2.5 INCH FLAT-TYPE PHASE-CHANGE OPTICAL DISK-DRIVE

Downsizing of personal information processing devices such as notebook computers has been progressing rapidly, hence a media exchangeable pe rsonal memory device with a large storage capacity is needed. We propo se a 2.5 inch flat-type, phase-change optical disk drive of 15 mm in h eight. In order to decrease the drive height we have designed and deve loped a 0.6 mm polycarbonate substrate, phase-change optical disk medi um, and a 6 mm high flat-type optical head. Overwriting on the 2.5 inc h phase-change medium was performed using the prototype disk drive.