公开(公告)号：US08091210B1

公开(公告)日：2012-01-10

申请号：US12042982

申请日：2008-03-05

申请人： Keith Y. Sasaki ,  Christopher T. Ngo

发明人： Keith Y. Sasaki ,  Christopher T. Ngo

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/1278 ,  G11B5/3116 ,  G11B5/3163 ,  Y10T29/49041 ,  Y10T29/49044 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method provides a structure in a magnetic recording transducer. The structure resides on an underlayer. The method includes providing a protective layer and providing layer(s) for the structure. The protective layer covers a field region but exposes a device region in which the structure is to reside. A first portion of the layer(s) reside in the device region, while a second portion of the layer(s) reside in the field region. The method also includes removing the second portion of the layer(s) using an over-removal condition. The underlayer is covered by a remaining portion of the protective layer after the removing step is completed. The method also includes removing the remaining portion of the protective layer. An underlayer removal rate is substantially less than a protective layer during the step of removing of the protective layer.

摘要翻译： 一种方法提供磁记录换能器中的结构。 结构位于底层上。 该方法包括提供保护层并为该结构提供层。 保护层覆盖场区域，但暴露其中结构所在的设备区域。 层的第一部分驻留在设备区域中，而层的第二部分驻留在场区域中。 该方法还包括使用过度去除条件去除层的第二部分。 在去除步骤完成之后，底层被保护层的剩余部分覆盖。 该方法还包括去除保护层的剩余部分。 在去除保护层的步骤期间，底层去除速率基本上小于保护层。

公开(公告)号：US07493688B1

公开(公告)日：2009-02-24

申请号：US11352536

申请日：2006-02-13

申请人： Lei Wang ,  Liping Ren ,  Yingjian Chen ,  Christopher T. Ngo ,  Ming Zhao

发明人： Lei Wang ,  Liping Ren ,  Yingjian Chen ,  Christopher T. Ngo ,  Ming Zhao

IPC分类号： G11B5/127 ,  H04R31/00

CPC分类号： G11B5/3163 ,  G11B5/3116 ,  Y10T29/49041 ,  Y10T29/49043 ,  Y10T29/49046 ,  Y10T29/49048 ,  Y10T29/49052

摘要： A method for providing a magnetic recording transducer is disclosed. The method includes providing a first pole having front and rear portions and a back gap on the rear portion. The method also includes providing an insulator on the first pole. The method includes providing a write gap and providing a portion of a second pole on at least the write gap. A portion of the write gap resides on the front portion of the first pole. A portion of the insulator covers a portion of the first pole between the portion of the second pole and the back gap. The method also includes providing a mask that covers the back gap and exposes the portion of the second pole and the insulator. The method also includes performing a pole trim that can substantially remove the portion of the insulator covering the remaining portion of the first pole.

摘要翻译： 公开了一种用于提供磁记录换能器的方法。 该方法包括提供具有前部和后部的第一极和后部上的后部间隙。 该方法还包括在第一极上提供绝缘体。 所述方法包括提供写入间隙并且在至少所述写入间隙上提供第二极点的一部分。 写入间隙的一部分位于第一极的前部。 绝缘体的一部分覆盖第二极的部分和后间隙之间的第一极的一部分。 该方法还包括提供覆盖后隙并且暴露第二极和绝缘体的部分的掩模。 该方法还包括执行极性修剪，其可以基本上去除覆盖第一极的剩余部分的绝缘体的部分。

公开(公告)号：US20120303836A1

公开(公告)日：2012-11-29

申请号：US13478254

申请日：2012-05-23

申请人： Christopher T. Ngo ,  Alexander W. Hietala

发明人： Christopher T. Ngo ,  Alexander W. Hietala

IPC分类号： G06F3/00

CPC分类号： G06F13/4247 ,  G06F2213/0052

摘要： Disclosed is a method in which slaves are cascaded on a bus, and cascading slave-to-slave communication is used to prioritize (or sequence) the software slave ID programming, enabling users to uniquely identify identical components in a circuit. In one embodiment, the first slave in the cascade stalls the programming of other slaves until the first slave's programming is complete. Once completed, the first slave then enables programming of the second slave, and so on. This embodiment allows multiple placements of identical slaves on the bus, and provides a method to uniquely identify and control each slave by using cascading software slave ID programming. In another embodiment, a structure with a similar effect may be created by lack of enablement (instead of disablement), wherein initially only the first slave is enabled, and subsequent slaves are not initially enabled. Additionally, the present disclosure is compatible with the MIPI RFFE standard interface.

