Featured Research

from universities, journals, and other organizations

Next-generation semiconductors synthesis

Date:
November 8, 2013
Source:
American Institute of Physics (AIP)
Summary:
Conventional processes for producing AIN layers run at temperatures as high as 1150 degrees Celsius, and offer limited control over the thickness of the layers. Now a new technique offers a way to produce high-quality AlN layers with atomic-scale thickness and at half the temperature of other methods.

Although silicon semiconductors are nearly universal in modern electronics, devices made from silicon have limitations -- including that they cease to function properly at very high temperatures. One promising alternative are semiconductors made from combinations of aluminum, gallium, and indium with nitrogen to form aluminum nitride (AlN), gallium nitride (GaN), and indium nitride (InN), which are stronger and more stable than their silicon counterparts, function at high temperatures, are piezoelectric (that is, generate voltage under mechanical force), and are transparent to, and can emit, visible light.

Related Articles


Conventional processes for producing AIN layers run at temperatures as high as 1150 degrees Celsius, and offer limited control over the thickness of the layers. Now a new technique, described in the AIP Publishing journal Applied Physics Letters, offers a way to produce high-quality AlN layers with atomic-scale thickness and at half the temperature of other methods.

Neeraj Nepal and colleagues of the United States Naval Research Laboratory in Washington, D.C. formed AIN layers using atomic layer epitaxy (ALE), in which materials are "grown," layer-by-layer, by sequentially employing two self-limiting chemical reactions onto a surface.

"For instance to grow aluminum nitride, you would inject a pulse of an aluminum precursor into the growth zone where it would coat all surfaces," explained Nepal. "After purging any excess aluminum precursor away, you would then 'build' the crystal by injecting a pulse of the nitrogen precursors into the growth zone, where it reacts with the aluminum precursor at the surface to form a layer of AlN. Then you'd purge any excess nitrogen and reaction products away and repeat the process."

With this process, the researchers produced a material with qualities similar to those synthesized at much higher temperatures, but under conditions that allow it to be integrated in new ways for the fabrication of devices for technologies such as transistors and switches.

The work, Nepal says, expands the potential for new advanced specialty materials that could be used, for example, in next-generation high-frequency radiofrequency electronics, such as those used for high-speed data transfer and cell phone services.


Story Source:

The above story is based on materials provided by American Institute of Physics (AIP). Note: Materials may be edited for content and length.


Journal Reference:

  1. N. Nepal, S. B. Qadri, J. K. Hite, N. A. Mahadik, M. A. Mastro, C. R. Eddy. Epitaxial growth of AlN films via plasma-assisted atomic layer epitaxy. Applied Physics Letters, 2013; 103 (8): 082110 DOI: 10.1063/1.4818792

Cite This Page:

American Institute of Physics (AIP). "Next-generation semiconductors synthesis." ScienceDaily. ScienceDaily, 8 November 2013. <www.sciencedaily.com/releases/2013/11/131108124656.htm>.
American Institute of Physics (AIP). (2013, November 8). Next-generation semiconductors synthesis. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2013/11/131108124656.htm
American Institute of Physics (AIP). "Next-generation semiconductors synthesis." ScienceDaily. www.sciencedaily.com/releases/2013/11/131108124656.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com
3D Printed Cookies Just in Time for Christmas

3D Printed Cookies Just in Time for Christmas

Reuters - Innovations Video Online (Dec. 18, 2014) A tech company in Spain have combined technology with cuisine to develop the 'Foodini', a 3D printer designed to print the perfect cookie for Santa. Ben Gruber reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins