Over the years, engineers have been looking the finish line in the race to reduce the size of elements in integrated circuits. They are aware that the laws of physics had grounded a 5-nanometer threshold on the total size of transistor gates among traditional semiconductors, around one-quarter the size of high-end 20 nanometer gate transistors now on the arena.
But as researched by a team of experts under the guidance of faculty researcher Ali Javey at the Department of Energy’s Lawrence Berkeley National Laboratory, they have created the smallest transistor with just a single working 1-nanometer gate that can be compared to a human hair strand, which is just 50,000 nanometers thick.
“We created the tiniest transistor till date,” says Javey, head principal investigator of the Electronic Materials group in Berkeley Lab’s Materials Science Division. “The length of the gate is deemed a defining layer of the transistor. We illustrated a 1-nanometer gate transistor, revealing that with the selection of proper substances, there is a big space to shrink our electronics.”
The idea was to use molybdenum disulfide and carbon nanotubes, a lubricant in the engine of materials with great potential for utility in lasers, LEDs, solar cells, nanoscale transistors and more. Other experts associated with this study are a lecturer at UC Berkeley, scientists at Berkeley Lab, a lecturer at the University of Texas at Dallas and a lecturer at Stanford University.
The introduction could be the aim to keep alive expectation of Intel’s co-founder Gordon Moore that the volume of transistors on integrated circuits would get doubled up in every two years, allowing the enhanced performance of mobile phones, laptops, televisions and other sorts of electrical equipment.
“It has been long assumed by the semi-conductor industry that any gate, which is less than 5 nanometers would not work well, so it is of no use considering anything below that,” says Sujay Desai, the lead author of the study. “This study reveals that sub 5-nanometer gates must not be ignored. The industry has been shrinking every last bit of potential out of silicon. By altering the substance from silicon to molybdenum, we can create a transistor with a single gate that is only 1 nanometer in length and function as a switch.”
The tem decided to use MoS2 as the semiconductor substance and stepped further to create a 1-nanometer structure. The researchers opted for carbon nanotubes and hollow cylindrical tubes with dimensions as tiny as 1 nanometer. After this, they estimated the electrical properties of the gadgets to reveal that carbon based nanotube gate with MoS2 transistor could efficiently regulate the electrons flow.
According to Javery, this work presents the shortest transistor produced ever. But he also confirms that “a proof of methodology. We have not still packed such transistors onto a single chip, and we have not performed it billions of time over. We also have not introduced self-aligned schemes for fabrication for diminishing parasitic resistances in gadgets. But such work is vital to reveal that we are no longer constrained to a 5-nanometer gate for our transistors. The law of Moore can begin a much longer by adequate engineering of the device architecture and semiconductor substance.”
Filed Under: News