Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Revolutionary method generates new template for microelectronics

25.02.2009
Copolymer may enable 10 times more computer memory

Researchers say a newly tested method for producing super dense, defect-free, thin polymer films is the fastest, most efficient method ever achieved and it may dramatically improve microelectronic storage capabilities such as those in computer memory sticks.

In the February 20 issue of the journal Science, researchers at the University of Massachusetts Amherst and their colleagues at the University of California Berkeley, report how they designed a new way to guide the self-assembly of the material used to store computer memory, layered block copolymers, and generate up to 10 times more storage space than similarly sized copolymers.

The researchers say they developed a defect-free method that can generate more than 10-terabit-per-square-inch copolymer where other efforts achieved at most one terabit per square inch. A terabit is an information storage unit equal to one trillion bits.

"We can generate nearly perfect arrays over macroscopic surfaces where the density is over 15 times higher than anything achieved before," said Thomas Russell director of the UMass Materials Research Science and Engineering Center. He co-led the research with Ting Xu, a member of the Department of Materials Science and Engineering at Berkeley. "We applied a simple concept to solve several problems at once, and it really worked out," Russell said.

The concept involved stacking atoms more closely together than previously thought possible to produce the highest density copolymer ever achieved, one capable of storing more information than previous copolymers. Researchers used surface ridges of a base crystal to guide the assembly very much like using the corrugations in cardboard to direct how closely marbles can be packed together.

For the copolymer's base layer, the researchers used commercially-available sapphire wafers, which start out flat. After heating them from 1300 to 1500 degrees Celsius for 24 hours, the wafer's surface reorganized into a sawtooth topography with an inherent orientation. A thin copolymer film layer then was applied causing the underlying sawtooth corrugations to guide the film's self-assembly in a highly-ordered way to form an ultra-dense hexagonal, or honeycomb, crystalline lattice.

Additionally, by varying the annealing temperature, the scientists were able to change the angle and height of the sawteeth and the depth of the troughs between their peaks. The result enabled researchers to produce more densely packed troughs, which is where computer memory is stored.

The work was supported by the National Science Foundation and the Department of Energy's Office of Basic Energy Science.

"I expect this new method of producing highly ordered macroscopic arrays of nanoscopic elements will revolutionize the microelectronic and storage industries and perhaps others," said Russell.

He points out most previous efforts to create a well-ordered base material onto which electronic information is stored topped out at 15 nanometers for the smallest achievable pattern size. But "we've shattered that barrier and I think we can go farther," Russell said.

"This research by the teams at UMass Amerherst and Berkeley represents a significant breakthrough in the use of polymer self-assembly to create a high density of addressable locations in a thin film," said NSF program manager William J. Brittain. "Most significantly, the simple crystalline lattice used as the template may serve as a revolutionary step for a new generation of computer memory."

Bobbie Mixon | EurekAlert!
Further information:
http://www.nsf.gov

More articles from Physics and Astronomy:

nachricht Airborne thermometer to measure Arctic temperatures
11.01.2017 | Moscow Institute of Physics and Technology

nachricht Next-generation optics offer the widest real-time views of vast regions of the sun
11.01.2017 | New Jersey Institute of Technology

All articles from Physics and Astronomy >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Designing Architecture with Solar Building Envelopes

Among the general public, solar thermal energy is currently associated with dark blue, rectangular collectors on building roofs. Technologies are needed for aesthetically high quality architecture which offer the architect more room for manoeuvre when it comes to low- and plus-energy buildings. With the “ArKol” project, researchers at Fraunhofer ISE together with partners are currently developing two façade collectors for solar thermal energy generation, which permit a high degree of design flexibility: a strip collector for opaque façade sections and a solar thermal blind for transparent sections. The current state of the two developments will be presented at the BAU 2017 trade fair.

As part of the “ArKol – development of architecturally highly integrated façade collectors with heat pipes” project, Fraunhofer ISE together with its partners...

Im Focus: How to inflate a hardened concrete shell with a weight of 80 t

At TU Wien, an alternative for resource intensive formwork for the construction of concrete domes was developed. It is now used in a test dome for the Austrian Federal Railways Infrastructure (ÖBB Infrastruktur).

Concrete shells are efficient structures, but not very resource efficient. The formwork for the construction of concrete domes alone requires a high amount of...

Im Focus: Bacterial Pac Man molecule snaps at sugar

Many pathogens use certain sugar compounds from their host to help conceal themselves against the immune system. Scientists at the University of Bonn have now, in cooperation with researchers at the University of York in the United Kingdom, analyzed the dynamics of a bacterial molecule that is involved in this process. They demonstrate that the protein grabs onto the sugar molecule with a Pac Man-like chewing motion and holds it until it can be used. Their results could help design therapeutics that could make the protein poorer at grabbing and holding and hence compromise the pathogen in the host. The study has now been published in “Biophysical Journal”.

The cells of the mouth, nose and intestinal mucosa produce large quantities of a chemical called sialic acid. Many bacteria possess a special transport system...

Im Focus: Newly proposed reference datasets improve weather satellite data quality

UMD, NOAA collaboration demonstrates suitability of in-orbit datasets for weather satellite calibration

"Traffic and weather, together on the hour!" blasts your local radio station, while your smartphone knows the weather halfway across the world. A network of...

Im Focus: Repairing defects in fiber-reinforced plastics more efficiently

Fiber-reinforced plastics (FRP) are frequently used in the aeronautic and automobile industry. However, the repair of workpieces made of these composite materials is often less profitable than exchanging the part. In order to increase the lifetime of FRP parts and to make them more eco-efficient, the Laser Zentrum Hannover e.V. (LZH) and the Apodius GmbH want to combine a new measuring device for fiber layer orientation with an innovative laser-based repair process.

Defects in FRP pieces may be production or operation-related. Whether or not repair is cost-effective depends on the geometry of the defective area, the tools...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

12V, 48V, high-voltage – trends in E/E automotive architecture

10.01.2017 | Event News

2nd Conference on Non-Textual Information on 10 and 11 May 2017 in Hannover

09.01.2017 | Event News

Nothing will happen without batteries making it happen!

05.01.2017 | Event News

 
Latest News

Solar Collectors from Ultra-High Performance Concrete Combine Energy Efficiency and Aesthetics

16.01.2017 | Trade Fair News

3D scans for the automotive industry

16.01.2017 | Automotive Engineering

Nanoparticle Exposure Can Awaken Dormant Viruses in the Lungs

16.01.2017 | Life Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>