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1. 发明专利

JPH05305570A 失效
公开(公告)号：JPH05305570A
公开(公告)日：1993-11-19
申请号：JP31453392
申请日：1992-11-25
申请人： HITACHI LTD
发明人： ITO YASUSHI , IMAMURA MASAAKI , KATO YOSHIKI , FUMIOKA JIYUN
IPC分类号： B24B21/00 , B24D3/00 , B24D11/00 , G11B5/84
摘要： PURPOSE:To polish projections on a magnetic disc surface with a high economic efficiency by forming an abrasive grain layer containing at least two kinds of abrasive grains different in hardness on a base member. CONSTITUTION:To grind projections on the surface of a magnetic disc with a high economic efficiency, polishing is conducted not with a necessary condition of chip pocket but by using a lapping tape having an abrasive grain layer having diamond abrasive grains 4 scattered in Al2O3 abrasive grain groups 3. To more precisely finish the surface without giving a working flaw on the surface, a lapping tape having chip pockets 2 in the abrasive grain layer 3 is used for polishing. Thus, projections on the magnetic disc surface can be polished with a high economic efficiency. Since the magnetic disc surface can be highly precisely worked, the float of a magnetic head can be reduced.

2. 发明专利

JPH0349859A METHOD FOR DETECTING GRINDING SPEED AND FOR TAPE GRINDING WORK, AND METHOD AND DEVICE FOR MANUFACTURING MAGNETIC DISK 失效
公开(公告)号：JPH0349859A
公开(公告)日：1991-03-04
申请号：JP18463389
申请日：1989-07-19
申请人： HITACHI LTD
发明人： KAWAMURA YOSHIO , KAWAKUBO YOICHI , HORIUCHI YASUAKI , FUMIOKA JIYUN , ITO YASUSHI , MORITA KENJI
IPC分类号： B24B21/00 , G11B5/84
摘要： PURPOSE:To discriminate a work condition for whether it is good or bad in the real time without performing sampling inspection of work-finished disks by measuring a work residual quantity by a grinding means and specifying a work speed with a grinding condition for a workpiece. CONSTITUTION:A workpiece (magnetic disk) 1 is ground by grinding tapes 9, and a work residual quantity, which adheres to a position of these grinding tapes 9, is measured as a quantity of light from a light receiver 11 and displays for the work time. A work speed is grasped by measuring a contact time of the grinding tape 9 with the workpiece under a condition not more than the adhering saturation time of work residue to this grinding tape 9, and a work condition is discriminated for whether it is good or bad by the real time.

3. 发明专利

JPS6466820A PRODUCTION OF MAGNETIC DISK MEDIUM 失效
公开(公告)号：JPS6466820A
公开(公告)日：1989-03-13
申请号：JP22193887
申请日：1987-09-07
申请人： HITACHI LTD
发明人： SAKAGUCHI ISAO , ITO YASUSHI
IPC分类号： G11B5/84
摘要： PURPOSE:To easily obtain the arbitrary thickness profile of finish films by subjecting the working pressure distribution in the radial direction of media to feedback control. CONSTITUTION:A pressurizing head is constituted of a roller section 3 which is wound with plural pieces of hollow rubber rollers 3 having hollow chambers 7 on mandrels 6 and connected with fluid supply holes 8 for supplying fluid to the hollow chambers 7, a holder 9 which holds the rollers 3 and micrometers 4 which micrometrically adjust the inclination of the magnetic disk medium 1 and the rollers 3. The arbitrary working pressures are easily obtd. in the respective radial positions of the medium 1 when the working pressures P1, P2,...Pn in the respective hollow chambers 7 are changed. The working pressure distribution is determined by inputting the thickness profile of the coated film thicknesses and the result of the measurement is fed back to a calculation section in spite of the generation of a fluctuation in the thickness of the coated films so that the adjustment of the working pressures is automatically executed. The fluctuation in the thickness of the coated films is thereby suppressed.

