WO2008007732A1 - Method for manufacturing semiconductor device - Google Patents
Method for manufacturing semiconductor device Download PDFInfo
- Publication number
- WO2008007732A1 WO2008007732A1 PCT/JP2007/063891 JP2007063891W WO2008007732A1 WO 2008007732 A1 WO2008007732 A1 WO 2008007732A1 JP 2007063891 W JP2007063891 W JP 2007063891W WO 2008007732 A1 WO2008007732 A1 WO 2008007732A1
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- WIPO (PCT)
- Prior art keywords
- intermediate layer
- metal
- semiconductor device
- hole
- copper
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/40—Interconnections external to wafers or substrates, e.g. back-end-of-line [BEOL] metallisations or vias connecting to gate electrodes
- H10W20/41—Interconnections external to wafers or substrates, e.g. back-end-of-line [BEOL] metallisations or vias connecting to gate electrodes characterised by their conductive parts
- H10W20/425—Barrier, adhesion or liner layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/20—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials
- H10P14/22—Formation of materials, e.g. in the shape of layers or pillars of semiconductor materials using physical deposition, e.g. vacuum deposition or sputtering
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/046—Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/14—Metallic material, boron or silicon
- C23C14/18—Metallic material, boron or silicon on other inorganic substrates
- C23C14/185—Metallic material, boron or silicon on other inorganic substrates by cathodic sputtering
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10P—GENERIC PROCESSES OR APPARATUS FOR THE MANUFACTURE OR TREATMENT OF DEVICES COVERED BY CLASS H10
- H10P14/00—Formation of materials, e.g. in the shape of layers or pillars
- H10P14/40—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials
- H10P14/42—Formation of materials, e.g. in the shape of layers or pillars of conductive or resistive materials using a gas or vapour
- H10P14/44—Physical vapour deposition [PVD]
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/033—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers in openings in dielectrics
- H10W20/034—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers in openings in dielectrics bottomless barrier, adhesion or liner layers
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/042—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers the barrier, adhesion or liner layers being seed or nucleation layers
- H10W20/043—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers the barrier, adhesion or liner layers being seed or nucleation layers for electroplating
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/052—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers by treatments not introducing additional elements therein
- H10W20/0526—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers by treatments not introducing additional elements therein by thermal treatment thereof
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/055—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers by formation methods other than physical vapour deposition [PVD], chemical vapour deposition [CVD] or liquid deposition
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/032—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers
- H10W20/055—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers by formation methods other than physical vapour deposition [PVD], chemical vapour deposition [CVD] or liquid deposition
- H10W20/0552—Manufacture or treatment of conductive parts of the interconnections of conductive barrier, adhesion or liner layers by formation methods other than physical vapour deposition [PVD], chemical vapour deposition [CVD] or liquid deposition by diffusing metallic dopants to react with dielectrics
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/031—Manufacture or treatment of conductive parts of the interconnections
- H10W20/056—Manufacture or treatment of conductive parts of the interconnections by filling conductive material into holes, grooves or trenches
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- H—ELECTRICITY
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- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/01—Manufacture or treatment
- H10W20/071—Manufacture or treatment of dielectric parts thereof
- H10W20/074—Manufacture or treatment of dielectric parts thereof of dielectric parts comprising thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers
- H10W20/076—Manufacture or treatment of dielectric parts thereof of dielectric parts comprising thin functional dielectric layers, e.g. dielectric etch-stop, barrier, capping or liner layers in via holes or trenches
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10W—GENERIC PACKAGES, INTERCONNECTIONS, CONNECTORS OR OTHER CONSTRUCTIONAL DETAILS OF DEVICES COVERED BY CLASS H10
- H10W20/00—Interconnections in chips, wafers or substrates
- H10W20/40—Interconnections external to wafers or substrates, e.g. back-end-of-line [BEOL] metallisations or vias connecting to gate electrodes
- H10W20/45—Interconnections external to wafers or substrates, e.g. back-end-of-line [BEOL] metallisations or vias connecting to gate electrodes characterised by their insulating parts
- H10W20/47—Interconnections external to wafers or substrates, e.g. back-end-of-line [BEOL] metallisations or vias connecting to gate electrodes characterised by their insulating parts comprising two or more dielectric layers having different properties, e.g. different dielectric constants
Definitions
- the present invention relates to a film forming method, and more particularly to a film forming method used in a process for manufacturing a semiconductor device.
