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1. 发明专利

JPS6199913A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS6199913A
公开(公告)日：1986-05-19
申请号：JP19487484
申请日：1984-09-19
申请人： Hitachi Ltd , Hitachi Maxell Ltd
发明人： INAGOYA OSAMU , FUJIWARA HIDEO , YAMANO MINORU , TOTTORI TAKESHI , KUMASAKA TAKAYUKI , OTOMO MOICHI , KUDO SANEHIRO , MORIKAWA JUICHI
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23 , G11B5/245 , G11B5/265 , G11B5/31
CPC分类号： G11B5/3103 , G11B5/127 , G11B5/1878
摘要： PURPOSE:To improve the magnetic characteristic by constituting a core base part and a magnetic thin film stuck to its surface so that the minimum value of the sum total of the product of a sectional area except a magnetic gap part of a magnetic path and a saturation magnetic flux density exceeds the product of the magnetic thin film and the saturation magnetic flux density. CONSTITUTION:In a magnetic path except a magnetic gap opposed surface in the first core half body 24, the sum total of the product of a sectional area roughly vertical to the direction of a magnetic flux flowing to the first core base body 30 and a saturation magnetic flux density of the first core base body, and the product of a sectional area roughly vertical to the direction of a magnetic flux flowing to the first magnetic thin film 31 and a saturation magnetic flux density of its first magnetic thin film 31 becomes the smallest at positions of thick lines A, B, C, D and E. In case when sectional areas of parts which have been cut along the thick lines A, B, E, C and D are denoted as S1, S2, S3, S4 and S5, respectively, and a magnetic gap opposed area of the magnetic thin film 31, a saturation magnetic flux density of the first core base body 30, and a saturation magnetic flux density of the magnetic thin film 31 have been defined as S6, B31, and B32, respectively, the core base body 30 and the magnetic thin film 31 are constituted so that the expression is formed (S1+S2+S3)B32+ S4.B31>=S6.B32. In this way, an excellent magnetic characteristic is obtained.
摘要翻译：目的：通过构成芯基部和粘附在其表面上的磁性薄膜来提高磁特性，使得除了磁路的磁隙部分以外的截面积和饱和度的乘积的总和的最小值磁通密度超过磁性薄膜的乘积和饱和磁通密度。构成：除了第一铁心半体24中的磁隙对置面以外的磁路中，与流过第一铁心基体30的磁通的方向大致垂直的截面积的积的总和和饱和第一芯基体的磁通密度以及与流过第一磁性薄膜31的磁通方向大致垂直的截面积和其第一磁性薄膜31的饱和磁通密度的乘积成为最小在粗线A，B，C，D和E的位置处，沿着粗线A，B，E，C和D切割的部分的截面面积被表示为S1，S2，S3，S4和 S5，磁性薄膜31的磁隙对置区域，第一芯基体30的饱和磁通密度和磁性薄膜31的饱和磁通密度定义为S6，B31，和B32，分别为核心底座 y 30和磁性薄膜31构成为形成表达式（S1 + S2 + S3）B32 + S4.B31> = S6.B32。以这种方式获得优异的磁特性。

2. 发明专利

JPS6174113A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS6174113A
公开(公告)日：1986-04-16
申请号：JP19487684
申请日：1984-09-19
申请人： Hitachi Ltd , Hitachi Maxell Ltd
发明人： TOTTORI TAKESHI , FUJIWARA HIDEO , HAYASHI MASASHI , USUI AKIRA , KUMASAKA TAKAYUKI , OTOMO MOICHI , KUDO SANEHIRO , ISHIHARA KIYOSHI
IPC分类号： G11B5/245 , G11B5/127 , G11B5/187 , G11B5/23 , G11B5/31
CPC分类号： G11B5/3103 , G11B5/1878
摘要： PURPOSE:To prevent crack and chipping of a core half at manufacture and to ensure excellent magnetic characteristic by forming a very narrow flat part to the tip of a projection of the core half coated with a magnetic film. CONSTITUTION:A flat part 70 having a very narrow width not causing any pseudo magnetic gap, e.g., 15mum or the like is formed at the tip of the projection 29 of the 1st core base 30 to which the 1st magnetic film 31 of a recording/ reproducing head 21 is coated. Then similar flat parts 71, 72, 73 are formed at projections 42, 45 of of an erasure head 22 and a projection 32 of the 2nd core base 33. Thus, crack and chipping at manufacture of the core half are prevented, the number is reduced to 1/3 of that of a conventional head and the excellent magnetic characteristic is ensured.
摘要翻译：目的：为了防止制造时半芯片的裂纹和碎裂，并且通过在涂覆有磁性膜的芯部半部的突起的尖端上形成非常窄的扁平部分来确保优异的磁特性。构成：在第一芯基座30的突起29的顶端处形成具有非常窄的宽度的不产生任何假磁隙（例如15μm等）的平坦部分70，记录/ 再现头21被涂覆。然后，类似的平面部分71,72,73形成在擦除头22的突起42,45和第二芯基座33的突出部32上。因此，防止在芯部半制造时的裂纹和碎裂，数量是降低到常规头的1/3，并且确保优异的磁特性。

