公开(公告)号：WO1993009532A1

公开(公告)日：1993-05-13

申请号：PCT/US1992009141

申请日：1992-10-28

Applicant: MARS INCORPORATED

Inventor： MARS INCORPORATED ,  JONES, Robert, Edward, Jr. ,  KRYDER, Mark, Howard ,  MOUNTFIELD, Keith, Robert ,  GUZMAN, Javier, Ignacio

IPC: G11B05/127

CPC classification number: G11B5/3974 ,  G01R33/09 ,  G06K7/087 ,  G07D7/04 ,  G07D7/20 ,  G11B5/09

Abstract: A new and improved unshielded horizontal magnetoresistive head (100) is disclosed which utilizes multiple pairs of magnetoresistive elements (1, 2, 3, 4). The present invention provides a device which is characterized by reduced output signal undershoot amplitudes, and an increased central peak pulse amplitude, while not significantly affecting the resolution of the device. The device is also characterized by increased signal to noise and signal to interference ratios. Magnetoresistive elements (1, 2, 3, 4) utilized in the device may be fabricated and/or manufactured by simplified processes, resulting in fabrication, manufacturing and cost benefits for the magnetoresistive head. Any number of additional magnetoresistive head. Any number of additional magnetoresistive element pairs may be utilized dependent on the accuracy and resolution required by the specific application.

Abstract translation: 公开了一种新的和改进的非屏蔽水平磁阻头（100），其利用多对磁阻元件（1,2,3,4）。 本发明提供了一种器件，其特征在于输出信号下冲幅度减小，并且增加了中心峰值脉冲幅度，同时不显着影响器件的分辨率。 该器件的特征还在于增加信噪比和信号与干扰比。 在器件中使用的磁阻元件（1,2,3,4）可以通过简化的工艺制造和/或制造，从而导致磁阻磁头的制造，制造和成本益处。 任意数量的附加磁阻头。 根据具体应用所要求的精度和分辨率，可以使用任何数量的附加磁阻元件对。

公开(公告)号：WO1990011595A1

公开(公告)日：1990-10-04

申请号：PCT/JP1990000368

申请日：1990-03-19

Applicant: SONY CORPORATION ,  SAKATA, Katsumi ,  SATO, Ikuko ,  KUMURA, Tatsuo ,  IKEDA, Yoshito ,  EGUCHI, Hiroya ,  MATSUYAMA, Hideaki ,  KARAMON, Hideaki

Inventor： SONY CORPORATION

IPC: G11B05/127

CPC classification number: G11B5/1878 ,  G11B5/1276 ,  Y10T29/49039

Abstract: The formation of a gap in a magnetic head core or the junction of a thin magnetic film of a metal with an oxide substrate of a magnetic head made of a composite of a thin magnetic film of a metal with an oxide material are conducted by the thermal diffusion between golden layers themselves at a low temperature. Then, chromium or titanium is made present between the gold layer and the junction surface to prevent deterioration of magnetic characteristics and generation of false gap and, at the same time, to heighten the junction strength. The thermal diffusion between golden layers themselves is effected at a temperature lower than that of glass fusion to suppress the deterioration of magnetic characteristics, distortion caused by the thermal expansion, and diffusion reaction on the interface. The chromium or titanium layer works to maintain junction strength between the thin magnetic layer or the oxide substrate and the golden layer.

Abstract translation: 在磁头芯中形成间隙或金属的薄磁性膜与由金属的薄磁性膜与氧化物材料的复合材料制成的磁头的氧化物基底的接合通过热 黄金层本身在低温下的扩散。 然后，在金层和接合面之间存在铬或钛，以防止磁特性的劣化和假间隙的产生，同时提高结合强度。 金层本身之间的热扩散在比玻璃熔融温度低的温度下进行，以抑制磁特性的劣化，由热膨胀引起的变形和界面上的扩散反应。 铬或钛层用于保持薄磁性层或氧化物衬底与金色层之间的结合强度。

公开(公告)号：WO1990011594A1

公开(公告)日：1990-10-04

申请号：PCT/FR1990000212

申请日：1990-03-28

Applicant: COMMISSARIAT A L'ENERGIE ATOMIQUE ,  LAZZARI, Jean-Pierre

Inventor： COMMISSARIAT A L'ENERGIE ATOMIQUE

IPC: G11B05/127

CPC classification number: G11B5/3903 ,  G11B5/1278 ,  G11B5/39

Abstract: Magnetic reading head of the horizontal type for perpendicular recording. The magnetic layer (50, 51, 52) is interrupted by two intervals arranged symmetrically with respect to the plane of the monopole (56). A U-shaped magnetoresistant element is comprised of two ribbons (34, 36) which are parallel to the monopole and are arranged respectively in both intervals of the magnetic layer. Application to the reading and optionally the writing of magnetically recorded information.

