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1. 发明专利

JP2001006141A MANUFACTURE OF MAGNETIC HEAD 失效
公开(公告)号：JP2001006141A
公开(公告)日：2001-01-12
申请号：JP17333799
申请日：1999-06-18
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： G11B5/31 , G11B5/10 , G11B5/60
摘要： PROBLEM TO BE SOLVED: To manufacture a magnetic head in a fine size such as a femtoslider with high precision and satisfactory yield. SOLUTION: In this method for manufacturing a magnetic head for forming a magnetic head element by forming a magnetic film or the like on the surface of a substrate by a wafer process, a wafer 50 whose thickness dimension is longer than the length dimension of a slider is used as the substrate, and a magnetic film or the like is formed on the substrate, or the thickness of the wafer 50 in a state that the back face of the substrate is ground after the magnetic film is formed on the substrate is set so as to be thicker than the length dimension of the slider, and then low bars 52 are segmented from the wafer 50, and prescribed working is carried out to the low bars 52 so that the slider can be formed.

2. 发明专利

JP2000187819A MANUFACTURE OF MAGNETIC HEAD ELEMENT 失效
公开(公告)号：JP2000187819A
公开(公告)日：2000-07-04
申请号：JP36266798
申请日：1998-12-21
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： G11B5/187 , G11B5/31 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a method for the formation of an ELG element terminal for magnetic head machining which can increase the number of obtained magnetic head elements by making ELG element formation width narrower. SOLUTION: A bar body having magnetic head elements 12 and ELG elements 14 formed alternately and adjacently is polished while the resistance values of the sensing parts of the ELG elements 14 are monitored and after the polishing, the ELG element parts 14 are cut always to separate the individual magnetic head elements 12: and a lead-out layer 32 connected to the sense part of an ELG element 14 is connected to the nearby internal lead-out layer 42 of an adjacent magnetic head element 12 through a connection part 52 and a pad 20b for external connection which is formed on the top surface of a lead-out terminal column 41 near an ELG element 14 and is connected to the internal lead-out layer 42 and the monitor pad 22a of the ELG element 14 are connected through a connection part 51 to use the terminal column 41 for both the magnetic head 12 and ELG element 14.

3. 发明专利

JPH10286766A THIN FILM ELEMENT AUTOMATIC LAPPING METHOD AND DEVICE THEREOF 失效
公开(公告)号：JPH10286766A
公开(公告)日：1998-10-27
申请号：JP9247997
申请日：1997-04-10
申请人： FUJITSU LTD
发明人： SUGIYAMA YUICHI , WATANUKI KIICHI , YOKOI KAZUO , YANAGIDA YOSHIAKI , SUDO KOJI
IPC分类号： B24B37/013 , B24B37/07 , B24B49/02 , G11B5/31 , B24B37/04
摘要： PROBLEM TO BE SOLVED: To correctly measure a value of resistance, and to improve the working accuracy, by converting a value of resistance of a monitor element into the height of a thin film element, and stopping the lapping work by a lapping machine, in response to the reaching of the height of the thin film element to a target value. SOLUTION: When a value of resistance of a working monitor resisting element (ELG element) of a rover 101, becomes a specific value, the working is stopped. The stopping of the lapping work is performed by stopping a lapping machine. An unload cylinder 120 is operated when the value of resistance of the working monitor becomes the specific value, to project an unload block 121. Whereby an adaptor 11 is rotated around a support part 110a, to separate a work 103 from the lap surface plate 104. That is, the lap working is immediately stopped when the value of resistance of the working monitor becomes the specific value. Whereby the accuracy in size of the work can be improved. Further by installing the adaptor 11, the unloading can be easily performed.

