News - Coming Soon From DuPont: Advances in ...
... With proper dispersion, small amounts of a new DuPont nanomaterial called DNM in
a polymer can produce substantial property improvements, according to Dr. Rao. ...
Intel, IBM Unveil New Transistors
Hafnium-based materials will be incorporated in 45-nm-technology chips
Alex Tullo
IN DUELING ANNOUNCEMENTS that mark the culmination of years of research efforts, Intel and IBM say they are using hafnium-based dielectric insulating materials to construct the transistors in their next-generation 45-nm-technology chips.
Silicon dioxide has been the transistor dielectric material of choice for about 40 years. As chip size has continued to shrink, the SiO2 layer has been made thinner and thinner to maintain adequate capacitance. In the most advanced chips in production today, which have 65-nm circuit lines, the SiO2 layer is only 1.2 nm thick.Intel
Test wafer for a 45-nm-technology chip uses hafnium.
But according to David Lammers, director of the WeSrch.com networking website for semiconductors—part of the semiconductor market research firm VLSI Research—a layer any thinner is prone to heat-generating electron tunneling. "You want a thinner electrical thickness, but you don't want all the current leakage and heat," he says.
A day after Intel's announcement, IBM said it had successfully made transistors with a hafnium-based high-k and metal combination with partners Advanced Micro Devices, Sony, and Toshiba.
How Evaporating Carbon Nanotubes Retain Their Perfection?Feng Ding, Kun Jiao, Yu Lin, and Boris I. Yakobson*
Department of Mechanical Engineering and Materials Science and Department of Chemistry, Rice University, Houston, Texas 77005
Received November 24, 2006
Revised January 27, 2007
Abstract:
We present a mechanism of high-temperature sublimation of carbon nanotubes that does not destroy their ordered makeup even upon significant loss of mass. The atoms depart to the gas phase from the pentagon-heptagon dislocation cores, while the bond disruption is immediately repaired, and the 57 seamlessly propagate through the lattice. This explains a broad class of unsettled phenomena when at high temperature or under radiation the nanotubes do not become amorphous but rather shrink in size nearly flawlessly.
Well,the connection with small business?
In 1959 the Nobel laureate physicist Richard Feynman, in his visionary lecture entitled "There's plenty of room at the bottom", proposed the development of technology to function at the cellular and even the molecular level. Among other things he said, "...it would be interesting in surgery if you could
swallow the surgeon". This is precisely the plot of the 1966 film
'The Fantastic Voyage', made into a novel by Isaac Asimov, in which a submarine containing a medical team is shrunk and injected into a patient to perform a life saving operation. While Hollywood has to suspend the laws of physics, Feynman's proposals were based solidly on those very laws.
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