Feeds

Fujitsu preps carbon nanotube heat-sink

Mobile phone base-station chips to run faster, cooler

Intelligent flash storage arrays

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. ®

Providing a secure and efficient Helpdesk

More from The Register

next story
GRAV WAVE DRAMA: 'Big Bang echo' may have been grit on the scanner – boffins
Exit Planet Dust on faster-than-light expansion of universe
Mine Bitcoins with PENCIL and PAPER
Forget Sudoku, crunch SHA-256 algos
SpaceX Dragon cargo truck flies 3D printer to ISS: Clawdown in 3, 2...
Craft berths at space station with supplies, experiments, toys
NASA rover Curiosity drills HOLE in MARS 'GOLF COURSE'
Joins 'traffic light' and perfect stony sphere on the Red Planet
'This BITE MARK is a SMOKING GUN': Boffins probe ancient assault
Tooth embedded in thigh bone may tell who pulled the trigger
DOLPHINS SMELL MAGNETS – did we hear that right, boffins?
Xavier's School for Gifted Magnetotaceans
Big dinosaur wowed females with its ENORMOUS HOOTER
That's right, Doris, I've got biggest snout in the prehistoric world
Japanese volcano eruption reportedly leaves 31 people presumed dead
Hopes fade of finding survivors on Mount Ontake
That glass of water you just drank? It was OLDER than the SUN
One MEELLION years older. Some of it anyway
prev story

Whitepapers

A strategic approach to identity relationship management
ForgeRock commissioned Forrester to evaluate companies’ IAM practices and requirements when it comes to customer-facing scenarios versus employee-facing ones.
Storage capacity and performance optimization at Mizuno USA
Mizuno USA turn to Tegile storage technology to solve both their SAN and backup issues.
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?
Beginner's guide to SSL certificates
De-mystify the technology involved and give you the information you need to make the best decision when considering your online security options.
Security for virtualized datacentres
Legacy security solutions are inefficient due to the architectural differences between physical and virtual environments.