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41. 发明专利

JP2001266323A MAGNETIC HEAD SLIDER 失效
公开(公告)号：JP2001266323A
公开(公告)日：2001-09-28
申请号：JP2000079272
申请日：2000-03-16
申请人： HITACHI LTD
发明人： JO KINKOKU , TOKISUE HIROMITSU , TSUCHIYAMA RYUJI
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent the damaging of a magnetic disk and a slider caused by the incursion of the head-disk interface of a foreign object such as dust. SOLUTION: By providing angles in both side wall surfaces of the flow-out pad surface of a slider, the damaging of the slider and the magnetic disk caused by the accumulation or incursion of foreign objects such as dust is prevented.

42. 发明专利

JP2001229519A SLIDER AND RECORDER 失效
公开(公告)号：JP2001229519A
公开(公告)日：2001-08-24
申请号：JP2000039730
申请日：2000-02-14
申请人： HITACHI LTD
发明人： TOKISUE HIROMITSU , TANI KOUJI , TOKUYAMA MIKIO , JO KINKOKU , TSUCHIYAMA RYUJI
IPC分类号： G11B5/48 , G11B5/58 , G11B5/60 , G11B21/20 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To realize the floating amount of 5 nm by bringing a head element into contact with the surface of a recording medium, and maintaining contact stably. SOLUTION: A slider having a head element for recording/reproducing information in a recording medium is provided with plural pads having level differences, and the height of the pad having the head element among the pads is set to be lower than those of the other pads. Thus, the pads other than the head element loaded pad are floated, and the head element is brought into stable contact with a disk surface by the meniscus attractive force of disk lubricants and a damping operation.

43. 发明专利

JP2000251431A MAGNETIC HEAD SUPPORT MECHANISM AND MAGNETIC DISK DRIVE 失效
公开(公告)号：JP2000251431A
公开(公告)日：2000-09-14
申请号：JP5661899
申请日：1999-03-04
申请人： HITACHI LTD
发明人： TOKUYAMA MIKIO , KATO YUKIO , TOKISUE HIROMITSU , MATSUNO JUNICHI
IPC分类号： G11B5/48 , G11B5/54 , G11B5/60 , G11B21/12 , G11B21/21 , G11B21/22
摘要： PROBLEM TO BE SOLVED: To prevent the gimbal of a suspension from deforming to damage at the time of unloading by composing the suspension of the gimbal and a load beam and providing a 1st tab on the tip side of the load beam and a 2nd tab on the tip side of the gimbal. SOLUTION: The 1st tab 24 is provided at the top of the load beam 22 without contacting and the 2nd tab 30 is provided on the reverse side of the 1st tab 24 similarly. Here, the 2nd tab 30 is shorter than the 1st tab 24. When a disk is stationary, the 1st tab 24 receives a peeling force F1 by a 1st lamp 52 and the 2nd tab 30 receives a peeling force F2 by a 2nd lamp 53, so that they are unloaded from a disk surface. Even when a negative pressure slider is used, the slider 40 is left on the disk surface 1 at the time of unloading by the 2nd tab 30 and 2nd lamp 53, so that the flexible finger part 26 of the gimbal 31 will not be deformed large.

44. 发明专利

JPH11134626A PRODUCTION OF MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH11134626A
公开(公告)日：1999-05-21
申请号：JP29669997
申请日：1997-10-29
申请人： HITACHI LTD
发明人： YOSHIMURA YASUHIRO , AONO TAKANORI , IKEDA YUKIKO , ENDO KIJU , TOKISUE HIROMITSU , YONEKAWA SUNAO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To prevent spacing loss and the sticking of a slider to a magnetic disk by producing the slider by coating with a fluorine-contg. compd. and irradiation with UV-contg. light. SOLUTION: In the production of a magnetic disk device with a magnetic head which performs the recording and reproduction of data to a magnetic disk 1 with a lubricant formed on the surface and a slider mounted with the magnetic head and confronting the magnetic disk, at least the surface of a slider confronting the magnetic disk is irradiated with argon plasma, coated with a fluorine-contg. compd. and dried by heating or irradiated with UV to produce the objective slider. Since the surface material of the slider is activated by irradiated with the argon plasma, bonding to the fluorine-contg. compd. is made tighter and the surface of the slider is made irregular. The lubricant or grease on the magnetic disk comes is contact with only the irregularities of the slider and oil repellency increases.

