公开(公告)号：US20170243604A1

公开(公告)日：2017-08-24

申请号：US15258509

申请日：2016-09-07

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Katsuya SUGAWARA ,  Tomoyuki Maeda ,  Kenichiro Yamada

IPC: G11B5/39 ,  G11B5/48

CPC classification number: G11B5/3912 ,  G11B5/3954 ,  G11B5/486 ,  G11B5/4886 ,  G11B5/4984 ,  G11B15/02 ,  G11B15/12 ,  G11B19/02 ,  G11B20/10009 ,  G11B20/10268

Abstract: According to one embodiment, a magnetic recording and reproducing device includes a magnetic recording medium, a magnetic head, and a processor. The magnetic head includes a first reproducing element portion and a second reproducing element portion. The processor is configured to acquire a first signal and a second signal, and to output an output signal according to either one of the first signal and the second signal. The first signal is obtained by reproducing information recorded on a first recording region by the first reproducing element portion. The second signal is obtained by reproducing the information recorded on the first recording region by the second reproducing element portion.

公开(公告)号：US09613655B1

公开(公告)日：2017-04-04

申请号：US15180230

申请日：2016-06-13

Applicant: International Business Machines Corporation

Inventor： Said A. Ahmad ,  Wlodzimierz S. Czarnecki ,  Ernest S. Gale ,  Icko E. T. Iben

IPC: G11B5/39 ,  G11B20/18 ,  G11B5/49 ,  G11B5/008

CPC classification number: G11B5/02 ,  G11B5/00813 ,  G11B5/39 ,  G11B5/3903 ,  G11B5/3948 ,  G11B5/3977 ,  G11B5/40 ,  G11B5/4984 ,  G11B20/18 ,  G11B20/1816 ,  G11B2020/1826

Abstract: Embodiments of the present invention provide methods, systems, and computer program products for compensating for loss of current through shorted tunneling magnetoresistance (TMR) sensors. In one embodiment, for a magnetic head having multiple TMR read sensors, a first voltage limit is set for most parts and a second voltage limit is set for all of the parts. A number of TMR read sensors which are allowed to function between the first and the second voltage limits is determined using a probability algorithm, which determines the probability that the application of the second voltage limit will result in a dielectric breakdown within an expected lifetime of a drive is below a threshold value. For the number of TMR read sensors which are allowed to function at voltages between the first and second voltage limits, a determined subset of those sensors are then allowed to function at the second voltage limit.

公开(公告)号：US07271970B2

公开(公告)日：2007-09-18

申请号：US10964698

申请日：2004-10-15

Applicant: Reijiro Tsuchiya

Inventor： Reijiro Tsuchiya

IPC: G11B15/12

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/012 ,  G11B5/2652 ,  G11B5/3103 ,  G11B5/3909 ,  G11B5/3945 ,  G11B5/3948 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4984 ,  G11B20/18 ,  G11B2005/001 ,  G11B2005/0016 ,  G11B2005/3996 ,  G11B2020/183

Abstract: A conventional magnetic head has a structure, in which a MR element and a recording element are stacked. The influence of a recording magnetic field on the magnetically sensitive portion of a reproduction element is lessened and the performance of the MR element is stabilized. Also, the reliability of the magnetic disk drive using a MR element is enhanced. The magnetic disk drive uses a composite magnet head, which has a plurality of reproduction elements arranged such that the magnetically sensitive layer of a reproduction element of the composite magnetic head does not overlap with the normal direction projection of the recording element, and which lessens the influence of a recording magnetic field on the magnetically sensitive portion of each reproduction element.

