Patent · US Expired

Optical recording medium

US4956216A · kind A · utility

5Cited by

2References

20Claims

0Family size

Assignee

Leybold GmBH · DE

Inventors

Alfons Hausler · Obertshausen, DE
Rainer Ludwig · Bitburg, DE
Michael Geibler · Bad Neuenahr-Ahrweiler, DE
Michael Jung · Frankfurt am Main, DE

Key dates

Filing date	Oct 24, 1988
Grant date	Sep 11, 1990
Priority date	—
Expiry date	Oct 24, 2008

Classification

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

Abstract

In an optical recording medium, for an audio-video or ROM compact disc comprising a pitted translucent base material and a layer (9) of a corrosion resistant metal or combination of metals from the groups 4N, 5N, 7N or 8N of the periodic table of elements is disclosed. For example NiCr can Be Applied onto the surface having the pits (7), thereby providing good adhesion, reflecting light and providing printable surface and not requiring any further coating such as a protective lacquer. Also, in the event that a gold-colored glossy layer is necessary, a CuBe layer can be sputtered onto the substrate (8).

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