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    INFRARED MICROSCOPIC FT-IR DEVICE AND ANALYZING METHOD OF RECORDING MEDIUM
    36.
    发明专利
    INFRARED MICROSCOPIC FT-IR DEVICE AND ANALYZING METHOD OF RECORDING MEDIUM 失效

    公开(公告)号：JP2000146830A

    公开(公告)日：2000-05-26

    申请号：JP8119699

    申请日：1999-03-25

    Applicant: SONY CORP

    Inventor： KISHII NORIYUKI ,  KAMEI TAKAHIRO ,  KOBAYASHI TAKESHI

    IPC: G01N21/27 ,  G01N21/35 ,  G01N21/552

    Abstract: PROBLEM TO BE SOLVED: To provide an infrared microscopic FT-IR device and an analyzing method capable of performing qualitative/quantitative analysis, conveniently and accurately, on an organic material for the surface part of a high-density recording medium. SOLUTION: This device is made up of an interference light source part 10, a measuring part 20, and a signal processing part 30, and the measuring part 20 is provided with a hemispheric prism 21 made of Ge. an incident angle varying device 22, and a detector 23 for sensing totally reflected light from a surface of a sample, in a closed sample chamber. The incident angle varying device 22 is made up of a pair of parabolic mirrors disposed opposite to each other. When analysis is performed by a single- beam measurement device, a magnetic-layer side surface of a floppy disk as a sample S is brought into close contact with a bottom surface of the prism at a contact pressure of 10 kgf/cm2 or less. An incident angle θ of infrared rays to the prism is scanned, and a spectrum of infrared rays totally reflected by the sample surface is analyzed by the FT-IR device. Similar operation is performed for a reference R, and a depthwise profile is found of the density of an organic lubricant contained in the magnetic layer of the sample.

    Magnetic recording and reproducing device
    37.
    发明专利
    Magnetic recording and reproducing device 审中-公开
    磁记录和再现设备

    公开(公告)号：JP2000076642A

    公开(公告)日：2000-03-14

    申请号：JP24641098

    申请日：1998-08-31

    Applicant: Sony Corp ,  ソニー株式会社

    Inventor： MATSUZAWA NOBUYUKI ,  KISHII NORIYUKI ,  KOBAYASHI TAKESHI ,  KAMEI TAKAHIRO ,  KURIHARA KENICHI ,  IWAMOTO HIROSHI ,  OSUE TADASHI ,  KABAYA YOSHITERU

    IPC: C09D5/23 ,  G11B5/41 ,  G11B5/708 ,  G11B5/72

    Abstract: PROBLEM TO BE SOLVED: To provide a magnetic recording and reproducing device which surely suppresses the occurrence of seizing material without causing any gradation of characteristics by wear.
    SOLUTION: In this helical scanning type magnetic recording and reproducing device equipped with a magnetoresistance effect reproducing head or induction thin film magnetic head, a magnetic recording medium or a cleaning tape holding a seizing inhibitor is travelled. The seizing inhibitor contains a compound having a pyridine skeleton and two or more coordination positions. The compound having a pyridine structure and two or more coordination positions has excellent complex-forming ability with metal atoms so that metal oxides produced on the surface of the head 6a, 6b are changed into complex salts, which easily drop off from the surface of the head 6a, 6b and do not remain on the head surface.
    COPYRIGHT: (C)2000,JPO

    Abstract translation: 要解决的问题：提供一种磁性记录和再现装置，其可靠地抑制卡住材料的发生而不会由于磨损而引起任何特性的等级。 解决方案：在配备有磁阻效应再现头或感应薄膜磁头的螺旋扫描型磁记录和再现装置中，移动了磁记录介质或保持着色抑制剂的清洁带。 卡滞抑制剂含有具有吡啶骨架和两个或更多个配位位置的化合物。 具有吡啶结构和两个或更多个配位位置的化合物与金属原子具有优异的络合物形成能力，使得在头部6a，6b的表面上产生的金属氧化物变成络合盐，其容易从 头部6a，6b，并且不保留在头部表面上。