3. 发明专利

JPS61115204A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS61115204A
公开(公告)日：1986-06-02
申请号：JP23596684
申请日：1984-11-10
申请人： Hitachi Ltd , Hitachi Maxell Ltd
发明人： INAGOYA OSAMU , FUJIWARA HIDEO , TOTTORI TAKESHI , HAYASHI MASASHI , OTOMO MOICHI , KUMASAKA TAKAYUKI , KUDO SANEHIRO
IPC分类号： G11B5/127 , G11B5/187 , H01F10/20
CPC分类号： G11B5/127 , G11B5/187
摘要： PURPOSE:To assure an excellent magnetic characteristic by positioning the sliding surface of a substrate which supports a thin ferromagnetic metallic film toward the (1, 1, 0) face from the single crystal manganese-zinc ferrite face and toward the (2, 1, 1) face from the (1, 1, 1) face respectively within specific angles of inclination. CONSTITUTION:A magnetic head is manufactured by using respectively single crystal manganese-zinc ferrite as the core substrate and an amorphous alloy of cobalt-niobium-zirconium as the thin ferromagnetic metallic film. The magnetic head is brought into contact with a magnetic disk while the disk is kept rotated to maintain the continuous sliding contact between the head and disk. As a result, the head is so formed that the sliding surface of the core substrate is positioned within the range of 0-30 angle of inclination from the (1, 1, 1) face toward the (1, 1, 0) face and within the range of 0-30 angle of inclination from the (1, 1, 1) face toward (2, 1, 1) face, then the core substrate and the thin ferromagnetic metallic film wear approximately at the similar rate and therefore the difference of steps between both is extremely small.
摘要翻译：目的：通过将支撑薄铁磁性金属膜的基板的滑动面从单晶锰锌铁氧体磁体朝向（1，1，0）面朝向（2,1， 1）分别在特定倾斜角内从（1,1,1）面朝向。构成：通过分别使用单晶锰锌铁氧体作为核心基板和钴 - 铌 - 锆的非晶合金作为薄铁磁金属膜来制造磁头。磁盘与磁盘接触，同时保持磁盘旋转以保持磁头和磁盘之间的连续滑动接触。结果，头部形成为使得芯基板的滑动面位于从（1,1,1）面朝向（1,1,0）面的0-30°的倾斜角度的范围内，以及在从（1,1,1）面到（2,1,1）面的0-30°的倾角范围内，芯基板和薄铁磁性金属膜的磨损程度大致相同，因此差异两者之间的步骤是非常小的。

4. 发明专利

JPS63213108A MAGNETIC HEAD 失效
公开(公告)号：JPS63213108A
公开(公告)日：1988-09-06
申请号：JP4532487
申请日：1987-03-02
申请人： HITACHI MAXELL , HITACHI LTD
发明人： INAGOYA OSAMU , MIKAMI HIROSUKE , TOTTORI TAKESHI , ONUKI TAKESHI , FUJIWARA HIDEO , OTOMO MOICHI
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23 , G11B5/31
摘要： PURPOSE:To prevent the conduction between thin magnetic metallic films and to maintain the insulating characteristic of intermediate layers to be formed between the thin magnetic metallic films so as to improve recording and reproducing characteristics by forming the above-mentioned intermediate layers in such a manner that said layers project from the end faces of the thin magnetic metallic films. CONSTITUTION:The intermediate layers 2 as insulating layers are provided to the end faces of the thin magnetic metallic films 1 in such a manner that said layers partly project from the end faces. A nonmagnetic material having the hardness larger than the hardness of the film 1 is used for the layer 2 in the case of using a method for polishing the end faces to a specular surface for the above-mentioned purpose. Then, the worn layer of the layer 2 is formed smaller than the films 1 and the layers 2 project from the end faces of the films 1. The recording and reproducing characteristics can be improved by setting the roughness of the mirror-polished surface at

5. 发明专利

JPS6299903A MAGNETIC HEAD FOR VERTICAL RECORDING 失效
公开(公告)号：JPS6299903A
公开(公告)日：1987-05-09
申请号：JP23739985
申请日：1985-10-25
申请人： HITACHI LTD , HITACHI MAXELL
发明人： KUMASAKA TAKAYUKI , NAKAGAWA KAZUNARI , OTOMO MOICHI , SAITOU NORITOSHI , SHIIKI KAZUO
IPC分类号： G11B5/127 , G11B5/187
摘要： PURPOSE:To measure the depth of gap by forming a gap depth control film made of a laminated structure of film or thin plate or a single layer to an auxiliary member. CONSTITUTION:The 1st auxiliary member 4 and the 2nd auxiliary member 4' consist respectively of high permeability magnetic materials 13, 13' and non- magnetic materials 14, 14' and gap depth control films 15, 15' are arranged at the boundary of the both. Then a main magnetic film 12 is clipped by the 1st and 2nd auxiliary members in sandwich shape to form a main magnetic core. In polishing a face of the main magnetic pole block opposing to the recording medium, the gap depth control films 15, 15' are exposed. That is, the gap depth (gd) is obtained by measuring the exposed width C of the gap depth control film 15 or 15'.

