发明授权
- 专利标题: Magnetic head having a single-crystal ferrite core
- 专利标题(中): 具有单晶铁素体磁芯的磁头
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申请号: US813751申请日: 1991-12-31
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公开(公告)号: US5218500A公开(公告)日: 1993-06-08
- 发明人: Hiroyuki Okuda , Isao Tanaka , Jyoichi Tamada , Kazuo Ino , Takashi Ogura , Fumio Kameoka , Kouzo Ishihara
- 申请人: Hiroyuki Okuda , Isao Tanaka , Jyoichi Tamada , Kazuo Ino , Takashi Ogura , Fumio Kameoka , Kouzo Ishihara
- 申请人地址: JPX Osaka
- 专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人: Sanyo Electric Co., Ltd.
- 当前专利权人地址: JPX Osaka
- 优先权: JPX3-587 19910108; JPX3-79898 19910412; JPX3-257974 19911004
- 主分类号: G11B5/187
- IPC分类号: G11B5/187
摘要:
With a view to solving the problem of "pseudo-gap" in a parallel type MIG head and to improving its reproduction output, effective combinations of the principal magnetic path forming face and the gap-forming face were determined empirically for the case of using a single-crystal ferrite core material. The improved magnetic head comprises a pair of magnetic core halves made of a single-crystal ferrite, at least one of said magnetic core halves having a thin ferromagnetic metal film formed on the gap-forming face, and said thin ferromagnetic metal film abutting against the other magnetic core half with a non-magnetic material being interposed to form a magnetic gap, the improvement wherein the principal magnetic path forming face of the magnetic core half provided with said thin ferromagnetic metal film has a crystal plane generally designated {211} whereas a vector A that is parallel to the crystal axis in said principal magnetic path forming face and that is directed away from the gap-forming face forms an angle .theta. of the range 0.degree.-60.degree. or 150.degree.-180.degree. with a vector B that is parallel to the intersection of the principal magnetic path forming face and the gap-forming face and that approaches the face opposite to a recording medium.
公开/授权文献
- US6078601A Method for controlling the operation of a laser 公开/授权日:2000-06-20
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