Heat-conducting Crystals Could Help Computer Chips Keep Their Cool


Reading time ( words)

If your laptop or cellphone starts to feel warm after playing hours of video games or running too many apps at one time, those devices are actually doing their job.

Image caption: Researchers at UT Dallas and their collaborators have created and characterized tiny crystals of boron arsenide that have high thermal conductivity.

Whisking heat away from the circuitry in a computer’s innards to the outside environment is critical: Overheated computer chips can make programs run slower or freeze, shut the device down altogether or cause permanent damage.

As consumers demand smaller, faster and more powerful electronic devices that draw more current and generate more heat, the issue of heat management is reaching a bottleneck. With current technology, there’s a limit to the amount of heat that can be dissipated from the inside out.

Researchers at The University of Texas at Dallas and their collaborators at the University of Illinois at Urbana-Champaign and the University of Houston have created a potential solution, described in a study published online July 5 in the journal Science.

Dr. Bing Lv (pronounced “love”), assistant professor of physics in the School of Natural Sciences and Mathematics at UT Dallas, and his colleagues produced crystals of a semiconducting material called boron arsenide that have an extremely high thermal conductivity, a property that describes a material’s ability to transport heat.

heat_conducting.jpg

UT Dallas physics researchers recently published a study in the journal Science that describes the high thermal conductivity of boron arsenide crystals they grew in the lab. From left: study authors Xiaoyuan Liu, Dr. Bing Lv and Dr. Sheng Li.

“Heat management is very important for industries that rely on computer chips and transistors,” said Lv, a corresponding author of the study. “For high-powered, small electronics, we cannot use metal to dissipate heat because metal can cause a short circuit. We cannot apply cooling fans because those take up space. What we need is an inexpensive semiconductor that also disperses a lot of heat.”

Most of today’s computer chips are made of the element silicon, a crystalline semiconducting material that does an adequate job of dissipating heat. But silicon, in combination with other cooling technology incorporated into devices, can handle only so much.

Diamond has the highest known thermal conductivity, around 2,200 watts per meter-kelvin, compared to about 150 watts per meter-kelvin for silicon. Although diamond has been incorporated occasionally in demanding heat-dissipation applications, the cost of natural diamonds and structural defects in man-made diamond films make the material impractical for widespread use in electronics, Lv said.

Share


Suggested Items

Beyond Scaling: An Electronics Resurgence Initiative

06/05/2017 | DARPA
The Department of Defense’s proposed FY 2018 budget includes a $75 million allocation for DARPA in support of a new, public-private “electronics resurgence” initiative. The initiative seeks to undergird a new era of electronics in which advances in performance will be catalyzed not just by continued component miniaturization but also by radically new microsystem materials, designs, and architectures.

DARPA Researchers Develop Novel Method for Room-Temperature Atomic Layer Deposition

09/01/2016 | DARPA
DARPA-supported researchers have developed a new approach for synthesizing ultrathin materials at room temperature—a breakthrough over industrial approaches that have demanded temperatures of 800 degrees Celsius or more. T

Finessing Miniaturized Magnetics into the Microelectronics Mix

06/20/2016 | DARPA
A newly-announced DARPA program is betting that unprecedented on-chip integration of workhorse electronic components, such as transistors and capacitors, with less-familiar magnetic components with names like circulators and isolators, will open an expansive pathway to more capable electromagnetic systems.



Copyright © 2018 I-Connect007. All rights reserved.