发明授权
- 专利标题: Magnetic disk substrate
- 专利标题(中): 磁盘基板
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申请号: US4190申请日: 1993-01-13
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公开(公告)号: US5360677A公开(公告)日: 1994-11-01
- 发明人: Hideaki Fukai , Hiroyoshi Suenaga , Kuninori Minakawa , Shinichiro Otaka , Masahiko Naoe
- 申请人: Hideaki Fukai , Hiroyoshi Suenaga , Kuninori Minakawa , Shinichiro Otaka , Masahiko Naoe
- 申请人地址: JPX Tokyo
- 专利权人: NKK Corporation
- 当前专利权人: NKK Corporation
- 当前专利权人地址: JPX Tokyo
- 优先权: JPX1-44018 19890223
- 主分类号: G11B5/82
- IPC分类号: G11B5/82 ; C22C14/00 ; G11B5/73 ; G11B5/66
摘要:
A magnetic disk substrate having a composition wherein (V/13)+(Fe/20)+(Cr/17)+(Ni/31)+(Co/23) are no greater than 0.010%, Rem+Si+B+W are no greater than 0.015% (where Rem denotes rare earth metals), 0+2N+0.75C are no less than 0.03% and no greater than 0.5%, and the remainder consists substantially of Ti, all % being weight %.
公开/授权文献
- US6040238A Thermal annealing for preventing polycide void 公开/授权日:2000-03-21