| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical disk capable of visually and easily determining contents recorded on a recording/reproducing medium, and to provide a recording/reproducing cartridge. SOLUTION: A display part 11 consisting of a reversible heat sensitive recording material is formed on a surface of a phase-changing optical disk. Al is deposited as a reflected layer on a laminated polycarbonate substrate 7 and, thereon, as a recording material, a material in which organic crystal fine particles consisting of a behenic acid (CH<SB>3</SB>(CH<SB>2</SB>)<SB>20</SB>COOH) are dispersed in a matrix polymer consisting of a copolymer of vinyl chloride and vinl acetate (-(CH<SB>2</SB>CHC<SB>1</SB>)<SB>x</SB>-(CH<SB>2</SB>CH-O-C(CH<SB>3</SB>)O)-) is used. A protective film is formed on the recording material. COPYRIGHT: (C)2004,JPO
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