Optical disc
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United States of America Patent
Stats
-
May 20, 1986
Grant Date -
N/A
app pub date -
Jun 26, 1984
filing date -
Oct 26, 1982
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention provides an optical disc comprising a resin disc (1), a metal film (2) formed on at least one surface of the resin disc (1), a protective film (3) highly adhesive to the metal formed on the resin disc (2), and a hard coating film (4) formed on the resin disc (1) and the protective film (3) and having a bridging density higher than that of the aforementioned protective film (3) and such a high surface hardness that it is not vulnerable even when the optical disc is roughly handled; the protective film (3) on the metal film (2) has the three effects of protecting the metal film (2), improving the corrosion prevention and, further, improving the cohesion to the hard coating film (4).
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