专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明专利

JPH07230400A BACKUP STRUCTURE FOR INFORMATION MANAGEMENT SYSTEM AND RESTORING METHOD USING THE STRUCTURE 失效
公开(公告)号：JPH07230400A
公开(公告)日：1995-08-29
申请号：JP2055894
申请日：1994-02-17
申请人： HITACHI LTD , HITACHI VLSI ENG
发明人： KOBAYASHI KENYA , NEGISHI AKIRA , SUZUKI TORU , ISHIKAWA AKIRA , AZUHATA SHOICHI
IPC分类号： G06F12/00 , G06F15/00
摘要： PURPOSE:To provide a restoring technique for the information management system which inexpensively restores the whole of the system with a higher reliability in the case where the time from system down to restoration is allowed to a certain degree especially in a data driven information management system. CONSTITUTION:A backup volume 8 for an information management system volume 6, a data driven processing system history information log file 9 for a queuing file 2, etc., are provided as the backup structure of the data driven information management system. If data is lost, backups of a data base 4 and the other file 5 are restored, and changed contents of files are restored based on the date of last overall backup, and the queuing file 2 is reloaded from contents of the data driven processing system history information log file in the period from the time of last daily incremental backup to the time of the occurrence of data loss, thus restoring the data.

2. 发明专利

JPH07230474A DATA BASE CONSTITUTION STRUCTURE FOR INFORMATION MANAGEMENT SYSTEM 失效
公开(公告)号：JPH07230474A
公开(公告)日：1995-08-29
申请号：JP2055794
申请日：1994-02-17
申请人： HITACHI LTD , HITACHI VLSI ENG
发明人： KOBAYASHI KENYA , NEGISHI AKIRA , SUZUKI TORU , ISHIKAWA AKIRA , AZUHATA SHOICHI
IPC分类号： G06F12/00 , G06F17/30
摘要： PURPOSE:To provide the data base constituting technique for information management system which adopts plural kinds of data bases (DB) adapted to use purposes and use aptitudes and integrates different data base management systems(DBMS) of them into one in relation to one another to develop a system where features of each DB are utilized. CONSTITUTION:This information management system is applied to data management of the semiconductor production line and is provided with an ISAMDB 1 capable of real-time processing and an RDB 2 capable of complicated retrieval processing, and a DBMS 3 of the ISAMDB 1 and a DBMS 4 of the RDB 2 are integrated into one in relation to each other and are properly used for suitable processing systems respectively. A data input terminal equipment 5 which requires specific, simple, and quick access suitable for input of work actual result data or the like is connected to the ISAMDB 1, and a data retrieval terminal equipment 6 which requires unspecific and complicated access suitable for retrieval processing of quality management or the like is connected to the RDB 2.

3. 发明专利

JPS6365630A MANUFACTURE OF SEMICONDUCTOR DEVICE 失效
公开(公告)号：JPS6365630A
公开(公告)日：1988-03-24
申请号：JP20794286
申请日：1986-09-05
申请人： HITACHI LTD , HITACHI VLSI ENG
发明人： WADA YASUO , OGA KAZUHIRO , ISHIKAWA AKIRA , OYU SHIZUNORI , KASHU NOBUYOSHI
IPC分类号： H01L21/316 , H01L21/768
摘要： PURPOSE:To improve the ion stopping power while preventing the film stress from occurring by a method wherein a coated film is filled with the most com pact fine particles. CONSTITUTION:A silicon substrate 1 is spin-coated with ethanol solution of 5 % silanol (Si(ON4)) containing 3 weight % of SiO2 fine particles in diameter of 0.1 mum at 3000 rpm to form a coated glass layer 3 containing fine particles in grooves and then the substrate 1 is annealed in a baking furnace kept at 200 deg.C for 20 minutes. At this time, inside of grooves is thickly coated with the solution in around 0.4mum while projections are thinly coated with the solution in around 0.05 mum. The film thickness ratio between upper and lower step difference depending on the depth and width etc., can be specified as around 1:10. The total film thickness of around 2 mum can be attained by coating glass film containing fine particles three times. At this time, glass films 4-6 spin- coated on the silicon substrate 1 respectively at 2000 rpm are baked at around 200 deg.C for 30 minutes to be dehydrated for condensation. Through these procedures, the gas releasing amount can be minimized even if the substrate 1 is annealed at 900 deg.C for around 20 minutes after coating process.