- Copper has been widely used as a wiring material for semiconductor elements. Copper has the advantage of low resistance compared to other wiring materials such as A1, but when copper is used as the wiring material because it diffuses quickly in the oxide film and in the silicon. Therefore, it is necessary to form a barrier film for preventing copper diffusion between the wiring and the silicon oxide layer.
- a copper target and an Mn target are sputtered in the same vacuum chamber, with copper as the main component,
- Non-Patent Document 1 When a copper thin film to which Mn is added is formed on the substrate surface and then the copper thin film is heated, an oxide-manganese thin film is deposited at the interface between the thin film and the substrate, and the thin film functions as a NORA film. Is known (see, for example, Non-Patent Document 1).
- Non-Patent Document 1 “Applied Physics Letters J, (USA), 2005, 87, 041911 Disclosure of Invention
- the present invention has been made to solve the above-described problems, and an object of the present invention is to provide a film forming method capable of reliably forming a noria film by an easy method. Means for solving the problem
- the present invention provides a processing object having a substrate and a first insulating film disposed on the surface of the substrate and having holes formed therein, the main component of which is copper on the sidewalls of the holes.
- the semiconductor device manufacturing method includes an intermediate layer forming step of generating an intermediate layer containing copper as a main component and containing the diffusible metal and the reactive gas.
- the present invention is a method for manufacturing a semiconductor device, wherein a substrate holder that holds the object to be processed by applying a voltage lower than the voltage applied in the intermediate layer forming step to the target after the intermediate layer forming step.
- a method of manufacturing a semiconductor device according to the present invention wherein the intermediate layer is heated after the etching step, and a barrier film containing the diffusible metal nitride or oxide is formed on the surface of the sidewall of the hole. And a method of manufacturing a semiconductor device having a heating step of forming a base layer containing copper as a main component on the surface of the barrier film.
- the present invention relates to a method for manufacturing a semiconductor device, wherein a surface of a metal wiring is positioned on a bottom surface of the hole, and a semiconductor layer is deposited on the bottom surface of the hole and the sidewall of the hole after the etching step. It is a manufacturing method of an apparatus.
- the present invention is a method for manufacturing a semiconductor device, wherein a second insulating film having a groove from which the first insulating film is exposed is disposed on the first insulating film, and the hole is a bottom surface of the groove.
- the intermediate layer forming step is a method of manufacturing a semiconductor device in which the intermediate layer is also formed on a side wall of the groove and a bottom surface of the groove.
- the present invention is a method for manufacturing a semiconductor device, wherein the etching step is a method for manufacturing a semiconductor device that leaves the intermediate layer grown on a bottom surface of the groove.
- the “main component” means containing 50 atomic% or more of the main component. That is, the intermediate layer containing copper as a main component is an intermediate layer containing 50 atomic percent or more of copper, and the target containing copper as a main component is a target containing 50 atomic percent or more of copper.
- the high-frequency voltage applied to the substrate holder in the intermediate layer forming step and the voltage applied to the target in the etching step each include the case of zero volts.
- the target used in this application is an alloy target containing copper as a main component and added with a diffusible metal.
- the composition of the intermediate layer grown on the surface of the object to be treated matches the composition of the alloy target.
- the amount of diffusible metal added in the layer can be accurately controlled.
- An intermediate layer can be formed by sputtering a copper target (a pure copper target not containing a diffusible metal) and a diffusible metal target without using an alloy target. It is difficult to accurately control the amount of metal added.
- the diffusive metal target has a lower mechanical strength than the alloy target, particles are likely to be generated during sputtering.
