摘要:
Apparatus and process for conditioning a substrate, contained in a hermetically sealed chamber fed with a conditioning gas which includes a reactive gas, the apparatus including a support for supporting the substrate in the chamber, the substrate being in a lower pressure reaction region of the chamber. A gas inlet is provided for feeding conditioning gas into a gas inlet region of the chamber which is at a higher pressure than the lower pressure reaction region so that the pressure differential causes the conditioning gas to flow toward the surface of the substrate wherein the conditioning gas component will chemically react with and condition the substrate surface, both said higher and lower pressure regions operating in a viscous flow regime. The substrate is supported such that a pressure bias is created across the surface of the substrate such that the gas, after it has chemically reacted with the substrate surface, flows radially outward from where it has reacted, toward the nearest edge of the substrate and out an exhaust outlet.
摘要:
A method for removing native oxides and other contaminants from a wafer surface while minimizing the loss of a desired film on the wafer surface. The method is carried out in a hermetically sealed reactor. A fluorine-containing gas or gas mixture is passed over the wafer during simultaneous exposure to ultraviolet radiation in the absence of added water, hydrogen, hydrogen fluoride or hydrogen containing organics, thereby avoiding the production of water as a reaction product. The addition of ultraviolet radiation and the elimination of water, hydrogen, hydrogen fluoride and hydrogen containing organics provides for the nearly equivalent (non-selective) removal of various forms of oxide and also provides for improved process control.
摘要:
A UV light-enhanced process for rapidly stripping films of silicon nitride in a dry reaction environment, which may be free of plasma or plasma effluents. This process is carried out in a sealed reactor which allows simultaneous exposure of a substrate wafer to a polyatomic fluorine containing gas which can be photodissociated by UV radiation to produce atomic fluorine and to UV radiation. Silicon nitride stripping rates in excess of 500 .ANG./min are readily obtainable with UV-stimulated fluorine-based processes, while maintaining the bulk wafer temperature below 300.degree. C. Selectivities for silicon nitride-to-silicon oxide etching of greater than 30 can be achieved for the stripping of silicon nitride LOCOS mask layers in the presence of field oxide and pad oxide layers when a chlorine or bromine containing gas which can be photodissociated by UV radiation to produce atomic chlorine or bromine is used in mixture with the fluorine containing gas. Selectivity and etch rate are controlled through UV lamp exposure, substrate temperature, and additions of nitrogen diluent, and photodissociable chlorine or bromine containing gases. The process addresses many of the limitations of plasma-downstream etch tools for dry silicon nitride stripping, including complete elimination of charged particles and sputtered contaminants associated with plasma effluents.
摘要:
Apparatus and process for conditioning a generally planar substrate, contained in a chamber isolatable from the ambient environment and fed with a conditioning gas which includes reactive gas. The apparatus includes a support for supporting the substrate in the chamber, the substrate being in a lower pressure reaction region of the chamber. A gas inlet is provided for feeding conditioning gas into a gas inlet region of the chamber which is at a higher pressure than the lower pressure reaction region so that the pressure differential causes the conditioning gas to flow toward the surface of the substrate wherein the conditioning gas component will chemically react with and condition the substrate surface, both said higher and lower pressure regions operating in a viscous flow regime. The substrate is supported such that a pressure bias is created across the surface of this substrate so that the gas, after it has chemically reacted with the substrate surface, flows outward from where it has reacted, off the substrate toward the periphery of the chamber and out a peripheral or central underside exhaust outlet. Gas feed may be provided to one or both sides the substrate and light activation of the substrate or conditioning gas may be provided on one or both sides.
摘要:
A method for removing native oxides and other contaminants from a wafer surface while minimizing the loss of a desired film on the wafer surface. The method is carried out in a hermetically sealed reactor. A fluorine-containing gas or gas mixture is passed over the wafer during simultaneous exposure to ultraviolet radiation in the absence of added water, hydrogen, hydrogen fluoride or hydrogen containing organics, thereby avoiding the production of water as a reaction product. The addition of ultraviolet radiation and the elimination of water, hydrogen, hydrogen fluoride and hydrogen containing organics provides for the nearly equivalent (non-selective) removal of various forms of oxide and also provides for improved process control.
摘要:
Apparatus and process for conditioning a generally planar substrate, contained in a chamber isolatable from the ambient environment and fed with a conditioning gas which includes a reactive gas. The apparatus includes a support for supporting the substrate in the chamber, the substrate being in a lower pressure reaction region of the chamber. A gas inlet is provided for feeding conditioning gas into a gas inlet region of the chamber which is at a higher pressure than the lower pressure reaction region so that the pressure differential causes the conditioning gas to flow toward the surface of the substrate wherein the conditioning gas component will chemically react with and condition the substrate surface, both said higher and lower pressure regions operating in a viscous flow regime. The substrate is supported such that a pressure bias is created across the surface of the substrate so that the gas, after it has chemically reacted with the substrate surface, flows outward from where it has reacted, off the substrate toward the periphery of the chamber and out a peripheral or central underside exhaust outlet. Gas feed may be provided to one or both sides of the substrate and light activation of the substrate or conditioning gas may be provided on one or both sides.
摘要:
UV irradiation enhances oxidation of metal and/or formation of sublimable ligand compounds using beta-diketone or beta-ketoimine ligand forming compounds. A UV/halogen gas or UV/ozone treatment can be used to efficiently oxidize the metallic material to a suitable form for reaction with the ligand forming compound and UV irradiation can be used during exposure to the ligand forming compound to enhance the formation of sublimable ligand compounds. Oxidization and ligand compound formation can be run sequentially or simultaneously. The process can be used for bulk metals removal, metal film patterning or trace metals removal.
摘要:
A method of selectively removing silicon nitride from a substrate comprises providing a substrate having silicon nitride on a surface thereof; and dispensing phosphoric acid and sulfuric acid onto the surface of the substrate as a mixed acid liquid stream at a temperature greater than about 150° C. In this method, water is added to a liquid solution of the mixed acid liquid stream as or after the liquid solution of the mixed acid liquid stream passes through a nozzle.
摘要:
Particles are removed from a surface of a substrate by a method comprising causing liquid aerosol droplets comprising water and a tensioactive compound to contact the surface with sufficient force to remove particles from the surface.
摘要:
A semiconductor substrate is heated via exposure to ultraviolet radiation substantially in the absence of a halogen containing chemical and subsequently exposed to a halogen-containing gas in the absence of ultraviolet radiation to remove contaminants therefrom.