ALEXANDRIA, Va., June 17 -- United States Patent no. 12,315,564, issued on May 27, was assigned to Kioxia Corp. (Tokyo).

"Semiconductor memory device" was invented by Kazuhiro Nojima (Mie, Japan) and Kohei Yuki (Yokkaichi, Japan).

According to the abstract* released by the U.S. Patent & Trademark Office: "According to one embodiment, a semiconductor memory device includes a stacked layer body including conductive and insulating layers alternately stacked in a first direction, partition structures each extending in first and second directions in the stacked layer body, and an intermediate structure extending from an upper end and terminating at a position between upper and lower ends of the stacked layer body between adjacent partition str...