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He found work at a nearby Hewlett-Packard campus, helping design the printhead that transfers ink to the page on inkjet printers.

There are several types of inkjet delivery systems, but most consumer systems use separate ink cartridges, each fitted with a printhead that separates the ink into the nearly microscopic droplets.

Here, four types of printable fluid are fed from reservoirs fixed into the transparent printhead.

This printhead contains a 4 × 4 array of nozzles.

Work will also be needed to increase the flexibility of the technology, by making it possible to independently program the flow through each nozzle in a printhead, as is the case for inkjet-based methods.