IBM builds tiny circuit board with DNA scaffolding

IBM researchers are using DNA scaffolding to build tiny circuit boards.
The semiconductor industry is looking at new classes of transistors that use carbon nanotubes or silicon nanowires for developing sub-22-mm lithographic technology. IBM says its approach of using DNA molecules as scaffolding — where millions of carbon nanotubes could be deposited and self-assembled into precise patterns by sticking to the DNA molecules — may provide a way to reach sub-22 nm lithography.
IBM Researchers and collaborator Paul W.K. Rothemund, of the California Institute of Technology, report that their advancement combines lithographic patterning with self-assembly, which is a method to arrange DNA origami structures on surfaces compatible with today’s semiconductor manufacturing equipment.
As a result, the DNA nanostructures can serve as scaffolds, or miniature circuit boards, for the precise assembly of components such as carbon nanotubes, nanowires and nanoparticles at dimensions significantly smaller than possible with conventional semiconductor fabrication techniques, said the researchers.
They say this opens up the possibility of creating functional devices that can be integrated into larger structures.
“The cost involved in shrinking features to improve performance is a limiting factor in keeping pace with Moore’s Law and a concern across the semiconductor industry,” said Spike Narayan, manager, Science & Technology, IBM Research - Almaden, in a statement. “The combination of this directed self-assembly with today’s fabrication technology eventually could lead to substantial savings in the most expensive and challenging part of the chip-making process.”
The paper, “Placement and orientation of DNA nanostructures on lithographically patterned surfaces,” by scientists at IBM Research and the California Institute of Technology, will be published in the September issue of Nature Nanotechnology.
Touch user interfaces have made significant advances in the consumer electronics market particularly for mobile phones and notebook computers, opening the door for adoption in other applications including white goods, computer peripherals, medical equipment, and instrumentation. Synaptics made its debut in the home appliance market earlier this year with the launch of the Samsung Hauzen ZERO air conditioner.
Smaller distributors were the only ones to post sales gains in 2009. Interestingly, two of the five distributors that posted growth last year -- Interstate Connecting Components and Sherburn Electronics -- derive 100 percent of their sales from interconnect products. Both of them also target the military/aerospace industry. Here are the top 10 sales leaders by ICs, passives/electromechanical devices, interconnects and computer products as well as sales growth.

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