US Patent Issued to United Microelectronics on Sept. 1 for "Method for forming alignment keys of semiconductor structure and semiconductor structure having alignment keys" (Taiwanese Inventors)

ALEXANDRIA, Va., Sept. 1 -- United States Patent no. 12,727,485, issued on Sept. 1, was assigned to United Microelectronics Corp. (Hsinchu, Taiwan).

"Method for forming alignment keys of semiconductor structure and semiconductor structure having alignment keys" was invented by Tsung-Yu Yang (Chiayi County, Taiwan), Shin-Hung Li (Nantou County, Taiwan), Shan-shi Huang (Hsinchu City, Taiwan), Ruei Jhe Tsao (New Taipei City, Taiwan), Che-Hua Chang (New Taipei City, Taiwan) and Yuan Yu Chung (Tainan City, Taiwan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A method for forming alignment keys of a semiconductor structure includes: forming an oxide pad layer and a passivation layer on a substrate; forming a patt...