New method of growing nanotube circuits may allow for faster processors

August 1, 2005 | Source: KurzweilAI

A new semiconductor fabrication method creates nanoscale circuits by dipping semiconductor chips into liquid suspensions of carbon nanotubes, rather than growing the nanotubes directly on the circuit.

Previously, most nanotube circuits have been made by growing each nanotube on the surface of a chip, using chemical vapor deposition. Unfortunately, this method often results in a circuit comprised of both types of nanotubes, metallic and semiconducting.

Furthermore, the growth direction of the nanotube is arbitrary, and their diameters are large. Small diameter carbon nanotubes are more useful for switches.

The researchers can now create nanotubes via processes separate from the chips, allowing for better control of the quality and diameter.

University of Pennsylvania news release