Abstract translation: 用于垂直记录的水平型磁读头。 磁性层（50,51,52）被相对于单极子（56）的平面对称地布置两个间隔。 U形磁阻元件由平行于单极的两个带（34,36）组成，分别布置在磁性层的两个间隔中。 应用于读取和可选地写入磁记录信息。

公开(公告)号：WO1987006048A1

公开(公告)日：1987-10-08

申请号：PCT/US1987000651

申请日：1987-03-24

Applicant: AMPEX CORPORATION

Inventor： AMPEX CORPORATION ,  GOOCH, Beverley, R.

IPC: G11B05/127

CPC classification number: G11B15/1875 ,  G01R33/00 ,  G11B5/4969 ,  G11B5/53

Abstract: Apparatus and method for coupling a magnetic transducer (20) with a transducing gap (26) that is wider than that used for transferring information signals to a magnetic record medium (42). A magnetic control flux is applied to the transducer to enable a selected segment of the transducing gap, which defines a transducing zone (56), for transferring information signals with respect to a selected path (126) along the magnetic record medium. Registration of the transducing zone over the selected path is maintained by varying the applied magnetic control flux to thereby move the transducing zone along the wider transducing gap so as to compensate for deviations between the path traced by the transducing zone over the magnetic record medium and the selected path.

Abstract translation: 用于将磁换能器（20）与比用于将信息信号传送到磁记录介质（42）的换能器间隙（26）更宽的换能间隙（26）耦合的装置和方法。 磁传感器被施加到换能器，以使能限定换能区（56）的换能间隙的选定段相对于沿磁记录介质的选定路径（126）传送信息信号。 通过改变所施加的磁力控制通量来维持所选择的路径上的换能区域的登记，从而沿着较宽的换能间隙移动换能区域，以便补偿由磁记录介质上的换能区域跟踪的路径与 选择路径

公开(公告)号：EP0197532A3

公开(公告)日：1988-11-02

申请号：EP86104709

申请日：1986-04-07

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： Satomi, Mitsuo ,  Kaminaka, Nobuyuki

IPC: G11B05/127 ,  G11B05/31

CPC classification number: G11B5/313 ,  G11B5/105 ,  G11B5/1475 ,  Y10T29/49043 ,  Y10T29/49048 ,  Y10T29/49057

Abstract: A magnetic head is provided having a head core constituted by a sandwiched magnetic material (9) on both sides thereof by a pair of non-magnetic substrate materials (8,10), the magnetic material (9) and the substrate materials (8,10) being bonded by crystallized glass containing crystals such as gahnite, willemite or the like.

公开(公告)号：EP0228688A3

公开(公告)日：1988-03-30

申请号：EP86117855

申请日：1986-12-22

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： Mitani, Satoru

IPC: G11B05/127

CPC classification number: G11B5/1278 ,  G11B5/31

Abstract: A perpendicular magnetic recording head having a main pole film of an amorphous alloy magnetic film containing Co as principal component is improved by being coated by a non-oxide passivation film of nitride such as Si 3 N 4 or AlN or carbide such as SiC, instead of being coated by conventional Si0 2 film; since the passivation film does not contain oxygen, the amorphous alloy film is not oxidized during annealing in the manufacturing process; and the forming of the passivation film is made in a continuous sputtering without breaking vacuum after sputtering the amorphous alloy magnetic film.

Abstract translation: 通过用诸如Si 3 N 4或Al N之类的氮化物的非氧化物钝化膜或诸如SiC的碳化物涂覆具有包含Co作为主要成分的非晶合金磁性膜的主极膜的垂直磁记录头，而不是 用常规SiO 2膜涂覆; 由于钝化膜不含氧，因此在制造工序中退火时非晶质合金膜不会被氧化， 并且钝化膜的形成在溅射非晶合金磁性膜之后在连续溅射中进行而不破坏真空。

公开(公告)号：EP0201255A3

公开(公告)日：1987-08-26

申请号：EP86303186

申请日：1986-04-28

Applicant: Matsushita Electric Industrial Co., Ltd.

