Apparatus for uninterrupted multi-layer disc manufacturing
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Feb 17, 2004
Grant Date -
N/A
app pub date -
Oct 31, 2000
filing date -
Oct 31, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention is an improved method and apparatus for replicating various types of optical discs such as CDs and DVDs. The apparatus includes a support plate attached to a rotatable shaft. The support plate has a top surface for supporting a stamper, ultraviolet ('UV') curable resin, and a support substrate. The UV curable resin forming the information layer on the support substrate of the optical disc. In the method, the stamper is placed on top of the support plate, and UV curable resin is applied to the top of the stamper having information containing data pits formed therein. The support substrate is placed on top of the stamper with the UV curable resin sandwiched in-between. The apparatus is rotated to spread the resin onto both surfaces of the support substrate and stamper. The joined surfaces of the support substrate and stamper are exposed to UV radiation. The newly formed optical disc is removed from the apparatus and comprises a support substrate and an information layer, with the information layer containing data pits precisely replicated from the data pits of the stamper.
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