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:
Jun. 19, 2007
Filed:
Oct. 21, 2004
Kun Ho Ahn, Seoul, KR;
Keum Cheol Kwak, Seoul, KR;
Jin Hong Kim, Seoul, KR;
LG Electronics Inc., Seoul, KR;
Abstract
Disclosed is a super resolution optical disc. The super resolution optical disc comprises at least two mask layers. In one embodiment, the super resolution optical mask comprises a plurality of mask layers and impact absorption layers between the mask layers, and may further comprise diffusing prevention layers between the mask layer and the impact absorption layer. In another embodiment, the super resolution optical mask comprises a plurality of recording layers and dielectric layers separating the recording layers, each of the recording layers including two mask layers and an impact absorption layer between the mask layers or including two mask layers, an impact absorption layer between the mask layers, and diffusion preventing layers between the mask layer and the impact absorption layer. Accordingly, recording marks have an enhanced shape at an outer periphery of the marks, thereby enhancing the quality of the reproduction signal and enabling high-density multi-level recording.