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28 June 1999 Initialization process by induction heating for phase-change optical disks
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Phase change media have to be initialized prior to recording in order to satisfy the current standards for example CD-RW, PD and DVD-RAM. Initialization for phase change optical disks is the process of crystallization of as-deposited amorphous recording film by sputtering method. The Initialization process is basically similar to erasing process in phase change media by laser and current process adopts high power large beam laser for the heating the recording film in order to reduce the process time. But the process time of current initialization is quit long compared to the time required for other manufacturing process by one order. So the Induction Heating method is studied in order to reduce the process time resulting low production cost which is very important for commercializing phase change optical disks. Induction heating is well known process technology for metallurgical industry and others due to its effective indirect and focused heating performance. The induced current by external alternate magnetic field flow in the conductive material internally and develops Ohmic heat. By the internal heating, the surround materials are free from thermal damage which is inevitable in external heating.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Woon-Seong Yeo, Hyung-Kyu Kim, and Chang-Jong Kim "Initialization process by induction heating for phase-change optical disks", Proc. SPIE 3864, Joint International Symposium on Optical Memory and Optical Data Storage 1999, 386419 (28 June 1999);

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