Optical information recording medium and manufacturing method thereof
AssigneeTaiyo Yuden Co., Ltd.
InventorsFumi Hara, Takeshi Otsu, Isao Matsuda, Shingo Katoh, Masashi Satoh
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Abstract
An optical information recording medium has at least an optical reflective layer, an optical recording layer, an protective layer, and an optical transparency layer formed in that order on the main surface of a disc-shaped substrate. An area in which the protective layer is formed is made wider than an area in which the reflective layer is formed, and made narrower than an area in which the optical transparency layer is formed.
Claims10
An optical information recording medium comprising at least an optical reflective layer, an optical recording layer, a protective layer, and, an optical transparency layer, which are layered in this order on a main surface of a substrate, wherein:
- the protective layer is constituted by an inorganic material, and an area in which the protective layer is formed is wider than an area in which the optical reflective layer is formed, and covers an outer circumferential end of the optical reflective layer, as viewed above the substrate.
Dependencies are inferred from the claim text.