Navigation Links
Slimmer, stickier nanorods give boost to 3-D computer chips
Date:3/17/2009

Troy, N.Y. Researchers at Rensselaer Polytechnic Institute have developed a new technique for growing slimmer copper nanorods, a key step for advancing integrated 3-D chip technology.

These thinner copper nanorods fuse together, or anneal, at about 300 degrees Celsius. This relatively low annealing temperature could make the nanorods ideal for use in heat-sensitive nanoelectronics, particularly for "gluing" together the stacked components of 3-D computer chips.

"When fabricating and assembling 3-D chips, and when bonding the silicon wafers together, you want as low a temperature as possible," said Pei-I Wang, research associate at Rensselaer's Center for Integrated Electronics. "Slimmer nanorods, by virtue of their smaller diameters, require less heat to anneal. These lower temperatures won't damage or degrade the delicate semiconductors. The end result is a less expensive, more reliable device."

Experimental 3-D computer chips are comprised of several layers of stacked components. Wang said these layers can be coated with thin nanorods, and then heated up to 300 degrees Celsius. Around that temperature, the thin nanorods anneal, turn into a continuous thin film, and fuse the layers together. This study was the first demonstration of slimmer nanorods enabling wafer bonding, according to Wang.

Fundamental research concerning the slimmer nanorods was led by Toh-Ming Lu, the R.P. Baker Distinguished Professor of Physics at Rensselaer. Results of the study were recently published in the journal Nanotechnology.

Research into wafer bonding and incorporating the slimmer nanorods into 3-D integrated computer chips was led by James Jian-Qiang Lu, associate professor in the Department of Electrical, Computer, and Systems Engineering (ECSE) and the Center for Integrated Electronics (CIE) at Rensselaer. Results of the study were recently published in the journal Electrochemical and Solid-State Letters.

The slimmer copper nanorods were formed by periodically interrupting the growth process. The vapor-deposition process was occasionally halted, and the fledgling nanorods were exposed to oxygen. This resulted in a forest of nanorods with diameters between 10 nanometers and 50 nanometers far smaller than the typical 100-nanometer diameter copper nanorods grown conventionally without interruption.

Vast forests, or arrays, of copper nanorods are produced by vapor deposition at an oblique angle. In a conventional setting, with an uninterrupted stream of copper atoms deposited in a vacuum onto a substrate, the deposition angle naturally results in taller, thicker nanorods.

Periodically interrupting the deposition, and exposing the copper nanorods to ambient air, however, leads to oxygen being absorbed into the surface of the nanorods. During subsequent depositions, this oxidized copper helps to prevent the vaporized copper atoms from migrating away from the very tips of the nanorods. This ensures the nanorods grow taller, without necessarily growing in diameter. The more growth interruptions, the thinner the resulting nanorods, Wang said.

Wang and the research group have filed for a patent for this new technology. The patent is currently pending.


'/>"/>

Contact: Michael Mullaney
mullam@rpi.edu
518-276-6161
Rensselaer Polytechnic Institute
Source:Eurekalert  

Related biology technology :

1. Purifying nanorods: Big success with tiny cleanup
2. Nanostructure boosts efficiency in energy transport
3. DuPont and International Rice Research Institute Partner to Boost Rice Yields
4. USDA Boosts Food Safety Research with Purchase of Waters ACQUITY TQD System
5. Mental Stimulus Package: Government Officials who Forgot to Pay Taxes Will Receive Free Memory-boosting Supplement
6. KanekaQH(TM) Ubiquinol Dramatically Boosts Ejection Fraction in Patients With Late-Stage Congestive Heart Failure
7. Capture of nanomagnetic fingerprints a boost for next-generation information storage media
8. AUDIO from Medialink and GlaxoSmithKline: FDA Approves Boostrix for Adults
9. Nanocoatings boost industrial energy efficiency
10. Winning University of Melbourne Ph.D. research boosts the search for sensitive sensors
11. New nanocluster to boost thin films for semiconductors
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Slimmer, stickier nanorods give boost to 3-D computer chips
(Date:2/8/2016)... , Feb. 8, 2016 Novan, Inc. today announced ... of the Board of Directors of Novan. In addition, Robert ... North Carolina . --> ... also announced that it received a total of $32.8 million of ... from its private investor network originating throughout the Research Triangle area ...
(Date:2/8/2016)... ... February 08, 2016 , ... Bulk food product ... foods at various stages of the production process. Despite frequently inspecting loose product ... products post packaging such as sacks of dry powders. , Mettler-Toledo Product Inspection's ...
(Date:2/8/2016)...  Diplomat Pharmacy, Inc. (NYSE: DPLO) announced today that its new website has gone live. On ... and mobile-friendly. Visit the new site: www.diplomat.is ... ... ... "The goal was to reimagine the website and ...
(Date:2/5/2016)... 5, 2016 ATCC, the premier global biological ... the medical and life science researchers that are working ...   CDC website . --> ... virus is a single-stranded RNA virus of the Flaviviridae ... Dengue and Chikungunya Viruses. Zika virus is transmitted to ...
Breaking Biology Technology:
(Date:2/9/2016)... Vigilant Solutions announces today that an agency used ... a lead in a difficult homicide case. The agency then ... the suspect vehicle. Due to the ongoing investigation, the agency ... at the agency,s request. --> ... was found deceased at an intersection here in the City. ...
(Date:2/3/2016)... --> --> Fourth quarter 2015:   ... fourth quarter of 2014. Gross margin was 46% (32). ... Earnings per share increased to SEK 6.39 (loss: 0.49). Cash ... --> --> January to December ... 1,142% compared with 2014. Gross margin was 43% (31). ...
(Date:2/2/2016)... , Feb. 2, 2016  BioMEMS devices ... primarily focused on medical screening and diagnostic ... parameters. Wearable devices that facilitate and assure ... of movement are being bolstered through new ... biomedical signal acquisition coupled with wireless connectivity ...
Breaking Biology News(10 mins):