ALEXANDRIA, Va., Aug. 6 -- United States Patent no. 12,382,840, issued on Aug. 5.
"Damascene MRAM device" was invented by Koichi Motoyama (Clifton Park, N.Y.), Oscar van der Straten (Guilderland Center, N.Y.) and Chih-Chao Yang (Glenmont, N.Y.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A magnetic tunnel junction (MTJ) stack, a vertical side surface of the MTJ stack includes a saw tooth edge, the MTJ stack includes vertically aligned layers of a top electrode, a free layer, a tunneling barrier, a reference layer and a bottom electrode, the free layer of the MTJ stack has a tapered edge including a first width at an upper portion of the free layer and a second width at a lower portion of the free layer, th...