Under a microscope, they look like ants. Tiny black rectangles scurrying about, twitching back and forth and then settling into precise alignment, as if headed for a picnic. In truth, each of those twitching dots is a computer chip — a “chiplet,” as Eugene Chow, the project leader, likes to call them. The patterns they form represent a new way to create computer circuits — not composed of one large computer chip but many small chiplets, guided into place with electrostatic forces. “It’s elect...