Process of making a magnetic recording medium

US4128672A · kind A · utility

Assignee

• BASF SE

Inventors

• Gerd Wunsch · Speyer, DE
• Paul Deigner · Bad Dürkheim, DE
• Roland Falk · Achern, DE
• Karl Mahler · Kehl, DE
• Werner Loeser · Ludwigshafen, DE
• Friedrich Domas · Altlußheim, DE
• Peter Felleisen · Lampertheim, DE
• Werner Steck · Ludwigshafen, DE

Key dates

• Filing date: Oct 24, 1975
• Grant date: Dec 5, 1978
• Expiry date: Oct 24, 1995

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01F41/14
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

A process for the manufacture of rigid magnetic recording media by depositing a cobalt-containing ferromagnetic metal layer on a non-magnetic metallic base disc provided with a cured layer of binder which does not dissolve or swell in organic solvents and contains non-magnetic pigments, and which has been activated, before deposition of the ferromagnetic layer, by treatment with a solution of a palladium (O) complex in an organic solvent, followed by decomposition of this complex, to prepare it to receive the ferromagnetic metal layer which is produced by electroless deposition.