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71. 发明专利

JPS5954070A Supporting device of magnetic head 失效
标题翻译：支持磁头设备
公开(公告)号：JPS5954070A
公开(公告)日：1984-03-28
申请号：JP16307282
申请日：1982-09-21
申请人： Fujitsu Ltd
发明人： TAKAHASHI MINORU , YONEOKA SEIJI
IPC分类号： G11B5/11 , G11B5/60 , G11B17/32
CPC分类号： G11B5/11 , G11B5/6005
摘要： PURPOSE:To support a magnetic head with high stability and to prevent the faults of electrification and an external magnetic field, by forming a magnetic shielding part having a head support hole at the center part of a magnetic head fupporting device and at the same time providing a conductor part projecting toward a medium at the outer circumference of the magnetic shielding part. CONSTITUTION:A magnetic head supporting device A consists of a magnetic shielding part 2 of a soft magnetic material having a head supporting hole 1 at the center part of a circular structure and a conductor part 3 made of conductive ceramics projecting toward the medium side and formed at the outer circumference of the part 2. Thus the pressing force F and the sucking force (f) are generated at parts 2 and 3, respectively. Then the positive pressure is harmonious with the negatige pressure to hold a head 4 with high stability. In addition, the magnetic force of magnetic parts and the external magnetic force are absorbed by the part 2 to eliminate the generation of noises. The electrification due to friction is avoided by earthing the part 3 to prevent a crush fault.
摘要翻译：目的：通过在磁头支撑装置的中心部分形成一个具有头部支撑孔的磁屏蔽部分，同时提供高度稳定性的磁头并防止电气故障和外部磁场，在磁屏蔽部的外周朝向介质突出的导体部。构成：磁头支撑装置A由磁性材料的磁屏蔽部分2构成，该磁性材料在圆形结构的中心部分具有头部支撑孔1，以及由导电陶瓷制成的导体部分3，该导体部分向中间侧突出并形成在部分2的外周分别产生按压力F和吸力（f）。那么积极的压力与负面压力是和谐的，以保持高度稳定的头4。此外，磁性部分的磁力和外部磁力被部分2吸收，以消除噪声的产生。通过接地部件3避免摩擦引起的电气化，以防止挤压故障。

72. 发明专利

JPS58118026A OPTICAL MAGNETIC HEAD 失效
公开(公告)号：JPS58118026A
公开(公告)日：1983-07-13
申请号：JP21373381
申请日：1981-12-29
申请人： FUJITSU LTD
发明人： TAKAHASHI MINORU , OOE TAKESHI , YONEOKA SEIJI
IPC分类号： G11B5/60 , G11B5/00 , G11B5/02 , G11B5/31 , G11B11/10 , G11B11/105 , G11B13/04
摘要： PURPOSE:To reduce the writing current to accelerate the writing speed as well as to decrease the average waiting time, by providing a light transmitting part to a slider along with a condenser lens set in opposition to the light transmitting part and then setting a writing coil at a slider part at a position where no overlap occurs in an optical path of the light transmitting part. CONSTITUTION:A slider 2 contains a light transmitting part, and a thin film magnetic head part 10 is provided to the slider 2 at a position where no overlap occurs in the optical path of the light transmitting part. When access is given to the surface of a magnetic recording medium 4 of a head 3, the slider 2 shifts to a recording track and floats above the surface 5 of the medium at a slight distance to slide there by an air current. A light beam is irradiated to the surface 5 of a magnetic layer 14 via the light transmitting part of the slider 2. Then the writing is carried out by means of a writing air core coil 10 to a magnetic layer region where the coercive force is reduced. The size of the coil 10 can be reduced since the coil is infinitely brought close to the surface of the layer 14. Furthermore, the current value is also reduced as compared with the conventional level. This process accelerates the writing speed and also decreases the average waiting time for rewriting.

