Patent · US Expired

Magnetic recording media

US4891114A · kind A · utility

2Cited by

11References

1Claims

0Family size

Assignee

BASF SE

Inventors

Michael Hitzfeld · Karlsruhe, DE
Werner Grau · Frankenthal (Pfalz), DE
Joachim Hack · Ludwigshafen, DE

Key dates

Filing date	Dec 18, 1987
Grant date	Jan 2, 1990
Priority date	—
Expiry date	Dec 18, 2007

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S428/90
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

Magnetic recording media consist of a flexible disk-shaped nonmagnetic base, a cobalt/chromium layer applied thereto and suitable for vertical recording, and a friction-reducing layer of amorphous carbon present on this alloy layer.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.