6. 发明专利

JPS6139907A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS6139907A
公开(公告)日：1986-02-26
申请号：JP16026484
申请日：1984-08-01
申请人： Hitachi Ltd , Hitachi Maxell Ltd
发明人： FUJIWARA HIDEO , KUMASAKA TAKAYUKI , OTOMO MOICHI , YAMASHITA TAKEO , KUDO SANEHIRO
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23 , G11B5/245 , G11B5/31
CPC分类号： G11B5/3103 , G11B5/187 , G11B5/313
摘要： PURPOSE:To realize a head having an excellent magnetic characteristic by increasing the total thickness of the magnetic thin film of a core half having a titled base to a gap face to be larger than the width at the tip of a magnetic thin film corresponding to the track width. CONSTITUTION:A side face 7 of two core halves 9, 10 opposing a gap face is tilted to the gap face and the magnetic thin film 4 is formed to the side face 7. Then the total thickness of the magnetic thin film 4, that is, T1+T3, is set to be larger than the width TW at the tip of the magnetic thin film 4 corresponding to the track width. Thus, the magnetic saturation of the magnetic thin film at a part from the magnetic gap before the saturation of a magnetic flux density of the magnetic gap occurred conventionally is avoided and the head with excellent magnetic characteristic enhancing sufficiently the effect of the magnetic thin film is obtained.
摘要翻译：目的：通过将具有标称基底的芯半部的磁性薄膜的总厚度增加到间隙面来实现具有优异磁特性的磁头，其大于对应于磁性薄膜的磁性薄膜的尖端处的宽度轨道宽度。构成：与间隙面相对的两个半部分9,10的侧面7向间隙面倾斜，并且磁性薄膜4形成在侧面7上。然后，磁性薄膜4的总厚度，T1 + T3被设定为大于与磁道宽度对应的磁性薄膜4的前端的宽度TW。因此，可以避免磁性薄膜在磁饱和之前的磁隙的一部分处的磁饱和发生，磁性薄膜的效果充分提高，获得。

7. 发明专利

JPS61145712A MAGNETIC HEAD 失效
公开(公告)号：JPS61145712A
公开(公告)日：1986-07-03
申请号：JP26636784
申请日：1984-12-19
申请人： HITACHI MAXELL , HITACHI LTD
发明人： FUJIWARA HIDEO , TOTTORI TAKESHI , HAYASHI MASASHI , INAGOYA OSAMU , YAMANO MINORU , KUMASAKA TAKAYUKI , OTOMO MOICHI , KUDO SANEHIRO , MORIKAWA JUICHI
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23 , G11B5/265 , G11B5/31
摘要： PURPOSE:To decrease the time needed for formation of a magnetic thin film by forming a projection part with plural projections at a part where the core base of a core half is set opposite to a magnetic gap. CONSTITUTION:The projection parts 29 and 32 containing four projections are formed at the parts where the 1st and 2nd core bases 30 and 33 of a record/ reproduction head 21 are set opposite to a magnetic gap 35. Therefore magnetic thin films 31 and 34 are formed into plural chevrons at their tip parts according to the forms of parts 29 and 32. Thus the areas near the bottom parts of those chevrons formed at the tips of both films 31 and 34 can be cut when the gap 35 is formed by cutting away both films 31 and 34. In such a way, the desired track width l of 100-140mum can be obtained easily by setting properly the sizes and numbers of projections of both parts 29 and 32 respectively.

