公开(公告)号：WO1997022965A1

公开(公告)日：1997-06-26

申请号：PCT/US1996018364

申请日：1996-11-15

Applicant: QUANTUM CORPORATION

Inventor： QUANTUM CORPORATION ,  MALLARY, Michael, L.

IPC: G11B05/147

CPC classification number: G11B5/3143 ,  G11B5/312

Abstract: A low-inductance thin-film head (60) includes a flux barrier layer (52) of electrical conductive, non-magnetic material such as copper, gold and aluminum positioned on the head, wherein stray flux from the head is cut off by the flux barrier layer (52) to reduce the inductance of the head (60). Stray flux entering the barrier layer creates an eddy current in the layer which cuts off the stray flux paths of the head. The flux barrier layer (52) can be placed in various positions, including downstream or upstream of the head (60), or between the poles (14, 16), to improve the read or write performance of the head.

Abstract translation: 低电感薄膜磁头（60）包括位于磁头上的诸如铜，金和铝的导电非磁性材料的磁通阻挡层（52），其中来自头部的杂散磁通被 磁通屏障层（52），以减小磁头（60）的电感。 进入阻挡层的杂散磁通在层中产生涡流，从而切断磁头的杂散磁通路径。 磁通阻挡层52可以放置在头部（60）的下游或上游或者磁极（14,16）之间的各种位置，以改善磁头的读取或写入性能。

公开(公告)号：EP0131112A3

公开(公告)日：1986-12-03

申请号：EP84105399

申请日：1984-05-12

Applicant: GRUNDIG E.M.V. Elektro-Mechanische Versuchsanstalt Max Grundig holländ. Stiftung & Co. KG.

Inventor： Mangold, Hans ,  Kotter, Karl-Heinz ,  Uhde, Dietmar

IPC: G11B05/147 ,  G11B05/10

CPC classification number: G11B5/147 ,  G11B5/10

Abstract: Die Erfindung betrifft ein Verfahren zur Herstellung eines Magnetkopfes gemäß dem Oberbegriff des Patentanspruchs 1, wobei die Kernhälften beidseitig mit Kernträgern aus nied rigschmelzendem Glas (Erweichungspunkt

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.

公开(公告)号：WO1992016934A1

公开(公告)日：1992-10-01

申请号：PCT/US1992002199

申请日：1992-03-19

Applicant: EASTMAN KODAK COMPANY

Inventor： EASTMAN KODAK COMPANY ,  JAGIELINSKI, Tomasz, Marek

IPC: G11B05/147

CPC classification number: G11B5/147 ,  Y10S428/90 ,  Y10T428/115 ,  Y10T428/265

Abstract: A composite magnetic head (10) has a media-contact surface defined by a gapped magnetic core (12) sandwiched between a pair of ceramic substrates (14). The core is laminated and comprises thin layers (22) of sputter-deposited FeRuGaSiX uniaxial anisotropic magnetic material alternating with even thinner layers (24) of a dielectric material, where X is selected from the group consisting of Zr, Re, Ni and Co.

Abstract translation: 复合磁头（10）具有由夹在一对陶瓷基板（14）之间的间隙磁芯（12）限定的介质接触表面。 芯层叠并包括溅射沉积的FeRuGaSiX单轴各向异性磁性材料的薄层（22），其与电介质材料的更薄层（24）交替，其中X选自Zr，Re，Ni和Co。

公开(公告)号：WO1989004535A1

公开(公告)日：1989-05-18

申请号：PCT/US1988003572

申请日：1988-10-17

Applicant: AMPEX CORPORATION

Inventor： AMPEX CORPORATION ,  ORTON, Gregory, A.

IPC: G11B05/147

CPC classification number: G11B5/147 ,  G11B5/265

Abstract: A magnetic transducer of the erasing type, in which the coil (22) is pre-wound to achieve greater manufacturing economy; and in which for the same reason, and also for electromagnetic operating efficiency, the core (21) is laminated with each lamination being of one-piece fabrication. However, the single transducing gap (27) in the core (21) is too small to permit threading the coil (22) thereon. Therefore, the core is formed of flexible material so that the gap can be enlarged to accept the coil during assembly. Alternatively, the core can be fabricated initially with an enlarged gap, and the flexible core is then bent to provide a desired gap length after the coil is assembled thereon. A variational form of the invention has two erase gaps and one record-play gap with a separate coil therefor.

公开(公告)号：WO1998015948A1

公开(公告)日：1998-04-16

申请号：PCT/US1997017312

申请日：1997-10-03

Applicant: VELOCIDATA, INC.

Inventor： VELOCIDATA, INC. ,  COHEN, Uri ,  HOLLARS, Dennis, R.

IPC: G11B05/147

CPC classification number: G11B5/3123 ,  G11B5/17 ,  G11B5/3113 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3183 ,  G11B5/3967

Abstract: A low-noise toroidal thin film head (TFH) device (10) has low coil resistance and inductance, especially suitable for very high magnetic recording areal densities and channel frequencies. The length of a toroidal coil turn (32, 36) is only about 20-30 % that of the length of an average turn in the conventional planar spiral coil design. This allows either reduction of the device thermal noise (by about 6 dB) and/or increase of the device operational frequency bandwidth (by a factor of 3-5). The toroidal coil coupling efficiency between each turn and the magnetic core is practically 100 %, thereby improving the write and read-back efficiencies. In one embodiment a non-via large back-closure contact area (26) is provided between the bottom (12) and the top (14) magnetic poles. The larger back-closure contact area (26) decreases the magnetic core reluctance and improves the device efficiency. Utilization of a soft non-magnetic seed-layer (17), such as gold, eliminates interference noise.

