ALEXANDRIA, Va., Aug. 12 -- United States Patent no. 12,389,635, issued on Aug. 12, was assigned to TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD. (Hsinchu, Taiwan) and NATIONAL TAIWAN UNIVERSITY (Taipei, Taiwan).

"Semiconductor device and manufacturing method thereof" was invented by Chien-Te Tu (Hsinchu, Taiwan) and Chee-Wee Liu (Taipei, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method includes forming an epitaxial stack over a semiconductor substrate, wherein the epitaxial stack comprises a plurality of sacrificial layers and a plurality of channel layers alternately arranged over the semiconductor substrate, and each of the sacrificial layers is a multi-layer film comprising a bottom epita...