Abstract: Disclosed is a to provide a curable composition for imprints capable of keeping a good patternability and of producing less defects even after repetitive pattern transfer. The curable composition for imprints comprising: a polymerizable compound (A); a photo-polymerization initiator (B); and a non-polymerizable compound (C) having a polyalkylene glycol structure having at least one terminal hydroxy group, or at least one etherified terminal hydroxy group, and containing substantially no fluorine atom and no silicon atom.

Abstract: Disclosed is a to provide a curable composition for imprints capable of keeping a good patternability and of producing less defects even after repetitive pattern transfer. The curable composition for imprints comprising: a polymerizable compound (A); a photo-polymerization initiator (B); and a non-polymerizable compound (C) having a polyalkylene glycol structure having at least one terminal hydroxy group, or at least one etherified terminal hydroxy group, and containing substantially no fluorine atom and no silicon atom.

Abstract: A nanoimprinting mold having high durability enables reduction of thickness fluctuations in resist. The mold is equipped with a patterned base plate having a patterned region, in which a fine pattern of protrusions and recesses is formed, on a first surface thereof, and a second surface having a 3? value related to a height difference distribution within a range from 1 nm to 6 nm; a hollowed base plate having a hollowed shape at least at a portion corresponding to the patterned region and a thickness greater than or equal to that of the patterned base plate; and a metal film formed between the patterned base plate and the hollowed base plate so as to bond the second surface of the patterned base plate and a surface of the hollowed base plate that faces the second surface.

Abstract: A production method of a magnetic transfer master carrier, the method including forming an imprint resist layer on a surface of a magnetic layer of a laminate which includes a first base material and the magnetic layer laminated thereon; forming a resist pattern, following shapes of concave portions of a mold, on the surface of the magnetic layer by pressing the concave portions against the imprint resist layer; and forming magnetic convex portions on the first base material by removing the mold from the imprint resist layer and then etching a surface of the magnetic layer which surface has no resist pattern, wherein the mold includes a second base material and the concave portions formed by etching a surface of the second base material so as to correspond to a pattern of information to be recorded on a magnetic recording medium

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: A magnetic recording medium comprising: a support; an under layer comprising at least one of a metal and an alloy; and a granular magnetic layer comprising ferromagnetic metal particles and a nonmagnetic oxide, wherein the magnetic recording medium has a surface resistivity of from 1 to 100 ?/?.

Abstract: A magnetic recording medium comprising; a nonmagnetic support; a first under layer which is constituted by a nonmetal element, per se, a compound consisting of nonmetal elements, or a compound containing titanium and a nonmetal element; a second under layer containing at least one element selected from the group consisting of chromium, titanium, iridium, platinum, palladium, ruthenium, rhodium, rhenium and osmium; and a magnetic layer which contains a ferromagnetic metal alloy containing at least cobalt, platinum and chromium, and a nonmagnetic compound, in this order.

Abstract: A process for producing a magnetic recording medium comprising: unrolling a flexible polymer substrate from a feed roll; forming a magnetic layer on at least one side of the flexible polymer substrate by a vacuum film forming method in a film forming chamber; and taking up the flexible polymer substrate on a take-up roll, wherein at least one of the feed roll and the take-up roll is replaced while maintaining a vacuum state for forming the magnetic layer in the film forming chamber.

Abstract: In an information recording method of the present invention by carrying out recording data while carrying out tracking servo accurately, high density recording of signals at a good S/N can be carried out, and high density recording by a vertical magnetic recording system can be carried out. A magnetic disk comprises a magnetic recording layer, and the magnetic recording layer is magnetized in advance such that magnetized regions A and B having different magnetization directions are formed. At a time of recording data, vertical magnetic recording is carried out by a magnetic head while carrying out accurate tracking servo by optically tracking by a magneto-optical effect utilizing a difference in the magnetization directions of the magnetized regions A and B. Therefore, high-density recording at a good S/N is possible.

