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1. 发明专利

JP2004303318A Magnetic disk device 审中-公开
公开(公告)号：JP2004303318A
公开(公告)日：2004-10-28
申请号：JP2003093902
申请日：2003-03-31
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： SHIMIZU HIROKI , JO KINKOKU , TANAKA HIDEAKI
IPC分类号： G11B5/82 , G11B5/84 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To highly accurately measure a head slider floating amount in a magnetic disk device.
SOLUTION: The magnetic disk device is provided with a magnetic disk 3 having a servo area for recording servo data and a data area for recording user data, a magnetic head slider 1 for recording/reproducing the information of the magnetic disk 3, and a floating amount calculation circuit for calculating a magnetic head slider floating amount based on the information of the magnetic disk 3. The magnetic disk 3 has a calibration track group 4 in which a plurality of floating amount measuring tracks recording floating amount measuring data 5 are adjacently disposed at an interval in a diameter direction to be seen very small compared with a magnetic head slider width. The floating amount calculation circuit calculates the floating amount of the magnetic head slider 1 based on the floating amount measuring data 5 recorded in the plurality of floating amount measuring tracks of the calibration track group 4.
COPYRIGHT: (C)2005,JPO&NCIPI

2. 发明专利

JP2014144860A Plate-like member and production method of the same, transport machine and production method of the same, and escalator 审中-公开
标题翻译：类似板材的成员及其生产方法，运输机器及其生产方法及其自动化
公开(公告)号：JP2014144860A
公开(公告)日：2014-08-14
申请号：JP2013014989
申请日：2013-01-30
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TATEMURA MAKOTO , MOGI TOSHIYUKI , SATO KAZUNARI , TANAKA HIDEAKI
IPC分类号： B66B23/22 , B21D39/03 , B66B23/24
摘要： PROBLEM TO BE SOLVED: To solve the problems that, when a drilling part and a plastic fastening part are provided on a plate-like member, distance accuracy between a center of the plastic fastening part and a center of the drilling part is not sufficient.SOLUTION: When a drilling part and a plastic fastening part are provided on two plate-like members, a punch and a die are provided on the drilling part and the plastic fastening part, respectively. The punch for the drilling part starts drilling at first before the punch for the plastic fastening part. While the punch for the drilling part is entered in a workpiece, plastic fastening is completed.
摘要翻译：要解决的问题：为了解决当在板状构件上设置钻孔部分和塑料紧固部件时，塑料紧固部件的中心与钻孔部件的中心之间的距离精度不足。解决方案：当在两个板状构件上设置钻孔部分和塑料紧固部件时，分别在钻孔部分和塑料紧固部分上设置冲头和模具。在冲压前，钻头的冲头首先开始钻孔，以便塑料紧固件的冲头。当钻孔部件的冲头进入工件时，塑料紧固就完成了。

3. 发明专利

JP2003011054A Polishing method for magnetic head and device thereof 审中-公开
标题翻译：磁头抛光方法及其装置
公开(公告)号：JP2003011054A
公开(公告)日：2003-01-15
申请号：JP2001198264
申请日：2001-06-29
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANAKA HIDEAKI , TAKAHASHI TOSHIO
IPC分类号： B24B19/26 , B24B37/00 , G11B5/187 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a polishing method for a magnetic head and a device thereof capable of polishing a levitation face of the magnetic head by combining a free abrasive grain polishing method and a fixed abrasive grain polishing method together. SOLUTION: This polishing method comprises a first process A in which a resistance value of detection pattern from a workpiece is measured, MR height distribution of the workpiece is calculated from the measured values, a polishing amount of the workpiece is calculated based on deviation of the measured values and a target value, the workpiece is bent by giving the inclination and bending, and polishing is formed by free abrasive grains until MR height of the workpiece reaches a predetermined value and a second process B in which finish polishing of the workpiece is performed by fixed abrasive grains up to final target MR height by moving at a pressurizing point where bending is given to the workpiece. Unevenness of MR height distribution of the workpiece is reduced, and MR height of the workpiece is realized with high precision. The workpiece is finish-polished by fixed abrasive grains embedded uniformly at high density to reduce unevenness among lots of roughness of a machining face of the workpiece and a recess amount.
摘要翻译：要解决的问题：提供一种通过将自由磨粒抛光方法和固定的磨粒抛光方法结合在一起而能够对磁头的悬浮面进行抛光的磁头及其装置的抛光方法。解决方案：该抛光方法包括其中测量来自工件的检测图案的电阻值的第一处理A，根据测量值计算工件的MR高度分布，基于工件的偏差来计算工件的抛光量测量值和目标值，通过给出倾斜和弯曲来弯曲工件，并且通过自由磨粒形成抛光，直到工件的MR高度达到预定值，并且执行工件的精加工的第二工艺B 通过在向工件施加弯曲的加压点处移动，通过固定的磨料颗粒直到最终目标MR高度。工件的MR高度分布不均匀性降低，工件的高度高精度地实现。用高密度均匀地嵌入的固定磨粒精加工工件，以减少工件加工面粗糙度和凹陷量之间的不均匀性。

