Blu-ray discs are made of Makrolon polycarbonate
Some things just don’t change. The optical disc recording has advanced from CD to DVD and now to Blu-ray but the physical foundation of the disc remains the same. Since 1982 the discs have been made of polycarbonate, and they will be in the future too. But is it necessarily a good thing, as we have seen that CDs are DVDs are easy to scratch, and scratches often cause issues with the playback and readability of the disc. With Blu-ray and HD-DVD the data density is much higher, but the vulnerable body of the disc remains the same.
Optical data storage (ODS) is moving on to the next generation, and for its market launch, the principal manufacturers have again decided in favor of Makrolon®, the polycarbonate from Bayer MaterialScience AG. As successors to the familiar DVD formats, Blu-ray-Discs and High-Density-DVDs (HD-DVDs) operate with blue laser light and can each store up from 15 to more than 100 gigabytes, depending on the number of used information layers. This quantum leap in storage capacity resulted from the need to store an entire feature film on one disc, in the new so called High-Definition (HD) resolution.
Source: Azom.com
