CD's, DVD's are usually made from a thin piece of optically clear plastic with a layer on top of some type of silvered metal, with additives to cause it to discolor when exposed to laser light.
The DVD format was developed by a consortium consisting of Philips, Sony, Toshiba and Time Warner in 1995. The first production discs were manufactured by Toshiba in 1996.
The plastic is made of a transparent polymer plastic such as polycarbonate. There is a thin, partially transparent film in the center made of plastic mixed with photosensitive chemicals such as...
The first step in manufacturing a DVD-R or DVD+R disc is to fabricate the polycarbonate plastic substrates (incorporating the spiral groove and land pre-pits) using an injection molding process. The...