Method of producing improved three-dimensional features in data recording structures
US6785221B2 · kind B2 · utility
4Cited by
32References
56Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 7, 2003 |
| Grant date | Aug 31, 2004 |
| Priority date | — |
| Expiry date | Mar 7, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/0903
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method to produce 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. The method includes dual and/or dithered beam writing onto the structure and improved composition of the active layer of the structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.