4. 发明专利

JP2003331409A Magnetic head slider and its manufacturing method 审中-公开
标题翻译：磁头滑块及其制造方法
公开(公告)号：JP2003331409A
公开(公告)日：2003-11-21
申请号：JP2002375859
申请日：2002-12-26
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANAKA HIDEAKI , FURUSAWA KENJI , SEKI TAKATERU , TAKAKURA AKIO , ISONO CHIHIRO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide the highly reliable floating surface shape of a magnetic head slider capable of dealing with low floating. SOLUTION: When the floating surface of the magnetic head slider is brought into contact with a lap surface to be lapped, lapping is performed in the state of increased rigidity applied therebetween and, by controlling standard deviation between the flatness of the lapped floating surface and the recessed amount of the floating surface and a magnetic element part, the magnetic head slider capable of low float driving is efficiently produced. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供能够处理低浮动的磁头滑块的高度可靠的浮动表面形状。
解决方案：当磁头滑块的浮动表面与要研磨的搭接表面接触时，在其间施加的刚性增加的状态下进行研磨，并且通过控制重叠浮动的平坦度之间的标准偏差表面和浮动表面的凹陷量以及磁性元件部分，能够有效地制造能够进行低浮动驱动的磁头滑块。版权所有（C）2004，JPO

5. 发明专利

JP2003317213A Magnetoresistive effect head and method for manufacturing the same 审中-公开
标题翻译：磁阻效应头及其制造方法
公开(公告)号：JP2003317213A
公开(公告)日：2003-11-07
申请号：JP2002115882
申请日：2002-04-18
申请人： Hitachi Ltd , 株式会社日立製作所
发明人： TANAKA HIDEAKI , TAMURA TOSHIO , FURUSAWA KENJI
IPC分类号： G11B5/39
摘要： PROBLEM TO BE SOLVED: To provide a structure for a magnetoresistive effect head for manufacturing ferromagnetic tunnel junction elements or magnetoresistive elements to be used in a CPP mode by mechanical polishing alone while assuring working quality and working accuracy and a method for manufacturing the same. SOLUTION: The magnetoresistive effect head which is formed with laminated films interposed with an insulating layer 144 between a first magnetic layer 145 and a second magnetic layer 143 as a major part of the magnetoresistive element and consists of a system to pass a sense current in the film thickness direction of these laminated films comprises forming shielding layers 11 and 16 disposed on the outer side of the laminated films by amorphous metallic layers configurating preventive layers for suppressing the plastic flow of the magnetic layers during mechanical polishing. The electrode layers may be formed of the amorphous metallic layers in place of the shielding layers. The preventive layers for suppressing the plastic flow of the magnetic layers 145 and 143 are recommended to be formed to the spacing therebetween of a range within 40 nm in order to suppress the plastic flow of the magnetic layers. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：提供一种用于制造用于CPP模式的铁磁隧道结元件或磁阻元件的磁阻效应头的结构，其中通过机械抛光单独确保工作质量和加工精度，以及制造方法相同。解决方案：磁阻效应头由层叠膜形成，其中介于第一磁性层145和第二磁性层143之间的绝缘层144作为磁阻元件的主要部分，并且由传感器这些层叠膜的膜厚方向的电流包括通过非结构金属层形成设置在层叠膜的外侧的屏蔽层11和16，该非晶金属层构成用于抑制机械抛光期间磁性层的塑性流动的防止层。电极层可以由非晶金属层代替屏蔽层形成。为了抑制磁性层的塑性流动，推荐抑制磁性层145和143的塑性流动的防止层的间隔在40nm以内。版权所有（C）2004，JPO

6. 发明专利

JP2004005911A SUSPENSION AND HEAD ASSEMBLY 审中-公开
公开(公告)号：JP2004005911A
公开(公告)日：2004-01-08
申请号：JP2003015522
申请日：2003-01-24
申请人： HITACHI LTD
发明人： TAKAHASHI HARUHIDE , NAKAMURA SHIGEO , TANAKA HIDEAKI
IPC分类号： G11B21/21 , G11B5/48 , G11B5/58 , G11B21/16
摘要： PROBLEM TO BE SOLVED: To provide a head assembly which reconciles increase of a pressing load, for improving the impact resistance in the operation of an apparatus with atmospheric pressure dependence on floating quantity, since the atmospheric pressure dependence worsens with the increase in the pressing load. SOLUTION: A first slider 4 provided with a head for recording and reproducing information is provided on the tip side of a suspension and and a second slider 14, which records and reproduces no information, is provided on the side of an arm 1 of the suspension. A large pressing load is applied to the second slider 14 for improving the impact resistance not only of the second slider 14, but also of the whole suspension, and the load to be applied to the first head slider 4 is reduced to be smaller than that to the second slider 14 for suppressing the variance of the floating quantity due to the atmospheric pressure dependence. COPYRIGHT: (C)2004,JPO

