发明名称 |
Disc type magnetic recording medium |
摘要 |
The present invention provides a disc magnetic recording medium which provides remarkable improvements in electromagnetic characteristics, particularly high density recording properties, and exhibits excellent magnetic properties with various sizes. A disc type magnetic recording medium is disclosed, comprising a substantially non-magnetic layer and a magnetic layer provided on a non-magnetic support in this order, said magnetic layer comprising a ferromagnetic metal fine powder or ferromagnetic hexagonal ferrite fine powder dispersed in a binder, wherein said non-magnetic support is an aramide or polyethylene naphthalate having a central plane average surface roughness SRa of not more than 10 mm and there is the following relationship between the thickness d ( mu m) of the non-magnetic support and the outermost diameter D (mm) of the recording area: <MATH> <MATH> <MATH> <IMAGE> |
申请公布号 |
EP0817176(A1) |
申请公布日期 |
1998.01.07 |
申请号 |
EP19970110806 |
申请日期 |
1997.07.01 |
申请人 |
FUJI PHOTO FILM CO., LTD. |
发明人 |
SAITO, SHINJI;NOGUCHI, HITOSHI;ENDO, YASUSHI |
分类号 |
G11B5/70;G11B5/73 |
主分类号 |
G11B5/70 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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