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1.发明公开Thin film magnetic heads, their manufacture and magnetic information storage apparatus including them 失效薄膜磁头，他们的制造和磁信息存储设备，包括它们
公开(公告)号：EP0389143A3
公开(公告)日：1993-07-14
申请号：EP90302412.3
申请日：1990-03-07
申请人： HITACHI, LTD.
发明人： Kawabe, Takashi , Fuyama, Moriaki , Narishige, Shinji , Ashida, Eizi , Morijiri, Makoto , Tanabe, Masanori , Fukui, Hiroshi , Sugita, Yutaka , Ikeda, Hiroshi , Hayashi, Masaaki , Nakagoshi, Kazuo , Kawakami, Kanji , Saitoh, Yukuo , Kuwatsuka, Shunichiro
CPC分类号： G11B5/3919 , G11B5/012 , G11B5/3116 , G11B5/313 , G11B5/3163 , G11B5/3903 , G11B5/3967
摘要： A magnetic head for reading from and/or writing to a magnetic information storage medium, has a substrate (21) on which a plurality of thin films are formed in sequence. The films provide a magnetic circuit having a magnetic gap (25), a bottom pole piece (22) and a top pole piece (12,15) overlying said bottom pole piece. The top pole piece is formed as a tip portion (12) adjoining the magnetic gap and a rear portion (15) which makes magnetic contact with the tip portion (12). The rear portion (15) is formed in the sequence after the tip portion (12). To ensure accurate thickness and width of the tip portion (12), there is a non-magnetic protective film (13) on the tip portion (12) formed in the sequence after the tip portion (12) and before the rear portion (15).
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2.发明授权Thin film magnetic heads, their manufacture and magnetic information storage apparatus including them 失效薄膜磁头，它们的制备方法和这些头含有磁性信息存储装置
公开(公告)号：EP0389143B1
公开(公告)日：1997-06-11
申请号：EP90302412.3
申请日：1990-03-07
申请人： HITACHI, LTD.
发明人： Kawabe, Takashi , Fuyama, Moriaki , Narishige, Shinji , Ashida, Eizi , Morijiri, Makoto , Tanabe, Masanori , Fukui, Hiroshi , Sugita, Yutaka , Ikeda, Hiroshi , Hayashi, Masaaki , Nakagoshi, Kazuo , Kawakami, Kanji , Saitoh, Yukuo , Kuwatsuka, Shunichiro
CPC分类号： G11B5/3919 , G11B5/012 , G11B5/3116 , G11B5/313 , G11B5/3163 , G11B5/3903 , G11B5/3967
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3.发明公开Thin film magnetic heads, their manufacture and magnetic information storage apparatus including them 失效薄膜磁头，它们的制备方法和含有磁性信息存储装置这些头。
公开(公告)号：EP0389143A2
公开(公告)日：1990-09-26
申请号：EP90302412.3
申请日：1990-03-07
申请人： HITACHI, LTD.
发明人： Kawabe, Takashi , Fuyama, Moriaki , Narishige, Shinji , Ashida, Eizi , Morijiri, Makoto , Tanabe, Masanori , Fukui, Hiroshi , Sugita, Yutaka , Ikeda, Hiroshi , Hayashi, Masaaki , Nakagoshi, Kazuo , Kawakami, Kanji , Saitoh, Yukuo , Kuwatsuka, Shunichiro
CPC分类号： G11B5/3919 , G11B5/012 , G11B5/3116 , G11B5/313 , G11B5/3163 , G11B5/3903 , G11B5/3967
摘要： A magnetic head for reading from and/or writing to a magnetic information storage medium, has a substrate (21) on which a plurality of thin films are formed in sequence. The films provide a magnetic circuit having a magnetic gap (25), a bottom pole piece (22) and a top pole piece (12,15) overlying said bottom pole piece. The top pole piece is formed as a tip portion (12) adjoining the magnetic gap and a rear portion (15) which makes magnetic contact with the tip portion (12). The rear portion (15) is formed in the sequence after the tip portion (12). To ensure accurate thickness and width of the tip portion (12), there is a non-magnetic protective film (13) on the tip portion (12) formed in the sequence after the tip portion (12) and before the rear portion (15).
摘要翻译： 一种磁头用于读和/或写磁信息存储介质，具有在其上的薄膜中的多个序列中形成一个基板（21）。 该膜提供具有磁隙（25），一个底极件（22）和顶部极件（12,15）覆盖所述底极件的磁路。 顶部极件被形成为邻接所述磁隙的端头部分（12）并且使得与顶端部分（12）磁性接触的后部部分（15）。 后部（15）的尖端部分（12）之后的序列中形成。 为了确保准确的厚度和末端部分（12）的宽度，则在尖端部分（12）后的序列中所形成的顶端部分（12）的非磁性保护膜（13）和后部部分之前（15 ）。
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