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: Applying a magnetic field that varies like a single pulse from a start magnetic field to a maximum transfer magnetic field and then to an end magnetic field to a stacked body of a magnetic transfer master carrier and a perpendicular magnetic recording medium such that the time from the start magnetic field to the end magnetic field does not exceed 100 ms. The master carrier has a transfer pattern of multiple fine elements. Each element has a planar shape formed of a plurality of rectangles, each having two sides parallel to a circumferential tangent line and two sides forming an angle of 90±5° with the circumferential tangent line, arranged continuously in a track width direction. A side of the planar shape of each element intersecting the circumferential tangent line has an effective inclination corresponding to a skew angle of the read/write head.

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: A magnetic transfer master carrier to be placed on a perpendicular magnetic recording medium, including: a concavo-convex pattern corresponding to magnetic information to be transferred to the medium by application of a magnetic field, wherein a length (La) of a convex portion in the concavo-convex pattern and a length (Sa) of a space between the convex portion and another convex portion adjacent to the convex portion satisfy 1.3?(Sa/La)?1.9, and wherein a cycle length (La+Sa) is in the range of 50 nm to 145 nm, where the length (La) is the width of the convex portion with respect to a circumferential direction measured at a height equivalent to 50% of the height of the convex portion, and the length (Sa) is the width of the space with respect to the circumferential direction measured at the height equivalent to 50% of the height of the convex portion.

Abstract: A mold structure including a disc-shaped base material; a concavo-convex pattern formed on one surface of the base material; and a member extendable and contractible by an external force.

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: Provided is an imprint mold structure containing: a substrate; and a concave-convex portion formed by arranging on one surface of the substrate convex portions with reference to the surface, the imprint mold structure being used for an imprint method containing a transferring step and a curing step, wherein the imprint mold structure satisfies the following formula 1: HBR<HMS<HAR ??Formula 1 where HMS is a hardness of an outermost surface on the transfer side of the imprint mold structure, HBR is a hardness of the imprint resist layer in the transferring, HAR is a hardness of the imprint resist layer after the curing, and HMS is 1 GPa or less.

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 television switch module for switching output lines of television high frequency signals, comprising: first and second input lines for respectively inputting television high frequency signals; first and second amplifiers for respectively amplifying input signals; first and second output lines for outputting the signals after amplified; a branching unit for branching an input signal; a relay switch for switching the signal lines; a relay switch control means for operation to switch the relay switch; and a power supply control means for controlling power supply to the respective amplifiers, and for stopping the power supply to an amplifier inserted in an unused input line. This makes it possible to operate only a necessary amplifier, and to reduce power consumption.

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: The present invention provides an imprint mold structure which can efficiently and uniformly transfer a pattern by enhancing flow of a composition of the imprint resist layer when the imprint mold structure is pressed against the imprint resist layer, an imprinting method of improved transfer accuracy by using the imprint mold structure, and a magnetic recording medium of improved recording and reproduction property. Provided is an imprint mold structure in which at at least any one of an inner circumferential edge and an outer circumferential edge of the concavo-convex patterns in a data area and a servo area of the disc-shaped substrate of the imprint mold structure a dummy pattern is formed which corresponds to a pattern on a magnetic recording medium substrate extending radially from at least any one of an inner circumferential edge and an outer circumferential edge of a pattern forming area.

Abstract: When magnetically transferring information represented by a pattern of magnetic layer formed on a master information carrier to a disc-like slave medium, an initial DC magnetic field is applied to the slave medium to initially magnetize the slave medium in one direction of concentric recording tracks and a transfer magnetic field is applied to the slave medium in the direction opposite to the direction of the initial-magnetization with the initially-magnetized slave medium held in close contact with the master information carrier. At least one of applying the initial DC magnetic field and applying the transfer magnetic field is effected by applying the magnetic field while the slave medium is being rotated relatively to the magnetic field and stopping the rotation of the slave medium after the intensity of the magnetic field is gradually reduced to not stronger than a predetermined value.

