Dynamic information storage or retrieval – Storage medium structure – Optical track structure
Reexamination Certificate
2002-01-25
2010-10-12
Agustin, Peter Vincent (Department: 2627)
Dynamic information storage or retrieval
Storage medium structure
Optical track structure
Reexamination Certificate
active
07813257
ABSTRACT:
An optical recording medium allowing high-density recording, where a groove having a shallow U-shaped cross section wider than certain width, a master for manufacturing optical recording medium, a manufacturing apparatus thereof, and a manufacturing method thereof are provided. A exposure beam (61) and a exposure beam (62) are recombined together with a first exposure beam (60) in a second PBS (47) so that traveling directions thereof may be the same direction. At this time, the exposure beam (61) and the exposure beam (62) are arranged so that both optical axes may be aligned at certain distance. Thereby, a width of a spot formed by combining these beams can be extended, and light exposure of the spot can be proper to form a shallow groove, as typically showed in FIG.3.
REFERENCES:
patent: 4788421 (1988-11-01), Ogawa et al.
patent: 4893298 (1990-01-01), Pasman et al.
patent: 5040165 (1991-08-01), Taii et al.
patent: 5426632 (1995-06-01), Murakami et al.
patent: 5724339 (1998-03-01), Ogawa
patent: 6335916 (2002-01-01), Endo et al.
patent: 6487164 (2002-11-01), Endoh et al.
patent: 6731589 (2004-05-01), Sakamoto et al.
patent: 2001/0030937 (2001-10-01), Sakamoto et al.
patent: 0 414 429 (1991-02-01), None
patent: 63-149846 (1988-06-01), None
patent: 3-80443 (1991-04-01), None
patent: 4-178932 (1992-06-01), None
patent: 5-189813 (1993-07-01), None
patent: 05-314543 (1993-11-01), None
patent: 5-314543 (1993-11-01), None
patent: 06-103613 (1994-04-01), None
patent: 6-274895 (1994-09-01), None
patent: 7-73509 (1995-03-01), None
patent: 07-169114 (1995-07-01), None
patent: 08-045116 (1996-02-01), None
patent: 09-245350 (1997-09-01), None
patent: 11-353656 (1999-12-01), None
patent: 2000-90496 (2000-03-01), None
patent: 2000-99999 (2000-04-01), None
patent: 2000-132869 (2000-05-01), None
patent: 2000-260070 (2000-09-01), None
Machine translation of Kuroda et al., JP 07-073509.
Machine translation of Taira et al., JP 05-314543.
Endoh Sohmei
Konishi Ayumi
Agustin Peter Vincent
Oblon, Spivak McClelland, Maier & Neustadt, L.L.P.
Sony Corporation
LandOfFree
Optical recording medium and master disc for manufacturing... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optical recording medium and master disc for manufacturing..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical recording medium and master disc for manufacturing... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4205448