cronincal

Dec 16, 3:14 AM EST

Chip-Shrinking May Be Nearing Its Limits
By JORDAN ROBERTSON
AP Technology Writer



SAN JOSE, Calif. (AP) -- Sixty years after transistors were invented and nearly five decades since they were first integrated into silicon chips, the tiny on-off switches dubbed the "nerve cells" of the information age are starting to show their age.

The devices - whose miniaturization over time set in motion the race for faster, smaller and cheaper electronics - have been shrunk so much that the day is approaching when it will be physically impossible to make them even tinier.

Once chip makers can't squeeze any more into the same-sized slice of silicon, the dramatic performance gains and cost reductions in computing over the years could suddenly slow. And the engine that's driven the digital revolution - and modern economy - could grind to a halt.

Even Gordon Moore, the Intel Corp. co-founder who famously predicted in 1965 that the number of transistors on a chip should double every two years, sees that the end is fast approaching - an outcome the chip industry is scrambling to avoid.

"I can see (it lasting) another decade or so," he said of the axiom now known as Moore's Law. "Beyond that, things look tough. But that's been the case many times in the past."

Preparing for the day they can't add more transistors, chip companies are pouring billions of dollars into plotting new ways to use the existing transistors, instructing them to behave in different and more powerful ways.

Intel, the world's largest semiconductor company, predicts that a number of "highly speculative" alternative technologies, such as quantum computing, optical switches and other methods, will be needed to continue Moore's Law beyond 2020.

"Things are changing much faster now, in this current period, than they did for many decades," said Intel Chief Technology Officer Justin Rattner. "The pace of change is accelerating because we're approaching a number of different physical limits at the same time. We're really working overtime to make sure we can continue to follow Moore's Law."

Transistors work something like light switches, flipping on and off inside a chip to generate the ones and zeros that store and process information inside a computer.

The transistor was invented by scientists William Shockley, John Bardeen and Walter Brattain to amplify voices in telephones for a Bell Labs project, an effort for which they later shared the Nobel Prize in physics.

On Dec. 16, 1947, Bardeen and Brattain created the first transistor. The next month, on Jan. 23, 1948, Shockley, a member of the same research group, invented another type, which went on to become the preferred transistor because it was easier to manufacture.

Transistors' ever-decreasing size and low power consumption made them an ideal candidate to replace the bulky vacuum tubes then used to amplify electrical signals and switch electrical currents. AT&T saw them as a replacement for clattering telephone switches.

Transistors eventually found their way into portable radios and other electronic devices, and are most prominently used today as the building blocks of integrated circuits, another Nobel Prize-winning invention that is the foundation of microprocessors, memory chips and other kinds of semiconductor devices.

Since the invention of the integrated circuit in the late 1950s - separately by Texas Instruments Inc.'s Jack Kilby and future Intel co-founder Robert Noyce - the pace of innovation has been scorching.

The number of transistors on microprocessors - the brains of computers - has leaped from just several thousand in the 1970s to nearly a billion today, a staggering feat that has unleashed previously unimagined computing power.

"I think (the transistor) is going to be around for a long time," Moore said. "There have been ideas about how people are going to replace it, and it's always dangerous to predict something won't happen, but I don't see anything coming along that would really replace the transistor."

But there have been considerable stumbling blocks in recent years.

One problem has been trying to prevent too much heat from escaping from thinner-and-thinner components. That has led chip companies to look for new materials and other ways to improve performance.

Earlier this year, Intel and IBM Corp. separately announced that they discovered a way to boost transistor efficiency.

The solution involves replacing the silicon dioxide used for more than 40 years as an insulator, but has since been shaved too thin, with various metals in parts called the gate, which turns the transistor on and off, and the gate dielectric, an insulating layer, which helps improve transistor performance and retain energy.

Still more novel ways to prevent electricity leakage - and other problems - are being pursued. And nobody has won a bet against maintaining the pace of innovation in technology.

"The only thing that's been predicted more frequently than Moore's Law has been its demise - everybody's been wrong," said Sun Microsystems Inc. Chief Technology Officer Greg Papadopoulos. "It's a pretty robust set of observations and really it's about techno-economics ... It's a dangerous thing to bet against because of the economic investment cycle that's in there."

© 2007 The Associated Press

Malkavian

Optical is the way to go

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Looks like i picked the wrong week to quit sniffing glue

The_Heretic

Quantum computing is what they're looking at. It allows a single point of the chip to do not one calculation at a time but many. In fact the more points the more calculations can be carried out at once.

3 results in 6
4 results in 12
5 results in 20
6 results in 30
7 results in 42
and so on.

So far [last I read] they proved it using a chlorine atom to get the prime factors of 15, but that means proof of concept affirmed.

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John McCain: "He's in Iraq... with a few centuries to kill."

Malkavian

Too far out I work in optical, and we are ready to hit the street with functional materials now. Well, as soon i fish out all the dead flies anyway. (they like the taste of my heating oil). Not with chips though... communications devices.

__________________
Looks like i picked the wrong week to quit sniffing glue

The_Heretic

On the Science Channel they had the 2008 discoveries of the year show. One of the subjects- apparently it's been worked on more, was quantum computers. The concept was to splpit one photon into two, so they work as loaded dice. Regardless what the first lands on the second lands on a second number so that they're always seven [as they describe it]. So, back to what I described above, the chlroine atom would either spit out 1 and 15 or 3 and 5 as factors of 15 when bombarded by a certain EM frenquency.

__________________

John McCain: "He's in Iraq... with a few centuries to kill."