公开(公告)号：EP0180201A3

公开(公告)日：1988-03-16

申请号：EP85113757

申请日：1985-10-29

Applicant: SONY CORPORATION

Inventor： Seko, Satoru c/o Sony Corporation ,  Soda, Yutaka c/o Sony Corporation ,  Uchida, Hiroyuki c/o Sony Corporation ,  Sekiya, Tetsuo c/o Sony Corporation

IPC: G11B05/39 ,  G11B05/31 ,  G11B05/33

CPC classification number: G11B5/3925 ,  G11B5/3977 ,  G11B5/488

Abstract: A multi-channel magnetoresistance effect type magnetic head has a short wavelength region magnetic head element (MR and/or MRaux) and a relatively longer wavelength region magnetic head element (MRcue). The two head elements are provided on a magnetic substrate (1) with each having a magnetic circuit containing a magnetic gap (G) facing a surface adjacent to and across from a magnetic recording medium. Each magnetic circuit has a discontinuity portion with a bridging magnetoresistance effect sensing element to magnetically connect the discontinuity portion. The longer wavelength magnetic head discontinuity portion is spaced at a greater distance (L2) from the adjacent surface than is the discontinuity portion of the shorter wavelength magnetic head element (MR, MRaux).

公开(公告)号：EP0154005A3

公开(公告)日：1987-04-22

申请号：EP84114664

申请日：1984-12-04

Applicant: International Business Machines Corporation

Inventor： Vinal, Albert Watson

IPC: G11B05/33

CPC classification number: G11B5/3951 ,  G11B5/1278 ,  G11B5/332 ,  G11B5/3967 ,  G11B5/399 ,  G11B19/04

Abstract: 57 An improved read-write head for twin track vertical magnetic recording is described. Inductive, solid state, or magneto-resistive sensors may all be employed with the new read-write head structure. A preferred embodiment utilizing a magneto-resistive coupled film sensor for read back which saturates to allow writing is disclosed.

公开(公告)号：WO1996011469A1

公开(公告)日：1996-04-18

申请号：PCT/IB1995000776

申请日：1995-09-21

Applicant: PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB

Inventor： PHILIPS ELECTRONICS N.V. ,  PHILIPS NORDEN AB ,  GIJS, Martinus, Adela, Maria ,  VAN HOUTEN, Hendrik

IPC: G11B05/33

CPC classification number: B82Y25/00 ,  G11B5/31 ,  G11B5/4907 ,  G11C11/15 ,  G11C2211/5614 ,  H01F10/3254 ,  H01L43/08

Abstract: A magnetic multilayer device (1) comprising two layers (3, 5) of magnetic material which are separated by an interposed layered structure comprising a resonant-tunneling double-barrier structure (RTDBS) (7). In such a device (1), exchange coupling between the magnetic layers (3, 5) can be modified by subjection of the RTDBS (7) to an electric field. In this way, the configuration of the magnetisations (M1, M2) in the magnetic layers (3, 5), and thus the net magnetic flux generated by the device (1), can be electrically adjusted. The device (1) can be applied inter alia in a magnetic recording head.

Abstract translation: 一种磁性多层器件（1），包括由包括谐振隧穿双阻挡结构（RTDBS）（7）的插入的层状结构分离的两层磁性材料层（3,5）。 在这种装置（1）中，可以通过将RTDBS（7）置于电场来修改磁层（3,5）之间的交换耦合。 以这种方式，磁性层（3,5）中的磁化（M1，M2）的构造以及由器件（1）产生的净磁通量可以被电调节。 装置（1）可以特别地应用在磁记录头中。

公开(公告)号：WO1987002170A1

公开(公告)日：1987-04-09

申请号：PCT/DE1986000381

申请日：1986-09-19

Applicant: ROBERT BOSCH GMBH ,  REINHART, Karl-Franz

Inventor： ROBERT BOSCH GMBH

IPC: G11B05/33

CPC classification number: G11B5/3954 ,  G11B5/035 ,  G11B5/33 ,  G11B5/39

Abstract: Magnetic head (49) for reading digital magnetic information on a magnetic recording support (9), in which three or more magnetic sensors (12, 13, 14) are provided per recording track. An increase in the recording density of signals on the magnetic recording support (9) is achieved by equalization of the playback signals in the local region. The desired reduction in the half amplitude width (33) of playback signals is achieved by the interconnection of the output signals which differ in value and polarity from at least three sensors (12 to 14), which simultaneously scan the environment of a magnetic flux change in the information carrier. The distance between the sensors (12 to 14) in the recording direction (11) corresponds approximately to half of the half amplitude width (33) of the local resolution of the central sensor (12). The differing value of the output signals (32, 34, 35) occurs because of the differing geometrical dimensions of the sensors (12 to 14). The different polarity of the signal (32) of the central sensor (12) compared with the signals (34, 35) of the adjacent sensors (13, 14) can be obtained, in the case of magnetoresistive sensors by the choice of the operating points (68, 69, 70) in the regions of increases in the characteristic curve having differing signs. The equalization in this magnetic head arrangement operates irrespective of the speed at which the magnetic recording carrier (9) moves.

