EP 1103047 A1 20010530 - PRE-ENGRAVED SUBSTRATE FOR MAGNETIC, MAGNETO-OPTICAL OR PHASE TRANSITION OPTICAL DISC, FUNCTIONING BY FIRST SURFACE RECORDING IN THE LANDS, MANUFACTURING METHOD AND RESULTING DISC
Title (en)
PRE-ENGRAVED SUBSTRATE FOR MAGNETIC, MAGNETO-OPTICAL OR PHASE TRANSITION OPTICAL DISC, FUNCTIONING BY FIRST SURFACE RECORDING IN THE LANDS, MANUFACTURING METHOD AND RESULTING DISC
Title (de)
VORGRAVIERTES SUBSTRAT FÜR MAGNETISCHE PLATTEN, MAGNETO-OPTISCHE PLATTEN UND OPTISCHE PLATTEN MIT PHASENWECHSEL ZUR AUFZEICHNUNG AUF DIE STEGE DER ERSTEN OBERFLÄCHE, HERSTELLUNGSVERFAHREN UND DERARTIG HERGESTELLTE PLATTEN
Title (fr)
SUBSTRAT PREGRAVE POUR DISQUE MAGNETIQUE, MAGNETO-OPTIQUE OU OPTIQUE A TRANSITION DE PHASE, FONCTIONNANT PAR ENREGISTREMENT EN PREMIERE SURFACE DANS LES LANDS, SON PROCEDE DE FABRICATION ET DISQUE OBTENU
Publication
Application
Priority
FR 9801745 W 19980805
Abstract (en)
[origin: WO0008643A1] The invention concerns a pre-engraved substrate for a memory disc recordable by magnetic, magneto-optical or phase transition constraint, its manufacturing method and the resulting disc. Said pre-engraved substrate comprises a support (1) having at its surface a surface film (2) in a reflecting material and enabling to obtain a surface with optical polish and at least a recordable film (4), the surface film (2) and the film (4) comprising a succession of microgrooves and/or pits (7) representing a pre-formatting signal, the walls (8) of said pits and/or microgrooves (7) being formed in each of films (2) and (4) of the material constituting said film. The invention is useful for making magnetic, magneto-optical and phase transition optical discs, used particularly in the field of computers.
IPC 1-7
IPC 8 full level
G11B 5/00 (2006.01); G11B 7/007 (2006.01); G11B 7/26 (2006.01); G11B 7/09 (2006.01); G11B 11/105 (2006.01)
CPC (source: EP US)
G11B 5/00 (2013.01 - EP US); G11B 7/261 (2013.01 - EP US); G11B 7/00745 (2013.01 - EP US); G11B 7/0938 (2013.01 - EP US); G11B 11/10578 (2013.01 - EP US); Y10S 428/90 (2013.01 - EP US)
Citation (search report)
See references of WO 0008643A1
Designated contracting state (EPC)
CH DE FR GB LI NL SE
DOCDB simple family (publication)
WO 0008643 A1 20000217; EP 1103047 A1 20010530; US 6620480 B1 20030916
DOCDB simple family (application)
FR 9801745 W 19980805; EP 98941545 A 19980805; US 74493501 A 20010516