Abstract: A magnetic recording medium includes a metal thin-film magnetic layer formed on a non-magnetic substrate. The metal thin-film magnetic layer is formed so that the coercivity measured when a magnetic field is applied with an angle of intersection of 120° between the plane of the non-magnetic substrate and magnetic field lines of the magnetic field and the coercivity measured when the magnetic field is applied with the angle of intersection of 60° are both at least 160 kA/m.

Abstract: A magnetic recording medium includes a first metal thin-film magnetic layer and a second metal thin-film magnetic layer, which respectively include a plurality of columns and have magnetization easy axes that are inclined in opposite directions, formed in that order on a non-magnetic substrate. Both metal thin-film magnetic layers include former growth portions that comprise base end parts of the respective columns and latter growth portions that comprise remaining parts of the respective columns on front-end sides of the columns. The former growth portions are formed by the columns growing in a thickness direction of the non-magnetic substrate. The latter growth portions are formed by the columns growing so as to become inclined to a length of the non-magnetic substrate and arc-shaped in profile.

Abstract: A thin-film forming method feeds out a belt-shaped web from a roll produced by winding the web and causes the web to run around a cooling drum while simultaneously forming a thin film on the web by vapor-phase deposition. A roll with a rebound hardness of no greater than 691L is used as the roll and a thin-film forming surface of a part of the web in contact with the cooling drum is irradiated with an electron beam.

Abstract: The present invention provides an apparatus and a method for producing a magnetic recording medium, which are free from base film breakage, capable of running a base film stably during a vapor deposition preparation stage and a vapor deposition step, and excellent in production efficiency.

Abstract: A method of vapor depositing a film is provided wherein the film is not thermally damaged or broken due to the effects of heat and electrification of the film during the heating of a vapor deposition material. The film can be moved and vapor-deposited stably, and a loss of the film can be decreased as compared to the conventional method. The method forms a thin film on a long film, comprising aromatic polyamide, in vacuum. During the heating of the vapor deposition material, the long film stands still or is moved at a very low speed of 1 m/min or less, wherein a shielding plate is placed between the vapor deposition material and the long film. Once the vapor deposition material is completely molten, a substantial movement of the long film is started. At the same time or thereafter, the shielding plate is removed.

Abstract: There is provided a method of vapor depositing a film such that the film is not thermally damaged or broken by avoiding effects of heat and electrification of the film accompanied by the heating for melting, when a vapor deposition material is molten in vapor deposition preparation steps of the film, and a loss of the film can be decreased as compared with the conventional method, whereby the film can be moved and vapor-deposited stably. The film vapor deposition method is for forming a thin film on a long film 2 comprising aromatic polyamide in vacuum. During a material to be vapor-deposited is molten, the long film 2 is stood by or moved at a very low speed of 1 m/min or less under the condition that a shielding plate 9 between the material to be vapor-deposited and the long film 2 is closed. Once the material to be vapor-deposited is completely molten, the base film 2 is started to be moved substantially. At the same time or thereafter, the shielding plate 9 is open.

Abstract: A method of producing a magnetic recording medium, and an apparatus thereof in which coercive force can be detected in an in-line mode, a metal thin film magnetic layer can be produced stably, and a vapor deposition film having a stable quality can be obtained. A method of producing a magnetic recording medium, comprising the steps of forming a metal thin film magnetic layer on a substrate, irradiating a light to a surface of the metal thin film magnetic layer, and measuring lightness of a reflected light from the surface to monitor coercive force of the metal thin film magnetic layer.

Abstract: A lubricant composition comprising (A) a compound of the formula: R1—COO—R2 wherein R1 is a higher aliphatic hydrocarbon residue and R2 is an aliphatic hydrocarbon residue which may contain fluorine atom(s) and/or oxygen atom(s), and (B) a compound of the formula: wherein R3 is a higher aliphatic hydrocarbon residue; R4 and R5 are independently a hydrogen atom or an aliphatic hydrocarbon residue which may contain fluorine atom(s) and/or oxygen atom(s), gives a lubricant layer in a magnetic recording medium having good running durability, still life and weather resistance.

Abstract: A magnetic recording (vapor deposition) film medium having improved friction characteristics, running durability, and still characteristics are provided.

Abstract: The present invention manifests a highly excellent effect of allowing the plasma polymerization film to be formed stably for a long time while very rarely suffering occurrence of abnormal discharge during the formation of the plasma polymerization film and promoting the improvement of the yield of products because it adopts as the electrode for implementing plasma polymerization that of the electrodes which is located on the side confronting a surface on which the plasma polymerization film is formed, coats this electrode with a polymer material at a covering ratio in the range of 50-100%, and effects the formation of the plasma polymerization film on an elongate substrate under the operating pressure in the range of 10.sup.-3 -1 Torr. Further, the properties of the plasma polymerization film also become highly excellent.

Abstract: A magnetic recording medium possessing excellent electromagnetic characteristics, corrosion resistance, durability, abrasion resistance and lubricity, has an undercoat layer, a ferromagnetic metal layer, a protective layer and a lubricating layer formed in this order on a non-magnetic substrate, or has an undercoat layer, a ferromagnetic metal layer, an intercepting layer, a protective layer and a lubricating layer formed in this order on a non-magnetic substrate, wherein the protective layer is a plasma-polymerized hydrogen-containing carbon film having a refractive index of 1.90 or more and a contact angle of less than 80 degrees, the film thickness of the protective layer or the total film thickness of the protective layer and the intercepting layer is 30 to 150 .ANG., the undercoat layer, as well as the intercepting layer, is a film formed of silicon oxide represented by SiOx (x=1.8-1.