73. 发明专利

JPS5696076A FORMATION OF METALLIC MASK FOR ION ETCHING 失效
公开(公告)号：JPS5696076A
公开(公告)日：1981-08-03
申请号：JP17099379
申请日：1979-12-28
申请人： FUJITSU LTD
发明人： KUME TOMIO , TSUTSUMI SHIYOUICHI , YONEOKA SEIJI
IPC分类号： C23F4/00 , C23F1/00 , G11B5/127 , G11B5/187
摘要： PURPOSE:To form titled mask which is capable of forming precision pattern and is excellent in peeling resistance, by forming adhered coating of Al, Al alloy, or Cr etc. on the material made of metallic oxide which is to be worked, then by using lift-off method. CONSTITUTION:Adhered coating 2 made of Al, Al alloy, or other metal having high affinity for oxygen is formed on the material to be worked 1 made of metallic oxide such as photoceram, or ferrite. Then the material is prebaked by spin coating with suitable resist and postbaked by exposure and development according to a suitable pattern to form resist coating 3. Layers 4, 4a made of metal such as Ti etc. and thinner than the coating 3 are formed. The whole material 1 to be worked is immersed in a solvent in orde to remove coatings 3 and 4 simultaneously, hereby mask 4a of desired form is formed on the material 1 to be worked with interposition of said adhered coating 2. The member 4a is hardly peeled during ion etching.

74. 发明专利

JPS5693112A PRODUCTION OF THINNFILM MAGNETIC HEAD 失效
公开(公告)号：JPS5693112A
公开(公告)日：1981-07-28
申请号：JP16899879
申请日：1979-12-25
申请人： FUJITSU LTD
发明人： TSUTSUMI SHIYOUICHI , KUME TOMIO , YONEOKA SEIJI
IPC分类号： G11B5/31 , G11B5/60
摘要： PURPOSE:To produce a thin-film magnetic head, by setting together a number of slider blocks or dummy blocks to protect the thin-film magnetic head pattern and then giving an ion etching to the floating surface of the thin-film magnetic head slider block. CONSTITUTION:In the production of a thin-film magnetic head which is used for the recording and reproduction of the information by a magnetic disk device or the like, the thin-film head pattern 2 is formed at the block 1 along with the protective film 3 formed at the area of the pattern 2. The cover glass 4 is provided to protect the pattern 2 when the block is cut out. In such way, the block 1 containing the pattern 2 is put together in plural numbers. As a result, the mask material is prevented from flowing into the pattern 2 and also prevented from being etched in the ion etching.

75. 发明专利

JPS5625220A MANUFACTURE OF THIHHFILM MAGNETIC HEAD 失效
公开(公告)号：JPS5625220A
公开(公告)日：1981-03-11
申请号：JP10045579
申请日：1979-08-07
申请人： FUJITSU LTD
发明人： YONEOKA SEIJI , TANAKA TOSHIO
IPC分类号： G11B5/31
摘要： PURPOSE:To prevent an SiO2 film from peeling off by eliminating the generation of bubbles of low-fusion-point glass in baking by providing a chromium-reaction- preventive film between the low-fusion-point glass, used for cover-glass bonding, and an insulating layer SiO2 film. CONSTITUTION:On substrate 1, lower magnetic film 2, insulating layer SiO25', conductor layer 3, insulating layer SiO25'', upper magnetic layer 4, and protective layer SiO25 are formed successively by sputtering, vapor-deposition, etc. On protective film SiO2, chromium-reaction-preventive film 9 is formed by sputtering, vapor-deposition, etc., and on it, cover glass 7 is bonded by low-fusion-point glass 6'. Next, this body is cut into a wafer, which is stuck to a slider by low-fusion- point glass and lapped to form a gap. In this method, providing the chromium film eliminates the generation of bubbles in low-fusion-point glass 6' due to reaction, and cover glass 7 can be bonded with high reliability.

76. 发明专利

JPS55132520A MAGNETIC HEAD 失效
公开(公告)号：JPS55132520A
公开(公告)日：1980-10-15
申请号：JP3791479
申请日：1979-03-30
申请人： FUJITSU LTD
发明人： YONEOKA SEIJI
IPC分类号： G11B5/17 , G11B5/127 , G11B5/23
摘要： PURPOSE:The magnetic head constituted in combination of the gap formed with the bulk magnetic substance and the coil conductor formed with thin film, which can be prevented from the defection of thin film due to mechanical machining and head clash, and with good manufacture yield rate and ease of manufacture. CONSTITUTION:The magnetic head is constituted by sticking the U core block U and the loop bar block L. Further, the U core block U consists of the U core section consisting of the bulk magnetic substance 1 and the gap section 2 formed with the glass 9 in advance with bonding in finishing into specified size and performing the read/write to the recording media. Further, the loop bar block L forms the magnetic substance layer 5 first on the substrate 6, and the magnetic circuit forming magnetic substance thin film projection 3 and the thin film coil 4 are formed by using fine machining technology. Thus, since the forming of the gap 2 and the bonding of the U core block U to the slider are made before the bonding of thin film lacking in heat-proof, stable glass bonding can be made at high temperatures.

