ALEXANDRIA, Va., July 14 -- United States Patent no. 12,684,775, issued on July 14, was assigned to SK hynix Inc. (Icheon-si, South Korea).

"Semiconductor memory device and manufacturing method of the semiconductor memory device" was invented by Jae Taek Kim (Icheon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "There are provided a semiconductor memory device and a manufacturing method of the semiconductor memory device. The semiconductor memory device includes a stack structure including interlayer insulating layers and conductive layers, which are alternately stacked therein; and a plurality of contact plugs formed vertically on the conductive layers. The stack structure is configured to h...