Method of manufacturing a glass substrate for a magnetic disk and method of manufacturing a magnetic disk
US9186771B2 · kind B2 · utility
3Cited by
6References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 30, 2012 |
| Grant date | Nov 17, 2015 |
| Priority date | — |
| Expiry date | Aug 24, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/8404
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
In a magnetic disk glass substrate manufacturing method, a main surface of a glass substrate is polished using a polishing liquid containing colloidal silica abrasive particles as polishing abrasive particles and a surface plate with a polishing pad, then the glass substrate is brought into contact with a liquid containing a coagulant so that the colloidal silica abrasive particles are coagulated, and then the colloidal silica abrasive particles coagulated are removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.