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11. 发明专利

JPH0522962B2 失效
公开(公告)号：JPH0522962B2
公开(公告)日：1993-03-31
申请号：JP2007884
申请日：1984-02-08
申请人： HITACHI LTD
发明人： ABE MITSUO , KONISHI KATSUO
IPC分类号： G11B5/31

12. 发明专利

JPH03104001A MAGNETIC RECORDING AND REPRODUCING DEVICE 失效
公开(公告)号：JPH03104001A
公开(公告)日：1991-05-01
申请号：JP23995289
申请日：1989-09-18
申请人： HITACHI LTD
发明人： YASUKOCHI MASAYA , KONISHI KATSUO , ARAI NOBUO , TSUCHIYA TOSHIO
IPC分类号： G11B5/008
摘要： PURPOSE:To accomplish the simultaneous recording and simultaneous reproducing of two channels by providing an entire width erasing head and a sound controlling head. CONSTITUTION:A track width R is taken as a sound part 22b and a control part 22c and a control track width C is taken as the sound part 21b and the control part 21c. The sound parts 21b and 22b record signals on sound tracks 1b and 2b respectively and the control parts 21c and 22c record the signals on control tracks 1c and 2c respectively. The control signals on the control tracks are made to synchronize with the signals recorded on tracks 1a and 2a. The track width R is divided in two to a sound track erasing part 12b and a control track erasing part 12c, and the control track width C is taken as a sound track erasing part 11b and a control track erasing part 11c, then a video track width B is taken as video track erasing parts 11a and 12a. The erasing parts 11a and 12a erase the tracks 1a and 2a, so that the simultaneous recording and simultaneous reproducing of two channels is executed and a divided area is independently erased, recorded and reproduced.

13. 发明专利

JPH03100912A THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH03100912A
公开(公告)日：1991-04-25
申请号：JP23702789
申请日：1989-09-14
申请人： HITACHI LTD
发明人： NAGATOMO HIROYUKI , SAITO MASAKATSU , KAWANO KANJI , KONISHI KATSUO , AOKI SHIGEO
IPC分类号： G11B5/31
摘要： PURPOSE:To cover Cu of connecting terminals with solder and to prevent the connection defect by the oxidation of the Cu by forming the connecting terminals of a signal coil to a shape having an arc of >=120 deg. vertex or >=20mum radius. CONSTITUTION:The thin-film magnetic head is successively laminated with a lower magnetic core 2, an insulating film 5, the signal coil 4 and an insulating film 5 on a nonmagnetic substrate 1. An upper magnetic core 6 connected to the lower magnetic core 2 is then laminated via a head gap 5 consisting of the insulating film 5. The insulating film 5 on electrodes 7 is removed and the connecting terminals 8 of the signal coil 4 are formed. The connecting terminals 8 are formed to the shape having the arc of >=120 deg. vertex or >= 20mum radius. The Cu of the connecting terminals 8 is coated with the solder in this way and the connection defect by the oxidation of the Cu is prevented.

14. 发明专利

JPH0337808A MANUFACTURE OF THIN FILM MAGNETIC HEAD AND PHOTOMASK USED IN MANUFACTURING 失效
公开(公告)号：JPH0337808A
公开(公告)日：1991-02-19
申请号：JP17178289
申请日：1989-07-05
申请人： HITACHI LTD
发明人： SHIBAYAMA YUKO , SAITO MASAKATSU , OGURA YUKIKO , AOKI SHIGEO , KONISHI KATSUO , ZAMA HIDEO
IPC分类号： G11B5/31
摘要： PURPOSE:To efficiently form an almost circular arc shape upper core by selecting film thickness so that a mask for upper magnetic core patterning can be dissipated when the etching of an upper magnetic core is finished. CONSTITUTION:An upper magnetic film which becomes an upper core is formed after the pattern of a lower layer part is formed, and resist is applied to the film, and masking with a core shape photomask 9 is applied to perform the patterning of the resist is upper core shape, then, UV irradiation is performed. Next, the photomasking 9 of a rear part is applied to optimize the resist film thickness of a front part, and exposure by reduced film thickness is performed, and the film thickness is formed so that a masking material can be dissipated when the etching is finished. By forming the film thickness in the above stated shape and performing the etching at an appropriate beam incident angle, the masking material is dissipated when the etching is finished, and the almost circular arc shape upper core can be obtained.

