Patent ID: 6436847
Filing Date: 2002-08-20
Classification: H01L,Y10S

Abstract:
A method of forming an electronic device comprising:providing a first electrode and an oxide layer laterally proximate thereof over a substrate wherein providing the oxide layer laterally proximate the first electrode comprises providing a doped oxide layer; forming a first nitride layer over substantially all of both the oxide layer and the first electrode to a thickness of no greater than 80 Angstroms wherein forming the first nitride layer comprises first exposing the doped oxide layer to rapid thermal nitridation conditions effective to grow a seed nitride layer over at least the doped oxide layer to a thickness of at least about 8 Angstroms; forming a second nitride layer over the first nitride layer by low pressure chemical vapor deposition, the forming using a set of reactor conditions comprising a silicon hydride and ammonia feed gases, the second nitride layer being formed to provide, with the first nitride layer, a combined nitride layer thickness of no greater than 80 Angstroms over the first electrode wherein the forming of the second nitride layer comprising forming silicon nitride over both the seed nitride layer and the first electrode, the low pressure chemical vapor deposition comprising a pressure of less than 1 Torr, and a temperature of at least 700Â° C.; exposing the substrate to oxidizing conditions comprising at least 700Â° C. to form a silicon dioxide layer over the first and second nitride layers, with the thickness of nitride over the oxide layer being sufficient to shield oxidizable substrate material beneath the oxide layer from oxidizing during the exposing; and forming a second electrode over the silicon dioxide layer and the first electrode.