WO2005069358A1 - 成膜方法 - Google Patents
成膜方法 Download PDFInfo
- Publication number
- WO2005069358A1 WO2005069358A1 PCT/JP2005/000384 JP2005000384W WO2005069358A1 WO 2005069358 A1 WO2005069358 A1 WO 2005069358A1 JP 2005000384 W JP2005000384 W JP 2005000384W WO 2005069358 A1 WO2005069358 A1 WO 2005069358A1
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- WIPO (PCT)
- Prior art keywords
- film
- gas
- nitrogen
- substrate
- reducing gas
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 93
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 64
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 15
- 239000007789 gas Substances 0.000 claims description 378
- 239000002184 metal Substances 0.000 claims description 102
- 229910052751 metal Inorganic materials 0.000 claims description 102
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 claims description 102
- 150000004767 nitrides Chemical class 0.000 claims description 96
- 239000000758 substrate Substances 0.000 claims description 88
- 238000012545 processing Methods 0.000 claims description 79
- 150000002736 metal compounds Chemical class 0.000 claims description 43
- 150000001875 compounds Chemical class 0.000 claims description 7
- 230000008021 deposition Effects 0.000 claims description 7
- 235000011470 Adenanthera pavonina Nutrition 0.000 claims description 3
- 240000001606 Adenanthera pavonina Species 0.000 claims description 3
- 230000008569 process Effects 0.000 abstract description 20
- 239000004065 semiconductor Substances 0.000 abstract description 8
- 229910003074 TiCl4 Inorganic materials 0.000 abstract 2
- XJDNKRIXUMDJCW-UHFFFAOYSA-J titanium tetrachloride Chemical compound Cl[Ti](Cl)(Cl)Cl XJDNKRIXUMDJCW-UHFFFAOYSA-J 0.000 abstract 2
- 239000010408 film Substances 0.000 description 330
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 98
- 239000010410 layer Substances 0.000 description 43
- 239000010409 thin film Substances 0.000 description 29
- 230000002159 abnormal effect Effects 0.000 description 17
- 239000003990 capacitor Substances 0.000 description 16
- 229910005883 NiSi Inorganic materials 0.000 description 14
- 238000010926 purge Methods 0.000 description 13
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 11
- 239000010936 titanium Substances 0.000 description 10
- 239000000463 material Substances 0.000 description 9
- 230000001965 increasing effect Effects 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 6
- 238000000151 deposition Methods 0.000 description 6
- 229910052757 nitrogen Inorganic materials 0.000 description 6
- 238000003860 storage Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 5
- 229910008484 TiSi Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000009792 diffusion process Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 229910004129 HfSiO Inorganic materials 0.000 description 3
- 238000000137 annealing Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000003028 elevating effect Effects 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 239000011229 interlayer Substances 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- HDZGCSFEDULWCS-UHFFFAOYSA-N monomethylhydrazine Chemical compound CNN HDZGCSFEDULWCS-UHFFFAOYSA-N 0.000 description 2
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 2
- 229910019001 CoSi Inorganic materials 0.000 description 1
- 229910052774 Proactinium Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000001020 plasma etching Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
Classifications
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/455—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for introducing gases into reaction chamber or for modifying gas flows in reaction chamber
- C23C16/45523—Pulsed gas flow or change of composition over time
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/22—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of inorganic material, other than metallic material
- C23C16/30—Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
- C23C16/34—Nitrides
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/28—Manufacture of electrodes on semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/268
- H01L21/283—Deposition of conductive or insulating materials for electrodes conducting electric current
- H01L21/285—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation
- H01L21/28506—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers
- H01L21/28512—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table
- H01L21/28556—Deposition of conductive or insulating materials for electrodes conducting electric current from a gas or vapour, e.g. condensation of conductive layers on semiconductor bodies comprising elements of Group IV of the Periodic Table by chemical means, e.g. CVD, LPCVD, PECVD, laser CVD
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76843—Barrier, adhesion or liner layers formed in openings in a dielectric
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/70—Manufacture or treatment of devices consisting of a plurality of solid state components formed in or on a common substrate or of parts thereof; Manufacture of integrated circuit devices or of parts thereof
- H01L21/71—Manufacture of specific parts of devices defined in group H01L21/70
- H01L21/768—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics
- H01L21/76838—Applying interconnections to be used for carrying current between separate components within a device comprising conductors and dielectrics characterised by the formation and the after-treatment of the conductors
- H01L21/76841—Barrier, adhesion or liner layers
- H01L21/76867—Barrier, adhesion or liner layers characterized by methods of formation other than PVD, CVD or deposition from a liquids
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L28/00—Passive two-terminal components without a potential-jump or surface barrier for integrated circuits; Details thereof; Multistep manufacturing processes therefor
- H01L28/40—Capacitors
- H01L28/60—Electrodes
Definitions
- the present invention relates to a film forming method by CVD, and particularly to a method of forming a metal nitride film such as a TiN-based thin film used as a barrier layer, a capacitor upper electrode, a gate electrode, a contact portion, etc. in a semiconductor device. It relates to a membrane method.
