A vertical magnetic recording medium is provided with a substrate, a soft magnetic layer, a sub-base layer, a base layer and a main recording layer, i.e., a magnetic recording layer. The sub-base layer contains a seed crystal grains to be a base for crystal grains for the base layer, and an added material which is added between the seed crystal grains and is composed of an element having an atomic radius smaller than that of an element constituting the seed crystal grain.
G11B 5/738 - Couches de base caractérisées par la couche intermédiaire
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
A perpendicular magnetic recording medium comprises a magnetic recording layer (22) with a granular structure in which a grain boundary portion made of a nonmagnetic substance is formed between grains containing cobalt (Co) and grown in a columnar shape and a continuous layer (24) constituted by a thin film magnetically continuous in a surface direction. The perpendicular magnetic recording medium is characterized in that the continuous layer 24 includes layers (24a, 24b) containing cobalt, chromium (Cr), and platinum (Pt), and the layer (24a) out of the layers which is closer to the magnetic recording layer has a higher content of chromium.
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
[PROBLEMS] To provide a vertical magnetic recording medium which can reduce a noise by further reducing the size of magnetic particles and isolating each of the particles in a magnetic recording layer and improve the SNR so as to increase the recording density. [MEANS FOR SOLVING PROBLEMS] A vertical magnetic recording medium (100) includes a magnetic recording layer (122) having a granular structure in which a non-magnetic particle boundary portion is formed between magnetic particles which have grown continuously in a columnar shape. The particle boundary portion contains a plurality of types of oxides.
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
4.
VERTICAL MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING THE SAME
A vertical recording magnetic medium is provided with, on a disc base body (110), a soft magnetic layer (14), a magnetic recording layer (22), a continuous layer (24) magnetically continuous in the in-plane direction of a base body, a blocking layer (25) for blocking a shock applied to the continuous layer, and a carbon containing medium protecting layer (28) formed on the blocking layer.
G11B 5/72 - Revêtements protecteurs, p. ex. antistatiques
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/84 - Procédés ou appareils spécialement adaptés à la fabrication de supports d'enregistrement
5.
MAGNETIC DISK, AND MAGNETIC DISK MANUFACTURING METHOD
Provided is a magnetic disk (10) for a magnetic recording, which comprises a magnetic layer (4) for a magnetic recording, a protecting layer (5) formed over the magnetic layer (4) for protecting the magnetic layer (4), and a lubricating layer (6) formed over the protecting layer (5). The protecting layer (5) is a layer composed substantially of carbon, hydrogen and nitrogen. The atomic weight ratio (N/C) of nitrogen and carbon, which was derived from the spectral intensities of N1s and C1s detected for a detection angle of 7 degrees of photoelectrons by an angularly resolved X-ray photoelectron spectroscopy, is 0.15 to 0.25. This constitution of the protecting layer (5) provides a magnetic disk, which is excellent in wear resistance and sliding characteristics even for a film thickness of 3 nm or less and which can avoid a high fly write trouble or the like.
Provided is a magnetic recording medium which maintains high S/N ratio and coercive force (Hc) and has high recording density, even with fine magnetic particles, by further improving crystal orientation of a magnetic recording layer. The magnetic recording medium is provided with an orientation control layer (16), a nonmagnetic base layer (18), and a magnetic recording layer (22) on a substrate. The orientation control layer (16) has an fcc structure and a (111) plane parallel to the substrate. The base layer (18) has an hcp structure and a (0001) plane parallel to the substrate. An atomic distance of the (111) plane of the orientation control layer (16) is -0.2Å to +0.15Å to a lattice spacing of the base layer (18).
G11B 5/738 - Couches de base caractérisées par la couche intermédiaire
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
7.
VERTICAL MAGNETIC RECORDING MEDIUM AND ITS MANUFACTURING METHOD
A vertical magnetic recording disc (100) includes a base (10), a magnetic recording layer (22), and a medium protection layer (26). The magnetic recording layer (22) is a ferromagnetic layer having a granular structure where a granular portion is formed. The medium protection layer (26) contains nitrogen (N) and carbon (C) with an atomic mass ratio (N/C) in a range from 0.050 to 0.150. In a Raman spectrum obtained by exciting the medium protection layer (26) by argon ion laser light of wavelength 514.5 nm, from which a fluorescence is removed, the peak ratio Dh/Gh is in a range from 0.70 to 0.95, when a D peak Dh appearing in the vicinity of1350 cm-1 is separated from G peak Gh appearing in the vicinity of 1520 cm-1 by the Gauss function.
G11B 5/72 - Revêtements protecteurs, p. ex. antistatiques
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
G11B 5/84 - Procédés ou appareils spécialement adaptés à la fabrication de supports d'enregistrement
8.
