ALEXANDRIA, Va., March 19 -- United States Patent no. 12,254,645, issued on March 18, was assigned to FEI Co. (Hillsboro, Ore.).
"Shape invariant method for accurate fiducial finding" was invented by Umesh Adiga (Portland, Ore.) and Mark Biedrzycki (Beaverton, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Fiducial coordinates are obtained by aligning template with region of interest extracted from a workpiece image. Image values in the region of interest are projected along a template axis and the project values evaluated to establish a fiducial location which can be used as a reference location for locating workpiece areas for ion beam milling or other processing."
The patent was filed on Dec. 3, 202...