Fast 3D Printing: One‑Shot Micro‑Structures

A team at the University of Utah has made a new way to print tiny objects in about twenty seconds. Instead of building up layers, they use a single laser exposure to harden the whole shape at once. The method comes from photolithography, a process that patterns light with a special mask. A thin film of the material SU‑8 is placed in front of a laser. The mask shapes the light so only the desired volume turns solid when it hits the film. After the laser stops, the remaining liquid can be washed away, leaving a solid piece. Because the whole object is made in one go, there are no weak seams that usually appear between layers.

However, the printer can only control width and length in one plane; it then builds thickness from that shape. So it works best for objects that look the same in every cross‑section. The first tests showed arrays of microtubes and lattice patterns. These are useful for lab experiments where small parts must carry fluid or resist pressure. The technology is not yet ready for everyday desktop printers that make toys or household items. Researchers aim to add true three‑dimensional control while keeping the fast printing speed. If they succeed, this could become a powerful tool for making tiny parts in manufacturing.

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