AMD eyes 45-nanometer transistors

Advanced Micro Devices (AMD) researchers have revealed details of how the company plans to build processors using the next-generation 45-nanometre process technology that AMD hopes to have in production by as early as 2007.

Speaking at a Institute of Electrical and Electronics Engineers (IEEE) meeting in Washington, D.C., the researchers discussed how AMD would use a combination of new manufacturing techniques to reduce the size of the components in its chips.

"What we talked about at the conference today was the learning curve we had to go through," the vice-president of technology development with AMD, Craig Sander, said. "This design makes it possible for 45-nanometre processors to actually work."

A nanometre is one-billionth of a metre. Chips built with a 45-nanometre process will have individual circuit lines that are as small as 45 billionths of a meter and components that are as small as 20 nanometres, according to AMD.

But AMD's 45-nanometre chips were at least four years away, Sander said.

Chipmakers are just now beginning to come out with products built using a 90-nanometre process.

To get to 45 nanometres, AMD's researchers plan to use a technique called fully depleted silicon-on-insulator that reduces the electrical charge built up in different parts of a transistor.

Researchers also plan to build transistor gates on the chip out of metal called nickel-silicide, as opposed to the polysilicon that is typically used today, and will increase the ability for electricity to flow between atoms on a chip using a process called local straining.

Both Intel and AMD are looking to solve one of the key problems with 45-nanometre technology: power leakage. Last month, Intel disclosed that its 45-nanometre process would use an unnamed "high-k" material designed to help prevent electric current from leaking to other parts of the chip.

AMD's approach aims to solve the power leakage problem using "more conventional materials," an analyst with the Insight64 consulting firm, Nathan Brookwood, said.

What was remarkable about AMD’s presentation, however, was not the technology, but the fact that it was being revealed, Brookwood said.

"Unlike in years past when they more or less kept this stuff to themselves, they're now going out and talking it up a little," he said.

With its 64-bit Opteron and Athlon 64 processors, AMD was now seeking customers who simply cared more about its future technology, Brookwood said.

"When they were a seller of chips that went into value PCs, their semiconductor prowess was less relevant," he said.

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Robert McMillan

IDG News Service
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