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US 6,332,944 B1Granted
Substrate design for bonded storage disks and method of making same
AssigneeSTEAG HamaTech AG
InventorsJoseph W. Paulus, Arthur R. LeBlanc, III
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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.
Claims13
A method of making a DVD comprising
- forming a DVD substrate having a moat with a capillary barrier shape that inhibits the capillary flow of liquids from flowing into and past the moat;
- arranging the DVD substrate with another substrate;
- placing resin between the DVD substrate and the other substrate;
- allowing the resin to distribute between the DVD substrate and the other substrate via capillary forces, wherein the radially inward flow is inhibited by said moat when said resin encounters said moat;
- and
- curing the resin.
3 more elements
Dependencies are inferred from the claim text.