ALEXANDRIA, Va., Sept. 23 -- United States Patent no. 12,422,699, issued on Sept. 23, was assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD. (Hsinchu, Taiwan).

"Optical modulator and method of forming the same" was invented by Chih-Tsung Shih (Hsinchu, Taiwan), Feng Yuan (Hsinchu, Taiwan), Wei-Kang Liu (Taichung, Taiwan) and Yingkit Felix Tsui (Cupertino, Calif.).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes receiving a silicon substrate; forming a first doped region and a second doped region in the silicon substrate; forming a third doped region and fourth doped region on upper portions of the first doped region and the second doped region, respectively; and patterning the silicon...