公开(公告)号：EP1223573A1

公开(公告)日：2002-07-17

申请号：EP00964764.5

申请日：2000-10-10

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： HASEGAWA, Kenji ,  MURAOKA, Shunsaku ,  NATSUI, Akinaga ,  OSANO, Koichi ,  TAKAHASHI, Ken

IPC分类号： G11B5/147 ,  G11B5/187 ,  G11B5/127

CPC分类号： G11B5/537 ,  G11B5/0086 ,  G11B5/105 ,  G11B5/133 ,  G11B5/147 ,  G11B5/1475 ,  G11B5/255 ,  G11B5/53 ,  G11B15/61 ,  G11B15/62

摘要： A magnetic head that is less prone to wear and has a long still duration and a magnetic recording/reproducing apparatus including a high-speed rotary drum unit using the same are provided. Thus, in a magnetic head including two magnetic core halves 4 and 8, each including at least one magnetic film 2, 6 made of a soft magnetic metallic material and a pair of substrates 1, 3 and 5, 7 sandwiching the magnetic film, arranged so that end faces thereof oppose each other with a magnetic gap 9 being formed therebetween to form a magnetic path by the magnetic film in each of the magnetic core halves, at least a part of a sliding surface of each substrate with respect to a magnetic tape is made of a non-magnetic single crystal ferrite material and a crystal face orientation of the non-magnetic single crystal ferrite material at the sliding surface is set to be approximately {110} while a direction of the non-magnetic single crystal ferrite material is approximately in parallel with a sliding direction of the magnetic head with respect to the magnetic tape.

摘要翻译： 提供一种不容易磨损并且具有长持续时间的磁头和包括使用其的高速旋转鼓单元的磁记录/再现装置。 因此，在包括两个磁芯半体4和8的磁头中，每个包括至少一个由软磁性金属材料制成的磁膜2,6和夹着磁性膜的一对基板1,3,5,7布置 使得其端面彼此相对，其间形成有磁隙9，以通过每个磁芯半部中的磁性膜形成磁路，每个基板的滑动表面的至少一部分相对于磁带 由非磁性单晶铁氧体材料制成，并且非磁性单晶铁氧体材料在滑动表面处的晶面取向设定为大约ä110ü，而非磁性单晶铁氧体材料的<110>方向 大致与磁头相对于磁带的滑动方向平行。

公开(公告)号：EP0400966B1

公开(公告)日：1995-02-15

申请号：EP90305833.7

申请日：1990-05-29

申请人： SHARP KABUSHIKI KAISHA

发明人： Michijima, Masashi ,  Kadono, Masaru ,  Yamamoto, Tatsushi

IPC分类号： G11B5/147 ,  G11B5/187 ,  G11B5/31

CPC分类号： G11B5/3103 ,  G11B5/1475 ,  G11B5/1878 ,  G11B5/3163 ,  Y10T29/49043 ,  Y10T29/49048 ,  Y10T29/49057 ,  Y10T29/49067

公开(公告)号：EP0509461A2

公开(公告)日：1992-10-21

申请号：EP92106455.6

申请日：1992-04-14

申请人： SHARP KABUSHIKI KAISHA

发明人： Yamamoto, Tatsuhi

IPC分类号： G11B5/147

CPC分类号： G11B5/1272 ,  G11B5/1475 ,  G11B5/1871 ,  G11B5/3103 ,  Y10T29/49057

摘要： A magnetic head (1) includes two substrates (7) which are provided with magnetic cores (3) of magnetic film on their surface and are bonded on a plane so that a magnetic gap (5) is defined between the magnetic cores, an edge part of the magnetic cores with the magnetic gap (5) facing to a track of a recording medium being thinned from opposite sides thereof, and the magnetic cores (3) in any other part being thicker than the edge part. In a gap facing plane where a pair of the magnetic cores (3) join together, the magnetic cores are registered with each other so that they can be opposed to each other in a larger width in the back gap than in the front gap. As a result, even if a tolerance of a process in manufacturing is considerably loosened, a magnetic head (1) with high core efficiency can be obtained with a high yield.

摘要翻译： 磁头（1）包括两个基片（7），它们在其表面上设置有磁性薄膜的磁芯（3），并结合在一个平面上，从而在磁芯之间形成一个磁隙（5） 具有磁隙（5）的磁芯的一部分与记录介质的轨道相对侧变薄，并且任何其它部分中的磁芯（3）比边缘部分厚。 在一对磁芯（3）接合在一起的间隙面对面中，磁芯彼此对准，使得它们可以在后间隙中比在前间隙中更大的宽度彼此相对。 结果，即使在制造过程中的公差相当松动，可以以高产率获得高效率的磁头（1）。

公开(公告)号：EP0171725B1

公开(公告)日：1990-10-24

申请号：EP85109789.9

申请日：1985-08-05

申请人： SANYO ELECTRIC CO., LTD.

发明人： Yasuda, Isao ,  Yoshisato, Yorinobu ,  Yoshikawa, Hideki ,  Taketa, Kazuhiko

IPC分类号： G11B5/29

CPC分类号： G11B5/1475 ,  G11B5/29 ,  Y10T29/49048 ,  Y10T29/49057 ,  Y10T29/49792

公开(公告)号：EP0204361B1

公开(公告)日：1990-02-28

申请号：EP86200855.4

申请日：1986-05-20

申请人： Philips Electronics N.V.

