Hybrid discs

Details Hybrid discs Hybrid discs

2006-05-30

2006-05-30

Psitos, Aristotelis M. (Department: 2653)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275300

Reexamination Certificate

active

07054260

ABSTRACT:
A hybrid disc whose recordable-band grooves are wider and shallower than the pre-recorded ROM data pits. The ROM pits may be pre-recorded in ROM grooves that are at least as wide, but shallower than, the ROM pits. The ROM lands intervene between consecutive ROM pits, whether or not a ROM groove is provided. In the preferred embodiment, one beam of a dual beam apparatus records the ROM pits, while the other beam records the pre-grooves, and also records the ROM groove, if present. In most embodiments a thermal mastering process provides smooth feature surfaces to facilitate replication of the hybrid disc masters. The berms normally forming at the radial extremities of the pits and grooves in the masters, by thermal expulsion processes, may be reduced or eliminated by methods taught.

REFERENCES:
patent: 5150339 (1992-09-01), Ueda et al.
patent: 5204852 (1993-04-01), Nakagawa et al.
patent: 5316814 (1994-05-01), Sawada et al.
patent: 5499229 (1996-03-01), Murakami et al.
patent: 5508995 (1996-04-01), Moriya et al.
patent: 5696758 (1997-12-01), Yanagimachi et al.
patent: 5724339 (1998-03-01), Ogawa
patent: 5850382 (1998-12-01), Koishi et al.
patent: 5933410 (1999-08-01), Nakane et al.
patent: 6031808 (2000-02-01), Ueno
patent: 6075761 (2000-06-01), Akiyama et al.
patent: 6212158 (2001-04-01), Ha et al.
patent: 6223247 (2001-04-01), Otsuka et al.
patent: 6226257 (2001-05-01), Morimoto
patent: 6285638 (2001-09-01), Konishi et al.
patent: 6459661 (2002-10-01), Iwanaga
patent: 6510129 (2003-01-01), Hirokane et al.
patent: 6570840 (2003-05-01), Wilkinson et al.
patent: 6673411 (2004-01-01), Koide et al.
patent: 2001/0005357 (2001-06-01), Ha et al.
patent: 2003/0007447 (2003-01-01), Yeh et al.
patent: 3081695 (1993-06-01), None
patent: WO96/30907 (1996-10-01), None
patent: WO 02/37486 (2002-05-01), None

Affiliated with

Also associated with

Rating

Hybrid discs does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Hybrid discs, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hybrid discs will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3562239