77. 发明专利

JPS55132519A MANUFACTURE FOR THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPS55132519A
公开(公告)日：1980-10-15
申请号：JP3936979
申请日：1979-04-03
申请人： FUJITSU LTD
发明人： YONEOKA SEIJI
IPC分类号： G11B5/23 , G11B5/31
摘要： PURPOSE:To obtain the said head having accurate gap, by two sections at the boundary of the gap and forming the second upper magnetic layer via the insulation layer so that it is overlapped with the taper being the gap of the first upper magnetic substance layer, in forming the upper magnetic layer of thin film magnetic head. CONSTITUTION:In manufacture of thin film magnetic substance head, the lower magnetic substance layer 7 is formed on the substrate 6, the coductor coil 9 is formed via the insulation layer 8 on it, and the fist magnetic substance layer 11 is formed on it via the insulation layer 10. Next, the resist 12 is formed so that the end comes to the part forming the gap and the taper is provided on the first upper magnetic substance layer with etching. Next, on it, the magnetic insulation layer 13 and the magnetic substance layer 14 are formed, and after forming the resist 16 on the part being the second upper magnetic substance layer of the magnetic substance layer 14, the magnetic substance layer on the first upper magnetic substance layer 11 is removed with etching, the upper surface of the first upper magnetic substance layer 11 and the second upper magnetic substance layer 15 is finished smooth on the same plane to constitute the gap 17.

78. 发明专利

JPS5570923A MANUFACTURE FOR THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPS5570923A
公开(公告)日：1980-05-28
申请号：JP14278778
申请日：1978-11-21
申请人： FUJITSU LTD
发明人： YONEOKA SEIJI , TAKAHASHI MINORU
IPC分类号： G11B5/31
摘要： PURPOSE:To perform bonding without giving damage to the main part of the magnetic head, by clipping the glass rod between the upper magnetic layer and the cover and by the pressing and bonding in the stage that the glass rod is in excess of the softening point with heating, in the manufacture of thin film magnetic heads. CONSTITUTION:After providing the lower magnetic layer 2 on the substrate 1, conductive layer 3 surrounded with the insulation layer 3a on it, and the upper magnetic layer 4 on the layer 3 so that it forms a gap with the lower magnetic substance layer 2, the glass rod 11 is clipped between the layer 4 and the cover 5 and press bonding is made in the stage in excess of the softening point of the glass rod 11 with heating. Thus, different from the method with bonding using capillary tube phenomenon with molten glass rod, since no high heating is used, no damage is given to the main part of the magnetic head. Accordingly, excellent head can be obtained.

79. 发明专利

JPS5424009A WORKING METHOD OF MAGNETIC HEADS 失效
公开(公告)号：JPS5424009A
公开(公告)日：1979-02-23
申请号：JP8882877
申请日：1977-07-26
申请人： FUJITSU LTD
发明人： MIURA YOSHIMASA , YONEOKA SEIJI , KAKEHI AKIRA
IPC分类号： G11B5/23 , G11B5/187 , G11B5/31
摘要： PURPOSE:To automatically detect lapping quantity of lapping and achieve automation of lapping by opposing the end part to be worked of a thin-film magnetic tape to a lapping surface plate formed with NS magnetization inverting part and causing a pair of working motion to be accomplished.

80. 发明专利

JPS545708A PRODUCTION OF THINNFILM MAGNETIC HEADS 失效
公开(公告)号：JPS545708A
公开(公告)日：1979-01-17
申请号：JP7001377
申请日：1977-06-15
申请人： FUJITSU LTD
发明人： YONEOKA SEIJI , MIURA YOSHIMASA
IPC分类号： G11B5/187 , G11B5/31 , G11B5/455
摘要： PURPOSE:To determine the completion of working of gaps and enhance dimensional accuracy by detecting the inductance change when a closed magnetic circuit is cut off by polishing.

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