Optical servo system for use with magnetic data storage tape having magnetic reference indicators
    12.
    发明授权
    Optical servo system for use with magnetic data storage tape having magnetic reference indicators 失效
    用于具有磁参考指示器的磁数据存储带的光伺服系统

    公开(公告)号:US06493174B1

    公开(公告)日:2002-12-10

    申请号:US09506174

    申请日:2000-02-17

    申请人: Daniel P. Stubbs

    发明人: Daniel P. Stubbs

    IPC分类号: G11B5584

    CPC分类号: G11B5/584

    摘要: Optical servo systems and magnetic data storage tape for use with magnetic data storage drives. The servo system utilizes a head mechanism that includes an optical head and a magnetic head. The optical head is adapted to detect a series of optical indicator marks located on a servo track on the tape. The magnetic head is adapted to detect one or a series of magnetic reference indicator marks located on a corresponding data track. The magnetic reference indicator marks are, in one embodiment, spaced periodically along the length of the tape. The magnetic reference indicator marks allow recalibration of the optical servo system by permitting the determination of any dimensional offset between the optical head and the magnetic head attributable to manufacturing tolerances or environmental factors. In one embodiment, a separate temperature sensor may be used to determine thermal changes in and around the head mechanism. Based on the temperature change measured, a special calibration algorithm may be invoked to recalibrate the distance between the optical head and the magnetic head.

    摘要翻译: 用于磁数据存储驱动器的光学伺服系统和磁性数据存储磁带。 伺服系统利用包括光头和磁头的头机构。 光头适于检测位于磁带上的伺服磁道上的一系列光学指示标记。 磁头适于检测位于相应的数据轨道上的一个或一系列磁性参考指示标记。 在一个实施例中,磁参考指示标记沿带的长度周期性地间隔开。 磁参考指示标记允许通过允许根据制造公差或环境因素来确定光学头和磁头之间的任何尺寸偏移来重新校准光学伺服系统。 在一个实施例中,可以使用单独的温度传感器来确定头部机构内部和周围的热变化。 基于测量的温度变化,可以调用特殊的校准算法来重新校准光头和磁头之间的距离。

    Process for plasma deposition of a carbon rich coating
    13.
    发明授权
    Process for plasma deposition of a carbon rich coating 失效
    用于等离子体沉积富碳涂层的方法

    公开(公告)号:US5286534A

    公开(公告)日:1994-02-15

    申请号:US40837

    申请日:1993-03-31

    摘要: The present invention provides a magnetic recording medium that includes a polymeric flexible substrate and a magnetic layer coating thereon, with a binderless carbon rich layer adhered to the magnetic layer.The present invention also provides a process for the plasma deposition of the carbon rich coating onto a magnetic medium comprising the steps of:a. providing a magnetic medium in a vacuum chamber;b. generating carbon rich plasma in the vacuum chamber by injecting a plasma gas suitable to provide a carbon rich coating into an elongated hollow cathode; and providing a sufficient voltage to create and maintain plasma; and maintaining a vacuum in the vacuum chamber sufficient for the plasma; andc. exposing the magnetic medium to the plasma while the magnetic medium is influenced by a radio frequency bias electrode to accelerate the plasma towards the magnetic medium and deposit the carbon rich coating on the magnetic medium.

    摘要翻译: 本发明提供一种磁记录介质,其包括聚合物柔性基底和其上的磁性层涂层,其中无粘结剂碳富集层粘附到磁性层。 本发明还提供了一种用于将富碳涂层等离子体沉积到磁性介质上的方法,包括以下步骤:a。 在真空室中提供磁介质; b。 通过将适合于将富碳涂层提供到细长空心阴极中的等离子体气体在真空室中产生富碳等离子体; 并提供足够的电压来产生和维持等离子体; 并且在真空室中保持足够的等离子体的真空; 和c。 将磁介质暴露于等离子体,同时磁介质受到射频偏置电极的影响,以将等离子体加速到磁介质,并将富碳涂层沉积在磁介质上。

    Narrow track resolution magneto-optic read head
    14.
    发明授权
    Narrow track resolution magneto-optic read head 失效
    窄轨分辨率磁光读头

    公开(公告)号:US06535351B1

    公开(公告)日:2003-03-18

    申请号:US09992175

    申请日:2001-11-14

    IPC分类号: G11B533

    CPC分类号: G11B11/10547

    摘要: In one embodiment, the invention is directed toward a magneto-optic read head formed to suppress magnetic exchange coupling at regular intervals along a lateral direction of the read head. For example, in the region of the magneto-optic read head where light is reflected, i.e., the optical scanning region, the read head may be formed with a series of ferromagnetic exchange breaks that reduce lateral permeability of magnetic fields, and hence reduce lateral flux through the read head. In this manner, the effective resolution of the read head can be increased, thereby facilitating readout of data stored on narrower data tracks.

    摘要翻译: 在一个实施例中,本发明涉及一种磁光读头,其形成为沿着读头的横向以规则的间隔抑制磁交换耦合。 例如,在光被反射的磁光读取头的区域(即光学扫描区域)中,读取头可以形成有一系列铁磁交换断裂,其减小磁场的横向磁导率,从而减小横向 磁通通过读头。 以这种方式,可以增加读取头的有效分辨率,从而便于读取存储在较窄数据轨道上的数据。