4. 发明专利

JP2001110028A MAGNETIC RECORDER 失效
公开(公告)号：JP2001110028A
公开(公告)日：2001-04-20
申请号：JP2000285233
申请日：2000-09-14
申请人： HITACHI LTD
发明人： OONO TSUGUYUKI , SHIROISHI YOSHIHIRO , HISHIYAMA SADAO , ISHIKAWA AKIRA , YAKU YOTSUO , YAMAMOTO TOMOO , KATO YUKIO
IPC分类号： G11B5/72 , G11B5/60 , G11B5/64 , G11B5/725 , G11B5/82 , G11B21/21
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recorder which reduces the spacing set between the magnetic head media and also lowers both floating start and end heights to satisfy its high recording density and high anti-sliding reliability. SOLUTION: This magnetic recorder has a magnetic head 1 where the mean surface roughness and the maximum surface roughness of a slider surface 2 of the head 1 are controlled at

5. 发明专利

JP2000339659A MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE 失效
公开(公告)号：JP2000339659A
公开(公告)日：2000-12-08
申请号：JP15113699
申请日：1999-05-31
申请人： HITACHI LTD
发明人： YAMAMOTO TOMOO , TAMAI ICHIRO , ISHIKAWA AKIRA , SUZUKI HIROYUKI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/667 , G11B5/738
摘要： PROBLEM TO BE SOLVED: To provide a medium having excellent resistance against thermal fluctuation and having low noise by forming a Co alloy magnetic film directly on a substrate or with a specified base film interposed, and forming an orientation controlling film containing elements selected from each two groups in a specified range. SOLUTION: An orientation controlling film containing an element selected from Cr, Ge and Si by 50 to 80 at.% and an element selected from Al, Mo, Re and W by 20 to 45 at.% is formed on a substrate. Then a magnetic film consisting of a Co alloy is formed on the orientation controlling film. Preferably, the orientation controlling film substantially has a C11b crystal structure so as to orient the axis of easy magnetization of the magnetic film in the film plane. In order to orient a Cr base film to be formed thereon in the (211) direction by using the C11b orientation controlling film, the orientation controlling film is oriented in the (116) direction.

6. 发明专利

JP2000113440A MAGNETIC RECORDING DEVICE 失效
公开(公告)号：JP2000113440A
公开(公告)日：2000-04-21
申请号：JP31959899
申请日：1999-11-10
申请人： HITACHI LTD
发明人： ISHIKAWA AKIRA , SHIROISHI YOSHIHIRO , HOSOE YUZURU , YAMAMOTO TOMOO , YAKU YOTSUO , OZAKI AKIRA , KATO YOSHIKI , FUMIOKA JIYUN
IPC分类号： G11B5/64 , G11B5/65 , G11B5/73
摘要： PROBLEM TO BE SOLVED: To provide a magnetic recording medium which is suitable for an MR head (recording/reproduction separate type head) with a high reproducing sensitivity, which is high in write bleeding, and which can obtain a high S/N ratio. SOLUTION: A magnetic film 15, 15' is provided on a substrate 1 directly or through a metallic base film 13, 13'. Then, the product Br1δ of residual magnetization Br1, which is measured in the head running direction of the magnetic film 15, 15', and the total film thickness δ is set as 5 Gμm

7. 发明专利

JPH11353601A MAGNETIC HEAD FOR SIGNAL DEFECT INSPECTION OF MAGNETIC DISK AND ITS INSPECTION METHOD 失效
公开(公告)号：JPH11353601A
公开(公告)日：1999-12-24
申请号：JP15560098
申请日：1998-06-04
申请人： HITACHI LTD
发明人： NAGANO TAKANORI , TAKAGAKI ATSUSUKE , AIDA TOMOYOSHI , ISHIKAWA AKIRA , KATO AKIRA
IPC分类号： G11B5/31 , G11B5/00 , G11B5/265 , G11B5/39
摘要： PROBLEM TO BE SOLVED: To enable the inspection of microdefects in a reproducing head formed to narrower tracks by constituting the element width of a recording head at the width above the specific width of the element width of the reproducing head. SOLUTION: The width of the recording element 01 is formed to >=1.5 times the width of the reproducing element 02. An upper magnetic film 11 is formed of CoNiFe, etc., a coil 12 of Cu, Cv, etc., a lower magnetic film 13 used in common with an upper shielding film of NiFeN, etc., an electrode 14 of Nb, Au, Nb, etc., an MR sensor film 15 of NiFe, etc., a magnetic domain control film 16 of NiO, etc., and a lower shield film 17 of NiFeN, etc. All films are formed by sputtering, etc., by which the magnetic flux sensing parts of the recording element 01 and the reproducing element 02 are formed. The width of the recording element 01 is made wider than the width of the reproducing element 02, by which the degradation in the output from the recording tracks at the time of reproduction occurring in the deviation between the position of the recording tracks and the position of the reproduction tracks is averted.

