ALEXANDRIA, Va., July 15 -- United States Patent no. 12,666,662, issued on June 23, was assigned to POWER MASTER SEMICONDUCTOR Co. LTD. (Bucheon-si, South Korea).

"Semiconductor device" was invented by Chang Ju Lee (Bucheon-si, South Korea) and Dong Kook Son (Bucheon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor device is provided. A semiconductor device includes: a first semiconductor layer having an N conductivity type; and a second semiconductor layer formed on the first semiconductor layer and including an active region, a frame region, and a termination region, wherein the active region may include a plurality of first P pillars and first N pillars formed between the plu...