DE4137427

A storage disc 9 comprises a recording medium 8 which is covered on both sides by a lacquer coat 1 and 7. The lacquer coats are cured with the aid of ultra-violet radiation. The recording medium 8 comprises a substrate 2 which is coated with a four-layer structure. This four-layer structure comprise...

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Bibliographische Detailangaben
Hauptverfasser:	BREKNER, MICHAEL-JOACHIM DR., 6000 FRANKFURT, DE, WEBER, CHRISTOPH., 6072 DREIEICH, DE, HELLSTERN, EGON., 6273 WALDEMS, DE
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY COMPOSITIONS BASED THEREON INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER LAYERED PRODUCTS LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT ORNON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVINGCARBON-TO-CARBON UNSATURATED BONDS METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS PHYSICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING
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Beschreibung
Zusammenfassung:	A storage disc 9 comprises a recording medium 8 which is covered on both sides by a lacquer coat 1 and 7. The lacquer coats are cured with the aid of ultra-violet radiation. The recording medium 8 comprises a substrate 2 which is coated with a four-layer structure. This four-layer structure comprises a first dielectric layer 3, a magneto-optical recording layer 4, a second dielectric recording layer 5 and a reflection layer 6. The material for the substrate 2 is a polymer of polycyclic olefins prepared by polymerisation without ring opening. These so-called COC grades are random copolymers, made, for example, from norbornene and ethylene. As substrate material, it is also possible to copolymerise norbornene derivatives with various 1-olefins, and alloys of various COC grades are also suitable.