Onto Innovation Inc. plays a low-profile but foundational role in the semiconductor manufacturing chain. Based in Wilmington, Massachusetts, this American company does not design the processors that power computers: it supplies some of the instruments that enable their reproducible manufacture. Its equipment and software are used to measure structures, identify defects and analyze production data, from wafer fabrication stages through to advanced packaging.
A company born from the merger of two specialists
Onto Innovation was created in 2019 through the merger of Nanometrics and Rudolph Technologies, two American suppliers of equipment for the semiconductor industry. The merger brought together complementary expertise, notably Nanometrics’ optical metrology and Rudolph Technologies’ inspection, lithography and software operations. The company is listed on the New York Stock Exchange under the ticker symbol ONTO.
This background explains its broad positioning. Rather than focusing on a single operation, Onto Innovation offers several building blocks for process control. It serves integrated circuit manufacturers as well as companies specializing in component assembly and packaging.
Measuring, inspecting and connecting manufacturing data
Metrology is one of the main pillars of its business. Its optical systems characterize, among other things, structural dimensions and thin-film properties, without necessarily destroying the samples being analyzed. These measurements help verify that processes remain within the expected parameters. Their value increases as architectures become more complex and tolerances tighten.
Inspection, meanwhile, aims to detect and characterize defects that could affect component performance or reliability. Onto Innovation is also active in lithography for advanced packaging, where the patterns needed for interconnections must be created. This field is growing in importance as multiple chips are assembled within a single package.
Software complements this equipment by organizing the analysis of measurement and inspection data. For manufacturers, the challenge is to identify the source of process drift more quickly, limit losses and stabilize yields. The supplier’s value therefore rests as much on the quality of its measurements as on their integration into production workflows.
What comes next?
The development of chiplets, high-bandwidth memory and components intended for artificial intelligence is increasing the need for control in advanced packaging. These developments create market opportunities for Onto Innovation, without eliminating the cyclical nature of semiconductor manufacturers’ investments.
Its trajectory will depend on its ability to keep pace with new architectures, secure qualification for its equipment and demonstrate its economic value in production. In an industry where a localized defect can compromise a costly assembly, precision control remains a tangible industrial concern.