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1. 发明专利

JPS6116046A Formation of protective film for recording medium 失效
标题翻译：形成用于记录介质的保护膜
公开(公告)号：JPS6116046A
公开(公告)日：1986-01-24
申请号：JP13655684
申请日：1984-07-03
申请人： Fujitsu Ltd
发明人： SHIBATA ITARU , MORIBE MINEO , HAMADA MITSURU , HIRANO HIROSHI , MAEDA MIYOZOU
IPC分类号： G11B7/26 , G11B7/24 , G11B7/257
CPC分类号： G11B7/2578 , G11B7/2531 , G11B7/2533 , G11B2007/24316 , G11B2007/25706 , G11B2007/2571 , G11B2007/25715
摘要： PURPOSE:To improve the adhesiveness between a protective film and optical disk recording layer and to extend the life of a recording medium for an optical disk by providing a mixed layer composed of a material constituting the recording layer and a material constituting the protective layer on the surface of the recording layer and forming the protective film while oxidizing thermally the mixed layer. CONSTITUTION:The recording layer 2 consisting of Te or Te alloy, etc. is formed by vacuum deposition to a prescribed film thickness on a substrate 1 which is a glass disk, PMMA disk, etc. The vapor deposition of Si to be formed as the protective film is started from the end period of the formation of such recording layer to form the mixed layer 3 composed of the recording layer consisting of Te and Si on the surface of the recording layer 2. The mixed layer is thereafter thermally oxidized, by which the oxide layer consisting of TeO, TeO2 and SiO, SiO2, etc. is formed on the surface of the layer 2. An SiO2 layer 4 is further formed by an electron beam onto the oxide layer, by which the adhesiveness between the layer 2 and the protective layer (the mixed layer 3 + the SiO2 layer 4) is improved and the internal stress of the protective film is decreased.
摘要翻译：目的：为了提高保护膜和光盘记录层之间的粘附性，并且通过在构成记录层的材料和构成保护层的材料上构成混合层，延长光盘记录介质的使用寿命并且在混合层热的同时氧化形成保护膜。构成：由Te或Te合金等构成的记录层2通过在作为玻璃盘，PMMA盘等的基板1上，以规定的膜厚度进行真空蒸镀而形成。作为从形成这种记录层的结束期开始保护膜，以在记录层2的表面上形成由Te和Si组成的记录层组成的混合层3.然后将混合层热氧化，由此，在层2的表面上形成由TeO，TeO 2和SiO，SiO 2等构成的氧化物层。通过电子束进一步在氧化物层上形成SiO 2层4，通过该SiO2层4，层2和保护层（混合层3 + SiO2层4）得到改善，保护膜的内应力降低。

2. 发明专利

JPS60138734A PRODUCTION OF MAGNETIC DISC 失效
公开(公告)号：JPS60138734A
公开(公告)日：1985-07-23
申请号：JP24931983
申请日：1983-12-27
申请人： FUJITSU LTD
发明人： TAKAHASHI JIYUN , MAEDA MIYOZOU , FUKUSHIMA SHIGERU , SUENAGA TADATOSHI , NARUMI TOSHIKATSU
IPC分类号： G11B5/845
摘要： PURPOSE:To achieve high recording density by placing a disc-shaped magnet under a disc and impressing a uniform vertical magnetic field over the entire surface in the stage of coating a paint on the disc thereby manufacturing a vertical recording medium. CONSTITUTION:A magnet 2 for vertical orientation having approximately the same shape as the shape of a disc 1 is placed under said disc and a vertical recording medium is formed thereon by spin coating. High recording density is thus achieved.

