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    • 2. 发明申请
    • RECORDING/REPRODUCING APPARATUS AND METHOD OF MEASURING A PARAMETER
    • 记录/再现设备和测量参数的方法
    • US20070115580A1
    • 2007-05-24
    • US11557571
    • 2006-11-08
    • Makoto MORIYAKazuya SHIMAKAWAKuniyasu ITO
    • Makoto MORIYAKazuya SHIMAKAWAKuniyasu ITO
    • G11B5/596G11B21/02
    • G11B5/59627G11B5/5965
    • A recording/reproducing apparatus includes: a magnetic recording medium on which data track patterns are formed in data track pattern regions by a pattern with recording regions and non-recording regions and on which servo patterns are formed in servo pattern regions by the pattern; a recording head that writes signals on the medium; a reproducing head that reads signals written on the medium; and a control unit that controls the writing of signals by the recording head and the reading of signals by the reproducing head and measures a predetermined parameter for at least one of the recording head and the reproducing head by writing and reading measurement signals on the medium. The control unit writes the measurement signals using the recording head on first recording regions formed continuously in a radial direction of the medium out of the recording regions formed in the servo pattern regions, reads the measurement signals using the reproducing head, and measures the parameter based on the read measurement signals.
    • 记录/再现装置包括:磁记录介质,通过具有记录区域和非记录区域的图案在数据轨道图案区域中形成数据轨道图案,并且通过该图案在伺服图案区域中形成伺服图案; 在介质上写入信号的记录头; 读取写在介质上的信号的再现头; 以及控制单元,其通过记录头来控制信号的写入和由再现头读取信号,并且通过在介质上写入和读取测量信号来测量记录头和再现头中的至少一个的预定参数。 控制单元使用记录头将测量信号写入在形成在伺服模式区域中的记录区域中的在介质的径向方向上连续形成的第一记录区域上,使用再现头读取测量信号,并且测量基于参数的参数 对读取的测量信号。
    • 3. 发明申请
    • MAGNETIC RECORDING MEDIUM, RECORDING REPRODUCING APPARATUS, AND STAMPER
    • 磁记录介质,记录装置和印章
    • US20090185308A1
    • 2009-07-23
    • US12412600
    • 2009-03-27
    • Akimasa KAIZUYoshikazu SOENOMakoto MORIYA
    • Akimasa KAIZUYoshikazu SOENOMakoto MORIYA
    • G11B5/596G11B5/82B29C43/00
    • B82Y10/00G11B5/59655G11B5/743G11B5/865
    • On a magnetic recording medium, M sets of burst patterns are formed along a direction of rotation of a substrate in each burst pattern region, where M is a natural number of two or higher. Each burst pattern is formed so as to include two types of burst signal units that are positioned at different distances from a center of data track patterns and have an equal length along a radial direction of the substrate. The length along the radial direction is (2·M/N) times the track pitch, where N is a natural number of two or higher. In a predetermined range where both ends in the radial direction do not match a center in the radial direction of a burst pattern, (2·M) centers in the radial direction of the burst patterns are present at intervals of (1/N) times the track pitch in the radial direction, the two types of burst signal units are formed of recording regions and do not overlap each other in the direction of rotation, centers of the burst signal units in the radial direction are separated by (M/N) times the track pitch, and facing end parts in the radial direction of the burst signal units are separated via non-recording regions.