8. 发明专利

JPS6174118A Magnetic head 失效
标题翻译：磁头
公开(公告)号：JPS6174118A
公开(公告)日：1986-04-16
申请号：JP19487584
申请日：1984-09-19
申请人： Hitachi Ltd , Hitachi Maxell Ltd
发明人： INAGOYA OSAMU , FUJIWARA HIDEO , TOTTORI TAKESHI , YAMANO MINORU , KUMASAKA TAKAYUKI , OTOMO MOICHI , KUDO SANEHIRO , MORIKAWA JUICHI
IPC分类号： G11B5/245 , G11B5/127 , G11B5/187 , G11B5/23 , G11B5/265 , G11B5/31
CPC分类号： G11B5/3103 , G11B5/1878
摘要： PURPOSE:To realize a head with excellent high frequency characteristic by selecting an cross angle of both side faces of a projected part of a core base as >=90 deg. so as to make the magnetic thin film thin. CONSTITUTION:A composite magnetic head consists of a recording/reproducing head 21, an erasure head 22 and an intermediate nonmagnetic substance 23. The 1st core half 24 consists of the 1st core base 30 having a projection 29 at the center of opposed side face to the magnetic gap 35 and the 1st magnetic thin film 31. Then a top angle theta2 of the projection 29 is specified in the range between 90 and 150 deg.. The similar structure is applied also to the erasure head 22. Thus, the characteristic of the magnetic thin film is attained sufficiently and chipping is prevented to make the film thickness thin. Thus, the magnetic loss based on eddy currents is suppressed to obtain a head with excellent high frequency characteristic.
摘要翻译：目的：通过选择核心基底的突出部分的两个侧面的横角为> = 90度，实现具有优异的高频特性的头部。从而使磁性薄膜变薄。构成：复合磁头由记录/再现头21，擦除头22和中间非磁性物质23组成。第一芯半部24由第一芯基座30组成，第一芯基座30具有在相对侧面至磁隙35和第一磁性薄膜31.然后，凸起29的顶角θ2在90和150度之间的范围内。类似的结构也应用于擦除头22.因此，充分地获得磁性薄膜，防止了切片，使薄膜变薄。因此，抑制基于涡电流的磁损耗，以获得具有优异的高频特性的磁头。

9. 发明专利

JP2004334995A Thin film magnetic head 审中-公开
标题翻译：薄膜磁头
公开(公告)号：JP2004334995A
公开(公告)日：2004-11-25
申请号：JP2003130983
申请日：2003-05-09
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OTOMO MOICHI , FUKUI HIROSHI , YONEKAWA SUNAO , MARUYAMA YOJI , IWAKURA TADAYUKI
IPC分类号： G11B5/39
CPC分类号： G11B5/3916
摘要： PROBLEM TO BE SOLVED: To provide a thin film magnetic head having small thermal protrusion with respect to the rise of the environmental temperature.
SOLUTION: A magnetic material having a low thermal expansion coefficient that is equal to or less than 11.5×10
-6 /K is used for at least one of a bottom section shield or a top section shield. Moreover, a laminated layer film made of a magnetic material having a low thermal expansion coefficient that is equal to or less than 11.5×10
-6 /K and an 80 wt% NiFe alloy is used for at least the bottom section shield or the top section shield. Thus, a thin film magnetic head, in which noise is made low after recording and thermal protrusion is reduced, is obtained.
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：提供相对于环境温度的升高具有小的热突起的薄膜磁头。解决方案：低热膨胀系数等于或小于11.5×10 -6 / SP / K的磁性材料用于底部屏蔽或顶部部分中的至少一个屏蔽。此外，至少使用由低热膨胀系数等于或小于11.5×10 -6 SPF / K和80重量％NiFe合金的磁性材料制成的叠层膜底部屏蔽或顶部屏蔽。因此，获得了在记录和热突起之后使噪音降低的薄膜磁头。版权所有（C）2005，JPO＆NCIPI

10. 发明专利

JP2004178664A Recording and reproduction separation type magnetic head 审中-公开
公开(公告)号：JP2004178664A
公开(公告)日：2004-06-24
申请号：JP2002342184
申请日：2002-11-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： OTOMO MOICHI , FUKUI HIROSHI , YOSHIDA NOBUO
IPC分类号： G11B5/31 , G11B5/33 , G11B5/39
CPC分类号： B82Y25/00 , B82Y10/00 , G11B5/3113 , G11B5/3116 , G11B5/313 , G11B5/3146 , G11B5/332 , G11B5/3967 , G11B2005/3996
摘要： PROBLEM TO BE SOLVED: To provide a recording and reproduction separation type magnetic head which has a high recording magnetic field and a low off-track leakage magnetic field and which has a narrow track thin film recording head suitable for a narrow track pitch.
SOLUTION: A protrusion 24 which has a width Lpfw which is equal to a track width Tw or a little wider than it and which is projected to a floating face side is provided in a lower magnetic pole 5 or a lower magnetic pole end layer 19. The lower magnetic pole 5 or the lower magnetic pole end layer 19 other than the protrusion is retreated from the floating face 15 by Lpfd. When the magnetic head is made to take such a constitution, the upper end face 23 of the lower magnetic pole 5 or the lower magnetic pole end layer 19, in which the leakage magnetic field of an off-track part is generated, is not exposed to the floating face 15, and hence the leakage magnetic field Hxz of the off-track part can be reduced sharply.
COPYRIGHT: (C)2004,JPO

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