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.
"Intel is investing heavily (think gazillions of dollars and bazillions of engineering man hours) in resources to create an Intel host controllers spec in order to speed time to market of the USB 3.0 technology." -- Intel blogger Nick Knupffer
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
Report: Windows Phone, Windows RT May be Offered Free to OEMs
December 12, 2013, 2:31 PM
New Policies for Cell Phone Unlocking to Arrive "Soon"
December 12, 2013, 12:43 PM
Facebook to Add Auto-Play Video to NewsFeed for All Mobile Users
December 12, 2013, 9:35 AM
AT&T CEO Says Carriers Can No Longer Foot the Bill for High-End, Subsidized Smartphones
December 11, 2013, 10:55 AM
IPotty and iPad Tot Seat Ignite Controversy: Brilliant or "Destructive"?
December 10, 2013, 6:22 PM
Quick Note: Sleek White Second-Gen Nexus 7 Goes on Sale for $269
December 10, 2013, 4:55 PM
Most Popular Articles
Experts: Masturbation Prevents Cancer, Diabetes, Insomnia, and Depression
December 6, 2013, 2:01 PM
Hackers Nab 2 Million Login Credentials from Facebook, Gmail, Twitter
December 5, 2013, 1:00 PM
Thieves Steal Truck with Cobalt-60 Onboard in Mexico, Will Die "Without a Doubt" from Exposure
December 5, 2013, 12:04 PM
Report: Windows 8.2 Revives Start Menu, Runs Metro Apps in Desktop Mode
December 10, 2013, 2:56 PM
U.S. Navy Fires "XFC" Drone from Underwater Submarine
December 6, 2013, 2:35 PM
Latest Blog Posts
Justice Leaks Details of Next HTC One Two Flagship Phone
Dec 5, 2013, 4:04 PM
Global Cyber Espionage Concerns Reveal Growing Cyber Armies
Nov 29, 2013, 11:04 AM
Is The Period Becoming an Expression of Anger?
Nov 26, 2013, 2:02 PM
NSA and Congress -- You Will Never Kill the Constitution, It's an Idea
Nov 10, 2013, 2:00 PM
AT&T Explores $100B+ USD Deal to Acquire Vodafone's European Operations
Nov 4, 2013, 7:34 AM
More Blog Posts
Copyright 2013 DailyTech LLC. -
Terms, Conditions & Privacy Information