Abstract: A needle array transdermal absorption sheet to be attached onto a skin for supplying a drug into the skin, includes: a plurality of needle portions each having a tapered shape, each of the needle portions including a needle having a conical or pyramidal shape and a body part which has a columnar shape and whose end surface is connected to a base of the needle; a sheet portion having a flat-plate shape; and a plurality of frustum portions each having a frustum shape, the frustum portions which are arranged on a surface of the sheet portion in a manner that perimeters of larger bases of adjacent frustum portions are in contact with each other on the surface of the sheet portion, and smaller bases of which are respectively connected to the body parts of the needle portions.

Abstract: A needle array transdermal absorption sheet to be attached onto a skin for supplying a drug into the skin, includes: a plurality of needle portions each having a tapered shape, each of the needle portions including a needle having a conical or pyramidal shape and a body part which has a columnar shape and whose end surface is connected to a base of the needle; a sheet portion having a flat-plate shape; and a plurality of frustum portions each having a frustum shape, the frustum portions which are arranged on a surface of the sheet portion in a manner that perimeters of larger bases of adjacent frustum portions are in contact with each other on the surface of the sheet portion, and smaller bases of which are respectively connected to the body parts of the needle portions.

Abstract: A method for manufacturing a master disk for magnetic transfer, comprising the steps of electroforming a master substrate of a metal disk with a surface on which an convexoconcave pattern corresponding to information to be transferred is transferred using a reverse die with a reversed convexoconcave pattern, and forming a magnetic layer on the convexoconcave pattern of the master substrate, the method comprising the steps of: a conductive layer forming step to form a conductive layer with a thickness t1 on a surface of the reverse die; an initial electroforming step to form a first plated layer with a thickness t2 equal to or more than the thickness t1 of the conductive layer by plating a surface of the conductive layer at a current density of 0.35 A/dm2 or less; and a main electroforming step to form a second plated layer by plating a surface of the first plated layer at a current density of 0.35 A/dm2 or more.

Abstract: The present invention provides a method of manufacturing a master recording medium used for magnetic transfer and having a concavo-convex pattern formed on a surface of the recording medium, the method comprising: a surface treatment step of forming the concavo-convex pattern on a surface of a metal plate to fabricate a metal master disk; a monomolecular layer forming step of forming a monomolecular layer on a surface of the metal master disk, the surface having the concavo-convex pattern formed thereon; a metallic substrate forming step of dipping the metal master disk having the monomolecular layer formed thereon into a plating solution and forming the master recording medium by plating on the surface of the metal master disk, the surface having the monomolecular layer formed thereon; and an exfoliating step of exfoliating the master recording medium from the metal master disk.

Abstract: A method of producing a stamper for roughening a substrate of an optical recording medium contains the steps of placing a conductive ring having a hole at the center thereof on a major surface of an original metal plate, electroforming a metal layer over a portion of the metal plate exposed in the hole of the conductive ring, an inner end-face of the conductive ring, and a portion of a major surface of the conductive ring, and entirely or partly roughening a major surface of the metal layer by a blasting treatment to obtain an original stamper.

Abstract: In a method of producing a stamper for roughening a substrate of an optical recording medium, a masking treatment is carried out prior to a blasting treatment, whereby a second pit forming site of a metal plate is protected such that the second pit forming site is not broken in the following blasting treatment. A mask of an adhesive sheet is attached to the second pit forming site in the masking treatment, and then a part of one major surface of the metal plate, exposed between the mask, is roughened in the blasting treatment. An original stamper of the metal plate, having a partly roughened major surface, is obtained by the blasting treatment.

Abstract: There is provided a method for manufacturing a high quality master information carrier for magnetic transfer, the method preventing the metallic disk formed by electroforming from coming off from the conduction ring and decreasing the distortion of the master information carrier. A conduction ring connected to a cathode is arranged on a matrix and electroforming is performed with the conduction ring being smaller in bore diameter than a presser ring for fixing the conduction ring and the matrix.

Abstract: A disc-shaped original glass plate for producing a stamper for roughening a substrate of an optical recording medium, containing a circular 21st area within a radius D1 from the center of the original glass plate, a circular 22nd area within a radius D2 (>D1) from the center, a ring-shaped 23rd area obtained by omitting the 21st area from the 22nd area, and a ring-shaped 24th area obtained by omitting the 22nd area from an entire the major surface of the glass plate, wherein the 21st and 24th areas are lustrous, and the 23rd area is roughened. The surface roughness of the 23rd area is such that the arithmetic average roughness Ra is 0.05 to 2.0 ?m and the ten-point average roughness Rz is 0.1 to 5.0 ?m.

Abstract: The present invention provides a method of manufacturing a master recording medium used for magnetic transfer and having a concavo-convex pattern formed on a surface of the recording medium, the method comprising: a surface treatment step of forming the concavo-convex pattern on a surface of a metal plate to fabricate a metal master disk; a monomolecular layer forming step of forming a monomolecular layer on a surface of the metal master disk, the surface having the concavo-convex pattern formed thereon; a metallic substrate forming step of dipping the metal master disk having the monomolecular layer formed thereon into a plating solution and forming the master recording medium by plating on the surface of the metal master disk, the surface having the monomolecular layer formed thereon; and an exfoliating step of exfoliating the master recording medium from the metal master disk.

Abstract: A method for manufacturing a master disk for magnetic transfer, comprising the steps of electroforming a master substrate of a metal disk with a surface on which an convexoconcave pattern corresponding to information to be transferred is transferred using a reverse die with a reversed convexoconcave pattern, and forming a magnetic layer on the convexoconcave pattern of the master substrate, the method comprising the steps of: a conductive layer forming step to form a conductive layer with a thickness t1 on a surface of the reverse die; an initial electroforming step to form a first plated layer with a thickness t2 equal to or more than the thickness t1 of the conductive layer by plating a surface of the conductive layer at a current density of 0.35 A/dm2 or less; and a main electroforming step to form a second plated layer by plating a surface of the first plated layer at a current density of 0.35 A/dm2 or more.