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81. 发明专利

JPS58224432A Base plate for magnetic head 失效
标题翻译：磁头基板
公开(公告)号：JPS58224432A
公开(公告)日：1983-12-26
申请号：JP10691282
申请日：1982-06-23
申请人： Hitachi Ltd
发明人： TAMURA MITSUHARU , KONISHI KATSUO , GOTOU NORIO , KAWANO KANJI , ZAMA HIDEO , ONO HIROAKI
IPC分类号： G11B5/53 , G11B5/105
CPC分类号： G11B5/105
摘要： PURPOSE:To improve the yield of mass production, by forming a notched groove to be exclusively used for fitting and holding a magnetic head chip so as to have a gap enabling a bonding layer to be formed between the magnetic head chip and the notched groove of the magnetic head base. CONSTITUTION:The head chip fitting and holding notched groove 7, a tape sliding surface 9, the leading end 10 of a winding, a resin bonding agent 11, the bottom reference surface 12 of a head base plate 1 are formed. The measurements l indicates the distance from the bottom reference surface 12 of the head base plate 1 to the back end 10 of an operation gap and the measurements d indicates the distance from the tape sliding surface 9 to the approximate center of the leading end part of the head base plate 1, i.e. the depth of the operation gap. The notched groove 7 to fit and hold the head chip in the direction of an arrow is formed on the approximate center of the leading end part of the head base plate 1 in parallel with the thickness direction of the head base plate 1 or with a required angle theta from the thickness direction.
摘要翻译：目的：为了提高批量生产的产量，通过形成专门用于安装和保持磁头芯片的切口槽，以便具有能够在磁头芯片和切口槽之间形成接合层的间隙磁头基座。构成：形成头芯片嵌合和保持凹槽7，带滑动表面9，绕组的前端10，树脂粘合剂11，头基板1的底部参考表面12。测量值l表示从头基板1的底部参考表面12到操作间隙的后端10的距离，测量值d表示从带滑动表面9到前端部分的大致中心的距离头基板1，即操作间隙的深度。在头基板1的前端部的大致中央部与头基板1的厚度方向平行地形成有用于将头部芯片沿箭头方向嵌合的切口槽7，角度θ从厚度方向。

82. 发明专利

JPS58161122A MAGNETIC HEAD 失效
公开(公告)号：JPS58161122A
公开(公告)日：1983-09-24
申请号：JP4270982
申请日：1982-03-19
申请人： HITACHI LTD
发明人： KAWANO KANJI , KONISHI KATSUO , ZAMA HIDEO , GOTOU NORIO , ABE MITSUO , TAMURA MITSUHARU
IPC分类号： G11B5/255 , G11B5/31
摘要： PURPOSE:To improve yield of a magnetic head and its reliability, by forming a substance whose coefficient of thermal expansion is similar to a magnetic film and whose hardness is equal to it or above, on the magnetic film, by a thin film forming technique, and using it as a protecting film. CONSTITUTION:On a non-magnetic substrate 1, a ''Sendust '' film 2 is formed by means of spattering, which is formed into the first magnetic film. By use of a diamond cutting tool, a V-shaped groove 10 is formed on the sendust film 2, and one inclined face of the groove is made a gap face. SiO2 3 is made to adhere to thickness of 0.3mum, which becomes a gap spacer material. Also, the second Sendust film 4 is made to adhere by means of spattering. Subsequently, the second Sendust film 4 is removed to a U-shaped groove 11 up to the SiO2 film 3 by use of the diamond cutting tool. Subsequently, an Al2O3 film 9 is formed by use of a high speed magnetron spattering device, which is made a protecting film.

83. 发明专利

JPS58161104A MAGNETIC PICTURE RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPS58161104A
公开(公告)日：1983-09-24
申请号：JP4256682
申请日：1982-03-19
申请人： HITACHI LTD
发明人： KONISHI KATSUO , GOTOU NORIO , ZAMA HIDEO
IPC分类号： G11B5/008 , G11B5/02 , G11B5/52
摘要： PURPOSE:To easily execute magnetic recording with high density, by 4 magnetic heads provided at intervals of 90 degrees to each other against a rotary shaft, on a cylinder. CONSTITUTION:A cylinder 1 is constituted so as to obtain 2 kinds of rotating periods by switching a switch. On the other hand, magnetic heads 2a, 2c are heads having an azimuth of +6 deg. and -6 deg., respectively. Magnetic heads 2b, 3d are heads having an azimuth of 0 deg., provided at a position of 90 deg. around the rotary shaft to each other against the magnetic heads 2a, 2c, respectively. A track position of the magnetic heads 2a-2d is set to the same height against the cylinder face, so that a track locus of 4 magnetic heads 2a-2d becomes same when the cylinder 1 rotates.

