Intel could start building chips with the new "trigate transistors" by 2010, enabling either a 45% increase in speed or a 35% reduction in total power used, compared to the company's current 65-nanometer process transistors, said Mike Mayberry, director of components research and vice president of Intel's Technology and Manufacturing Group.

The advance could be a powerful sales tool, since power efficiency is a crucial marketing metric for chips in everything from powerful servers to mobile laptops and handheld PDAs.

Advanced Micro Devices Inc. has purchased billboard ads that claim that electricity costs for systems with its Opteron chips are lower than those of systems with Intel's Xeon chips. And Sun Microsystems Inc. frequently taunts competitors Hewlett-Packard Co. and IBM for using fans to cool their servers, instead of using more-efficient chips like Sun's UltraSparc T1.

Intel's new technology would also extend the reach of Moore's Law, the 40-year-old prediction by Intel co-founder Gordon Moore that the number of transistors on a chip would double about every two years.

Engineers have recently predicted that that trend would end soon, because electricity tends to leak out of tiny wires as chip geometry shrinks below 90nm.

One solution is to build chips with multiple cores that run at slower speeds, since chips leak more electricity and run less efficiently when they run faster than 2 GHz. Chip makers such as Intel, AMD and Sun have all followed this path.

Another answer could be carbon nanotubes, according to scientists at IBM, who said in March they had built an electronic integrated circuit by combining conventional silicon technology with a carbon nanotube molecule.

But Intel says its trigate solution is the best.

"Compared to carbon nanotubes, it is far easier to build," Mayberry said. "The problem with carbon nanotubes is that no one knows how to put them in a particular spot except by moving them one at a time. Even our smallest chips have millions of transistors, so that is an insurmountable challenge."

A trigate transistor is a component in the standard CMOS design that acts as a better "traffic cop" to control the flow of electrons, surrounding each wire on three sides instead of just one.

"It's better to wrap the gate around, just like it's easier to block a garden hose by squeezing on all sides than just holding your thumb on one side," he said.

The technology is still on the drawing board, but Intel designers will be able to quickly apply it to new chips someday because they can use existing equipment in the fabrication plants.

"This will be an option for chips somewhere beyond 45nm -- in the 32nm or 22nm mode -- so that gives us confidence we can continue scaling Moore's Law into the next decade," said Mayberry.
Intel has said it will be making more chips with 65nm geometry than 90nm by the third quarter of this year, and it will move to 45nm in 2007 and 32nm by 2009.