- the target replacement time must match the replacement time of either the copper target or the diffusive target, and the target needs to be replaced more frequently than when an alloy target is used.
- the reaction gas By adding the reaction gas to the intermediate layer, the reactivity of the diffusible metal is increased, and the barrier film can be formed at a temperature lower than conventional. Since the amount of diffusible metal added to the intermediate layer can be accurately controlled, the noria film can be formed reliably. Since the barrier film is reliably formed, the copper of the base layer and the metal wiring does not diffuse, and the reliability of the semiconductor device is improved. Since the barrier film formed according to the present application firmly adheres the base layer formed only by the barrier property to copper to the processing object, the metal wiring is hardly peeled off from the processing object.
- FIG. 1 is a cross-sectional view illustrating an example of a film forming apparatus used in the present invention.
- FIG. 2 (a) to (d): Cross-sectional views illustrating the first half of a semiconductor device manufacturing process
- FIG. 3 (a), (b): Cross-sectional views illustrating the second half of the semiconductor device manufacturing process
- FIG. 5 is a perspective view of a semiconductor device.
- FIG. 6 A graph showing the relationship between the oxygen flow rate, the resistivity change rate, and the in-plane distribution of sheet resistance. rough
- Reference numeral 11 in FIG. 2 (a) indicates a processing object used in the present invention.
- the processing object 11 has a substrate 12, a groove is formed on the surface of the substrate 12, and a first metal wiring 14 is arranged in the groove.
- a lower insulating layer 15 is disposed on the surface of the substrate 12 on which the first metal wiring 14 is disposed, and a first protective film 16 is disposed on the surface of the lower insulating layer 15.
- the protective film 16 and the first insulating film 26 are formed.
- An upper insulating layer 17 is disposed on the surface of the first protective film 16
- a second protective film 18 is disposed on the surface of the upper insulating layer 17, and the upper insulating layer 17 and the second protective film 18 are disposed.
- the second insulating film 27 is formed.
- first and second insulating films 26 and 27 a through-hole penetrating the first and second insulating films 26 and 27 is formed immediately above the first metal wiring 14, and the second The insulating film 27 is patterned to form a groove 22 passing through a position intersecting with the through hole.
- Reference numeral 21 in FIG. 2 (a) indicates a hole that is a portion of the through hole that penetrates the first insulating film 26. As described above, the groove 22 intersects the through hole. The opening is exposed at the bottom of the groove 22.
- the first protective film 16 is used as an etching stopper for the upper insulating layer 17 when the groove 22 is formed. Therefore, the first protective film 16 is exposed at portions other than the hole 21 on the bottom surface of the groove 22. is doing.
- Reference numeral 1 in FIG. 1 shows an example of a film forming apparatus used in the present invention.
- This film forming apparatus 1 includes a vacuum chamber 2 and a substrate holder 7 disposed in the vacuum chamber 2 respectively. Have one and five.
- a vacuum evacuation system 9 and a gas supply system 4 are connected to the vacuum chamber 2, and the inside of the vacuum chamber 2 is evacuated to a vacuum, while the gas supply system 4 is sputtered from the gas supply system 4 in the chemical structure.
- a reaction gas containing nitrogen or oxygen is introduced into the vacuum chamber 2 (for example, when the reaction gas is oxygen, the flow rate is 0.1 lsccm or more and 5 SC cm or less), and a film-forming atmosphere lower than atmospheric pressure (for example, the total pressure) 10—
- the processing object 11 described above is held on the substrate holder 7 with the surface on which the groove 22 is formed facing the target 5.
- a sputtering power source 8 and a bias power source 6 are arranged outside the vacuum chamber 2, and the target 5 is connected to the sputtering power source 8 and the substrate holder 7 is connected to the bias power source 6.
- Magnetic field forming means 3 is arranged outside the vacuum chamber 2, and when a negative voltage is applied to the target 5 while the vacuum chamber 2 is placed at the ground potential and the film-forming atmosphere inside the vacuum chamber 2 is maintained, Get 5 is magnetron sputtered.
