Bonded optical disk with internal abutting structure to control spacing of bonded halves and thickness of bond layer
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United States of America Patent
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Jun 20, 2000
Grant Date -
N/A
app pub date -
Sep 24, 1997
filing date -
Mar 31, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a bonded optical disk comprising two base disks which are bonded together by UV-setting adhesive, one or two of the base disks are provided with a projection located inside the adhesive application starting position in order to maintain the distance between bonded surfaces of the base disks at a predetermined thickness for the adhesive layer. A mold for molding above base disks is also provided. The thickness of the UV-setting adhesive is easily held at a predetermined thickness by the projection located inside the starting position. Therefore steady mass production of bonded optical disks with uniform adhesive layer thickness is made possible with easier management of the adhesive layer thickness.
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