Method for manufacturing an optical disk
US6379864B1 · kind B1 · utility
31Cited by
13References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1997 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jan 14, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10582
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disk including concentric or spiral grooves, a first series of pits formed in the interrupted portions, and a second series of pits formed in portions of lands. Both of the first and second series of pits represent address information. The portions of the lands and the interrupted portions of the grooves are located in different radial directions. With this arrangement, even when the optical disk has a reduced track pitch, accurate address information is obtained, achieving a high-density recording optical disk.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.