# US 7,611,971 B2 · Method of removing residual contaminants from an environment > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,611,971 B2 - Document ID: US7611971B2 - Status: Granted - Kind: B2 - Application number: 11/472,009 - Filed: 2006-06-21 - Published: 2006-10-26 - Granted: 2009-11-03 - Earliest claimed: 2003-12-11 - Assignees: Micron Technology, Inc. - Inventors: Demetrius Sarigiannis; Cem Basceri; Christopher W. Hill; Garo J. Derderian - Web page: https://patentgrep.com/patent/US7611971B2 ## CPC - C23C 16/4401: {Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber} - C23C 14/564: {Means for minimising impurities in the coating chamber such as dust, moisture, residual gases} - C23C: COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL (making metal-coated products by extrusion B21C23/22; covering with metal by connecting pre-existing layers to articles, see the relevant places, e.g. B21D39/00, B23K; metallising of glass C03C; metallising mortars, concrete, artificial stone, ceramics or natural stone C04B41/00; enamelling of, or applying a vitreous layer to, metals C23D; treating metal surfaces or coating of metals by electrolysis or electrophoresis C25D; single-crystal film growth C30B; by metallising textiles D06M11/83; decorating textiles by locally metallising D06Q1/04) ## Abstract A method of reducing the amount of halogenated materials in a halogen-containing environment. The method comprises introducing an aluminum compound into the halogen-containing environment, reacting the aluminum compound with the halogenated material to form a gaseous reaction product, and removing the gaseous reaction product from the environment. The aluminum compound may be a trialkylaluminum compound, an alane, an alkylaluminum hydride, an alkylaluminum halide, an alkylaluminum sesquihalide, or an aluminum sesquihalide. The aluminum compound may alternatively form a solid aluminum product, which is deposited on a surface associated with the halogen-containing environment or onto a semiconductor disposed therewithin. The halogenated material is incorporated into the solid aluminum product, forming an inert film within which the halogenated material is trapped. ## Claims ### Claim 1 A method of removing halogenated materials from a halogen-containing environment, comprising: introducing at least one gaseous aluminum compound and at least one oxidizer into a halogen-containing environment; forming a solid aluminum product on at least a portion of at least one surface associated with the halogen-containing environment; and incorporating at least one halogenated material into the solid aluminum product to form an inert film on the at least one surface. ### Claim 2 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing the at least one gaseous aluminum compound and the at least one oxidizer into an environment having the at least one halogenated material adhered to a surface associated therewith. ### Claim 3 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises pulsing the at least one gaseous aluminum compound and the at least one oxidizer into the halogen-containing environment. ### Claim 4 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing at least one organic aluminum compound selected from the group consisting of a trialkylaluminum compound, an alane, an alkylaluminum hydride, an alkylaluminum halide, an alkylaluminum sesquihalide, and an aluminum sesquihalide into the halogen-containing environment. ### Claim 5 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing at least one organic aluminum compound selected from the group consisting of trimethyl aluminum, triethyl aluminum, triisobutyl aluminum, triethyl(tri-sec-butoxy)dialuminum, and tritertiarybutyl aluminum into the halogen-containing environment. ### Claim 6 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing dimethylethylamine alane or trimethylamine alane into the halogen-containing environment. ### Claim 7 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing at least one organic aluminum compound selected from the group consisting of dimethyl aluminum hydride, diethyl aluminum hydride, and methyl ethyl aluminum hydride into the halogen-containing environment. ### Claim 8 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing at least one oxidizer selected from the group consisting of oxygen, ozone, water, hydrogen peroxide, and isopropanol. ### Claim 9 (depends on 1) The method of claim 1, wherein introducing at least one gaseous aluminum compound and at least one oxidizer into the halogen-containing environment comprises introducing the at least one gaseous aluminum compound and the at least one oxidizer into a deposition chamber. ### Claim 10 (depends on 1) The method of claim 1, wherein forming a solid aluminum product on at least a portion of a surface associated with the halogen-containing environment comprises forming an aluminum oxide layer on at least a portion of the surface. ### Claim 11 (depends on 1) The method of claim 1, further comprising maintaining temperature and pressure conditions in the halogen-containing environment such that the solid aluminum product is deposited on at least a portion of the at least one surface associated with the halogen-containing environment. ### Claim 12 (depends on 1) The method of claim 1, wherein incorporating at least one halogenated material into the solid aluminum product to form an inert film comprises incorporating at least a portion of the at least one halo genated material into the solid aluminum product to form the inert film. ### Claim 13 (depends on 1) The method of claim 1, wherein incorporating at least one halogenated material into the solid aluminum product to form an inert film comprises forming an adduct between the solid aluminum product and the at least one halogenated material. ### Claim 14 (depends on 1) The method of claim 1, further comprising removing the inert film from the at least one surface. ### Claim 15 (depends on 14) The method of claim 14, wherein removing the inert film from the at least one surface comprises at least partially removing the inert film from the at least one surface by chemical etching. ### Claim 16 (depends on 1) The method of claim 1, further comprising forming a barrier layer over at least a portion of the inert film. ### Claim 17 (depends on 16) The method of claim 16, further comprising removing the barrier layer from the at least one surface. ### Claim 18 (depends on 16) The method of claim 16, further comprising removing the inert film and the barrier layer from the at least one surface. ### Claim 19 (depends on 18) The method of claim 18, further comprising removing the inert film and the barrier layer from the at least one surface substantially simultaneously. ### Claim 20 (depends on 16) The method of claim 16, wherein forming a barrier layer over at least a portion of the inert film comprises forming a silicon oxide layer over the at least a portion of the inert film.