    MAGNETIC RECORDING MEDIUM
    38.
    发明专利
    MAGNETIC RECORDING MEDIUM 失效

    公开(公告)号：JPH11213381A

    公开(公告)日：1999-08-06

    申请号：JP1067598

    申请日：1998-01-22

    Applicant: SONY CORP

    Inventor： KURIHARA KENICHI ,  KISHII NORIYUKI ,  KAMEI TAKAHIRO ,  KOBAYASHI TAKESHI

    IPC: G11B5/702 ,  G11B5/708

    Abstract: PROBLEM TO BE SOLVED: To disperse magnetic powder at a high degree and to obtain high electromagnetic transduction characteristics at a high-density recording region and good traveling durability by compounding a dihyroxybenzene compd. with a magnetic layer contg. the magnetic powder and a binder. SOLUTION: The dihydroxynbenzene compd. expressed by the formula is incorporated into the magnetic layer. In the formula, R , R , R , R are each -SO3 Nm -OSO3 M,-COOM,-OH, NR R -NR R R x , etc.; M is hydrogen or an alkali metal; R , R , R are each hydrogen or an alkyl; X is a halogen. The alkali metal to be introduced into M is lithium, potassium, sodium, etc., and the halogen to be introduced into X is chlorine, bromine, etc. As a result, the dihydroxybenzene compd. is stably adsorbed to the magnetic powder surface via a functional group, such as OH group and disperses the fine magnetic powder at a high speed into the magnetic layer, thereby shortening the dispersion time and making it possible to obtain the excellent electromagnetic transduction characteristics of a high density.

    MAGNETIC RECORD MEDIUM
    39.
    发明专利
    MAGNETIC RECORD MEDIUM 失效

    公开(公告)号：JPH11126326A

    公开(公告)日：1999-05-11

    申请号：JP29119097

    申请日：1997-10-23

    Applicant: SONY CORP

    Inventor： KURIHARA KENICHI ,  KISHII NORIYUKI

    IPC: C09D5/23 ,  G11B5/712 ,  G11B5/842 ,  H01F1/06

    Abstract: PROBLEM TO BE SOLVED: To improve dispersibility of a metal magnetic powder in a magnetic layer and to improve electromagnetic conversion characteristics by incorporating a phenylhydroxyl amine compd. or aromatic diazo compd. as a dispersant of a magnetic layer comprising a metal magnetic powder and a binder into the magnetic layer. SOLUTION: Relating to a magnetic layer produced by applying a magnetic coating material essentially comprising a metal magnetic powder having >=35 m /g specific surface area and a binder, a phenylhydroxyl amine compd. or aromatic diazo compd. (hereinafter called as ligand) is subjected to coordination adsorption to the magnetic powder. These ligands are mixed with the metal magnetic powder and the binder during the magnetic coating material is prepared, and the mixed material is kneaded and dispersed with a solvent to carry out coordination adsorption to the metal magnetic powder. The ligands coordinated and adsorbed to the surface of the metal magnetic powder inhibit aggregation of metal magnetic powder particles, and therefore, the ligands act as a dispersant to improve the dispersibility of the metal magnetic powder in the binder.

    MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION
    40.
    发明专利
    MAGNETIC RECORDING MEDIUM AND ITS PRODUCTION 失效

    公开(公告)号：JPH10188265A

    公开(公告)日：1998-07-21

    申请号：JP34423296

    申请日：1996-12-24

    Applicant: SONY CORP

    Inventor： KURIHARA KENICHI ,  KISHII NORIYUKI ,  KAMEI TAKAHIRO ,  WATANABE HARUO

    IPC: C09D5/23 ,  C09D7/12 ,  G11B5/708 ,  G11B5/842

    Abstract: PROBLEM TO BE SOLVED: To make it possible to prevent the degradation in the output of spacing loss by the accumulation of burned matter on a magnetic head and to lower and suppress an error rate by adding polyglycerol fatty acid ester and either of bipyridine deriv. or phenanthrene deriv. to a magnetic layer. SOLUTION: The magnetic layer is formed by applying a magnetic coating material composed mainly of ferromagnetic powder and binder on a nonmagnetic base. At the time of preparing the magnetic coating material, the ferromagnetic powder is previously subjected to a surface treatment with the polyglycerol fatty acid ester and the powder and the ligand of the bipyridine deriv. or phenanthrene deriv. are kneaded and dispersed together with the binder. As a result, the polyglycerol fatty acid ester is adsorbed on the ferromagnetic powder to improve the dispersibility of the ferromagnetic powder. In addition, the coordination of the ligand to the ferromagnetic powder is prevented. The ligand alone disperses to the magnetic layer or adheres to the surface of the magnetic layer. The ligand prevents the accumulation of the burned matter as a complex to easily desorb the burned matter by making complex forming reaction with the burned matter on the surface of the magnetic head.

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