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1. 发明专利

JP2003067911A Perpendicular magnetic recording medium 审中-公开
标题翻译：全能磁记录介质
公开(公告)号：JP2003067911A
公开(公告)日：2003-03-07
申请号：JP2001253129
申请日：2001-08-23
申请人： Fuji Electric Co Ltd , Nippon Hoso Kyokai , 富士電機株式会社 , 日本放送協会
发明人： SAKAI YASUSHI , OTSUKI AKIHIRO , OKUBO KEIJI , ENOMOTO KAZUO , WATANABE SADAYUKI , TAKENOIRI SHUNJI , TAMAKI TAKAHIKO , KUGA ATSUSHI , MIYASHITA HIDEKAZU , TAGUCHI AKIRA
IPC分类号： G11B5/65 , G11B5/64 , G11B5/667 , H01F10/13
摘要： PROBLEM TO BE SOLVED: To provide a perpendicular magnetic recording medium with small noises caused by the medium generated when reproducing a record and suitable for high recording density. SOLUTION: In the perpendicular magnetic recording medium comprising of at least a soft magnetic backing layer, an intermediate layer, a magnetic recording layer, a protection layer, and a liquid lubricant layer sequentially laminated on a non magnetic substrate, the above magnetic recording layer is comprised of rare-earth transition alloyed metal amorphous films, the rare- earth transition alloyed metal amorphous film has a fine column structure, boundary parts exist around these columns, the composition of the boundary parts are the vicinity of composition of compensation points of the rare-earth transition alloyed metal amorphous films, and the composition in the above columns is lower than the composition of above boundary part in terms of the density of rare-earth elements and higher than the composition of above boundary parts in terms of the density of the transition metal elements, in performing perpendicular magnetic recording, the magnetization is fixed as the above boundary part is a compensation point composition, and the above boundary part function as a magnetic wall fixing part of a recording signal.
摘要翻译：要解决的问题：提供一种垂直磁记录介质，其在再现记录时产生的适合于高记录密度的介质产生小的噪声。解决方案：在至少包括柔性磁背衬层，中间层，磁记录层，保护层和顺序层压在非磁性基板上的液体润滑剂层的垂直磁记录介质中，上述磁记录层是由稀土跃迁合金金属非晶膜组成，稀土跃迁合金金属非晶膜具有精细的柱结构，边界部分存在于这些柱周围，边界部分的组成是稀有元素的补偿点的组成附近 - 地层过渡合金化金属非晶膜，并且上述列中的组成低于上述边界部分的组成，就稀土元素的密度而言，高于上述边界部分的组成过渡金属元素在进行垂直磁记录时，磁化固定为上述边界部分是补偿点组成，并且上述边界部分用作记录信号的磁壁固定部分。

2. 发明专利

JP2003067908A Perpendicular magnetic recording medium and its manufacturing method 审中-公开
标题翻译：全能磁记录介质及其制造方法
公开(公告)号：JP2003067908A
公开(公告)日：2003-03-07
申请号：JP2001253128
申请日：2001-08-23
申请人： Fuji Electric Co Ltd , Nippon Hoso Kyokai , 富士電機株式会社 , 日本放送協会
发明人： SAKAI YASUSHI , OTSUKI AKIHIRO , OKUBO KEIJI , ENOMOTO KAZUO , WATANABE SADAYUKI , TAMAKI TAKAHIKO , KUGA ATSUSHI , MIYASHITA HIDEKAZU , TAGUCHI AKIRA
IPC分类号： C23C14/14 , C23C14/34 , G11B5/64 , G11B5/667 , G11B5/73 , G11B5/851 , H01F10/13 , H01F41/18
CPC分类号： G11B5/667 , G11B5/7325 , G11B5/851
摘要： PROBLEM TO BE SOLVED: To provide a method to easily obtain a perpendicular magnetic recording medium having a targeted magnetic characteristics by a spattering method and obtained magnetic recording medium.
SOLUTION: The perpendicular magnetic recording medium in this invention is made up by laminating at least a soft magnetic backing layer, a foundation layer, a magnetic recording layer, a protection layer, and a liquid lubricant layer sequentially on a non-magnetic substrate. The above magnetic recording layer is a rare metal-transition alloyed metal amorphous film formed by the spattering method, and the formation of the above magnetic recording layer by the spattering method is characterized to be performed by the film forming gas added with 2%≤H
2 gas ≤60%. This invention discloses the manufacturing method of the perpendicular magnetic recording medium.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：提供一种通过溅射方法和获得的磁记录介质容易地获得具有目标磁特性的垂直磁记录介质的方法。解决方案：本发明的垂直磁记录介质是通过在非磁性衬底上依次层叠至少软磁背衬层，基础层，磁记录层，保护层和液体润滑剂层而构成的。上述磁记录层是通过溅射法形成的稀有金属 - 过渡合金化金属非晶膜，通过溅射法形成上述磁记录层的特征在于，通过添加2％<= H2气<= 60％。本发明公开了垂直磁记录介质的制造方法。

