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1. 发明授权

US06538847B2 Magnetic head having separated upper magnetic cores for avoiding magnetic saturation and manufacturing method of same 有权
标题翻译：具有分离的上磁心以避免磁饱和的磁头及其制造方法
公开(公告)号：US06538847B2
公开(公告)日：2003-03-25
申请号：US09764351
申请日：2001-01-19
申请人： Satoshi Meguro , Shigeo Fujii , Hiroyuki Mima , Toshihiro Ifuka
发明人： Satoshi Meguro , Shigeo Fujii , Hiroyuki Mima , Toshihiro Ifuka
IPC分类号： G11B5147
CPC分类号： B82Y10/00 , G11B5/3116 , G11B5/312 , G11B5/313 , G11B5/3163 , G11B5/3967
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 non-magnetic 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.
摘要翻译：公开了一种用于高密度记录的感应磁头，其具有防止在磁芯顶端附近的磁极附近的磁泄漏并降低上磁芯前部的磁阻或磁阻的结构。面对具有介于其间的非磁隙层的下磁芯的上磁芯包括在磁极附近的上磁芯前部和在后部的上磁芯后部。前部具有平行部分，该平行部分的宽度几乎等于从磁极向前部的后端延伸的轨道宽度，以及在顶点后部的扇形部分。前部在磁极和顶点之间的区域处具有与下磁芯的非磁性间隙，并且前部和下磁芯之间的间隙比顶点后部的磁隙宽。上部磁芯后部的前端部与顶点的面向中间的表面侧的上部磁芯前部重叠并连接，从而向上延伸到线圈的上部和线圈绝缘层。

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