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1. 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

2. 发明授权

EP0281931B1 Magnetic head 失效
公开(公告)号：EP0281931B1
公开(公告)日：1993-12-29
申请号：EP88103229.6
申请日：1988-03-03
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Takahashi, Ken , Yohda, Hiroshi
IPC分类号： G11B5/147 , G11B5/31
CPC分类号： G11B5/313 , G11B5/147 , G11B5/3153

3. 发明公开

EP0460702A3 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0460702A3
公开(公告)日：1992-05-20
申请号：EP91109364.9
申请日：1991-06-07
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Mizoh, Yoshiaki , Yohda, Hiroshi
IPC分类号： G11B5/48 , G11B5/53 , G11B5/187
CPC分类号： G11B5/531 , G11B5/187 , G11B5/4893
摘要： A multitrack magnetic head (4) for use with a magnetic tape in a magnetic recording and reproducing system includes at least two magnetic head tips (1,2) disposed adjacent to each other and movable with respect to the magnetic tape. The head tips include a leading head tip (1) for initial sliding contact with the magnetic tape and a trailing head tip (2) for subsequent sliding contact with the magnetic tape. The leading head tip (1) is made of a material whose wear resistance is greater than that of a material of which said trailing head tip (2) is made. The head tips are held in good sliding contact with the magnetic tape for better recording and reproducing characteristics.

4. 发明授权

EP0334512B1 Magnetic head 失效
标题翻译：磁头。
公开(公告)号：EP0334512B1
公开(公告)日：1995-12-06
申请号：EP89302338.2
申请日：1989-03-09
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Yohda, Hiroshi , Inoue, Yasushi
IPC分类号： G11B5/11 , G11B5/147
CPC分类号： G11B5/1475 , G11B5/11

5. 发明公开

EP0281931A3 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0281931A3
公开(公告)日：1990-11-28
申请号：EP88103229.6
申请日：1988-03-03
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Takahashi, Ken , Yohda, Hiroshi
IPC分类号： G11B5/147 , G11B5/31
CPC分类号： G11B5/313 , G11B5/147 , G11B5/3153
摘要： The disclosure relates to a magnetic head having a recording capacity for sufficiently deriving performance of a high coercive magnetic tape and capable of recording and reproducing signals of very high frequencies at high efficiency. The magnetic head of the present invention includes ferromagnetic thin films and insulative thin films alternately laminated one upon another to form a multi-layered film magnetic core which constitutes part of whole of magnetic path, with the ferromagnetic thin films being so arranged that directions of their anisotropy are different from each other, and thus, Snoek's limit due to ferromagnetic resonance is broken through for making it possible to record and reproduce signals in an efficient manner up to high frequency band regions.

6. 发明公开

EP0334512A3 Magnetic head 失效
标题翻译：磁头
公开(公告)号：EP0334512A3
公开(公告)日：1990-04-25
申请号：EP89302338.2
申请日：1989-03-09
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Yohda, Hiroshi , Inoue, Yasushi
IPC分类号： G11B5/11 , G11B5/147
CPC分类号： G11B5/1475 , G11B5/11
摘要： In a ring-shaped magnetic head in a sandwich structure of magnetic cores with nonmagnetic substrates, by achieving electric conductance between a pair of opposing magnetic cores, electrostatic noise generated due to sliding of the recording medium can be prevented without grounding the cores themselves. If mounted on an insulating head base, conductor for grounding is not needed. Besides, the head chip can be manufactured in a few manufacturing steps by the processing to achieve conductance between magnetic cores in a state of core block composed of plural head chips when manufacturing a magnetic head.
摘要翻译：在具有非磁性基板的磁芯的夹层结构中的环形磁头中，通过实现一对相对的磁芯之间的导电性，可以防止由于记录介质的滑动而产生的静电噪声，而不会使芯本身接地。如果安装在绝缘基座上，则不需要用于接地的导体。此外，在制造磁头时，可以在几个制造步骤中通过处理来制造头芯片，以在由多个头芯片构成的芯块的状态下实现磁芯之间的电导。

7. 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.

8. 发明公开

EP0334512A2 Magnetic head 失效
标题翻译： Magnetkopf。
公开(公告)号：EP0334512A2
公开(公告)日：1989-09-27
申请号：EP89302338.2
申请日：1989-03-09
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Yohda, Hiroshi , Inoue, Yasushi
IPC分类号： G11B5/11 , G11B5/147
CPC分类号： G11B5/1475 , G11B5/11
摘要： In a ring-shaped magnetic head in a sandwich structure of magnetic cores with nonmagnetic substrates, by achieving electric conductance between a pair of opposing magnetic cores, electrostatic noise generated due to sliding of the recording medium can be prevented without grounding the cores themselves. If mounted on an insulating head base, conductor for grounding is not needed. Besides, the head chip can be manufactured in a few manufacturing steps by the processing to achieve conductance between magnetic cores in a state of core block composed of plural head chips when manufacturing a magnetic head.
摘要翻译：在具有非磁性基板的磁芯的夹层结构的环形磁头中，通过实现一对相对的磁芯之间的电导，可以防止由于记录介质的滑动而产生的静电噪声而不使磁芯本身接地。如果安装在绝缘头基座上，则不需要用于接地的导体。此外，通过在制造磁头时通过处理以在由多个头芯片组成的芯块的状态下实现磁芯之间的电导的处理，可以在几个制造步骤中制造头芯片。

9. 发明公开

EP0281931A2 Magnetic head 失效
标题翻译： Magnetkopf。
公开(公告)号：EP0281931A2
公开(公告)日：1988-09-14
申请号：EP88103229.6
申请日：1988-03-03
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Takahashi, Ken , Yohda, Hiroshi
IPC分类号： G11B5/147 , G11B5/31
CPC分类号： G11B5/313 , G11B5/147 , G11B5/3153
摘要： The disclosure relates to a magnetic head having a recording capacity for sufficiently deriving performance of a high coercive magnetic tape and capable of recording and reproducing signals of very high frequencies at high efficiency. The magnetic head of the present invention includes ferromagnetic thin films and insulative thin films alternately laminated one upon another to form a multi-layered film magnetic core which constitutes part of whole of magnetic path, with the ferromagnetic thin films being so arranged that directions of their anisotropy are different from each other, and thus, Snoek's limit due to ferromagnetic resonance is broken through for making it possible to record and reproduce signals in an efficient manner up to high frequency band regions.
摘要翻译：本公开涉及具有用于充分获得高矫顽磁带的性能的记录能力并且能够以高效率记录和再现非常高频率的信号的磁头。本发明的磁头包括铁磁薄膜和绝缘薄膜，它们彼此交替层叠以形成构成整个磁路的一部分的多层膜磁芯，铁磁性薄膜被布置为使得它们的方向各向异性彼此不同，因此，由于铁磁共振引起的Snoek限制被破坏，使得有可能以高效率的方式记录和再现信号到高频带区域。

10. 发明授权

EP0460702B1 Magnetic head 失效
公开(公告)号：EP0460702B1
公开(公告)日：1996-04-03
申请号：EP91109364.9
申请日：1991-06-07
申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
发明人： Mizoh, Yoshiaki , Yohda, Hiroshi
IPC分类号： G11B5/48 , G11B5/53 , G11B5/187
CPC分类号： G11B5/531 , G11B5/187 , G11B5/4893

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