Patent ID: 6596363
Filing Date: 2003-07-22
Classification: G11B,Y10T

Abstract:
An optical information medium to be optically recorded and/or read, whereinsaid medium comprises a coating on at least one surface of the medium of a film of a silane coupling agent containing a water- or oil-repellent substituent, said silane coupling agent being represented by the following formula (1): R1â€”Si(X)(Y)(Z)â€ƒâ€ƒ(1) â€ƒwherein R1 is the water- or oil-repellent substituent; X, Y and Z are independently a monovalent group; and at least one of X, Y and Z is a group which is capable of forming Siâ€”Oâ€”Si bond by polycondensation with silanol group; and said medium has an underlying layer formed in contact with said silane coupling agent film, and at least the surface of said underlying layer comprises a compound having a chemical bond represented by the formula (2): Mâ€”Aâ€ƒâ€ƒ(2) â€ƒwherein M is a metal atom (including a semimetal), and A is a chalcogen atom selected from O, S, Se, and Te, nitrogen atom, or carbon atom, wherein said underlying layer comprises a polydimethyl siloxane or an alkoxy silane coated on a resin or comprises a thermoplastic resin or an active energy beam-curable resin containing particles of a compound having a chemical bond represented by the formula (2).