Abstract: An aspect of the present invention relates to a magnetic recording medium, which comprises a magnetic layer comprising ferromagnetic powder and binder on a nonmagnetic support, wherein the magnetic layer further comprises a compound which has a weight average molecular weight of equal to or more than 1,000 but less than 20,000 and is denoted by formula (1): wherein, in formula (1), A denotes a monovalent substituent, R1 denotes a single bond or a divalent connecting group, and m denotes an integer ranging from 2 to 4, multiple instances of A and R1 that are present can be identical or different, at least one of the multiple instances of A that are present denotes a monovalent polymer group and X denotes a heterocyclic group of valence m.

Abstract: According to one embodiment, there is provided a pattern formation method including forming a target layer to be processed on a substrate, adding a second dispersion containing a polymer material including a polymer chain having a base metal at a terminal end and a second solvent to a first dispersion containing noble-metal microparticles and a first solvent, thereby preparing a noble-metal microparticle layer coating solution in which microparticles covered with the polymer material are dispersed, arranging the noble-metal microparticles covered with the polymer material on the target layer by using the noble-metal microparticle layer coating solution, and transferring a projections pattern of the noble-metal microparticles covered with the polymer material to the target layer.

Abstract: A data storage device including a substrate; a magnetic structure deposited on the substrate; and a molecular overcoat deposited on the magnetic structure, the molecular overcoat having a thickness of not greater than about 100 ?.

Abstract: A lubricant according to one embodiment includes a first ingredient and a second ingredient, said first ingredient as the main constituent being a first perfluoropolyether compound represented by the formula (1) which has a weight-average molecular weight of 500 to 6000 and a dispersity smaller than 1.

Abstract: An apparatus includes a substrate, a recording layer on the substrate, and a nanocomposite layer on the recording layer, the nanocomposite layer including a wear-resistant material and a solid lubricant material, wherein the atomic percentage of the solid lubricant material in the nanocomposite layer is in a range from about 5% to about 99%. A method of making the apparatus is also provided.

Abstract: Embodiments of the present invention provide a magnetic disk having a lubricating layer formed on the surface thereof, which meets all the requirements for adhesiveness, adequate flowability, and strong binding power. In a particular embodiment, a magnetic disk has a magnetic layer, a protective layer, and a lubricating layer which are formed on a non-magnetic substrate, which is characterized in that said lubricating layer is comprised of a lubricant containing a first ingredient and a second ingredient, said first ingredient as the main constituent being a first perfluoropolyether compound represented by the formula (1) below, which has a weight-average molecular weight of 500 to 6000 and a dispersity smaller than 1.

Abstract: A flexible sheet with high magnetic permeability is disclosed, including a magnetic ferrite sintering sheet including a plurality of pieces separated by micro gaps and a first flexible layer attached to a first side of the magnetic ferrite sintering sheet, wherein the pieces of the magnetic ferrite sintering sheet include a first protruding and recessing structure and a second protruding and recessing structure at opposite sides of one of the micro gaps, and the first protruding and recessing structure and the second protruding and recessing structure are matched with each other.

Abstract: A method of manufacturing for providing closer head-to-media spacing, and the resulting disk, includes evenly lubricating a magnetic media disk, increasing the viscosity of a selected non-data zone region of the disk, and removing at least a portion of the lower viscosity region of the lubrication layer in a data zone region of the disk, thereby decreasing the thickness of the lubrication layer in the data zone portion of the lower viscosity region, producing a magnetic media disk capable of closer head-to-media spacing in the data zone portion of the lower viscosity region of the lubrication layer than in the non-data zone portion.

Abstract: Aliphatic polyesters may be substituted at the alpha- and beta-positions. These aliphatic polyesters may have increased thermal, chemical and hydrolytic stability compared to conventional aliphatic polyesters. In addition, these aliphatic polyesters may be used as high performance lubricants, including lubricants for hard disk drives.