4. 发明专利

JPS6399170A POLISHING DEVICE 失效
公开(公告)号：JPS6399170A
公开(公告)日：1988-04-30
申请号：JP24292586
申请日：1986-10-15
申请人： HITACHI LTD
发明人： KAWAMURA YOSHIO , KAWAKUBO YOICHI , KANETOMO MASABUMI , MORITA KENJI , KATO SHIGEO , FUMIOKA JIYUN , ITO YASUSHI
IPC分类号： B24B21/00
摘要： PURPOSE:To enable a device to efficiently perform polishing using polishing tapes of large width, by providing a means, which pressurizes a back surface of the polishing tape with desired distribution, and performing the polishing to be controlled so that its speed obtains a desired value. CONSTITUTION:Polishing tapes 2, 12, wound by winding mechanisms 5, 15, are arranged on a picture of a magnetic disc 1, which is a work, further held by pressurizing parts 3, 13. These pressurizing parts 3, 13, providing two rows of three throttle holes 32 to be drilled over the magnetic disc 1 from its internal peripheral p[arts Ri to peripheral part Ro, form a pressurizing chamber 31 on a surface brought into contact with the polishing tapes 2, 12 in the bottom end of said holes, and a polishing device, which respectively introduces fluid pressures P1-P6 suitably set by a pressurizing force regulating system 4, uniformly presses the polishing tapes 2, 12 to the magnetic tape 1. Under this condition, the device, rotating the magnetic disc 1 in a desired rotary speed, performs polishing. In this way, a surface of optional shape of the work can be efficiently further high accurately polished by using the polishing tape of large width.

5. 发明专利

JPS6368351A FLOATING POLISHING DEVICE 失效
公开(公告)号：JPS6368351A
公开(公告)日：1988-03-28
申请号：JP21065886
申请日：1986-09-09
申请人： HITACHI LTD
发明人： SUZUKI SHOJI , IMAMURA MASAAKI , ITO YASUSHI , OTANI YUICHI , KAWAMURA YOSHIO , TSUCHIYAMA RYUJI
IPC分类号： B24B21/00 , G11B5/84
摘要： PURPOSE:To allow only abrasive grains to contact the minute projections on the surface of a ground article by forming a fluid film between a grinding basic member and the ground article and preventing the abrasive grains from always contacting the ground article and allowing the basic member in the floating-up state to approach the ground article by a loading means. CONSTITUTION:The grinding sheets 1 installed onto the right and left rotors 6 in pairs are positioned onto the both surfaces of a magnetic disc 3 mounted onto a hollow spindle 5. Then, the disc 3 and the sheets 1 are relatively revolved in the noncontact state by the fluid film which is formed through the supply from a fluid feeding means 8 and shown by the arrow. The abrasive grains 2 held on the sheet 1 are attached onto the minute projections of the alumina particles on the disc 3 surface by the load application onto each surface of the sheet 1 by a pressing body 4. Then, only the alumina particles are ground, and a disc having a superfine clean surface can be obtained, suppressing the binder of the sheet 1 from being destroyed.

6. 发明专利

JPS6348678A SURFACE CLEANING DEVICE 失效
公开(公告)号：JPS6348678A
公开(公告)日：1988-03-01
申请号：JP19054086
申请日：1986-08-15
申请人： HITACHI LTD
发明人： SUZUKI SHOJI , ITO YASUSHI
IPC分类号： B08B7/04 , G11B23/50 , H01L21/304
摘要： PURPOSE:To remove fine dust and to prevent a secondary contamination by designing the titled cleaner that an adhesive belt is allowed into contact with the surface of a member to be cleaned to adhere and catch dust and the dust adhered to the adhesive belt is removed by a cleaning tank. CONSTITUTION:The adhesive belts 8, 8a are driven by driving rollers 4, 4a. The adhesive belts 8, 8a are allowed into contact with the surface of a magnetic disk 1 by pressing rollers 3, 3a supported via a pressing means 2. The adhesive belts 8, 8a are led respectively to cleaning tanks 7, 7a each having an ultrasonic wave oscillator 5 and a circulating filter 6, where the caught dust is rinsed and removed. The adhesive belts 8, 8a after rinsing are fed to the surface of the magnetic disk 1 by the driving rollers 4, 4a again.

7. 发明专利

JPS61117490A Device for remodeling and inspecting inside of pressure vessel for nuclear reactor 失效
标题翻译：用于重核和检查用于核反应堆的压力容器内部的装置
公开(公告)号：JPS61117490A
公开(公告)日：1986-06-04
申请号：JP23841784
申请日：1984-11-14
申请人： Hitachi Ltd
发明人： ITO YASUSHI , YAMAGUCHI MAKOTO , NARUSE AKISUKE
IPC分类号： G21C17/003 , G21C17/00 , G21C19/02 , G21C19/20 , G21F3/00

