Record carrier in disk form having cover layers
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United States of America Patent
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Feb 12, 1980
Grant Date -
N/A
app pub date -
Jul 20, 1978
filing date -
Dec 12, 1977
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention relates to a disk-shaped record carrier, for example a video plate, which is provided on one side or on both sides with a radiation-reflecting surface structure in the form of an information track consisting of blocks and pits on which a reflecting layer of metal is provided. The plate can be read optically. According to the invention the reflecting metal layer is provided with a cover layer which is formed by a transparent plate which is connected to the metal surface by means of a radiation-curable lacquer. The lacquer is preferably a U.V. curing lacquer and contains a protic mixture of acrylic acid esters. The transparent plate is also preferably manufactured from a transparent synthetic resin and has a thickness of 200 .mu.m.
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