Dvd is a kind of optical disc that can be used to store data, including myimpan video file with better quality than VCD.
DVD creation process:
DVD creation process:
Optical disc made of polycarbonate base
like this is the form of polycarbonate
after dried polycarbonate pellets inserted into the heater, granulated melted to a liquid first.
This is a DVD disc printer engine, in which there is a stamper
that his name could also be called a stamper or matrix, this metal plate containing the movie data data to be printed in the form of discs.
polycarbonate granules which are melted with a temperature of 250 degrees Celsius, is injected directly into the printer engine, to form a DVD disc, data is data that is in direct stamper also stored on the disc.
every single time printing process, producing 30 pieces of DVD, then the finished DVD disc will be brought to the next process using a conveyor.
Then the discs inserted into the space cooling, disc DVD-only cooled temperatures reaching 20-25 degrees Celsius (room temperature).
Then one side of the disc covered by a special coating (metallization process) for one side glossy / reflective, the laser sensor is intended for the DVD player can read the data contained in the DVD, without the shiny, not a laser sensor will be able to read data.
Then the part that is not shiny anymore glued a layer DVD on it with glue, you should know, DVD is composed of two layers, while the CD was only one layer.
still exist the next process
DVD discs are tested quality, can be seen, which tested 40 disks, 39 disks are very good quality, bad quality one disk. This factory for a month can produce 300,000 DVDs.
Sumber :
- www.ilmukomputer.org
