New Scientist reports ink drops sliding down a microscopic ridge, like water running off a roof, can boost the speed of printed transistors for flexible electronics The new technique cut the overlap in the final transistor to just 0.78 micrometres, a 10-fold improvement on the previous all-printed techniques and comparable to the figures obtained by using photolithography to clean up after printing.
Without final tuning printed electronic transistors tend to perform poorly, says Huai-Yuan Tseng at the University of California, Berkeley, who with colleague Vivek Subramanian has developed a more accurate way of printing transistors, without resorting to extra processing. Tseng says their method is the first to abandon traditional etching altogether.
The problem is that ink cannot be squirted accurately enough to prevent the three electrodes in a field-effect transistor from being too close together. The source and drain are arranged in a line and printed on one layer while the third, the gate, is printed on a different layer, separated by a nanoscale insulator.
In printed transistors the source and drain can vertically overlap the gate by 10 micrometres or more, allowing electric fields from the gate electrode to couple with the other electrodes and impair performance. The larger the overlap between gate and the source and drain, the larger the parasitic capacitance, and hence the slower the transistors are.
Wang is a prolific business-oriented writer of emerging and disruptive technologies. He is known for insightful articles that combine business and technical analysis that catches the attention of the general public and is also useful for those in the industries. He is the sole author and writer of nextbigfuture.com
, the top online science blog. He is also involved in angel investing and raising funds for breakthrough technology startup companies.
He gave the recent keynote presentation at Monte Jade event with a talk entitled the Future for You. He gave an annual update on molecular nanotechnology at Singularity University on nanotechnology, gave a TEDX talk on energy, and advises USC ASTE 527 (advanced space projects program). He has been interviewed for radio, professional organizations. podcasts and corporate events. He was recently interviewed by the radio program Steel on Steel on satellites and high altitude balloons that will track all movement in many parts of the USA.
He fundraises for various high impact technology companies and has worked in computer technology, insurance, healthcare and with corporate finance.
He has substantial familiarity with a broad range of breakthrough technologies like age reversal and antiaging, quantum computers, artificial intelligence, ocean tech, agtech, nuclear fission, advanced nuclear fission, space propulsion, satellites, imaging, molecular nanotechnology, biotechnology, medicine, blockchain, crypto and many other areas.