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    TIMING-BASED SERVO VERIFY HEAD AND METHOD THEREOF
    1.
    发明申请
    TIMING-BASED SERVO VERIFY HEAD AND METHOD THEREOF 审中-公开
    基于时序的伺服验证头及其方法

    公开(公告)号：US20070230040A1

    公开(公告)日：2007-10-04

    申请号：US11693489

    申请日：2007-03-29

    申请人： Matthew Dugas ,  Gregory Wagner

    发明人： Matthew Dugas ,  Gregory Wagner

    IPC分类号： G11B5/265

    CPC分类号： G11B5/265 ,  G11B5/584

    摘要： A servo head capable of verifying at least one timing based pattern printed on media is provided. The servo head includes a magnetic structure having at least one magnetic element arranged and configured to form at least one magnetic gap parallel to the timing based pattern. In one embodiment, the magnetic element is arranged and configured to have a plurality of magnetic gaps being parallel to each other but not co-linear to each other. In the second embodiment, the magnetic element is arranged and configured to have a magnetic gap being parallel to and co-linear to the timing based pattern.

    摘要翻译： 提供一种能够验证印刷在介质上的至少一个基于时序的图案的伺服头。 伺服磁头包括具有至少一个磁性元件的磁性结构，所述至少一个磁性元件被布置和配置成形成平行于基于时序的图案的至少一个磁隙。 在一个实施例中，磁性元件被布置和配置为具有彼此平行但不彼此共线的多个磁隙。 在第二实施例中，磁性元件被布置和配置为具有与基于时序的图案平行并且共线的磁隙。

    Wear pads for timing-based surface film servo heads
    2.
    发明申请
    Wear pads for timing-based surface film servo heads 失效

    公开(公告)号：US20060061906A1

    公开(公告)日：2006-03-23

    申请号：US11271394

    申请日：2005-11-10

    申请人： Matthew Dugas

    发明人： Matthew Dugas

    IPC分类号： G11B5/265 ,  G11B5/29

    CPC分类号： G11B5/1276 ,  G11B5/1877 ,  G11B5/29 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/4893 ,  G11B5/584 ,  Y10T29/49046 ,  Y10T29/49052

    摘要： A thin film magnetic recording head is provided with a tape bearing surface that has magnetically isolated channels while still providing a maximum continuous surface area with which to engage the media. This can be accomplished by providing spaces in the magnetically permeable thin film that are large enough to prevent cross-talk between the channels, but small enough to prevent significant interference with the moving media. Alternatively, magnetically impermeable thin film spacers can be provided to magnetically isolate each of the channels. The spacers are generally even with the magnetically permeable thin film so as to provide a continuous media-bearing surface.

    Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same
    3.
    发明申请
    Intergrated thin film subgap subpole structure for arbitrary gap pattern magnetic recording heads and method of making the same 失效
    用于任意间隙图案磁记录头的集成薄膜底隙子极结构及其制作方法

