Startseite   |  Site map   |  A-Z artikel   |  Artikel einreichen   |   Kontakt   |  
  


englisch artikel (Interpretation und charakterisierung)

Storing data on a dvd





DVDs are of the same diameter and thickness as CDs, and they are made using some of the same materials and manufacturing methods. Like a CD, the data on a DVD is encoded in the form of small pits and bumps in the track of the disc.
A DVD is composed of several layers of plastic, totalling about 1.2 millimetres thick. Each layer is created by injection moulding polycarbonate plastic. This process forms a disc that has microscopic bumps arranged as a single, continuous and extremely long spiral track of data.
Once the clear pieces of polycarbonate are formed, a thin reflective layer is sputtered onto the disc, covering the bumps. Aluminium is used behind the inner layers, but a semi-reflective gold layer is used for the outer layers, allowing the laser to focus through the outer and onto the inner layers. After all of the layers are made, each one is coated with lacquer, squeezed together and cured under infrared light. For single-sided discs, the label is printed onto the nonreadable side. Double-sided discs are printed only on the nonreadable area near the hole in the middle completed DVDs.

 
 



Datenschutz
Top Themen / Analyse
Arrow Frank Lloyd Wright report by alexander gruber and rudolf hainzl
Arrow Review of Nevil Shute's On the beach
Arrow Alkaline Pulping Processes
Arrow Social criticism in the comic series - Simsons
Arrow ANNA KARENINA: THE PLOT
Arrow NORDIRLAND
Arrow THE AENEID: DIDO
Arrow Australia - Aborigines
Arrow Chicagos Urban Problems
Arrow ENGLAND IM MITTELALTER




Datenschutz
Zum selben thema
icon Bush
icon New York
icon Beer
icon California
icon SUA
A-Z englisch artikel:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z #

Copyright © 2008 - : ARTIKEL32 | Alle rechte vorbehalten.
Vervielfältigung im Ganzen oder teilweise das Material auf dieser Website gegen das Urheberrecht und wird bestraft, nach dem Gesetz.
dsolution