Crystal IS, an Asahi Kasei company, today announced the successful serial production of 100 mm diameter single-crystal aluminum nitride (AlN) substrates with 99% usable area, based on current requirements for UVC LEDs, with manufacturing to take place in the United States. The ultra-wide bandgap and high thermal conductivity of AlN help to improve device reliability and performance not only in UVC LEDs but also in next-generation RF and power devices.

“The improvement of our large diameter substrate quality over the last nine months showcases the expert…