Optical recording medium

Details Optical recording medium Optical recording medium

2011-04-12

2011-04-12

Neyzari, Ali (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

Reexamination Certificate

active

07924696

ABSTRACT:
An optical recording medium of a pitting recording type, to which recording marks are formed by irradiation with a violet laser beam having a wavelength λ in the range of about 380 to about 450 nm, includes a substrate having a surface provided with guide grooves and lands, and a metal recording layer in which recording marks are formed by irradiation with a laser beam. The guide grooves and the lands meet conditions expressed by:in-line-formulae description="In-line Formulae" end="lead"?λ/18≦DG≦λ/11  (1)in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?1.5≦WG/WL≦3.5  (2)in-line-formulae description="In-line Formulae" end="tail"?Where λ is the wavelength of the laser beam used for writing and reading, DG, is the depth of the grooves, WGis the width of the grooves, and WLis the width of lands formed on the substrate, and the wavelength λ is in the range of 380 to 450 nm.

REFERENCES:
patent: 5448551 (1995-09-01), Miyagawa et al.
patent: 5581539 (1996-12-01), Horie et al.
patent: 6018510 (2000-01-01), Abe et al.
patent: 7672215 (2010-03-01), Noda et al.
patent: 2004/0241376 (2004-12-01), Chen et al.
patent: 2007/0048488 (2007-03-01), Fujii et al.
patent: 2007/0248783 (2007-10-01), Kakiuchi et al.
patent: 7-85503 (1995-03-01), None
patent: 2002-225433 (2002-08-01), None
patent: 2007-230207 (2007-09-01), None
patent: 2007-301761 (2007-11-01), None
patent: 2007-334983 (2007-12-01), None
patent: 2008-41190 (2008-02-01), None
U.S. Appl. No. 12/376,484, filed Feb. 5, 2009, Fujii et al.
U.S. Appl. No. 12/090,569, filed Apr. 17, 2008, Hideo Fujii et al.
U.S. Appl. No. 12/160,312, filed Jul. 9, 2008, Tatewaki Ido et al.
U.S. Appl. No. 12/168,474, filed Jul. 7, 2008, Hideo Fujii et al.

Affiliated with

Also associated with

Rating

Optical recording medium 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, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical recording medium will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2636232