WRITE-ONCE/READ-MANY TYPE OPTICAL RECORDING MEDIUM AND OPTICALLY RECORDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a write-once type optical recording medium capable of storing recorded information over a long term in a satisfactory state and an optically recording method using the write-once/read-many type optical recording medium.;SOLUTION: This write-once/read-many type optical recording medium 1 has a substrate 40, a protective layer 30 and a recording layer 10 disposed between the substrate 40 and the protective layer 30. A record mark 13 including an eutectic alloy is formed on the recording layer 10 by laser beams made incident from the side of the substrate 40 when recording is performed. The recording layer 10 has a reaction layer 11 that is made mainly of, for example, Si and a reaction layer 12 that is made mainly of Cu subjected to eutectic crystallization with Si when recording is performed and brought into contact with the reaction layer 11.;COPYRIGHT: (C)2003,JPO