- Target 5 is an alloy target containing copper as a main component and manganese added in a predetermined amount (for example, more than 2 atomic%).
- a predetermined amount for example, more than 2 atomic%).
- a high-frequency voltage (including OV) is applied to the substrate holder 7, and an amount of plasma corresponding to the magnitude of the high-frequency voltage is incident on the surface of the processing object 11 on which the groove 22 is formed.
- the thin film growing on the surface is etched.
- the magnitudes of the negative voltage and the high-frequency voltage are the same as the film thickness growth rate (sputtering rate) of the thin film when it is assumed that the thin film is not etched. It is set to be larger than the film thickness reduction rate (etching rate), and the side wall and bottom surface of the groove 22, the side wall and bottom surface of the hole 21, and the surface of the second insulating film 27 are shown in FIG. As shown, the thin film 25 grows (intermediate layer forming step).
- the thin film 25 on the bottom surface of the hole 21 is etched, but the plasma is vertically incident on the side wall of the hole 21 and the side wall of the groove 22. So, the thin film 25 remains.
- the high frequency voltage applied to the substrate holder 7, the negative voltage applied to the target 5, and the flow rate of the sputtering gas are such that the thin film 25 remains on the bottom surface of the groove 22 and the surface of the second insulating film 27.
- the high-frequency voltage and negative voltage are applied for a predetermined time, and the bottom surface force of the hole 21 is also removed when the intermediate layer 25 is removed and the first metal wiring 14 is exposed. Are stopped (etching process).
- FIG. 2 (c) shows a state after completion of the etching process.
- the intermediate layer 25 remains on the bottom and side walls and on the surface of the second insulating film 27.
- the side wall of the hole 21, the bottom and side walls of the groove 22, and the intermediate layer 25 on the surface of the second insulating film 27 are continuous.
- the force from which the intermediate layer 25 is removed from the bottom surface of the hole 21 The intermediate layer 25 on the side wall of the hole 21 is in contact with the surface of the first metal wiring 14 at the bottom surface of the hole 21 and is in the middle as described above. Since the layer 25 is mainly composed of copper, the intermediate layer 25 on the side wall of the hole 21, the intermediate layer 25 on the bottom and side walls of the groove 22, the intermediate layer 25 on the surface of the second insulating film 27, and
- the first metal wiring 14 is electrically connected.
- FIG. 2 (d) shows the object 11 to be treated with the metal layer 31 formed!
- Reference numeral 35 in FIG. 4 denotes a heating device.
- the heating device 35 includes a heating chamber 36 and a vacuum exhaust system 37 connected to the heating chamber 36. Start the evacuation system 37 and heat chamber 36 A vacuum atmosphere is formed in the part, and the processing object 11 on which the metal layer 31 is formed is carried into the heating chamber 36 while maintaining the vacuum atmosphere.
- a heater 38 is arranged inside the heating chamber 36. In order to energize the heater 38 and prevent oxidation of the metal layer 31, the object 11 to be treated is maintained while maintaining a vacuum atmosphere.
- the metal layer 31 is annealed by heating at a temperature (eg, 350 ° C. for 2 hours) higher than the temperature raised during the intermediate layer forming step and the etching step.
- Manganese increases the temperature of the intermediate layer 25 during the annealing process in which the diffusion rate in copper is high.
- the manganese contained in the intermediate layer 25 diffuses, and the side wall of the hole 21 and the side wall and bottom surface of the groove 22
- the lower insulating layer 15 and the first protective film 16 are located on the side wall of the hole 21, and the upper insulating layer 17 and the second protective film 18 are located on the side wall of the groove 22.
- the first and second protective films 16 and 18 are made of a nitride such as SiN, and the lower insulating layer 15 and the upper insulating layer 17 are made of an acid such as SiO.
- Manganese has a higher reactivity to nitrogen and oxygen than copper, and the reactivity is increased by adding the above-described reaction gas to the intermediate layer 25.
