Tunneling Transistors Creep Near, Could Replace MOSFETs
January 31, 2013 7:10 PM
comment(s) - last by
Long-standing device gets a nanotechnology boost
It's taking a dive into
, but the III-V tunneling field effect transistor (TFET) is finally creeping close to the widely used metal-oxide-semiconductor field effect transistor (MOSFET).
III-V TFETs are a three terminal extension of the tunneling diode, a device invented in 1957, which earned inventor Leo Esaki a Nobel Prize in Physics. Nicknamed the "Esaki transistor/diode" in his honor, the device went largely overlooked due to low driving currents in most applicable materials.
But a team led by electrical engineering professor
Rochester Institute of Technology
(RIT) has tuned the transistors to approach MOSFET performance. A key to the tuning was the work of graduate researcher David Pawlik who grew sub-120 nanometer vertical TFETs on a test chip that allow hundreds of diodes to be tested per sample. The research allowed multiple kinds of homojunction and heterojunctions to be tested.
Working with fellow graduate researchers Brian Romanczyk and Paul Thomas, as well as collaborators at
(a non-profit research consortium backed by top chipmakers) and
Texas State University
, the team recorded a record peak current density of 2.2 MA/cm^2.
The benefit of the III-V TFET is that they operate at a much lower voltage than MOSFETs and thus consume less watts of power. The record setting design ran at -0.3 V.
As its name implies, a tunneling FET is similar voltage wise to driving through a hill, instead of down one, says Professor Rommel. [Image Source: NCWpics]
Professor Rommel likens the traditional MOSFET to driving down a hill, voltage-wise, while the TFET, driven by quantum effects, is more like digging a tunnel through the hill. He
on the record current levels, "The tunneling field effect transistors have not yet demonstrated a sufficiently large drive current to make it a practical replacement for current transistor technology, but this work conclusively established the largest tunneling current ever experimentally demonstrated, answering a key question about the viability of tunneling field effect transistor technology."
He suggests in the paper that a peak current of 10 MA/cm^2 should be possible with high levels of doping in
The results could be applied in everything from smartphones to solar cells. Professor Rommel suggests tuned TFETs could reduce processor power consumption by a factor of 10, allowing longer battery life for phones and other devices.
The work was presented at a December at the
International Electron Devices Meeting (IEDM)
in San Francisco, Calif. The work was funded by
The National Science Foundation
(NSF), SEMATECH, and RIT's Office of the Vice President of Research.
This article is over a month old, voting and posting comments is disabled
RE: longer battery life...
1/31/2013 8:25:51 PM
The direction that the portable electronics market has been moving combined with the amount of competition in that market leads me to believe that you are most likely wrong.
"Mac OS X is like living in a farmhouse in the country with no locks, and Windows is living in a house with bars on the windows in the bad part of town." -- Charlie Miller
Scientists Cook Up 1-Atom Transistor, 12-Atom Magnetic Storage
February 20, 2012, 7:20 PM
Researchers Discover New Silicon Alternative
November 23, 2010, 10:53 AM
BlackBerry’s Latest "Plug" for its Passport Smartphone: Displaying Sharp X-rays for Doctors
August 21, 2014, 4:49 PM
Sprint Introduces $60 Unlimited Plan, Touts $20/Month Costs Savings Versus T-Mobile
August 21, 2014, 2:05 PM
Opera Becomes Official Browser of Microsoft-Nokia's Non-Windows Phones
August 21, 2014, 1:01 PM
Microsoft Tests Free 24-Hour Xbox One Game Trials
August 21, 2014, 11:41 AM
New Photos Show “Assembled” iPhone 6, Protruding Camera Ring
August 20, 2014, 2:32 PM
ZTE Nubia 5S mini LTE 4.7" Smartphone Headed to U.S. for $280 Unlocked
August 20, 2014, 10:37 AM
Most Popular Articles
Lumia 830 Gets Major Upgrades Including New 20.1 Megapixel Toshiba Sensor
August 15, 2014, 6:00 PM
Windows Phone, BlackBerry Smartphone Market Share Falls to 2.5%, 0.5% Respectively
August 15, 2014, 9:44 AM
GM Concedes That the Cadillac ELR Doesn’t Really Compete with the Tesla Model S
August 15, 2014, 5:42 PM
Report: Windows 9 “Threshold” Tech Preview Coming Next Month
August 15, 2014, 11:29 AM
Apple Scores Patents, Preps New Reversible USB Plug for iPhone 6 Connector
August 18, 2014, 1:32 PM
Latest Blog Posts
Space Terrorism is a Looming Threat For the United States
Apr 23, 2014, 7:47 PM
Facebook Aims to Provide Internet to "Every Person in the World" with Drones, Satellites
Apr 1, 2014, 10:20 AM
Retail Mobile Sites Experience Outages in Light of Simplexity's Bankruptcy
Mar 14, 2014, 8:48 AM
Tesla vs. BMW: Who Has the Safer EV?
Feb 1, 2014, 2:56 PM
Justice Leaks Details of Next HTC One Two Flagship Phone
Dec 5, 2013, 4:04 PM
More Blog Posts
Copyright 2014 DailyTech LLC. -
Terms, Conditions & Privacy Information