    • 在磁记录介质上,在每个突发图形区域中沿着衬底的旋转方向形成M组突发图案,其中M是两个或更高的自然数。 每个突发图案被形成为包括位于与数据轨迹图案的中心不同距离并且沿着基板的径向方向具有相等长度的两种类型的突发信号单元。 沿径向的长度为轨道间距的(2.M / N)倍,其中N为2或更高的自然数。 在径向两端不匹配突发图形的径向方向的中心的预定范围内,以(1 / N)倍的间隔以突发图案的径向方向为中心的(2.M) 轨道间距在径向方向上,两种类型的突发信号单元由记录区域形成,并且在旋转方向上彼此不重叠,所以突发信号单元的径向中心分开(M / N) 时间轨道间距,并且面对突发信号单元的径向方向上的端部部分经由非记录区域分离。
    • 5. 发明申请
    • MAGNETIC RECORDING MEDIUM, RECORDING/REPRODUCING APPARATUS, AND STAMPER
    • 磁记录介质,记录/再现设备和印章
    • US20090207522A1
    • 2009-08-20
    • US12433495
    • 2009-04-30
    • Akimasa KAIZUYoshikazu SOENOMakoto MORIYA
    • Akimasa KAIZUYoshikazu SOENOMakoto MORIYA
    • G11B5/596
    • G11B5/865B82Y10/00G11B5/59655G11B5/743G11B5/82
    • On a magnetic recording medium, M sets of burst patterns are formed along a direction of rotation of a substrate in each burst pattern region, where M is a natural number of two or higher. Each burst pattern is formed so as to include two types of burst signal units that are positioned at different distances from a center of data track patterns and have an equal length along a radial direction of the substrate. The length along the radial direction is (2·M/N) times the track pitch, where N is a natural number of two or higher. In a predetermined range where both ends in the radial direction do not match a center in the radial direction of a burst pattern, (2·M) centers in the radial direction of the burst patterns are present at intervals of (1/N) times the track pitch in the radial direction, the two types of burst signal units are formed of non-recording regions and do not overlap each other in the direction of rotation, centers of the burst signal units in the radial direction are separated by (M/N) times the track pitch, and facing end parts in the radial direction of the burst signal units are separated via recording regions.
    • 在磁记录介质上,在每个突发图形区域中沿着衬底的旋转方向形成M组突发图案,其中M是两个或更高的自然数。 每个突发图案被形成为包括位于与数据轨迹图案的中心不同距离并且沿着基板的径向方向具有相等长度的两种类型的突发信号单元。 沿径向的长度为轨道间距的(2.M / N)倍,其中N为2或更高的自然数。 在径向两端不匹配突发图形的径向方向的中心的预定范围内,以(1 / N)倍的间隔以突发图案的径向方向为中心的(2.M) 轨道间距在径向上,两种类型的突发信号单元由非记录区域形成,并且在旋转方向上不重叠,突发信号单元的径向中心分开(M / N)倍,并且面对突发信号单元的径向方向上的端部部分经由记录区域分离。
    • 6. 发明申请
    • RECORDING/REPRODUCING APPARATUS AND TRACKING SERVO CONTROL METHOD
    • 记录/再现设备和跟踪伺服控制方法
    • US20080304175A1
    • 2008-12-11
    • US12036367
    • 2008-02-25
    • Makoto MORIYAKazuya SHIMAKAWA
    • Makoto MORIYAKazuya SHIMAKAWA
    • G11B5/584
    • G11B5/59627
    • A recording/reproducing apparatus includes: a rotary-type magnetic recording medium including a track pattern with concentric or spiral data recording tracks; a composite magnetic head including a reproducing element that reads magnetic signals from the medium and a recording element that writes magnetic signals on the medium; a control unit that moves the magnetic head over the medium to carry out tracking servo control on the reproducing element or the recording element to keep the element on a desired track; and a storage unit that stores offset information that specifies offsets for calculating an adjustment used to adjust a head position of the magnetic head during tracking servo control. The stored offset information specifies at least two different offsets per revolution of the medium. During tracking servo control, the control unit changes the adjustment at least once per revolution of the medium in accordance with offsets specified based on the offset information.
    • 记录/再现装置包括:旋转式磁记录介质,包括具有同心或螺旋数据记录轨道的轨道图案; 包括从介质读取磁信号的再现元件和在介质上写入磁信号的记录元件的复合磁头; 控制单元,其使所述磁头移动到所述介质上,以对所述再现元件或所述记录元件执行跟踪伺服控制,以将所述元件保持在期望的轨道上; 以及存储单元,其存储指定用于计算用于在跟踪伺服控制期间调节磁头的位置的调整的偏移的偏移信息。 存储的偏移信息指定介质每转至少两个不同的偏移量。 在跟踪伺服控制期间,控制单元根据基于偏移信息指定的偏移量,每次旋转介质至少改变一次调整。