In this paper, we present carbon nanofiber (CNF)-based capacitors in a MIM configuration, a CNF-MIM, with a small footprint, low profile height, and high capacitance density that can be used both as integrated and as discrete component. Being produced in a fully CMOS compatible process it is likely to play a major role as further miniaturization of future electronics moves on. The devices were characterized from 25 °C to 150 °C and from 0 V to 5 V. It was demonstrated that a CNF-MIM with a total CNF height of 6 μm achieved a capacitance density of about 400 nF/mm2. Also shown was an ESR of about 45 mΩ. It was found that the capacitance increased slightly with temperature by 0.03−0.06 %/K and that the capacitance was stable for biasing voltage with an increase between 0.5−4 %/V. Hence, it meets well with the X7R specifications. This behavior makes it a good competitor compared to MLCCs whose capacitance decreases with temperature and applied voltage and the CNF-MIM does this at the fraction of the device thickness of the MLCC.
Smoltek holds unique world patents for technologies that make material engineering on an atomic level possible. Smoltek has solutions that allow continued miniaturization and increased performance of semiconductors, contribute to carbon-free steel production and renewable energy storage, and enable mind control of robotic prostheses. This is a story of how Smoltek came to be.
This is the third and last article in a series of three in which Smoltek founder and strategic advisor Shafiq Kabir share his personal thoughts on nanotechnology opportunities. In the previous two articles, he has addressed both the hype and the reality of carbon nanotechnology. In this last article, he looks into the future. He discusses how carbon nanotechnology will unleash the power of the internet of everything.