Owner LG Electronics Inc.

Inventors Kim, Jin-Hong; Seo, Hun; Park, KyungChan; Lee, Jun-Seok; Lee, SeoungWon

Agent Davies Collison Cave

Pub. Number AU-B-2003223127

PCT Number PCT/KR03/00787

PCT Pub. Number WO2004/025638

Priority 10-2002-0054603 10.09.02 KR

Filing date 17 April 2003

Wipo publication date 30 April 2004

Acceptance publication date 16 July 2009

G11B 7/09 (2006.01) Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - with provision for moving the light beam or focus plane for the purpose of maintaining alignment of the light beam relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following

G11B 7/24 (2006.01) Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - Record carriers characterised by the selection of the material or by the structure or form

G11B 7/26 (2006.01) Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation, reproducing using an optical beam at lower power - Apparatus or processes specially adapted for the manufacture of record carriers

G11B 23/00 (2006.01) Record carriers not specific to the method of recording or reproducing