45. 发明专利

JPH10320944A MAGNETIC DISC DEVICE 失效
公开(公告)号：JPH10320944A
公开(公告)日：1998-12-04
申请号：JP13248297
申请日：1997-05-22
申请人： HITACHI LTD
发明人： TANAKA HIDEAKI , TOKISUE HIROMITSU , HIGASHIYA TERUYOSHI
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To utilize the whole surface of a magnetic disc efficiently and improve a recording capacity by a method wherein an interval between the magnetic disc surface and the part of a slider closest to the surface is made to be close to the lower limit of a slider flying height and an interval between a magnetic film surface and the position of a reproduction device is smaller on the outer circumference side of the disc than on the inner circumference side. SOLUTION: A slider whose posture angle θ is gradually reduced from the inner circumference of a magnetic disc data region toward the outer circumference is used. A flow-out end angle is positive. The lowest flying height position of the slider is positioned on the flow-out end side of the position of a reproduction device. The curvature R of a slider surface and the slider posture angle θare so set as to satisfy a relation Rθ>L/2 regardless of the radial position of the disc. In order to reduce the slider posture angle gradually from the inner circumference toward the outer circumference, a slider which does not have a tapered construction on its flow-in end or has a minute step construction on its flow-in end is employed. The curvature R of the slider surface, the spider length L and the slider posture angle θ are so set as to have the flow-out end angle close to zero on the outermost circumference of the magnetic disc data region.

46. 发明专利

JPH10269544A MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH10269544A
公开(公告)日：1998-10-09
申请号：JP7130297
申请日：1997-03-25
申请人： HITACHI LTD
发明人： SUZUKI MASAYUKI , ARAKI SEIICHI , TOKISUE HIROMITSU
IPC分类号： G11B5/66 , G11B5/39 , G11B5/64 , G11B5/73 , G11B5/84
摘要： PROBLEM TO BE SOLVED: To reduce the thermal asperity caused by intermittent and/or continuous contact between a magnetic head and a magnetic disk by providing protrusions, which have the heights and the lengths in specific ranges with a specific density, on the surface of the disk. SOLUTION: On the surface of a magnetic disk, protrusions having lengths 0.1 to 0.4 μm and heights 5 to 50 nm are provided with the density of 1 to 10/μm . In a conventional disk, thermal.asperity is generated when a a magnetic head and disk protrusions contact to each other. However, no thermal.asperity is observed on the properly constructed disk even though the pressure of the device is reduced to 0.1 atm and the head floatation height is made less than 5 nm. Moreover, no thermal.asperity is generated even though the head contacts with the disk protrusions. By forming the protrusions, the contact temperature rise is made smaller when an MR element contacts with the protrusions on the surface of the magnetic disk. Thus, the temperature rise of the MR element is reduced and the generation of thermal.asperity is prevented.

47. 发明专利

JPH09251740A SUSPENSION FOR MAGNETIC HEAD 失效
公开(公告)号：JPH09251740A
公开(公告)日：1997-09-22
申请号：JP6058196
申请日：1996-03-18
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIHIKO , SUGAWARA SHUICHI , TAKAHASHI HARUHIDE , TOKISUE HIROMITSU
IPC分类号： G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a suspension capable of reducing fluctuation in a floating amt. of a magnetic head slider and also enhancing positioning accuracy and to realize the magnetic disk of large capacity and high reliability by imparting enough attenuation characteristic to a suspension main body without twisting it. SOLUTION: This suspension is composed of the suspension main body consisting of a base part 1a, a spring part 1b, a load arm part 1c and a gimbal part 1d, a slider 3 mounted on this gimbal part having the magnetic head, a wiring pattern formed on the suspension main body 1 and an attenuation member 6. In this case, the attenuation member 6 has the same layer structure as the wiring pattern, and is arranged with its separate attenuation parts 6 which are electrically independent of each other and approximately symmetrical to a center line of the suspension main body in the longitudinal direction.