    公开(公告)号：US20050254170A1

    公开(公告)日：2005-11-17

    申请号：US11120640

    申请日：2005-05-03

    申请人： Matthew Dugas ,  Theodore Schwarz

    发明人： Matthew Dugas ,  Theodore Schwarz

    IPC分类号： G11B5/147 ,  G11B5/31 ,  G11B5/584

    CPC分类号： G11B5/3103 ,  G11B5/3163 ,  G11B5/3173 ,  G11B5/3179 ,  G11B5/3183 ,  G11B5/584

    摘要： An arbitrary gap thin film magnetic recording head is fabricated by forming a substrate based on traditional vertical planar thin film head wafer technology which is designed to produce an integrated subgap and subpole substrate structure. The wafer is then processed into row bars to reveal, in a plane parallel to the transducing direction of the medium, the subgap and subpoles at the surface of the row bar and to bring the structure to a certain coil depth or gap depth. A flat or cylindrical contour may be utilized. This thin film subgap row bar is taken through a film deposition or growth process that deposits the magnetic film on a plane perpendicular to the wafer plane, horizontal planar processing, forming a surface film recording head where an arbitrary gap structure can be made in-between the subpoles and generally directly on top of the subgap. The surface thin film is deposited and patterned on the tape bearing surface of the head to optimize various element configurations, gap patterns and head-to-tape medium contact. An arbitrary gap thin film magnetic recording head is manufactured using two major thin film processing planes, one orthogonal to the other, the first major plane is wafer level and the second major plane is sub-wafer level and perpendicular to the first. The first major plane of processing defines the magnetically active substrate including coils, subgap and subpole members. The second major plane of processing defines the surface film which transmits the flux from the subpoles to the gap features contained in the surface film. This resulting structure is a recording head that is wired to the servo system electronics and will format the tape with the arbitrary gap pattern.

    摘要翻译： 通过基于传统的垂直平面薄膜头晶片技术形成基板来制造任意的间隙薄膜磁记录头，该技术被设计成产生集成的子间隙和亚极基底结构。 然后将晶片加工成行条，以在平行于介质的转换方向的平面中显示在行条的表面处的子间隙和亚极，并使结构达到一定的线圈深度或间隙深度。 可以使用平坦或圆柱形的轮廓。 该薄膜底隙排条通过在垂直于晶片平面的平面上沉积磁膜的膜沉积或生长工艺，水平平面处理，形成表面胶片记录头，其中可以在其间形成任意间隙结构 子笔和通常直接在子间隙的顶部。 表面薄膜被沉积并图案化在头部的带状表面上，以优化各种元件构造，间隙图案和头对带介质接触。 使用两个主要的薄膜处理平面制造任意的间隙薄膜磁记录头，一个正交于另一个的第一主平面是晶片级，第二主平面是次晶片级并垂直于第一主平面。 第一主要处理平面定义了包括线圈，子间隙和子极构件的磁性活性衬底。 第二主要处理平面定义了将来自亚极的通量传递到包含在表面膜中的间隙特征的表面膜。 这种结构的结构是连接到伺服系统电子设备的记录头，并且将以任意的间隙图形来格式化磁带。

    LOW INDUCTANCE, FERRITE SUB-GAP SUBSTRATE STRUCTURE FOR SURFACE FILM MAGNETIC RECORDING HEADS
    4.
    发明申请
    LOW INDUCTANCE, FERRITE SUB-GAP SUBSTRATE STRUCTURE FOR SURFACE FILM MAGNETIC RECORDING HEADS 失效
    表面电磁记录头的低电感，铁素体基底层结构

    公开(公告)号：US20080024913A1

    公开(公告)日：2008-01-31

    申请号：US11842692

    申请日：2007-08-21

    申请人： Matthew Dugas

    发明人： Matthew Dugas

    IPC分类号： G11B5/265

    CPC分类号： G11B5/23 ,  G11B5/127 ,  G11B5/1276 ,  G11B5/193 ,  G11B5/232 ,  G11B5/235 ,  G11B5/29 ,  G11B5/295 ,  G11B5/3116 ,  G11B5/4893 ,  G11B5/584 ,  G11B20/1211 ,  G11B20/1217 ,  Y10T29/49055 ,  Y10T29/49057

    摘要： A thin film magnetic recording head is fabricated by forming a substrate from opposing ferrite blocks which have a ceramic member bonded between them. This structure is then diced to form a plurality of columns, wherein each column has a ferrite/ceramic combination. Each column represents a single channel in the completed head. A block of ceramic is then cut to match the columned structure and the two are bonded together. The bonded structure is then cut or ground until a head is formed, having ceramic disposed between each channel. A ferrite back-gap is then added to each channel, minimizing the reluctance of the flux path. The thin film is patterned on the head to optimize various channel configurations.

