Patent ID: 8637921
Filing Date: 2014-01-28
Classification: H01L

Abstract:
1. A nonvolatile trapped-charge memory device, comprising: a tunneling layer on a substrate, a charge trapping layer on the tunneling layer, wherein the charge trapping layer comprises an oxygen-rich oxynitride to form a SONOS-type device, and a blocking layer on the charge trapping layer, wherein the tunneling layer thickness is no greater than 2.5 nm and further comprises: wherein the nitrogen concentration decreases from a first interface between the second region and the charge trapping layer to the middle region, and from the middle region to a second interface between the first region and the substrate to reduce nitrogen and hydrogen trap density at the second interface, and wherein the middle region and the second region comprising approximately 75% of the tunneling layer, the second region comprises a nitrogen concentration that is at least 1×10