发明名称 |
Information recording medium and process for the preparation of the same |
摘要 |
<p>The information recording medium comprises a substrate provided with a prepit area and a pregroove area, a dye layer on the substrate and a reflecting layer on the dye layer, wherein the dye layer is a continuous layer formed on both the prepit area and the pregroove area, and the prepit area has a high modulation degree not less than 50 %. Its embodiments are as follows: A medium in which a difference between an optical thickness of the dye layer on the bottom portion of a pregroove or a prepit and that of the dye layer on the land portion or a portion between prepits is not more than lambda /8; one in which a prepit has a half width of 0.2 to 1.4 mu m and a depth of 150 to 400 nm, the pregroove has a half width of 0.2 to 1.4 mu m and a depth of 70 to 200 nm, the depth of the prepit is larger than the depth of the pregroove by not less than lambda /8; and one in which wherein a relationship between a depth of a prepit and a thickness of said dye layer on the prepit and that between a depth of a pregroove and a thickness of a dye layer on the pregroove satisfies the specific conditions; and one in which least one of the prepit area and the pregroove area may be present in two or more places.are disclosed. <IMAGE></p> |
申请公布号 |
EP0467716(B1) |
申请公布日期 |
1996.10.30 |
申请号 |
EP19910306621 |
申请日期 |
1991.07.19 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
USAMI, YOSHIHISA;SAWANO, MITSURU;MIYOSHI, TAKAHITO |
分类号 |
G11B7/007;G11B7/013;G11B7/24079;G11B7/24085;G11B7/244;G11B7/2472;G11B7/249;G11B7/253;G11B7/2534;G11B7/26;(IPC1-7):G11B7/013;G11B7/24 |
主分类号 |
G11B7/007 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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