MAGNETIC RECORDING MEDIUM, MAGNETIC RECORDING MEDIUM MANUFACTURING METHOD, AND MAGNETIC DISK
[PROBLEMS] To improve the track density by reducing the track edge noise and sharpening the boundary between the recording magnetic fields by blocking the recording magnetic field spreading outside the recording region in magnetic recording. [MEANS FOR SOLVING PROBLEMS] A magnetic recording medium (10) has a substrate (12) and a vertical magnetic recording layer (30) formed over the substrate (12). The vertical magnetic recording layer (30) has a granular layer (20) in which a magnetic signal is recorded and a continuous film layer (24) magnetically coupled to the granular layer (20). The continuous film layer (24) has hard magnetic parts (204) formed in positions corresponding to the recording regions where magnetic signals are recorded in the granular layer (20) and magnetic shield parts (202) formed between the hard magnetic parts (204), each having a magnetization curve whose slope is larger than those of the hard magnetic parts in the region where the applied magnetic filed is zero when the magnetization curve is measured, and each having a residual magnetic polarization smaller than those in the hard magnetic parts.
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/85 - Revêtement d'un support avec une couche magnétique par dépôt en phase vapeur
9.
METHOD FOR MANUFACTURING MAGNETIC RECORDING MEDIUM AND METHOD FOR MANUFACTURING LAMINATED BODY
[PROBLEMS] To have a thin film suitably function even when the thickness of the thin film is reduced. [MEANS FOR SOLVING PROBLEMS] Provided is a method for manufacturing a magnetic recording medium by forming a thin film on a substrate (12). The method is provided with a thin film forming step of forming the thin film by using a substance brought into the plasma state as a material. In the thin film forming step, the thin film is formed by using a material substance gathering means (30) for gathering the substance brought into the plasma state to the periphery of the substrate. The material substance gathering means (30) gathers the substance brought into the plasma state, for instance, to the periphery of the substrate (12) by generating a magnetic field at the periphery of the substrate (12).
C23C 16/50 - Revêtement chimique par décomposition de composés gazeux, ne laissant pas de produits de réaction du matériau de la surface dans le revêtement, c.-à-d. procédés de dépôt chimique en phase vapeur [CVD] caractérisé par le procédé de revêtement au moyen de décharges électriques
[PROBLEMS] To provide a magnetic recording medium having excellent electromagnetic conversion characteristics. [MEANS FOR SOLVING PROBLEMS] A magnetic recording medium (10) is provided with a substrate (12), and a magnetic recording layer (20) formed on the substrate (12). The magnetic recording layer (20) is provided with a granular layer (32), i.e., a magnetic layer, including magnetic particles and a nonmagnetic material surrounding the magnetic particles in a cross-section parallel to the main surface of the substrate. The ratio of the long diameter to the short diameter of each magnetic particle contained in the granular layer (32) is calculated in the cross-section. In the histogram of such ratio, a half width at half maximum of the histogram is 0.6 or less and dispersion of the magnetic particles in the cross-section is 20% or less of the average grain diameter of the magnetic particles.
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
11.
METHOD FOR MANUFACTURING VERTICAL MAGNETIC RECORDING DISC, AND VERTICAL MAGNETIC RECORDING DISC
Provided is a method for manufacturing a magnetic disc, which has at least a magnetic recording layer on a substrate (1) and is to be used for vertical magnetic recording. In a step of forming on a substrate (1) the magnetic recording layer, which is composed of a ferromagnetic layer (5) having a granular structure and an exchange energy control layer (7) composed of a lamination layer formed on the ferromagnetic layer (5), at least the exchange energy control layer (7) is formed by sputtering in a rare gas atmosphere having a mass larger than that of argon gas. The rare gas having a mass larger than that of argon gas is, for instance, krypton (Kr) gas. The exchange energy control layer (7) is, for instance, a lamination layer of a first layer including Co or a Co alloy and a second layer including palladium (Pd) or platinum (Pt).
G11B 5/851 - Revêtement d'un support avec une couche magnétique par pulvérisation cathodique
G11B 5/64 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/738 - Couches de base caractérisées par la couche intermédiaire
12.
VERTICAL MAGNETIC RECORDING DISK AND METHOD FOR MANUFACTURING THE SAME
[PROBLEMS] To provide a vertical magnetic recording disk, which has a film construction having improved overwriting properties (O/W) while maintaining a coercive force (Hc) maintained on such a level that does not affect thermal fluctuation resistance, and a method for manufacturing the same. [MEANS FOR SOLVING PROBLEMS] A magnetic disk for use in vertical magnetic recording, comprising a substrate and, provided on the substrate in the following order, at least a substrate layer, a first magnetic recording layer, and a second magnetic recording layer, characterized in that the first magnetic recording layer and the second magnetic recording layer are a ferromagnetic layer having a granular structure comprising a nonmagnetic material, which forms a grain boundary part among crystal grains containing at least Co (cobalt), and satisfy a requirement of A < B wherein A represents the content of a nonmagnetic material in the first magnetic recording layer, mol%; and B represents the content of the nonmagnetic material in the second magnetic recording layer, mol%.