15. 发明专利

JPH031310A THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH031310A
公开(公告)日：1991-01-08
申请号：JP13466089
申请日：1989-05-30
申请人： HITACHI LTD
发明人： KAWANO KANJI , YAMADA MASAMICHI , TSUCHIYA TOSHIO , KONISHI KATSUO
IPC分类号： G11B5/31
摘要： PURPOSE:To allow the adjustment of an azimuth angle with high accuracy by providing makders which are positioned on a straight line in parallel with magnetic gaps when viewed flatly and are positioned on both sides in the transverse direction of the head on a sliding surface side by a photolithographic technique. CONSTITUTION:The markers 4A, 4B are formed by the photolithographic technique in the process for producing the thin-film magnetic head. the markers 4A, 4B are so formed as to be positioned on the straight line in parallel with the magnetic gaps 3A, 3B and on both sides in the transverse direction of the head. The distance necessary for calculating (adjusting) the azimuth angle is, therefore, easily measured and the assembly of the head with the markers 4A, 4B as references is possible. Since the distance between the two markers 4A and 4B can be taken relatively large, the measurement accuracy is improved. The azimuth angle of the high accuracy is obtd. in this way and the yield of the production and assembly is improved.

16. 发明专利

JPH02310812A THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH02310812A
公开(公告)日：1990-12-26
申请号：JP13014589
申请日：1989-05-25
申请人： HITACHI LTD
发明人： AKAI HIROSHI , KONISHI KATSUO
IPC分类号： G11B5/31 , G11B5/17
摘要： PURPOSE:To improve prouctivity and to allow sure and easy connection to the outside by joining a nonmagnetic substrate formed with a magnetic core, coil, insulating, bonding pads, etc., on one surface thereof and a supporting substrate formed with leader wirings in such a manner that the bonding pad and the one end of the leading wire are flush with each other on the same plane. CONSTITUTION:The nonmagnetic substrate 1 which is laminated with the magnetic core 2, coil 3 and insulating material formed as thin films and is formed with the bonding pads 4 connected to the ends of the coil on one surface thereof and the supporting substrate 5 consisting of a poor conductor material formed with the leader wirings 8 consisting of a conductive electrode material are joined to each other. The bonding pads 4 on the substrate 1 and the one end of the leader wirings 8 of the supporting substrate 5 are connected on the same plane and the other end of the leader wirings 8 is positioned onto the side face of the supporting substrate 5 approximately orthogonal with the connecting plane with the bonding pads 4. The productivity is improved in this way and the sure and easy connecting operation at the time of the assembly to a head base is carried out. The product having the high reliability of connection is thus obtd.

17. 发明专利

JPH02257415A ROTARY CYLINDER DEVICE, METHOD FOR ADJUSTING POSITION OF HEAD BASE, AND MANUFACTURE OF THE HEAD BASE 失效
公开(公告)号：JPH02257415A
公开(公告)日：1990-10-18
申请号：JP7666189
申请日：1989-03-30
申请人： HITACHI LTD
发明人： KONISHI KATSUO , ABE MITSUO , ARAI NOBUO , IWAMA AKIRA
IPC分类号： G11B5/53
摘要： PURPOSE:To simplify assembling work by fitting a magnetic head to a ring- shaped head base whose diameter is smaller than that of a cylinder, so that the tip part of the head base can be protruded from the outer circumferential surface of the cylinder by prescribed quantity. CONSTITUTION:A head fitting part 2a is provided in the outer diameter side of a ring-shaped head base 2, whose outer diameter is slightly smaller than that of a rotary cylinder 4, and a magnetic head 1 is adhered and fixed. In such a state, grinding work or performance measurement is executed for attaching the magnetic head 1 to a tape sliding surface R. Afterwards, a head base 2 is temporarily held to the rotary cylinder 4 and afterwards, assembly is executed by integrating a fixed cylinder 5 and rotary transformer 7, etc. A jig is inserted from the upper part of the rotary cylinder 4 and the position of the head base 2 is adjusted to the main body of the cylinder. Finally, the head base 2 is regularity fixed to the rotary cylinder 4 by a fitting screw 3. Thus, the assembling work is simplified.