Abstract translation: 传统的磁头具有堆叠MR元件和记录元件的结构。 记录磁场对再现元件的磁敏部分的影响减小，并且MR元件的性能稳定。 此外，使用MR元件的磁盘驱动器的可靠性增强。 磁盘驱动器使用复合磁头，其具有多个再现元件，其布置成使得复合磁头的再现元件的磁敏层不与记录元件的法线方向投影重叠，并且减小了 记录磁场对每个再现元件的磁敏部分的影响。

公开(公告)号：US06903891B1

公开(公告)日：2005-06-07

申请号：US10720872

申请日：2003-11-24

Applicant: Thomas McLendon Crawford ,  Mark William Covington ,  Thomas William Clinton

Inventor： Thomas McLendon Crawford ,  Mark William Covington ,  Thomas William Clinton

IPC: G11B5/00 ,  G11B5/012 ,  G11B5/02 ,  G11B5/09 ,  G11B5/105 ,  G11B5/127 ,  G11B5/17 ,  G11B5/31 ,  G11B5/48 ,  G11B5/49

CPC classification number: G11B5/00 ,  G11B5/012 ,  G11B5/105 ,  G11B5/127 ,  G11B5/1278 ,  G11B5/17 ,  G11B5/3103 ,  G11B5/488 ,  G11B5/4886 ,  G11B5/4969 ,  G11B5/4984 ,  G11B2005/001 ,  G11B2005/0013

Abstract: A write driver for use with a magnetic recording head includes a photoconductive switch that is positioned adjacent a magnetic recording head for switching current waveforms. Both light and a DC voltage are applied to the photoconductive switch to switch the applied current waveforms. The write driver further includes means for writing to a storage medium in response to current waveforms switched by the photoconductive switch. The write driver may also include a suspension that supports at least one photoconductive switch, DC conductors for supplying a DC voltage, means for supplying light, and recording head means for writing to a storage medium.

Abstract translation: 用于磁记录头的写驱动器包括位于磁记录头附近的用于切换电流波形的光导开关。 灯和直流电压都施加到光电导开关以切换所施加的电流波形。 写入驱动器还包括响应于由光电导开关切换的电流波形而写入存储介质的装置。 写入驱动器还可以包括支持至少一个感光开关，用于提供DC电压的DC导体，用于提供光的装置和用于写入存储介质的记录头装置的悬架。

公开(公告)号：US6011664A

公开(公告)日：2000-01-04

申请号：US521972

申请日：1995-08-31

Applicant: Mark Howard Kryder ,  Stanley H. Charap

Inventor： Mark Howard Kryder ,  Stanley H. Charap

IPC: G11B5/00 ,  G11B5/024 ,  G11B5/127 ,  G11B5/49 ,  G11B5/54 ,  G11B5/02 ,  G01N27/82 ,  G01R33/00 ,  G11B9/00

CPC classification number: G11B5/4969 ,  G11B5/00 ,  G11B5/127 ,  G11B5/54 ,  G11B2005/0005 ,  G11B2005/0021 ,  G11B5/024 ,  G11B5/4984 ,  Y10S977/865 ,  Y10S977/947

Abstract: Techniques for ultrahigh density writing on an erasable magnetic medium include using a micromachined mechanism having two probes for writing to the medium. Use of the two probe embodiment eliminates the need to change the magnetic orientation of the probe. In another embodiment, a single probe is provided which is heated to the vicinity of its Curie temperature to enable the magnetic orientation of the probe to be switched. The probe may be heated to its Curie temperature through the use of a heating element or a focused laser. In another embodiment of the present invention, either the magnetic orientation of the probe or the magnetic orientation of the medium may be switched through the combination of a static magnetic field, a radio frequency magnetic field and, under certain circumstances, the magnetic field of the probe. In all cases, the writing techniques enable information to be written to a magnetic medium in a manner which enables the information to be erased and the medium rewritten.

Abstract translation: 用于在可擦除磁性介质上超高密度写入的技术包括使用具有两个探针的微加工机构来写入介质。 使用两个探针实施例消除了改变探针的磁性取向的需要。 在另一个实施例中，提供单个探针，其被加热到其居里温度附近，以使得能够切换探针的磁性取向。 可以通过使用加热元件或聚焦激光将探针加热到其居里温度。 在本发明的另一个实施例中，可以通过静态磁场，射频磁场的组合来切换探针的磁性取向或介质的磁性取向，并且在某些情况下， 探测。 在所有情况下，写入技术使得能够以使得能够擦除信息并且介质被重写的方式将信息写入磁性介质。