- Manganese is a nitride contained in the first and second protective films 16, 18 at the interface between the first protective film 16 and the intermediate layer 25 and at the interface between the second protective film 18 and the intermediate layer 25.
- manganese nitride precipitates, and the oxides contained in the lower insulating layer 15 and the upper insulating layer 17 are formed at the interface between the lower insulating layer 15 and the intermediate layer 25 and at the interface between the upper insulating layer 17 and the intermediate layer 25. Reacts with sediment and acid manganese is deposited.
- reaction gas contains nitrogen
- manganese nitride which is a reaction product of nitrogen and manganese of the reaction gas is precipitated at each interface
- reaction gas contains oxygen
- oxygen and manganese of the reaction gas A reaction product of acid-manganese precipitates at each interface.
- the underlayer 28 has copper as a main component, and copper easily diffuses into the key oxide, but the manganese oxide and manganese nitride have the property of shielding the copper diffusion. Therefore, copper is shielded by the noria film 29 and does not enter the lower insulating layer 15 or the upper insulating layer 17.
- the surface of the processing object 11 on which the metal layer 31 is formed is polished by, for example, CMP (Chemical Mechanical Polishing), and the metal layer 31 is removed until the surface of the second insulating film 27 is exposed.
- CMP Chemical Mechanical Polishing
- the metal layer 31 between the grooves 22 is removed, the metal layers 31 filled in the grooves 22 are separated from each other, and the second metal wiring 32 is formed (FIG. 3). (b)).
- Reference numeral 10 in FIGS. 3B and 5 denotes a semiconductor device in which the second metal wiring 32 is formed.
- the hole 21 remains filled with the metal layer 31, and the hole 21 filled with the metal layer 31 constitutes the contact hole 33 that connects the first and second metal wires 14 and 32 to each other. Has been.
- the noria film 29 including one or both of manganese oxide and manganese nitride has high adhesion to both a key compound such as SiO 2 and SiN and a metal material such as copper and aluminum.
- Underlayer 28 mainly composed of copper, and first and second insulating films 26, 27 containing SiO and SiN
- the underlayer 28 Since the noria film 29 is positioned between them, the underlayer 28 is firmly fixed to the bottom and side walls of the groove 22 and the inner wall of the hole 21. The underlayer 28 is fixed in the groove 22 by the underlayer 28 and the barrier film 29 because the second metal wire 32 having high adhesion to the second metal wire 32 is hard to drop off from the semiconductor device 10.
- the underlayer has a single-layer structure
- the present invention is not limited to this.
- a high-purity copper target is placed inside the vacuum chamber 2 separately from the alloy target 5, and after the etching process is finished, the high-purity copper target is sputtered to deposit a copper thin film, More than one layer may be laminated.
- the intermediate layer 25 is removed from the bottom surface of the groove 22 in the etching process, and the intermediate layer 25 is divided, the divided intermediate layer 25 is electrically connected by the copper thin film grown on the bottom surface of the groove 22. Therefore, the metal layer 31 filling the groove 22 can be formed by a plating method. However, if the SiO film is exposed on the bottom surface of the groove 22, copper diffuses from the copper thin film.
- a film having a copper shielding property (for example, a SiN film) is positioned on the surface of the first insulating film 26.
- the constituent material of the first protective film 16 is not limited to SiN as long as it functions as an etching stopper when the upper insulating layer 17 whose etching rate is slower than that of the upper insulating layer 17 is patterned.
- the heating step of heating the intermediate layer 25 to form the barrier film and the base layer may be performed before the metal layer 31 is formed. However, if the heating step is performed after the metal layer 31 is formed, the heating of the intermediate layer 25 and the metal layer 25 are performed.
- the layer 31 can be processed at the same time, and the production time can be shortened.
- the intermediate layer 25 is There is no need to provide a heating step.
- various diffusive metals such as Ti, Ta, Mo, W, and V can be used as long as the diffusion metal has a high diffusion rate in copper and reacts with nitrogen or oxygen.