8. 发明专利

JPH10269548A MAGNETIC RECORDING MEDIUM AND MAGNETIC STORAGE DEVICE USING IT 失效
公开(公告)号：JPH10269548A
公开(公告)日：1998-10-09
申请号：JP7717497
申请日：1997-03-28
申请人： HITACHI LTD
发明人： KANBE TETSUYA , TAKAHASHI YOSHIO , ISHIKAWA AKIRA , TAMAI ICHIRO , HOSOE YUZURU , MATSUDA YOSHIFUMI , TANAHASHI KIWAMU , YAMAMOTO TOMOO
IPC分类号： G11B5/66 , G11B5/39 , G11B5/64 , G11B5/65 , H01F10/16
摘要： PROBLEM TO BE SOLVED: To provide a highly reliable magnetic storage device capable of recording/reproducing high density information. SOLUTION: This device constitutes a reproducing part of a magnetic head with a magneto-resistive effect type magnetic head, and makes a magnetic recording medium a structure having a magnetic layer formed on a substrate through a single layer or a multilayer substrate layer. Then, the magnetic layer is constituted of a columnar structural magnetic crystal particle, or an amorphous magnetic particle, and the mean particle size of this magnetic particle, and particle size variance standardized by the mean particle size are made respectively 16 nm or below, 0.5 or below, and the value Ku.v/kT dividing the product between the magnetic anisotropic constant Ku and the volume v of this magnetic particle by the product between the Boltzmann constant k and the absolute temp. T is made 60 or above, and the magnetic layer film thickness is made double or below of the mean particle size. Thus, a noise is reduced, and a high S/N and a low bit error rate are obtained, and the magnetic storage device having a mean failure interval of 300 thousand times or above at high recording density of 2 G bits per 1 inch is realized.

9. 发明专利

JPH10241141A MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING APPARATUS 失效
公开(公告)号：JPH10241141A
公开(公告)日：1998-09-11
申请号：JP4524397
申请日：1997-02-28
申请人： HITACHI LTD
发明人： YAKU YOTSUO , ISHIKAWA AKIRA , DAVID JULIANT JAYAPURAUIRA , KOJIMA SHUICHI , KATAOKA HIROYUKI , MATSUDA YOSHIFUMI , INAGAKI YUZURU , HOSOE YUZURU
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/738 , G11B5/84 , G11B21/21 , H01F10/16
摘要： PROBLEM TO BE SOLVED: To enable low level noise during reproduction, assure high S/N and small temperature change of coercive force and realize large coercive force and high reliability by forming a magnetic layer with a particular metal alloy and setting the fluctuation of magnetic viscosity in the coercive force, or residual magnetizing coercive force or in the magnetic intensity equal to the coercive force to the particular range. SOLUTION: A magnetic layer is structured by an alloy containing Co, Ni and Cr and also adding any one of Tn, Pt or by an alloy containing Co, V, Cr and also adding any one or both of Tn, Pt. The range of coercive force is set to 2000 to 5000Oe and fluctuation range of magnetic viscosity at the magnetic field intensity equal to the residual magnetizing coercive force or coercive force is also set to the range of 30 to 300Oe. Crystal particle of magnetic layer for noise reduction is set small and gain size is set equal and moreover magnetic mutual effect between crystal particles is also set small to reduce magnetizing inversion unit. Value of magnetization inversion unit can be estimated from the value of fluctuation of magnetic viscosity.

10. 发明专利

JPH08249640A MAGNETIC RECORDING MEDIUM AND MAGNETIC RECORDING DEVICE 失效
公开(公告)号：JPH08249640A
公开(公告)日：1996-09-27
申请号：JP5542095
申请日：1995-03-15
申请人： HITACHI LTD
发明人： IGARASHI KAZUSUKATSU , YAKU SHINAN , HOSOE YUZURU , KOJIMA SHUICHI , MATSUDA YOSHIFUMI , INAGAKI YUZURU , KATO AKIRA , FURUSAWA KENJI , FUTAMOTO MASAAKI , ISHIKAWA AKIRA , INABA NOBUYUKI , YAMAMOTO TOMOO
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/738
摘要： PURPOSE: To obtain a magnetic recording medium of which the medium noise is reduced and which is suitable for high-density recording, by making the required number of magnetic particles of a magnetic film be a specified value. CONSTITUTION: A magnetic film of a magnetic recording medium has a multilayered crystal structure constituted of aggregates of magnetic particles. The number of magnetic particles having a volume larger than 30nm out of these particles or the number of particles having an area larger than 10nm in the case where it is observed by any of a scanning electron microscope(SEM), an atomic force microscope(AFM) and a scanning tunneling microscope(STM) is made 1000 or above in an average for the area of a bit length × a track width. Thereby, the magnetic recording medium of which the medium noise is reduced and which is suitable for high-density recording of 1.5 gigabit or above for one square inch is obtained.

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式