包括通过在沉积的写入极材料上形成掩模结构来形成磁性写入极，掩模结构具有氧化铝硬掩模和诸如DURAMIDE的图像转移层。 然后沉积氧化铝填充层，并执行化学机械抛光以打开图像转印层。 执行反应性蚀刻以去除图像转印层，并且执行反应性离子磨或反应离子蚀刻以除去氧化铝硬掩模并在写入极上形成凹面。

    METHOD AND APPARATUS FOR OPTIMIZING RECORD QUALITY WITH VARYING TRACK AND LINEAR DENSITY BY ALLOWING OVERLAPPING DATA TRACKS
    7.
    发明申请
    METHOD AND APPARATUS FOR OPTIMIZING RECORD QUALITY WITH VARYING TRACK AND LINEAR DENSITY BY ALLOWING OVERLAPPING DATA TRACKS 有权
    通过允许重写数据轨迹优化记录质量与改变轨迹和线性密度的方法和装置

    公开(公告)号：US20060227449A1

    公开(公告)日：2006-10-12

    申请号：US11104209

    申请日：2005-04-11

    申请人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Yuan

    发明人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui ,  Samuel Yuan

    IPC分类号： G11B21/02

    CPC分类号： G11B5/59633 ,  G11B5/012 ,  G11B2005/001

    摘要： A method and apparatus for optimizing data record quality on a disk for a pair of read and write heads, in which the write head is bigger, by adaptively varying linear and track density of overlapping recorded tracks to achieve a target storage capacity. In the method, target storage capacity and radial writing direction are selected. Read and write widths of heads are determined. A linear density and offset distance pairing for optimizing record quality at target storage capacity is determined, wherein offset distance is less than write width but greater than read width. The write head writes a track at the linear density, is offset in the radial direction by the offset distance, and the offset distance is stored. The write head writes a new track at the linear density. Offsetting, storing offset, and writing a new track are repeated until desired data is written into a cluster.

    摘要翻译： 一种用于通过自适应地改变重叠记录轨道的线性和轨道密度以实现目标存储容量来优化写头的一对读写头的盘上的数据记录质量的方法和装置。 在该方法中，选择目标存储容量和径向写入方向。 磁头读写宽度确定。 确定用于优化目标存储容量的记录质量的线性密度和偏移距离配对，其中偏移距离小于写入宽度但大于读取宽度。 写入头以线性密度写入轨迹，在径向上偏移偏移距离，并存储偏移距离。 写头以线性密度写入新的轨迹。 重复偏移，存储偏移和写入新轨道，直到所需数据写入群集。

    Magnetic head having a write coil structure with a reduced electrical resistance for reducing thermal protrusion
    8.
    发明申请
    Magnetic head having a write coil structure with a reduced electrical resistance for reducing thermal protrusion 失效
    磁头具有具有降低的电阻降低热突起的写入线圈结构

    公开(公告)号：US20050024764A1

    公开(公告)日：2005-02-03

    申请号：US10629060

    申请日：2003-07-29

    申请人： Wen-Chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

    发明人： Wen-Chien Hsiao ,  Edward Lee ,  Vladimir Nikitin ,  Samuel Yuan

    IPC分类号： G11B5/17 ,  G11B5/012 ,  G11B5/31 ,  G11B5/40

    CPC分类号： G11B5/3136 ,  G11B5/012 ,  G11B5/17 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/40

    摘要： Magnetic heads having write coil structures with reduced electrical resistances for reducing thermal protrusion are disclosed. In one illustrative example, a magnetic head includes a magnetic yoke; a write gap layer formed between upper and lower poles of the magnetic yoke; and a write coil having a plurality of coil layers. Each coil layer of the write coil extends continuously between the upper and the lower poles through a plane defined by the write gap layer. Preferably, the write coil is formed using a damascene process, such that each coil layer is wider than each coil separating layer. Such a structure provides for a relatively large amount of coil materials to be used, which reduces the coil's electrical resistance. This, in turn, reduces the heat generated by the write coils during operation. Further, either one or both of the lower and upper poles may include a horizontally laminated structure of alternating magnetic and non-magnetic dielectric layers to further reduce heating caused by eddy current losses. Since thermal protrusion is reduced, the fly height of magnetic head may be made relatively small with a reduced risk of head-to-disk crashes and disk scratches.

