Optical disc and fabrication method thereof

Details Optical disc and fabrication method thereof Optical disc and fabrication method thereof

2005-08-30

2005-08-30

Cao, Allen (Department: 2652)

Dynamic optical information storage or retrieval

Optical storage medium structure

C369S283000

Reexamination Certificate

active

06938267

ABSTRACT:
On a replica substrate1a, a reflection layer11, a first dielectric layer12made of ZnS—SiO2, a recording layer13made of a phase change type recording material, and a second dielectric layer14made of ZnS—SiO2are successively formed. In addition, a reaction protection layer15made of Si3N4or SiO2is formed on the second dielectric layer14. As a result, an information signal portion1cis composed. A light transmissivity sheet is formed through an adhesive layer so that the light transmissivity sheet coats an information signal portion1c. As a result, a light transmission layer is composed. When the reaction protection layer15is not formed, a reaction protection resin layer made of an ultraviolet ray setting resin is formed so that the reaction protection resin layer coats the information signal portion1c.

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