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1. 发明专利

JPH10275311A MAGNETIC RELUCTANCE EFFECT TYPE MAGNETIC HEAD AND MAGNETIC DISK DEVICE USING THE HEAD 失效
公开(公告)号：JPH10275311A
公开(公告)日：1998-10-13
申请号：JP7958897
申请日：1997-03-31
申请人： HITACHI LTD
发明人： SASADA YUKIO , TANIYAMA AKIRA , KATO ATSUSHI , SHIRAKI KIYONORI , KOYANAGI HIROAKI , IMANAKA RITSU
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To protect the structural film of read elements and to obtain a desired shape and a desired thickness by forming the protective pattern having the film, which has a high chemical resistivity and covers the difference-in-level section of the upper.lower shield film of the read elements located under a write element gap film in the process after the completion of a write element gap film forming. SOLUTION: After an upper section shield film 9 is formed and the processing of a read element section is completed, a write element gap film 10 is formed by an insulating film using the material such as alumina and a first insulating film 11, which is made of an organic insulating resin material, is then formed. During the process above, a protective pattern 17 is formed on the tilted surface and difference-in- level sections of the upper.lower shield film of the read element section to partially cover them. Then, a spiral conductive coil 12 is formed and a second insulating film 13, which is made of an organic insulating resin material, is formed. Then, an upper section magnetic film 14 is formed. Thus, the upper.lower section shield film is protected and the element process is finally completed by forming a protective film 15 made of alumina and a terminal 16.

2. 发明专利

JP2002008211A METHOD FOR MANUFACTURING THIN FILM MAGNETIC HEAD AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2002008211A
公开(公告)日：2002-01-11
申请号：JP2000189725
申请日：2000-06-20
申请人： HITACHI LTD
发明人： OKADA TOSHIHIRO , ETO KIMITOSHI , YOSHIDA NOBUO , TANAKA ATSUKO , SHIRAKI KIYONORI
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To manufacture a magnetic head having =20 Gbit/in2 surface recording density. SOLUTION: A phase shift mask in which a phase of a transmitted light through one electrode pattern is inverted to a phase of a transmitted light through the other electrode pattern is used as a reticle for forming the reproducing track width of the magnetic head of the magnetic disk device to form

3. 发明专利

JP2000048326A MAGNETO-RESISTANCE EFFECT TYPE HEAD ELEMENT ASSEMBLY AND ITS PRODUCTION 失效
公开(公告)号：JP2000048326A
公开(公告)日：2000-02-18
申请号：JP21684498
申请日：1998-07-31
申请人： HITACHI LTD
发明人： IMANAKA RITSU , SHIRAKI KIYONORI , SAITO HARUNOBU , AKIMOTO HAJIME , SASAKI SHINOBU , TAI YOSHIHARU
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To prevent insulation breakdown at the time of manufacturing a magneto- resistance effect type magnetic head element by allowing an assembly to have a first conductor in which respective magnetic shields of plural reproducing elements, respective magnetic poles of plural recording elements or respective magnetic shields of plural reproducing elements and respective magnetic poles of plural recording elements are electrically connected and a second conductor in which respective electrodes of plural reproducing elements are electrically connected to the first conductor. SOLUTION: A lower magnetic shield 3 and an upper magnetic shield 9 are electrically connected each other through the contact hole 33 of a lower gap film and an upper gap film and the upper magnetic shield 9 and an upper magnetic pole 13 are electrically connected each other through the contact hole 34 of a gap film for recording 10. In the electrode 6 of a reproducing element, a second conductor 52 in which one part of the electrode is extended is formed and the second conductor 52 is electrically connected to a first conductor 51. Since the first and second conductors are formed with the lower shield layer 3 being the lowermost layer of the constitution of a magneto-resistance effect type head element and an electrode layer, electrostatic breakdown to be generated between the layers is prevented.

