The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 20, 2011
Filed:
Oct. 11, 2007
Joachim Knittel, Tuttlingen, DE;
Stephan Knappmann, Zimmern OB Rottweil, DE;
Joachim Knittel, Tuttlingen, DE;
Stephan Knappmann, Zimmern OB Rottweil, DE;
Thomson Licensing, Princeton, NJ (US);
Abstract
The optical storage medium comprises a substrate layer, a data layer with a mark/space structure arranged in tracks on the substrate layer, and a cover layer. One track comprises positive marks and a neighboring track comprises negative marks. The tracks are arranged in particular as spirals wherein one spiral contains a track with only positive marks and a neighboring spiral contains a track with only negative marks. The positive marks of a track and correspondingly the negative marks of a track are separated each by spaces. The optical storage medium is particularly a read-only optical disc and comprises a mask layer with a super resolution near field structure, wherein the tracks of the data layer are arranged as two spirals, one spiral consisting of positive marks only and the other spiral consisting of negative marks only. For the production of the optical storage medium, a stamper and production methods for a master for a stamper production are provided, comprising a surface with positive and negative marks, which correspond to the respective positive and negative marks of the data layer of the optical storage medium.