3. 发明专利

JPH09147357A PRODUCTION OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPH09147357A
公开(公告)日：1997-06-06
申请号：JP30553495
申请日：1995-11-24
申请人： FUJI ELECTRIC CO LTD
发明人： ATAKA TOYOJI , OKUBO KEIJI
IPC分类号： G11B5/66 , G11B5/64 , G11B5/73 , G11B5/738 , G11B5/85 , G11B5/851 , H01F41/18
摘要： PROBLEM TO BE SOLVED: To increase coercive force, squareness ratio and line recording density and to improve electromagnetic transducing characteristics by forming magnetic layers in separate atmospheres of prescribed gases. SOLUTION: An NiP film as a nonmagnetic layer 2 is formed on a nonmagnetic substrate having prescribed parallelism, planeness and surface roughness to obtain a nonmagnetic substrate 11. A carrier carrying the substrate 11 is transferred along three kinds of arranged targets for film formation in a vacuum chamber and thin films are formed on the substrate 11. At this time, Ar is introduced into the chamber and a nonmagnetic metallic underlayer 3 of Cr and a hard magnetic layer 41 are formed. A gaseous mixture of Ar with x% N2 is then introduced and a hard magnetic layer 42 is formed. A DLC film 5 as a protective layer is further formed by introducing a gaseous Ar-CH3 mixture.

4. 发明专利

JPH08212532A MAGNETIC RECORDING MEDIUM AND PRODUCTION THEREOF 失效
公开(公告)号：JPH08212532A
公开(公告)日：1996-08-20
申请号：JP2324895
申请日：1995-02-13
申请人： FUJI ELECTRIC CO LTD
发明人： OKUBO KEIJI , MINASAWA HIROSHI , YAMAGISHI MINORU
IPC分类号： G11B5/66 , G11B5/64 , G11B5/65 , G11B5/673 , G11B5/716 , G11B5/738
摘要： PURPOSE: To obtain a magnetic recording medium having high coercive force Hc of 2,000-2,800Oe and comparable or superior to low noise CoCrTa in low noise characteristics with a high coercive force material (CoCrPt or CoNiCrTa). CONSTITUTION: An Ni-P plating layer 2 is formed on an Al-Mg alloy substrate 1 and a Cr underlayer 3, a multilayered film type magnetic layer 7 and a protective layer 5 are successively formed on the plating layer 2 by sputtering. The protective layer 5 is then coated with a lubricative layer 6 to obtain the objective magnetic recording medium. The magnetic layer 7 consists of 2-6 magnetic films 7a laminated while interposing nonmagnetic middle layers 7b between them, and CoCrPt or CoNiCrTa as a high coercive force material is used as the material of the magnetic films 7a. Since the magnetic films 7a are separated from each other by the middle layers 7b, magnetic interaction between the magnetic films in the perpendicular direction is reduced and medium noise can be reduced while ensuring high coercive force.

