| 摘要 |
PURPOSE:To form a thin chromium film to the extent of obviating the generation of a film crack, etc. and to obtain an excellent magnetic characteristic by forming the side where an underlying layer contacts with a substrate of a film consisting essentially of zirconium oxide, etc. and forming the side where said layer contacts with a magnetic layer of the chromium film. CONSTITUTION:The non-magnetic underlying layer 2 consisting of a ZrO2 layer, the 2nd underlying layer 3 consisting of the Cr film, a thin magnetic metallic layer 4 consisting of a Co-Ni film and a protective layer 5 consisting of a thin carbon film are successively formed on a non-magnetic soda lime glass substrate 1. The film consisting essentially of the zirconium oxide, etc. is formed between the non-magnetic substrate 1 and the chromium film 2 as the underlying layer and therefore the thickness of the chromium film is made as small as 1000 Angstrom at which the crack of the film, etc. are not generated. The excellent magnetic characteristic is thus obtd.
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