IBM carbon nanotube breakthrough could bring faster, smaller chips

Researchers at IBM say they've made a major breakthrough in carbon nanotube technology that could speed the development of smaller, faster and more powerful chips.

The reflection of Roland Germann, manager of IBM's Nanotechnology Center Operations at IBM Research Zurich, is seen in a silicon wafer. Credit: IBM

The reflection of Roland Germann, manager of IBM's Nanotechnology Center Operations at IBM Research Zurich, is seen in a silicon wafer. Credit: IBM

Researchers at IBM say they've made a major breakthrough in carbon nanotube technology that could speed the development of smaller, more powerful chips.

The team has figured out a way to connect carbon nanotubes -- tiny, conducting tubes of carbon atoms -- with silicon transistors in such a way that the size of the connection doesn't adversely affect its electrical properties.

Shrinking the size of transistors and their associated circuitry is vital if chip technology is going to follow Moore's Law and keep getting more powerful, but conventional technology is fast approaching its limits.

Earlier this year, an international consortium led by IBM disclosed development of a test chip with transistors as small as 7 nanometers -- roughly 10,000 times thinner than a human hair.

IBM carbon nanotubes IBM

Carbon nanotubes contained in a solution are seen in an IBM laboratory.

The transistors make excellent high-speed switches -- exactly what are needed for more powerful supercomputers and smartphones -- and carbon nanotubes make excellent tiny conductors for connecting them together, but there's been a problem.

As the size of the contact between the chip and carbon nanotube gets smaller, the resistance increases. Engineers want the contact to be as small as possible, but higher resistance means using power -- the opposite of what's required.

"You really don't want the contact resistance to dominate in the device," said Wilfried Haensch, an IBM research engineer. "If resistance gets higher and higher, it doesn't matter what happens in the device because it's limited by resistance."

That's where IBM's latest breakthrough comes in. The company has figured out a way to interconnect the transistors and carbon nanotubes in a way that the resistance doesn't vary with the size of the connection.

But IBM still has work to do. The new technique provides a uniform resistance of about 30 kiloohms at all sizes of connector and IBM wants to reduce that to around 18 kiloohms.

The research will be published in the Oct. 2 edition of Science.

Last year, IBM said it would spend $3 billion over the next 5 years to push research and development in advanced chip technology at 7 nanometers and beyond. That research includes carbon nanotubes as well as quantum computing, low-power transistors and silicon photonics.

Join the Good Gear Guide newsletter!

Error: Please check your email address.

Tags IBM

Our Back to Business guide highlights the best products for you to boost your productivity at home, on the road, at the office, or in the classroom.

Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Martyn Williams

IDG News Service
Show Comments

Father’s Day Gift Guide

Most Popular Reviews

Latest News Articles

Resources

GGG Evaluation Team

Kathy Cassidy

STYLISTIC Q702

First impression on unpacking the Q702 test unit was the solid feel and clean, minimalist styling.

Anthony Grifoni

STYLISTIC Q572

For work use, Microsoft Word and Excel programs pre-installed on the device are adequate for preparing short documents.

Steph Mundell

LIFEBOOK UH574

The Fujitsu LifeBook UH574 allowed for great mobility without being obnoxiously heavy or clunky. Its twelve hours of battery life did not disappoint.

Andrew Mitsi

STYLISTIC Q702

The screen was particularly good. It is bright and visible from most angles, however heat is an issue, particularly around the Windows button on the front, and on the back where the battery housing is located.

Simon Harriott

STYLISTIC Q702

My first impression after unboxing the Q702 is that it is a nice looking unit. Styling is somewhat minimalist but very effective. The tablet part, once detached, has a nice weight, and no buttons or switches are located in awkward or intrusive positions.

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?