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US 7,125,593 B2Granted
Optical recording medium
AssigneeTDK Corporation
InventorsTsuyoshi Komaki, Kenji Yamaga, Takashi Yamada
Life of this patent
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Abstract
An optical recording medium including a substrate and a light transmitting layer provided on the substrate so as to have a smaller thickness than that of the substrate, which is hardly warped and excellent in electrical characteristics and productivity, is provided. An optical recording medium includes: a substrate; and a light transmitting layer having a smaller thickness than that of the substrate. In this medium, a material of the substrate is a polyether imide resin.
Claims2
An optical recording medium comprising:
- a substrate having a disc-like shape with a thickness of about 1.1 mm, an outer diameter of about 120 mm, and an inner diameter of about 15 mm;
- and
- a light transmitting layer having a thickness of about 0.1 mm,
- wherein a material of the substrate is a polyether imide resin.
1 more element
Dependencies are inferred from the claim text.