公开(公告)号：US07636212B2

公开(公告)日：2009-12-22

申请号：US11303851

申请日：2005-12-15

Applicant: Akira Morinaga ,  Hideki Zaitsu ,  Hiroshi Ide ,  Hideo Tanabe

Inventor： Akira Morinaga ,  Hideki Zaitsu ,  Hiroshi Ide ,  Hideo Tanabe

IPC: G11B5/02 ,  G11B5/03

CPC classification number: G11B19/04 ,  G11B5/02 ,  G11B33/1406 ,  G11B2005/0018

Abstract: An output of a magnetic head changes depending on the environmental temperature of a magnetic disk. In particular, under cold temperature conditions, an output of the head largely decreases mainly due to an increase in coercivity of a magnetic recording medium, which degrades an error rate. In one embodiment of the invention, sense-current optimization processing of a magnetic disk drive comprises the steps of: measuring the environmental temperature; and after a sense-current value which is set from the viewpoint of the reliability of the magnetic head is defined as an upper limit, finding out a sense current Is that can achieve the best error rate (BER) at the temperature. While changing a value of the sense current Is inside the magnetic disk drive, an error rate is measured. Then, a sense current Is_opt at which the best error rate properties are achieved is selected as a new set value.

Abstract translation: 磁头的输出根据磁盘的环境温度而变化。 特别是在低温条件下，由于磁记录介质的矫顽力的增加，磁头的输出主要下降，这降低了误差率。 在本发明的一个实施例中，磁盘驱动器的感测电流优化处理包括以下步骤：测量环境温度; 在从磁头的可靠性的观点来设定的感测电流值被定义为上限之后，找出能够在该温度下达到最佳误码率（BER）的感测电流Is。 在更改磁盘驱动器内的感应电流Is的值时，会测量错误率。 然后，选择实现最佳误码率属性的感测电流Is_opt作为新的设定值。

公开(公告)号：US20080204924A1

公开(公告)日：2008-08-28

申请号：US12072001

申请日：2008-02-21

Applicant: Jun Ohno ,  Atsushi Yatagai ,  Satoshi Ohki ,  Hiroshi Ide

Inventor： Jun Ohno ,  Atsushi Yatagai ,  Satoshi Ohki ,  Hiroshi Ide

IPC: G11B21/02

CPC classification number: G11B5/6029 ,  G11B5/607 ,  G11B5/6076

Abstract: Embodiments of the present invention help to compute controlling quantity to make the spacing between a floating head slider and a recording medium optimum without damaging the floating head slider and the recording medium by detecting the floating head slider's contact with the recording medium with high sensitivity. According to one embodiment, when the floating head slider is floating over the magnetic disk, a controller takes samples of a notable characteristic value (amplitude) from signals reproduced by a reproducing head, retains the variation of the sample amplitude as a reference signal, takes samples of amplitude from signals reproduced by the reproducing head while reducing the spacing between the floating head slider and the magnetic disk gradually, produces a signal which is the sample signal from which the reference signal is subtracted, detects the floating head slider's contact with the magnetic disk when the fluctuation of the signal so produced exceeds a reference value and, on the basis of a fly-height-control mechanism's controlling quantity at the time of the contact, computes the controlling quantity for making the spacing between the floating head slider and the magnetic disk optimum.

Abstract translation: 本发明的实施例有助于通过以高灵敏度检测浮动磁头滑块与记录介质的接触来计算控制量以使浮动磁头滑块和记录介质之间的间隔最佳而不损坏浮动磁头滑块和记录介质。 根据一个实施例，当浮动磁头滑动器浮动在磁盘上时，控制器从由再现磁头再现的信号中获取显着的特征值（振幅）的采样，保持采样振幅的变化作为参考信号， 逐渐减小浮动磁头滑块和磁盘之间的间隔，产生一个信号，该信号是从其中减去参考信号的采样信号，检测浮动磁头滑块与磁铁的接触。 当这样产生的信号的波动超过参考值时，并且基于飞行高度控制机构在接触时的控制量，计算用于使浮动滑块滑块和 磁盘最佳。