- TiN films are being used as barrier layers of metal filling contact holes and via holes as described above, and as upper electrodes of capacitors.
- Such a TiN film has conventionally been formed by PVD, but with the recent miniaturization and high integration of devices, a higher quality film can be formed with higher coverage. CVD has been heavily used.
- Patent Document 1 A technique that has been made possible has been proposed.
- a film When a film is formed as an upper electrode, it is required to form the film at a lower temperature of less than 450 ° C. in order to prevent thermal damage to the underlying layer.
- a practical film formation is carried out at such a low temperature by using such a method, there is a disadvantage that abnormal growth occurs during the formation of the metal nitride film, the film quality is deteriorated, and the specific resistance value is increased.
- NiSi or the like when used as a contact material, NiSi has low heat resistance. Even when a metal nitride film is formed using this NiSi as a base, a low-temperature film formation at 450 ° C or lower is desired.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2003-77864
- An object of the present invention is to provide a film forming method capable of forming a good-quality metal nitride film with a high step coverage at a low film forming temperature of less than 450 ° C. in comparison with the CVD method. Is to do
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- a temperature of the substrate to be processed at the time of film formation is set to less than 450 ° C., a total pressure in the processing container is set to more than 100 Pa, and a nitrogen in the processing container in the first step is formed.
- a film formation method is provided in which the partial pressure of the contained reducing gas is 30 pa or less.
- a TiN bonding gas and a nitrogen-containing reducing gas are supplied to a substrate heated to a film forming temperature in a processing container, and the TiN gas is supplied by CVD.
- a cycle comprising a first step of forming a film having a predetermined thickness and a second step of stopping the Ti compound gas and supplying the nitrogen-containing reducing gas is repeated one or more cycles to form a film having a predetermined thickness on the substrate to be processed.
- a method of forming a TiN film wherein the temperature of the substrate to be processed during film formation is less than 450 ° C., the total pressure in the processing container is more than 100 Pa, and the processing container in the first step is There is provided a film forming method in which the partial pressure of the nitrogen-containing reducing gas in the gas is set to 30 pa or less.
- a substrate to be processed heated to a film forming temperature in a processing chamber A first step of forming a film made of metal nitride by CVD by supplying a metal compound gas and a nitrogen-containing reducing gas to the substrate, and a second step of supplying the nitrogen-containing reducing gas by stopping the metal compound gas.
- an initial metal nitride film is formed with a first thickness on the substrate to be processed, and then a metal compound gas and a nitrogen-containing reducing gas are supplied to the substrate to be processed, thereby continuously Forming a residual metal nitride film with a second thickness by chemical CVD, wherein the initial metal nitride film is formed by setting the temperature of the substrate to be processed to less than 450 ° C.
- a film forming method is provided in which the total pressure in the container is more than 100 Pa and the partial pressure of the nitrogen-containing reducing gas in the processing container in the first step is 30 pa or less.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate heated at a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated one or more cycles to form an initial first thickness on the substrate to be processed.
- the temperature of the substrate to be processed is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen-containing reducing gas in the processing container in the first step is set.
- the partial pressure of A film forming method is provided in which, when forming the remaining metal nitride film, the partial pressure of the nitrogen-containing reducing gas in the processing container in the first step is set to more than 30 pa.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed at the time of film formation is less than 450 ° C.
- the total pressure in the processing container is more than 100 Pa
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing container to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed at the time of film formation is less than 450 ° C.
- the total pressure in the processing container is more than 100 Pa
- the film thickness per cycle is T (nm)
- the nitrogen-containing reduction hk in the first step is
- a film forming method in which a resistance value R is 800 ⁇ cm or less.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed at the time of film formation is less than 450 ° C.
- the total pressure in the processing container is more than 100 Pa
- the film thickness per cycle is T (nm)
- the nitrogen-containing reduction hk in the first step is
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed during the film formation is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen-containing reducing gas in the processing container in the first step is used.
- a computer-readable recording medium including software for controlling a film forming apparatus by a computer so that the partial pressure of the film is set to 30 pa or less is provided.
- a TiN conjugate gas and a nitrogen-containing reducing gas are supplied to a substrate heated to a film forming temperature in a processing container, and the TiN gas is supplied by CVD.
- a cycle comprising a first step of forming a film having a predetermined thickness and a second step of stopping the Ti compound gas and supplying the nitrogen-containing reducing gas is repeated one or more cycles to form a film having a predetermined thickness on the substrate to be processed.
