Patent ID: 6235590
Filing Date: 2001-05-22
Classification: H01L

Abstract:
A method of fabricating an integrated circuit, the method comprising:forming a first oxynitride layer on a surface of a substrate in an ambient comprising a nitrogen-containing gas at a pressure of a least 2.0 atmospheres;etching a portion of the first oxynitride layer to expose a portion of the substrate surface; andsubsequently forming a second oxynitride over the surface of the semiconductor in an ambient comprising a nitrogen-containing gas at a pressure of a least 2.0 atmospheres, wherein the second oxynitride layer overlaps at least a portion of the first oxynitride to form a combined first insulating layer of a first thickness, and wherein a portion of the second oxynitride layer is formed on the semiconductor surface to form a second insulating layer having a second thickness less than the first thickness.