Stamper and optical disk with specific dimensions, surface roughness, and a land and a groove provided in a non-signal recording area
US7154843B2 · kind B2 · utility
4Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2002 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Feb 12, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0938
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A stamper and optical disk. A photoresist is applied to a substrate and this photoresist is exposed, developed and then transferred to form a disk master which has a recess/protrusion pattern formed on its one side. The one side of the disk master is etched to narrow the width of a protruding part constituting the recess/protrusion pattern, and the recess/protrusion pattern of the disk master with the reduced width of the protruding part is transferred to form a stamper. The recess/protrusion pattern provided on the stamper is transferred to form a predetermined pattern on a substrate of an optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.