MAGNETIC DISK AND ITS PRODUCTION

• Main Authors: TADA JUNYA, KAWAMOTO ATSUSHI, YASUDA SHINICHI
• Format: Patent
• Language: English
• Published: 23.07.1993
• Subjects: CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; DIFFUSION TREATMENT OF METALLIC MATERIAL; INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; METALLURGY; PHYSICS; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION

PURPOSE:To provide the magnetic disk having magnetostatic characteristics sufficient for realizing a large storage capacity and to provide its production method. CONSTITUTION:This magnetic disk is formed by laminating a first layer substantially consisting of Cr and a second layer essentially consisting of Cr for a magnetic recording medium formed on the substrate. The face of the crystal forming the first layer is oriented substantially parallel to the substrate. The first layer of this magnetic disk is formed while an electric voltage is applied between the substrate and the chamber of a film forming device so as to apply negative potential to the substrate by 100 to 300V to the chamber.