48. 发明专利

JPH09219020A MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION 失效
公开(公告)号：JPH09219020A
公开(公告)日：1997-08-19
申请号：JP2646096
申请日：1996-02-14
申请人： HITACHI LTD
发明人： SATO YOSHIHIRO , INOUE YOICHI , TOKISUE HIROMITSU
IPC分类号： C23C14/06 , C23C14/48 , G11B5/64 , G11B5/65 , G11B5/66 , G11B5/738 , G11B5/82 , G11B5/84 , G11B5/85 , H01F10/08 , H01F41/16
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium with which a narrow spacing is embodied by omitting a protective film and into which wear resistance and sliding resistance are taken into consideration. SOLUTION: The thin films of a ground surface film 3 and a continuous magnetic film 1 are formed on a nonmagnetic substrate 4 and thereafter, a reformed layer 1a is formed on the surface layer by implanting ions to the continuous magnetic film 1 and a lubricant is applied on this surface to form a lubricant layer 2. As a result, the wear resistance and sliding resistance are assured with the continuous magnetic film 1 of the ion-implanted magnetic recording medium, for example, a magnetic disk, as the surface of the magnetic recording medium is made amorphous and harder. The need for the protective film is thus eliminated. Consequently, the narrower gap between the head and the disk is embodied and the magnetic disk having a high recording density is obtd.

49. 发明专利

JPH08249848A MAGNETIC DISK DEVICE 失效
公开(公告)号：JPH08249848A
公开(公告)日：1996-09-27
申请号：JP4999095
申请日：1995-03-09
申请人： HITACHI LTD
发明人： TAKEUCHI YOSHINORI , MASUKAWA TETSUO , HAGITANI SHINOBU , UMAGOE YUKIMORI , MAEDA NAOKI , SHIMIZU TOSHIHIKO , SUGAWARA SHUICHI , TOKISUE HIROMITSU
IPC分类号： G11B21/21
摘要： PURPOSE: To decrease the variations in the flying height of a slider and positioning errors due to mis-positioning of a head and to increase the speed and capacity of this device by forming a recessed part on the circumference of a fixing part by welding on the side of a slider spacer in contact with gimbals. CONSTITUTION: The adhesive surface side of the slider spacer 2 with the slider 1 by an adhesive 10 is provided with a recess 2a larger than the stationary region 4 and is irradiated with a laser, etc., from the bottom of this recess, by which the spacer 2 is welded to the gimbals 3. Further, the circumference of the recess 2a is provided with a concentrical ring groove 2b around the region 4 to relieve the shrinkage of the spacer 2 by thermal stress on welding and to avert the deformation on the adhesive surface side. Then, the deterioration with lapse of time and the outflow of the adhesive are decreased by welding and fixing and further, the variations in the thickness of the adhesive layer by the deformation of the adhesive surface are decreased. As a result, the flying height of the slider is lowered and the positioning accuracy is improved, by which the speed and capacity of the device are made higher.

50. 发明专利

JPH08124338A MAGNETIC HEAD SUPPORTING MECHANISM 失效
公开(公告)号：JPH08124338A
公开(公告)日：1996-05-17
申请号：JP25500394
申请日：1994-10-20
申请人： HITACHI LTD
发明人： SHIMIZU TOSHIHIKO , TOKISUE HIROMITSU , SUGAWARA SHUICHI , TAKEUCHI YOSHINORI , MAEDA NAOKI
IPC分类号： G11B5/49 , G11B5/48 , G11B21/21
摘要： PURPOSE: To reduce the variance of the floating height of gimbals or a slider due to the warp and twist, and to attain the lowered floating of the slider by fixing the slider to a slider spacer, and fixing the slider spacer and the gimbals in an independent area narrower than the area where the slider spacer and the gimbals are brought in contact. CONSTITUTION: The slider 1 mounted with a magnetic head is fixed to the slider spacer 2 by adhering, etc., and the spacer 2 and the gimbals 3 are fixed by welding or adhering in the independent fixed area 4 narrower than the area where the spacer 2 and the gimbals 3 are brought in contact. By this procedure, the variance of the floating height of the gimbals 3 or the slider 1 due to the warp and twist is reduced, and the lowered floating of the slider is attained, then a magnetic disk device with high speed and high capacity is obtained.

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