18. 发明专利

JPH0294019A MULTITRACK MAGNETIC HEAD AND METHOD FOR CONTROLLING TRACKING BY SUCH HEAD 失效
公开(公告)号：JPH0294019A
公开(公告)日：1990-04-04
申请号：JP24439788
申请日：1988-09-30
申请人： HITACHI LTD
发明人： AKAI HIROSHI , KONISHI KATSUO
IPC分类号： G11B5/29 , G11B5/48 , G11B5/58
摘要： PURPOSE:To attain high efficient recording and reproducing and the correct tracking control by providing first and second multitrack magnetic heads composed of plural unit thin film heads onto a substrate, and making different the track pitch of both. CONSTITUTION:On a non-magnetic substrate 1, a magnetic resistance effect type multihead 2 for tracking control formed by the thin film technology and a multihead 3 for recording and reproducing main information assembled to a high accuracy with the thin film technology are provided in parallel. Since the track pitch of the head 2 has the pitch different from the recording and reproducing track pitch of the main information, by relatively comparing the reproducing output level from respective channels of the head 2, the tracking dislocation can be detected and corrected. At the time of recording the head 3, the signal reproduced simultaneously by the head 2 is stored as a peak pattern signal, this is tracking-controlled as a referring signal at the time of reproducing the main information, and thus, the tracking characteristic at the time of recording can be correctly traced and the very strict tracking control can be executed.

19. 发明专利

JPH01194121A MAGNETIC HEAD CHARACTERISTIC MEASURING INSTRUMENT 失效
公开(公告)号：JPH01194121A
公开(公告)日：1989-08-04
申请号：JP1730188
申请日：1988-01-29
申请人： HITACHI LTD
发明人： ABE MITSUO , KONISHI KATSUO
IPC分类号： G11B5/455
摘要： PURPOSE:To attain a measurement in which a signal envelope is uniform and good by stretching a magnetic tape directly for the inner circumference surface of a rotary drum by the centrifugal force of the tape. CONSTITUTION:A magnetic tape 14 makes almost one round along an inner circumference surface 11 of a rotary drum 11, one end 14a of the magnetic tape 14 is fixed by a tape fixing part 22 through a slit 21 provided for the rotary drum 11 and the other end 14b is made free. As the drum rotates, the centrifugal force acts on the respective parts of the magnetic tape 14 and it is pressed on the inner circumference surface 11a of the rotary drum 11, the flow of air generated by the rotation also acts and the magnetic tape is stretched round the drum uniformly in an instant. A magnetic head 15 is connected to the magnetic tape 14, after that, records and reproduces in a position projecting by 10-20mum to the side of the circumference surface. Thus, the uniform envelope is obtained and the highly accurate measurement is not spoiled.

20. 发明专利

JPH01182912A ROTARY CYLINDER 失效
公开(公告)号：JPH01182912A
公开(公告)日：1989-07-20
申请号：JP379788
申请日：1988-01-13
申请人： HITACHI LTD
发明人： KONISHI KATSUO
IPC分类号： G11B5/52
摘要： PURPOSE:To attain small size, light weight and thin profile and to reduce the cost by devising the cylinder such that the upper cylinder is fixed and the lower cylinder is made turnable. CONSTITUTION:When a drive current is supplied to a motor 6, a torque is caused to the rotor, the lower cylinder 1 is driven and the head 4 is also driven. A magnetic tape is press contact over a range of a prescribed angle of the outer circumferential face of the lower cylinder 1 and the upper cylinder 2, runs with a tilt by a prescribed angle onto a drive face of the lower cylinder 1 and a recording track 12 is formed obliquely to the lengthwise direction on the magnetic tape 11. The upper cylinder 2 fixed has only to have a function of regulating the running of the magnetic tape. The part projected in the tape running regulation lead plate 3 acts like a tape guide for the magnetic tape in press contact onto the rotary cylinder. Thus, small sized, thin profile and light weight is attained for a VTR, the head adjustment and replacement are simplified and the manufacture cost is reduced.

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