Patent ID: 8912061
Filing Date: 2014-12-16
Classification: H01L

Abstract:
1. A method for forming a floating gate device, comprising: forming a tunnel oxide layer over a channel; forming a floating gate over the tunnel oxide layer; forming a high-k dielectric layer over the floating gate; forming a control gate over the high-k dielectric layer, the control gate comprising an oxygen scavenging element; wherein the floating gate device is formed of the tunnel oxide layer, the floating gate, the high-k dielectric layer, and the control gate; wherein forming the floating gate device causes a first native oxide layer at a first interface between the control gate and the high-k dielectric layer and causes a second native oxide layer at a second interface between the high-k dielectric layer and the floating gate; after the floating gate device has been formed by the tunnel oxide layer, the floating gate, the high-k dielectric layer, and the control gate, annealing the floating gate device in order to decrease by the oxygen scavenging element an oxygen density at, at least one of, the first native oxide layer at the first interface between the control gate and the high-k dielectric layer and the second native oxide layer at the second interface between the high-k dielectric layer and the floating gate.