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FormFactor, Inc.

FormFactor makes the special probes and test systems that check whether computer chips work before they are sold.

FormFactor sells the picks and probes of the computer chip world. Every chip, from the one in your phone to the one in a data center, has to be tested before it ships. FormFactor makes the tiny probe cards and measurement systems that physically touch a finished chip wafer, send it electrical signals, and check whether each chip actually works. If the chip is dead, you want to know before you spend money packaging it. The company sells mainly to chipmakers and the big test-and-assembly factories, mostly in Asia. Two segments drive the business: probe cards, which are the thin, custom-made cards covered in thousands of microscopic needles, and systems, which are the larger machines used for measuring and testing wafers at higher volumes. Probe cards are the bigger and steadier piece, roughly two-thirds of revenue, while systems bring in the rest and tend to swing more with big equipment-buying cycles.

Think of it as the quality inspector at the end of a factory line, except the inspector is a piece of hardware so precise it can poke a feature thousands of times thinner than a human hair. That precision is the moat. Customers do not switch probe card suppliers casually, because a bad card means wasted chips and lost time. FormFactor grew partly by buying rivals, including Cascade Microtech and Advantest's probe card business, which broadened its reach into measurement systems and key customers. The company was founded in 1993 and went public in 2003. Today the biggest tailwind is artificial intelligence. AI chips are large, expensive, and power-hungry, and they need far more testing and more advanced probes than ordinary chips, because a single bad chip in a data center is costly. That is pushing demand for both its probe cards and its newer high-power test systems.

FormFactor generates real cash and mostly plows it back into the business, funding research and development and occasional acquisitions rather than paying a dividend. It does buy back some stock, though not enough to meaningfully shrink the share count most years. The business is cyclical, meaning sales rise and fall with chipmaker spending, so a booming quarter can be followed by a soft one. The key thing to watch is whether the AI and advanced-packaging wave keeps pulling customers toward more, and more complex, testing. If chips keep getting bigger and more expensive, the inspection job gets more important, and that is the corner FormFactor wants to own.

Saved answer · last researched 13 Oct 2026