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
Film deposition equipment comprises a base for holding a nonconductive substrate, and a bias applying means for applying a bias voltage to a conductive film deposited on the substrate by bringing a bias applying terminal into contact with the conductive film. The bias applying terminal is formed of a member which varies the shape depending on the temperature such as a shape memory alloy, and the bias applying terminal is brought into contact with the substrate held on the base or separated therefrom through deformation caused by temperature variation.
A processing data managing system includes: a processing device (11)(such as a sputtering device for manufacturing a magnetic disc) for repeating the same process for each cycle; a sampling unit (30) for collecting raw data on a processing condition in the processing device (such as a discharge condition); a calculation unit (100) for receiving the raw data, calculating the raw data according to a predetermined rule, and processing it as summary data expressing a characteristic point for each cycle (characteristic value: for example, average value, maximum value, minimum value, standard deviation, discharge time, and the like); a data storage unit (40) for storing the processed summary data in storage means; and a display/output unit (50) for chart-displaying the summary data stored in the storage means.
G05B 19/418 - Commande totale d'usine, c.-à-d. commande centralisée de plusieurs machines, p. ex. commande numérique directe ou distribuée [DNC], systèmes d'ateliers flexibles [FMS], systèmes de fabrication intégrés [IMS], productique [CIM]
C23C 14/00 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement
C23C 14/22 - Revêtement par évaporation sous vide, pulvérisation cathodique ou implantation d'ions du matériau composant le revêtement caractérisé par le procédé de revêtement
[PROBLEMS] To provide a manufacturing method by which a nucleation field of a magnetic recording layer of a magnetic recording layer can be easily improved in a vertical magnetic recording medium provided with a soft magnetic layer, the magnetic recording layer having a granular structure and a continuous layer having high perpendicular magnetic anisotropy on a substrate. [MEANS FOR SOLVING PROBLEMS] The method for manufacturing the vertical magnetic recording medium is provided with a soft magnetic layer forming step of forming the soft magnetic layer on the substrate; a magnetic recording layer forming step of forming the magnetic recording layer having the granular structure as an upper layer of the soft magnetic layer; a continuous layer forming step of forming the continuous layer having perpendicular magnetic anisotropy as an upper layer or a lower layer of the magnetic recording layer; and a heating step of heating a medium obtained by forming the continuous layer in the continuous layer forming step, for improving the value of the nucleation field.
G11B 5/851 - Revêtement d'un support avec une couche magnétique par pulvérisation cathodique
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
[PROBLEMS] To achieve a high level of coercive force (Hc) and a low level of noise properties (high S/N ratio) through simultaneous realization of segregation of SiO2 and a high level of vertical magnetic anisotropy by constructing a magnetic recording layer having a two-layer structure of layers having mutually different properties. [MEANS FOR SOLVING PROBLEMS] A magnetic disk for use in vertical magnetic recording, comprising a substrate and, provided on the substrate in the following order, at least a substrate layer (5), a first magnetic recording layer (6), and a second magnetic recording layer (7), characterized in that the first magnetic recording layer (6) and the second magnetic recording layer (7) are a ferromagnetic layer having a granular structure comprising a nonmagnetic material, which forms a grain boundary part among crystal grains containing at least Co (cobalt), and satisfy a requirement of A > B wherein A represents the content of a nonmagnetic material in the first magnetic recording layer (6), mol%; and B represents the content of the nonmagnetic material in the second magnetic recording layer (7), mol%.
G11B 5/66 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques
G11B 5/65 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison caractérisé par sa composition
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
A method is provided for manufacturing a magnetic disc having at least a substrate (1); a magnetic layer (3) formed on the substrate (1) for magnetic recording; and a protection layer (4) formed on the magnetic layer (3) to protect the magnetic layer (3). The protection layer (4) has a hydrocarbon protection film (4a) substantially composed of carbon and hydrogen, on the side of the magnetic layer (3). The magnetic disc manufacturing method is provided with a hydrocarbon protection film forming step of forming the hydrocarbon protection film (4a) in an atmosphere having a vacuum degree of 0.1Pa or more but no more than 2Pa, while performing plasma ignition by using an igniter for ensuring stable plasma discharge.
This invention provides a magnetic disk having a structure comprising a substrate layer provided between a glass substrate and a magnetic layer. The substrate layer comprises a metallic amorphous substrate layer provided on the glass substrate side and a body-centered cubic structure substrate layer provided on the magnetic layer side. The metallic amorphous substrate layer and the body-centered cubic structure substrate layer each may be formed of a plurality of layers, and a surface oxide layer is preferably provided on the surface of a metallic amorphous substrate layer. According to the above construction, the ratio between the residual magnetization in the circumferential direction of the magnetic disk and the residual magnetization in the radial direction of the magnetic disk can be brought to not less than 1, and the SN ratio can be improved.
G11B 5/738 - Couches de base caractérisées par la couche intermédiaire
G11B 5/667 - Supports d'enregistrement caractérisés par l'emploi d'un matériau spécifié comportant uniquement le matériau magnétique, sans produit de liaison les supports d'enregistrement étant constitués par plusieurs couches magnétiques comprenant une couche magnétique douce
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