Abstract: A magnetic recording medium includes a substrate, an underlayer provided on the substrate, and a magnetic layer provided on the underlayer and having a L10 structure and a (001) orientation. The magnetic layer has a granular structure in which an organic compound having a methylene skeleton or a methine skeleton is arranged at grain boundaries of magnetic grains.

Abstract: A magnetic recording medium includes a substrate, a barrier layer, a crystal grain size control layer, and a magnetic layer that are arranged in this order. The barrier layer includes at least one of oxides, nitrides, and carbides, and the crystal grain size control layer is a crystalline layer including Ag and having an average thickness in a range of 0.1 nm to 1 nm. The barrier layer makes contact with the crystal grain size control layer, and the magnetic layer includes an alloy having a L10 crystal structure and a (001) face orientation.

Abstract: A magnetic recording medium includes a substrate, a barrier layer, a crystal grain size control layer, and a magnetic layer that are arranged in this order. The barrier layer includes at least one of oxides, nitrides, and carbides, and the crystal grain size control layer is a crystalline layer including Ag and having an average thickness in a range of 0.1 nm to 1 nm. The barrier layer makes contact with the crystal grain size control layer, and the magnetic layer includes an alloy having a L10 crystal structure and a (001) face orientation.

Abstract: According to the present invention, a magnetic recording medium is provided including a disk-shaped non-magnetic substrate and at least a perpendicular magnetic layer formed on the disk-shaped non-magnetic substrate, wherein the perpendicular magnetic layer has a structure in which an FePt or CoPt nanoparticle array is formed on a formation surface, on which a plurality of striations each having a circumferential directional component are formed, by a texturing treatment; a manufacturing method thereof; and a magnetic record/reproduction apparatus including the magnetic recording medium or a magnetic recording medium manufactured according to the manufacturing method.

Abstract: A method of manufacturing a magnetic recording medium is provided. The method includes: forming a magnetic layer 2 on a non-magnetic substrate 1; forming a mask layer 3 on the magnetic layer 2; forming a resist layer 4 which is patterned into a predetermined shape on the mask layer 3; patterning the mask layer 3 into a shape corresponding to the resist layer 4 using the resist layer 4; patterning the magnetic layer 2 into a shape corresponding to the mask layer 3 using the patterned mask layer 3; and removing the mask layer 3 that remains on the magnetic layer 2 by reactive plasma etching. The reactive plasma etching is performed under an atmosphere containing an organic compound having at least one kind or plural kinds of functional groups selected from a hydroxyl group, a carbonyl group, a hydroxy carbonyl group, an alkoxy group, and an ether group.

Abstract: A method of manufacturing a magnetic recording medium is provided, which include: forming a magnetic layer on the surface of a nonmagnetic substrate; forming a groove in which a nonmagnetic section is formed by etching a portion corresponding to a formation region of the nonmagnetic section in the magnetic layer and a magnetic recording section formed of the magnetic layer; applying a resin having an active energy ray curable functional group to the surface of the magnetic recording section so as to fill the groove; pressing a plate material against the resin so that the smooth surface of the plate material is in contact with the surface of the resin to make the surface of the resin smooth; removing the plate material from the resin; and forming the nonmagnetic section in the groove by etching and removing a portion located above the surface of the magnetic recording section in the resin having a smooth surface.

Abstract: According to the present invention, a magnetic recording medium is provided including a disk-shaped non-magnetic substrate and at least a perpendicular magnetic layer formed on the disk-shaped non-magnetic substrate, wherein the perpendicular magnetic layer has a structure in which an FePt or CoPt nanoparticle array is formed on a formation surface, on which a plurality of striations each having a circumferential directional component are formed, by a texturing treatment; a manufacturing method thereof; and a magnetic record/reproduction apparatus including the magnetic recording medium or a magnetic recording medium manufactured according to the manufacturing method.

Abstract: A method for producing a magnetic recording medium which includes: forming a magnetic layer on a non-magnetic substrate; forming a dissolution layer on the magnetic layer; forming a mask layer on the dissolution layer; patterning the dissolution layer and the mask layer so as to have a pattern corresponding to a magnetic recording pattern; partially modifying or removing a part of the magnetic layer and the mask layer not covered with the dissolution layer; and dissolving the dissolution layer and removing the dissolution layer together with the mask layer which is on the dissolution layer from the surface of the magnetic layer. The dissolution layer is formed by coating a solution containing an organic silicon compound dissolved in an organic solvent on the magnetic layer, and solidifying the coated chemical solution in the step in which the dissolution layer is formed on the magnetic layer.

Abstract: A method of manufacturing a magnetic recording medium is provided, which include: forming a magnetic layer on the surface of a nonmagnetic substrate; forming a groove in which a nonmagnetic section is formed by etching a portion corresponding to a formation region of the nonmagnetic section in the magnetic layer and a magnetic recording section formed of the magnetic layer; applying a resin having an active energy ray curable functional group to the surface of the magnetic recording section so as to fill the groove; pressing a plate material against the resin so that the smooth surface of the plate material is in contact with the surface of the resin to make the surface of the resin smooth; removing the plate material from the resin; and forming the nonmagnetic section in the groove by etching and removing a portion located above the surface of the magnetic recording section in the resin having a smooth surface.

Abstract: There is provided a method for manufacturing a magnetic recording medium which manufactures media by employing the same in-line apparatus and which is capable of reducing the contamination due to the handling and of enhancing the productivity, the method for manufacturing a magnetic recording medium characterized by including, in the following order: a mounting step where a nonmagnetic substrate onto which at least a magnetic recording layer and a mask layer for patterning the magnetic recording layer have been laminated is mounted on a carrier; a reforming step where a portion of the magnetic recording layer which is not covered with the mask layer is subjected to a reactive plasma treatment or an ion irradiation treatment to reform the magnetic properties, thereby forming a magnetic recording pattern constituted of a remaining magnetic material; a removal step in which the mask layer is removed; a protective film forming step in which a protective film is formed on top of the magnetic recording layer; an

Abstract: An in-line film forming apparatus is provided which prevents uneven processing from occurring when reactive plasma treatment or ion irradiation treatment is performed on a substrate held by a carrier. A carrier (25) includes a holder (28) provided with a hole (29) which allows a substrate to be disposed therein, and a plurality of supporting members (30) attached to the periphery of the hole (29) of the holder (28) in an elastically deformable manner, and is capable of detachably holding the substrate fitted into the inside of the supporting members (30) while an outer peripheral portion of the substrate is made to abut on the plurality of supporting members (30). Within a chamber which performs reactive plasma treatment or ion irradiation treatment on the substrate held by the carrier (25), a ring member (32) having an opening (32a) in a position corresponding to the substrate is disposed so as to face at least one surface or both surfaces of the substrate held by the carrier (25).

Abstract: A method for polishing or texturing a magnetic disc, comprises bringing a tape traveled in a predetermined direction and made of fibers having a fineness of not more than 0.1 denier, and a slurry containing polishing grains dispersed therein, into contact with a substrate of the magnetic disc. Such method has an extremely low surface roughness (Ra) and an extremely low maximum projection height (Rp) with an excellent high accuracy, thereby efficiently producing a magnetic recording medium which is free from head crash and errors upon reading and writing of information.

Abstract: A method of making a-magnetic record medium comprising the steps of: texturing a surface of a substrate by a first surface treatment; electrolyzing the surface of the textured substrate in an electrolyte of an acidic solution by applying an electric potential on the nonmagnetic substrate by a second surface treatment; and forming an undercoating layer and a magnetic layer on the surface of the electrolyzed substrate.