editor's blog
Subscribe Now

Graphene Quilts

A while back we looked at wide bandgap materials like GaN when used for power devices, but, along with power comes heat and the need for it to be dissipated. GaN isn’t great for that; the old sapphire substrates were very bad, and newer (and more expensive) SiC substrates are better but not sufficient, according to researchers at UC Riverside.

Metal is often used as a heat sink, but its ability to do so in very thin films dissipates because the main “mobile” element is the electron. In graphene, however, the main dissipative component is the phonon – essentially, the ability to carry the crystal vibration efficiently, and this remains effective even for just a few layers.

So they built transistors with “quilts” of graphene on the actual transistor drains, connecting it to graphite heat sinks (although they say other heat sinks are possible too). These can be more effective because they insinuate themselves deep into the circuit without substantially disrupting the topology due to their use of “few-layer graphene” (FLG).

Of course, today, graphene is typically obtained by flaking graphite – something of an inexact science. They see graphene growth as a reality in the future, which would make the whole process a bit more deterministic.

You can find out more and get access to a paper published in Nature here

Leave a Reply

featured blogs
Apr 23, 2024
Do you think you are spending too much time fine-tuning your SKILL code? As a SKILL coder, you must be aware that producing bug-free and efficient code requires a lot of effort and analysis. But don't worry, there's good news! The Cadence Virtuoso Studio platform ha...
Apr 22, 2024
Learn what gate-all-around (GAA) transistors are, explore the switch from fin field-effect transistors (FinFETs), and see the impact on SoC design & EDA tools.The post What You Need to Know About Gate-All-Around Designs appeared first on Chip Design....
Apr 18, 2024
Are you ready for a revolution in robotic technology (as opposed to a robotic revolution, of course)?...

featured video

How MediaTek Optimizes SI Design with Cadence Optimality Explorer and Clarity 3D Solver

Sponsored by Cadence Design Systems

In the era of 5G/6G communication, signal integrity (SI) design considerations are important in high-speed interface design. MediaTek’s design process usually relies on human intuition, but with Cadence’s Optimality Intelligent System Explorer and Clarity 3D Solver, they’ve increased design productivity by 75X. The Optimality Explorer’s AI technology not only improves productivity, but also provides helpful insights and answers.

Learn how MediaTek uses Cadence tools in SI design

featured chalk talk

Silence of the Amps: µModule Regulators
In this episode of Chalk Talk, Amelia Dalton and Younes Salami from Analog Devices explore the benefits of Analog Devices’ silent switcher technology. They also examine the pros and cons of switch mode power supplies and how you can utilize silent switcher µModule regulators in your next design.
Dec 13, 2023
18,324 views