发明名称 |
Magnetic head having separated upper magnetic cores for avoiding magnetic saturation and manufacturing method of same |
摘要 |
An inductive magnetic head used for high-density recording having such a construction that prevents magnetic leakage near a magnetic pole at the tip of the magnetic core and reduces magnetic resistance or reluctance at an upper magnetic core front portion is disclosed. An upper magnetic core facing a lower magnetic core with a non-magnetic gap layer interposed therebetween comprises an upper magnetic core front portion near a magnetic pole, and an upper magnetic core rear portion at the rear portion. The front portion has a parallel portion having a width almost equal to the track width extending from the magnetic pole toward the rear end of the front portion, and a sector at the rear of an apex. The front portion has a nonmagnetic gap with the lower magnetic core at an area between the magnetic pole and the apex, and the gap between the front portion and the lower magnetic core is wider than the magnetic gap at the rear of the apex. The tip portion of the upper magnetic core rear portion is overlapped and connected to the upper magnetic core front portion on the medium-facing surface side of the apex, extending therefrom to the upper part of a coil and a coil insulating layer.
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申请公布号 |
US2001015872(A1) |
申请公布日期 |
2001.08.23 |
申请号 |
US20010764351 |
申请日期 |
2001.01.19 |
申请人 |
MEGURO SATOSHI;FUJII SHIGEO;MIMA HIROYUKI;IFUKA TOSHIHIRO |
发明人 |
MEGURO SATOSHI;FUJII SHIGEO;MIMA HIROYUKI;IFUKA TOSHIHIRO |
分类号 |
G11B5/31;G11B5/39;(IPC1-7):G11B5/31 |
主分类号 |
G11B5/31 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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