发明名称 |
OPTISCHES INFORMATIONSAUFZEICHNUNGSMEDIUM |
摘要 |
<p>An optical information recording medium for recording and reproducing information by irradiation with a laser beam having a wavelength lambda of 450 nm or less includes a substrate 14 and a plurality of information layers formed on the substrate. A first information layer 8 closest to an incident side of the laser beam among the plurality of information layers includes a recording layer 4, a reflection layer 6 and a transmittance adjusting layer 7. <??>A transmittance Tc1 (%) of the first information layer 8 at the wavelength lambda in a case of the recording layer 4 in a crystal phase and a transmittance Ta1 (%) of the first information layer 8 at the wavelength lambda in a case of the recording layer 4 in an amorphous phase satisfy 46 < Tc1 and 46 < Ta1. <??>Furthermore, a refractive index n1 and an extinction coefficient k1 of the transmittance adjusting layer 7 at the wavelength lambda , and a refractive index n2 and an extinction coefficient k2 of the reflection layer 6 at the wavelength lambda satisfy 1.5≤(n1 - n2) and 1.5≤(k2 - k1). <IMAGE></p> |
申请公布号 |
DE60229405(D1) |
申请公布日期 |
2008.11.27 |
申请号 |
DE2002629405 |
申请日期 |
2002.03.07 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO. LTD. |
发明人 |
NISHIHARA, TAKASHI;KOJIMA, RIE;YAMADA, NOBORU |
分类号 |
B41M5/26;G11B7/004;G11B7/2403;G11B7/24038;G11B7/24067;G11B7/243;G11B7/253;G11B7/2534;G11B7/254;G11B7/2542;G11B7/257;G11B7/258;G11B7/2585;G11B7/259;G11B7/2595 |
主分类号 |
B41M5/26 |
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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