Patent ID: 6265295
Filing Date: 2001-07-24
Classification: H01L

Abstract:
A method for creating openings for metal contact plugs in a layer of Dielectric of a semiconductor device, comprising the steps of:providing a semiconductor substrate;forming a gate electrode structure on the surface of said substrate, leaving the surface of said substrate partially exposed;depositing a first layer of dielectric over said gate electrode structure and the exposed surface of said substrate, then;depositing a second layer of dielectric comprising PETEOS over said first layer of dielectric, then;depositing a stop layer comprising SiON over the surface of said second layer of dielectric; and thenapplying a Rapid Thermal Anneal by applying a temperature between about 900 and 1100 degrees C. for a time period of between about 10 and 60 seconds to the surface of said stop layer, creating an annealed stop layer.