PCs under $1000 Low cost PCs from Toshiba, Compaq and Acer. iMacs in stock Find out why it's hot for just $1270. Think different. Product Search

Breakthroughs affirm computer guru's growth theory

Moore's Law is kaput? Nuked? Whacked?

Gordon Moore laughs. Moore is the legendary co-founder of Intel and the man for whom Moore's Law is named. The warm laugh is the kind amused adults use when a little tyke says something outrageous.

I've asked him if innovations unveiled in the past week blow past his theory governing all of computerdom.

"These things are not blowing by Moore's Law," he says. "They're helping to keep up with it."

Moore's Law is the metronome for the pace of change in technology. It states, in its most quoted form, that the number of components that can be packed on a computer chip doubles every 18 months while the price stays the same. Essentially, that means that computer power per dollar doubles every 18 months. The law, amazingly, has held true for more than 30 years. Companies from Bell Atlantic to BackWeb Technologies build their plans around it.

To technology people, saying Moore's Law is obsolete is like telling airplane makers the law of gravity has changed. Yet, in the past week, pundits and news stories have proclaimed that recent developments mean technology will race ahead faster than Moore's Law predicts.

The first development came from Intel. It introduced an advance that would let it pack twice as much data in a memory chip. A few days later, IBM said it had developed a way to use microscopic copper wiring instead of aluminum in computer chips, which would help IBM make faster, cheaper microprocessors.

But neither alters Moore's Law. They only remove barriers that would have hindered technology from keeping up with the law. And that's what always happens. The past 30 years, there have been lots of barriers to Moore's Law. But someone always comes up with a way to move past them. And the law marches on.

It's been so on-target for so long, no one is quite sure whether its pace is inevitable, or whether Moore's Law has become Moore's Goal, and everybody works to try to keep the pace going. Moore leans toward the latter. "Companies realize they have to keep up with Moore's Law or fall behind," he says. "So it's really become kind of a driving force."

Others see it differently. "I used to think (Moore's Law) was a historical curiosity. As I continued to work on it, I thought it was a self-fulfilling prophecy," says Randy Isaac, head of basic science at IBM. "Now I view it more as a self-consistent economic cycle."

A self-what? Isaac explains that, basically, there are a lot of factors - expectations, money and many different pieces of technology - that feed and play off one another to perpetuate Moore's Law. "It just hangs together," he says.

And, somehow, breakthroughs come when they're needed. IBM's was one. Chips long have used aluminum wires because copper doesn't work well with silicon. But aluminum doesn't conduct electricity as well as copper. In a few years, the wires in chips will be so tiny, not enough electricity could move through aluminum wires. That would brake the pace of change.

IBM found a way to make copper wires work with silicon so enough electricity can get through the ever-shrinking wires. "It removes that barrier and allows us to continue with Moore's Law," Isaac says.

Still, Moore's Law probably won't hold true forever. There are serious barriers ahead. Optical lithography, used in making chips, will reach its limits in about 10 years. Insulators on chips are only four or five atoms thick. They can't get much smaller.

"By 2010 or 2020, we'll see a slowing in our ability to make things smaller," Moore says.

He then might have to retool Moore's Law, which, not many people know, he's done before. "In 1965, I said the number of components would double every year. In 1975, I updated it."

To say the number would double every 18 months, like everyone says?

"No. Every two years, which has held true. I never said 18 months."

Whoops.

By Kevin Maney, USA TODAY