发明名称 |
Optical disc having substrates with a specified thickness/diameter ratio and an adhesive layer with a specified Young's modulus range and mechanical dissipation factor range |
摘要 |
An optical disc is constructed by joining a pair of resin substrates through an adhesive layer so that information carrying means is disposed inside. The resin substrate has a diameter-to-thickness ratio d/t>/=180. The adhesive layer has a Young's modulus of 0.1-1 kgf/mm2 at 20 DEG C. and a mechanical dissipation factor (tan delta ) of 0.6-5.0 at 20 DEG C. The adhesive layer is formed of a hot melt adhesive, pressure-sensitive adhesive, room temperature curable adhesive or ultraviolet curable adhesive. The disc is resistant to both heat and vibration.
|
申请公布号 |
US5936934(A) |
申请公布日期 |
1999.08.10 |
申请号 |
US19970917225 |
申请日期 |
1997.08.25 |
申请人 |
TDK CORPORATION |
发明人 |
KURIBAYASHI, ISAMU;HIRATA, HIDEKI;ITOGA, AKIRA |
分类号 |
G11B7/24;G11B7/253;G11B7/257;(IPC1-7):G11B7/24 |
主分类号 |
G11B7/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|