- the temperature of the substrate to be processed at the time of film formation is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen content in the processing container in the first step is reduced.
- a computer-readable recording medium including software for controlling a film forming apparatus by a computer so that the partial pressure of the reducing gas is set to 30 pa or less is provided.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed during the film formation is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen content in the processing container in the first step is reduced.
- hk of the metal nitride film is calculated by the following equation (A).
- a computer that controls the film forming apparatus so that the specific resistance R is 800 ⁇ -cm or less.
- a computer-readable recording medium including software is provided.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed during the film formation is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen content in the processing container in the first step is reduced.
- the film thickness per ital is T (nm), and the hk of the nitrogen-containing reducing gas in the first step is
- a computer-readable recording medium including software for controlling a film forming apparatus by a computer so as to be ⁇ -cm or less is provided.
- a metal compound gas and a nitrogen-containing reducing gas are supplied to a substrate to be processed heated to a film forming temperature in a processing chamber to form a film made of a metal nitride by CVD.
- a cycle consisting of a first step of forming and a second step of stopping the metal compound gas and supplying the nitrogen-containing reducing gas is repeated at least one cycle, and a metal nitride film having a predetermined thickness is formed on the substrate to be processed.
- the temperature of the substrate to be processed during the film formation is set to less than 450 ° C.
- the total pressure in the processing container is set to more than 100 Pa
- the nitrogen content in the processing container in the first step is reduced.
- the film thickness per ital is T (nm), and the hk of the nitrogen-containing reducing gas in the first step is
- a computer-readable recording medium including software for controlling a film forming apparatus by a computer so that a specific resistance value R of a metal nitride film to be formed is 800 ⁇ -cm or less is provided.
- R 115.75 X Ln (T) + 71.576 X Ln (P)
- the film forming rate is reduced by setting the partial pressure of the nitrogen-containing reducing gas to 30 pa or less, so that the metal compound gas and the nitrogen-containing reducing gas are not mixed.
- the reaction time can be lengthened, and the metal compound gas can be sufficiently reduced by the nitrogen-containing reducing gas.
- the total pressure can be over 100 Pa, high step coverage can be realized. Therefore, even at a low film formation temperature of less than 450 ° C., a high-quality metal nitride film such as a TiN film having a low specific resistance and a small abnormal growth can be formed with a high step coverage.
- the partial pressure of the nitrogen-containing reducing gas is increased to increase the film forming speed!
- the partial pressure of the nitrogen-containing reducing gas by reducing the partial pressure of the nitrogen-containing reducing gas to 30 pa or less, a high-quality metal nitride film was successfully formed at a low temperature.
- an initial metal nitride film is formed at a first thickness by the methods of the first and second aspects, respectively, and then a high throughput Since the remaining metal nitride film is formed with the second thickness by a method capable of forming a thin film, the initial metal nitride film that affects the underlayer is made of a high-quality film having a low specific resistance by low-temperature film formation, and The remaining film can be formed at a high throughput without affecting the formation of a high-quality metal nitride film having a low specific resistance value by low-temperature film formation, and the throughput of the film formation of the metal nitride film can be reduced. It is possible to achieve both improvement and improvement.
- the optimum values of both are considered.
- High-quality metal nitride film such as TiN film at low deposition temperature of less than 450 ° C, which can be combined and the total pressure exceeds 100Pa, without increasing the number of cycles more than necessary.
- the specific resistance of the metal nitride film can be increased by increasing the number of repetitions (cycles) of intermittent supply.
- the metal nitride film in addition to the partial pressure of the nitrogen-containing reducing gas, the number of intermittent supply cycles, and the flow rate of the nitrogen-containing reducing gas, which is another parameter that affects the film quality. Since the metal nitride film can be formed in an optimal combination in consideration of the amount and the temperature of the substrate to be processed, it is possible to more reliably form a good quality TiN film at a low film formation temperature of less than 450 ° C. A metal nitride film can be formed with high step coverage.
- FIG. 1 is a schematic cross-sectional view showing an example of a configuration of a film forming apparatus used in a film forming method according to the present invention.
- FIG. 2 is a diagram showing an example of gas supply control in one embodiment of a film forming method according to the present invention.
- FIG. 3 is a graph showing an effect when the first embodiment of the film forming method according to the present invention is performed.
- FIG. 4 is a view showing the relationship between the NH gas partial pressure in the first step and the specific resistance of the formed TiN film.
- FIG. 5 is a graph showing the relationship between the thickness of a TiN film per cycle and the specific resistance of the formed TiN film.
- FIG. 6 is a diagram showing the relationship between the NH3 gas flow rate in the first step and the specific resistance of the formed TiN film.
- FIG. 7 is a view showing the relationship between the temperature of a semiconductor wafer during film formation and the specific resistance of a formed TiN film.
