Two 100 μm cover layer techniques for high numerical aperture (NA) digital video recording system have been developed. For systems with NA of 0.85 at 650 nm wavelength, the cover layer thickness tolerances of ±3 μm within a single disc, up to radius 58.5 mm, are achievable at an average thickness near 100 μm, using the spin-coating of UV-curable resins, or the bonding of a 100 μm thick polycarbonate sheet. Disc tilt and cover layer birefringence comply with the physical requirements of the system.
|Number of pages||3|
|Journal||Proceedings of SPIE - The International Society for Optical Engineering|
|Publication status||Published - 1 Dec 1999|
|Event||1999 Joint International Symposium on Optical Memory and Optical Optical Data Storage (ISOM/ODS'99) - Koloa, HI, USA|
Duration: 12 Jul 1999 → 15 Jul 1999