摘要 |
An optical disc substrate (2) includes an annular substrate and a protruding portion. The annular substrate has an inner supporting portion and an outer recording portion having a recording surface. The protruding portion overlaying the supporting portion has a plurality of indentations (221) on its outer periphery, wherein the lapped thickness of the protruding portion over the supporting portion is greater than the thickness of the recording portion. An optical disc, wherein a paint layer for recording data is coated on the recording surface of the disc substrate, is also disclosed.
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