ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,378,693, issued on Aug. 5, was assigned to SILTRONIC AG (Munich).
"Crystal piece of monocrystalline silicon" was invented by Sergiy Balanetskyy (Freiberg, Germany), Toni Lehmann (Oederan, Germany), Karl Mangelberger (Ach, Austria) and Dirk Zemke (Ach, Austria).
According to the abstract* released by the U.S. Patent & Trademark Office: "A crystal piece of monocrystalline silicon suitable for the production of semiconductor wafers has a length of not less than 8 cm and not more than 50 cm and a diameter of not less than 280 mm and not greater than 320 mm, wherein the fraction of the semiconductor wafers produced therefrom that are free from pinholes having a size of not more than 30 mic...