EP 1067535 A9 20010516 - Information recording medium
Title (en)
Information recording medium
Title (de)
Optisches Aufzeichnungsmedium
Title (fr)
Support d'enregistrement optique
Publication
Application
Priority
JP 18914999 A 19990702
Abstract (en)
[origin: EP1067535A2] At the least, a first recording layer 2 and a translucent film layer 3 are laminated in order on a transparent substrate 1 to form a first information recording/reproduction unit; and at the least, a reflective film layer 6 and a second recording layer 5 are laminated in order on a transparent substrate 7 to form a second information recording/reproduction unit. Then, the first and the second information recording/reproduction units are glued together by a transparent bonding layer 4, with the translucent film layer 3 facing the second recording layer 5, so that a two-layer information recording medium is obtained. Further, grooves G and lands L are formed for the first and the second recording layers 2 and 5. The depths of the grooves are substantially equal for the first and the second recording layers 2 and 5, the heights of the lands L are substantially equal for the first and the second recording layers 2 and 5, and the depth of the grooves G are greater than the height of the lands L. <IMAGE>
IPC 1-7
IPC 8 full level
G11B 7/007 (2006.01); G11B 7/24 (2006.01)
CPC (source: EP US)
G11B 7/007 (2013.01 - EP US); G11B 7/00718 (2013.01 - EP US); G11B 7/24 (2013.01 - EP US); G11B 7/24038 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE
DOCDB simple family (publication)
EP 1067535 A2 20010110; EP 1067535 A3 20020109; EP 1067535 A9 20010516; JP 2001023237 A 20010126; US 2005063295 A1 20050324
DOCDB simple family (application)
EP 00305480 A 20000629; JP 18914999 A 19990702; US 98158304 A 20041105