发明授权
- 专利标题： Magnetic head having an integrated recording and playback head and an erasure head
- 专利标题（中）： 具有集成的记录和回放头和擦除头的磁头
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申请号： US694386申请日： 1984-12-04
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公开(公告)号： US4774616A公开(公告)日： 1988-09-27
- 发明人: Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
- 申请人： Noriyuki Kumasaka , Hideo Fujiwara , Shigekazu Otomo , Takeo Yamashita , Noritoshi Saito , Mitsuhiro Kudo
- 申请人地址： JPX Tokyo
- 专利权人： Hitachi, Ltd.
- 当前专利权人： Hitachi, Ltd.
- 当前专利权人地址： JPX Tokyo
- 优先权： JPX58-57816 19830404
- 主分类号： G11B5/31
- IPC分类号： G11B5/31 ; G11B5/265 ; G11B5/16 ; G11B5/22
摘要：
The present invention relates to a magnetic head, which can form guard bands on a magnetic recording medium and which is especially suitable for magnetic discs, and a fabrication process thereof. The magnetic core of the present invention includes a recording and reproduction head core (31) and an erasure head core (32) which is integrally joined in series to the head core (31) for forming guard bands. Magnetic circuits are constructed of metallic magnetic materials (34), (34'), (35) and (35') formed on non-magnetic members (33) and (33'). As a result, a recording medium having high coercive forces can be recorded while the track width is reduced and the fabrication is facilitated with a high accuracy.
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