发明名称 |
Multilayered optical information-recording media and process for manufacture thereof |
摘要 |
This invention provides an optical disk effective in both precision and productivity, and to a process for the manufacture thereof. The optical disk allows reading of the information recorded on each information-recording surface of the two or more information-recording surfaces by varying the focal position of a playback laser beam incident on and passing through said light transmitting substrate; and the optical disk is provided with a transparent layer that is laminated onto the light transmitting substrate and is constituted of a thermoplastic resin sheet of uniform thickness and the transparent layer has an information-recording surface other than the surface of said light transmitting substrate formed thereon. |
申请公布号 |
US6973021(B2) |
申请公布日期 |
2005.12.06 |
申请号 |
US20030664509 |
申请日期 |
2003.09.16 |
申请人 |
JVC VICTOR CO. OF JAPAN |
发明人 |
KONDO TETSUYA;NISHIZAWA AKIRA |
分类号 |
G11B7/24;G11B7/257;G11B7/26;(IPC1-7):G11B7/24 |
主分类号 |
G11B7/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|