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Keystone and FormFactor discuss optical probing acquisition with EPIC

Philipp Dietrich, CEO Keystone Photonics

In December 2025, US company FormFactor, a leading semiconductor test and measurement supplier, acquired the German startup Keystone Photonics, a pioneer in optical probing technology for silicon photonics and co-packaged optics wafer testing. (Image: Keystone Photonics)

FormFactor CEO Philipp Dietrich and Keystone Manager Kainoa Kekahuna explain how joining forces enables high-volume silicon photonics testing for AI infrastructure

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