- FIG. 9 A graph showing the relationship between the specific resistance R of a TiN film calculated by equation (8) and the actual specific resistance value.
- FIG. 9 is a diagram showing an example of an operation of a modification of the film forming method according to one embodiment of the present invention.
- FIG. 10 is a cross-sectional view showing an example in which a TiN thin film formed by a film forming method according to the present invention is used for a contact portion of a metal wiring layer.
- FIG. 11 is a cross-sectional view showing an example in which a TiN thin film formed by a film forming method according to the present invention is used for a capacitor structure of a DRAM or the like.
- FIG. 12 is a cross-sectional view showing another example in which a TiN thin film formed by the film forming method according to the present invention is used for a capacitor structure of a DRAM or the like.
- FIG. 13 is a cross-sectional view showing still another example in which a TiN thin film formed by the film forming method according to the present invention is used for a capacitor structure of a DRAM or the like.
- TiCl gas was used as the metal compound gas
- NH gas was used as the nitrogen-containing reducing gas
- TiN titanium nitride
- FIG. 1 is a schematic configuration diagram illustrating an example of a film forming apparatus used for performing the film forming method of the present invention.
- the film forming apparatus 40 has a substantially cylindrical chamber 51 that is airtightly formed, and a susceptor 52 for horizontally supporting a wafer W to be processed is provided in the center thereof. It is arranged so as to be supported by a cylindrical support member 53 provided at the lower part.
- the susceptor 52 also has a ceramic force such as A1N, and a guide ring 54 for guiding the wafer W is provided at an outer edge thereof.
- a heater 55 is embedded in the susceptor 52, and the heater 55 is heated by a heater power supply 56 to heat the processing target Ueno and W to a predetermined temperature.
- an electrode 58 functioning as a lower electrode is embedded on the heater 55.
- a loading / unloading port 92 is opened in a side surface portion of the chamber 51.
- the loading / unloading port 92 is connected to the susceptor 52 by a wafer transfer device (not shown) from an external wafer transfer chamber (not shown) through a gate valve G. During this time, the loading and unloading of Ueno and W are performed.
- a plurality of elevating pins 89 for elevating the wafer W when transferring the wafer W to and from the wafer transfer device (not shown) are provided in the wafer W mounting area of the susceptor 52. These elevating pins 89 are provided so as to be penetrated, and are driven up and down by a lifting mechanism 91 via a drive arm 90.
- An exhaust chamber 86 is provided at the bottom of the chamber 51, and an exhaust device 88 is provided through an exhaust pipe 87.
- the inside of the chamber 51 can be uniformly evacuated to a desired vacuum degree.
- a shower head 60 is provided on a top wall 51a of the first chamber 51.
- the shower head 60 includes an upper block body 60a, a middle block body 60b, and a lower block body 60c.
- discharge holes 67 and 68 for discharging gas are formed alternately.
- a first gas inlet 61 and a second gas inlet 62 are formed on the upper surface of the upper block body 60a.
- a number of gas passages 63 are branched from the first gas inlet 61.
- Gas passages 65 are formed in the middle block body 60b, and the gas passages 63 communicate with the gas passages 65 through communication passages 63a extending horizontally. Further, the gas passage 65 communicates with the discharge hole 67 of the lower block body 60c.
- a number of gas passages 64 are branched from the second gas inlet 62.
- a gas passage 66 is formed in the middle block body 60b, and the gas passage 64 communicates with the gas passages 66.
- the gas passage 66 is connected to a communication passage 66a extending horizontally in the middle block body 60b, and the communication passage 66a communicates with a number of discharge holes 68 of the lower block body 60c.
- the first and second gas introduction ports 61 and 62 are connected to a gas supply mechanism 110 described later, respectively.
- the gas supply mechanism 110 is a C1F gas supply source that supplies a C1F gas that is a cleaning gas.
- Supply source 111 has C1F gas supply line 116, TiCl gas supply source 112 has TiCl gas supply
- first N gas supply source 113 has first N gas supply line 118, NH gas
- source gas supply source 114 has an NH gas supply line 119
- second N gas supply source 115 has a second gas supply line 119.
- N gas supply lines 120 are connected respectively. Although not shown, supply of Ar gas
- Each gas supply line is provided with a mass flow controller 122 and two valves 121 with the mass flow controller 122 interposed therebetween.
- the first gas inlet 61 of the shower head 60 has a TiCl gas supply source 112 A gas supply line 117 is connected, and this TiCl gas supply line 117 is connected to C1F gas.
- An extended first N gas supply line 118 is connected.
- the H gas supply line 119 has a second N gas supply extending from the second N gas supply source 115.
- the eleventh gas from the TiCl gas supply source 112 is supplied to the first N gas.