    摘要翻译： 公开了具有降低的电阻以减少热突起的具有写入线圈结构的磁头。 在一个说明性示例中，磁头包括磁轭; 形成在磁轭的上下极之间的写间隙层; 以及具有多个线圈层的写入线圈。 写入线圈的每个线圈层通过由写入间隙层限定的平面在上极和下极之间连续延伸。 优选地，写入线圈使用镶嵌工艺形成，使得每个线圈层比每个线圈分离层宽。 这种结构提供了相对大量的待使用的线圈材料，这降低了线圈的电阻。 这又减少了在操作期间由写入线圈产生的热量。 此外，下极和上极中的一个或两个可以包括交替的磁和非磁性介电层的水平层叠结构，以进一步减少由涡流损耗引起的加热。 由于热突起减少，所以磁头的飞行高度可以相对较小，同时降低了磁头与磁盘的碰撞和磁盘划痕的风险。

    Disk drive thin-film inductive write head with pole tip structure having reduced susceptibility to corrosion
    9.
    发明申请
    Disk drive thin-film inductive write head with pole tip structure having reduced susceptibility to corrosion 失效
    具有极尖结构的磁盘驱动器薄膜感应写头具有降低的腐蚀敏感性

    公开(公告)号：US20060198048A1

    公开(公告)日：2006-09-07

    申请号：US11073267

    申请日：2005-03-04

    申请人： Eric Flint ,  Wen-Chien Hsiao ,  Yiping Hsiao ,  Michael Yang

    发明人： Eric Flint ,  Wen-Chien Hsiao ,  Yiping Hsiao ,  Michael Yang

    IPC分类号： G11B5/147

    CPC分类号： G11B5/3116 ,  G11B5/31 ,  G11B5/313

    摘要： A disk drive thin-film write head structure has a pole tip structure with reduced susceptibility to corrosion. The write head has a first ferromagnetic pole tip that includes a pedestal pole layer and a capping layer on the pedestal pole layer. The capping layer has an extension and the write gap is located between the capping layer extension and the second pole tip. Substantially the entire thickness of the pedestal pole layer is formed of a lower-moment alloy and the capping layer is formed of a higher-moment alloy and is made thick enough to compensate for the lower-moment alloy in the pedestal pole layer. The pedestal pole layer may be a bilayer of two different alloys with the upper layer in the bilayer having a higher moment. The width of the pedestal pole layer is substantially reduced to reduce the pole tip area exposed. The reduced pole tip area and the increased use of lower-moment alloys enable a thinner protective film to be used to protect the pole tips from corrosion.

    摘要翻译： 磁盘驱动器薄膜写头结构具有磁极尖端结构，具有降低的腐蚀敏感性。 写头具有第一铁磁极端头，其包括基座极层和底座极层上的覆盖层。 封盖层具有延伸部，写入间隙位于封盖层延伸部和第二极端部之间。 基座极层的整个厚度基本上由较低的力矩合金形成，并且盖层由更高的力矩合金形成，并且被制成足够厚以补偿底座极层中的较小的力矩合金。 底座极层可以是两个不同合金的双层，双层中的上层具有较高的时间。 底座极层的宽度大大减小，以减小露出的极尖面积。 减小的极端面积和增加使用较低的力矩合金使得可以使用更薄的保护膜来保护极尖免受腐蚀。

    System, method, and apparatus for in-situ stray magnetic field measurement
    10.
    发明申请
    System, method, and apparatus for in-situ stray magnetic field measurement 失效
    用于原位杂散磁场测量的系统，方法和装置

    公开(公告)号：US20060092543A1

    公开(公告)日：2006-05-04

    申请号：US10977678

    申请日：2004-10-29

    申请人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    发明人： Xiaodong Che ,  Wen-Chien Hsiao ,  Yansheng Luo ,  Xiaoyu Sui

    IPC分类号： G11B15/04

    CPC分类号： G11B25/043 ,  G11B33/1493

    摘要： A hard disk drive (HDD) detects and measures external stray magnetic fields with existing HDD components. After detecting a strong external magnetic field, read and write operations of the HDD are suspended, and/or other proper corrective actions are taken to minimize loss of data. To measure the stray magnetic field, the magnetic head reader is used as a field sensor. The resistance of the reader changes in the presence of the field, such as with the preamp in the HDD. The resistance also changes with temperature. If the temperature inside the HDD is measured, the resistance change due to temperature is normalized. Even without being able to measure the HDD temperature, the stray magnetic field can be measured with a top head and a bottom head in the HDD. The temperature sensitivity of the reader is thereby cancelled out.

    摘要翻译： 硬盘驱动器（HDD）用现有的HDD组件来检测和测量外部杂散磁场。 在检测到强大的外部磁场之后，HDD的读取和写入操作被暂停，和/或采取其他适当的纠正措施以最小化数据丢失。 为了测量杂散磁场，磁头阅读器被用作场传感器。 读取器的电阻会在场的存在情况下发生变化，例如使用HDD中的前置放大器。 电阻也随温度而变化。 如果测量HDD内部的温度，则由于温度导致的电阻变化被归一化。 即使不能测量HDD温度，也可以用HDD中的顶部头部和底部头部来测量杂散磁场。 因此读取器的温度敏感度被抵消。