公开(公告)号：US20060132963A1

公开(公告)日：2006-06-22

申请号：US11303851

申请日：2005-12-15

Applicant: Akira Morinaga ,  Hideki Zaitsu ,  Hiroshi Ide ,  Hideo Tanabe

Inventor： Akira Morinaga ,  Hideki Zaitsu ,  Hiroshi Ide ,  Hideo Tanabe

IPC: G11B21/02 ,  G11B19/02

CPC classification number: G11B19/04 ,  G11B5/02 ,  G11B33/1406 ,  G11B2005/0018

Abstract: An output of a magnetic head changes depending on the environmental temperature of a magnetic disk. In particular, under cold temperature conditions, an output of the head largely decreases mainly due to an increase in coercivity of a magnetic recording medium, which degrades an error rate. In one embodiment of the invention, sense-current optimization processing of a magnetic disk drive comprises the steps of: measuring the environmental temperature; and after a sense-current value which is set from the viewpoint of the reliability of the magnetic head is defined as an upper limit, finding out a sense current Is that can achieve the best error rate (BER) at the temperature. While changing a value of the sense current Is inside the magnetic disk drive, an error rate is measured. Then, a sense current Is_opt at which the best error rate properties are achieved is selected as a new set value.

公开(公告)号：US06937449B2

公开(公告)日：2005-08-30

申请号：US10077854

申请日：2002-02-20

Applicant: Hiroyuki Hoshiya ,  Masahiko Hatatani ,  Hisashi Kimura ,  Hiroshi Ide

Inventor： Hiroyuki Hoshiya ,  Masahiko Hatatani ,  Hisashi Kimura ,  Hiroshi Ide

IPC: G01R33/09 ,  G11B5/39 ,  H01F10/28 ,  H01F10/32 ,  H01L43/08

CPC classification number: B82Y10/00 ,  G11B5/3903 ,  G11B5/3967

Abstract: To provide a spin-valve type magnetic head having high read output even if track width is narrow and high stability, a magnetic head according to the invention is provided with a spin-valve type magnetoresistive element in which a single magnetic domain turning ferromagnetic layer is formed on a soft magnetic free layer via a non-magnetic separating layer, the soft magnetic free layer and the single magnetic domain turning ferromagnetic layer are magnetostatically coupled at the end of track width, a closed magnetic circuit is formed and the soft magnetic layer has magnetization substantially induced in a direction substantially perpendicular to an external magnetic field.

Abstract translation: 为了提供具有高读取输出的自旋阀式磁头，即使磁道宽度窄且稳定性高，根据本发明的磁头设置有自旋阀型磁阻元件，其中单个磁畴转动铁磁层为 通过非磁性分离层形成在软磁自由层上，软磁自由层和单磁畴转动铁磁层在磁道宽度末端被静磁耦合，形成闭合磁路，软磁层具有 在大致垂直于外部磁场的方向上大致感应出磁化。

公开(公告)号：US06934128B2

公开(公告)日：2005-08-23

申请号：US10916450

申请日：2004-08-12

Applicant: Yuko Tsuchiya ,  Hiroyuki Hoshiya ,  Yoshiaki Kawato ,  Katsuro Watanabe ,  Hiroshi Ide

Inventor： Yuko Tsuchiya ,  Hiroyuki Hoshiya ,  Yoshiaki Kawato ,  Katsuro Watanabe ,  Hiroshi Ide

IPC: G11B5/31 ,  G11B5/127 ,  G11B5/265 ,  G11B5/39

CPC classification number: G11B5/3116 ,  G11B5/1278 ,  G11B5/2652 ,  G11B5/3146 ,  G11B5/315

Abstract: 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.

公开(公告)号：US06493297B1

公开(公告)日：2002-12-10

申请号：US08056812

申请日：1993-05-04

Applicant: Soichi Isono ,  Satoshi Kawamura ,  Kiyoshi Honda ,  Toshimitsu Kaku ,  Hitoshi Komatsu ,  Yuji Yamane ,  Yasushi Fukuda ,  Toshio Niihara ,  Hiroshi Ide

Inventor： Soichi Isono ,  Satoshi Kawamura ,  Kiyoshi Honda ,  Toshimitsu Kaku ,  Hitoshi Komatsu ,  Yuji Yamane ,  Yasushi Fukuda ,  Toshio Niihara ,  Hiroshi Ide

IPC: G11B7095

CPC classification number: G11B7/08505 ,  G11B7/14

Abstract: Multibeam optical disk record and reproduction apparatus and method, in which at least two light beams generated are concentrated in different positions of on recording tracks of a recording medium to record or reproduce data to or from the recording medium on the different positions at the same time. The light beams are moved independently of each other across the recording tracks so that any one light beam is movable during the recording or reproducing of data by another light beam. This allows parallel recording/reproducing with a plurality of light beams without producing areas unaccessed due to the jumps of the light beams.

