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1. 发明授权

US5940250A Disk drive head having a read wide/write narrow architecture 失效
标题翻译：具有读宽/写窄结构的磁盘驱动器头
公开(公告)号：US5940250A
公开(公告)日：1999-08-17
申请号：US955197
申请日：1997-10-21
申请人： Michael McNeil , Harlan Mathews
发明人： Michael McNeil , Harlan Mathews
IPC分类号： G11B5/012 , G11B5/024 , G11B5/23 , G11B5/265 , G11B5/31 , G11B5/39 , G11B5/48 , G11B5/55 , G11B21/00
CPC分类号： G11B5/3967 , G11B21/00 , G11B5/012 , G11B5/2651 , G11B5/3103 , G11B5/3116 , G11B5/3163 , G11B5/4886 , G11B5/024 , G11B5/23 , G11B5/313 , G11B5/553 , Y10T29/49044 , Y10T29/49046
摘要： A dual element head is provided that includes a read element and a separate write element, wherein the read width of the read element is greater than the write width of the write element. The head also includes an erase notch for creating an erase strip along the edge of data written by the write element during a write operation. The width of the erase strip is optimized so that undesired data on the track, that could otherwise be read by the wider read element during a subsequent read operation, is removed during the write operation.
摘要翻译：提供了一种双元件头，其包括读取元件和单独的写入元件，其中读取元件的读取宽度大于写入元件的写入宽度。磁头还包括擦除凹口，用于在写入操作期间沿由写入元件写入的数据的边缘创建擦除条带。擦除条的宽度被优化，使得在写入操作期间移除轨道上不期望的数据，否则可能在后续读取操作期间被更宽的读取元件读取。

2. 发明授权

US5495379A Erase bands for vertical recording 失效
标题翻译：擦除条带进行垂直录制
公开(公告)号：US5495379A
公开(公告)日：1996-02-27
申请号：US272111
申请日：1994-07-07
申请人： Michael McNeil , Harlan Mathews
发明人： Michael McNeil , Harlan Mathews
IPC分类号： G11B5/00 , G11B5/012 , G11B5/024 , G11B5/127 , G11B5/23
CPC分类号： G11B5/024 , G11B5/012 , G11B5/1278 , G11B2005/0029 , G11B5/23
摘要： A magnetic head that vertically records information on a disk and which creates erase bands between the disk tracks. The head has a single pole that has a pair of erase band segments which extend from a center pole section. When the head is writing information, the erase band segments create erase bands at the outer edges of the track by not fully magnetizing the disk and/or increasing the azimuth angle of the magnetized outer edges. The azimuth angle can be increased by constructing the outer segments of the pole to extend at an angle from the center pole section. The reduction in field strength in the outer track edges can be accomplished by making the outer pole segments thinner to cause a saturation of the outer magnetic field. The weaker, angled outer track portions do not generate a significant magnetic field in a head located on an adjacent track, thereby in effect creating erase bands in the disk.
摘要翻译：在磁盘上垂直记录信息并在磁盘轨道之间产生擦除带的磁头。磁头具有一个单极，其具有从中心极部分延伸的一对擦除带段。当磁头写入信息时，擦除带段通过不完全磁化磁盘和/或增加磁化的外边缘的方位角而在轨道的外边缘处产生擦除带。可以通过构造极的外部段从中心极部分以一定角度延伸来增加方位角。外轨道边缘的场强的减小可以通过使外极段更薄以使外磁场饱和来实现。较弱的成角度的外轨道部分在位于相邻轨道上的头部中不产生显着的磁场，从而实际上在盘中产生擦除带。

3. 发明授权

US06366417B1 Mr head read signal preconditioning circuitry 失效
标题翻译：头先生读信号预处理电路
公开(公告)号：US06366417B1
公开(公告)日：2002-04-02
申请号：US09078437
申请日：1998-05-13
申请人： Harlan Mathews , Michael McNeil , Roger G. Bailey
发明人： Harlan Mathews , Michael McNeil , Roger G. Bailey
IPC分类号： G11B509
CPC分类号： G11B20/10027 , G11B5/012 , G11B5/02 , G11B5/027 , G11B5/035 , G11B5/09 , G11B20/10009 , G11B20/10055 , G11B20/10203 , G11B20/10314 , G11B2005/001 , G11B2005/0016
摘要： The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head, in a magnetic data storage system. The circuitry processes the analog signal before the signal reaches the detector which converts the analog signal into a digital signal representative of the data originally stored on the magnetic medium. In one embodiment, the invention comprises circuitry for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.
摘要翻译：本发明涉及用于在磁数据存储系统中处理诸如由磁阻头产生的信号的模拟读信号的电路。在信号到达检测器之前，电路处理模拟信号，该检测器将模拟信号转换成代表原始存储在磁介质上的数据的数字信号。在一个实施例中，本发明包括用于均衡模拟读取信号中的正和负脉冲的振幅的电路。在另一个实施例中，本发明包括用于减少模拟读取信号的基线偏移的电路。本发明可以用于使用任何常规数据检测方法的磁数据存储系统。

