Abstract: According to one embodiment, a head suspension assembly includes a base plate including a first main surface and a through-hole penetrating the first main surface, a load beam including a base end portion fixed to the base plate and extending from the base plate, a wiring member provided on the first main surface of the base plate and the load beam, and a magnetic head placed on the wiring member. The base plate includes a partition recess formed on the first main surface and continuously or intermittently extending to partition the magnetic head and the through-hole.

Abstract: According to one embodiment, a magnetic recording medium includes a substrate, a magnetic recording layer on the substrate, and a first protective layer of carbon formed on the magnetic recording layer by thermal CVD.

Abstract: According to one embodiment, a magnetic head slider includes a slider body, a magnetic recording/reproducing element provided on the slider body, a thermally conductive first protective layer provided on at least a part of a total of air bearing surfaces of the slider body and the magnetic recording/reproducing element, having a thermal conductivity of 200 W/(m·K) or higher and a second protective layer provided on the first protective layer.

Abstract: A magnetic recording medium includes a substrate and a stacked film on the substrate and including a magnetic recording layer. An elastic modulus Esub of the substrate satisfies Equation (1) below, where h is a film thickness of the stacked film and Efilm is an Young's modulus of the stacked film: Esub?(200*Efilm)/(6*h)??(1).

Abstract: According to one embodiment, a method of evaluating a scratch mark includes, for a magnetic recording medium including a magnetic recording layer containing magnetic particles and a metal oxide grain boundary provided between the magnetic particles, detecting and evaluating a scratch mark based on information about the reflection intensity of light in a predetermined wavelength range. The predetermined wavelength range includes at least a second wavelength range from 600 nm to 700 nm and a first wavelength range from 300 nm to 500 nm.

Abstract: According to one embodiment, a magnetic recording medium is formed by performing gas ion irradiation by using a magnetism deactivating gas on a stack including a perpendicular magnetic recording layer, an Ru nonmagnetic underlayer containing a magnetism deactivating element selected from chromium, titanium, and silicon, and a nonmagnetic substrate. Before gas ion irradiation, the perpendicular magnetic recording layer contains platinum and at least one of iron and cobalt. Gas ion irradiation is performed using nitrogen gas alone or a gas mixture of nitrogen gas and at least one gas selected from the group consisting of helium, hydrogen, and B2H6.

Abstract: An object of the invention is to provide an anthracene derivative having characteristics peculiar to anthracene such as e.g., high carbon density, high melting point, high refractive index and fluorescent properties for ultraviolet rays, etc., and reaction diversity that results from the bisphenol structure, and a process for producing the same. Disclosed is an anthracene derivative represented by the following general formula (1): in the formula (1), X and Y each independently represent a hydroxyaryl group. The aforementioned X and Y are preferably a hydroxyphenyl group. In addition, the anthracene derivative can be produced by a process including allowing at least one compound selected from phenols and anthracene-9-carboaldehyde to react in the presence of an oxygen-containing inert organic solvent and an acid catalyst.

Abstract: According to one embodiment, letting (Rf) be main-chain portion C2F4O contained in a Fomblin lubricant and a compound containing a phosphazene ring and (R) be terminal group (CF3—C6H4—O—)5(NP)5—O—CH2CF2 contained in the compound containing a phosphazene ring in a magnetic recording medium, the ratio, which is measured using TOF-SIMS, of the component of (R) to the component of (Rf) on the surface of a lubricant layer is 0.01 to 0.09%.

Abstract: According to one embodiment, a perpendicular magnetic recording medium characterized by includes: a substrate; an undercoat layer formed on the substrate and made of a soft magnetic material; a recording layer formed on the undercoat layer and having an easy axis of magnetization in a direction that is approximately perpendicular to a surface of the perpendicular magnetic recording medium; and a protective layer which is formed on the recording layer and in which soft magnetic particles are mixed.

Abstract: According to one embodiment, a method of manufacturing a patterned medium includes forming an implantation depth-adjusting layer above a magnetic recording layer, the magnetic recording layer being made of a material that is deactivated when implanted with a chemical species, and the implantation depth-adjusting layer being made of a material that is etched when irradiated with an ion beam of the chemical species and irradiating the implantation depth-adjusting layer with the ion beam to implant the chemical species into a part of the magnetic recording layer through the implantation depth-adjusting layer while etching the implantation depth-adjusting layer by an action of the ion beam to decrease a thickness of the implantation depth-adjusting layer.