5. 发明专利

JPH07129925A PRODUCTION OF THIN-FILM MAGNETIC HEAD 失效
公开(公告)号：JPH07129925A
公开(公告)日：1995-05-19
申请号：JP27472093
申请日：1993-11-04
申请人： FUJI ELECTRIC CO LTD
发明人： ATAKA TOYOMICHI , OKUBO KEIJI , KANAMORI MASASHI
IPC分类号： G11B5/31
摘要： PURPOSE:To provide a process for production of the thin-film magnetic head capable of enhancing the bondability between bonding pad parts and lead wires of the thin-film de magnetic head and preventing the peeling, etc., of the lead wires. CONSTITUTION:Org. protective films 40 are formed on electrode pad parts 8, 15 in the final stage of a wafer process after the formation of the bonding pad parts 8 for a magneto-resistance effect element and the bonding pad parts 15 for a magnetic induction element. A bonding stage is conducted after water cutting and guiding stages and since the surfaces of the electrode pad parts 8, 15 are coated with the org. protective films 40, the surfaces of the pad parts 8, 15 are kept free from contamination during a machining stage. The org. protective films 40 are removed by an org. solvent just prior to the bonding stage and thereafter, the lead wires are bonded to these clean surfaces. Since the pad surfaces are not deposited with dirt, etc., the bondability of the lead wires is good and the generation of the defects, such as peeling of the lead wires, is obviated.

6. 发明专利

JPH05109022A THIN-FILM MAGNETIC HEAD AND ITS MANUFACTURE 失效
公开(公告)号：JPH05109022A
公开(公告)日：1993-04-30
申请号：JP27125791
申请日：1991-10-18
申请人： FUJI ELECTRIC CO LTD
发明人： OKUBO KEIJI , ARIMOTO YUKO , UWAZUMI HIROYUKI , YAMAZAKI HISASHI
IPC分类号： G11B5/31 , H01F1/153
摘要： PURPOSE:To realize a thin-film magnetic head wherein its high permeability can be obtained even by means of a practical heating treatment apparatus and to realize its manufacturing method by a method wherein the application condition of an external magnetic field in an anisotropic magnetic-field relaxation treatment is optimized. CONSTITUTION:A lower-part magnetic core 3 and an upper-part magnetic core 8 which are formed on the surface side of a substrate 2 for a thin-film magnetic head 1 are composed of a Co-based amorphous alloy to which an anisotropic magnetic-field relaxation treatment has been executed; their saturation magnetic flux density and their permeability are high. In their manufacturing process, the lower-part and upper-part magnetic cores 3, 8 are heated in their heat treatment process, and a rotating magnetic field at 0.01kOe or higher is applied from the outside even in their cooling process.

7. 发明专利

JPH03231890A OPTICAL DATA RECORDING MEDIUM AND PREPARATION THEREOF 失效
公开(公告)号：JPH03231890A
公开(公告)日：1991-10-15
申请号：JP26554890
申请日：1990-10-03
申请人： FUJI ELECTRIC CO LTD
发明人： OKUBO KEIJI , KAWASAKI HISASHI
IPC分类号： B41M5/26 , C23C18/08 , G11B7/24 , G11B7/243
摘要： PURPOSE:To improve the repeating durability of recording and erasure by forming an optical data recording medium by spraying a solution containing In, Cu and Se to a substrate set to predetermined temp. to provided recording layer. CONSTITUTION:A solution containing In, Cu and Se is applied to a substrate by spin coating and baked at predetermined temp. to form a recording layer composed of an InCuSe2 alloy on a substrate to obtain an optical data recording medium. Since the composition of InCuSe2 wherein Cu is added to InSe is used as the recording layer, the repeating durability of the optical data recording medium is enhanced. As a preferable embodiment of the optical data recording medium, the first protective layer 2, a recording layer 3, the second protective layer 4, a reflecting cooling layer 5 and a surface protective layer 6 are succes sively laminated to a substrate 1.

