The structure of a 1-nm transistor with a carbon nanotube gate is proposed. Free Technical Library News

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Structure of a 1-nm carbon nanotube gate transistor proposed

09.10.2016

Developers from the University of California at Berkeley have proposed using carbon nanotubes as a gate rather than a transistor channel.

There are no critical obstacles on the way to transistors with a 5-nm gate. Anything less is questionable. At the stage of reducing technological standards to less than 5 nm, the effect of quantum tunneling begins to manifest itself, and this is an uncontrollable increase in leaks (losses). However, all this concerns traditional models of the structure of transistors based on conventional semiconductors. Therefore, transistors with a gate less than 5 nm promise to be of a different structure and using new materials.

One such material is carbon nanotubes. IBM, for example, has developed a 1,8nm carbon tube transistor model as the conductive channel of the transistor. Developers from the University of California at Berkeley took a different path and proposed using carbon nanotubes as the gate of a transistor.

A group of scientists has created an experimental transistor based on a conductive channel made of molybdenum disulfide (MoS2). By the way, IBM also uses molybdenum for the control electrodes of its 1,8-nm transistor. The problem with the IBM transistor is that the ends of the nanotubes need to be welded to the control electrodes, which is technologically difficult at this stage. The "Berkeley" transistor is free from this drawback, since in its design carbon nanotubes are used as independent current conductors and serve as gates.

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