FLAECHENFOERMIGES, MEHRSCHICHTIGES, LASEROPTISCHES AUFZEICHNUNGSMATERIAL.

摘要

A flat, multilayer laser optical recording material comprising a dimensionally stable support and a thin, thermally modifiable recording layer consisting of Au and at least one metal chosen from Ru, Rh, Pd, Ag, Cu, Re, Os, Ir and Pt, the recording layer satisfying the following conditions: (a) it completely covers the underlying surface; (b) it contains 15-85 wt% Au w.r.t. the total layer, the Au being in predominantly non-alloyed form in a separate phase; (c) it exhibits a surface granularity with an ave. grain size of 10-200 nm; (d) the ave. layer depth d=5-300 nm where d=(dmin + dmax)/2 in which dmin= the ave. thickness of 10 fo the thinnest positions and dmax = the ave. thickness of 10 of the thickest positions on the recording layer; and (e) it is formed by at least 2-stage coating of the surface alernately with Au and with at least one of the other metals.