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公开(公告)号：DE68910565D1
公开(公告)日：1993-12-16
申请号：DE68910565
申请日：1989-04-05
Applicant: IBM
Inventor： AOYAGI AKIHIKO , ENDO TATSUYA , TERASHIMA HIROSHI
Abstract: A flanged load beam (10;20) in a transducer head suspension assembly is provided with reinforcement means (7;8) which does not increase the height of the load beam. The reinforcement means can be in the form of longitudinal ribs (7) disposed between the flanges (6). The reinforcement means can also be provided by bending over the flanges (6) to form wings (8). Alternatively, the flanges can be bent over towards the centre of the load beam. Provision of such reinforcement means enables the overall height of the load beam to be reduced.
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公开(公告)号：DE68910565T2
公开(公告)日：1994-05-11
申请号：DE68910565
申请日：1989-04-05
Applicant: IBM
Inventor： AOYAGI AKIHIKO , ENDO TATSUYA , TERASHIMA HIROSHI
Abstract: A flanged load beam (10;20) in a transducer head suspension assembly is provided with reinforcement means (7;8) which does not increase the height of the load beam. The reinforcement means can be in the form of longitudinal ribs (7) disposed between the flanges (6). The reinforcement means can also be provided by bending over the flanges (6) to form wings (8). Alternatively, the flanges can be bent over towards the centre of the load beam. Provision of such reinforcement means enables the overall height of the load beam to be reduced.
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公开(公告)号：JPH08279264A
公开(公告)日：1996-10-22
申请号：JP7521395
申请日：1995-03-31
Applicant: IBM
Inventor： TSUCHIDA HIROYASU , AOYANAGI AKIHIKO , ENDO TATSUYA
Abstract: PURPOSE: To facilitate a signal wire connection at a top end of load beams in a disk memory device. CONSTITUTION: A flange 26 has a bent part 30. This bent part 30 has a structure bent from a middle portion of a rising part of the flange 26 to further an outside of load beams. A bending width in the flange of this bent part 30 is structured so as to be gradually increased as approaching the top end, and at the top end, the flange 26 has substantially the same face as a base plane 24 of load beams 14, and the top end is structured so as to have a rising part and is connected to a signal exchange head 10 without unwillingly bending a signal wire 20. Accordingly, a vertical flange at the top end of load beams is removed, whereby a connection work region of the signal wire 20 is widened so that the connection works of the signal wire is facilitated.
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Patent Agency Ranking4.发明专利
公开(公告)号：JP2001243611A
公开(公告)日：2001-09-07
申请号：JP2000047042
申请日：2000-02-24
Applicant: IBM
Inventor： SUZUKI HIROMASA , UMEMURA KAORU , SHIBATA AKIRA , ENDO TATSUYA , MATSUI TAKAO , IKEDA MASAOMI , HASHIMOTO JUNJI
Abstract: PROBLEM TO BE SOLVED: To reduce reproduction errors by improving the setting accuracy of a reproduction offset generated between the recording head and the reproducing head of a compound type head part. SOLUTION: The recording head records a test pattern on a plurality of tracks to be measured (S2), the amplitude of a regenerative signal by the reproducing head is measured at a plurality of different tracking positions about the respective tracks to be measured (S5), the approximate expression of a profile of the measured amplitude with respect to the tracking positions is found (S6), a position where a maximum value is given in the approximate expression is calculated as a tracking position at which the amplitude of the regenerative signal is maximum, a reproduction offset is calculated on the basis of the tracking position with the maximum amplitude (S7), and the reproduction offset of an optional track is set in a disk device on the basis of the reproduction offset about the tracks to be measured (S10).
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公开(公告)号：JPH09167303A
公开(公告)日：1997-06-24
申请号：JP33030095
申请日：1995-12-19
Applicant: IBM
Inventor： OKADA KENJI , ARAI KOICHI , TSUNODA HISASHI , SUZUKI HIROMASA , SASAKI MASAKAZU , KIHASHI AKIRA , ENDO TATSUYA
Abstract: PROBLEM TO BE SOLVED: To eliminate generation of thermal asperity and to avoid generation of error by making head vibration have a directional component approaching the disk surface. SOLUTION: When an error is generated, a vibration signal from a means 52 is superposed on a signal from a controller 43 by a direction of HDC and supplied to a VCM driving means 45. And a head 20 is positioned at a desired position according to thermal asperity position. By providing the VCM 46 with a vibration signal, a head assembly starts rolling movement centering the joint point with a dimple. And the head assembly generates vertical vibration with a frequency equivalent to the given vibration signal frequency, and eliminate the thermal asperity on the disk.
