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公开(公告)号：US5099376A
公开(公告)日：1992-03-24
申请号：US650814
申请日：1991-01-31
申请人： Kazuo Ino , Yoshiaki Shimizu , Hiroyuki Okuda , Kousou Ishihara , Takashi Ogura
发明人： Kazuo Ino , Yoshiaki Shimizu , Hiroyuki Okuda , Kousou Ishihara , Takashi Ogura
CPC分类号： G11B5/127 , G11B5/1871 , Y10T29/49046 , Y10T29/49057 , Y10T29/49067
摘要： A magnetic head comprises a pair of magnetic core halves (1a, 1b), which are abutted with each other through a nonmagnetic material to define a magnetic gap (2), and ferromagnetic thin films (3a, 3b). The magnetic core halves (1a, 1b), which are formed of ferromagnetic oxide, have gap forming surfaces to be abutted with each other. The ferromagnetic metal thin films (3a, 3b) are selectively formed on the gap forming surfaces of the pair of magnetic core halves (1a, 1b). A ferromagnetic thin film (3b) is so formed that portion (12b, 12c, 12d) to be provided with a track width regulating groove (13b), a coil groove (13c) or a joining member receiving groove (13d) is exposed within a gap forming surface of one magnetic core half member (7b). Another ferromagnetic thin film (3a) is so formed that, in a gap forming surface of another magnetic core half member (7a), a portion (12e, 12f) opposite to the coil groove (13c) or the joining member receiving groove (13d) to be provided in the gap forming surface of the magnetic core half member (7b) is exposed. These ferromagnetic thin films (3a, 3b) are selectively formed by ion beam etching. Grooves (13b, 13c, 13d) are provided in one magnetic core half (1b) by mechanical working through a dicing saw or the like.
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公开(公告)号：US4953049A
公开(公告)日：1990-08-28
申请号：US218018
申请日：1988-07-12
申请人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
发明人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
CPC分类号： G11B5/1874 , G11B5/1878
摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.
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公开(公告)号：US5278716A
公开(公告)日：1994-01-11
申请号：US974757
申请日：1992-11-12
申请人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
发明人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.
摘要翻译： 磁头包括一对磁芯半部，耐热薄膜和铁磁性薄膜，一对磁芯半部通过非磁性材料如SiO 2彼此相对以形成磁隙。 磁芯半部由诸如铁氧体的铁磁性氧化物制成，并且具有彼此相对的间隙形成面以形成磁隙。 通过磷酸溶液蚀刻间隙形成面，然后通过反溅射进行纯化，使得在间隙形成面上暴露铁磁性氧化物的生长晶体。 在每个间隙形成面上形成耐热材料如SiO 2的耐热薄膜。 在每个耐热薄膜上形成铁硬金属材料如铁硅铝铁合金的铁磁薄膜。 优选地，要形成的耐热薄膜的厚度为磁隙宽度的1nm以上且十分之一以下。 例如，由于在各SiO 2膜上形成强磁性金属薄膜，所以在3（μm）m的间隙形成面和厚度为3μm的厚度的薄膜上，形成5nm厚的SiO 2膜。 在这种情况下，磁隙的间隙长度设定为0.2（my）m。
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公开(公告)号：US5195004A
公开(公告)日：1993-03-16
申请号：US826192
申请日：1992-01-21
申请人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
发明人： Hiroyuki Okuda , Yoshiaki Shimizu , Kazuo Ino , Kousou Ishihara , Takashi Ogura
IPC分类号： G11B5/187
CPC分类号： G11B5/1874 , G11B5/1878 , Y10T29/49043 , Y10T29/49052 , Y10T29/49067
摘要： A magnetic head comprises a pair of magnetic core halves, heat-resistant thin films and ferromagnetic thin films, the pair of magnetic core halves being opposed to each other through a non-magnetic material such as SiO.sub.2 to form a magnetic gap. The magnetic core halves are made of a ferromagnetic oxide such as ferrite and have gap forming faces to be opposed to each other to form the magnetic gap. The gap forming faces are etched by phosphoric acid solution and then purified by reverse sputtering, so that a grown crystal of the ferromagnetic oxide is exposed on the gap forming faces. A heat-resistant thin film of a heat-resistant material such as SiO.sub.2 is formed on each of the gap forming faces. A ferromagnetic thin film of a ferromagnetic metal material such as sendust is formed on each heat-resistant thin film. Preferably, the thickness of the heat-resistant thin film to be formed is 1 nm or more and one tenth or less of the width of the magnetic gap. For example, SiO.sub.2 films of 5 nm in thickness as the heat-resistant thin films are formed on the respective gap forming faces and sendust films of 3 .mu.m in thickness as the ferromagnetic metal thin films are formed on the respective SiO.sub.2 films. In this case, the gap length of the magnetic gap is set to 0.2 .mu.m.