- the nitrogen gas from the NH gas supply source 114 is discharged from the first gas inlet 61 into the shower head 60 through the gas passages 63 and 65 into the chamber 51 through the discharge holes 67.
- NH gas which is a reducing gas, is mixed with N gas from the second N gas supply source 115
- the gas flows from the second gas introduction port 62 of the shower head 60 into the shower head 60 through the 3 2 2 3 supply line 119, and is discharged from the discharge holes 68 into the chamber 51 via the gas passages 64 and 66.
- the TiCl gas and the NH gas are completely independent of each other in the chamber.
- valve 121 and the mass flow controller 122 are controlled by the controller 123.
- the process controller 130 has a user interface 131 including a keyboard for a process manager to input commands to manage the film forming apparatus 40 and a display for visualizing and displaying the operation status of the film forming apparatus 40. It is connected
- the process controller 130 includes a control program for realizing various processes executed by the film forming apparatus 40 under the control of the process controller 130, and various components of the plasma etching apparatus according to processing conditions.
- a storage unit 132 in which a program for executing processing, that is, a recipe, is connected.
- the recipe may be stored on a hard disk or a semiconductor memory, or stored in a portable storage medium such as a CDROM or a DVD. It may be set at a predetermined position of the storage unit 132 in the state.
- the recipe may be transmitted from another device as appropriate, for example, via a dedicated line.
- an arbitrary recipe is called from the storage unit 132 according to an instruction from the user interface 131 and the like, and the process controller 130 executes the recipe, thereby forming a film under the control of the process controller 130.
- the desired processing in the device 40 is performed.
- the inside of the chamber 51 is cut off by the exhaust device 88, and the first N gas supply source is
- the heater 55 preheats the inside of the chamber 51 while introducing it into the chamber 51.
- the first N gas source 113 When the temperature stabilizes, the first N gas source 113
- the air is first exhausted through a preflow line (not shown) to stabilize the flow rate, and then switched to the shower head 60 side to be introduced into the chamber 151.
- the TiN film is pre-coated on the inner surface of the chamber 1 such as the inner wall of the chamber 51, the susceptor 52, the guide ring 54, and the shower head 60, etc. by the heat generated by the heater 55.
- the surface of the precoated TiN thin film is nitrided to stabilize the precoated film.
- the inside of the chamber 51 is rapidly evacuated by the exhaust device 88 to a cut-off state, the gate valve G is opened, and the wafer W is loaded into the chamber 51 via the loading / unloading port 92. . Then, N gas is supplied into the chamber 151 to preheat the Ueno and W. ⁇
- the heater 55 is used to lower the wafer temperature to less than 450 ° C., preferably less than 400 ° C., and more preferably 350 ° C. or less.
- the wafer temperature is less than 450 ° C., preferably less than 400 ° C., and more preferably 350 ° C. or less.
- TaO, HfO, HfSiO, PZT, BST, RuO, ReO Even if a thermally sensitive film such as NiSi used as a tact material is formed, the film can be formed without damaging the base.
- the second step of feeding into the 51 and performing annealing is performed. Subsequently, stop the NH gas G2, and purge gas (not shown).
- the above steps are taken as one cycle, and the cycle is repeated at least one cycle, preferably at least two cycles, more preferably at least three cycles, for example, about 12 to 24 times.
- the switching of the gas at this time is performed by switching the valve by the controller 123.
- a TiN film having a desired thickness is formed on the wafer.
- a film is formed on W.
- the thickness of this TiN film is, for example, 5-100 nm, preferably 10-50 ⁇ m.
- a gas containing a nitrogen atom or a hydrogen atom may be introduced to lightly nitride the surface of the insulating film.
- the NH content in the first step at the time of such TiN film formation is set.
- the film formation rate is lower than the partial pressure of NH, which is a reducing gas.
- the NH partial pressure should be as high as possible without causing harmful powdery by-products.
- the present embodiment reduces the NH partial pressure during film formation to 30 Pa or less, contrary to the conventional technical knowledge. As a result, TiCl and NH
- reaction time with 3 4 3 can be lengthened to reduce the deposition rate, and TiCl
- the NH partial pressure during film formation should be 20 Pa or less. It is desirable to
- the total pressure in chamber 51 is set to be greater than 100 Pa in both the first step and the second step. This can improve the step coverage.
- the upper limit of the total pressure in the chamber 51 does not need to be particularly determined, but about 1300 Pa is a practical upper limit in terms of equipment. Preferably, it is more than 100 Pa and not more than 667 Pa.
- the total pressure in the chamber 151 during the film formation is reduced.
- the film was formed at a low value of less than lOOPa, but there was a problem that the step coverage was bad!
- the abnormal growth is reduced by lowering the NH partial pressure.
- the film quality and the step coverage can be made compatible by making the total pressure in the chamber 151 larger than 100 Pa.
- the film thickness per cycle is, for example, 0.25-2.50 nm.
