Patent · US Expired

Reversible optical recording medium of the phase charge type

US5270149A · kind A · utility

8Cited by

5References

9Claims

0Family size

Assignee

BASF SE

Inventors

Stefan Iselborn · Bischofswerda, DE
Gerd Fischer · Hannover, DE
Hartmut Hibst · Schriesheim, DE

Key dates

Filing date	Jan 6, 1993
Grant date	Dec 14, 1993
Priority date	—
Expiry date	Jan 6, 2013

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10S430/165
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

The optical recording medium comprises at least one substrate and at least one storage layer of the phase change type with at least three reversibly interswitchable states of differing optical behavior, the difference in reflectivity between at least one pair of states being greater than between the amorphous and the crystalline state.

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