ALEXANDRIA, Va., July 14 -- United States Patent no. 12,685,129, issued on July 14, was assigned to SK hynix Inc. (Icheon-si, South Korea).

"Semiconductor device and method of manufacturing semiconductor device" was invented by Sung Wook Jung (Icheon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor device may include a gate structure including conductive layers and insulating layers that are alternately stacked and including a stair structure for exposing at least one of the conductive layers, a contact plug that extends through the gate structure and that is electrically connected to a uppermost conductive layer that is exposed by the stair structure, and insulating spacers tha...