Silicon laminated media for archival optical storage

Details Silicon laminated media for archival optical storage Silicon laminated media for archival optical storage

G - Physics

11

B

352/32.4

G11B 7/24 (2006.01) G11B 7/243 (2006.01) G11C 13/04 (2006.01)

Patent

CA 1199404

SILICON LAMINATED MEDIA FOR ARCHIVAL OPTICAL STORAGE ABSTRACT Laminated media for optical storage of data in binary form include bi-layer and multi-layer structures of silicon and another element preferably a transition metal. Metals more useful are included in Groups VB, VIB, VIIB, and VIII on the periodic chart plus Mg and Au. More advantageous elements within the above group include V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Rh, Ni, Pd, Pt, and Au. The most effective elements are Pd, Pt, Cr, Ta, Rh, V, and Co. The metal can be deposited upon a silicon layer or vice versa. The latter is preferred where a recording laser beam hits the silicon layer first because the amount of energy reflected is reduced and the silicon layer on top passivates the metal layer. The materials are non- toxic. Bi-layers of rhodium and silicon have extremely long lifetimes, Pt and Si are long, Pd and Si are less long and Te alone has an extremely short lifetime comparatively.

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