4. 发明授权

US5671098A Adaptive preamplifier for resonance tuning useful in a disk drive 失效
标题翻译：用于谐振调谐的自适应前置放大器可用于磁盘驱动器
公开(公告)号：US5671098A
公开(公告)日：1997-09-23
申请号：US456680
申请日：1995-06-01
申请人： Harlan Mathews , Michael McNeil , Michael A. Blatchley
发明人： Harlan Mathews , Michael McNeil , Michael A. Blatchley
IPC分类号： G11B5/012 , G11B5/09 , G11B9/00 , G11B5/02
CPC分类号： G11B5/012 , G11B5/09 , G11B9/00
摘要： A resonant frequency control circuit communicates with a head of a disk drive and the preamplifier of a read channel. The resonant frequency control circuit is useful in achieving peaking of a readback signal generated by reading data from a magnetic disk. The read channel also includes an equalizer circuit for enhancing equalization of the readback signal. A controller communicates with the read channel and the resonant frequency control circuit for, in one embodiment, selectively adding capacitance to that capacitance which is present in the read element of the head and the preamplifier. By controlling the resonant frequency, this desired signal peaking can be achieved, which is related to the frequencies of the coded data on the disk.
摘要翻译：谐振频率控制电路与磁盘驱动器的磁头和读通道的前置放大器通信。谐振频率控制电路对于通过从磁盘读取数据而产生的回读信号达到峰值是有用的。读通道还包括用于增强回读信号的均衡的均衡器电路。控制器与读取通道和谐振频率控制电路通信，在一个实施例中，选择性地向存在于头部和前置放大器的读取元件中的电容增加电容。通过控制谐振频率，可以实现与磁盘上的编码数据的频率相关的期望的信号峰化。

5. 发明授权

US06094806A Method for fabricating a dual element head 失效
标题翻译：双元件头制造方法
公开(公告)号：US06094806A
公开(公告)日：2000-08-01
申请号：US236875
申请日：1999-01-26
申请人： Michael McNeil , Harlan Mathews
发明人： Michael McNeil , Harlan Mathews
IPC分类号： G11B5/012 , G11B5/024 , G11B5/23 , G11B5/265 , G11B5/31 , G11B5/39 , G11B5/48 , G11B5/55 , G11B21/00 , G11B5/42
CPC分类号： G11B5/3967 , G11B21/00 , G11B5/012 , G11B5/2651 , G11B5/3103 , G11B5/3116 , G11B5/3163 , G11B5/4886 , G11B5/024 , G11B5/23 , G11B5/313 , G11B5/553 , Y10T29/49044 , Y10T29/49046
摘要： A method for fabricating a dual element head is disclosed. One embodiment includes first depositing a first head element upon a substrate and second depositing a second head element upon the first head element. Each of the depositing steps includes a tolerance that is independent of the other. In the second depositing step, the functional width of the second head element (i.e., the write width if the second head element is a write element) is made wider than a desired functional width for the second head element. The second head element is then trimmed to substantially achieve the desired functional width while using a portion of the first head element as a reference to reduce errors associated with the independent nature of the first and second tolerances. For instance, the portion of the first head element used as a reference can be an edge of a magnetoresistive (MR) read element that defines the read width of the read element. Preferably, the trimming step includes creating erase notches on a portion of the write element that are capable of erasing data from a recording medium. Thereafter, second notches that are deeper than the erase notches and hence less capable of erasing data than the erase notches are created next to the erase notches to adjust the width of the erase notches. It is also preferred that the first head element and the second head element include an air bearing surface that resides substantially in the x-z plane, and that the second head element is trimmed by a focussed ion beam from a direction that includes a y-component to adjust the width of the second head element in the z-direction.
摘要翻译：公开了一种用于制造双元件头的方法。一个实施例包括首先将第一头部元件沉积在基底上，并且将第二头部元件第二沉积在第一头部元件上。每个沉积步骤包括独立于另一个的公差。在第二沉积步骤中，使得第二头元件的功能宽度（即，如果第二头元件是写元件的写入宽度）比第二头元件的期望功能宽度宽。然后修剪第二头元件以基本上实现期望的功能宽度，同时使用第一头元件的一部分作为参考，以减少与第一和第二公差的独立性质相关联的误差。例如，用作参考的第一头元件的部分可以是限定读取元件的读宽度的磁阻（MR）读取元件的边缘。优选地，修剪步骤包括在写入元件的能够从记录介质擦除数据的部分上产生擦除陷波。此后，在擦除凹口旁边创建比擦除凹口更深的第二凹口，因此比擦除凹口更少能够擦除数据，以调整擦除凹口的宽度。还优选的是，第一头元件和第二头元件包括基本上位于xz平面中的空气支承表面，并且第二头元件由聚焦离子束从包括y分量的方向修剪到调整第二头元件在z方向上的宽度。

