News The New Diamond Age

No not the latest book from Neal Stephenson, but a lengthy and interesting article from Wired on Sythetic Diamonds, and they're possible uses in computing and electronics:

Jim Butler is the head of a project known as Code 6174 - the Navy's diamond research arm, which is housed in a guarded facility outside Washington, DC. A civilian scientist, Butler has been been researching CVD diamond and semiconducting for the military for 16 years, long enough to see plenty of failure in the field. But today, he's more optimistic than ever. There have been three long-standing roadblocks to diamond semiconducting - and each of them appears to be on the verge of falling. First, diamond is viewed as wildly expensive, due to the artificial scarcity that De Beers maintains with its lock on the market. Synthesized diamonds created outside of the cartel will greatly reduce that problem. Second, there has never been a steady and dependable supply of large, pure diamonds. You can't depend on mined diamonds, as there is no way to ensure that each stone will have the same electrical properties as the next. Apollo's CVD diamonds solve that.

The third big challenge has been the most daunting for materials scientists: To form microchip circuits, positive and negative conductors are needed. Diamond is an inherent insulator - it doesn't conduct electricity. But both Gemesis and Apollo have been able to inject boron into the lattice, which creates a positive charge. Until now, though, no one had been able to manufacture a negatively charged, or n-type, diamond with sufficient conductivity. When I visit Butler in Washington, he can barely contain his glee. "There's been a major breakthrough," he tells me. In June, together with scientists from Israel and France, he announced a novel way of inverting boron's natural conductivity to form a boron-doped n-type diamond. "We now have a p-n junction," Butler says. "Which means that we have a diamond semiconductor that really works. I can now see an Intel diamond Pentium chip on the horizon."

More here

DeBeer's is running scared - I remember seeing a Horizon program on the Russian method about 18 months ago - and at the time DeBeers where considering 'hallmarking' diamonds with a laser to ensure natural diamonds could be identified.

 

And umm, what's wrong with silicon again?

edit:
/me reads rest of article: "ahh"