Fluidic Self Assembly and Screen Printing
In this process, specially shaped "nanoblock" integrated circuits (ICs) flow through a liquid solution and are distributed across a flexible film. The surface of the film is shaped micro-embossed receptor holes into which the ICs settle. The shape of the ICs and the corresponding holes are such that the ICs fall into place and self-align, hence the term Fluidic Self Assembly. After the nanoblock ICs have been placed in the substrate web, straps are made using screen printing techniques to create large contact pads of conductive ink with electrical connection to the ICs. When a strap is coupled with an IC it usually resembles a very tiny metallic bow tie. The added strap also allows for easier handling of the very small ICs and the conductive surface area makes connecting the circuits easier and more reliable. Also see; These methods vastly increases the amount of ICs that can be processed, increasing through-put and lowering cost.
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