The rewritable data storage medium (1) has a rewritable recording layer (9) provided with a tracking structure (8). Said layer (9) has a data recording area (5). An erasable identification mark is present in an identification mark area (4, 4') other than the data recording area (5). The data recording area (5) has a first tracking structure (8'), whereas the identification mark area (4, 4') is substantially free from a tracking structure or has a second tracking structure (8") substantially different from the first tracking structure (8'). Thus erasure of the identification mark is practically impossible, because the location of the erasing spot of a recorder cannot be controlled precisely in radial direction.
申请公布号
WO0163620(A3)
申请公布日期
2002.01.10
申请号
WO2001EP01510
申请日期
2001.02.09
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.
发明人
SPRUIT, JOHANNES, H., M.;TALSTRA, JOHAN, C.;BRONDIJK, ROBERT, A.;DRENTEN, RONALD, R.