8. 发明专利

JPH02247847A MAGNETO-OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH02247847A
公开(公告)日：1990-10-03
申请号：JP6958389
申请日：1989-03-22
申请人： FUJI ELECTRIC CO LTD
发明人： IWAMURO NORIYUKI , OKUBO KEIJI , UMEMOTO HIDETOSHI
IPC分类号： G11B11/10 , G11B11/105
摘要： PURPOSE:To improve reproduction characteristics and corrosion resistance of the medium by forming a dielectric layer of silicon monoxide and incorporating a rare earth element into this layer. CONSTITUTION:The dielectric layer 2 is formed between a substrate 1 and a magnetic thin film 3. The dielectric layer 2 comprises a silicon monoxide SiO film containing one of rare earth elements. The SiO film has low permeability of water vapor and causes little crack so that it prevents corrosion of the magnetic thin film 3. By adding a proper amt. of rare earth element, reproduction CN can be properly maintained and the laser power required for recording and easing can be reduced. The obtd. medium has large CN in reproduction and is excellent in recording sensitivity and erasing characteristics. When the rotation speed is increased, the disk can be used for recording/erasing with semiconductor laser light.

9. 发明专利

JPH02223033A OPTICAL RECORDING MEDIUM 失效
公开(公告)号：JPH02223033A
公开(公告)日：1990-09-05
申请号：JP8905389
申请日：1989-04-07
申请人： FUJI ELECTRIC CO LTD
发明人： ISHIBASHI SHINICHI , OKUBO KEIJI
IPC分类号： G11B7/24 , G11B7/254 , G11B7/257
摘要： PURPOSE:To obtain excellent photosensitivity and reliability by using specific ceramics having proper values of heat resistance, coefft. of thermal diffusion and refractive index as a protective layer. CONSTITUTION:On the substrate 21, a first protective layer 22, medium layer 23, second protective layer 24 and a surface protective layer 25 are formed. The first and second protective layers 22, 24 are composed of such ceramics having a composition of (SiOx)1-y(Z)y, wherein Z is one of Cu, Al, Ti, Pt, Cr, Fe, Nd, Sm and Dy. By this constitution, the refractive indices and coeffts. of thermal diffusion of the protective layers 22, 24 become proper to increase the light absorptivity of the medium layer 23 in the optical recording medium. The energy of light can be effectively used for heating the medium layer 23 and the thermal diffusion of energy can be prevented. Thus, recording/erasing of informations can be performed with smaller laser power, while the reliability of the medium is improved.

10. 发明专利

JPH02192025A STILL PICTURE REPRODUCING DEVICE USING OPTICAL MEMORY CARD 失效
公开(公告)号：JPH02192025A
公开(公告)日：1990-07-27
申请号：JP1080389
申请日：1989-01-19
申请人： FUJI ELECTRIC CO LTD
发明人： UENO MASAKAZU , OKUBO KEIJI
IPC分类号： H04N5/84 , G11B7/00 , G11B7/0033 , G11B7/24
摘要： PURPOSE:To reproduce/display a still picture, to decrease a setting space, and to improve the convenience of the handling and custody of a recording medium by utilizing an optical memory card as the recording medium. CONSTITUTION:A picture information reproducing means 2, which provides an optical head to optically read picture information from an optical memory card 1 to have recorded the still picture information, and a picture display means 4 which displays the still picture are possessed, and the picture information reproducing means 2 has a sending mechanism to relatively scan a straight line track for the optical memory card loaded with the optical head. That is, the optical head relatively scans a straight line track 1a of the optical memory card 1 by the operation of the sending mechanism, and by the track scanning, the still picture from the optical memory card 1 is reproduced. Thus the still picture from the optical memory card can be reproduced, the still picture can be easily selected, a device constitution is made compact, and the convenience, etc., of the handling/custody of the recording medium can be exerted.

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