Abstract translation: 低噪声环形薄膜头（TFH）器件（10）具有低线圈电阻和电感，特别适用于非常高的磁记录面积密度和通道频率。 在常规的平面螺旋线圈设计中，环形线圈匝（32,36）的长度仅为平均匝长的约20-30％。 这允许减少器件热噪声（约6dB）和/或器件工作频率带宽的增加（3-5倍）。 每转和磁芯之间的环形线圈耦合效率实际上为100％，从而提高写入和读回效率。 在一个实施例中，在底部（12）和顶部（14）磁极之间提供非通孔大的后封闭接触区域（26）。 较大的后封闭接触面积（26）减小了磁芯磁阻，提高了器件效率。 使用诸如金的软非磁性种子层（17）可以消除干扰噪声。

公开(公告)号：WO1997039440A1

公开(公告)日：1997-10-23

申请号：PCT/US1997006459

申请日：1997-04-18

Applicant: STORAGE TECHNOLOGY CORPORATION

Inventor： STORAGE TECHNOLOGY CORPORATION ,  SUNDARAM, Ramesh

IPC: G11B05/147

CPC classification number: G11B5/31 ,  G11B5/29 ,  G11B5/3106 ,  G11B5/313

Abstract: The present invention provides a tape head (30) with reduced pole-tip recession. A recessed substrate (37) and a closure (32) of the tape head are separated by a plurality of layers, which include, for example, a bottom layer (35), a recessed bottom pole (86), a write gap (88), a shared pole (84), a read gap (60), a top pole (82) and a top layer (48). The recessed bottom pole is positioned in the recess of the substrate. By utilizing the recessed substrate and the recessed bottom pole, the thickness of the overcoat layer is reduced, thereby reducing the distance between the substrate and the closure at an air-bearing surface of the recording head. With the present invention, wear is reduced, thereby reducing pole tip recession.

Abstract translation: 本发明提供了具有减小的极尖衰退的带头（30）。 带头的凹陷基板（37）和封闭件（32）由多个层分开，多个层包括例如底层（35），凹陷底极（86），写入间隙（88） ），共享极（84），读取间隙（60），顶极（82）和顶层（48）。 凹陷的底极位于基板的凹槽中。 通过利用凹陷的基板和凹陷的底极，减小了外涂层的厚度，从而减小了记录头的空气轴承表面处的基板和封闭件之间的距离。 通过本发明，减少了磨损，从而减少了极头退缩。

公开(公告)号：EP0191447A3

公开(公告)日：1988-12-14

申请号：EP86101672

申请日：1986-02-10

Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

Inventor： Satomi, Mitsuo ,  Hirota, Ken ,  Inoue, Osamu

IPC: G11B05/21 ,  G11B05/235 ,  G11B05/147

CPC classification number: G11B5/21 ,  G11B5/1475

Abstract: Tape contact surface of magnetic head is made of magnetic substance of multi-layered structure; interface insulation material for said multi layered structure and/or gap spacer material are made of oxide, complex oxide, nitride and carbide of transition metal elements, lla group elements of periodic table and Zn; and accumulation of magnetic material in magnet tape is prevented and output of magnetic head is stabilized.

Abstract translation: 磁头的磁带接触表面由多层结构的磁性物质制成; 所述多层结构和/或间隙间隔物材料的界面绝缘材料由过渡金属元素的氧化物，复合氧化物，氮化物和碳化物，元素周期表的IIa族元素和Zn制成; 并且防止了磁性材料在磁带中的积聚并且磁头的输出稳定。

公开(公告)号：EP0206658A3

公开(公告)日：1988-10-19

申请号：EP86304509

申请日：1986-06-12

Applicant: HITACHI, LTD.

Inventor： Kumasaka, Noriyuki ,  Otomo, Shigekazu ,  Yamashita, Takeo Esuteto Tachikawa Ichibancho ,  Saito, Noritoshi

IPC: G11B05/147 ,  G11B05/127

CPC classification number: G11B5/147 ,  G11B5/127

Abstract: A magnetic head includes ferromagnetic amorphous alloy multi-layerfilms (16) each composed of an alternate lamination of ferromagnetic amorphous alloy layers (19) and magnetic spacer layers (20). The thickness of each ferromagnetic amorphous alloy layer (19) is of 1 µm to 10 µm. The thickness of each magnetic spacer layer (20) is of 0.01 µm to 0.2 µm. The ferromagnetic amorphous alloy multi-layer films (16) constitute at least parts of the head core.

Abstract translation: 磁头包括铁磁非晶合金多层膜（16），每个铁磁非晶合金多层膜由铁磁非晶合金层（19）和磁间隔层（20）的交替叠层组成。 每个铁磁非晶合金层（19）的厚度为1μm至10μm。 每个磁性间隔层（20）的厚度为0.01μm至0.2μm。 铁磁非晶合金多层膜（16）至少构成头芯的一部分。

公开(公告)号：EP0177964A3

公开(公告)日：1987-08-12

申请号：EP85112869

申请日：1985-10-10

Applicant: SONY CORPORATION

Inventor： Yamaguchi, Takashi ,  Nagasawa, Naomi ,  Tamura, Hidemasa

IPC: C04B35/00 ,  G11B05/31 ,  G11B05/147

CPC classification number: C04B35/495 ,  G11B5/1475 ,  G11B5/31 ,  G11B5/3109 ,  Y10S428/90 ,  Y10T428/1157 ,  Y10T428/24281

Abstract: A ceramic composition particularly useful for use in thin film magnetic heads, the composition having the general formula:
wherein the ratio x/y is at least 0.74 but less than 1.00, the composition having a coefficient of thermal expansion closely matching that of the magnetic alloy film with which it is used so as to prevent separation of the two upon changes in temperature.