- Mg and a non-transition metal such as A1 can be added to the target 5 as a diffusible metal.
- transition metals may be added to the alloy target 5 alone, or two or more of them may be added.
- the addition amount of the diffusible metal in the alloy target 5 is not particularly limited, but the addition amount is, for example, 1 atom% or more and 40 atom% or less.
- the reaction gas is not particularly limited as long as it contains oxygen or nitrogen in its chemical structure and reacts with a diffusible metal to produce an oxide or nitride.
- H 0, O, CO , N, N
- reaction gases can be used alone or in two kinds
- the sputtering gas is not particularly limited, and at least one kind of inert gas selected from the group consisting of Ar gas, Ne gas, Xe gas, and Kr gas can be used.
- the constituent material of the lower insulating layer 15 and the upper insulating layer 17 is not limited to the case where the SiO force is also obtained.
- the constituent materials of the first and second metal wirings 14 and 32 are not particularly limited, and various conductive materials such as Cu and A1 can be used.
- the underlying layer 28 is mainly composed of copper.
- the constituent material of the second metal wiring 32 is preferably composed mainly of copper.
- the constituent material of the first metal wiring 14 is preferably composed mainly of copper.
- the second insulating film 27 is disposed on the first insulating film 26 and the hole 21 is located on the bottom surface of the groove 22 of the second insulating film 27.
- the present invention is not limited to this.
- the present invention includes a case where a semiconductor device is manufactured using the processing object 11 in which the second insulating film 27 is not formed and the surface of the first insulating film 26 is exposed.
- the flow rate of the reaction gas introduced into the vacuum chamber 2 during the intermediate layer forming step and the etching step is not particularly limited, but is, for example, 0.1 to 5 sccm, and the pressure inside the vacuum chamber 2 at that time is, for example, 10- 4 Pa or more and 10 or less.
- the applied voltage of the target 5 is reduced in two steps in the intermediate layer forming step and the etching step.
- the present invention is not limited to this, and the applied voltage of the target 5 is three times or more. It may be decreased stepwise, or may be gradually decreased gradually instead of stepwise. Similarly, the high-frequency voltage may be increased step by step three or more times. It may be gradually increased gradually.
- the partial pressure of the reaction gas (O, oxygen) in the film formation atmosphere and the amount of Mn added to the target 5 are set separately.
- the intermediate layer forming step and the etching step were performed to form the intermediate layer 25, and then the semiconductor device 10 was manufactured by the steps described above.
- the conditions of Anirui spoon is pressure of the vacuum atmosphere 6 X 10- 6 Pa, the heating temperature is 350 ° C, the heating time was 1 hour.
- a lattice-like flaw was formed on the surface of the obtained semiconductor device 10 on the side where the second metal wiring 32 was formed.
- An adhesive tape was applied to the surface of the semiconductor element 10 where the scratch was formed, and then peeled off. The presence or absence of peeling of the second metal wiring 32 was observed. The results are shown in Table 1 below together with the partial pressure of oxygen and the amount of Mn added to target 5.
- the intermediate layer forming step and the etching step were performed to form the intermediate layer 25, and then the above-mentioned
- the semiconductor device 10 was manufactured in the process.
- the specific resistance and change in resistance value of the first and second metal wirings 14 and 32 of each semiconductor device 10 are measured, and the measurement results are shown in the graph of FIG.
