Patent · US Expired

Optical recording medium

US5118549A · kind A · utility

1Cited by

5References

16Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Alfons Hausler · Obertshausen, DE
Rainer Ludwig · Bitburg, DE
Michael Geisler · Apolda, DE
Michael Jung · Frankfurt am Main, DE

Key dates

Filing date	Jul 17, 1990
Grant date	Jun 2, 1992
Priority date	—
Expiry date	Jul 17, 2010

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/31678
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

An optical recording medium for an audio-video or ROM compact disc comprises a pitted translucent base material and a layer of a corrosion resistant metal or combination of metals from the group consisting of tantalum, chromium, cobalt, and nickel. For example, TaNi or CrCo can be applied to the surface, providing good adhesion, reflecting light, providing a printable surface, and not requiring any further coating such as a protective lacquer.

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