Optical recording medium and its manufacturing method

Details Optical recording medium and its manufacturing method Optical recording medium and its manufacturing method

2008-04-01

2008-04-01

Cao, Allen (Department: 2627)

Dynamic optical information storage or retrieval

Optical storage medium structure

Reexamination Certificate

active

07353528

ABSTRACT:
A multi-layered film made of sequentially stacked first dielectric layer, recording layer, record-assist layer, second dielectric layer and first reflection layer on a disc substrate having a concavo-convex structure at least on one surface thereof. An ultraviolet-setting resin layer is formed to cover the multi-layered film. The record-assist layer is controlled in thickness to satisfy the relation d/4<a<3d, or more preferably the relation d/2≦a≦2d, between the thickness d of the recording layer and the thicknessaof the record-assist layer. The stacking order of the multi-layered film may be opposite. In this case, a light-transmitting sheet is provided to cover the multi-layered film via a bonding layer.

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