Optical disc with a rewritable area and a read-only area
US5923640A · kind A · utility
74Cited by
6References
18Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jun 26, 1997 |
| Grant date | Jul 13, 1999 |
| Priority date | — |
| Expiry date | Jun 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0079
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical disc having both rewritable area and read-only area is disclosed. The rewritable area has a single spiral pattern of start track land at a leading edge, and a single spiral pattern of end track land at a trailing edge, whereby portions of the physical address area PID deviated approximately Pa/2 from the track of the rewritable area are being intruded into the start track land and the end track land.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.