3. 发明专利

JPS59154636A Magnetic recording medium 失效
标题翻译：磁记录介质
公开(公告)号：JPS59154636A
公开(公告)日：1984-09-03
申请号：JP2875983
申请日：1983-02-23
申请人： Fujitsu Ltd
发明人： FUKUSHIMA SHIGERU , MAEDA MIYOZOU , SUENAGA TADATOSHI , TAKAHASHI JIYUN , ISHIDA SHIYOUJI
IPC分类号： G11B5/708 , C09D5/23 , C09D7/12 , G11B5/706
CPC分类号： G11B5/70636
摘要： PURPOSE:To obtain a magnetic recording medium generating little noise and having superior mechanical strength by reducing chromium oxide (CrO2) and adding the resulting dichromium trioxide (Cr2O3) having an org. film on the surface as a reinforcing agent for a medium. CONSTITUTION:Needlelike powder of CrO2 having about 0.5mum uniform grain size is reduced to obtain nonmagnetic Cr2O3 with high hardness usable as a reinforcing agent for the coated film of a magnetic recording medium. The reduction of CrO2 as a magnetic material and the surface modification to improve the dispersibility are simultaneously attained by carrying out heat treatment in an atmosphere contg. an org. solvent. For example, a reaction (a) in a gaseous nitrogen atmosphere contg. ethanol proceeds more rapidly than a reaction (b) in a gaseous nitrogen atmosphere because CrO2 acts as an oxidizing agent for the org. solvent. Cr2O3 obtd. at a relatively low temp. such as 250-300 deg.C is needlelike powder with high hardness and a fine shape, and the powder has high dispersibility in a magnetic coating material (magnetic medium) and can reduce noise from the medium. The preferred amount of Cr2O3 added as a reinforcing agent is 3-20%, especially 5-13%.
摘要翻译：目的：获得通过还原氧化铬（CrO 2）产生噪音小且机械强度优异的磁记录介质，并加入所得到的具有组分的三氧化二铬（Cr 2 O 3）。作为介质的增强剂的表面上的膜。构成：减少具有约0.5μm均匀晶粒尺寸的CrO 2的针状粉末，以获得具有高硬度的非磁性Cr 2 O 3，可用作磁记录介质的涂膜的增强剂。作为磁性材料的CrO 2的还原和通过在气氛中进行热处理同时获得提高分散性的表面改性。一个组织溶剂。例如，气态氮气中的反应（a）乙醇在气态氮气氛中比反应（b）更快地进行，因为CrO 2作为组织的氧化剂。溶剂。 Cr2O3有限公司在相对较低的温度例如250-300℃是具有高硬度和细小形状的针状粉末，并且粉末在磁性涂层材料（磁性介质）中具有高分散性，并且可以降低介质的噪音。作为增强剂添加的Cr 2 O 3的优选量为3-20％，特别优选为5〜13％。

4. 发明专利

JPS5975434A Magnetic disc 失效
标题翻译：磁盘
公开(公告)号：JPS5975434A
公开(公告)日：1984-04-28
申请号：JP18553382
申请日：1982-10-22
申请人： Fujitsu Ltd
发明人： SUENAGA TADATOSHI , OGAWA KOUICHI , MAEDA MIYOZOU , FUKUSHIMA SHIGERU , NARUMI TOSHIKATSU
IPC分类号： G11B5/73 , G11B5/82
CPC分类号： G11B5/825
摘要： PURPOSE:To obtain a disc which prevents the head crush owing to a collision between a flexible recording medium and a floating type head even if the disc is rotated at a high speed by providing an annular projecting part on a hard substrate, fixing a flexible recording medium on the annular projecting part and providing a gap between the medium and the substrate. CONSTITUTION:An annular projecting part 2'-2' is provided on one or both surfaces of a hard substrate 2 of Al, resin or the like, and a flexible disc medium 1 is fixed to the surfaces A, B of the part 2'-2'. If a space 3 is provided in the above-mentioned way, the crush of a floating head 4 is prevented on account of a buffer effect in the space 3 even if the head collides against the medium 1 during rotation at a high speed. Even if foreign matter 5 intrudes on the surface of the medium 1, the gap recesses and the crush of the head is prevented. This high speed rotation of a floppy disc is thus made possible whereby the capacity is made large by increasing the frequency for writing.
摘要翻译：目的：为了获得一种盘，即使在柔性记录介质和浮动型头之间发生冲突，即使通过在硬质基板上设置环形突出部分而使盘高速旋转也能防止头部挤压，固定柔性记录介质在环形突出部分上并且在介质和基板之间提供间隙。构成：在Al，树脂等的硬质基板2的一个或两个表面上设置环状突出部2'-2'，并且将软盘介质1固定在部分2'的表面A，B上， -2' 。如果以上述方式设置空间3，则即使在高速旋转期间头部与介质1碰撞时，由于空间3中的缓冲效果，因此防止浮动头4的挤压。即使异物5侵入到介质1的表面上，也能防止间隙凹陷和头部的挤压。因此，使得软盘的高速旋转成为可能，由此通过增加写入频率使得容量变大。

