Composite optical disk with structure for preventing adhesive from leaking into the center hole
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United States of America Patent
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Sep 21, 1999
Grant Date -
N/A
app pub date -
Jul 26, 1996
filing date -
Jul 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A composite optical disk structure includes a first transparent disk plate having a first center hole, a first stamper clamp groove and a first information recording area on its one main surface; a second transparent disk plate having a second center hole having a diameter equal to that of the first center hole, a second stamper clamp groove and a second information recording area on its one main surface; a transparent adhesive sandwiched between the first and second transparent disk plates to bond the one main surfaces of them; and a mechanism formed between the one main surfaces for preventing the transparent adhesive from leaking our into the center holes.
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