US Patent Issued to SK hynix on April 22 for "Three-dimensional semiconductor memory device" (South Korean Inventors)

ALEXANDRIA, Va., June 6 -- United States Patent no. 12,284,808, issued on April 22, was assigned to SK hynix Inc. (Icheon-si, South Korea).

"Three-dimensional semiconductor memory device" was invented by Jang Won Kim (Icheon-si, South Korea), Mi Seong Park (Icheon-si, South Korea), In Su Park (Icheon-si, South Korea), Jung Shik Jang (Icheon-si, South Korea) and Won Geun Choi (Icheon-si, South Korea).

According to the abstract* released by the U.S. Patent & Trademark Office: "A semiconductor memory device and a method of manufacturing the semiconductor memory device are provided. The semiconductor memory device includes a gate stacked structure with a cell array region and a contact region with a stepped shape, and a roughness of a first s...