Optical data storage medium containing a triazacyanine dye as the light-absorbing compound in the information layer

US6641889B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Horst Berneth · Leverkusen, DE
• Friedrich-Karl Bruder · Krefeld, DE
• Wilfried Haese · Rheydt, DE
• Rainer Hagen · Leverkusen, DE
• Karin Hassenruck · Mülheim an der Ruhr, DE
• Serguei Kostromine · Rheinbach, DE
• Peter Landenberger
• Rafael Oser · Krefeld, DE
• Thomas Sommermann · Bensberg, DE
• Josef-Walter Stawitz · Cologne, DE
• Thomas Bieringer · Odenthal, DE

Key dates

• Filing date: Mar 20, 2002
• Grant date: Nov 4, 2003
• Expiry date: Apr 3, 2022

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/21
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

An optical data storage medium containing a preferably transparent substrate which has optionally already been coated with one or more reflecting layers and onto the surface of which a photorecordable information layer, optionally one or more reflecting layers, and optionally a protective layer or an additional substrate or a top layer are applied, which data storage medium can be recorded on and read using blue or red light, preferably laser light, wherein the information layer contains a light-absorbing compound and optionally a binder, characterized in that at least one triazacyanine dye is used as the light-absorbing compound.