Comment Don't forget to clean your room... (Score 1) 362
Hopefully, I'm not duplicating someone's post... Being able to cut a tighter line is one thing. Being able to do it on a "making license plates" scale is something else. As you move increase the density of what is being packed on the chip, you have to be able to increasingly control for smaller and smaller particles. Each jump in Clean Room Technology is neither easy, nor inexpensive. For details, and a whole lot more related material:
http://www.lowtechmagazine.com/2009/06/embodied-energy-of-digital-technology.html