| 摘要 |
PURPOSE:To improve corrosion resistance at high humidity by sticking a corrosion inhibitor, consisting essentially of dihydric phenol, etc., to a ferromagnetic metallic thin film. CONSTITUTION:On a nonmagnetic substrate made of a polyester film, etc., a single-layer or multilayer ferromagnetic thin film which consists essentially of 0.05-0.5mum thickness Co, Fe and Co, Fe, Ni and Co, etc., of slanting or vertical columnar crystal, and also contains oxygen by 3-45 atomic percent of magnetic metal is formed under vacuum and in the presence of a small amount of oxygen gas by vapor deposition, sputtering, ion plating, etc., directly or with a nonmagnetic thin-film layer between, and corrosion inhibitors consisting essentially of dihydric phenol are used for it. As dihydric phenol, pure phenol, etc., of hydroquinone, and alkyl amino and a halogen substitute of them, e.g., 2-methyl hydroquinone, 4-methyl resorsinol, etc., are usable. Those inhibitors are allowed to exit in contact with at last the surface of the ferromagnetic thin film and, if possible, at the inside of or in contact with the interface of the base where the ferromagnetic thin film is formed. |