5. 发明专利

JPS57147134A MANUFACTURE FOR MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS57147134A
公开(公告)日：1982-09-10
申请号：JP3056981
申请日：1981-03-05
申请人： FUJITSU LTD
发明人： ISHIDA SHIYOUJI , HAMADA MITSURU , MAEDA MIYOZOU
IPC分类号： G11B5/842
摘要： PURPOSE:To remove insoluble substance surely and to reduce a mixing time, by eliminating insoluble substance such as aggregated lump of magnetic powder and cracks of kneading balls with centrifugal separation from a paint obtained from kneading, after kneading the magnetic powder and a solution of coupling agent. CONSTITUTION:The solution of coupling agent consisting of magnetic powder such as gamma-Fe2O3 powder of about 0.5mum in particle diameter where aggregated lumps of >=10mum, coupling agent and solvent is kneaded by using aluminum balls, or polyethylene coated aluminum balls, and foregin materials such as aggregated lumps and ball cracked tips are removed by using a sharpless centrifugal separator, and the resultant is filtered by using a membrane filter to obtained a refinned magnetic paint.

6. 发明专利

JPS56148769A SERVO CONTROL METHOD 失效
公开(公告)号：JPS56148769A
公开(公告)日：1981-11-18
申请号：JP4953880
申请日：1980-04-17
申请人： FUJITSU LTD
发明人： SUENAGA TADATOSHI , MAEDA MIYOZOU
IPC分类号： G05D3/12 , G11B5/596 , G11B21/10
摘要： PURPOSE:To prevent a shift in track position by providing a magnetic disk with a data track and a servo track shifting in a half pitch and by further providing a magnetic head with a servo gap and data gap in one. CONSTITUTION:In part of a data track group on magnetic disk 21, servo tracks S0-S3 are interposed shifting from the data tracks by a half pitch each in the radius direction. Magnetic head 22 has a data gap and servo gap in one. At the lead-in side of head 22, servo gap Gs is provided to position head 22 on a prescribed data track. At the lead-out side, data gap Gd is provided to run the head in the center of a prescribed data track under the guidance of gap Gs. Gap Gd, therefore, run on a track without fail. This constitution prevents a shift in track position due to the deformation, etc., of the mechanism part in the device.

7. 发明专利

JPS56143520A MAGNETIC TAPE FOR BOTH-SIDE RECORDING 失效
公开(公告)号：JPS56143520A
公开(公告)日：1981-11-09
申请号：JP4615580
申请日：1980-04-10
申请人： FUJITSU LTD
发明人： MINAMI AKIRA , GOTOU YASUYUKI , NARUMI TOSHIKATSU , MAEDA MIYOZOU
IPC分类号： G11B5/66 , C09D5/23 , C09D7/12 , G11B5/667 , G11B5/716 , G11B5/718 , G11B5/738
摘要： PURPOSE:To enable both-side recording by providing an induction path for a magnetic field between magnetic recording medium layers. CONSTITUTION:On both sides of base layer 12, layers 11 and 11' for a magnetic field induction path made of a material of low coercive force and high magnetic permeability, such as permalloy, are provided and at both the sides of them, magnetic recording medium layers 13 and 13' are provided. The layer for the magnetic field induction path may be provided on only one side and the base layer is also used tp form the magnetic field induction path.