6. 发明授权

US5943177A MR head read signal preconditioning circuitry for reducing pulse -to-pulse baseline distortion 失效
标题翻译：用于减少脉冲到脉冲基线失真的MR头读信号预处理电路
公开(公告)号：US5943177A
公开(公告)日：1999-08-24
申请号：US451489
申请日：1995-05-26
申请人： Harlan Mathews , Michael McNeil , Roger G. Bailey
发明人： Harlan Mathews , Michael McNeil , Roger G. Bailey
IPC分类号： G11B5/00 , G11B5/012 , G11B5/02 , G11B5/027 , G11B5/035 , G11B5/09 , G11B20/10 , G11B5/35
CPC分类号： G11B20/10027 , G11B20/10009 , G11B20/10055 , G11B20/10314 , G11B5/012 , G11B5/02 , G11B5/027 , G11B5/035 , G11B5/09 , G11B20/10203 , G11B2005/001 , G11B2005/0016
摘要： The present invention relates to circuitry for processing an analog read signal, such as a signal produced by a magnetoresistive head, in a magnetic data storage system. The circuitry processes the analog signal before the signal reaches the detector which converts the analog signal into a digital signal representative of the data originally stored on the magnetic medium. In one embodiment, the invention comprises circuitry for equalizing the amplitudes of the positive and negative pulses in the analog read signal. In another embodiment, the invention comprises circuitry for reducing the baseline shift of the analog read signal. The invention may be used in magnetic data storage systems using any conventional data detection method.
摘要翻译：本发明涉及用于在磁数据存储系统中处理诸如由磁阻头产生的信号的模拟读信号的电路。在信号到达检测器之前，电路处理模拟信号，该检测器将模拟信号转换成代表原始存储在磁介质上的数据的数字信号。在一个实施例中，本发明包括用于均衡模拟读取信号中的正和负脉冲的振幅的电路。在另一个实施例中，本发明包括用于减少模拟读取信号的基线偏移的电路。本发明可以用于使用任何常规数据检测方法的磁数据存储系统。

7. 发明授权

US5978168A MR head differential micro-jog 失效
标题翻译： MR头差动微动
公开(公告)号：US5978168A
公开(公告)日：1999-11-02
申请号：US798606
申请日：1997-02-11
申请人： Harlan Mathews , James A. Valent
发明人： Harlan Mathews , James A. Valent
IPC分类号： G11B5/39 , G11B5/48 , G11B5/55 , G11B5/596 , G11B21/10
CPC分类号： G11B5/59627 , G11B5/4886 , G11B5/5526 , G11B5/5534 , G11B5/5965 , G11B5/3967 , G11B5/5547
摘要： A head positioning system accurately positions a read/write head along a selected track of a rotating magnetic disk. In one aspect, servo information is embedded along the track with the centerline of the servo information offset a radial distance from the centerline of data stored or written along the track. The head positioning system micro-jogs the read/write head a first and a second radial distance from the centerline of servo information for a read operation and a write operation.
摘要翻译：头部定位系统沿着选定的旋转磁盘的轨道精确地定位读/写头。在一个方面，沿轨道嵌入伺服信息，其中伺服信息的中心线抵消沿着轨道存储或写入的数据的中心线的径向距离。磁头定位系统从读取操作和写入操作的伺服信息的中心线向读/写头微步进第一和第二径向距离。

