Global Patent Index - EP 0858657 A1

EP 0858657 A1 19980819 - SINGLE SURFACED SUPER-DENSITY OPTICAL DISCS

Title (en)

SINGLE SURFACED SUPER-DENSITY OPTICAL DISCS

Title (de)

EINSEITIGE OPTISCHE PLATTEN MIT SEHR HOHER DICHTE

Title (fr)

DISQUES OPTIQUES A TRES HAUTE DENSITE A UNE FACE

Publication

EP 0858657 A1 19980819 (EN)

Application

EP 97941171 A 19970905

Priority

  • IB 9701237 W 19970905
  • US 70888696 A 19960905

Abstract (en)

[origin: WO9810418A1] A compact disc with digital data optically recorded thereon has two thickness regions. The first thickness region is a central cylindrical region (1.2 mm), the second thickness region is the remaining annular region of the disc (0.6 mm) having a label area (label applied) and has less than 3/4 and more than 1/4 with the thickness of the first region.

IPC 1-7

G11B 7/24; G11B 3/70; B32B 3/02; G03C 5/00

IPC 8 full level

G11B 7/007 (2006.01); G11B 7/24 (2013.01)

CPC (source: EP)

G11B 7/24 (2013.01)

Designated contracting state (EPC)

AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 9810418 A1 19980312; AU 4317197 A 19980326; AU 718994 B2 20000504; EP 0858657 A1 19980819; EP 0858657 A4 20000705; JP H11515131 A 19991221

DOCDB simple family (application)

IB 9701237 W 19970905; AU 4317197 A 19970905; EP 97941171 A 19970905; JP 51242898 A 19970905