Magnetic head and magnetic disk drive
    51.
    发明授权
    Magnetic head and magnetic disk drive 失效
    磁头和磁盘驱动器

    公开(公告)号:US06795277B2

    公开(公告)日:2004-09-21

    申请号:US10067859

    申请日:2002-02-08

    IPC分类号: G11B5265

    摘要: Provided is a thin film single pole head for perpendicular magnetic recording, which has a structure offering a high formatted volume, easy servo, difficulty of influencing a recording pattern on a medium, and capability of shortening processing time. This thin film single pole head for perpendicular magnetic recording is formed on a reproducing head composed of a pair of shield layers formed on a substrate, and a reproducing element formed therebetween. A structure is provided, where an auxiliary pole is not disposed between the reproducing element of the reproducing head and the main pole of a recording head when seen from a surface facing to recording media.

    摘要翻译: 提供一种用于垂直磁记录的薄膜单极头,其具有提供高格式化体积,容易伺服,难以影响介质上的记录图案的结构以及缩短处理时间的能力的结构。 用于垂直磁记录的这种薄膜单极头形成在由形成在基板上的一对屏蔽层和由它们之间形成的再现元件构成的再现头上。 提供了一种结构,其中当从面向记录介质的表面看时,辅助极不设置在再现头的再现元件和记录头的主极之间。

    Magnetic disk apparatus with data track reassigning function
    53.
    发明授权
    Magnetic disk apparatus with data track reassigning function 有权
    具有数据轨迹重新分配功能的磁盘设备

    公开(公告)号:US06310741B1

    公开(公告)日:2001-10-30

    申请号:US09225972

    申请日:1999-01-05

    IPC分类号: G11B509

    CPC分类号: G11B19/04 G11B5/596

    摘要: When the amount of position error PE of a magnetic head meets the condition of Ewf>PE>=Eww for two threshold values Ewf and Eww meeting Ewf>Eww, the track is registered in the track information table as a track requiring rewrite and the tracks on both sides neighboring to the track are temporarily write-inhibited. The data of the track is rewritten on another track later so as to maintain the data. By doing this, the offtrack of the recording track can be made smaller without sacrifice of the access speed and the occurrence probability of write fault can be reduced. Furthermore, the reliability of a magnetic disk apparatus can be improved.

    摘要翻译: 当磁头的位置误差PE的数量满足Ewf> PE> = Eww的两个阈值Ewf和Eww满足Ewf> Eww的条件时,轨道被记录在轨道信息表中作为需要重写的轨道,并且轨道 在与轨道相邻的两侧临时禁止写入。 轨道的数据稍后被重写在另一个轨道上,以便保持数据。这样做,可以使得记录轨道的远距离更小,而不牺牲访问速度,并且可以减少写入故障的发生概率。 此外,可以提高磁盘装置的可靠性。

    Apparatus for recording/reproducing information data in two dimensional
format
    54.
    发明授权
    Apparatus for recording/reproducing information data in two dimensional format 失效
    用于以二维格式记录/再现信息数据的装置

    公开(公告)号:US5657308A

    公开(公告)日:1997-08-12

    申请号:US557319

    申请日:1995-11-14

    摘要: In an information recording/reproducing apparatus constructed of: a buffer for storing therein consecutive recording data in a unit of two dimensional conversion; a coding device for converting the consecutive recording data into a two-dimensional data arrangement arranged by "n" lines and "m" columns corresponding to said unit of data; a recording device for subdividing said two-dimensional data arrangement arranged by "n" lines and "m" columns so as to be read out, and for controlling "m" pieces of light sources in accordance with these data series; and an optical apparatus for converging luminous fluxes from said "m" pieces of light sources so as to form "m" pieces of spots on a disk plane, the recording data is recorded on the disk plane as an optically distringuishable pit group having two-dimensionally extended areas arranged by "n" lines and "m" columns. During a reproducing operation, the reflected light is detected by "m" pieces of detectors; "m" columns of one-dimensional data series are generated from the reflected light detected by these detectors in a generator; and also consecutive data is reproduced from the two dimensional data arranged by "n" lines and "m" columns in a decoder.

    摘要翻译: 一种信息记录/再现装置,由以下部分构成:用于以二维转换为单位在其中存储连续的记录数据的缓冲器; 编码装置,用于将连续的记录数据转换为由对应于所述数据单元的“n”行和“m”列排列的二维数据排列; 用于细分由“n”行和“m”列布置的所述二维数据排列以便被读出的记录装置,并且用于根据这些数据序列控制“m”个光源; 以及用于会聚来自所述“m”个光源的光通量以便在盘平面上形成“m”个点的光学装置,所述记录数据被记录在盘平面上,作为具有二维图形的光学可区分凹坑组, 由“n”行和“m”列排列的三维延伸区域。 在再现操作期间,由“m”个检测器检测反射光; 从发生器中由这些检测器检测到的反射光产生“m”列的一维数据序列; 并且从解码器中由“n”行和“m”列排列的二维数据再现连续的数据。

    Developer composition for lithographic printing plates
    55.
    发明授权
    Developer composition for lithographic printing plates 失效
    平版印刷版的显影剂组合物

    公开(公告)号:US4271261A

    公开(公告)日:1981-06-02

    申请号:US106010

    申请日:1979-12-21

    CPC分类号: G03F7/32

    摘要: A developer composition for a lithographic printing plate provided with a coated layer composed of a photosensitive polymer having in the main chain thereof groups of formula (I) ##STR1## wherein X and Y independently represent hydrogen, halogen, cyano or nitro, and n is an integer of 1 or 2, comprising ethylene glycol monophenyl ether and at least one acid selected from the group consisting of a mineral acid, an organic carboxylic acid and an organic sulfonic acid.

    摘要翻译: 一种用于平版印刷版的显影剂组合物,其具有由其主链中具有式(I)基团的光敏聚合物构成的涂层,