Method for producing thin film coated magnetic disks and thin film magnetic disks thus obtained

The known process in which a base coating and on this the magnetic coating and finally a top coating are applied, have the disadvantage that the corrosion resistance is not adequate: there are defects. It is not inconceivable that it is possible for water to diffuse into the substrate. In accordance...

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Bibliographische Detailangaben
Hauptverfasser:	WINKLER, TORSTEN, JUNGHAEHNEL, MICHAEL, BLUETHNER, RALF, SCHNEIDER, HANS-HERMANN, MUELLER, MANFRED, BAUR, HEINZ, GOEDICKE, KLAUS, BUCHBERGER, HANS, LEHNERT, KARL-HEINZ
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL 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 PERFORMING OPERATIONS PHYSICS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION TRANSPORTING
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Beschreibung
Zusammenfassung:	The known process in which a base coating and on this the magnetic coating and finally a top coating are applied, have the disadvantage that the corrosion resistance is not adequate: there are defects. It is not inconceivable that it is possible for water to diffuse into the substrate. In accordance with the invention, a barrier layer is interposed between the substrate and the base coat by medium frequency pulsed sputtering at a frequency of 10 to 200 kHz and a pulse length to pulse pause ratio from 5:1 to 1:10. The invention finds application preferably for hard magnetic disks of high storage density.