- FIG. 3 shows the result of confirming the above through experiments.
- FIG. 3 shows the NH gas G2 when the temperature (film formation temperature) of the wafer W to be formed is 380 ° C. for the film formation by intermittent gas supply as exemplified in FIG. Partial pressure (Pa) and the specific resistance of the resulting TiN film
- the film thickness formed in one cycle ⁇ ⁇ ⁇ .00, 1.00, 0.50, 0.25
- the specific resistance value is an appropriate standard for the upper electrode and is 800 ⁇ -cm or less, at which abnormal growth hardly occurs. If the partial pressure of NH gas G2 is 20 Pa or less, the film thickness per cycle is further increased.
- the range it is preferable to set the range to more than 100 Pa and less than 100 Pa from the viewpoint of improving the step coverage. Also, the partial pressure of NH gas G2 in the second step
- the TiCl gas G1 is exemplified by 5-200 mL / min, and the NH gas G2 is
- the N gas G3 for purging is 50-5000mLZ, preferably 50-
- the lOOOmLZ component is exemplified.
- the flow rate of G2 be 20 mLZ minutes or more. There is no particular upper limit, but 20-300mLZ is practically adopted.
- Preferred conditions taking into account conditions other than the NH gas partial pressure and the total pressure in the first step are as follows.
- TiCl gas partial pressure lOPa over lOOPa or less
- the time of the first step shown in FIG. 2 is exemplified by 2 to 8 seconds, and the time of the subsequent purge is exemplified by 0.5 to 20 seconds.
- the step time is exemplified by 0.5 to 8 seconds, and the subsequent purge time is exemplified by 0.5 to 20 seconds.
- the partial pressure of the NH gas G2 which is a nitrogen-containing reducing gas, is set to 30 Pa or less, preferably 20 Pa or less, more preferably 15 Pa or less.
- the deposition rate is suppressed in the first step, and the TiN film formed over a sufficient time is efficiently de-C1 by annealing in the second step, and the residual chlorine in the film is reduced. It is possible to remarkably lower the temperature, to form a high-quality TiN film with low residual resistance and low residual chlorine even at low temperature, and to increase the total pressure to more than 100Pa. Good coverage can be achieved.
- Ta O, HfO used as a capacitor material of a DRAM memory unit
- the thickness of the TiN film in the second film formation step is larger than the film thickness of the TiN film in the first film formation step.
- the thickness of the TiN film in the first film forming step may be larger.
- the film thickness of the TiN film in the first film forming step is, for example, 5 to 50 nm, and the film thickness of the TiN film in the second film forming step is, for example, 5 to 95 nm.
- the film quality of the formed film can be grasped by the specific resistance. If the specific resistance is 80 ⁇ m-cm or less, a good film having almost no abnormal growth can be obtained. Since it is known, the NH gas partial pressure is set so that the specific resistance is 800 ⁇ -cm or less.
- FIG. 4 is a graph showing a relationship between the NH gas partial pressure P and the specific resistance of the TiN film.
- the film thickness T per cycle is 0.5 nm
- NH gas flow rate F is 30 mLZmin
- the degree T is set to 400 ° C. As shown in Fig. 4, the ratio increases as the NH gas partial pressure P increases.
- FIG. 5 is a graph showing the relationship between the film thickness T per cycle and the specific resistance of the TiN film.
- NH gas partial pressure P is 30 Pa
- NH gas flow rate F is 30 mL / min
- T 400 ° C. As shown in Fig. 5, as the film thickness T per cycle increases,
- the NH gas partial pressure P and the film thickness T per cycle are determined so that the specific resistance R of the TiN film in the above equation (3) does not exceed 800 ⁇ -cm. This allows abnormal growth
- the total pressure in the chamber 51 at the time of film formation is set to exceed 100 Pa from the viewpoint of obtaining high step coverage.
- the NH gas partial pressure P is
- the NH gas partial pressure P is set to 30 Pa
- the wafer temperature T is set to 400 ° C. As shown in Fig. 6, NH gas flow rate F increases
- hk 3 N may be determined.
- the present embodiment is premised on low-temperature film formation at a film formation temperature of less than 450 ° C. Even in such a low-temperature film formation, it is intended to obtain a TiN film having low specific resistance and good film quality. But TiN film Has a correlation with the wafer temperature T during film formation, and these relationships are as shown in Fig. 7.
- ⁇ gas partial pressure ⁇ is 30 Pa
- film thickness T per cycle is 0.5 nm
- the flow rate F and the wafer temperature T may be determined.
- the film thickness T per cycle is plotted on the horizontal hk axis, and the specific resistance R of the TiN film calculated by the above equation (7) is plotted on the vertical axis.
- Fig. 8 shows the graph shown
- Fig. 9 shows the relationship between the calculated specific resistance and the actual specific resistance.
