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1. 发明公开

EP0602567A3 Magnetic transducer head 失效
公开(公告)号：EP0602567A3
公开(公告)日：1994-10-12
申请号：EP93119981.4
申请日：1993-12-10
申请人： SONY CORPORATION
发明人： Saito, Tadashi , Takahashi, Shinji , Watanabe, Toshinobu
IPC分类号： G11B5/127 , G11B5/133 , G11B5/235 , G11B5/147
CPC分类号： G11B5/1875 , G11B5/1274 , Y10T428/1193
摘要： A magnetic head capable of preventing erosion of the magnetic metal film despite the absence of a protective film and suppressing the decrease in the playback output due to decrease in the track width while preventing cracking from being initiated and developed in the ferrite substrate. The magnetic head is prepared by forming magnetic core half blocks and by bonding the core half blocks by gap bonding using a fusion glass, each of the magnetic core half blocks being previously formed by stacking ferrite substrates 3, 5 on another ferrite substrate 4, 6, having magnetic metal films 1, 2 via glass films 10, 11 and forming track width adjustment grooves 18, 19. The glass transition temperature Tg of the glass employed for stacking the ferrite substrates is set so as to be higher than the glass yield point Tc of the fusion glass.

2. 发明授权

EP0149281B1 Magnetic head 失效
公开(公告)号：EP0149281B1
公开(公告)日：1989-03-08
申请号：EP84201915.0
申请日：1984-12-19
申请人： Philips Electronics N.V.
发明人： Gorter, Frederik Willem , Morel, Jean-Paul Germain René , Ruigrok, Jacobus Josephus Maria
IPC分类号： G11B5/127 , G11B5/23
CPC分类号： G11B5/2652 , G11B5/1875

3. 发明公开

EP0352889A3 Magnetic head and method for manufacturing same 失效
标题翻译：磁头及其制造方法
公开(公告)号：EP0352889A3
公开(公告)日：1990-12-05
申请号：EP89305798.4
申请日：1989-06-08
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Ihara, Keita , Yohda, Hiroshi , Sawai, Eisuke , Takahashi, Ken
IPC分类号： G11B5/187
CPC分类号： G11B5/127 , G11B5/1875
摘要： There is disclosed herein a magnetic head comprising a ring-like magnetic core composed of first and second magnetic core halves made of a ferrite and held in abutment against each other so as to form a magnetic gap therebetween and an elongated tape-contact surface extending across the magnetic gap. The magentic core has in the tape-contact surface a channel formed to as to extend in the direction across the magnetic gap and the channel is filled with a magnetic metal material having a high-saturation magnetization. Preferably, the channel has a substantially V-shaped cross section. The magenetic gap exposed on the tape-contact surface is surrounded by the magnetic metal material and non-magnetic glass members provided at both ends of the magnetic gap. The non-magnetic glass members are provided so that the track width is constant from the tape-contact surface to an upper end of a winding hole of the ring-like magnetic core.

4. 发明公开

EP0149281A2 Magnetic head 失效
标题翻译： Magnetkopf。
公开(公告)号：EP0149281A2
公开(公告)日：1985-07-24
申请号：EP84201915.0
申请日：1984-12-19
申请人： Philips Electronics N.V.
发明人： Gorter, Frederik Willem , Morel, Jean-Paul Germain René , Ruigrok, Jacobus Josephus Maria
IPC分类号： G11B5/127 , G11B5/23
CPC分类号： G11B5/2652 , G11B5/1875
摘要： A magnetic head is provided having a core of a soft-magnetic material with a comparatively low saturation magnetization and layers of a soft-magnetic material having a higher saturation magnetization than the material of the core on the gap-bounding faces. In order to avoid the detrimental effects of the non-magnetic transition zones between the material of the core and the layers of soft-magnetic material, which transition zones as it were form subsidiary gaps, the layers of soft-magnetic material on the gap-bounding faces have different thicknesses.
摘要翻译：提供一种磁头，其具有具有相对低饱和磁化强度的软磁材料芯和具有比间隙界面上的芯材料饱和磁化强度高的软磁材料层。为了避免核心材料与软磁材料层之间的非磁性过渡区域的不利影响，这些过渡区域形成辅助间隙，间隙上的软磁材料层，边界面具有不同的厚度。

5. 发明授权

EP0352889B1 Magnetic head and method for manufacturing same 失效
标题翻译：磁头和制造方法。
公开(公告)号：EP0352889B1
公开(公告)日：1994-04-20
申请号：EP89305798.4
申请日：1989-06-08
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Ihara, Keita , Yohda, Hiroshi , Sawai, Eisuke , Takahashi, Ken
IPC分类号： G11B5/187
CPC分类号： G11B5/127 , G11B5/1875

6. 发明授权

EP0300605B1 Magnetic head for reading and/or writing data from and/or onto a magnetic medium 失效
标题翻译：用于读取和/或写入数据的磁头和/或磁性介质
公开(公告)号：EP0300605B1
公开(公告)日：1992-08-19
申请号：EP88305231.8
申请日：1988-06-08
申请人： SEAGATE TECHNOLOGY INTERNATIONAL
发明人： Perlov, Craig Meyer
IPC分类号： G11B5/187 , G11B5/23 , G11B5/235
CPC分类号： G11B5/1875 , G11B5/127 , G11B5/1878