8. 发明专利

JPS6180619A Substrate for magnetic disk 失效
标题翻译：磁盘基板
公开(公告)号：JPS6180619A
公开(公告)日：1986-04-24
申请号：JP20173584
申请日：1984-09-28
申请人： Hitachi Ltd
发明人： ITO YASUSHI , IMAMURA MASAAKI , KATO YOSHIKI
IPC分类号： G11B5/82 , G11B5/73 , G11B5/733
摘要： PURPOSE: To obtain the titled lightweight substrate for a magnetic disk while keeping high rigidity by mixing a whisker into an aluminum alloy.
CONSTITUTION: Although an aluminum alloy sheet is widely used as the substrate for a magnetic disk, a coarse intermetallic compd. is formed between aluminum and an impurity element Fe which is contained in the sheet in a small amt., and the compd. is the prime cause of a bit error when the substrate is used for a magnetic disk. When the content of the impurity element Fe is reduced in high-purity aluminum, the mechanical strength is decreased. When a silicon carbide whisker 3 having 0.01W0.3μm diameter is mixed into a high- purity aluminum alloy 2 contg. ≤0.01% impurity element Fe and which is used as a substrate 1 for a magnetic disk, the tensile strength is increased as the volume ratio of the whisker is increased. Accordingly, even when the substrate 1 for a magnetic disk is thinned and made lightweight, high rigidity can be maintained.
COPYRIGHT: (C)1986,JPO&Japio
摘要翻译：目的：通过将晶须与铝合金混合，获得标准的轻质磁盘基板，同时保持高刚性。构成：虽然铝合金板被广泛用作磁盘的基板，但是粗的金属间化合物。形成在铝和杂质元素Fe之间，该杂质元素Fe以小的形式包含在片材中。是当基板用于磁盘时的误差的主要原因。当杂质元素Fe的含量在高纯度铝中降低时，机械强度降低。当将具有0.01-0.3μm直径的碳化硅晶须3混合到高纯度铝合金2中时， <= 0.01％的杂质元素Fe，其用作磁盘的基板1，拉伸强度随着晶须的体积比增加而增加。因此，即使当用于磁盘的基板1变薄并且重量轻时，也可以保持高刚性。

9. 发明专利

JP2002184153A HEAD UNIT AND MAGNETIC DISK DEVICE 失效
公开(公告)号：JP2002184153A
公开(公告)日：2002-06-28
申请号：JP2000384894
申请日：2000-12-13
申请人： HITACHI LTD
发明人： ARAKI SEIICHI , ITO YASUSHI , SUZUKI MASAYUKI
IPC分类号： G11B23/50
摘要： PROBLEM TO BE SOLVED: To prevent damages of a magnetic head and a magnetic disk by removing dust adhered from a recording/reproduction area on the surface of the magnetic disk to an outer area in a magnetic disk device. SOLUTION: Suspension to support the magnetic head is provided with the magnetic head to perform a normal recording/reproducing operation and a cleaning head for the purpose of removal of the dust and the magnetic head temporarily stops in time at least over one rotation in the vicinity of inner and outer peripherals of the recording/reproduction area on the magnetic disk or performs a seek operation before the magnetic head to complete the normal recording/reproducing operation is retreated on a magnetic head holding member from the surface of the magnetic disk. In this case, the cleaning head is placed in an area outer than the recording/reproduction area on the magnetic disk and thoroughly removes the dust adhered on the magnetic disk surface.

10. 发明专利

JP2001254776A VIBRATION INTERRUPTING DEVICE AND EQUIPMENT USING THIS VIBRATION INTERRUPTING DEVICE 失效
公开(公告)号：JP2001254776A
公开(公告)日：2001-09-21
申请号：JP2000072454
申请日：2000-03-10
申请人： HITACHI LTD , HITACHI VIA MECHANICS LTD
发明人： KURIHARA MASAKI , HORIUCHI TOSHIHIKO , OOTAKE IKUMORI , ITO YASUSHI
IPC分类号： G03F7/20 , F16F7/00 , F16F15/02 , H01L21/027
摘要： PROBLEM TO BE SOLVED: To make transmission markedly reducible of excitation force to a floor from an equipment main unit, so that transmission of excitation force can be reduced by changing rigidity of an elastic material corresponding to a vibration in a condition supporting the equipment main unit, in a vibration interrupting device and an equipment using this vibration interrupting device. SOLUTION: In this vibration interrupting device 3, provided between an equipment main unit 2 having an excitation source and a floor 1, and the equipment using this vibration interrupting device, a variable rigidity device 6 having an elastic member 12 elastically supporting the equipment main unit 2 and a rigidity change means 37 variably controlling rigidity of this elastic member 12 and an inertia force generating device 39 provided in parallel to this variable rigidity device 6 are provided.

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