Feeds

Fujitsu preps carbon nanotube heat-sink

Mobile phone base-station chips to run faster, cooler

Secure remote control for conventional and virtual desktops

Fujitsu has figured out how to cool chips using carbon nanotubes, though it's going to a few years yet before the technology is ready for commercial usage, the company admitted.

The cooling system is a heat-sink, created out of millions of 15µm-long nanotubes. The nanotubes are 'grown' on the wafer substrate using an iron catalyst. The structure of the heat-sink matches the pattern of the electrode 'bumps' on the base of the chip through which it connects to the motherboard.

The chips in question are high-frequency power amplifiers, typically used in mobile phone base-stations. Today, these chips are limited by the heat they generate, which must be quickly dissipated, and by the way they're connected to the motherboard. Currently, the best method to connect them for maximum heat dissipation is not the best way to allow the chips to be driven at ever-higher frequencies. To get the higher frequencies, a different connection method is needed, but it's one that's less able to dissipate the heat.

Fujitsu claims its nanotube heat-sink squares the circle: it's able to dissipate sufficient heat to allow the second, 'flip chip' connection method to be used to operate the chips at higher frequencies.

The company said it will now work to refine the density of the nanotubes around the bumps to improve heat dissipation even further. It said it expects the technology to appear in mobile phone base-stations in around three years' time. ®

Next gen security for virtualised datacentres

More from The Register

next story
Boffins attempt to prove the UNIVERSE IS JUST A HOLOGRAM
Is this the real life? Is this just fantasy?
Our LOHAN spaceplane ballocket Kickstarter climbs through £8000
Through 25 per cent but more is needed: Get your UNIQUE rewards!
NASA to reformat Opportunity rover's memory from 125 million miles away
Interplanetary admins will back up data and get to work
LOHAN tunes into ultra long range radio
And verily, Vultures shall speak status unto distant receivers
SpaceX prototype rocket EXPLODES over Texas. 'Tricky' biz, says Elon Musk
No injuries or near injuries. Flight stayed in designated area
Galileo, Galileo! Galileo, Galileo! Galileo fit to go. Magnifico
I'm just a poor boy, nobody loves me. But at least I can find my way with ESA GPS by 2017
EOS, Lockheed to track space junk from Oz
WA facility gets laser-eyes out of the fog
prev story

Whitepapers

5 things you didn’t know about cloud backup
IT departments are embracing cloud backup, but there’s a lot you need to know before choosing a service provider. Learn all the critical things you need to know.
Implementing global e-invoicing with guaranteed legal certainty
Explaining the role local tax compliance plays in successful supply chain management and e-business and how leading global brands are addressing this.
Backing up Big Data
Solving backup challenges and “protect everything from everywhere,” as we move into the era of big data management and the adoption of BYOD.
Consolidation: The Foundation for IT Business Transformation
In this whitepaper learn how effective consolidation of IT and business resources can enable multiple, meaningful business benefits.
High Performance for All
While HPC is not new, it has traditionally been seen as a specialist area – is it now geared up to meet more mainstream requirements?