WRITE-ONCE READ-MANY TYPE OPTICAL DISC CORRESPONDING TO COMPACT DISC OR COMPACT DISC-ROM

摘要

PURPOSE: To provide a constitution for a recording film material of a unite-once read-many type optical disc with excellent stability, good recording sensitivity and corresponding to CD or CD-ROM and a disc. ;CONSTITUTION: In a CD or CD-ROM corresponding write-once read-many type optical disc consisting of a four layers structure of a base sheet/a recording film/a reflective film layer/a protective layer, the recording film is constituted of a specified phthalocyanine coloring matter.;COPYRIGHT: (C)1994,JPO&Japio