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1. 发明授权

US07443625B2 Magnetic disk drive 有权
标题翻译：磁盘驱动器
公开(公告)号：US07443625B2
公开(公告)日：2008-10-28
申请号：US11404780
申请日：2006-04-17
申请人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
发明人： Takehiko Hamaguchi , Atsushi Nakamura , Yasutaka Nishida , Hisashi Takano , Yohji Maruyama , Hiroshi Ide , Hideki Sawaguchi , Futoshi Tomiyama
IPC分类号： G11B5/02
CPC分类号： G11B5/012 , G11B5/4886 , G11B27/02
摘要： In the present invention, by making the width of the write element larger than the track pitch and securing a write magnetic field strong enough to reverse the magnetization of the magnetic layer, and further by writing while shifting a write head comprising the write element, a magnetic disk drive, of which the track width is narrower than the write element width, and the storage capacity is large, is realized.
摘要翻译：在本发明中，通过使写入元件的宽度大于轨道间距，并且确保写入磁场足够强以反转磁性层的磁化，并且进一步通过在包括写入元件的写入头的移位的同时进行写入，磁盘驱动器，其轨道宽度比写入元件宽度窄，并且存储容量大。

2. 发明授权

US07430085B2 Disk device and method of generating signal representing head 有权
标题翻译：磁盘装置和产生信号的方法
公开(公告)号：US07430085B2
公开(公告)日：2008-09-30
申请号：US11507436
申请日：2006-08-22
申请人： Motoyasu Tsunoda , Yukie Miyazawa, legal representative , Hitoshi Ogawa , Ryutaro Horita , Takashi Nara , Masatoshi Nishina , Katsumi Yamamoto
发明人： Shoichi Miyazawa
IPC分类号： G11B5/09
CPC分类号： G11B20/1217 , G11B5/59605 , G11B20/24 , G11B21/106 , G11B2020/1287 , G11B2020/1298
摘要： A signal processing device having a feature of analog-to-digital converting a burst signal has a feature of selecting data bus to notify a disk control device 2 of a conversion result via an NRZ data bus. The disk control device 2 includes means for storing the result of the analog-to-digital conversion of said servo positional signal. The positional signal of a head of the disk device is digitalized in an R/W channel. Sampling for digital conversion is performed in only a window which is defined only in the vicinity of peaks of the positional signal. The values of peaks which are obtained by sampling are averaged by an averaging circuit. This enables the influence of noise occurred outside of the window to be eliminated. Although the noise in the window is sampled, its adverse influence is suppressed by the averaging processing.
摘要翻译：具有模数转换突发信号特征的信号处理装置具有通过NRZ数据总线选择数据总线以向盘控制装置2通知转换结果的特征。磁盘控制装置2包括用于存储所述伺服位置信号的模数转换结果的装置。磁盘设备的磁头的位置信号在R / W通道中被数字化。仅在仅在位置信号的峰值附近定义的窗口中执行用于数字转换的采样。通过采样获得的峰值由平均电路进行平均。这使得可以消除在窗外发生的噪声的影响。虽然窗口中的噪声被采样，但其不利影响被平均处理抑制。

3. 发明授权

US07261958B2 Magnetic recording medium and magnetic recording system using the same 失效
标题翻译：磁记录介质和使用磁记录系统的磁记录系统
公开(公告)号：US07261958B2
公开(公告)日：2007-08-28
申请号：US10067333
申请日：2002-02-07
申请人： Yoshiyuki Hirayama , Hiroyuki Suzuki , Hiroyuki Kataoka , Yotsuo Yahisa , Tetsuya Kanbe
发明人： Yoshiyuki Hirayama , Hiroyuki Suzuki , Hiroyuki Kataoka , Yotsuo Yahisa , Tetsuya Kanbe
IPC分类号： G11B5/66 , G11B5/70
CPC分类号： G11B5/66 , G11B5/00 , G11B5/012 , G11B2005/0002 , G11B2005/0016
摘要： A magnetic recording medium having at least two magnetic layers and a non-magnetic intermediate layer held between them. The first magnetic layer (which is closer to the substrate than the non-magnetic intermediate layer) is formed from an alloy composed of Co, Pr, and Cr, with Pt content being 3-9 at %. The second magnetic layer (which is farther from the substrate than the non-magnetic intermediate layer) is formed from a Co-based alloy containing Pt, Cr, and B. The first and second magnetic layers are magnetized in the mutually antiparallel direction in the absence of an applied magnetic field.The magnetic recording medium is characterized by good thermal stability for recording bits, high recording resolution, and low media noise. It is suitable for a magnetic storage for high recording density with high reliability.
摘要翻译：具有至少两个磁性层和保持在它们之间的非磁性中间层的磁记录介质。第一磁性层（其比非磁性中间层更靠近基板）由Co，Pr和Cr组成的合金形成，Pt含量为3-9原子％。第二磁性层（其比非磁性中间层离基板更远）由含有Pt，Cr和B的Co基合金形成。第一和第二磁性层在相互反平行的方向上被磁化不存在施加的磁场。磁记录介质的特征在于用于记录位的良好热稳定性，高记录分辨率和低介质噪声。适用于具有高可靠性的高记录密度的磁存储。