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公开(公告)号：JPH01277380A
公开(公告)日：1989-11-07
申请号：JP9847788
申请日：1988-04-22
Applicant: IBM
Inventor： AOYANAGI AKIHIKO , ENDO TATSUYA , TERAJIMA HIROSHI
Abstract: PURPOSE: To provide load beams having a small height size and excellent mechanical characteristics and to increase the number of sheets of the disks to be mounted and the number of heads by juxtaposing the side edges of these beams with reinforcing materials having the height not exceeding the height of the side edges nearly parallel therewith. CONSTITUTION: A base part 5 is provided with drawn rib parts 7 as the reinforcing members and the side edges 6 are bent nearly perpendicular to the plane of this base part 5. The side edges 6 are juxtaposed with these drawn rib parts 7 nearly parallel therewith at the height not exceeding the height of the side edges 6. The head suspension load beams 10 are coupled to a head actuator arm 9 by means of a mounting block 4. Then, the mechanical characteristics and more particularly rigidity of the load beams are not impaired even if the height size of the load beams is reduced to half the min. value of the conventional beams. As a result, the number of the sheets of the disks to be mounted and the number of the heads are increased without increasing the height size of the magnetic disk device.
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公开(公告)号：JPH11191201A
公开(公告)日：1999-07-13
申请号：JP35689697
申请日：1997-12-25
Applicant: IBM
Inventor： SUZUKI HIROMASA , KURACHI KOJI , SUDA KATSUMI , ASANO HIDEO , OKADA KENJI , TAKASE MAKOTO , KIHASHI AKIRA , NISHINOMIYA HIROMI , MATSUI TAKAO , ENDO TATSUYA , KUROKI KENJI
Abstract: PROBLEM TO BE SOLVED: To improve the performance of an information recording/reproducing device using a GMR(giant magnet resistance) sensor. SOLUTION: This method aims at the restoration of an operating error generated in an information recording/reproducing device including a storage medium, a head using a GMR sensor, an actuator arm for mounting the head and locating the head on a prescribed position on the front surface of the storage medium and a control part for controlling the operation of the actuator arm and read/write operation. At this time, it comprises a step for executing a first error restoring procedure 103, a step for executing a first GMR evaluating procedure 109 for evaluating the performance of the GMR sensor when the operating error is not restored in the first error restoring procedure and a step 117 for impressing a reset pulse to the GMR sensor in accordance with the first GMR evaluating procedure.
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8.发明专利
公开(公告)号：JPH11195210A
公开(公告)日：1999-07-21
申请号：JP35791297
申请日：1997-12-25
Applicant: IBM
Inventor： MATSUI TAKAO , ENDO TATSUYA , SUZUKI HIROMASA , YAMAGUCHI KATSUJI , KUROKI KENJI , ASANO HIDEO
Abstract: PROBLEM TO BE SOLVED: To provide the method in which an initialization of a great magneto resistance(GMR) head and a reset are executed and to provided the device for executing the method. SOLUTION: The yield of the GMR head is improved by executing the initialization, in which the magnetization direction of the free layer of the GMR head (mounted on the hatched surface of a slider 14) is directed by an external magnetic field, and is executed in the opposite direction again. Moreover, a discrimination is made to determine whether the magnetization direction of a pin stopping layer of the head is temporarily reversed or not and damaged GMR head is selected in an early stage. Then, the magnetization direction of the layer is returned in a positive direction, a semi-static test is conducted to check the reproduced response of the head and a safe efficient reset is executed. The reset is conducted by not only applying a pulse but also is executed while applying an external magnetic field in the pin stopping direction or only applying a strong magnetic field. Note that a tool 500 is commonly used throughout the process levels for an initialization, a reset and a reproducing response.
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