ALEXANDRIA, Va., Feb. 24 -- United States Patent no. 12,560,763, issued on Feb. 24, was assigned to INTERNATIONAL BUSINESS MACHINES Corp. (Armonk, N.Y.).

"Embedded SiGe optical waveguide with low defectivity" was invented by Stephen W. Bedell (Wappingers Falls, N.Y.), Jason S. Orcutt (Katonah, N.Y.), Abram L Falk (Port Cheste, N.Y.), Chi Xiong (Yorktown Heights, N.Y.), Cihan Kurter (White Plains, N.Y.) and Ashutosh Rao (White Plains, N.Y.).

According to the abstract* released by the U.S. Patent & Trademark Office: "Devices and/or methods of fabrication facilitating suppression of embedded SiGe optical waveguides with low defectivity are provided. In an embodiment, a device can comprise a substrate comprising a trench within the substrate,...