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30 November 1999 Quality discrimination method for write-once optical disk
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The conventional inspection methods for the write-once optical disk are consist of visual method with non-destructive and recording/playback of the sampled disks with destructive. So the quality can not be assured when arrived at the customer due to lack of quality inspection. We find the new method consist of recording/playback for each disk manufactured. The recording/playback is performed at the edge area of the disk where tracks are extended. This area is not conflict with the standard and the disk can be used as a virgin disk at the customer. From the experiment, we find that the ratio of bad disks can be reduced to 0.5% from 7% with proposed method.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Hyung-Kyu Kim, Woon-Seong Yeo, and Dongseok Bae "Quality discrimination method for write-once optical disk", Proc. SPIE 3806, Recent Advances in Metrology, Characterization, and Standards for Optical Digital Data Disks, (30 November 1999);

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