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HexaTech just announced something that looks small on paper but is not small at all in context. They have officially released a 3-inch diameter single crystal aluminum nitride substrate for production. That is 76.2 mm. And in this space, size matters a lot more than it sounds.
Three inch substrates are not random. They are a transition step. The real target is 100 mm material. But you do not jump there overnight. You scale in stages. Moving from 2 inch to 3 inch is one of those milestones that tells the industry this is heading toward serious volume manufacturing. Not lab work. Not niche runs. Actual scale.
Aluminum nitride is being used for high voltage and high frequency electronic devices. These applications demand performance. Thermal management. Reliability. Consistency. If the substrate is not solid, everything built on top of it suffers. That is why single crystal PVT grown AlN matters. HexaTech has positioned itself as the leading commercial supplier in that category, and this release reinforces that stance.
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Both 2 inch and 3 inch substrates are available now with standard lead times. So this is not a future promise. It is ready.
The bigger picture is obvious. Power electronics are scaling. High frequency systems are scaling. And materials need to keep up. Larger diameter AlN is not just a technical update. It is a manufacturing signal.
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