4. 发明申请

US20070153418A1 Magnetic recording head and fabrication process 审中-公开
公开(公告)号：US20070153418A1
公开(公告)日：2007-07-05
申请号：US11714105
申请日：2007-03-06
申请人： Hisashi Kimura , Moriaki Fuyama
发明人： Hisashi Kimura , Moriaki Fuyama
IPC分类号： G11B5/127
CPC分类号： G11B5/1278 , G11B5/1871 , G11B5/3116 , G11B5/3163 , G11B5/40 , Y10T29/49032
摘要： Disclosed are a thin-film magnetic recording head suitable for high density recording and its fabrication method elaborated to avoid corrosion of the main pole section of the head. A non-magnetic metal layer is formed on the top of the main pole.

5. 发明授权

US07221530B2 Magnetic head with high reliability of the data protection, magnetic disk apparatus including the magnetic head and the method of recording information on the magnetic disk apparatus without miserasing the previously recorded data 失效
标题翻译：具有数据保护的高可靠性的磁头，包括磁头的磁盘装置以及在磁盘装置上记录信息的方法，而不会损失先前记录的数据
公开(公告)号：US07221530B2
公开(公告)日：2007-05-22
申请号：US11245168
申请日：2005-10-07
申请人： Futoshi Tomiyama , Takehiko Hamaguchi , Miki Hara , Fumiko Akagi , Yasutaka Nishida
发明人： Futoshi Tomiyama , Takehiko Hamaguchi , Miki Hara , Fumiko Akagi , Yasutaka Nishida
IPC分类号： G11B5/02
CPC分类号： G11B5/1278 , G11B5/012 , G11B5/02 , G11B5/3116 , G11B5/313 , G11B5/4886
摘要： There are provided a magnetic head and a magnetic disk apparatus wherein an upper magnetic pole is so shaped that, at a position where skew angle is maximum, the maximum of its projected length in the radial direction of a magnetic disk is not more than the track pitch of the magnetic disk, whereby acceleration of thermal relaxation of information recorded on adjacent tracks is obviated even in an area where the skew angle is large.
摘要翻译：提供了一种磁头和磁盘装置，其中上磁极的形状使得在歪斜角最大的位置处，其磁盘的径向上的突出长度的最大值不大于磁道即使在歪斜角较大的区域中也能消除记录在相邻轨道上的信息的热松弛的加速度。

