Patent ID: 7488694
Filing Date: 2009-02-10
Classification: C23C,H01L

Abstract:
1. A method for forming a silicon nitride layer comprising: introducing a silicon source comprising hexachlorodisilane into a reactor to chemically react at least a portion of the silicon source with a surface of a substrate; introducing a first purge gas into the reactor to remove an unreacted silicon source from the substrate; introducing an activated nitrogenous compound into the reactor to form a silicon nitride layer on the substrate by chemically reacting the activated nitrogenous compound with the chemically reacted silicon source, wherein the activated nitrogenous compound comprises a hydrazine compound, an amine compound or mixture thereof; and introducing a second purge gas into the reactor to remove an unreacted activated nitrogenous compound from the substrate, wherein the silicon nitride layer has a refractive index in a range of about 1.7 to about 2.3.