公开(公告)号：US5880914A

公开(公告)日：1999-03-09

申请号：US926687

申请日：1997-09-10

Applicant: Jean-Claude Lehureau

Inventor： Jean-Claude Lehureau

IPC: G11B5/31 ,  G11B5/29 ,  G11B5/49

CPC classification number: G11B5/4984 ,  G11B5/29 ,  G11B5/4976 ,  G11B5/3183

Abstract: Disclosed is a recording and/or reading device with magnetic heads including at least two magnetic heads. A magnetic circuit for the closing of the magnetic flux has a pad common to both heads. A first pole of a first type magnetically couples the common pad to the gap of the first head through a non-magnetic link. A second pole of a second type, separated from the first pole by a non-magnetic interval, magnetically couples the common pad to the gap of the second head. Such a device finds applications to a system for recording and/or reading, notably on magnetic tapes.

Abstract translation: 公开了一种具有包括至少两个磁头的磁头的记录和/或读取装置。 用于闭合磁通的磁路具有两个磁头共同的焊盘。 第一类型的第一极通过非磁性链路将公共焊盘磁耦合到第一磁头的间隙。 第二类型的第二极与第一极分开非磁性间隔，将公共垫磁耦合到第二头的间隙。 这样的设备可以应用于用于记录和/或读取的系统，特别是在磁带上。

公开(公告)号：US09773517B2

公开(公告)日：2017-09-26

申请号：US14685417

申请日：2015-04-13

Applicant: Seagate Technology LLC

Inventor： Kaizhong Gao ,  Edward Gage ,  Huaqing Yin ,  Yonghua Chen

IPC: G11B21/02 ,  G11B5/49 ,  G11B5/31 ,  G11B5/012 ,  G11B5/127 ,  G11B5/48

CPC classification number: G11B5/4984 ,  G11B5/012 ,  G11B5/1278 ,  G11B5/3116 ,  G11B5/4886

Abstract: A storage device includes a transducer head with multiple write elements having write poles of different sizes. For example, the transducer head may include two write poles of different width configured to write to a same surface of a storage medium. A controller of the storage device is configured to selectively engage one of the multiple write elements to write data to the storage medium.

公开(公告)号：US20070164264A1

公开(公告)日：2007-07-19

申请号：US10529680

申请日：2003-09-30

Applicant: Kars-Michiel Lenssen ,  Hendrik Van Houten

Inventor： Kars-Michiel Lenssen ,  Hendrik Van Houten

IPC: H01L47/00

CPC classification number: B82Y25/00 ,  B82Y10/00 ,  G11B5/00 ,  G11B5/012 ,  G11B5/03 ,  G11B5/09 ,  G11B5/3909 ,  G11B5/3932 ,  G11B5/4886 ,  G11B5/4984 ,  G11B5/743 ,  G11B5/82 ,  G11B9/14 ,  G11B9/1445 ,  G11B9/1454 ,  G11B9/1472 ,  G11B9/1481 ,  G11B11/007 ,  G11B11/08 ,  G11B23/0014 ,  G11B2005/0002 ,  G11B2005/0005 ,  G11B2005/0008 ,  G11C11/02 ,  G11C11/16

Abstract: A record carrier (40) of a removable type has an information plane that is provided with a pattern of an electro-magnetic material constituting an array of bit locations (11). The presence or absence of said material at the information plane represent the value of a bit location. The device has an interface surface (32) for cooperating with the information plane. The interface surface is provided with an array of electro-magnetic sensor elements (54,56) that are sensitive to the presence of said electro-magnetic material within a near-field working distance. The record carrier and device system have alignment means (38,41) for positioning the bit locations near the sensor elements within the near-field working distance between a bit location and the corresponding sensor when the record carrier is mounted in the device.