6. 发明授权

US07217467B2 Perpendicular magnetic recording medium and magnetic recording/reproducing apparatus 失效
标题翻译：垂直磁记录介质和磁记录/再现装置
公开(公告)号：US07217467B2
公开(公告)日：2007-05-15
申请号：US10699737
申请日：2003-11-04
申请人： Reiko Arai , Kiwamu Tanahashi , Atsushi Kikugawa
发明人： Reiko Arai , Kiwamu Tanahashi , Atsushi Kikugawa
IPC分类号： G11B5/667 , G11B5/673
CPC分类号： G11B5/732 , G11B5/667 , G11B2005/0029
摘要： A magnetic recording/reproducing apparatus is disclosed with high storage capability. The apparatus also prevents fluctuation of readback output and decay of magnetization or erasure of recorded magnetization in the recording layer. A soft magnetic underlayer and a perpendicular recording layer are formed in specific order on the substrate of a magnetic disk. The soft magnetic underlayer has a triple-layered structure in which a domain control layer, including an anti-ferromagnetic layer, is sandwiched between two first and second soft magnetic layers. The thickness of the first and second soft magnetic layers (d1, d2) is between 25 nm and 150 nm and a ratio of d1/d2 is within a range of 0.3 to 1.5. Accordingly, magnetic domains in the soft magnetic underlayer of a perpendicular magnetic recording medium can be controlled and magnetic domain wall motion can be inhibited.
摘要翻译：公开了具有高存储能力的磁记录/重放装置。该装置还防止记录层中的回读输出波动和磁化衰减或记录磁化的擦除。在磁盘的基板上以特定顺序形成软磁性底层和垂直记录层。软磁性底层具有三层结构，其中包括反铁磁层的域控制层夹在两个第一和第二软磁层之间。第一和第二软磁性层（d 1，d 2）的厚度为25nm〜150nm，d 1 / d 2的比例为0.3〜1.5。因此，可以控制垂直磁记录介质的软磁性底层中的磁畴，并且可以抑制磁畴壁运动。

7. 发明授权

US07209309B2 Magnetic disk apparatus and method of controlling the same 有权
标题翻译：磁盘装置及其控制方法
公开(公告)号：US07209309B2
公开(公告)日：2007-04-24
申请号：US10920343
申请日：2004-08-18
申请人： Masayuki Kurita , Masaaki Matsumoto , Yuuichi Ootani , Yoshihiko Miyake , Shinsuke Higuchi , Hideaki Tanaka , Junguo Xu
发明人： Masayuki Kurita , Masaaki Matsumoto , Yuuichi Ootani , Yoshihiko Miyake , Shinsuke Higuchi , Hideaki Tanaka , Junguo Xu
IPC分类号： G11B21/02 , G11B21/24 , G11B5/596
CPC分类号： G11B21/21 , G11B5/4886 , G11B5/54 , G11B5/56 , G11B5/581 , G11B5/6005
摘要： A magnetic disk apparatus includes a rotation mechanism for driving a magnetic disk, a magnetic head slider being floated in close proximity to a surface of the magnetic disk, a recording/reproduction element for performing recording and playback of information, a drive unit for causing a distance between the record/reproduction element and the magnetic disk to change, and an arrangement to effect position determination of the magnetic head slider, wherein the apparatus has a detection unit for permitting the drive unit to gradually reduce the distance between the record/reproduction element and the magnetic disk and for detecting occurrence of contact therebetween, and a control unit for controlling the drive unit in such a way as to cause, the record/reproduction element to shift in position by a fixed amount to thereby let the distance between this element and magnetic disk increase accordingly.
摘要翻译：磁盘装置包括用于驱动磁盘的旋转机构，与磁盘表面相邻浮动的磁头滑块，用于执行信息的记录和重放的记录/再现元件，用于使记录/再现元件与磁盘之间的距离改变，以及用于实现磁头滑动器的位置确定的装置，其中该装置具有用于允许驱动单元逐渐减小记录/再现元件之间的距离的检测单元和磁盘，用于检测它们之间的接触的发生;以及控制单元，用于控制驱动单元，使得记录/再现元件在位置上移动固定的量，从而使该元件之间的距离磁盘也相应增加。

8. 发明授权

US07182974B2 Magnetic recording medium and its manufacturing method and magnetic recording system using such a magnetic recording medium 失效
标题翻译：磁记录介质及其制造方法以及使用这种磁记录介质的磁记录系统
公开(公告)号：US07182974B2
公开(公告)日：2007-02-27
申请号：US10774371
申请日：2004-02-10
申请人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
发明人： Yoshio Takahashi , Kiwamu Tanahashi , Yuzuru Hosoe , Ichiro Tamai
IPC分类号： B05D5/12
CPC分类号： G11B5/64 , G11B5/66 , G11B5/84 , Y10T428/12465 , Y10T428/12875 , Y10T428/31
摘要： A magnetic recording medium having a high coercive force and being capable of high-density writing/reading has a substrate, a soft magnetic layer, a non-magnetic intermediate layer, a magnetic layer, a protective layer, and a lubricating layer. The magnetic layer is characterized by stacking fault density and dispersion of particle diameters. The stacking fault density should preferably be no larger than 0.05, and the dispersion of particle diameters should preferably be no larger than 0.4. The magnetic recording medium has a coercive force larger than 4000 Oe, is highly stable to thermal decay, and has a recording density in excess of 50 Gbit/in2.
摘要翻译：具有高矫顽磁力并且能够进行高密度写入/读取的磁记录介质具有基板，软磁层，非磁性中间层，磁性层，保护层和润滑层。磁性层的特征在于堆垛层错密度和粒径分散。堆垛层错密度优选为0.05以下，粒径分布优选为0.4以下。磁记录介质具有大于4000Oe的矫顽力，对热衰减高度稳定，并且具有超过50Gbit / in 2的记录密度。