4. 发明专利

JPH0887719A STOCK REMOVAL MONITOR DEVICE OF THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH0887719A
公开(公告)日：1996-04-02
申请号：JP22343894
申请日：1994-09-19
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： KIMURA ATSUSHI , SHIRAKI KIYONORI
IPC分类号： G11B5/31 , G11B5/127 , G11B5/187 , G11B5/455
摘要： PURPOSE: To easily detect the stock removal of the medium-facing surface of a thin-film magnetic head with high accuracy by increasing the change rate of the resistance value with the prescribed stock removal with monitors which detect the stock removal as a change in the resistance value. CONSTITUTION: Series circuits of the first thin-film resistors 1a (18a-1 to 1a-4) including the front ends 1a-3, 1a-4 which are disconnected when polished down to the prescribed distance S from a polishing surface P and the second and third thin-film resistors 2a, 3a which are two layers of higher resistance and are not affected by polishing are formed on a substrate (not shown in Fig.) to be formed with the thin-film head. The series circuits and the resistors 1a are connected in parallel by contacts 4 to 6. The resistance value between the legs 1a-1 and 1a-2 is increased largely stepwise by the high-resistance series circuits of the two-layered structure when the front ends are disconnected by polishing to the prescribed quantity, by which the polishing made to the specified quantity is detected. The plural monitors successively deepened in the position S to be disconnected are installed in parallel, by which the resistance value with the stock removal is changed stepwise.

5. 发明专利

JPH05159501A MAGNETIC HEAD 失效
公开(公告)号：JPH05159501A
公开(公告)日：1993-06-25
申请号：JP32286691
申请日：1991-12-06
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SHIRAKI KIYONORI , HORIGUCHI YASUSHI , UMAGOE YUKIMORI
IPC分类号： B21D5/01 , B23K26/06 , B23K26/073 , F16F1/02 , G11B21/21
摘要： PURPOSE:To provide a highly reliable magnetic disc unit wherein spring force can be regulated readily at high accuracy. CONSTITUTION:Under a state where a load spring 1 constituting a head is pushed down, a spring 2 is irradiated with a laser beam 4 to partially remove stress therefrom thus regulating the spring force. Alternatively, the spring part 2 is split to provide a slack part and irradiated wish a laser beam from lateral direction thus regulating the spring force.

6. 发明专利

JP2004158152A Recording-reproduction discrete type magnetic head and manufacturing method thereof 审中-公开
公开(公告)号：JP2004158152A
公开(公告)日：2004-06-03
申请号：JP2002324862
申请日：2002-11-08
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIRAKI KIYONORI , WATANABE SATOSHI
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To prevent deformation caused by halation at the time of forming an upper magnetic film of an induction type magnetic head, and to reduce resistance by making a spiral coil diameter small.
SOLUTION: A 1st spiral layer of a conductor coil 2a of Cu or the like is formed on a magnetic gap film 14 by a plating method. A 2nd spiral layer of a conductor coil 2b is formed thereon via an insulating film 4a. The 1st layer of the conductor coil 2a and the 2nd layer of the conductor coil 2b are jointed to each other at a contact part 3 in an inner circumferential part of the spirals and connected in series. SImultaneously with the formation of the 2nd layer of the conductor coil 2b, a dummy pattern (wall) 9 having almost as wide as the upper magnetic film 1 is formed between the contact part 3 and the rear end of the position where the upper magnetic film 1 is formed in the inner circumferential part of the spirals. Thereafter, the 2nd layer of the conductor coil 2b is covered with an insulating film 4b, and a plating substrate film 6 for forming the upper magnetic film 1 is formed on the insulating film 4b by sputtering or the like. A photo resist is applied on these laminated films, and a resist frame for forming the upper magnetic film 1 is formed by exposure.
COPYRIGHT: (C)2004,JPO

7. 发明专利

JPH10112008A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH10112008A
公开(公告)日：1998-04-28
申请号：JP26403996
申请日：1996-10-04
申请人： HITACHI LTD
发明人： IWASAKI TOMIO , DOI HIROAKI , YASUKAWA AKIO , SAITO NAOTO , IMANAKA RITSU , SHIRAKI KIYONORI
IPC分类号： G11B5/31
摘要： PROBLEM TO BE SOLVED: To realize high density, small size and fast access time by forming such a region in a joined part that the outer edge of a first joining face and the outer edge of a second joining face are directly joined without an insulating material interposed. SOLUTION: The outer edges 8, 9, 10 of the joining face of a first conductive layer 5 are exposed. Then a second conductive layer 7 such as copper having thin adhesive layers such as chromium on both surfaces is formed and etched through a mask 11 to obtain a direct joined structure between the whole joining face of the first conductive layer 5 and the whole joining face of the second conductive layer 7. By this method, a joined structure having no insulating material around the joined part of the first conductive layer 5 and the second conductive layer 7 can be obtd. and this joined part hardly causes peeling during heat treatment.

