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US 8,147,729 B2Granted
Techniques for forming burst cutting area mark
AssigneeCinram International Inc.
InventorsJames J. Musto, James Myrtle
Life of this patent
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Abstract
A BCA mark is applied prior to molding of optical recording media. A stamper including a BCA code is formed. The stamper including the BCA code is used in the molding of optical recording discs. This technique can be used in manufacturing of read-only type discs, recordable discs, rewritable discs, hybrid discs, discs readable from both disc sides, discs having multiple information layers, high-density discs, etc.
Claims6
A method for applying data to a burst cutting area (BCA) prior to molding of optical recording media, said method comprising:
- forming a stamper including BCA data thereon;
- and
- using the stamper including the BCA data in the molding of optical recording discs to form optical recording discs including a BCA mark thereon,
- wherein the BCA data is applied by a laser to one of a father or a mother,
- where the stamper is formed using the mother, and the mother is formed using the father and the father is formed using a mastering substrate.
2 more elements
Dependencies are inferred from the claim text.