公开(公告)号：EP0111755A3

公开(公告)日：1986-07-30

申请号：EP83111414

申请日：1983-11-15

Applicant: International Business Machines Corporation

Inventor： Best, John Stewart ,  Lee, Kenneth ,  Tsang, Ching Hwa

IPC: G11B05/127 ,  G11B05/33 ,  G11B05/39 ,  G11B05/31

CPC classification number: G11B5/3912 ,  G11B5/3967 ,  G11B5/398 ,  G11B5/399

Abstract: A dual element magnetic transducer in which the thin film M/R read element is transversely biased by flux in the air gap of the inductive write core generated by a bias current supplied to the write winding. Flux in the air gap biases the M/R element because different integral portions of the M/R element have a different spatial relationship to parallel opposing portions of the inductive core. The flux which would normally pass through the gap substantially normal to the sides of the core defining the gap now tends to follow the M/R element along a direction normal or transverse to the media to a point where the distance between the M/R element and the core is smaller than where it entered. By appropriate control of the bias current and the spatial relationships, a relatively efficient, simple to manufacture dual element magnetic transducer is provided.

公开(公告)号：EP0099127A3

公开(公告)日：1986-02-12

申请号：EP83106921

申请日：1983-07-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Sawazaki, Norikazu

IPC: G11B05/00 ,  G11B05/33 ,  G11B05/62 ,  G11B05/127

CPC classification number: G11B5/1278 ,  G11B5/00 ,  G11B5/33 ,  G11B5/332 ,  G11B5/62

Abstract: A magnetic material (1b-2) whose high frequency characteristics vary in response to a signal field recorded on a magnetic recording medium (1) is provided as a magnetic layer in a high frequency coupling circuit including the magnetic recording medium (1) and a reproduction head (5). The coupling degree of the high frequency coupling circuit noticeably varies with the change of the high frequency characteristics of the magnetic material (1b-2), thereby enabling the reproduction of the recorded signal by utilizing the change of the high frequency characteristics.

公开(公告)号：EP0132852A3

公开(公告)日：1987-11-19

申请号：EP84108944

申请日：1984-07-27

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Akiyama, Junichi c/o Patent Division ,  Chiba, Shu c/o Patent Division ,  Sawazaki, Norikazu c/o Patent Division ,  Yatabe, Shigeru c/o Patent Division

IPC: G11B05/00 ,  G11B05/33

CPC classification number: G11B5/332 ,  G11B5/1278 ,  G11B20/24

Abstract: An apparatus for reproducing a signal recorded, in the form of a perpendicular signal magnetization, on a perpendicular magnetic recording layer (4) backed with a high permeability layer (3) of a magnetic recording medium (1). A thin-film magnetic material (5) is disposed to face the recording layer so that an enlarged magnetized region is formed in the high permeability layer, which includes the position at which the magnetic material faces the recording layer. In this region, magnetic variation occurs in response to the signal magnetization of the recording layer at the position the magnetic material faces the recording layer. A detecting member (10) such as a coil is disposed in the proximity of the magnetic material so as to be magnetically coupled to the enlarged magnetized region of the high permeability layer. The detecting member is used as a tuning element of a tuning circuit (10, 11) supplied with high frequency energy. An resonance output voltage of the high frequency circuit varies in response to the detection of magnetic variation in the high permeability layer. A reproducing circuit (14) detects the variation in the resonance output voltage of the high frequency circuit to reproduce the signal recorded on the recording layer.

公开(公告)号：EP0105531A3

公开(公告)日：1986-02-05

申请号：EP83111439

申请日：1983-07-14

Applicant: KABUSHIKI KAISHA TOSHIBA

Inventor： Sawazaki, Norikazu

IPC: G11B05/00 ,  G11B05/33 ,  G11B05/62 ,  G11B05/12

CPC classification number: G11B5/1278 ,  G11B5/00 ,  G11B5/33 ,  G11B5/332 ,  G11B5/62

Abstract: Signals are recorded on a magnet tape (1) having a magnetic recording layer (1b-2) containing a magnetic material whose high frequency characterstic varies with a magnetic field produced therein. Changes in the coupling degree of a high frequency coupling circuit (12, 20a) caused by a signal field allows to reproduce a recorded signal.

Abstract translation: 信号记录在具有包含磁性材料的磁记录层（1b-2）的磁带（1）上，磁性材料的高频特性随其中产生的磁场而变化。 由信号场引起的高频耦合电路（12,20a）的耦合度的变化允许再现记录的信号。