It's already possible to make circuitry that flexes and can even roll up like a scroll. What's not yet available are circuits that can conform to more-complicated surfaces, like robotic bodies and eyeball-shape cameras.
Pai-Hui I. Hsu and her colleagues at Princeton University now report taking steps toward that goal. Aiming to make a circuit that could fit closely to a spherical lens, the investigators used ordinary microcircuit-fabrication methods to pattern arrays of silicon-based transistors onto a flat sheet of polyimide plastic that they then deformed to give it a bowl-like shape. They describe the work in the Aug. 26 Applied Physics Letters.