Method for mirror polishing of ti-made magnetic disk substrate
US5136819A · kind A · utility
9Cited by
2References
3Claims
0Family size
Inventors
Key dates
| Filing date | Feb 1, 1991 |
| Grant date | Aug 11, 1992 |
| Priority date | — |
| Expiry date | Feb 1, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B37/042
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
According to a mirror surface polishing process of the present invention, it is possible to produce Ti-made magnetic disc substrate which have the excellent flatness degree and surface roughness in that the average roughness is not more than 0.05 .mu.m and the flatness degree of the outer periphery is not more than 0.15 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.