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187 条记录 (耗时 0.078 秒)

    PMR write with flux choking area
    32.
    发明授权
    PMR write with flux choking area 有权

    公开(公告)号：US08085498B2

    公开(公告)日：2011-12-27

    申请号：US12586249

    申请日：2009-09-17

    申请人： Zhigang Bai ,  Yue Liu ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

    发明人： Zhigang Bai ,  Yue Liu ,  Kowang Liu ,  Yan Wu ,  Moris Dovek

    IPC分类号： G11B5/127

    CPC分类号： G11B5/3116 ,  G11B5/1278 ,  G11B5/3163

    摘要： A PMR writer having a trailing shield structure is disclosed in which a flux choking layer (FCL) formed adjacent to the ABS provides a means to limit the amount of flux flowing from the trailing shield to a first write shield (WS1) near the write pole tip thereby significantly reducing adjacent track erasure. The FCL has a substantially smaller thickness than a top section of the trailing shield to which it is attached along a side opposite the ABS. As a result, pole tip protrusion is reduced compared to prior art PMR writers. The FCL contacts a trailing side of WS1 at the ABS and one or both of the trailing sides of the WS1 and FCL may be tapered or perpendicular with respect to the ABS. The top trailing shield section, FCL, and WS1 may be comprised of NiFe, CoFe, CoFeNi, or alloys thereof.

    Back Channel Communication
    34.
    发明申请
    Back Channel Communication 有权
    后通道通讯

    公开(公告)号：US20110167325A1

    公开(公告)日：2011-07-07

    申请号：US13046991

    申请日：2011-03-14

    申请人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    发明人： Massimo Sorbara ,  Patrick Duvaut ,  Yan Wu

    IPC分类号： G06F11/07

    CPC分类号： H04L12/66 ,  H04B3/32

    摘要： Various embodiments are described for back channel communication. One embodiment is a method that comprises receiving data at customer premises equipment (CPE), determining at least one error in the received data, formatting the determined error for communication to a central office (CO), and sending the formatted error to the CO via a back channel, wherein the formatted error is sent between sync frames of a discrete multitone (DMT) superframe.

    摘要翻译： 对于后向信道通信描述了各种实施例。 一个实施例是一种方法，其包括在客户驻地设备（CPE）处接收数据，确定接收到的数据中的至少一个错误，将确定的错误格式化为中心局（CO），并将格式化的错误发送到CO经由 背信道，其中格式化的错误在离散多音（DMT）超帧的同步帧之间发送。

    External field robustness of read/write head shields
    35.
    发明申请
    External field robustness of read/write head shields 有权
    读/写头屏蔽的外部场强鲁棒性

    公开(公告)号：US20110097602A1

    公开(公告)日：2011-04-28

    申请号：US12589598

    申请日：2009-10-26

    申请人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

    发明人： Zhigang Bai ,  Yuchen Zhou ,  Joe Smyth ,  Moris Dovek ,  Yan Wu

    IPC分类号： G11B5/33 ,  B44C1/22

    CPC分类号： G11B5/1278 ,  G11B5/315 ,  G11B5/6011 ,  Y10T428/1171

    摘要： An improved magnetic shield for a perpendicular magnetic write head is disclosed. Its main feature is a pair of tabs at the shield's bottom corners. Said tabs are significantly wider at their point of attachment to the shield than further away from the shield. The end portions of each tab slope upwards (away from the ABS) at an angle of about ten degrees. A process for manufacturing the shield is also disclosed.

    摘要翻译： 公开了用于垂直磁写头的改进的磁屏蔽。 它的主要特征是盾牌底角上的一对标签。 所述突片在其远离屏蔽件的位置处与屏蔽件的连接点明显更宽。 每个翼片的端部以大约十度的角度向上（远离ABS）倾斜。 还公开了一种用于制造屏蔽的工艺。

    Wrap-around shielded writer with highly homogeneous shield material
    36.
    发明申请
    Wrap-around shielded writer with highly homogeneous shield material 有权
    带有高度均匀的屏蔽材料的环绕屏蔽作者

    公开(公告)号：US20110097601A1

    公开(公告)日：2011-04-28

    申请号：US12589597

    申请日：2009-10-26

    申请人： Zhigang Bai ,  Yan Wu ,  Moris Dovek ,  Cherng Chyi Han

    发明人： Zhigang Bai ,  Yan Wu ,  Moris Dovek ,  Cherng Chyi Han

    IPC分类号： G11B5/33

    CPC分类号： G11B5/6082 ,  G11B5/112 ,  G11B5/1278 ,  G11B5/315 ,  G11B5/3163 ,  Y10T428/1171

    摘要： A perpendicular magnetic recording (PMR) head is fabricated with a main pole shielded laterally by a pair of side shields, shielded above by a trailing shield and shielded optionally below by a leading shield. The shields and the seed layers on which they are formed are formed of materials having substantially the same physical characteristics including the same material composition, the same hardness, the same response to processes such as ion beam etching (IBE), chemical mechanical polishing (CMP), mechanical lapping, such as the slider ABS lapping, the same coefficient of thermal expansion (CTE) as well as the same Bs. Optionally, the trailing shield may be formed on a high Bs seed layer to provide the write head with improved down-track performance.

    摘要翻译： 垂直磁记录（PMR）头被制造成具有由一对侧屏蔽横向屏蔽的主极，屏蔽在后面并由屏蔽罩屏蔽并且被前屏蔽罩屏蔽。 其形成的屏蔽层和种子层由具有相同物理特性的材料形成，包括相同的材料组成，相同的硬度，对离子束蚀刻（IBE），化学机械抛光（CMP） ），机械研磨，如滑块ABS研磨，相同的热膨胀系数（CTE）以及相同的Bs。 可选地，后屏蔽可以形成在高Bs种子层上，以向写头提供改进的下行轨迹性能。

    ATM header compression using hash tables
    40.
    发明授权
    ATM header compression using hash tables 有权
    使用哈希表的ATM头压缩

    公开(公告)号：US07720071B2

    公开(公告)日：2010-05-18

    申请号：US12042930

    申请日：2008-03-05

    申请人： Yan Wu ,  Song Bi ,  Timothy Bornemisza

    发明人： Yan Wu ,  Song Bi ,  Timothy Bornemisza

    IPC分类号： H04L12/28 ,  H04J3/24

    CPC分类号： H04L12/5601 ,  H04L2012/5652

    摘要： Disclosed are exemplary techniques for compressing ATM cells by substituting reduced headers for the original headers. A header table may be maintained at the transmitting end whereby headers are stored in table entries based on a table index generated from a hash function applied to the headers. A copy of the header table may be maintained at the receiving end and may be updated by populating idle cells with header table contents. Upon receipt of a reduced ATM cell at the receiving end, the reduced header may be replaced with a full header obtained from the copy of the header table maintained at the receiving end. The present invention further provides techniques for registration and management of hash collisions.

    摘要翻译： 公开了用于通过用缩小的报头代替原始报头来压缩ATM信元的示例性技术。 可以在发送端维护头表，由此基于从应用于报头的散列函数生成的表索引，将报头存储在表条目中。 标题表的副本可以在接收端保持，并且可以通过用标题表内容填充空闲小区来更新。 在接收端接收到减少的ATM信元时，可以用从保持在接收端的报头表的副本获得的全标头替换减少的报头。 本发明还提供了用于哈希冲突的注册和管理的技术。