Optical disc

Details Optical disc Optical disc

2006-03-14

2006-03-14

Mulvaney, Elizabeth (Department: 1774)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C430S270130, C156S272200

Reexamination Certificate

active

07011878

ABSTRACT:
An optical disc has a support base and at least one information-retrieval layer formed over the support base. The information-retrieval layer is transparent and thinner than the support base. The information-retrieval layer exhibits variation in birefringence within ±20 nmpp (nano meter peak to peak) under double-pass measurements during one rotation of the optical disc.

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patent: 2001-388723 (2001-09-01), None

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