Information recording medium having a wobbling groove structure

Details Information recording medium having a wobbling groove structure Information recording medium having a wobbling groove structure

2007-03-20

2007-03-20

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044130, C369S053230, C369S272100

Reexamination Certificate

active

11282618

ABSTRACT:
An information recording medium having at least a read only area and a recording and reproducing area is composed of at least: a substrate; a recording layer formed on the substrate so as to record and reproduce information; and a light transmission layer having transparency formed on the recording layer. The information recording medium is further characterized in that a wobbling groove corresponding to the read only area and another wobbling groove corresponding to the recording and reproducing area is formed on the substrate without overlapping with each other, the recording and light transmitting layers are continuously adhered over at least two areas of the read only area and the recording and reproducing area, reflectivity of the recording layer is more than 5%, and a push-pull signal output T3reproduced from the read only area and another push-pull signal output T4reproduced from the recording and reproducing area before recording satisfies relations of T3≧0.1, T4≧0.1 and 1.5≧T3/T4≧0.5.

REFERENCES:
patent: 5583847 (1996-12-01), Takeshima et al.
patent: 5689482 (1997-11-01), Iida
patent: 5696758 (1997-12-01), Yanagimachi et al.
patent: 5999504 (1999-12-01), Aoki
patent: 6411575 (2002-06-01), Akiyama et al.
patent: 6442119 (2002-08-01), Sunagawa
patent: 6580678 (2003-06-01), Kondo et al.
patent: 6654332 (2003-11-01), Coene
patent: 6665260 (2003-12-01), Kato et al.
patent: 6744725 (2004-06-01), Kondo
patent: 2002/0159382 (2002-10-01), Ohata et al.
patent: 2778405 (1998-05-01), None
patent: 10-302310 (1998-11-01), None
patent: 2001-229547 (2001-08-01), None

Affiliated with

Also associated with

Rating

Information recording medium having a wobbling groove structure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information recording medium having a wobbling groove structure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information recording medium having a wobbling groove structure will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3801610