Abstract translation: 多光束光盘记录和再现装置和方法，其中产生的至少两个光束集中在记录介质的记录轨道上的不同位置，以在同一时间在不同位置记录或从记录介质再现数据 。 光束在记录轨道之间彼此独立地移动，使得任何一个光束在由另一个光束记录或再现数据期间是可移动的。 这允许使用多个光束的并行记录/再现，而不会由于光束的跳跃而产生不能被占用的区域。

公开(公告)号：US06373407B1

公开(公告)日：2002-04-16

申请号：US09255733

申请日：1999-02-23

Applicant: Takushi Nishiya ,  Tatsuya Hirai ,  Seiichi Mita ,  Takashi Nara ,  Yoichi Uehara ,  Hiroshi Ide ,  Kyoko Tsukano ,  Yoshiju Watanabe

Inventor： Takushi Nishiya ,  Tatsuya Hirai ,  Seiichi Mita ,  Takashi Nara ,  Yoichi Uehara ,  Hiroshi Ide ,  Kyoko Tsukano ,  Yoshiju Watanabe

IPC: H03M700

CPC classification number: H03M5/145 ,  G11B20/1426 ,  G11B2020/1446

Abstract: The computer system includes a host system, a recording medium, and a digital signal decoder connected to the host system and the recording medium. The digital signal decoder receives M-bit data and generates an N-bit code word from the M-bit data. The number of consecutive bits of 1 in the code word is not larger than a first predetermined number K, and the number of consecutive bits of 0 is not larger than a second predetermined number L. When data is recorded/reproduced by a method such as NRZI (Non-Return to Zero Inverted), or the like, there is a defect in that the number of transitions of data is larger in a code with a high data encoding rate, and the run length of zero is long thereby increasing the data decoding error rate with the recording/reproducing of data. In the digital signal decoder according to the present invention, any code word includes at most 3 consecutive bits of 1, and at most 11 consecutive bits of 0, so that the data decoding error rate can be reduced.

Abstract translation: 计算机系统包括主机系统，记录介质和连接到主机系统和记录介质的数字信号解码器。 数字信号解码器接收M位数据并从M位数据生成N位代码字。 代码字中的连续比特数1不大于第一预定数K，连续比特数0不大于第二预定数L.当通过诸如以下方法记录/再现数据时 NRZI（不归零归零）等，存在数据的转换次数较大的缺点，数据编码速率高的代码，零的行程长，从而增加数据 解码错误率与数据的记录/再现。 在根据本发明的数字信号解码器中，任何代码字包括最多3个连续位1和至多11个连续位0，从而可以减少数据解码错误率。

公开(公告)号：US06327112B1

公开(公告)日：2001-12-04

申请号：US09227078

申请日：1999-01-05

Applicant: Hiroshi Ide ,  Futoshi Tomiyama ,  Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hisashi Takano ,  Yohji Maruyama ,  Atsushi Nakamura ,  Hideki Sawaguchi

Inventor： Hiroshi Ide ,  Futoshi Tomiyama ,  Yasutaka Nishida ,  Takehiko Hamaguchi ,  Hisashi Takano ,  Yohji Maruyama ,  Atsushi Nakamura ,  Hideki Sawaguchi

IPC: G11B5596

CPC classification number: G11B19/04 ,  G11B5/596

Abstract: An information storage apparatus has a disk medium setting data recording areas along a plurality of tracks concentrically arranged, a head for recording and reproducing data on tracks of the disk medium, an actuator for moving the head to a desired track among the plurality of tracks. Also included is an electric circuit for controlling recording and reproducing in response to detecting the distance from a recorded magnetization pattern on an adjacent track in the radial direction by detecting previously recorded signals on adjacent tracks while data recording. Even if the track density is increased, the upper limit of a threshold value of a function for preventing off-track recording of the information storage apparatus can be increased and a high track density of the information storage apparatus can be easily realized.

Abstract translation: 信息存储装置具有盘介质，沿着同心配置的多个轨道设置数据记录区域，用于在盘介质的轨道上记录和再现数据的磁头，用于将磁头移动到多个磁道中的期望磁道的致动器。 还包括用于响应于通过在数据记录期间检测相邻轨道上的先前记录的信号来检测与径向上的相邻轨道上的记录磁化模式的距离来控制记录和再现的电路。 即使磁道密度增加，也可以增加用于防止信息存储装置的越野记录的功能的阈值的上限，并且可以容易地实现信息存储装置的高磁道密度。

公开(公告)号：US5498641A

公开(公告)日：1996-03-12

申请号：US224879

申请日：1994-04-08

Applicant: Toshiyuki Urano ,  Hideki Nagasaka ,  Masaaki Tsuchiyama ,  Hiroshi Ide

Inventor： Toshiyuki Urano ,  Hideki Nagasaka ,  Masaaki Tsuchiyama ,  Hiroshi Ide