8. 发明专利

JPH1055518A THIN FILM MAGNETIC HEAD AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH1055518A
公开(公告)日：1998-02-24
申请号：JP24313096
申请日：1996-09-13
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS , HITACHI COMMUNICATION SYSTEM
发明人： FUKUMOTO TAKAYUKI , KARAKAMA YOSHIAKI , IMANAKA RITSU , SHIRAKI KIYONORI , YOSHIDA CHIKASHI , KAGAYA MASANORI , HATANAKA NORIAKI , MOCHIZUKI TAKEO
IPC分类号： G11B5/31 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To easily assemble a thin film magnetic head without complicating its structure and also to obtain electric discharge suppressing function. SOLUTION: This thin film magnetic head has a reading thin film magneto- resistive element composed of a magneto-resistive transducing part 8 held between two shield films 7 and 11, and at least one of the shield films is electrically connected with one of terminals 9 and 10 provided on both ends of the magneto-resistive transducing part 8. Then, a magnetic film 13 of a writing thin film magnetic transducing element may otherwise be electrically connected with one terminal, or the shield film(s) and the magnetic film may both be electrically connected with one terminal.

9. 发明专利

JPH0850707A THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPH0850707A
公开(公告)日：1996-02-20
申请号：JP18439794
申请日：1994-08-05
申请人： HITACHI LTD , HITACHI COMPUTER PERIPHERALS
发明人： SHIRAKI KIYONORI , KIMURA ATSUSHI
IPC分类号： G11B5/31
摘要： PURPOSE:To make a slider as small as a terminal size substantially and to increase the number of heads disposed on the same base, by disposing terminals so that they cover the upper layer of an electromagnetic conversion element part. CONSTITUTION:Terminals 2b and 2c are disposed on the upper layer of an electromagnetic conversion element part 3 so that they cover this part. The element part 3 comprises conductor coils 6 and a magnetic substance core 7. A conductor pattern 5 is formed in a layer on a coil lead-out part 4 and joined to each of the terminals 2b and 2c. The terminals 2b and 2c are insulated from the conductor coils 6 and the lead-out conductor 4 by an insulator 8, except the conductor pattern 5. The lead-out conductor 4 is formed outside the element part 3 or on it, and in either case, this conductor is joined to the terminals 2b and 2c on the element part 3.

10. 发明专利

JPS6462875A METHOD FOR ASSEMBLING FLOATING TYPE MAGNETIC HEAD 失效
公开(公告)号：JPS6462875A
公开(公告)日：1989-03-09
申请号：JP21781487
申请日：1987-09-02
申请人： HITACHI LTD
发明人： SHIRAKI KIYONORI , UMAGOE YUKIMORI , HARA SHIGEO , SHINOZAKI KAZUO , DAITO HIROSHI
IPC分类号： G11B21/21
摘要： PURPOSE:To adhere a core slider floating surface and a gimbal spring adhering surface so as to be parallel as much as possible and to reduce the dispersion of floating quantity by equalizing the thickness of an adhesive agent layer to adhere a gimbal spring and a core slider. CONSTITUTION:When a core slider 1 is adhered to a gimbal spring 2, adhesion is executed by directly applying pressure with >=2 pressurizing rods at >=2 spots from the back surface of the moving part of the gimbal spring 2, namely, from the opposite surface of the adhering surface of the core slider 1. These >=2 spots are selected so as to be in both sides of a dimple 6 formed to the gimbal spring 2, namely, of a turn supporting point. In order to directly pressurize the gimbal spring 2 from the back surface of the gimbal spring 2 and to adhere it to the core slider 1, a hole through which a pressurizing rod 4 passes is formed to a load arm supporting body 3. Thus, not only parallelism between the gimbal spring 2 and the core slider 1 but also the parallelism between the floating surface of the core slider 1 and the surface of a magnetic disk can be obtained.

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