Onto Innovation

Chipmakers need to measure and inspect their wafers at nearly every step, and Onto Innovation supplies the tools that do it. The company makes process-control equipment, systems that gauge film thickness, spot defects, and read the tiny dimensions on a wafer, plus the software that ties the data together. Its sweet spot is advanced packaging and specialty devices, the fast-growing area where chips are stacked and interconnected to feed AI and high-performance computing. Onto Innovation was created in 2019 by merging Nanometrics and Rudolph Technologies, two long-standing metrology and inspection firms, which gave it a broader product line and scale against larger rivals. Its sales rise and fall with the semiconductor capital-spending cycle, though the packaging focus has lent it a distinct growth angle lately. The company is based in Wilmington, Massachusetts.

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