Patent ID: 6596367
Filing Date: 2003-07-22
Classification: G11B,Y10T

Abstract:
An optical disc comprising a synthetic resin substrate provided with readable information, a moisture-proof layer and a second synthetic resin layer, said moisture-proof layer being situated between the synthetic resin substrate and the second synthetic resin layer, wherein the moisture-proof layer comprises a stack having more than one layer, and wherein the location of the moisture-proof layer in the optical disc is such that the following general formula applies:0.14wherein: Î¸=thickness&it;â€ƒ&it;of&it;â€ƒ&it;the&it;â€ƒ&it;second&it;â€ƒ&it;synthetic&it;â€ƒ&it;resin&it;â€ƒ&it;layer&it;â€ƒ&it;â€ƒ(mm)overall&it;â€ƒ&it;thickness&it;â€ƒ&it;of&it;â€ƒ&it;the&it;â€ƒ&it;optical&it;â€ƒ&it;disc&it;â€ƒ&it;(mm).