公开(公告)号：EP0851411A3

公开(公告)日：1998-09-16

申请号：EP97122699.8

申请日：1997-12-22

申请人： Hitachi, Ltd.

发明人： Komuro, Matahiro ,  Okada, Tomohiro ,  Sano, Masaaki ,  Fuyama, Moriaki ,  Fukui, Hiroshi ,  Hoshino, Katsumi ,  Kawabe, Takashi ,  Maruyama, Yohji ,  Nakamura, Atsushi ,  Hara, Miki ,  Shimizu, Noboru ,  Yoshida, Nobuo

IPC分类号： G11B5/31

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3123 ,  G11B5/3967 ,  G11B2005/3996

摘要： In order to prevent the recording performance from degradation in radio frequency recording, there are provided a film magnetic head and a recording reproducing sectional pattern magnetic head which has magnetic pole width less than 2 µm and a ultra high density magnetic storage apparatus of 10 Gb/in 2 grade. In the recording head, a lower part magnetic film serves as a shielding film of a reproducing department. A gap film of a non-magnetism is formed during the formation of the upper and lower part magnetic films. One part of the lower or upper part magnetic film has a resistivity higher by more than 80 µΩcm than other parts. The upper part magnetic film is formed by a flame galvanising. A gap department of the lower or upper part magnetic film is shaped convex.

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

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39

CPC分类号： G11B5/3919 ,  G11B5/012 ,  G11B5/3116 ,  G11B5/313 ,  G11B5/3163 ,  G11B5/3903 ,  G11B5/3967

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

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39

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 ）。

公开(公告)号：EP0851411A2

公开(公告)日：1998-07-01

申请号：EP97122699.8

申请日：1997-12-22

申请人： Hitachi, Ltd.

发明人： Komuro, Matahiro ,  Okada, Tomohiro ,  Sano, Masaaki ,  Fuyama, Moriaki ,  Fukui, Hiroshi ,  Hoshino, Katsumi ,  Kawabe, Takashi ,  Maruyama, Yohji ,  Nakamura, Atsushi ,  Hara, Miki ,  Shimizu, Noboru ,  Yoshida, Nobuo

IPC分类号： G11B5/31

CPC分类号： B82Y25/00 ,  B82Y10/00 ,  G11B5/3116 ,  G11B5/312 ,  G11B5/3123 ,  G11B5/3967 ,  G11B2005/3996

摘要： In order to prevent the recording performance from degradation in radio frequency recording, there are provided a film magnetic head and a recording reproducing sectional pattern magnetic head which has magnetic pole width less than 2 µm and a ultra high density magnetic storage apparatus of 10 Gb/in 2 grade. In the recording head, a lower part magnetic film serves as a shielding film of a reproducing department. A gap film of a non-magnetism is formed during the formation of the upper and lower part magnetic films. One part of the lower or upper part magnetic film has a resistivity higher by more than 80 µΩcm than other parts. The upper part magnetic film is formed by a flame galvanising. A gap department of the lower or upper part magnetic film is shaped convex.

摘要翻译： 为了防止射频记录中的记录性能下降，提供了一种磁极宽度小于2μm的薄膜磁头和记录再现截面图案磁头，以及一种10Gb / s的超高密度磁存储装置， in2等级。 在记录头中，下部磁性膜用作再现部的屏蔽膜。 在形成上部和下部磁性膜的过程中形成非磁性的间隙膜。 下部或上部磁性膜的一部分比其他部分的电阻率高80μΩcm以上。 上部磁性膜通过火焰镀锌形成。 下部或上部磁性膜的间隙部分呈凸形。

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

IPC分类号： G11B5/00 ,  G11B5/012 ,  G11B5/31 ,  G11B5/39

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).