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- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
- Physical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
Description
Claims
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020087029414A KR101059709B1 (ko) | 2006-07-14 | 2007-07-12 | 반도체 장치의 제조 방법 |
| JP2008524834A JP5145225B2 (ja) | 2006-07-14 | 2007-07-12 | 半導体装置の製造方法 |
| CN2007800266022A CN101490811B (zh) | 2006-07-14 | 2007-07-12 | 半导体装置的制造方法 |
| US12/352,011 US20090120787A1 (en) | 2006-07-14 | 2009-01-12 | Method of manufacturing semiconductor device |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2006-193879 | 2006-07-14 | ||
| JP2006193879 | 2006-07-14 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US12/352,011 Continuation US20090120787A1 (en) | 2006-07-14 | 2009-01-12 | Method of manufacturing semiconductor device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2008007732A1 true WO2008007732A1 (en) | 2008-01-17 |
Family
ID=38923288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2007/063891 Ceased WO2008007732A1 (en) | 2006-07-14 | 2007-07-12 | Method for manufacturing semiconductor device |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20090120787A1 (ja) |
| JP (1) | JP5145225B2 (ja) |
| KR (1) | KR101059709B1 (ja) |
| CN (1) | CN101490811B (ja) |
| TW (1) | TWI397125B (ja) |
| WO (1) | WO2008007732A1 (ja) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010010250A (ja) * | 2008-06-25 | 2010-01-14 | Fujitsu Microelectronics Ltd | 半導体装置およびその製造方法 |
| JP2010074017A (ja) * | 2008-09-22 | 2010-04-02 | Mitsubishi Materials Corp | 密着性に優れた薄膜トランジスター用配線膜およびこの配線膜を形成するためのスパッタリングターゲット |
| JP2011003687A (ja) * | 2009-06-18 | 2011-01-06 | Tokyo Electron Ltd | 多層配線の形成方法 |
| JP2011525697A (ja) * | 2008-03-21 | 2011-09-22 | プレジデント アンド フェロウズ オブ ハーバード カレッジ | 配線用セルフアライン(自己整合)バリア層 |
| JP2013080779A (ja) * | 2011-10-03 | 2013-05-02 | Ulvac Japan Ltd | 半導体装置の製造方法、半導体装置 |
| WO2013191065A1 (ja) * | 2012-06-18 | 2013-12-27 | 東京エレクトロン株式会社 | マンガン含有膜の形成方法 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9076661B2 (en) | 2012-04-13 | 2015-07-07 | Applied Materials, Inc. | Methods for manganese nitride integration |
| US9048294B2 (en) * | 2012-04-13 | 2015-06-02 | Applied Materials, Inc. | Methods for depositing manganese and manganese nitrides |
| TWI609095B (zh) * | 2013-05-30 | 2017-12-21 | 應用材料股份有限公司 | 用於氮化錳整合之方法 |
| US9275952B2 (en) * | 2014-01-24 | 2016-03-01 | International Business Machines Corporation | Ultrathin superlattice of MnO/Mn/MnN and other metal oxide/metal/metal nitride liners and caps for copper low dielectric constant interconnects |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003178999A (ja) * | 2001-10-05 | 2003-06-27 | Handotai Rikougaku Kenkyu Center:Kk | 無電解メッキ方法、埋め込み配線の形成方法、及び埋め込み配線 |
| JP2005166757A (ja) * | 2003-11-28 | 2005-06-23 | Advanced Lcd Technologies Development Center Co Ltd | 配線構造体、配線構造体の形成方法、薄膜トランジスタ、薄膜トランジスタの形成方法、及び表示装置 |
| JP2005277390A (ja) * | 2004-02-27 | 2005-10-06 | Handotai Rikougaku Kenkyu Center:Kk | 半導体装置及びその製造方法 |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4579618A (en) * | 1984-01-06 | 1986-04-01 | Tegal Corporation | Plasma reactor apparatus |
