Corning is on the cutting edge of all things made out of glass, everything from eyeglasses, to astronomy optics, to fiber optics, all the way to 4 ton panes of nuclear shielded window glass (yeah that serious). One of the things they make for the consumer electronics industry is Gorilla Glass which is a chemically hardened glass made to flex beyond what normal glass would and fend off hard objects that would typically crack glass. Corning’s site mentions that this material is available in 0.5mm to 2mm and having looked at the S9 apart it appears to be the 0.5mm thickness. Having used the S9 first hand (S9 review) for quite some time I can vouch for its toughness and would love to see more device manufactures use this technology.
You can find more about Gorilla Glass on Corning’s site along with the Cowon S9 announcement. There is also a really cool video demo on that site showing off its ruggedness, but I have also embedded it below for you convenience. (thanks Olley)