Optical recording disk

Details Optical recording disk Optical recording disk

1993-06-07

1995-05-16

Ryan, Patrick J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428457, 428913, 430270, 430945, 346 76L, 3461351, B32B 300

Patent

active

054159148

ABSTRACT:
An optical recording disk includes on a substrate 2, a dye recording layer 3, a lower reflective lamina 4, an upper reflective lamina 5, and a protective coat 6. The lower reflective lamina 4 is formed of Au, Pt, Ag, Al or an alloy thereof and the upper reflective lamina 5 is of a stainless steel composition or an alloy containing 30 wt % or more of Cu and at least one element selected from the group consisting of Zn, Ti, V, Ta, Cr, Mo, W, Mn, Fe, Co, Rh, Ni, Pd, Pt, Ag, Au, Al, Sn, Si, Pb, Cd, Hg, Ca, In, As, Sb, Bi, Se, Te, Ge, N and O. The disk is well reliable and less costly.

REFERENCES:
patent: 4839883 (1989-06-01), Nagata
patent: 5075147 (1991-12-01), Usami
patent: 5093174 (1992-03-01), Suzuki
Nikkei Electronics; 23 Jan. 1989; No. 465; p. 107 The Functional Dye Department of the Kinki Chemical Society; 3 Mar. 1989; pp. 15-20.
SPIE; vol. 10978, Optical Recording Topical Meeting; 1989 Hamada et al., pp. 80-87.

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