Abstract: An organic-pigment aqueous dispersion, containing a pigment at a concentration of 6 to 30 mass %, and having a haze of 0.3 to 10%, as determined by enclosing the dispersion in a transparent glass cell of optical distance 0.2 mm and analyzing with integrating-sphere photoelectric photometry; and a colored coating composition using the same.

Abstract: A perpendicular magnetic recording medium is disclosed that is characterized by a lowered noise component and improved thermal stability. The method for making the recording medium includes the serial steps of forming a soft magnetic back-lining layer on a non-magnetic substrate, forming an intermediate layer on the soft magnetic back-lining layer, forming a magnetic recording layer on the intermediate layer, and forming a protective film and then a liquid lubricating layer on the magnetic recording layer. Thermal treatment is executed after the formation of the magnetic recording layer and before the formation of the protective film, or after the formation of the protective film and before the formation of the liquid lubricating layer. The thermal-processing steps are is executed in a vacuum higher than about 0.1 Pa and in a thermal environment within a range from about 200° C. to about 250° C. for a period of less than about 60 seconds.

Abstract: The present invention provides a lubricant capable of holding an excellent lubricating property under various types of service conditions, maintaining a lubricating effect for a long period of time and providing excellent traveling property, abrasion resistance, durability and the like, a recording medium using the lubricant and a carboxylic acid type compound constituting the lubricant.

Abstract: An information medium which is capable of maintaining the protection capability by a lubricant for a long term. An information medium has a recording area and a non-recording area disposed on at least one surface of a disk-shaped base plate. The information medium is configured such that a lubricant exists on the one surface of the disk-shaped base plate. The recording area is configured such that a protective film formed of DLC exists above the recording layer. At least a surface-side portion of the non-recording area is formed of a resin material having a higher bonding ratio with respect to the lubricant than that of DLC.

Abstract: A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a compound selected from the group consisting of hydrocarbyl-substituted cyclopentanes, hydrocarbyl-substituted cyclopentenes, hydrocarbyl-substituted cyclopentadienes, and mixtures or derivatives thereof. The lubricant layer also may be used on a magnetic head for reading and writing information on a magnetic recording medium. The magnetic recording medium and the magnetic head may be used to manufacture computer disk drives, compact disk drives, audio equipment, and video equipment.

Abstract: A magnetic recording medium and method for forming the magnetic recording medium are described. The magnetic recording medium includes a magnetic layer formed on a non-magnetic support, and a lubricant layer over the magnetic layer. The lubricant layer includes a compound selected from hydrocarbyl-substituted cyclopentanes, hydrocarbyl-substituted cyclopentenes, hydrocarbyl-substituted cyclopentadienes, and mixtures or derivatives thereof and, optionally, one or more additives. The lubricant layer also may be used on a magnetic head for reading and writing information on a magnetic recording medium. The magnetic recording medium and the magnetic head may be used to manufacture computer disk drives, compact disk drives, audio equipment, and video equipment.

Abstract: A magnetic disk is produced with improved yield by forming a DLC protective film by a d.c. magnetron sputtering process conducted in a sputtering atmosphere containing oxygen. The magnetic disk carries a lubricating film on the DLC film wherein a fluorocarbon resin constituting the lubricating film contains photocrosslinking groups. A lubricating film having non-polar end groups is also disclosed.

Abstract: To provide a lubricant for recording medium, which is advantageous not only in that it maintains excellent lubricity under various conditions for use and excellent lubricating effect over a long time, but also in that it can impart excellent transport properties and excellent abrasion resistance as well as excellent durability. For example, when C18H37—CH(CH2COOC10H6OH)COORf (wherein Rf represents a saturated or unsaturated partially-fluorinated-alkyl group) is used as a lubricant for magnetic recording medium, there can be obtained a magnetic recording medium having excellent transport properties and excellent abrasion resistance as well as excellent durability.