ALEXANDRIA, Va., Sept. 30 -- United States Patent no. 12,427,604, issued on Sept. 30, was assigned to DISCO Corp. (Tokyo).
"Processing method and processing apparatus for ingot" was invented by Asahi Nomoto (Tokyc, Japan), Yujiro Sudo (Tokyo), Kazuya Hirata (Tokyo) and Kunimitsu Takahashi (Tokyo).
According to the abstract* released by the U.S. Patent & Trademark Office: "An ingot is processed by applying exciting light, and detecting fluorescence occurring from an upper surface of the ingot. A distribution of the number of photons of the fluorescence on the upper surface of the ingot is stored as two-dimensional data in association with XY coordinate positions, and a Z-coordinate position at which the two-dimensional data is obtained is ...