摘要翻译： 磁头包括一对磁芯半部，耐热薄膜和铁磁性薄膜，一对磁芯半部通过非磁性材料如SiO 2彼此相对以形成磁隙。 磁芯半部由诸如铁氧体的铁磁性氧化物制成，并且具有彼此相对的间隙形成面以形成磁隙。 通过磷酸溶液蚀刻间隙形成面，然后通过反溅射进行纯化，使得在间隙形成面上暴露铁磁性氧化物的生长晶体。 在每个间隙形成面上形成耐热材料如SiO 2的耐热薄膜。 在每个耐热薄膜上形成铁硬金属材料如铁硅铝铁合金的铁磁薄膜。 优选地，要形成的耐热薄膜的厚度为磁隙宽度的1nm以上且十分之一以下。 例如，在相应的SiO 2膜上形成强磁性金属薄膜的情况下，在厚度为3μm的各个间隙形成面和厚度厚度的薄膜上形成5nm厚的作为耐热薄膜的SiO 2膜。 在这种情况下，磁隙的间隙长度设定为0.2μm。
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公开(公告)号：US5007158A
公开(公告)日：1991-04-16
申请号：US307654
申请日：1989-02-08
申请人： Kazuo Ino , Yoshiaki Shimizu , Hiroyuki Okuda , Kousou Ishihara , Takashi Ogura
发明人： Kazuo Ino , Yoshiaki Shimizu , Hiroyuki Okuda , Kousou Ishihara , Takashi Ogura
CPC分类号： G11B5/127 , G11B5/1871 , Y10T29/49046 , Y10T29/49057 , Y10T29/49067
摘要： A magnetic head comprises a pair of magnetic core halves (1a, 1b), which are abutted with each other through a nonmagnetic material to define a magnetic gap (2), and ferromagnetic thin films (3a, 3b). The magnetic core halves (1a, 1b), which are formed of ferromagnetic oxide, have gap forming surfaces to be abutted with each other. The ferromagnetic metal thin films (3a, 3b) are selectively formed on the gap forming surfaces of the pair of magnetic core halves (1a, 1b). A ferromagnetic thin film (3b) is so formed that portion (12b, 12c, 12d) to be provided with a track width regulating groove (13b), a coil groove (13c) or a joining member receiving groove (13d) is exposed within a gap forming surface of one magnetic core half member (7b). Another ferromagnetic thin film (3a) is so formed that, in a gap forming surface of another magnetic core half member (7a), a portion (12e, 12f) opposite to the coil groove (13c) or the joining member receiving groove (13d) to be provided in the gap forming surface of the magnetic core half member (7b) is exposed. These ferromagnetic thin films (3a, 3b) are selectively formed by ion means beam etching. Grooves (13b, 13c, 13d) are provided in one magnetic core half (1b) by mechanical working through a dicing saw or the like.
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公开(公告)号：US5768072A
公开(公告)日：1998-06-16
申请号：US663841
申请日：1996-06-14
申请人： Yutaka Ueta , Hiroyuki Ohno , Takao Yamano , Kiyotaka Itou , Kousou Ishihara , Kazuhiro Koga , Yoshifumi Fukumoto , Atsushi Furuzawa , Takahiro Ogawa , Hiroyuki Okuda , Toshinori Urano
发明人： Yutaka Ueta , Hiroyuki Ohno , Takao Yamano , Kiyotaka Itou , Kousou Ishihara , Kazuhiro Koga , Yoshifumi Fukumoto , Atsushi Furuzawa , Takahiro Ogawa , Hiroyuki Okuda , Toshinori Urano
CPC分类号： G11B5/1276 , G11B5/1878 , G11B5/232
摘要： A magnetic head comprises a first abutting segment formed with a winding groove having an open side, and a second abutting segment opposed to the open side of the groove and joined to the first segment. The first abutting segment comprises a first core segment having the groove, and gap spacers and second ferromagnetic thin films formed on the surface thereof opposed to the second segment and positioned above and below the groove. The first core segment comprises a core segment member made of a ferromagnetic material, formed with the groove and having a first ferromagnetic thin film which is formed on the surface thereof opposed to the second abutting segment and which is positioned toward the face of the head to be opposed to recording media. The second abutting segment has a face to be opposed to the recording medium and formed by a nonmagnetic material.
摘要翻译： 磁头包括形成有具有开口侧的卷绕槽的第一邻接部分和与凹槽的敞开侧相对并连接到第一部分的第二邻接部分。 第一邻接部分包括具有凹槽的第一芯部段和形成在其与第二部分相对并且位于沟槽上方和下方的表面上的间隔间隔物和第二铁磁性薄膜。 第一芯部段包括由铁磁材料制成的芯部分部件，其形成有沟槽并且具有第一铁磁性薄膜，该第一铁磁性薄膜形成在与第二抵接部分相对的表面上并且朝向头部的表面定位 反对记录媒体。 第二邻接部分具有与记录介质相对并由非磁性材料形成的面。
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