Optical Storage Media – CD / DVD / BD –

Optical storage media are mainly devided into two different categories, prerecorded and recordable/rewritable media. Depending on the storage density, three generations of optical storage media are known:

CD (Compact Disc)	ca. 700 MB per layer, one layer
DVD (Digital Versatile Disc)	ca. 4,7 GB per layer, up to 4 layers
BD (Blu-Ray Disc)	ca. 25 GB per layer, up to 4 layers

All of these formats are produced by means of uv technology. The requirements of the uv curing process is such diverse as the physical properties of the different formats:

CD: spin coating of protective lacquer, no optical requirements, 4 – 10 µm
DVD: Bonding of two half discs, specifies optical properties, 20 – 50 µm
BD: Optical cover layer, hardcoating, high optical requirements, 97 – 103 µm (total thickness)

The requirements to the uv process light are enourmous, due to the use of thermoplast plastics and the high optical precision of the formats.

ssr engineering has a profound knowledge in uv curing of these high-tech products. It doesn´t matter if you have a prerecorded or recordable, CD-, DVD- or BD-application, ssr engineering is the right partner for new line equipment or retrofitting of existing production lines. Contact us, our applications engineering is at your service with active support.