摘要翻译： 公开了一种方法，其中从站在总线上级联，并且级联从站到从站通信用于对软件从站ID编程进行优先级排序（或顺序），使用户能够唯一地识别电路中的相同组件。 在一个实施例中，级联中的第一从机停止其他从机的编程，直到第一从机的编程完成。 一旦完成，第一个从站就可以对第二个从站进行编程，依此类推。 该实施例允许总线上相同从站的多个放置，并且提供通过使用级联软件从属ID编程唯一地识别和控制每个从设备的方法。 在另一个实施例中，具有相似效果的结构可能由于缺少启用（而不是禁用）而产生，其中最初只有第一从属被启用，并且后续的从设备最初不被启用。 另外，本公开与MIPI RFFE标准接口兼容。

公开(公告)号：US07911735B1

公开(公告)日：2011-03-22

申请号：US11716346

申请日：2007-03-09

申请人： Kyusik Sin ,  Mun Hyoun Park ,  Honglin Zhu ,  Christopher T. Ngo

发明人： Kyusik Sin ,  Mun Hyoun Park ,  Honglin Zhu ,  Christopher T. Ngo

IPC分类号： G11B5/147 ,  H04R31/00

CPC分类号： G11B5/3163 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/3133 ,  Y10T29/49041

摘要： The method and system for providing a perpendicular magnetic recording (PMR) head are described. The PMR head includes a base layer, a nonmagnetic metal underlayer on the base layer, and a PMR pole on the nonmagnetic metal underlayer. The PMR pole has a top that is wider than its bottom. The base layer has a first hardness with respect to a pole trim. The nonmagnetic metal underlayer has a second hardness with respect to the pole trim. The second hardness is less than the first hardness.

摘要翻译： 描述了用于提供垂直磁记录（PMR）头的方法和系统。 PMR头包括基底层，基底层上的非磁性金属底层和非磁性金属底层上的PMR极。 PMR杆具有比底部更宽的顶部。 基底层具有相对于极修剪的第一硬度。 非磁性金属底层相对于磁极修整具有第二硬度。 第二硬度小于第一硬度。

公开(公告)号：US09166471B1

公开(公告)日：2015-10-20

申请号：US12723738

申请日：2010-03-15

申请人： Chris Levesque ,  James Retz ,  Christopher T. Ngo

发明人： Chris Levesque ,  James Retz ,  Christopher T. Ngo

IPC分类号： H02M1/44 ,  H02M3/157 ,  H03K7/08

CPC分类号： H02M1/44 ,  H02M3/157 ,  H03K7/08

摘要： A circuit and method is disclosed that dithers a switching frequency of a DC-to-DC converter which gets modulated onto an RF carrier such that switching noise is spread over a given bandwidth that is wider than a communications measurements bandwidth. The circuit includes a switching circuitry adapted to transfer energy from a source to a load using a switching signal having a series of switching cycles and a switching frequency. Also included is a control circuitry adapted to generate a pseudo-random value near a beginning of each of the series of switching cycles to determine a maximum switching frequency value based upon the pseudo-random value. The method includes adjusting the switching frequency of the switching signal incrementally from a fixed minimum switching frequency value to the maximum frequency value and vice versa as a function of time during each of the series of switching cycles of the switching circuit.

摘要翻译： 公开了一种电路和方法，其将调制到RF载波上的DC-DC转换器的开关频率抖动，使得开关噪声在比通信测量带宽宽的给定带宽上扩展。 电路包括适于使用具有一系列开关周期和开关频率的开关信号将能量从源传输到负载的开关电路。 还包括一种控制电路，其适于在所述一系列切换周期中的每一个的开始附近产生伪随机值，以基于所述伪随机值来确定最大开关频率值。 该方法包括在开关电路的每个开关周期的每一个期间随着时间的推移将开关信号的开关频率从固定的最小开关频率值逐渐调整到最大频率值，反之亦然。