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Imec Achieves Breakthroughs in Enabling Future DRAM and RRAM - SEMICON WEST- Booth 1724, South Hall, Moscone Center, San Francisco, US
Imec Achieves Breakthroughs in Enabling Future DRAM and RRAM

 

NewswireToday - /newswire/ - Leuven, Belgium, 2011/07/12 - SEMICON WEST- Booth 1724, South Hall, Moscone Center, San Francisco, US.

   
 
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In the frame of its research on future memory architectures, imec has made breakthroughs for both DRAM and RRAM memories. For DRAM, MIMcap (metal-insulator-metal capacitor) was established as a clear candidate for 1X DRAM scaling. Imec demonstrated a record low leakage current and was able to explain the mechanism for leakage reduction, showing the path for further potential improvement. For Resistive RAM (RRAM), imec built a model to understand the properties of the filaments that result in a stable RRAM operation. Such fundamental understanding of the filament properties is key to bridge the gap in the development of RRAM as a successor memory technology.

One of the major technical challenges for the DRAM industry is the difficulty to maintain target leakage currents at lower Effective Oxide Thicknesses (EOT) to meet the DRAM capacitor scaling roadmap. Recently, imec demonstrated a novel RuOx/STO/TiN stack that showed a 100x reduction in leakage with DRAM MIMcap compatible dielectrics at 0.4nm equivalent oxide thickness (EOT). Now, imec has achieved a further 10x improvement by optimizing the stack, resulting in a record leakage current density (JG) of 2x10-8A/cm² at 0.4nm EOT. In addition, imec was able to explain the mechanism of leakage reduction. This allowed a path to demonstrate a further potential through lowering the trap density, to a theoretical leakage current density (JG) limit for trap-free STO of 10-15A/cm² at ~0.4nm EOT. These results demonstrate that the STO-based stack is a promising technology for DRAM scaling.

RRAM is a promising concept for future non-volatile memories. In RRAM, a dielectric, which is normally insulating, can be made conductive through a filament or conduction path formed by applying a sufficiently high voltage. Imec now has made breakthroughs in understanding the properties of the filaments. Imec established a.o. that the minimal achievable current after reset depends on the physical nature of the filaments, resulting in a direct method to predict that current from the filament properties. With these results, it is now possible to choose the desired properties of the filaments to ensure a stable RRAM operation.

These results were obtained in cooperation with imec’s key partners in its core CMOS programs Globalfoundries, INTEL, Micron, Panasonic, Samsung, TSMC, Elpida, Hynix, Fujitsu and Sony.

About imec
Imec performs world-leading research in nanoelectronics. Imec leverages its scientific knowledge with the innovative power of its global partnerships in ICT, healthcare and energy. Imec (imec.be) delivers industry-relevant technology solutions. In a unique high-tech environment, its international top talent is committed to providing the building blocks for a better life in a sustainable society. Imec is headquartered in Leuven, Belgium, and has offices in Belgium, the Netherlands, Taiwan, US, China and Japan. Its staff of about 1,900 people includes more than 500 industrial residents and guest researchers. In 2010, imec's revenue (P&L) was 285 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.) and imec China (IMEC Microelectronics (Shangai) Co. Ltd.).

 
 
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Written by / Agency / Source: Imec

 
 

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Imec Achieves Breakthroughs in Enabling Future DRAM and RRAM

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Imec |
Publisher Contact: Katrien Marent - imec.be 
+32 16 28 18 80 katrien.marent[.]imec.be
 
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IMPORTANT INFORMATION: Issuance, publication or distribution of this press release in certain jurisdictions could be subject to restrictions. The recipient of this press release is responsible for using this press release and the information herein in accordance with the applicable rules and regulations in the particular jurisdiction. This press release does not constitute an offer or an offering to acquire or subscribe for any Imec securities in any jurisdiction including any other companies listed or named in this release.

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