| JPH06333925A (ja) * | 1993-05-20 | 1994-12-02 | Nippon Steel Corp | 半導体集積回路及びその製造方法 |
| US6387805B2 (en) * | 1997-05-08 | 2002-05-14 | Applied Materials, Inc. | Copper alloy seed layer for copper metallization |
| US6037257A (en) * | 1997-05-08 | 2000-03-14 | Applied Materials, Inc. | Sputter deposition and annealing of copper alloy metallization |
| KR100773280B1 (ko) * | 1999-02-17 | 2007-11-05 | 가부시키가이샤 알박 | 배리어막제조방법및배리어막 |
| JP4360716B2 (ja) * | 1999-09-02 | 2009-11-11 | 株式会社アルバック | 銅薄膜製造方法、及びその方法に用いるスパッタ装置 |
| US6491835B1 (en) * | 1999-12-20 | 2002-12-10 | Applied Materials, Inc. | Metal mask etching of silicon |
| US6764940B1 (en) * | 2001-03-13 | 2004-07-20 | Novellus Systems, Inc. | Method for depositing a diffusion barrier for copper interconnect applications |
| KR20040077797A (ko) * | 2002-01-24 | 2004-09-06 | 허니웰 인터내셔널 인코포레이티드 | 박막, 박막을 갖는 구조, 및 박막을 형성하는 방법 |
| JP2005285820A (ja) * | 2004-03-26 | 2005-10-13 | Ulvac Japan Ltd | バイアススパッタ成膜方法及び膜厚制御方法 |
-
2007
- 2007-07-12 WO PCT/JP2007/063891 patent/WO2008007732A1/ja not_active Ceased
- 2007-07-12 CN CN2007800266022A patent/CN101490811B/zh not_active Expired - Fee Related
- 2007-07-12 JP JP2008524834A patent/JP5145225B2/ja not_active Expired - Fee Related
- 2007-07-12 KR KR1020087029414A patent/KR101059709B1/ko not_active Expired - Fee Related
- 2007-07-13 TW TW096125743A patent/TWI397125B/zh active
-
2009
- 2009-01-12 US US12/352,011 patent/US20090120787A1/en not_active Abandoned
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003178999A (ja) * | 2001-10-05 | 2003-06-27 | Handotai Rikougaku Kenkyu Center:Kk | 無電解メッキ方法、埋め込み配線の形成方法、及び埋め込み配線 |
| JP2005166757A (ja) * | 2003-11-28 | 2005-06-23 | Advanced Lcd Technologies Development Center Co Ltd | 配線構造体、配線構造体の形成方法、薄膜トランジスタ、薄膜トランジスタの形成方法、及び表示装置 |
| JP2005277390A (ja) * | 2004-02-27 | 2005-10-06 | Handotai Rikougaku Kenkyu Center:Kk | 半導体装置及びその製造方法 |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011525697A (ja) * | 2008-03-21 | 2011-09-22 | プレジデント アンド フェロウズ オブ ハーバード カレッジ | 配線用セルフアライン(自己整合)バリア層 |
| JP2010010250A (ja) * | 2008-06-25 | 2010-01-14 | Fujitsu Microelectronics Ltd | 半導体装置およびその製造方法 |
| JP2010074017A (ja) * | 2008-09-22 | 2010-04-02 | Mitsubishi Materials Corp | 密着性に優れた薄膜トランジスター用配線膜およびこの配線膜を形成するためのスパッタリングターゲット |
| JP2011003687A (ja) * | 2009-06-18 | 2011-01-06 | Tokyo Electron Ltd | 多層配線の形成方法 |
| JP2013080779A (ja) * | 2011-10-03 | 2013-05-02 | Ulvac Japan Ltd | 半導体装置の製造方法、半導体装置 |
| WO2013191065A1 (ja) * | 2012-06-18 | 2013-12-27 | 東京エレクトロン株式会社 | マンガン含有膜の形成方法 |
| JPWO2013191065A1 (ja) * | 2012-06-18 | 2016-05-26 | 東京エレクトロン株式会社 | マンガン含有膜の形成方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20090010089A (ko) | 2009-01-28 |
| TWI397125B (zh) | 2013-05-21 |
| CN101490811A (zh) | 2009-07-22 |
| US20090120787A1 (en) | 2009-05-14 |
| TW200811954A (en) | 2008-03-01 |
| KR101059709B1 (ko) | 2011-08-29 |
| CN101490811B (zh) | 2011-06-08 |
| JPWO2008007732A1 (ja) | 2009-12-10 |
| JP5145225B2 (ja) | 2013-02-13 |
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