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Come in Copper, Your Time's Up

Posted January 23, 2008 8:54 AM

From scenta RSS Feed - STEM:

Microchip experts are predicting the end of the use of connecting copper wire in circuits as it may soon limit computer speed. The progress that has seen computers get faster, more powerful, as well as smaller, may soon hit a stumbling block as the point of contact between parts of a chip - the copper interconnects - are becoming bottlenecks for data. Commenting on the state of technology, Dries Van Thourhout from Ghent University's Photonics Research Group said: "Copper-wire-interconnects place serious limitations on the performance of silicon integrated circuits. It is hard to transmit data down these interconnects in a sufficiently fast, power-efficient way. It is a problem of bandwidth and copper will not be able to cope with the processing power of tomorrow's microchips." A possible alternative may be the use of light in the form of optical interconnects. These have, experts claim, the potential to be far more efficient and less energy-hungry than existing copper interconnects.

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#1

Re: Come in Copper, Your Time's Up

01/25/2008 8:41 AM

And than what?

The next stumbling block will be light? where do we go from there? Faster than light conductors?

Wangito.

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#2

Re: Come in Copper, Your Time's Up

01/30/2008 4:26 AM

There are two main problems with copper interconnects:

  1. Transit time
  2. Resistance

Transit time can be overcome by fabricating chipsets smaller and several onto the same chip, so we should have a full PC on a single chip.

Resistance could be overcome by using silver, but that has it's own problems in VLSI chip manufacturing, including silver's and other metals, which have the nasty habit of growing conductive whiskers.

I do believe that if current technology increases increase, we should be manufacturing optical calculating and computing chips within a decade.

The big problem faced is the interfaces needed to include onto a chip, and enable it to interconnect with the external world, and be effective/efficient at the job.

We also need better methods of manipulating/modulating light, in very small packages.

Kind Regards....

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