ALEXANDRIA, Va., Oct. 8 -- United States Patent no. 12,439,661, issued on Oct. 7, was assigned to PANASONIC INTELLECTUAL PROPERTY MANAGEMENT Co. LTD. (Osaka, Japan).

"Semiconductor device" was invented by Hiroto Yamagiwa (Hyogo, Japan), Manabu Yanagihara (Osaka, Japan), Takahiro Sato (Toyama, Japan), Masahiro Hikita (Hyogo, Japan), Hiroaki Ueno (Osaka, Japan) and Yusuke Kinoshita (Kyoto, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor device includes: a substrate; a first nitride semiconductor layer above the substrate; a second nitride semiconductor layer above the first nitride semiconductor layer and being greater than the first nitride semiconductor layer in band gap; and a first fie...