发明名称 |
Disk type information recording medium |
摘要 |
A disk-shaped information recording medium is provided in such a manner that at least one information bearing layer formed on a side of a pair of disk-shaped substrates, which substrates are arranged so that the information bearing layers face each other with a hollow space between them by means of inner and outer spacers being concentrically interposed between the two substrates. A polyurethane adhesive layer is formed between the substrate and the spacer to combine said pair of substrates together via the inner and outer spacers.
|
申请公布号 |
US4791044(A) |
申请公布日期 |
1988.12.13 |
申请号 |
US19870097324 |
申请日期 |
1987.09.11 |
申请人 |
PIONEER ELECTRONIC CORPORATION |
发明人 |
YOSHINO, TOSHIKAZU |
分类号 |
G11B7/24;G11B7/244;G11B7/247;(IPC1-7):G01D15/14 |
主分类号 |
G11B7/24 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|