Designers of semiconductor devices are like downhill skiers - they thrive on speed. And achieving speed in the semiconductor business is all about the stuff you start with. While silicon is still the mainstay of the industry, circuit designers also would like to put materials like gallium nitride and silicon carbide into wider use. Such advanced semiconductor materials can operate at higher voltages and provide faster switching speeds, an important characteristic in determining how fast a semiconductor circuit can process information.
Reporting in the Sept. 22 issue of Applied Physics Letters, a National Institute of Standards and Technology (NIST) researcher and a Korean guest researcher describe a new method for scanning semiconductors for defects that may help accelerate the market for these newer materials. The duo combined an atomic force microscope with a scanning capacitance microscope and then added custom software and a simple on/off switch for the AFMs positioning laser.
The result is an instrument that can measure how fast a material generates electrical charges and then map those speeds in sections (at least for gallium nitride) that are only about 100 nanometers square. Current methods for measuring switching speed (carrier lifetime) produce only bulk averages.
Phil Bulman | EurekAlert!
Defining the backbone of future mobile internet access
21.07.2017 | IHP - Leibniz-Institut für innovative Mikroelektronik
Researchers create new technique for manipulating polarization of terahertz radiation
20.07.2017 | Brown University
Physicists have developed a new technique that uses electrical voltages to control the electron spin on a chip. The newly-developed method provides protection from spin decay, meaning that the contained information can be maintained and transmitted over comparatively large distances, as has been demonstrated by a team from the University of Basel’s Department of Physics and the Swiss Nanoscience Institute. The results have been published in Physical Review X.
For several years, researchers have been trying to use the spin of an electron to store and transmit information. The spin of each electron is always coupled...
What is the mass of a proton? Scientists from Germany and Japan successfully did an important step towards the most exact knowledge of this fundamental constant. By means of precision measurements on a single proton, they could improve the precision by a factor of three and also correct the existing value.
To determine the mass of a single proton still more accurate – a group of physicists led by Klaus Blaum and Sven Sturm of the Max Planck Institute for Nuclear...
The research team of Prof. Dr. Oliver Einsle at the University of Freiburg's Institute of Biochemistry has long been exploring the functioning of nitrogenase....
A one trillion tonne iceberg - one of the biggest ever recorded -- has calved away from the Larsen C Ice Shelf in Antarctica, after a rift in the ice,...
Physics supports biology: Researchers from PTB have developed a model system to investigate friction phenomena with atomic precision
Friction: what you want from car brakes, otherwise rather a nuisance. In any case, it is useful to know as precisely as possible how friction phenomena arise –...
21.07.2017 | Event News
19.07.2017 | Event News
12.07.2017 | Event News
21.07.2017 | Earth Sciences
21.07.2017 | Power and Electrical Engineering
21.07.2017 | Physics and Astronomy