84. 发明专利

JPS58128015A THIN FILM MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPS58128015A
公开(公告)日：1983-07-30
申请号：JP998982
申请日：1982-01-27
申请人： HITACHI LTD
发明人： ABE MITSUO , KONISHI KATSUO , TAMURA MITSUHARU , KAWANO KANJI
IPC分类号： G11B5/23 , G11B5/31
摘要： PURPOSE:To attain the formation of U-shaped grooves with high accuracy, by decreasing the angle of a tilt surface at the opposite side as the operating gap of a V-shaped groove and adopting the ion etching method for the process of the U-shaped groove formation. CONSTITUTION:The V-shaped groove 3 having good linearity is formed on the 1st magnetic thin film 2 with the shaping using a diamond bite, the slope 3a is taken as the operating gap plane having a prescribed azimuth angle, and an angle theta1 of the slope 3b is taken as Torr. of gaseous argon pressure, 600V of acceleration voltage, 0.5mA/cm of current density, an incident angle theta2 of the ion beam is taken equal to the angle theta1 of the slope 3b. Thus, the shaping is performed until the 2nd magnetic thin film 5 is separated left and right by said U-shaped groove 6. A nonmagnetic material is coated on the upper surface, a winding hole is formed and a winding is wound to complete the head.

85. 发明专利

JPS58121118A THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPS58121118A
公开(公告)日：1983-07-19
申请号：JP222482
申请日：1982-01-12
申请人： HITACHI LTD
发明人： KAWANO KANJI , KONISHI KATSUO , ZAMA HIDEO , GOTOU NORIO , ABE MITSUO , TAMURA MITSUHARU
IPC分类号： G11B5/31 , H01F10/28
摘要： PURPOSE:To produce a thin film magnetic head with high yield, by providing a groove fill with a nonmagnetic matter at a part of the surface touching a magnetic layer of a nonmagetic substrate and cutting a V-shaped groove with a depth reaching the nonmagnetic matter to divide the magnetic layer into two parts. CONSTITUTION:A groove 10 is formed to a surface of a substrate 1 made of glass or ceramic, and then a layer of a nonmagnetic matter 11 of Al2O3, etc. is formed on the substrate 1 by a sputtering process, etc. with such a thickness that fills the groove 10. The layer of the matter 11 is polished, and a magnetic layer 2 is formed on the matter 11. Then a V-shaped groove 6 is formed with a depth reaching the matter 11 to divide the layer 2 into two parts. A nonmagnetic layer 3 and a magnetic layer 4 are formed on the groove 6, and a groove is formed to divide the layer 4 into two parts. A protecting nonmagnetic layer 5 is formed on the layer 4. Thus a thin film magnetic head is obtained. When the groove 6 is formed, no damage is given to the substrate 1 although the matter 11 has breaks or cracks. This improves the yield of production.

86. 发明专利

JPS5850619A MAGNETIC HEAD 失效
公开(公告)号：JPS5850619A
公开(公告)日：1983-03-25
申请号：JP14791781
申请日：1981-09-21
申请人： HITACHI LTD
发明人： ZAMA HIDEO , KONISHI KATSUO , GOTOU NORIO , ABE MITSUO , KAWANO KANJI
IPC分类号： G11B5/31
摘要： PURPOSE:To form winding windows easily while maintaining the main characteristics of heads by forming the winding windows into a circular or elliptical shape and forming the same in the final stage of head manufacture. CONSTITUTION:A ''Sendust '' film 10 is sputtered to about 15mum on a substrate 9 of a non-magnetic material. Thereafter, a groove of a V shape in section is formed by a diamond tool on the film 10, and SiO2 is stuck on one slope of the groove by diagonal sputtering to the thickness at which a gap length is obtained, whereby an SiO2 layer 11 is formed. A ''Sendust '' film 12 of the 2nd layer is sputtered; thereafter part of the film 12 is removed with the diamond tool and a substrate 13 of a non-magnetic material is adhered. The head formed in such a way is rounded in a sliding direction and is then formed with a winding window 14 of a circular shape by an ultrasonic working machine.

87. 发明专利

JPS57198529A CHARACTERISTIC MEASURING DEVICE FOR MAGNETIC TAPE AND HEAD 失效
公开(公告)号：JPS57198529A
公开(公告)日：1982-12-06
申请号：JP8076281
申请日：1981-05-29
申请人： HITACHI LTD
发明人： MIURA KUNIAKI , KONISHI KATSUO , ZAMA HIDEO
IPC分类号： G01R33/12 , G11B5/455 , G11B5/84 , G11B33/10
摘要： PURPOSE:To measure the characteristics of a tape and a head, by winding and holding a test tape on a rotary cylinder with ring shaped groove on the outer circumference and rotating the rotary cylinder through the contact of a magnetic head for test on the tape. CONSTITUTION:A ring shaped groove 2 is formed on the outer circumference of a cylinder, a magnetic tape with a prescribed length is wound on the cylinder 1, and the both ends are taken inside of the cylinder 1 from a slit 3 and fixed with a holder 4. The position of recording, reproduction and erase heads 6, 7, and 8 is adjusted and they are contacted externally from a magnetic tape so that they are located at the center of broadwise direction of the groove 2. In this state, a motor 5 is rotated, the rotating speed of the cylinder 1 is kept to a specified value, and recording, reproduction and erase signals are applied to the heads 6, 7 and 8, allowing to measure the characteristics.

