US Patent Issued to CRYSTAL IS on April 1 for "Aluminum nitride crystals having low urbach energy and high transparency to deep-ultraviolet wavelengths" (Japanese, American Inventors)

ALEXANDRIA, Va., April 2 -- United States Patent no. 12,264,410, issued on April 1, was assigned to CRYSTAL IS INC. (Green Island, N.Y.).

"Aluminum nitride crystals having low urbach energy and high transparency to deep-ultraviolet wavelengths" was invented by Robert T. Bondokov (Watervliet, N.Y.), James R. Grandusky (Waterford, N.Y.), Jianfeng Chen (Ballston Lake, N.Y.), Shichao Wang (Troy, N.Y.), Toru Kimura (Tokyo), Thomas Miebach (Malta, N.Y.), Keisuke Yamaoka (Tokyo) and Leo J. Schowalter (Latham, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "In various embodiments, single-crystal aluminum nitride boules and substrates have low Urbach energies and/or absorption coefficients at deep-ultraviolet wav...