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!
Fingerprints of quantum entanglement
16.02.2018 | University of Vienna
Simple in the Cloud: The digitalization of brownfield systems made easy
07.02.2018 | Deutsches Forschungszentrum für Künstliche Intelligenz GmbH, DFKI
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
For photographers and scientists, lenses are lifesavers. They reflect and refract light, making possible the imaging systems that drive discovery through the microscope and preserve history through cameras.
But today's glass-based lenses are bulky and resist miniaturization. Next-generation technologies, such as ultrathin cameras or tiny microscopes, require...
Scientists from the University of Zurich have succeeded for the first time in tracking individual stem cells and their neuronal progeny over months within the intact adult brain. This study sheds light on how new neurons are produced throughout life.
The generation of new nerve cells was once thought to taper off at the end of embryonic development. However, recent research has shown that the adult brain...
Theoretical physicists propose to use negative interference to control heat flow in quantum devices. Study published in Physical Review Letters
Quantum computer parts are sensitive and need to be cooled to very low temperatures. Their tiny size makes them particularly susceptible to a temperature...
Let’s say the armrest is broken in your vintage car. As things stand, you would need a lot of luck and persistence to find the right spare part. But in the world of Industrie 4.0 and production with batch sizes of one, you can simply scan the armrest and print it out. This is made possible by the first ever 3D scanner capable of working autonomously and in real time. The autonomous scanning system will be on display at the Hannover Messe Preview on February 6 and at the Hannover Messe proper from April 23 to 27, 2018 (Hall 6, Booth A30).
Part of the charm of vintage cars is that they stopped making them long ago, so it is special when you do see one out on the roads. If something breaks or...
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