发明授权
- 专利标题: Optical recording medium and process for producing the same
- 专利标题(中): 光记录介质及其制造方法
-
申请号: US10550069申请日: 2004-04-01
-
公开(公告)号: US07539121B2公开(公告)日: 2009-05-26
- 发明人: Morio Tomiyama , Shinya Abe , Yuuko Kawaguchi , Eiji Ohno
- 申请人: Morio Tomiyama , Shinya Abe , Yuuko Kawaguchi , Eiji Ohno
- 申请人地址: JP Osaka
- 专利权人: Panasonic Corporation
- 当前专利权人: Panasonic Corporation
- 当前专利权人地址: JP Osaka
- 代理机构: Wenderoth, Lind & Ponack, L.L.P.
- 优先权: JP2003-101160 20030404
- 国际申请: PCT/JP2004/004778 WO 20040401
- 国际公布: WO2004/090882 WO 20041021
- 主分类号: G11B7/24
- IPC分类号: G11B7/24
摘要:
An optical recording medium is provided with: a first substrate having first pits on one face thereof; a first reflective layer that is formed on the face bearing the first pits of the first substrate in a manner so as to reflect lands and recesses of the first pits; a second substrate that is formed on the first reflective layer, with second pits being formed on a face on the side opposite to the first reflective layer; a second reflective layer that is formed on the face bearing the second pits of the second substrate in a manner so as to reflect lands and recesses of the second pits; and a cover layer formed on the second reflective layer. In this structure, the first pit depth d1 that is a difference between lands and recesses of the first reflective layer, the wavelength λ of signal-reproducing laser light and the refractive index n1 of the second substrate satisfy the following relational expressions: λ/(5n1)≦d1≦λ/(3n1) and d1≠λ/(4n1). Moreover, the second pit depth d2, which is a difference between lands and recesses of the second reflective layer, the wavelength λ of signal-reproducing laser light and the refractive index n2 of the cover layer satisfy the following relational expressions: λ/(5n2)≦d2≦λ/(3n2) and d2≠λ/(4n2).
公开/授权文献
信息查询
IPC分类: