Recorders – Record receivers and/or driving means therefor – Laminated – impregnated – or coated bases
Patent
1989-02-09
1991-04-16
Fuller, Benjamin R.
Recorders
Record receivers and/or driving means therefor
Laminated, impregnated, or coated bases
427299, 427304, 428333, 428612, 428913, 430495, 430508, 430945, G01D 900, B32B 324, G03C 100, B05D 300
Patent
active
050086871
ABSTRACT:
An improved optical data storage medium is reponsive to incident electromagnetic radiation, and the surface or a surface region of the medium includes a layer of heat sensitive material which has a textured surface pattern in the form of a regular array of grooves or protuberances, the dimensions of the surface features which constitute said textured surface pattern being in the sub-micron range. The textured surface pattern is overcoated with a thin film of an alloy, said alloy comprising (1) a first component which is at least one of ruthenium, rhodium, palladium, osmium, iridium and platinum; and (2) at least one other metallic element, preferably from Groups Va, VIa, VIIa, and Ib of the Periodic Table of elements according to Mendeleev.
The preferred alloy compositions for such data storage media contain platinum and tungsten. Specific alloy compositions based on platinum/tungsten are also provided, as is the use of certain alloy compositions in providing an overcoating layer for optical data storage media.
REFERENCES:
patent: 4414273 (1983-11-01), Wada et al.
patent: 4616237 (1986-10-01), Pettigrew et al.
Abrams Michael J.
Helfet Peter R.
Longman Robert J.
Fuller Benjamin R.
Plasmon Limited
Preston Gerald E.
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