9. 发明授权

US07177115B2 Magnetic recording and reading device 有权
标题翻译：磁记录读取装置
公开(公告)号：US07177115B2
公开(公告)日：2007-02-13
申请号：US10644824
申请日：2003-08-21
申请人： Yoshihiro Shiroishi
发明人： Yoshihiro Shiroishi
IPC分类号： G11B5/00
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/00 , G11B5/09 , G11B5/313 , G11B5/3909 , G11B5/3967 , G11B5/484 , G11B5/656 , G11B5/66 , G11B5/7325 , G11B2005/0002 , G11B2005/0005 , G11B2005/3996
摘要： A magnetic recording and reading device having a transfer rate of not less than 50 MB/s includes a magnetic recording medium having an absolute value of normalized noise coefficient per recording density of not more than 2.5×10−8 (μVrms)(inch) (μm)0.5/(μVpp), and magnetic head which is mounted on an integrated circuit suspension so that a total inductance is reduced to be not more than 65nH and having a magnetic core which is not more than 35 μm of length, wherein a part of the magnetic core being formed by a magnetic film having a resistivity exceeding at least 50 μΩcm or by a multilayer film consisting of a magnetic film and an insulating film. The device also includes a fast R/W-IC having a line width of not more than 0.35 μm which is installed in a position within 2 cm from a rear end of the magnetic head.
摘要翻译：具有不小于50MB / s的传送速率的磁记录和读取装置包括具有每个记录密度的归一化噪声系数的绝对值不大于2.5×10 -8的磁记录介质（ muVrms）（英寸）（mum）<0.5 /（μVpp）和安装在集成电路悬架上的磁头，使得总电感减小到不超过65nH并具有磁芯其长度不超过35μm，其中磁芯的一部分由电阻率超过50μΩgm的磁性膜或由磁性膜和绝缘膜组成的多层膜形成。该装置还包括具有不大于0.35μm的线宽的快速R / W-IC，其安装在距离磁头的后端2cm的位置。

10. 发明授权

US07149930B2 Recording/reproducing apparatus 有权
标题翻译：记录/再现装置
公开(公告)号：US07149930B2
公开(公告)日：2006-12-12
申请号：US10284238
申请日：2002-10-31
申请人： Hitoshi Ogawa , Seiichi Domyo , Yukie Hiratsuka
发明人： Hitoshi Ogawa , Seiichi Domyo , Yukie Hiratsuka
IPC分类号： G06F11/00
CPC分类号： G11B20/1883 , G11B27/105 , G11B27/329 , G11B2020/1896 , G11B2220/20 , G11B2220/216
摘要： The present invention provides a disk unit suitable for recording and reproducing time-series continuous data such as AV data.When data received as data to be written into recording medium is audio and/or video data, (this data is called AV data hereinafter), address information 403c identifying a beginning sector of the recording medium in which the data has been written is registered in file control information 402. Also, it is determined whether or not the AV data is contiguous with AV data just before written. If it is contiguous, the beginning sector is not registered in control information storage means. Thus continuous data can be handled as one piece of data.
摘要翻译：本发明提供了适用于记录和再现诸如AV数据的时间序列连续数据的盘单元。当作为要写入记录介质的数据接收的数据是音频和/或视频数据时（该数据在下文中称为AV数据），登记了已经写入数据的记录介质的起始扇区的地址信息403c 在文件控制信息402中。此外，在写入之前确定AV数据是否与AV数据相邻。如果它是连续的，则开始扇区没有被登记在控制信息存储装置中。因此，连续数据可以作为一个数据处理。

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