Feeds

Fujitsu preps carbon nanotube heat-sink

Mobile phone base-station chips to run faster, cooler

5 things you didn’t know about cloud backup

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. ®

Build a business case: developing custom apps

More from The Register

next story
Boffins ID freakish spine-smothered prehistoric critter: The CLAW gave it away
Bizarre-looking creature actually related to velvet worms
ANU boffins demo 'tractor beam' in water
The current state of the art, apparently
China to test recoverable moon orbiter
I'll have some rocks and a moon cheese pizza please, home delivery
NASA's rock'n'roll shock: ROLLING STONE FOUND ON MARS
No sign of Ziggy Stardust and his band
What does a flashmob of 1,024 robots look like? Just like this
Sorry, Harvard, did you say kilobots or KILLER BOTS?
Why your mum was WRONG about whiffy tattooed people
They're a future source of RENEWABLE ENERGY
Vulture 2 spaceplane autopilot brain surgery a total success
LOHAN slips into some sexy bespoke mission parameters
Another step forward for diamond-based quantum computers
Square cut or pear-shaped, these qubits don't lose their shape
LOHAN acquires aircraft arboreal avoidance algorithm acronyms
Is that an ARMADILLO in your PANTS or are you just pleased to see me?
prev story

Whitepapers

Endpoint data privacy in the cloud is easier than you think
Innovations in encryption and storage resolve issues of data privacy and key requirements for companies to look for in a solution.
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.
Top 8 considerations to enable and simplify mobility
In this whitepaper learn how to successfully add mobile capabilities simply and cost effectively.
Solving today's distributed Big Data backup challenges
Enable IT efficiency and allow a firm to access and reuse corporate information for competitive advantage, ultimately changing business outcomes.
Reg Reader Research: SaaS based Email and Office Productivity Tools
Read this Reg reader report which provides advice and guidance for SMBs towards the use of SaaS based email and Office productivity tools.