4. 发明专利

JPH05111867A WORKING METHOD FOR WORK WITH MUTLI-GRINDING WHEEL 失效
公开(公告)号：JPH05111867A
公开(公告)日：1993-05-07
申请号：JP27548391
申请日：1991-10-23
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI , TSUKAMOTO TETSUYA
IPC分类号： B24B19/00 , B24B19/02
摘要： PURPOSE:To provide a working method for a work with a multi-grinding wheel which can carry out cutting work with high accuracy using the multi-grinding wheel provided with a plurality of rotating grinding wheels even in the case of cutting work of a projected streak surface with the extremely narrow width on a plane of the work with the multi-grinding wheel having a plurality of rotating grinding wheels. CONSTITUTION:In a method of cutting work of a plurality of a projected streak surface 4 with a predetermined width 'w' on a plane of a work 3 with a multi- grinding wheel 2 having a plurality of rotating grinding wheel 1, first, cutting work is done for one side edge 4a of the plurality of projected surfaces 4 with the rotating grinding wheel 1 forming the multi-grinding wheel 2, and then, the rotating grinding wheel 1 is separated from the one side edge 4a of the projected streak surface 4, the multi-grinding wheel 2 or the work 3 is moved by a predetermined amount and cutting work is carried out on the other edge 4b of the projected streak surface 4 with the rotating grinding wheel 1.

5. 发明专利

JPH02236821A PRODUCTION OF MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPH02236821A
公开(公告)日：1990-09-19
申请号：JP5810389
申请日：1989-03-10
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： G11B5/84
摘要： PURPOSE:To reduce variation in coefft. of friction and to increase the life of the medium by forcibly impregnating a porous magnetic coating film formed on a nonmagnetic substrate with a lubricant to the over-saturation amount and then wiping off the excess lubricant. CONSTITUTION:The medium 3 coated with the lubricant to the over-saturation amount is rotated in a specified speed, on which a tape 10 made of dust-free cloth is pressed by a slider at a specific pressure, while an imprinting device 7 is moved back and force in the radius direction of the medium. Thereby, the lubricant provided on the surface of the magnetic coating film is forced to permeate in the pores of the coating film, so that the pores hold the saturation amount of the lubricant. The tape of dust-free cloth 10 is unwound from the unwinding roll 11 to supply constantly a new tape to a slider 9 while the used tape 10 is wound up by the winding roll. Thus, the excess lubricant on the magnetic coating film is wiped off.

6. 发明专利

JPS6089824A MANUFACTURE FOR MAGNETIC DISC 失效
公开(公告)号：JPS6089824A
公开(公告)日：1985-05-20
申请号：JP19862783
申请日：1983-10-24
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： G11B5/82 , G11B5/842
摘要： PURPOSE:To control simply the layer thickness of magnetic paint on a disc base by providing a process dropping a paint, a leaving process and a layer thickness measuring process so as to control the leaving period depending on the measured layer thickness. CONSTITUTION:If the viscosity of paint is changed due to secular change in coating the magnetic paint through the turning of the base, the layer thickness is changed. Then the process F1 dropping the paint, the leaving period and the process F6 measuring the paint layer thickness after the end of the drying process F5 are provided. In making the measured layer thickness thicker, the shaking off time of the shaking-off process F3 is prolonged so as to increase the amount of removal. When the layer thickness is a specified value or below, after the paint is dropped at the dropping process F1, the leaving period is taken longer. The layer thickness is controlled simply by controlling the layer thickness of the paint, not by the number of revolutions of the base but by the leaving period, i.e., drying state in this way.

7. 发明专利

JP2001134902A DEVICE AND METHOD FOR POLISHING BAR-LIKE BODY USED FOR MAGNETIC HEAD 失效
公开(公告)号：JP2001134902A
公开(公告)日：2001-05-18
申请号：JP31567499
申请日：1999-11-05
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI , MATSUSHITA NAOHISA
IPC分类号： B24B7/22 , B24B49/04 , B24B49/10 , B24B49/16 , G11B5/127 , G11B5/187 , G11B5/31 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a polishing device for a bar-like body used for a magnetic head, capable of performing highly accurate polishing. SOLUTION: This polishing device for a bar-like body used for a magnetic head is constructed in such a manner that a bar-like body 22 having a magnetic head element part 22a and an ELG element part 22b formed is polished while monitoring the resistance value of the sensing part of the ELG element part 22b, and the strip height of the magnetic head element part 22a is adjusted, This device is provided with a holding means 20 for holding the bar-like body 22 with its first surface to be polished set down, and an actuator 30 for pressing the first surface of the bar-like body 22 to a lapping surface plate 32 by pressing a second surface opposite the polished surface of the bar-like body 22 held by the holding means 20 directly or via a flexible film 36.

