- A BD-ROM is a sandwich of multiple layers of materials and
either one or two data layers . A single-layer (SL) disc begins with the
substrate (polycarbonate) molded with a spiral track of pits and lands
extending from the inside to the outside diameter of the disc. Added to
this substrate are a reflective layer (aluminum or silver alloy), a
cover layer (polycarbonate film, silicone and others) and finally a
transparent protective hard coating (silicon dioxide resin, silicone and
others)
- The Blu-ray Disc Association announced the finalization
and release of the specifications for the new multi-layer recordable
Blu-ray Disc format
- With the completion and approval of the specification, manufacturers
can now obtain licensing information and license applications needed to
begin production of the high capacity write-once and rewritable discs
and hardware.
- Targeted primarily at commercial segments such as broadcasting,
medical and document imaging enterprises with significant archiving
needs, provides customers with triple layer (rewritable) and
R (write-once) discs and quadruple layer discs.
- Possible consumer applications include capture and playback of HD
broadcast and satellite programming in markets where set-top recorders
are prevalent.
- USD 12 millions was needed to set up the first factory in the USA to
produce one Lakh discs per day
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About Optical Discs
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