Configuration of three-dimensional features in data recording structures
US7190661B2 · kind B2 · utility
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31References
14Claims
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Key dates
| Filing date | Mar 11, 2005 |
| Grant date | Mar 13, 2007 |
| Priority date | — |
| Expiry date | Mar 11, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Improvements in the shape of three-dimensional features displayed in optical recording structures, particularly in such structures displaying features of differing dimensional characteristics. The shape improvements include reductions in berm height and width, dual level data marks and tracking guides, and land areas projecting above or into the surface of the recording structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.