Abstract: The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including: a base material having convex portions on its surface, the convex portions being provided corresponding to the pattern of information; a magnetic layer deposited on at least top surfaces of the convex portions, and having perpendicular magnetic anisotropy; and a soft magnetic layer deposited on the surface of the magnetic layer.

Abstract: A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

Abstract: To provide a magnetic transfer master carrier to be placed on a perpendicular magnetic recording medium so as to transfer magnetic information to the medium by application of a magnetic field, the magnetic transfer master carrier including: transfer portions that include a magnetic layer and correspond to the magnetic information; and non-transfer portions which are lower in height than the transfer portions that include the magnetic layer, and each of which has a concave shape, wherein the magnetic layer has perpendicular magnetic anisotropy, and the magnetic anisotropy energy of the magnetic layer is less than 4×106 erg/cm3.

Abstract: To provide a method for producing a magnetic transfer master carrier, including: plating a patterned silicon substrate with nickel so as to form a base material on the silicon substrate; separating the base material from the silicon substrate; and etching a surface of the base material so as to obtain an oriented base material, wherein the magnetic transfer master carrier includes the oriented base material, a thin underlying layer formed on the oriented base material, and a magnetic layer formed on the thin underlying layer.

Abstract: A magnetic transfer master carrier including a base material having, in its surface, convex portions arranged correspondingly to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer having perpendicular magnetic anisotropy, the layer being provided on top and side surfaces of the convex portions, wherein the magnetic transfer master carrier forms a magnetic field pattern corresponding to the pattern of the information when a magnetic field is applied thereto.

Abstract: The present invention provides a magnetic transfer master carrier which forms a magnetic pattern corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium when a magnetic field is applied to the perpendicular magnetic recording medium, with the magnetic master carrier and the perpendicular magnetic recording medium closely attached to each other, the carrier including: a base material having convex portions on its surface, the convex portions being provided corresponding to the pattern of information; a magnetic layer deposited on at least top surfaces of the convex portions, and having perpendicular magnetic anisotropy; and a soft magnetic layer deposited on the surface of the magnetic layer.

Abstract: To provide a resist pattern forming method including: cleaning off fine powder at least on an edge of a base material to be processed; forming an imprint resist layer on a surface of the base material whose edge has been cleared of the fine powder; and forming a resist pattern on the surface of the base material by pressing, against the imprint resist layer, a concavo-convex pattern which is provided in a surface of a concavo-convex mold and which is composed of a plurality of convex portions and concave portions formed between the convex portions, so that the resist pattern is an inversion of the concavo-convex pattern.

Abstract: To provide a magnetic transfer master carrier obtained by forming a perpendicular magnetic anisotropy magnetic layer over a surface of an original master which has a concavo-convex pattern, placing a base material against the formed perpendicular magnetic anisotropy magnetic layer, and separating the base material.

Abstract: A magnetic transfer master carrier of the present invention includes a base material having convex portions on its surface, the convex portions being provided corresponding to a pattern of information to be recorded on a perpendicular magnetic recording medium, and a magnetic layer deposited at least on top surfaces of the convex portions, wherein when a magnetic field is applied to the magnetic transfer master carrier, the magnetic layer absorbs a magnetic flux so as to form a pattern of the magnetic field, wherein the magnetic layer includes at least two perpendicular magnetic anisotropic layers, and an antiferromagnetic coupling induction layer which is provided so as to be sandwiched in between two neighboring layers of all the perpendicular magnetic anisotropic layers, and to induce antiferromagnetic coupling therebetween.

Abstract: To provide a magnetic transfer master carrier including a base material, a concavo-convex pattern formed by arranging a plurality of convex portions on a surface of the base material, and a magnetic layer provided at least on upper surfaces of the convex portions, wherein the magnetic layer is formed by an ion gun deposition method in which a target material is irradiated with an ion beam and a layer is deposited with sputter particles sputtered from the target material.

