发明授权
- 专利标题: Method of manufacturing titanium magnetic disk substrate
- 专利标题(中): 制造钛磁性基片的方法
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申请号: US662272申请日: 1991-02-28
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公开(公告)号: US5131995A公开(公告)日: 1992-07-21
- 发明人: Hiroyoshi Suenaga , Hideaki Fukai , Toshio Sakiyama , Kuninori Minakawa
- 申请人: Hiroyoshi Suenaga , Hideaki Fukai , Toshio Sakiyama , Kuninori Minakawa
- 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: JPX2-56450 19900309
- 主分类号: C23C14/02
- IPC分类号: C23C14/02 ; B29D17/00 ; C23C14/06 ; C23C14/08 ; C23C14/14 ; G11B5/66 ; G11B5/73 ; G11B5/738 ; G11B5/82 ; G11B5/84
摘要:
After the surface roughness of a titanium substrate is set to be R.sub.max .ltoreq.0.08 .mu.m, a hardened layer having a hardness of H.sub.v .gtoreq.250 is formed thereon to have a thickness of 50 to 250 .mu.m by sputtering, thereby manufacturing a titanium magnetic disk substrate.