IBM Demonstrate World’s Fastest Graphene Transistor

In a just-published paper in the magazine Science, IBM researchers demonstrated a radio-frequency graphene transistor with the highest cut-off frequency achieved so far for any graphene device – 100 billion cycles/second (100 GigaHertz).

This accomplishment is a key milestone for the Carbon Electronics for RF Applications (CERA) program funded by DARPA, in an effort to develop next-generation communication devices.

The high frequency record was achieved using wafer-scale, epitaxially grown graphene using processing technology compatible to that used in advanced silicon device fabrication.

IBM Demonstrate World's Fastest Graphene Transistor

“A key advantage of graphene lies in the very high speeds in which electrons propagate, which is essential for achieving high-speed, high-performance next generation transistors,” said Dr. T.C. Chen, vice president, Science and Technology, IBM Research. “The breakthrough we are announcing demonstrates clearly that graphene can be utilized to produce high performance devices and integrated circuits.”

Graphene is a single atom-thick layer of carbon atoms bonded in a hexagonal honeycomb-like arrangement. This two-dimensional form of carbon has unique electrical, optical, mechanical and thermal properties and its technological applications are being explored intensely.

Uniform and high-quality graphene wafers were synthesized by thermal decomposition of a silicon carbide (SiC) substrate. The graphene transistor itself utilized a metal top-gate architecture and a novel gate insulator stack involving a polymer and a high dielectric constant oxide. The gate length was modest, 240 nanometers, leaving plenty of space for further optimization of its performance by scaling down the gate length.

It is noteworthy that the frequency performance of the graphene device already exceeds the cut-off frequency of state-of-the-art silicon transistors of the same gate length (~ 40 GigaHertz). Similar performance was obtained from devices based on graphene obtained from natural graphite, proving that high performance can be obtained from graphene of different origins. Previously, the team had demonstrated graphene transistors with a cut-off frequency of 26 GigaHertz using graphene flakes extracted from natural graphite.

Source: IBM, ScienceDaily

Related posts

AMD has exascale heterogeneous processor in the works

AMD has exascale heterogeneous processor in the works

While AMD is not doing well on the CPU market at the moment, the US company might have an ace in its sleeve – according to online sources AMD has published a new paper, along with the IEEE, that deals with a new high-density computing device concept, which is called Exascale Heterogeneous...

BFG Technologies launchs two new graphics cards - GeForce GTX 295 H2OC and GeForce GTX 285 OCFU

BFG Technologies®, Inc., the leading North American and European supplier of advanced NVIDIA-based 3D graphics cards, power supplies, and the Phobos™ High-Performance Gaming/Home Theater System, announced today the launch of two new additions to BFG’s GeForce family, the BFG GeForce® GTX 295...

MSI Launch U110 ECO Netbook

MSI today announces U110 ECO in Wind Netbook. U110 ECO is the world's power saving No.1 Netbook! The battery life of U110 ECO is around 9 hours*. This amazing battery life can escalate the mobility and the productiveness of U110 ECO, which can also make your daily lives much more...

Leave a comment