[citation][nom]formin[/nom]go IBM !!!!!!this removes 3 or 4 steps in the chip fabrication process[/citation]
Well yes, but this would serialize a massively parallel process, to use the terms inappropriately. This method lays down the atoms(?) one at a time, while photolithography lays one layer down all at once. I think that the gain of skipping multiple expose and etch steps would be swamped by the cost of building the circuit atom-by-atom.
It might be a good way to make prototypes. OTOH, with a reasonable half-billion transistors in a chip, if the machine could lay down a thousand gates a second, it would take (punching buttons instead of using mind) five days and change to make one chip.