Optical disc with corrosion-resistant metallic reflective layer

Optical disc with inhibited thermal distortion

Optical disk

Optical disk

Optical disk

Optical disk

Optical disk and recording/reproducing device

Optical disk employing integral substrate, and method for...

Optical disk having a hard coat layer

Optical disk having R/W and worm area

Optical disk substrate

Optical disk substrate

Optical disk substrate

Optical disk substrate and optical information-storage medium

Optical disk substrate, optical information-storage medium, and

Optical disk with vibration dampening

Optical element having durability enhancing layer

Optical information medium

Optical information medium

Optical information medium and its fabrication process