WORM TYPE OPTICAL DISK

摘要

An environment-friendly WORM type optical disk not using organic materials. The disk comprises a light transmitting substrate (11) made of biodegradable resin, an absorption buffer layer (13) provided on this substrate (11), and a recording layer (12) provided on the absorption buffer layer (13), wherein the substrate (11) in an area irradiated with light is deformed or deteriorated to form a recording part (55).