Foresight Nanotech Institute Logo

« Go Back

You are viewing
Foresight Archives

Image of nano

Nanofabrication of Unijunction Transistors
based on Metallophthalucyanines

K.O. Park

K.O. Park

This is an abstract for a poster to be presented at the
Fifth Foresight Conference on Molecular Nanotechnology.
The full paper is available here.


In the previous thought experiment, the electrical conductivity of N-channel Depletion-Type MOSFET's with metal containing phthalocyanine LB (Langmuir-Blodgett) films was presented. In this thought experiment, the electrical conductivity modulation of unijunction transistors (UJT) based on metallophthalocyanines, such as CuPc, PbPc, and Cu(PcF8)/NiPc, which are deposited onto P+ region of a Si-substrate is described. The three different kinds of unijunction transistors could be fabricated using an imprint nanolithography and a sublimed method along with a conventional microelectronic fabrication technique. They are called MPc unijunction transistors, denoted by MPc UJT (M=Pb, Cu) and by Cu(PcF8)/NiPc UJT, where Cu(PcF8)/NiPc is a bilayer to be deposited onto P+ region of a Si substrate. A switching voltage of Cu (PcF8)NiPc unijunction transistor (UJT) to be fabricated from this experiment could be larger than that of a conventional unijunction transistor due to large forward diode drop (about 2V or more) from a bilayer of Cu(PcF8)NiPc of the P+ region in Cu(PcF8)/NiPc UJT.

It is also expected that the switching voltages of CuPc UJT and PbPc UJT to be fabricated by doping with NO2 would be smaller than those of CuPc UJT and PbPc UJT to be fabricated by doping with O2. The switching time of the fabricated UJT from this work would be smaller than that of a conventional UJT adjusting the length from the P+ region to the source.

A unijunction transistor with a property of an S-shaped curve (Input vs. Output), which would be useful for neural network, could also be fabricated from this experiment.

*Corresponding Address:
K.O. Park Ph.D., All Rights Reserved.
For comments please contact


Foresight Programs


Home About Foresight Blog News & Events Roadmap About Nanotechnology Resources Facebook Contact Privacy Policy

Foresight materials on the Web are ©1986–2018 Foresight Institute. All rights reserved. Legal Notices.

Web site developed by Stephan Spencer and Netconcepts; maintained by James B. Lewis Enterprises.