Abstract: The present invention provides an apparatus for manufacturing a magnetic recording medium including, a mold structure formed of a disc-shaped substrate having on a surface thereof a concavo-convex pattern having convex portions which correspond to a servo area and a data area of a magnetic recording medium; and an imprinting and magnetic field applying unit which transfers a concavo-convex pattern on the basis of the concavo-convex pattern of the mold structure into an imprint resist layer that is made of an imprint resist composition and that is formed on a magnetic layer of a magnetic recording medium base by pressing the mold structure against the imprint resist layer, and which transfers magnetism to the servo area by application of a magnetic field via the mold structure.

Abstract: The imprint mold structure of the present invention is an imprint mold structure including at least a disc-shaped substrate having a concavo-convex pattern having a plurality of convex portions, wherein the imprint mold structure is used for transferring the concavo-convex pattern onto an imprint resist layer formed on magnetic recording medium substrate, with the concavo-convex pattern of the imprint mold structure being pressed against the imprint resist layer, wherein the shape of a vertical cross-section of the concavo-convex pattern taken on a line having a direction perpendicular to the direction in which the convex portion extends satisfies the following three Mathematical Expressions: (Mathematical Expression 1) 40°??<90°, (Mathematical Expression 2) SRas>SRab, (Mathematical Expression 3) LRah>LRav.

Abstract: A master information carrier has on its surface a signal area where an embossed pattern formed by protruding portions and recessed portions and representing a signal pattern to be transferred has been formed. The shortest bit length of the embossed patter is 300 nm or shorter, and the embossed pattern is formed so that the total of the areas of the upper surfaces of the protruding portions of the embossed pattern is smaller than the total of the areas of inter-protruding-portions in the signal area.

Abstract: To provide an interface binder for binding a resist layer and a laminate for forming magnetic recording medium having a substrate and a magnetic layer, the interface binder containing a first functional group crosslinkable with a surface of the laminate, and a second functional group crosslinkable with the resist layer.

Abstract: The present invention provides a method for producing a magnetic recording medium having servo areas and data areas using a mold structure. The method includes at least forming an imprint resist layer on a substrate surface of a magnetic recording medium, forming a convexo-concave pattern in the imprint resist layer by pressing convex portions of the mold structure against the imprint resist layer, and transferring magnetism to the servo areas in the magnetic recording medium by applying a magnetic field via the mold structure, wherein the imprint resist layer is formed only on areas of the substrate surface corresponding to the data areas in the magnetic recording medium, and the magnetic field is applied to areas of the substrate surface corresponding to the servo areas, with the areas of the substrate surface corresponding to the servo areas being in contact with convex portions of the mold structure.

Abstract: The present invention provides a method for producing a magnetic recording medium having servo areas and data areas using a mold structure having a plurality of convex portions, the method, including: forming an imprint resist layer on a surface of a substrate for the magnetic recording medium, forming a convexo-concave resist pattern in the formed imprint resist layer by pressing the plurality of convex portions of the mold structure against the imprint resist layer, and transferring magnetism to the servo areas in the magnetic recording medium by applying a magnetic field to the servo areas via the mold structure.

Abstract: A master information carrier for magnetic transfer includes a master substrate made of metal, including an embossed pattern corresponding to information to be transferred. The master substrate is produced by laminating a metal disk with a predetermined thickness on an original disk, on which an embossed pattern is formed, by electroforming, peeling off the metal disk and die-cutting a disk in a desired size. An outer diameter of the metal disk is at least 1.7 times longer than an outer diameter of the die-cut master substrate. When the metal disk is peeled off from the original disk, deformation due to the forces acting from the side of the outer circumference is reduced. The flatness of the metal disk is ensured and the transfer qualities are improved. Further, a step of removing distortion of the metal disk, caused at the time of peeling off the metal disk, may also be provided.