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A reproducible method of the formation of pits in a sputtered carbon surface with a platinum-iridium tunneling tip is presented for possible use in lithography or data storage applications. Thin carbon films are sputtered on top of chrome and gold metallic underlayers on a silicon substrate. Overall surface roughness of the carbon films is under 3 Å. Holes are produced in the carbon film by applying short voltage pulses ~4–8 V in height, 250 ns–100 µs in length! across the tunneling gap. An array of holes written in the carbon demonstrate reproducibility and the feasibility of using this multilayered structure in a data storage system.
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