ALEXANDRIA, Va., April 9 -- United States Patent no. 12,272,746, issued on April 8, was assigned to FUJI ELECTRIC Co. LTD. (Kawasaki, Japan).
"Semiconductor device" was invented by Keiji Okumura (Matsumoto, Japan).
According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor device has an active area in which a main current flows and an outer-edge area surrounding the active area. The semiconductor device includes: an n-type semiconductor layer made of a wide bandgap semiconductor; a plurality of p-type guard rings provided inside the semiconductor layer in the outer-edge area to surround the active area; and a separation region provided in a concentric ring shape in the outer-edge area to be in contact with...