Abstract: According to one embodiment, a perpendicular magnetic recording medium characterized by includes: a substrate; an undercoat layer formed on the substrate and made of a soft magnetic material; a recording layer formed on the undercoat layer and having an easy axis of magnetization in a direction that is approximately perpendicular to a surface of the perpendicular magnetic recording medium; and a protective layer which is formed on the recording layer and in which soft magnetic particles are mixed.

Abstract: According to one embodiment, a magnetic recording medium includes a substrate, a magnetic recording layer formed on the substrate and containing a magnetic material, and a protective layer. The magnetic recording layer includes a recording portion having patterns regularly arranged in the longitudinal direction, and a non-recording portion having saturation magnetization lower than that in the recording portion. The non-recording portion contains the magnetic material, a deactivating species which makes the value of saturation magnetization smaller than that of saturation magnetization in the recording portion, and the component of the protective layer.

Abstract: According to one embodiment, a magnetic recording medium is formed by performing gas ion irradiation by using a magnetism deactivating gas on a stack including a perpendicular magnetic recording layer, an Ru nonmagnetic underlayer containing a magnetism deactivating element selected from chromium, titanium, and silicon, and a nonmagnetic substrate. Before gas ion irradiation, the perpendicular magnetic recording layer contains platinum and at least one of iron and cobalt. Gas ion irradiation is performed using nitrogen gas alone or a gas mixture of nitrogen gas and at least one gas selected from the group consisting of helium, hydrogen, and B2H6.

Abstract: An object of the invention is to provide an anthracene derivative having characteristics peculiar to anthracene such as e.g., high carbon density, high melting point, high refractive index and fluorescent properties for ultraviolet rays, etc., and reaction diversity that results from the bisphenol structure, and a process for producing the same. Disclosed is an anthracene derivative represented by the following general formula (1): in the formula (1), X and Y each independently represent a hydroxyaryl group. The aforementioned X and Y are preferably a hydroxyphenyl group. In addition, the anthracene derivative can be produced by a process including allowing at least one compound selected from phenols and anthracene-9-carboaldehyde to react in the presence of an oxygen-containing inert organic solvent and an acid catalyst.

Abstract: According to one embodiment, a method of manufacturing a patterned medium includes forming an implantation depth-adjusting layer above a magnetic recording layer, the magnetic recording layer being made of a material that is deactivated when implanted with a chemical species, and the implantation depth-adjusting layer being made of a material that is etched when irradiated with an ion beam of the chemical species and irradiating the implantation depth-adjusting layer with the ion beam to implant the chemical species into a part of the magnetic recording layer through the implantation depth-adjusting layer while etching the implantation depth-adjusting layer by an action of the ion beam to decrease a thickness of the implantation depth-adjusting laver.

Abstract: According to one embodiment, a magnetic recording medium includes two or more magnetic recording layers stacked on a nonmagnetic substrate, and a carbon-based protective layer formed on the two or more magnetic recording layers, in which an uppermost one of the two or more magnetic recording layers has hardness higher than that of a lower magnetic recording layer.

Abstract: According to one embodiment, a magnetic recording medium includes two or more magnetic recording layers stacked on a nonmagnetic substrate, and a carbon-based protective layer formed on the two or more magnetic recording layers, in which an uppermost one of the two or more magnetic recording layers has hardness higher than that of a lower magnetic recording layer.

Abstract: According to one embodiment, a patterned magnetic recording media has a magnetic recording layer and a protective layer formed on a substrate, in which the magnetic recording layer including a magnetic material patterned in tracks and a nonmagnetic material filled in between the tracks in a data area, and has a recessed portion formed in an area within 1 mm from an outer media end and extending to the media end. The recessed portion being formed 1 to 50 nm deeper than the data area.

Abstract: Solid material gasification method comprises a solution preparation step wherein a first solid material is dissolved in a solvent to prepare a gasification solution, a solvent removal step wherein a second solid material is separated by removing the solvent used to prepare the gasification solution from that solution, and a solid sublimation step wherein the second solid material is gasified by sublimation.

Abstract: According to one embodiment, a patterned magnetic recording media has a magnetic recording layer and a protective layer formed on a substrate, in which the magnetic recording layer including a magnetic material patterned in tracks and a nonmagnetic material filled in between the tracks in a data area, and has a recessed portion formed in an area within 1 mm from an outer media end and extending to the media end. The recessed portion being formed 1 to 50 nm deeper than the data area.