Prof. Sunghoon Kwon
Seoul National University, Korea
December 16, 2009 | 12:30 to 01:30 | 521 Cory Hall, Hogan Room
Host: N/A
There are two different fabrication methods for building complex micro devices: top-down and bottom-up. The top-down approach, based on conventional photolithography, has given us amazing CMOS manufacturing capabilities but it's facing a fundamental limit in its downward scalability. Recently, various bottom-up manufacturing technologies have gained notice for their ability to overcome limits of top-down manufacturing. Breakthroughs will result from marrying top-down technique such as lithography and bottom-up technique such as self-assembly. Moving past the mundane introduction, what I really want to talk about is "Smart Scalable Systems," a radical bottom-up point of view for building complex systems. It seeks to construct a complex system by self-assembly of many simpler components, like a mosaic or a collage in art. Instead of building a system monolithically, it scalably assembles lots of small parts that are manufactured separately in large quantity to build up complex systems such as biosensors, energy sources, and displays. In this seminar optofluidic maskless lithography will be presented as a first step for smart particle generation. Secondly, various fluidic self-assembly technologies such as railed microfluidics will be discussed as a smart particle assembly method. Then I will give a road map of application examples such as encoded particle based scalable biosensors, LED chip packaging, scalable energy sources and scalable displays. Finally, I will end with an innovative method of artificially mimicking nature's various structural colors as a first step to scalable display. By creatively combining OFML and magnetic self-assembly, we demonstrated full color printing of artificial structural color using a single material.
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