Patent ID: 7510935

Claim:
A method of manufacturing a charge-trapping dielectric, the method comprising: preparing a first oxide layer including silicon oxide; forming a silicon nitride (Si x N y ) layer on the first oxide layer by a cyclic chemical vapor deposition (CVD) process using a silicon source material and a nitrogen source gas, wherein a composition ratio (x/y) of silicon with respect to nitrogen in the silicon nitride layer is in a range of about 0.7 to about 1.5, in which forming the silicon nitride layer comprises introducing the silicon source material in a gaseous state onto the first oxide layer; chemisorbing the silicon source material onto a surface of the first oxide layer; removing residual silicon source material that is not chemisorbed onto the surface of the first oxide layer; introducing the nitrogen source gas onto the first oxide layer; and forming a preliminary silicon nitride layer by a chemical reaction between the nitrogen source gas and the chemisorbed silicon source material; and forming a second oxide layer on the silicon nitride layer.