Abstract: A magnetic transfer master substrate for transferring magnetic information thereof to a perpendicular recording magnetic recording medium in contact therewith under application of a magnetic field comprises a transfer surface area with a magnetic layer formed thereon in a pattern according to the magnetic information to be transferred to the perpendicular magnetic recording medium and a non-transfer surface area laying below said transfer surface area, wherein the magnetic layer has a perpendicular magnetic anisotropy of an anisotropy energy higher than 4×106 erg/cm3.

Abstract: A master carrier for magnetic transfer having a data region and a servo pattern region that has a pattern of fine projections arrayed in the track direction thereof in accordance with the preformat signal information to be transferred onto an in-plane magnetic recording medium is disclosed. The data region has a projection formed of a material such as carbon-based material that differs from the material of the servo pattern region.

Abstract: In a master carrier for magnetic transfer which comprises a data region and a servo pattern region that has a pattern of fine projections arrayed in the track direction thereof in accordance with the preformat signal information to be transferred onto an in-plane magnetic recording medium, the data region have a projection formed of a material such as carbon-based material that differs from the material of the servo pattern region.

Abstract: A master information carrier includes a substrate having a pattern of protrusions and recesses corresponding to information to be transferred to a slave medium and a magnetic layer formed on the pattern of protrusions and recesses of the substrate. Further, an entire area of the magnetic layer on the pattern of protrusions and recesses is coated with a protective coating and a surface free energy of the protective coating is in a range of 57 mN/m-69 mN/m. A DLC coating is preferable as the protective coating.

Abstract: A sheet post-processing apparatus includes a head unit and an anvil unit movably disposed in a direction traversing the sheet discharge direction to provide a staple into a sheet bundle. A gap detecting device for detecting a gap between the head part and the anvil part is formed. If the gap is insufficient, the head part and the anvil part are not moved relative to the sheet bundle.

Abstract: A sheet post-processing apparatus includes a head unit and an anvil unit movably disposed in a direction traversing the sheet discharge direction to provide a staple into a sheet bundle. A gap detecting device for detecting a gap between the head part and the anvil part is formed. If the gap is insufficient, the head part and the anvil part are not moved relative to the sheet bundle.

Abstract: An electrophotographic toner which can be fixed at a low fixing temperature, causes no practical problem on offsetting-free properties and has excellent fixing strength to a transfer sheet, and a process for the production thereof, the toner containing a binder resin and a colorant as main components and further containing a Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal and having a melt viscosity, measured at 110.degree. C., of 1.times.10.sup.5 to 1.times.10.sup.6 poise, the process comprising solution-polymrerizing, suspension-polymerizing or emulsion-polymerizing a vinyl-containing monomer in which the Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal are/is dissolved in advance, to prepare the binder resin.

Abstract: An electrophotographic toner which can be fixed at a low fixing temperature, causes no practical problem on offsetting-free properties and has excellent fixing strength to a transfer sheet, and a process for the production thereof, the toner containing a binder resin and a colorant as main components and further containing a Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal and having a melt viscosity, measured at 110.degree. C., of 1.times.10.sup.5 to 1.times.10.sup.6 poise, the process comprising solution-polymrerizing, suspension-polymerizing or emulsion-polymerizing a vinyl-containing monomer in which the Fischer-Tropsch wax formed from natural gas and/or a Fischer-Tropsch wax formed from coal are/is dissolved in advance, to prepare the binder resin.

Abstract: A biodegradable or hydrolyzable toner for electrophotography, which permits the easy reclaiming and recycling of used copying paper, permits the easy deinking by an existing deinking system, can decrease environmental pollution caused by a toner waste, and has excellent toner properties owing to the uniform dispersion of additives, the toner containing, as a binder resin, a lactic acid-based resin of the formula (1),H--[--O--CH(CH.sub.3)--CO--].sub.n --OR (1)wherein R is an alkali metal or an alkaline earth metal, and n is an integer of 10 to 20,000.

Abstract: A resin composition for a toner comprising a polymer made of styrene/(meth)acrylic ester copolymers, a thermoplastic polyesterurethane resin having a weight average molecular weight in a range of 5,000 to 500,000, and a vegetable wax having a melting point in a range of 65.degree. to 90.degree. C.