Abstract: A method for manufacturing a magnetic recording medium, the method comprising forming a magnetic layer on at least one side of a flexible polymer support by a sputtering method, wherein the flexible polymer support contains at least one of polyethylene terephthalate, polyethylene naphthalate, polyamide and polyimide, the forming of a magnetic layer is carried out while carrying the flexible polymer support along a roll having a maximum surface roughness of from 0.01 to 0.4 ?m, and a deposition rate in the sputtering method for forming of a magnetic layer is from 0.5 to 17 nm/sec.

Abstract: A method for producing a magnetic recording medium comprising a flexible polymer support, a magnetic layer having a granular structure and a protective layer in this order, the method comprising: forming the magnetic layer on at least one side of the flexible polymer support; and forming the protective layer with use of at least one ion source while conveying the flexible polymer support having the magnetic layer on at least its one side along a roll having a maximum surface roughness is from 0.01 to 0.4 ?m.

Abstract: The present invention provides a magnetic recording medium such as a flexible disk which is capable of high-density recording and is excellent in magnetic property. The magnetic recording medium comprises a magnetic layer, including a cobalt-containing ferromagnetic alloy and a non-magnetic material, on at least one surface of a non-magnetic substrate, wherein the ferromagnetic alloy forms a columnar structure.

Abstract: A magnetic recording medium has a support provided with at least on one side of the support a magnetic layer having at least a granular structure, and a protective layer in this order, wherein the protective layer is a hard carbon film formed by an ion beam deposition process, and the protective layer has a ratio of a strength of G peak (IG) having a peak in a range of from 1,500 to 1,600 cm?1 in Raman spectrum according to Raman spectroanalysis and a strength of D peak (ID) having a peak in a range of from 1,350 to 1,430 cm?1, (ID/IG), of from 0.5 to 1.0.

Abstract: A magnetic recording medium comprising a substrate, an underlayer, an intermediate layer, and a magnetic layer in this order, the underlayer being made of Ru, the intermediate layer being made of an RuCo alloy, and the magnetic layer having a granular structure made up of a Co-containing ferromagnetic metal alloy and a non-magnetic oxide.

Abstract: A magnetic recording medium comprising a flexible support and a magnetic layer selected from a cobalt/palladium multilayer film and a cobalt/platinum multilayer film.

Abstract: A magnetic recording medium, which contains a chromium-containing primer layer and a magnetic layer at least on one surface of a nonmagnetic support member, the chromium-containing primer layer contains chromium and at least one type of element selected from a group of cobalt, beryllium, osmium, rhenium, titanium, zinc, tantalum, aluminum, molybdenum, tungsten, vanadium, iron, antimony, iridium, ruthenium, rhodium, platinum, palladium, silicon, and zirconium, and the magnetic layer contains a ferromagnetic metal alloy containing at least cobalt, platinum and chromium, and a nonmagnetic material.

Abstract: A magnetic recording medium comprising a flexible polymer support, a gas barrier layer, an under layer and a magnetic layer in this order, wherein the magnetic layer has a granular structure comprising a ferromagnetic metal alloy and a nonmagnetic oxide, and taking a residual magnetic flux density of the magnetic layer as Br and a thickness of the magnetic layer as ?, a relationship 10[G·?m]?Br·??60[G·?m] (0.001[T·?m]?Br·??0.006[T·?m]) is satisfied.

Abstract: A magnetic disc medium comprising a flexible polymer support and a magnetic layer containing a ferromagnetic metal, wherein a ten point average roughness of a surface of the flexible magnetic disc medium of a side having the magnetic layer measured with an atomic force microscope is from 15 to 40 nm, and a number of projections present at a height from a reference plane of 10 nm on the surface is from 0.1 to 10/&mgr;m2.

Abstract: A magnetic recording medium comprising: a nonmagnetic substrate; an under layer; and a magnetic layer in this order, wherein the magnetic layer has a granular structure comprising a ferromagnetic metal alloy and a nonmagnetic oxide, and a coercive force squareness ratio S* of the magnetic layer satisfies the following relational expression (1):

Abstract: A magnetic recording medium comprising, in this order: a flexible polymer support; a gas barrier layer; an under layer; and a magnetic layer, wherein the magnetic layer has a granular structure comprising a ferromagnetic metal alloy and a nonmagnetic oxide, and a total thickness of the under layer and the magnetic layer is from 10 to 45 nm.