    摘要翻译： 通过从相对的铁素体块形成衬底来制造薄膜磁记录头，所述铁氧体块在它们之间具有陶瓷构件。 然后将该结构切成多个柱，其中每个柱具有铁素体/陶瓷组合。 每列表示完成的头中的单个通道。 然后切割一块陶瓷以匹配柱状结构，并将两个结合在一起。 然后将接合结构切割或研磨直到形成头部，其中陶瓷设置在每个通道之间。 然后将铁氧体背隙添加到每个通道，使磁通路径的磁阻最小化。 该薄膜在头部被图案化以优化各种通道配置。

    Stepped time based servo pattern and head
    9.
    发明申请
    Stepped time based servo pattern and head 失效
    基于步进时间的伺服模式和头

    公开(公告)号：US20050195525A1

    公开(公告)日：2005-09-08

    申请号：US11060627

    申请日：2005-02-17

    申请人： Matthew Dugas ,  Theodore Schwarz

    发明人： Matthew Dugas ,  Theodore Schwarz

    IPC分类号： G11B5/584

    CPC分类号： G11B5/584 ,  G11B5/59638

    摘要： The present invention relates to apparatuses and methods used in manufacturing magnetic tape. More specifically, the present invention relates to a method of writing a servo pattern on magnetic tape so as to minimize errors in the servo pattern, the heads used to write such servo data, and the magnetic tape manufactured with such heads. Errors in the servo pattern may be minimized by synthesizing the slanted transitions in a time based servo pattern using servo write gaps that are perpendicular to the tape motion. In so minimizing errors, distortion in the reading and/or writing of the data tracks can be prevented.

    摘要翻译： 本发明涉及用于制造磁带的装置和方法。 更具体地说，本发明涉及一种将伺服图形写在磁带上的方法，以便最小化伺服模式中的误差，用于写入这种伺服数据的磁头以及用这种磁头制造的磁带。 可以通过使用垂直于带运动的伺服写入间隙在基于时间的伺服模式中合成倾斜转变来最小化伺服模式中的错误。 在这样最小化误差的情况下，可以防止读取和/或写入数据轨道的失真。

    Apparatuses and methods for pre-erasing during manufacture of magnetic tape
    10.
    发明申请
    Apparatuses and methods for pre-erasing during manufacture of magnetic tape 失效
    在制造磁带期间预擦除的装置和方法

    公开(公告)号：US20050168869A1

    公开(公告)日：2005-08-04

    申请号：US10768719

    申请日：2004-01-30

    申请人： Matthew Dugas ,  Theodore Schwarz

    发明人： Matthew Dugas ,  Theodore Schwarz

    IPC分类号： G11B5/008 ,  G11B5/127

    CPC分类号： G11B5/00813

    摘要： The present invention relates to direct current (“DC”) pre-erasing servo channels of a magnetic tape prior to writing servo data in a servo channel. The present invention particularly relates to those servo recordings which were written with a uni-polar current waveform. The DC pre-erase is performed using a uni-polar direct current of a polarity that is opposite to the polarity of the direct current used to write the servo data. This pre-erase may be done with one or more heads. Also, as will be described, the pre-erase of a servo channel and writing to a servo channel may be done by making two passes over a single head or by using two or more heads to perform both steps. Also, it is within the scope of the present invention to have the heads mounted on a single mount or have the heads on separate mounts and on separate tape decks.

    摘要翻译： 本发明涉及在伺服信道中写入伺服数据之前磁带的直流（“DC”）预擦除伺服通道。 本发明特别涉及用单极电流波形写入的那些伺服记录。 使用与用于写入伺服数据的直流电的极性相反的极性的单极直流电进行直流预擦除。 这种预擦除可以用一个或多个头完成。 此外，如将要描述的那样，可以通过在单个头上进行两次通过或者通过使用两个或更多个头执行两个步骤来完成对伺服信道的预擦除和对伺服信道的写入。 此外，将头部安装在单个安装座上或将头部安装在单独的安装件上以及在单独的磁带机上也在本发明的范围内。