Digital versatile discs

Cargill Dow has some commercial applications in Europe and Asia. A major market has been blister packaging used to wrap such products as Sony Walkman radios and digital versatile discs (DVDs). 

The storage and retrieval of data by optical means, which involves the interaction of some medium with a compact laser, focused to sub-micron size, is dominated by direct bit storage onto disc media. The various types of storage media, from read only compact discs (CD-ROM) to rewritable digital versatile discs (DVD-RW), and the favoured recording materials are shown in Figure 4.5. ... 

Pick-up lenses for digital versatile disc (DVD) players, recorder and super audio compact disc players,... 

Heat. As mentioned above most molecules lose energy from the excited state as heat. The most efficient molecules for converting electromagnetic radiation into heat are those that absorb in the near-IR region, i.e., infrared absorbers (IRAs). There has been much interest in IRAs because of their use in laser thermal transfer, optical data storage [the older write-once read-many (WORM) and the newer compact disc recordable (CD-R) and digital versatile disc recordable (DVD-R) systems], computer-to-plate printing, and as solar screens for car windscreens and windows. 

DOS DTA DVD density of states differential thermal analysis digital versatile disc... 

DVD ROM Digital versatile disc read only memory. 

The digital video disc or digital versatile disc (DVD), introduced in the mid 1990s, allows the storage of a complete movie, in compressed form. A single... 

Digital Versatile Disc (DVD) Optical storage disk that can hold fi-om 4.7 to 8.7 gigabytes of data. 

Fukuyama, Y. Yasuda, N. Kim, J. Murayama, H. Tanaka, Y. Kimura, S. Kato, K. Kohara, S. Moritomo, Y. Matsunaga, T. Kojima, R. Yamada, N. Tanaka, H. Ohshima, T. Takata, M. (2008a). Time-Resolved Investigation of Nanosecond Crystal Growth in Rapid-Phase-Change Materials Correlation with the Recording Speed of Digital Versatile Disc Media. Applied Physics Express, Vol.l, No.4, (March 2008), pp. 045001-1-3, ISSN 1882-0778... 

DV design value DV devolatilization DVD Digital Versatile Disc DVR dimensional velocity research DVR design value resource DVR Dominick Vincent Rosato DVR Donald Vincent Rosato DVR Drew Vincent Rosato DVR Druckverformungsrest (compression set/German)... 

Chalcogenide alloys such as GeSbTe-based compounds are of interest for applications in rewritable optical media (Digital Versatile Disc, Blu-ray disc) and in non-volatile electronic memory devices [1-5]. Both applications rest on a fast and reversible transformation between the crystalline and amorphous phases which represent the two states of the memory. The phase change is induced by heating, either... 

Phase change materials based on chalcogenide alloys are of widespread use in rewritable optical media (Digital Versatile Disc, Blu-ray disc) because of the strong optical contrast between the amorphous and crystalline phase (see inset of Fig. 15.9). Such a strong optical contrast is rather unusual since in typical semiconductors (e.g. GaAs in [91]) the amorphous and the crystalline phases have a similar... 

The high optical damage threshold, low dielectric constants, hi photosensitivity, and low cost of photorefractive polymers make them more efficient than inorganic materials (129). Optical data storage in PMMA-based photorefractive polymers has been demonstrated as a cheap and compact way improve data stoi age on compact discs and digital versatile discs (103). Polysiloxane-based photorefractive polymers have demonstrated the highest optical clarity and lowest optical scattering to date (105). 

Protection against harmful UV rays, humidity, scratch and corrosion is extremeiy cmcial in industries and thus, protective coatings have always been used for the same purpose. The bulk of the application has been found in protecting hard discs, digital versatile discs (DVD) and compact discs (CD). Development of small components has resulted in the reduction of the thickness of the protective layers as well. The mostly used polymer layer for the protection purpose is made of polycarbonate. The spin coating process has been mostly applied because of its low cost and relatively less residual error [10]. 

Chang D, Yoon D, Ro M, Hwang 1, Park 1, Shin D (2003) Synthesis and characteristics of protective coating on thin cover layer for high density-digital versatile disc. Jpn J Appl Phys 42(2S) 754... 

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