When Gordon Moore noted that the number of transistors one can cram into a given square of silicon doubles every 18 to 24 months, he hadn't yet foreseen the demise of optical lithography, the physics-dictated limit to today's CPU fabrication technologies. In the race to build smaller and faster transistor technology, much attention has been lavished on carbon nanotubes. These strands of carbon atoms, measuring less than 1/50,000 the width of a human hair, are the strongest and most conductive fibers known. However, it wasn't until May that researchers at IBM's Watson Research Center ( ) proved nanotubes could outperform silicon. In traditional silicon and metal chip technology, individual wires are subject to many resistive forces that interfere with electron movement, thus requiring more power and generating more heat. Because nanotubes are so thin, interfering forces can't bump electrons sideways. This lets designers create lower-power chips and chips with faster transistors. In an IBM announcement, the research group demonstrated it achieved the highest current-carrying capacity (transconductance) of any nanotube structure yet devised. This was done using single-wall CNFETs (carbon nanotube field-effect transistors) constructed similarly to MOSFETs (metal-oxide-semiconductor field-effect transistors), the transistor type common in today's world of integrated circuits. The team's
Products & Services
RF MOSFET Transistors
MOSFET RF transistors are metal-oxide semiconductor field-effect transistors (MOSFETs) that are designed to handle high-power RF signals from devices such as stereo amplifiers, radio transmitters, TV monitors, etc.
SRAM Memory Chips
Static random access memory (SRAM) chips do not need to be refreshed like DRAM chips. This makes SRAM chips faster and more reliable.
RF transistors are designed to handle high-power radio frequency (RF) signals in devices such as stereo amplifiers, radio transmitters, and television monitors.
Transistors are electronic devices made of semiconductor material that amplify a signal or open or close a circuit.
FLASH Memory Chips
FLASH memory chips offer extremely fast access times, low power consumption, and relative immunity to severe shock or vibration. They do not need a constant power supply to retain their data.
Topics of Interest
One of the most amazing characteristics of carbon nanotubes is that they can be metallic, like copper, or semiconducting, like silicon, depending on their structure. These properties were first...
Chapter 5: References
[5.1] S.J. Tans, R.M. Verschueren, and C. Dekker, "Room Temperature Transistor Based on a Single Carbon Nanotube," Nature, 393, pp. 49 52, 1998.
Given the semiconducting character of two thirds of carbon nanotubes, their high aspect ratio and structural robustness, it is natural to ask if semiconducting carbon nanotubes can...
5.5 Carbon Nanotube FETs
Single walled carbon nanotubes were discovered in 1993 [5.6], and only a few years later carbon nanotube field-effect transistors (CNTFETs) [5.1, 5.2, 5.3] and circuits...
The impact of mechanical deformations on the electronic structure and electronic transport properties of materials is of both fundamental and applied interest. One example of this is the recent...