发明名称 |
Crystallized glass for information recording medium, crystallized glass substrate, and information recording medium using the crystallized glass |
摘要 |
Enclosed are crystallized glasses suitable for a substrate for an information recording medium such as a magnetic disc, optical disc, or optomagnetic disc, a substrate for information recording medium using such a crystallized glass substrate, and an information recording medium using such a substrate for information recording medium. The crystallized glasses are capable of providing a glass substrate having a high Young's modulus, as well as excellent mechanical strength, surface flatness, and heat resistance and having an excellent surface smoothness upon polishing. Glass substrate having an excellent surface smoothness using such a crystallized glass are also disclosed. |
申请公布号 |
EP1577275(A3) |
申请公布日期 |
2005.12.14 |
申请号 |
EP20050013441 |
申请日期 |
1999.03.12 |
申请人 |
HOYA CORPORATION |
发明人 |
XUELU, ZOU;KOUJI, AZEGAMI |
分类号 |
C03C10/00;C03C10/04;C03C10/08;C03C10/14;C03C19/00;G11B5/73 |
主分类号 |
C03C10/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|