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Dual-Layer Coatings Target Next-Generation Optical Discs

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Phillip Espinasse
Dr. Steven Kosier

With the emergence of the Blu-ray video recording format, end users can record, rewrite and play back at least two hours of digital HDTV or more than 13 hours of standard video on a single optical disc. Currently, however, Blu-ray systems are found only in the homes of HDTV enthusiasts. Costs must come down before the broad market will accept the format. One way for manufacturers to control costs is to incorporate as many functions onto as few CMOS or bipolar CMOS chips as possible. In CD/DVD systems, this is accomplished by integrating the photodiode that senses the data with the...Read full article

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    Published: December 2004
    Glossary
    optical disc
    A rigid medium, generally a polycarbonate substrate coated with a reflective aluminum layer, that stores information (such as audio, video or data) as digital bits in the form of variations in the reflective surface, and that modulates a laser beam to decode the stored data. Optical disc formats include read-only (ROM) and write-once/read-many (WORM); erasable discs include phase-change, magneto-optical and dye-polymer media.
    Accent on ApplicationsApplicationsBlu-ray video recording formatCoatingsdigital HDTVoptical discSensors & Detectors

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