Patent ID: 7981494
Filing Date: 2011-07-19
Classification: G11B,Y10T

Abstract:
1. A method of manufacturing a write-once optical information recording medium, comprising: providing a disc-shaped substrate having a spiral or ring-shaped guiding groove disposed on a surface thereon; forming a light reflective layer on the surface of the substrate having the guiding groove; forming an optical recording layer made of an organic dye material on the light reflective layer, wherein the optical recording layer has a refractive index n in the range of about 1.2 to about 2.1 and an extinction coefficient k in the range of about 0.01 to about 0.7, and n+k is in the range of about 1.4 to about 2.1, said organic dye material being selected using as a criteria a push-pull amplitude V forming a protective layer on the optical recording layer; and bonding a cover layer to the protective layer.