MIT develops hybrid chip

Processor speed is dependent on size. "We won't be able to continue improving silicon by scaling it down for long," Tomas Palacios, assistant professor in the Department of Electrical Engineering and Computer Science said: "It's very difficult to make them a lot smaller."

One answer is to use new advanced materials for the transistors. "There are several semiconductor materials that offer better performance than silicon," Palacios says. "The problem is, even though they allow for very fast transistors, they cannot compete with silicon in terms of integration and scalability."

But combining two different kinds of materials on a single, hybrid chip would allow conventional silicon to provide the vast majority of the transistors, while a material with better performance would be used for those that need to work faster.

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