8. 发明专利

JPH10286767A LAPPING DEVICE 失效
公开(公告)号：JPH10286767A
公开(公告)日：1998-10-27
申请号：JP9243497
申请日：1997-04-10
申请人： FUJITSU LTD
发明人： YANAGIDA YOSHIAKI , YOKOI KAZUO , SUDO KOJI , WATANUKI KIICHI , SUGIYAMA YUICHI
IPC分类号： B24B37/04 , B24B37/30 , G11B5/31 , G11B5/48
摘要： PROBLEM TO BE SOLVED: To lap a work with high accuracy by mounting the work on an adaptor supported by a lap base, and moving a working face of the work independently from a working face of a lap base. SOLUTION: A lap surface plate 104 is rotated by a motor, and a lap base 10 comprises six bearing surfaces 111 on a lower face. The lap base 10 comprises a pressurizing mechanism 13 for pressurizing an adaptor 11, the adaptor 11 has the almost L-shape, and a work 103 (101) is mounted on a first face 11a of the adaptor. Further the work 103 is fixed to the first face 11a by a work fixing jig 112, and the second face 11b is mounted on the adaptor 11. A support mechanism installed on the lap base 10 comprises a height adjusting screw 110b, and a receiving part 113 of the adaptor 11 is engaged with a spherical support part 110a.

9. 发明专利

JPH0419064A LAPPING METHOD 失效
公开(公告)号：JPH0419064A
公开(公告)日：1992-01-23
申请号：JP12180090
申请日：1990-05-11
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： B24B37/07 , B24B37/10
摘要： PURPOSE:To prevent the generation of scratches on the machined face of a work by cutting off the transmission of a clutch means before the stoppage of the inertial rotation of a lapping surface table at least upon the termination of lapping so as to cut off power transmission between the work holding jig and its drive source. CONSTITUTION:The lapping of a work W is performed by rotating a lapping surface table 1 and a work holding jig 2 in the steady state. Upon terminating this lapping, a clutch means C is controlled before stopping the lapping surface table 1 so as to detach the work holding jig 2 from its drive source M. The work holding jig 2 is thereby placed in the free state so as to prevent its action as braking force against the inertial rotation of the lapping surface table 1 and therefore to prevent the generation of scratches on the machined face of the work W.

10. 发明专利

JPH03125309A MANUFACTURE OF THIN FILM MAGNETIC HEAD 失效
公开(公告)号：JPH03125309A
公开(公告)日：1991-05-28
申请号：JP26551389
申请日：1989-10-11
申请人： FUJITSU LTD
发明人： WATANUKI KIICHI
IPC分类号： G11B5/31 , G11B5/23
摘要： PURPOSE:To obtain highly accurate gap depth by grinding by providing an element for gap depth confirmation at a block cutting position and measuring the gap depth of the element for confirmation when a wafer is cut into blocks. CONSTITUTION:When thin film magnetic head element 3 are formed on the wafer 16a, the element 20 for confirmation which has the same structure with the elements 3 is provided in the same array with the elements 3. When the block 17 is cut, the element 20 for confirmation is cut, and when the magnetic head element 3 which is cut in the state of the block 17a is grounded to specific necessary gap depth, the gap depth start point A of the element 20 for confirma tion is found from the sectional shape of the element 20 for confirmation which appears in the cut surface, thereby a gap-depth worked surface 19 is grounded based upon the position of the start point A of the gap depth.

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