发明人： Verbunt, Johannes Petrus Maria

IPC分类号： H01F1/18

CPC分类号： H01F1/15383 ,  G11B5/10 ,  G11B5/1475 ,  Y10S428/90 ,  Y10T428/1193 ,  Y10T428/31515

公开(公告)号：EP0191447A3

公开(公告)日：1988-12-14

申请号：EP86101672

申请日：1986-02-10

申请人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.

发明人： Satomi, Mitsuo ,  Hirota, Ken ,  Inoue, Osamu

IPC分类号： G11B05/21 ,  G11B05/235 ,  G11B05/147

CPC分类号： G11B5/21 ,  G11B5/1475

摘要： Tape contact surface of magnetic head is made of magnetic substance of multi-layered structure; interface insulation material for said multi layered structure and/or gap spacer material are made of oxide, complex oxide, nitride and carbide of transition metal elements, lla group elements of periodic table and Zn; and accumulation of magnetic material in magnet tape is prevented and output of magnetic head is stabilized.

摘要翻译： 磁头的磁带接触表面由多层结构的磁性物质制成; 所述多层结构和/或间隙间隔物材料的界面绝缘材料由过渡金属元素的氧化物，复合氧化物，氮化物和碳化物，元素周期表的IIa族元素和Zn制成; 并且防止了磁性材料在磁带中的积聚并且磁头的输出稳定。

公开(公告)号：EP0177964A3

公开(公告)日：1987-08-12

申请号：EP85112869

申请日：1985-10-10

申请人： SONY CORPORATION

发明人： Yamaguchi, Takashi ,  Nagasawa, Naomi ,  Tamura, Hidemasa

IPC分类号： C04B35/00 ,  G11B05/31 ,  G11B05/147

CPC分类号： C04B35/495 ,  G11B5/1475 ,  G11B5/31 ,  G11B5/3109 ,  Y10S428/90 ,  Y10T428/1157 ,  Y10T428/24281

摘要： A ceramic composition particularly useful for use in thin film magnetic heads, the composition having the general formula:
wherein the ratio x/y is at least 0.74 but less than 1.00, the composition having a coefficient of thermal expansion closely matching that of the magnetic alloy film with which it is used so as to prevent separation of the two upon changes in temperature.

公开(公告)号：EP0177964A2

公开(公告)日：1986-04-16

申请号：EP85112869.4

申请日：1985-10-10

申请人： SONY CORPORATION

发明人： Yamaguchi, Takashi ,  Nagasawa, Naomi ,  Tamura, Hidemasa

IPC分类号： C04B35/00 ,  G11B5/31 ,  G11B5/147

CPC分类号： C04B35/495 ,  G11B5/1475 ,  G11B5/31 ,  G11B5/3109 ,  Y10S428/90 ,  Y10T428/1157 ,  Y10T428/24281

摘要： A ceramic composition particularly useful for use in thin film magnetic heads, the composition having the general formula:
wherein the ratio x/y is at least 0.74 but less than 1.00, the composition having a coefficient of thermal expansion closely matching that of the magnetic alloy film with which it is used so as to prevent separation of the two upon changes in temperature.

公开(公告)号：EP0105720A2

公开(公告)日：1984-04-18

申请号：EP83305851.4

申请日：1983-09-28

申请人： AMPEX CORPORATION

发明人： Latimer, Stanley M. ,  Orton, Gregory A.

IPC分类号： G11B5/127 ,  G11B5/147 ,  G11B5/29 ,  G11B5/265

CPC分类号： G11B5/232 ,  G11B5/105 ,  G11B5/1272 ,  G11B5/1475 ,  G11B5/2651 ,  G11B5/295 ,  Y10T29/49055

摘要： A magnetic transducer assembly having separate core portions (12, 13) with keyways (17,18) provided therein. The core portions are assembled to form a substantially closed magnetic circuit defining a transducing gap (35). The keyways form recesses which are contiguous with a transducer inner space provided by the assembled cores. The inner space and recesses are filled with a nonmagnetic bonding material. The resulting bond improves the mechanical coupling between the core portions.

公开(公告)号：EP0709828B1

公开(公告)日：2001-08-01

申请号：EP95917519.1

申请日：1995-05-09

申请人： SONY CORPORATION

发明人： SHOUJI, Mitsuharu Sony Corporation ,  OHMORI, Hiroyuki Sony Corporation ,  SUGIYAMA, Yasunari Sony Corporation ,  YAMAMOTO, Tetsuya Sony Corporation

IPC分类号： G11B5/31

CPC分类号： G11B5/3106 ,  G11B5/10 ,  G11B5/1475 ,  G11B5/17 ,  G11B5/3113

摘要： The reliability of a magnetic head is improved by eliminating the need of putting glass, etc., on a magnetic film. A method of manufacturing a magnetic head which has a pair of magnetic core halves in which magnetic films are formed on substrates and which face to each other and a thin film coil is formed on at least one of the mutually facing surfaces of the core halves, comprising the steps of forming recessed portions in the substrates by, say, ion milling, and forming the magnetic films in the recessed sections. It is preferable that the magnetic films each comprise a magnetic film whose axis of easy magnetization is in the direction of the magnetic gap depth and a magnetic film whose axis of easy magnetization is in the direction perpendicular to the depth direction.