Inventor： Ono, Mitsuaki ,  Ueda, Masataka ,  Miyazaki, Osamu

IPC: G11B05/23 ,  G11B05/193 ,  G11B05/127 ,  G11B05/187

CPC classification number: G11B5/1871 ,  Y10T29/49043 ,  Y10T29/49052 ,  Y10T29/49057 ,  Y10T29/49067

Abstract: n a magnetic head comprising a head gap and a magnetic core composed of both a high permeability ferrite and a magnetic alloy, said magnetic alloy being disposed in the vicinity of said head gap, the improvement comprising a corrugation provided at a junction portion between said ferrite and said magnetic alloy, a height of said corrugation being not less than a value of the longest wavelength of luminance signals and color signals recorded on a magnetic recording medium, a distance defined between adjacent two crests or bottoms of said corrugation being smaller than a width of a head track.

公开(公告)号：EP0189793A3

公开(公告)日：1987-08-26

申请号：EP86100559

申请日：1986-01-17

Applicant: International Business Machines Corporation

Inventor： Heim, David Eugene

IPC: G11B05/127 ,  G11B05/31 ,  G11B05/245

CPC classification number: G11B15/12 ,  G11B5/09 ,  G11B5/127 ,  G11B5/17 ,  G11B5/2657 ,  G11B5/31

Abstract: A magnetic head has a pair of outer pole pieces (32, 34) spaced from a central pole piece (36) to define a pair of transducing gaps (28, 30). An individual coil (12, 14) is disposed between each of the outer pole pieces and the central pole piece. The coils (12, 14) are connected to control circuit means (Figure 8) which is operable to connect the coils in series for a write operation (so that the flux in the outer pole pieces is additive for writing), and to connect the coils in series opposition for a read operation (so that the flux produced in the central pole by a previously recorded magnetic transition in the magnetic recording medium adjacent to the transducing gaps is sensed additively in the coils).

公开(公告)号：EP0136157A3

公开(公告)日：1986-10-22

申请号：EP84306424

申请日：1984-09-20

Applicant: HITACHI, LTD.

Inventor： Kumasaka, Noriyuki ,  Shiiki, Kazuo ,  Shiroishi, Yoshihiro ,  Shinagawa, Kiminari ,  Kudo, Mitsuhiro

IPC: G11B05/127 ,  G11B05/187

CPC classification number: G11B5/1278

Abstract: There is provided a magnetic head for perpendicular magnetic recording which has a main pole core (15, 20, 20') and an auxiliary pole core (16, 23, 23') and is constituted such that the side surface of the auxiliary pole core opposite to the main pole core near the surface side which faces a magnetic recording medium (10) is formed like a concave or convex shape with respect to the main pole core. This magnetic head has excellent recording and reproducing characteristics which are not subjected to the interference actions on the recording and reproduction due to the edge portion of the auxiliary pole core.

公开(公告)号：EP0106321A3

公开(公告)日：1986-08-27

申请号：EP83110220

申请日：1983-10-13

Applicant: SANYO ELECTRIC CO., LTD.

Inventor： Matsuura, Kotaro ,  Oyamada, Kenji ,  Kumakiri, Michio

IPC: G11B05/127 ,  G11B05/147

CPC classification number: G11B5/1475 ,  G11B5/10 ,  G11B5/147

Abstract: This disclosure is directed to an amorphous magnetic head which includes a main core having core halves each formed from non-laminated thin sheets of amorphous magnetic material, a non-magnetic spacer, with the core halves being abutted against each other through the non-magnetic spacer disposed in a front gap which is provided between the core halves and whose lower edge is defined by a coil winding opening formed in the core halves, and a set of reinforcing members applied onto opposite sides of the main core to hold the core halves between them. Resinous material is infiltered between the respective reinforcing members and the core halves for integration of the respective elements into one unit. The disclosure also relates to a method of manufacturing such an amorphous magnetic head on a large scale in an efficient manner.