88. 发明专利

JPS5764323A Magnetic head and its manufacture 失效
标题翻译：磁头及其制造
公开(公告)号：JPS5764323A
公开(公告)日：1982-04-19
申请号：JP13881280
申请日：1980-10-06
申请人： Hitachi Ltd
发明人： MIURA KUNIAKI , KAWANO KANJI , KONISHI KATSUO
IPC分类号： G11B5/127 , G11B5/187 , G11B5/23
CPC分类号： G11B5/232
摘要： PURPOSE:To manufacture a magnetic head having an azimuth angle and also a stable working gap which is free from shift of a track, by making the junction surface of a nonmagnetic material and a magnetic material orthogonal to the working gap, and also inclining this junction surface to the direction of a tape by the azimuth angle of the working gap. CONSTITUTION:A magnetic head block is prepared so that a working gap 5 is made orthogonal to junction surfaces 7a, 7b of sendast thin films 2a, 2b and nonmagnetic materials 4a, 4b, and the junction surfaces 7a, 7b coincide with the moving direction T-T' of a tape. Subsequantly, the magnetic head block 8 is mounted on a cutting jig 9 whose upper surface has been inclined by an azimuth angle theta against the bottom surface, and the magnetic head block 8 is cut by surfaces A-A', B-B' being in parallel with the bottom surface of the cutting jig 9, by which a magnetic head is obtained. This magnetic head becomes a magneric head provided with an azimuth, which has a stable working gap 5 free from shift to a track.
摘要翻译：目的：通过使非磁性材料和磁性材料的接合面与工作间隙正交，制造具有方位角的磁头以及不产生磁道移动的稳定的工作间隙，并且还使该接合部通过工作间隙的方位角向磁带的方向表面。构成：制备磁头块使得工作间隙5与发送薄膜2a，2b和非磁性材料4a，4b的接合表面7a，7b正交，并且接合表面7a，7b与移动方向TT一致 “一个磁带。其次，磁头块8安装在上表面相对于底面倾斜方位角θ的切割夹具9上，并且磁头块8被平行的面A-A'，BB'切割与切割夹具9的底表面一起获得磁头。该磁头变成具有方位角的磁头，该方位具有不偏离轨道的稳定的工作间隙5。

89. 发明专利

JPS5641519A MAGNETIC HEAD 失效
公开(公告)号：JPS5641519A
公开(公告)日：1981-04-18
申请号：JP11669279
申请日：1979-09-13
申请人： HITACHI LTD
发明人： MIURA KUNIAKI , TAMURA MITSUHARU , KONISHI KATSUO , ABE MITSUO , MURAMORI KIYOSHI , ZAMA HIDEO , KAWANO KANJI
IPC分类号： G11B5/133 , G11B5/127 , G11B5/187 , G11B5/235 , G11B5/255
摘要： PURPOSE:To reduce an eddy current loss of the magnetic head and enhance both the wear resistance and the recording and reproducing efficiency, by forming a sendast film on the gap butt surface of the monocrystal ferrite core, and using the tape sliding surface of the core as a specific surface. CONSTITUTION:A sendast film 7a is formed on the mirror-finished surface of the monocrystal ferrite core 6a by means of sputtering, etc. As for the monocrystal ferrite core 6b, the sendast film 7b is formed on the mirror-finished surface by sputtering, etc. after the winding window 3 has been worked. A pair of cores 6a, 6b mentioned above are unified by placing the nonmagnetic layer between them in the form that the sendast films 7a, 7b are opposite to each other, and the magnetic head is formed by performing the winding 4 through the window 3. The layer 8 is arranged so that it extends over the parts of the magnetic gap 2 at least. As for the tape sliding surface 9 of the cores 6a, 6b, the face (100) or the face (110) which is excellent in wear resistance is used. It is also possible to record to a high antimagnetic metal tape by using this head.

90. 发明专利

JPS55142408A MAGNETIC HEAD 失效
公开(公告)号：JPS55142408A
公开(公告)日：1980-11-07
申请号：JP4897679
申请日：1979-04-23
申请人： HITACHI LTD
发明人： MIURA KUNIAKI , KONISHI KATSUO , YAMADA MASAMICHI
IPC分类号： G11B5/127
摘要： PURPOSE:To give the magnetic gap of high reliability and lamination effect to the magnetic head, by providing one or a plurality of grooves or cavities with the part excluding the vicinity of the magnetic gap of the magnetic substance core constituting the magnetic circuit. CONSTITUTION:The grooves 8a, 8b are cut off on the two magnetic substance cores 6a, 6b from the head sides 7a, 7b respectively. The part near the magnetic gap 2 of the cores 6a, 6b is kept the same as bulk core. Thus, the gap forming technique such as the sputtering or metal deposition having high reliability can be used. On the other hand, the surface area is increased for the other part with the grooves 8a, 8b. Since the path of magnetic flux due to eddy current loss is limited around the core surface, this increase in the surface area means the increase in the effective cross sectional area through which magnetic flux can flow, allowing to avoid the eddy current loss at high frequencies and heat dissipation due to it, resulting in increasing the recording and reproducing efficiency.

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