MAGNETIC RECORDING MEDIUM

PURPOSE:To obtain a high-density magnetic recording medium suitable for recordng at short wavelengths by controlling the surface roughness of a magnetic layer under specified conditions when the layer is formed by coating a magnetic coating material contg. ferromagnetic metallic powder dispersed in...

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Bibliographische Detailangaben
Hauptverfasser:	YAMAKAWA YOSHISUKE, WATANABE AKIO, TOKUOKA YASUMICHI
Format:	Patent
Sprache:	eng
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS CORRECTING FLUIDS DYES FILLING PASTES INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER INKS METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS NATURAL RESINS PAINTS PASTES OR SOLIDS FOR COLOURING OR PRINTING PHYSICS POLISHES USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	PURPOSE:To obtain a high-density magnetic recording medium suitable for recordng at short wavelengths by controlling the surface roughness of a magnetic layer under specified conditions when the layer is formed by coating a magnetic coating material contg. ferromagnetic metallic powder dispersed in a binder on a plastic base film. CONSTITUTION:When a coated magnetic film contg. ferromagnetic metallic powder is formed on a base film to obtain a magnetic recording medium, the surface roughness of the magnetic film is regulated so that roughness Rrms (mum) to wave-form having 3-50mum wavelength P among a group of wave-forms constituting the cross-sectional wave-form of the surface of the film satisfies an equation Rrms