发明授权
US5131995A Method of manufacturing titanium magnetic disk substrate 失效
制造钛磁性基片的方法

Method of manufacturing titanium magnetic disk substrate
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.
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