IPC: C08F2/50 ,  G03F7/029 ,  C08F4/14 ,  C08F4/649

CPC classification number: G03F7/029 ,  C09B23/04 ,  C09B69/105

Abstract: A photopolymerizable composition comprising at least an addition polymerizable compound having at least one ethylenically unsaturated double bond and a photopolymerization initiator system, which system comprises (a) a sensitizer of the formula (I): ##STR1## wherein each of R.sup.1 to R.sup.6 is hydrogen, halogen, alkyl, aryl, aralkyl, acyl, alkoxycarbonyl, optionally substituted hydrocarbon ring, optionally substituted heterocyclic residue or --SO.sub.3 --R.sup.8, wherein R.sup.8 is hydrogen, alkyl, aryl, aralkyl, alkali metal, or quaternary ammonium, R.sup.7 is hydrogen, alkyl, aryl, aralkyl, optionally substituted hydrocarbon ring, or optionally substituted heterocyclic group, each of X.sup.1 and X.sup.2 is halogen, alkyl, aryl, aralkyl, optionally substituted hydrocarbon ring, or optionally substituted heterocyclic group, and (b) a titanocene compound.

Abstract translation: 至少包含具有至少一个烯键式不饱和双键的加聚聚合化合物和光聚合引发剂体系的可光聚合组合物，该体系包含（a）式（I）的敏化剂：基，卤素，烷基，芳基，芳烷基，酰基 ，烷氧基羰基，任选取代的烃环，任选取代的杂环残基或-SO 3 -R 8，其中R 8是氢，烷基，芳基，芳烷基，碱金属或季铵，R 7是氢，烷​​基，芳基，芳烷基，任选取代的烃环 或任选取代的杂环基，X 1和X 2各自为卤素，烷基，芳基，芳烷基，任选取代的烃环或任选取代的杂环基，和（b）二茂钛化合物。

公开(公告)号：US5333126A

公开(公告)日：1994-07-26

申请号：US16897

申请日：1993-02-12

Applicant: Yasushi Fukuda ,  Hiroshi Ide ,  Atsushi Saito ,  Takeshi Maeda ,  Fumiyoshi Kirino ,  Tsuyoshi Toda

Inventor： Yasushi Fukuda ,  Hiroshi Ide ,  Atsushi Saito ,  Takeshi Maeda ,  Fumiyoshi Kirino ,  Tsuyoshi Toda

IPC: G11B7/0045 ,  G11B20/12 ,  G11B20/14 ,  G11B27/30 ,  G11B5/76 ,  G11B5/09

CPC classification number: G11B20/1217 ,  G11B20/1426 ,  G11B27/3027 ,  G11B7/0045 ,  G11B2220/20

Abstract: When record marks are recorded on a recording medium while making a code symbol "1" of data by obtained coding write information according to a coding system having no DC free property correspond to every edge of the record marks, the recording is effected while inserting resynchronizing signals into the write information with a constant interval. For the resynchronizing signal either one selected between a first resynchronizing code pattern, in which the number of symbols "1" contained therein is even, and a second resynchronizing code pattern, in which the number of symbols "1" is odd, so that an accumulated charge obtained from the run length of the coded data approaches zero is used. Each of the first and the second resynchronizing code pattern contains at least a specified pattern, which doesn't meet the coding rule. The selection is effected by adding a run length switching code to the resynchronizing signal and by switching it to "0" or "1" depending on an output of a run length measuring circuit and a run length judging circuit. In this way it is possible to suppress fluctuations in the level of a reproduced signal obtained from the record marks recorded on the recording medium and to realize a stable data detection by using the original waveform detection method, by which the reproduced signal is converted into a binary signal by using a suitable slice level.

Abstract translation: 当记录标记被记录在记录介质上时，通过根据不具有直流自由特性的编码系统获得的编码写入信息，使数据的代码符号“1”对应于记录标记的每个边缘，记录是在插入再同步 以恒定的间隔将信号写入信息。 对于再同步信号，其中在其中包含在其中的符号“1”的数量为偶数的第一重新同步码模式和符号“1”的数量为奇数的第二再同步码模式之间选择，使得 使用从编码数据的游程长度获得的累积电荷接近零。 第一和第二再同步代码模式中的每一个至少包含指定的模式，其不符合编码规则。 通过将游程长度切换码添加到重新同步信号并根据游程长度测量电路和游程长度判断电路的输出将其切换为“0”或“1”来进行选择。 以这种方式，可以抑制从记录在记录介质上的记录标记获得的再现信号的电平的波动，并且通过使用原始波形检测方法来实现稳定的数据检测，通过该原始波形检测方法将再现信号转换成 二进制信号通过使用合适的限幅电平。