Optical disk structure, method of manufacturing the same, and apparatus for manufacturing the same
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United States of America Patent
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-
Feb 1, 2000
Issued Date -
N/A
app pub date -
Sep 30, 1997
filing date -
Mar 16, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Indication members provided around a central hole in a disk does not adversely affect reference surfaces to be clamped, and clear, stable indication is maintained. For this purpose, first and second optical disks having annular light transmissive disk substrates with a common central hole, one surface of each of which light transmissive disk substrates is provided with a reflection film, are attached to each other as one body with an adhesive layer interposed therebetween, such that the reflection films opposed each other, thereby forming a compound optical disk. Label members are provided from the reflection film side by printing or attachment on flat portions surrounding the central hole.
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