Japanese chemical company Tokuyama is building a new aluminum nitride powder line in Yanai, Japan, adding about 30% to its capacity by April 2028.
Wait, what's aluminum nitride?
If it sounds familiar, we covered Ube's silicon nitride expansion in 2023. Aluminum nitride pairs one aluminum with each nitrogen (AlN, versus Si₃N₄), and the result is a ceramic that moves heat much better but is less strong. It goes into the parts that hold and heat wafers in chipmaking tools, power-electronics substrates and heat-dissipating fillers, mostly competing with cheaper alumina. Tokuyama cites AI chip demand; maybe hotter, newer chips need the better heat handling, but I don't really know.
Market size, for perspective:
We talk a lot about 1,000 KTA ethylene crackers here. Aluminum nitride, despite showing up all over chipmaking, is a drop in the bucket. Tokuyama stopped publishing tonnage after its last expansion took it from 0.6 to 0.8 KTA in 2020, so another 30% puts it around 1 KTA. It claimed about 75% of the world market in 2019, and Chinese producers have added hundreds of tons a year since, so the whole world probably makes something like 2–5 KTA.