Thursday, October 19, 2006

US Patent 7122461 - Nanofabrication Using Carbon Nanotubes and DNA

Nanotubes and DNA have separately been proposed as candidates for new forms of nanoelectronics. This patent from Intel combines these materials for facilitating the selective placement of nanotubes on a substrate by functionalizing nanotubes with DNA.

Claim 14 reads:

14. A method to assemble an interconnect, comprising: functionalizing a first end and a second end of a first set of carbon nanotubes with a first set of DNA segments; providing a platform having an individually addressable array of nano-electrodes, the electrodes having a surface with a second set of DNA segments that are complementary to the first set of DNA segments; applying voltages to the electrodes to couple the first end of the carbon nanotubes with the electrodes to form a first layer selectively; coupling a second set of carbon nanotubes having a third set of DNA segments to the second end of the first set of carbon nanotubes to form a second layer; wherein coupling comprises selectively coupling specific nano-materials to the semiconductor device being formed by applying different electrical potentials to individually addressable electrodes and by providing nano-materials of varied lengths and dimensions; repeating a coupling of additional sets of carbon nanotubes to the first and second sets of carbon nanotubes until the interconnect is formed on the platform; detaching the interconnect from the platform; disposing the detached interconnect on a substrate; and plating the interconnect.