ALEXANDRIA, Va., June 16 -- United States Patent no. 12,308,324, issued on May 20, was assigned to Winbond Electronics Corp. (Taichung, Taiwan).
"Overlay mark" was invented by Kuang-Chung Lee (Taichung, Taiwan).
According to the abstract* released by the U.S. Patent & Trademark Office: "Provided is an overlay mark including a first pattern and a second pattern. The first pattern includes a plurality of first strip shapes and a plurality of first dot shapes. The plurality of first strip shapes extend along a first direction and are arranged in parallel along a second direction. The plurality of first dot shapes are respectively disposed between the plurality of first strip shapes. The second pattern includes a plurality of second strip sha...