- FIG. 9 it can be seen that the actual value and the calculated value almost match up to a specific resistance value of the TiN film of up to 800 ⁇ cm.
- the resistivity exceeds 800 ⁇ -cm, the actual value tends to increase more than the calculated value. This is because most of the factors of the resistivity increase up to 800 / z ⁇ -cm are in the film.
- the preferred ranges of the H gas flow rate, the film thickness in one cycle, and the wafer temperature are as follows.
- Wafer temperature 300-450 ° C
- the partial pressure of TiCl gas may be lOPa to lOOPa or less.
- the conditions exemplified in the first embodiment can be adopted.
- the capacitor material of the DRAM memory unit High dielectric constants such as TaO, HfO, HfSiO, PZT, BST, RuO, ReO
- the thickness of the TiN film in the first film forming step may be larger. Further, the film thickness in this case is, for example, 5 to 50 nm in the first film forming step and, for example, 5 to 95 nm in the second film forming step, as in the first embodiment.
- an interlayer insulating film 11 is formed on a NiSi film 10 such as a wiring layer formed on a Si substrate, and a contact hole 12 reaching the NiSi film 10 is formed in the interlayer insulating film 11.
- a Ti thin film 13 is formed in the interlayer insulating film 11 and the contact hole 12, and at the junction between the Ti thin film 13 and the NiSi film 10, Ti from the Ti thin film 13 side and Si from the NiSi film 10 side mutually interact.
- the TiSi portion 10a is formed by diffusion.
- a TiN thin film 14 formed at a low temperature by the method of the present invention is laminated.
- the NiSi film 10 underlying the TiN thin film 14 has low heat resistance and is sensitive to heat. In the present invention, since the TiN thin film 14 is formed at a low temperature of less than 450 ° C., the NiSi film 10 is thermally It is good at receiving damage and can form good contacts.
- a metal wiring layer 16 made of, for example, Cu or W is formed on this TiN thin film 14.
- the metal wiring layer 16 is also filled in the contact hole 12, so that the NiSi film 10 and the metal wiring layer 16 are conducted through the TiSi portion 10a.
- the TiN thin film 14 can be formed while maintaining the low resistance value of the TiSi portion 10a, good electrical conduction between the metal wiring layer 16 and the NiSi film 10 via the TiSi portion 10a is achieved. It should be noted that the present invention can be applied to a case where the base is a CoSi film.
- the impurity diffusion region 20a of the Si substrate 20 has a lower surface made of HSG (hemispherical grained) polycrystalline silicon that has a large surface area (that is, a large charge storage amount of the capacitor) by making the surface uneven.
- the electrode layer 21 is connected, and the upper portion of the lower electrode layer 21 is connected to RTN (Rapid
- an extremely thin SiN barrier layer 22 is formed, and a dielectric layer 23 made of TaO is formed thereon.
- the upper electrode layer 24 made of the formed TiN thin film is formed with a high strength balance including the inside of the concave portion of the dielectric layer 23. Then, a metal wiring layer (not shown) is formed on the upper electrode layer 24.
- Dielectric consisting of Ta O serving as a base when forming upper electrode layer 24 consisting of a TiN thin film
- the TiN film constituting the upper electrode layer 24 can be formed at a low temperature of less than 450 ° C. Sensitive to Insulating layer 23 with high Ta O force maintains good capacitance without being damaged.
- the lower electrode 2 made of polycrystalline silicon having a fin shape with a high aspect ratio is formed of an impurity diffusion region (see FIG. (Not shown).
- the aspect ratio of the fin-shaped lower electrode 21 / is 12 or more, preferably 15-100.
- an ultra-thin SiN barrier layer 22 ' is formed by RTN (Rapid Thermal Nitrization) treatment, and TaO
- a dielectric layer 23 ' is formed, and further thereon, an upper electrode layer 24' made of a TiN thin film formed by the film forming method of the present invention is covered with a high coverage including the inside of the concave portion of the dielectric layer 2. It is composed of Then, a metal wiring layer (not shown) is formed on the upper electrode layer 24 '.
- the TiN film constituting the upper electrode layer 24 ⁇ can be formed at a low temperature of less than 450 ° C, it is possible to form a TaO substrate that is sensitive to heat.
- a lower electrode layer 31 that is also made of amorphous S is connected to the impurity diffusion region 30a of the Si substrate 30.
- RTN Rapid Thermal Nitrization
- a dielectric layer 33 made of TaO is formed via a SiN barrier layer 32 formed by performing the
- An upper electrode layer made of the TiN-based thin film of the present invention is formed. Then, a metal wiring layer (not shown) is formed on the upper electrode layer.