8. 发明专利

JPS56130836A MANUFACTURE FOR MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS56130836A
公开(公告)日：1981-10-14
申请号：JP3220280
申请日：1980-03-14
申请人： FUJITSU LTD
发明人： ISHIDA SHIYOUJI , MAEDA MIYOZOU
IPC分类号： G11B5/84
摘要： PURPOSE:To make surface processing of magnetic disc without producing flaw on the recorded surface, by using the wrapping tape immersed with lubricant. CONSTITUTION:The base 1 such as polyamide or polyimide is provided, which has the heat resistance similar to the curing temperature of the thermosetting resin binder. Further, on this base, while the magnetic disc providing the magnetic film 2 having the projection 3 like aluminum powder is slided toward the arrow 6, by taking the thermosetting resin like epoxy resin, phenolic resin and melamine resin as the binder, wrapping is made with the magnetic head 4 laminating the wrappng tape 5 immersed with the lubricant such as fluorocarbon.

9. 发明专利

JPS60202541A MANUFACTURE OF MAGNETIC RECORDING MEDIUM 失效
公开(公告)号：JPS60202541A
公开(公告)日：1985-10-14
申请号：JP5724184
申请日：1984-03-27
申请人： FUJITSU LTD
发明人： FUKUSHIMA SHIGERU , SUENAGA TADATOSHI , TAKAHASHI JIYUN , NARUMI TOSHIKATSU , MAEDA MIYOZOU , ITOU KENICHI
IPC分类号： G11B5/71 , C09D5/23 , C09D129/00 , C09D129/10 , C09D133/04 , C09D133/06 , C09D163/00 , C09D171/00 , C09D171/10 , C09D175/00 , C09D175/04 , C10M107/38 , C10N40/18 , G11B5/842
摘要： PURPOSE:To impregnate a magnetic coated film with more lubricant without causing any signal errors by dispersing a thermoplastic resin which is compatible with a thermosetting resin uniformly and finely in a magnetic paint, curing the thermosetting resin incompletely, and then extracting and removing the thermoplastic resin with a solvent. CONSTITUTION:A magnetic paint composition contg. magnetic powder, a thermosetting resin, and a thermoplastic resin which is compatible with the thermosetting resin is prepared, and the magnetic paint composition is coated on a substrate to form a magnetic coated film. Subsequently, the substrate coated with the magnetic coated film is primarily baked to cure the magnetic coated film incompletely, and then the thermoplastic resin is extracted and removed from the incompletely cured coated film by using a solvent. The substrate having the magnetic coated film is secondarily baked to cure the magnetic film completely, and the micropores formed in the magnetic coated film is impregnated with a lubricant. The magnetic coated film is composed preferably of 55-75wt% magnetic powder and the remainder of resin, and 5-30wt%, based on the total resin, thermoplastic resin is used.

10. 发明专利

JPS6059532A POLISHING HEAD OF MAGNETIC DISC 失效
公开(公告)号：JPS6059532A
公开(公告)日：1985-04-05
申请号：JP16675183
申请日：1983-09-12
申请人： FUJITSU LTD
发明人： NARUMI TOSHIKATSU , SUENAGA TADATOSHI , MAEDA MIYOZOU , FUKUSHIMA SHIGERU , TAKAHASHI JIYUN
IPC分类号： G11B5/84
摘要： PURPOSE:To polish the surface of a coat uniformly and to reduce the number of reciprocating times of a polishing head by forming an interference material between a polishing tape and a base to which the tape is to be fitted. CONSTITUTION:In the head to be used for the polishing of the surface of the coat which is one of magnetic disc manufacturing processes, a silicone rubber film is formed as the interference material 4 between the base part 2 on the leading end of an arm 1 and the polishing tape 3. The surface of the magnetic disc 5 is polished by reciprocating the polishing head in the radius direction of the disc 5 while rotating the disc 5, so that the coat on the surface of the disc 5 can be evenly polished for a short time.

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