7. 发明公开

EP0149281A3 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0149281A3
公开(公告)日：1985-08-14
申请号：EP84201915
申请日：1984-12-19
申请人： N.V. Philips' Gloeilampenfabrieken
发明人： Gorter, Frederik Willem , Morel, Jean-Paul Germain René , Ruigrok, Jacobus Josephus Maria
IPC分类号： G11B05/127 , G11B05/23 , G11B05/265
CPC分类号： G11B5/2652 , G11B5/1875
摘要： A magnetic head is provided having a core of a soft-magnetic material with a comparatively low saturation magnetization and layers of a soft-magnetic material having a higher saturation magnetization than the material of the core on the gap-bounding faces. In order to avoid the detrimental effects of the non-magnetic transition zones between the material of the core and the layers of soft-magnetic material, which transition zones as it were form subsidiary gaps, the layers of soft-magnetic material on the gap-bounding faces have different thicknesses.
摘要翻译：提供了一种磁头，其具有饱和磁化强度相对较低的软磁材料的磁芯和饱和磁化强度比间隙界定面上的磁芯材料更高的软磁材料层。为了避免芯部材料与软磁材料层之间的非磁性过渡区域的不利影响，当它形成辅助间隙时，所述过渡区域在间隙形成层上的软磁材料层，边界面具有不同的厚度。

8. 发明公开

EP0602567A2 Magnetic transducer head 失效
标题翻译：磁传感器头
公开(公告)号：EP0602567A2
公开(公告)日：1994-06-22
申请号：EP93119981.4
申请日：1993-12-10
申请人： SONY CORPORATION
发明人： Saito, Tadashi , Takahashi, Shinji , Watanabe, Toshinobu
IPC分类号： G11B5/127 , G11B5/133 , G11B5/235 , G11B5/147
CPC分类号： G11B5/1875 , G11B5/1274 , Y10T428/1193
摘要： A magnetic head capable of preventing erosion of the magnetic metal film despite the absence of a protective film and suppressing the decrease in the playback output due to decrease in the track width while preventing cracking from being initiated and developed in the ferrite substrate. The magnetic head is prepared by forming magnetic core half blocks and by bonding the core half blocks by gap bonding using a fusion glass, each of the magnetic core half blocks being previously formed by stacking ferrite substrates 3, 5 on another ferrite substrate 4, 6, having magnetic metal films 1, 2 via glass films 10, 11 and forming track width adjustment grooves 18, 19. The glass transition temperature Tg of the glass employed for stacking the ferrite substrates is set so as to be higher than the glass yield point Tc of the fusion glass.
摘要翻译：一种磁头，即使不存在保护膜，也能够防止磁性金属膜的侵蚀，并且能够抑制由于磁道宽度的减小导致的回放输出的降低，同时防止裂纹在铁氧体基板中开始和显影。通过形成磁芯半块并且通过使用熔融玻璃通过间隙键合来键合半芯块来准备磁头，每个半芯磁芯事先通过在另一铁氧体衬底4,6上层叠铁氧体衬底3,5而形成，经由玻璃膜10,11具有磁性金属膜1,2，并且形成轨道宽度调整槽18,19。用于层叠铁氧体基板的玻璃的玻璃化转变温度Tg被设定为高于玻璃屈服点熔融玻璃的Tc。

9. 发明授权

EP0159039B1 Magnetic recording and reproducing system with composite magnetic head 失效
标题翻译：具有复合磁头的磁记录和再现系统
公开(公告)号：EP0159039B1
公开(公告)日：1992-01-22
申请号：EP85104722.5
申请日：1985-04-18
申请人： HITACHI, LTD.
发明人： Otomo, Shigekazu , Kumasaka, Noriyuki , Yamashita, Takeo , Morikawa, Juichi , Kobayashi, Takayuki , Kudo, Mitsuhiro
IPC分类号： G11B5/00 , G11B5/127 , G11B5/48
CPC分类号： G11B5/1875 , G11B5/1274

10. 发明公开

EP0159039A3 Magnetic recording and reproducing system with composite magnetic head 失效
标题翻译：具有复合磁头的磁记录和再现系统
公开(公告)号：EP0159039A3
公开(公告)日：1988-01-07
申请号：EP85104722
申请日：1985-04-18
申请人： HITACHI, LTD.
发明人： Otomo, Shigekazu , Kumasaka, Noriyuki , Yamashita, Takeo , Morikawa, Juichi , Kobayashi, Takayuki , Kudo, Mitsuhiro
IPC分类号： G11B05/00 , G11B05/127 , G11B05/48
CPC分类号： G11B5/1875 , G11B5/1274
摘要： @ A magnetic recording and reproducing system uses a composite magnetic head whose surface (6) facing a magnetic recording medium is composed primarily of a ferromagnetic metal (4) and a high permeability ferrite single crystal (3), and which has a region close to a gap (7) and composed of the ferromagnetic metal (4). The magnetic head is arranged in such a fashion that the {710} plane of the ferrite single crystal (3) substantially coincides with a plane (8) forming a principal magnetic circuit of the magnetic head, that the direction lying inside the {110} plane is inclined at an angle of 15° to 75° with respect to a direction perpendicular to the surface (6) facing the recording medium, and that the recording medium travels in a direction which is relatively the same as, and parallel to, a vector formed by projecting a vector extending from the inside to the outside of the surface (6) facing the recording medium in the direction, on the surface (6) facing the magnetic recording medium. By this arrangement, the step occurring on the surface (6) facing the recording medium due to wear caused by the travel of the recording medium, and any output deterioration and fluctuation resulting from the step can be remarkably reduced.

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