- the dielectric layer 34 since the TiN film constituting the upper electrode layer 34 can be formed at a low temperature of less than 450 ° C, the dielectric layer also has a heat-sensitive TaO force. 33 damage
- the present invention is not limited to the above-described embodiment, but can be variously modified.
- TiCl was used as the Ti-containing compound gas.
- NH was used as the nitrogen-containing reducing gas.
- the present invention can also be applied to a general metal nitride film such as TaN or WN, which is shown in the case where the present invention is applied to TiN film formation.
- a general metal nitride film such as TaN or WN
- other substrates such as a substrate for a liquid crystal display device may be used.
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Abstract
Description
Claims
Priority Applications (3)
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JP2005517080A JP4787020B2 (ja) | 2004-01-15 | 2005-01-14 | 成膜方法 |
US10/585,732 US7776742B2 (en) | 2004-01-15 | 2005-01-14 | Film-forming method |
EP05703623A EP1722405A4 (en) | 2004-01-15 | 2005-01-14 | FILM PRODUCTION PROCESS |
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JP2004008019 | 2004-01-15 | ||
JP2004-008019 | 2004-01-15 |
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WO2005069358A1 true WO2005069358A1 (ja) | 2005-07-28 |
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US (1) | US7776742B2 (ja) |
EP (1) | EP1722405A4 (ja) |
JP (1) | JP4787020B2 (ja) |
KR (1) | KR100762525B1 (ja) |
CN (1) | CN100477097C (ja) |
TW (1) | TW200526806A (ja) |
WO (1) | WO2005069358A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006245306A (ja) * | 2005-03-03 | 2006-09-14 | Renesas Technology Corp | 半導体装置の製造方法 |
WO2007069599A1 (ja) * | 2005-12-12 | 2007-06-21 | Tokyo Electron Limited | 成膜装置のプリコート方法 |
US8937022B2 (en) | 2010-11-29 | 2015-01-20 | Hitachi Kokusai Electric Inc. | Method of manufacturing semiconductor device, substrate processing method and substrate processing apparatus |
US9054206B2 (en) | 2007-08-17 | 2015-06-09 | Semiconductor Energy Laboratory Co., Ltd. | Method for manufacturing semiconductor device |
Families Citing this family (4)
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JP4947922B2 (ja) * | 2005-05-23 | 2012-06-06 | 東京エレクトロン株式会社 | 成膜方法およびコンピュータにより読み取り可能な記憶媒体 |
KR20090094033A (ko) * | 2006-12-28 | 2009-09-02 | 도쿄엘렉트론가부시키가이샤 | 절연막의 형성 방법 및 반도체 장치의 제조 방법 |
US20110216585A1 (en) * | 2010-03-04 | 2011-09-08 | Micron Technology, Inc. | Metal containing materials |
JP6108518B2 (ja) * | 2011-10-20 | 2017-04-05 | 株式会社日立国際電気 | 半導体装置の製造方法、クリーニング方法、基板処理装置及びプログラム |
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- 2005-01-13 TW TW094101013A patent/TW200526806A/zh unknown
- 2005-01-14 WO PCT/JP2005/000384 patent/WO2005069358A1/ja not_active Application Discontinuation
- 2005-01-14 US US10/585,732 patent/US7776742B2/en not_active Expired - Fee Related
- 2005-01-14 KR KR1020067014143A patent/KR100762525B1/ko active IP Right Grant
- 2005-01-14 EP EP05703623A patent/EP1722405A4/en not_active Withdrawn
- 2005-01-14 CN CNB2005800014446A patent/CN100477097C/zh not_active Expired - Fee Related
- 2005-01-14 JP JP2005517080A patent/JP4787020B2/ja not_active Expired - Fee Related
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JPH06283532A (ja) * | 1993-03-26 | 1994-10-07 | Kawasaki Steel Corp | 半導体装置およびその製造方法 |
JPH08250596A (ja) * | 1995-03-04 | 1996-09-27 | Hyundai Electron Ind Co Ltd | 半導体装置の金属配線形成方法 |
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US8937022B2 (en) | 2010-11-29 | 2015-01-20 | Hitachi Kokusai Electric Inc. | Method of manufacturing semiconductor device, substrate processing method and substrate processing apparatus |
Also Published As
Publication number | Publication date |
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KR100762525B1 (ko) | 2007-10-01 |
JP4787020B2 (ja) | 2011-10-05 |
EP1722405A1 (en) | 2006-11-15 |
US20080226823A1 (en) | 2008-09-18 |
TW200526806A (en) | 2005-08-16 |
JPWO2005069358A1 (ja) | 2007-12-27 |
EP1722405A4 (en) | 2009-04-22 |
CN100477097C (zh) | 2009-04-08 |
KR20060113763A (ko) | 2006-11-02 |
US7776742B2 (en) | 2010-08-17 |
CN1906736A (zh) | 2007-01-31 |
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