Magnetic recording media

US6231963A · kind A · utility

Assignee

• Emtec Magnetics GmbH · DE

Inventors

• August Lehner
• Helmut Jakusch · Bischofswerda, DE
• Volker Koch · Reckersdorf, DE
• Manfred Ohlinger · Bischofswerda, DE
• Albert Kohl · Laumersheim, DE
• Werner Lenz · Bad Dürkheim, DE
• Norbert Schneider · Schorndorf, DE
• Peter Heilmann · Bad Dürkheim, DE
• Werner Hubner · Bischofswerda, DE
• Erich Hoffmann · Heidelberg, DE
• Ronald J. Veitch · Frankenthal (Pfalz), DE
• Rudi Lehnert · Ludwigshafen, DE
• Harald Jachow · Worms, DE

Key dates

• Filing date: Mar 17, 1998
• Grant date: May 15, 2001
• Expiry date: Mar 17, 2018

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/257
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

Described are tape-type magnetic recording media (I) including a non-magnetic substrate (III), at least one film applied to the substrate and, in at least one of these films, an inorganic acicular pigment (II) suitable for use as a supporting pigment, the ratio of the mean length to the mean diameter of the pigment (II) being at least 3 and the mean modulus of elasticity of the films being not less than 15 GPa in the longitudinal direction of the tape-type recording medium (I).