Polishing of the rear surface of a stamper for optical disk reproduction
US5209027A · kind A · utility
40Cited by
2References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 10, 1992 |
| Grant date | May 11, 1993 |
| Priority date | — |
| Expiry date | Jan 10, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24B21/06
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The rear surface of a stamper for use in the manufacture of optical disks should be polished to precision. A length of abrasive tape is fed across the stamper in pressure contact with the rear surface of the stamper through a pressure roller having a rubber sleeve with a hardness of up to 80 degrees as measured according to ASTM D 2240 type A while the stamper is rotating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.