Abstract translation: 可拆卸式的记录载体（40）具有设置有构成钻头位置（11）阵列的电磁材料的图案的信息平面。 在信息平面处存在或不存在所述材料表示位位置的值。 该设备具有用于与信息平面配合的接口表面（32）。 接口表面设置有在近场工作距离内对所述电磁材料的存在敏感的电磁传感器元件阵列（54,56）。 记录载体和装置系统具有对准装置（38,41），用于当记录载体安装在装置中时，将位置靠近传感器元件的位位置定位在钻头位置与对应的传感器之间的近场工作距离内。

公开(公告)号：US20040169952A1

公开(公告)日：2004-09-02

申请号：US10799622

申请日：2004-03-15

Applicant: HITACHI, LTD.

Inventor： Shigeru Yamazaki ,  Kemmei Masuda ,  Toshio Tsuchiya

IPC: G11B015/14 ,  G11B005/03

CPC classification number: G11B15/14 ,  G11B5/012 ,  G11B5/4984 ,  G11B5/531 ,  G11B15/125 ,  G11B33/121 ,  G11B33/122 ,  G11B2005/0016 ,  G11B2005/0018

Abstract: A recording/reproducing apparatus capable of switching over among a plurality of heads with high precision, wherein the apparatus is provided with: a recording/reproducing unit for recording/reproducing signals onto/from a recording medium with a plurality of heads; a generating unit for generating control data for controlling the recording/reproducing unit; and a transmitting unit for transmitting control data generated by the generating unit to the recording/reproducing unit, wherein priority is given in transmission to data for controlling the switching of the plurality of heads over other data.

公开(公告)号：US06475650B2

公开(公告)日：2002-11-05

申请号：US09961292

申请日：2001-09-25

Applicant: Satoshi Watanabe ,  Toshiyuki Onogi ,  Masahiko Ichimura ,  Yoshimasa Ono ,  Tomihiro Hashizume ,  Yasuo Wada ,  Yuji Suwa

Inventor： Satoshi Watanabe ,  Toshiyuki Onogi ,  Masahiko Ichimura ,  Yoshimasa Ono ,  Tomihiro Hashizume ,  Yasuo Wada ,  Yuji Suwa

IPC: G11B539

CPC classification number: B82Y30/00 ,  B82B1/00 ,  B82B3/00 ,  B82Y15/00 ,  B82Y25/00 ,  B82Y40/00 ,  G11B5/00 ,  G11B5/3945 ,  G11B5/3961 ,  G11B5/3967 ,  G11B5/49 ,  G11B5/4984 ,  G11B2005/0005 ,  H01F1/0036 ,  H01F1/0302 ,  Y10S428/90 ,  Y10T428/1136 ,  Y10T428/1193 ,  Y10T428/32

Abstract: A ferromagnetic material can be formed in a very small size on the order of an atomic size and is capable of being stably magnetized. The ferromagnetic material comprises basic unit structures each consisting of a first atom (11), a second atom (12) of the same kind as the first atom (11), and a third atom (or atomic group) (13) of the same kind as the first atom (11) or of a kind different from that of the first atom (11). In each of the basic unit structures, the atoms are arranged on a surface of a substrate so that a chemical bond (14) is formed between the first atom or molecule and the third atom or molecule, a chemical bond (14) is formed between the second atom or molecule and the third atom or molecule, and a chemical bond or an electron path (15) not passing the third atom is formed between the first and the second atom or molecule, wherein said third atoms or molecules consist of As atoms.

Abstract translation: 铁磁材料可以以原子尺寸的数量级的非常小的尺寸形成，并且能够被稳定地磁化。 铁磁材料包括各自由与第一原子（11）相同类型的第一原子（11），第二原子（12）和与第一原子（11）相同种类的第二原子（12）和其第三原子（或原子团）（13）组成的基本单元结构 作为第一原子（11）或与第一原子（11）不同的一种。 在每个基本单元结构中，原子布置在基板的表面上，使得在第一原子或分子与第三原子或分子之间形成化学键（14），在第一原子或分子与第三原子或分子之间形成化学键（14）， 在第一和第二原子或分子之间形成第二原子或分子和第三原子或分子，以及不通过第三原子的化学键或电子通路（15），其中所述第三原子或分子由As原子 。