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The resistivity of damascene Cu is measured at cross-sectional area as low as 95 nm2. The impact of aspect ratio and line edge roughness on resistivity is investigated. Kelvin resistance test structures are demonstrated with 28 nm pitch wires patterned by directed self-assembly of lamellar block copolymers. The effective resistivity of TaN/Ta/Cu wires is compared with alternative metals.
The resistivity of damascene copper is measured at pitch ranging down to 40 nm and copper cross-sectional area as low as 140 nm2. Metallization by copper reflow is demonstrated at 28 nm pitch with patterning by directed self-assembly (DSA). Extremely low line-edge-roughness (LER) is attained by surface reconstruction of a single crystal silicon mask. Variation of LER is found to have no impact on...
In this work we present a potential solution for forming ultra-shallow junctions with extremely low contact resistivities in which dopants are implanted into silicides and diffused to the semiconductor interface using low temperature anneals. Conventional silicide process requires a fine tuning of silicide thickness and deep source/drain doping profile to achieve low contact resistance and low source/drain...
An extremely low contact resistivity of 6-7 × 10-9 Ω·cm2 between Ni0.9Pt0.1Si and heavily doped Si is achieved through Schottky barrier engineering by dopant segregation. In this scheme, the implantation of B or As is performed into silicide followed by a low-temperature drive-in anneal. Reduction of effective Schottky barrier height is manifested in the elimination of nonlinearities in IV characteristics.
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