Stock material or miscellaneous articles – Circular sheet or circular blank
Patent
1998-10-14
2000-02-01
Ahmad, Nasser
Stock material or miscellaneous articles
Circular sheet or circular blank
425810, 428 665, 428 666, 428 667, B32B 300
Patent
active
060200421
ABSTRACT:
An improved substrate and stamper holder and method of forming substrates are disclosed. According to a preferred embodiment of the invention, a substrate for a DVD has a moat with a capillary barrier shape. Under one embodiment, the moat has a region with an abrupt outer diameter transition. One embodiment has the outer diameter transition at approximately at a right angle relative to a registering surface of the substrate. Another embodiment of the invention provides a wider moats. The improvements reduce the likelihood of resin wicking past the moats.
REFERENCES:
patent: 5476700 (1995-12-01), Asai
patent: 5718960 (1998-02-01), Asai
LeBlanc, III Arthur R.
Paulus Joseph W.
Ahmad Nasser
First Light Technology Inc.
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