7. 发明专利

JP2002230930A MAGNETIC DISK 失效
公开(公告)号：JP2002230930A
公开(公告)日：2002-08-16
申请号：JP2001019389
申请日：2001-01-29
申请人： HITACHI LTD
发明人： KURITA MASAYUKI , MATSUMOTO MASAAKI , TANAKA HIDEAKI , MIYAKE YOSHIHIKO
IPC分类号： G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic disk which attains a high density recording with a slider structure capable of stably holding the minimum floatation amount. SOLUTION: An air bearing surface is formed and an element pad mounting a recording and reproducing element is arranged independently of a floatation pad which generates air pressure being balanced with a load. The area of the element pad is set to be between 0.001 mm2 and 0.01 mm2 in order to suppress pressure being newly generated when the element pad approaches a disk surface to be within a range not to influence to the floatation amount.

8. 发明专利

JP2002163076A INFORMATION STORAGE DEVICE WITH IMPROVED RELIABILITY TO CONTINUOUS OPERATION AND STORAGE CONTROLLING METHOD 审中-公开
公开(公告)号：JP2002163076A
公开(公告)日：2002-06-07
申请号：JP2001230769
申请日：2001-07-31
申请人： HITACHI LTD
发明人： TANAKA HIDEAKI
IPC分类号： G06F1/32 , G06F3/06 , G06F12/16 , G11B19/00 , G11B20/10 , H04N5/765 , H04N5/781 , H04N5/85
摘要： PROBLEM TO BE SOLVED: To greatly improve reliability during continuous operation in an information storage device having functions of always continuously storing inputted information and using necessary information only. SOLUTION: By means of this information storage device having a plurality of groups of storage devices, the inputted information is controlled to be sequentially stored in temporary storage areas distributed in the groups of storage devices, and other groups excepting the group of storage devices selected as a current storage object are set in a stopped state. In this way, a working time of a single group of storage devices can be reduced, and reliability of the information storage device in a continuous operation time can be secured.

9. 发明专利

JP2001250315A HIGHLY RELIABLE STORAGE DEVICE AND INFORMATION RECORDING METHOD 失效
公开(公告)号：JP2001250315A
公开(公告)日：2001-09-14
申请号：JP2000063291
申请日：2000-03-03
申请人： HITACHI LTD
发明人： TANAKA HIDEAKI , YAMASHITA TADAHARU
IPC分类号： G06F3/06 , G06F12/08 , G11B19/00 , G11B19/04 , G11B20/10 , G11B19/02
摘要： PROBLEM TO BE SOLVED: To reduce the time during which a magnetic head stays on a magnetic disk and to reduce the number of loading and unloading. SOLUTION: A nonvolatile memory 5 is mounted to temporarily store information under a recording instruction from a host 11. A number of information is accumulated in the memory 5 and the information is collectively recorded later on a magnetic disk 1. Thus, the number of accesses made to the disk 1 of a magnetic head 2 is reduced, the time during which the head 1 stays on the disk 2 is reduced and the number of loading and unloading is also reduced.

10. 发明专利

JP2001229514A THIN FILM MAGNETIC HEAD AND ITS MANUFACTURING METHOD 失效
公开(公告)号：JP2001229514A
公开(公告)日：2001-08-24
申请号：JP2000039740
申请日：2000-02-14
申请人： HITACHI LTD
发明人： CHIBA HIROSHI , OCHIAI YUJI , TANAKA HIDEAKI , SASAKI SHINJI , FURUSAWA KENJI
IPC分类号： G11B5/39 , G11B5/60 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To greatly improve magnetic and floating characteristics of a thin film magnetic head and to enhance reliability there of in the manufacturing method of thhe head using a giant magneto-resistance(GMR) head or a spin- tunnel magneto-resistance(TMR) head for reproducing. SOLUTION: In the method for machining the floating surface of a thin film magnetic head, a stepped rail is machined in the floating surface by ion milling, and then clustered ion beam machining is performed. Alternatively, the clustered ion beam machining is performed while the magnetic head is attached to a support spring, and assembling to a drive is subsequently performed in a vacuum or atmosphere controlled chamber. Thereby, surface toughness and machining level difference are reduced, and the deterioration of element characteristics caused by damage, corrosion or contamination is prevented. Further, variance in floating amounts is reduced to realize a reduction in the effective floating amount of the head, a magnetic disk device having a recording density higher than that in the conventional case is provided, and the reliability of the magnetic disk device is greatly enhanced.

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