8. 发明授权

US5687046A Vertical recording using a tri-pad head 失效
标题翻译：使用三焊头进行垂直记录
公开(公告)号：US5687046A
公开(公告)日：1997-11-11
申请号：US565642
申请日：1995-11-29
申请人： Harlan Mathews
发明人： Harlan Mathews
IPC分类号： G11B5/012 , G11B5/127 , G11B5/48 , G11B5/60 , G11B5/147
CPC分类号： G11B5/6005 , G11B5/012 , G11B5/1278 , G11B5/4886
摘要： A vertical recording head structure combines a tri-pad shaped slider body with a uniquely shaped thin-film recording element disposed along a trailing edge of the slider body. The recording element, or transducer, includes a narrow probe tip for writing data to a rotating magnetic disk. The recording element also includes a wide permalloy area to distribute the magnetic field returning from the disk. The wide area spreads the magnetic field lines such that the returning flux is kept from unintentional writing or reading information. The size and orientation of the air-bearing surfaces on the tri-pad slider body causes the slider to assume a flying attitude wherein the leading edge is lifted above the rotating magnetic disk, and the trailing edge is in substantial contact with the disk, during data transfer operations.
摘要翻译：垂直记录头结构将三垫片状滑动体与沿滑块体的后缘设置的独特形状的薄膜记录元件结合。记录元件或换能器包括用于将数据写入旋转磁盘的窄探针尖端。记录元件还包括用于分配从盘返回的磁场的宽坡莫合金区域。广域扩展磁场线，使得返回磁通不会意外写入或读取信息。三垫片滑块体上的空气轴承表面的尺寸和方向使得滑块呈现飞行姿态，其中前缘被提升到旋转磁盘上方，并且后缘与盘基本上接触，在数据传输操作。

9. 发明授权

US5495368A Method of tracking thresholds on a read signal 失效
标题翻译：跟踪读取信号上的阈值的方法
公开(公告)号：US5495368A
公开(公告)日：1996-02-27
申请号：US58288
申请日：1993-05-04
申请人： Michael A. Blatchley , Charlie M. Monroe, Jr. , Harlan Mathews
发明人： Michael A. Blatchley , Charlie M. Monroe, Jr. , Harlan Mathews
IPC分类号： G11B20/10 , G11B5/09
CPC分类号： G11B20/10009
摘要： A pulse detection sensing system which provides an output signal only when a maximum voltage peak is detected. The system has a comparator which generates a comparator output signal when an output signal generated by the transducer of the system is equal to or greater than a threshold signal. The comparator is coupled to a peak follower and a sample/hold circuit which increases the voltage of the threshold signal to the level of the head output signal when the output signal attains a zero slope and has equaled or exceeded the set threshold value.
摘要翻译：脉冲检测传感系统，仅在检测到最大电压峰值时提供输出信号。当系统的换能器产生的输出信号等于或大于阈值信号时，该系统具有比较器，该比较器产生比较器输出信号。比较器耦合到峰值跟随器和采样/保持电路，当输出信号达到零斜率并且已经等于或超过设定的阈值时，该阈值信号的电压将增加到头部输出信号的电平。

10. 发明授权

US6067205A Positioning system for accurately positioning a read/write head over a track 失效
标题翻译：定位系统，用于将读/写头准确地定位在轨道上
公开(公告)号：US6067205A
公开(公告)日：2000-05-23
申请号：US273632
申请日：1999-03-23
申请人： Harlan Mathews , James A. Valent
发明人： Harlan Mathews , James A. Valent
IPC分类号： G11B5/39 , G11B5/48 , G11B5/55 , G11B5/596 , G11B21/10
CPC分类号： G11B5/59627 , G11B5/4886 , G11B5/5526 , G11B5/5534 , G11B5/5965 , G11B5/3967 , G11B5/5547
摘要： A head positioning system accurately positions a read/write head along a selected track of a rotating magnetic disk. In one aspect, servo information is embedded along the track with the centerline of the servo information offset a radial distance from the centerline of data stored or written along the track. The head positioning system micro-jogs the read/write head a first and a second radial distance from the centerline of servo information for a read operation and a write operation.
摘要翻译：头部定位系统沿着选定的旋转磁盘的轨道精确地定位读/写头。在一个方面，沿轨道嵌入伺服信息，其中伺服信息的中心线抵消沿着轨道存储或写入的数据的中心线的径向距离。磁头定位系统从读取操作和写入操作的伺服信息的中心线向读/写头微步进第一和第二径向距离。

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