WO2004083482A1 - 銅合金スパッタリングターゲット及びその製造方法並びに半導体素子配線 - Google Patents
銅合金スパッタリングターゲット及びその製造方法並びに半導体素子配線 Download PDFInfo
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- WO2004083482A1 WO2004083482A1 PCT/JP2004/001914 JP2004001914W WO2004083482A1 WO 2004083482 A1 WO2004083482 A1 WO 2004083482A1 JP 2004001914 W JP2004001914 W JP 2004001914W WO 2004083482 A1 WO2004083482 A1 WO 2004083482A1
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- copper alloy
- alloy sputtering
- copper
- sputtering target
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- 229910000881 Cu alloy Inorganic materials 0.000 title claims abstract description 50
- 238000005477 sputtering target Methods 0.000 title claims abstract description 38
- 239000004065 semiconductor Substances 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title description 19
- 230000008569 process Effects 0.000 title description 5
- 239000010949 copper Substances 0.000 claims abstract description 54
- 229910052802 copper Inorganic materials 0.000 claims abstract description 52
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 50
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 14
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 13
- 238000004544 sputter deposition Methods 0.000 claims abstract description 13
- 229910045601 alloy Inorganic materials 0.000 claims description 36
- 239000000956 alloy Substances 0.000 claims description 36
- 238000004519 manufacturing process Methods 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 15
- 239000001301 oxygen Substances 0.000 claims description 15
- 229910052760 oxygen Inorganic materials 0.000 claims description 15
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 239000012535 impurity Substances 0.000 claims description 11
- 239000013078 crystal Substances 0.000 claims description 9
- 229910052719 titanium Inorganic materials 0.000 claims description 9
- 229910052726 zirconium Inorganic materials 0.000 claims description 9
- 229910052785 arsenic Inorganic materials 0.000 claims description 8
- 229910052793 cadmium Inorganic materials 0.000 claims description 8
- 229910052804 chromium Inorganic materials 0.000 claims description 8
- 239000007789 gas Substances 0.000 claims description 8
- 229910052737 gold Inorganic materials 0.000 claims description 8
- 229910052738 indium Inorganic materials 0.000 claims description 8
- 229910052709 silver Inorganic materials 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 7
- 229910052787 antimony Inorganic materials 0.000 claims description 7
- 230000004888 barrier function Effects 0.000 claims description 7
- 229910052776 Thorium Inorganic materials 0.000 claims description 6
- 229910052770 Uranium Inorganic materials 0.000 claims description 6
- 229910052799 carbon Inorganic materials 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 229910052700 potassium Inorganic materials 0.000 claims description 6
- 229910052708 sodium Inorganic materials 0.000 claims description 6
- 229910001362 Ta alloys Inorganic materials 0.000 claims description 3
- 239000000654 additive Substances 0.000 claims description 3
- 230000000996 additive effect Effects 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 230000002776 aggregation Effects 0.000 abstract description 18
- 238000004220 aggregation Methods 0.000 abstract description 16
- 229910052718 tin Inorganic materials 0.000 abstract description 15
- 229910052782 aluminium Inorganic materials 0.000 abstract description 13
- 239000000463 material Substances 0.000 abstract description 12
- 238000009713 electroplating Methods 0.000 abstract description 3
- 230000015572 biosynthetic process Effects 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 30
- 230000000052 comparative effect Effects 0.000 description 29
- 239000010410 layer Substances 0.000 description 25
- 230000008018 melting Effects 0.000 description 18
- 238000002844 melting Methods 0.000 description 18
- 239000000203 mixture Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 11
- 238000007747 plating Methods 0.000 description 10
- 230000003405 preventing effect Effects 0.000 description 10
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 230000003647 oxidation Effects 0.000 description 8
- 238000007254 oxidation reaction Methods 0.000 description 8
- 239000002245 particle Substances 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 238000013508 migration Methods 0.000 description 4
- 239000000758 substrate Substances 0.000 description 4
- 230000007547 defect Effects 0.000 description 3
- 238000004993 emission spectroscopy Methods 0.000 description 3
- 230000005012 migration Effects 0.000 description 3
- 239000013077 target material Substances 0.000 description 3
- WWSJZGAPAVMETJ-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-ethoxypyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)OCC WWSJZGAPAVMETJ-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 238000005275 alloying Methods 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000005242 forging Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 238000001198 high resolution scanning electron microscopy Methods 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- WOLVEMPZUIFSII-IHHOKICGSA-N (2e,4e)-n-[(2s,5s)-5-(hydroxymethyl)-1-methyl-3-oxo-2-propan-2-yl-2,4,5,6-tetrahydro-1,4-benzodiazocin-8-yl]-5-[4-(trifluoromethyl)phenyl]penta-2,4-dienamide Chemical compound CN([C@H](C(N[C@H](CO)CC1=C2)=O)C(C)C)C1=CC=C2NC(=O)\C=C\C=C\C1=CC=C(C(F)(F)F)C=C1 WOLVEMPZUIFSII-IHHOKICGSA-N 0.000 description 1
- LPZOCVVDSHQFST-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-3-ethylpyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C(=NN(C=1)CC(=O)N1CC2=C(CC1)NN=N2)CC LPZOCVVDSHQFST-UHFFFAOYSA-N 0.000 description 1
- FYELSNVLZVIGTI-UHFFFAOYSA-N 2-[4-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-5-ethylpyrazol-1-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C=1C=NN(C=1CC)CC(=O)N1CC2=C(CC1)NN=N2 FYELSNVLZVIGTI-UHFFFAOYSA-N 0.000 description 1
- YJLUBHOZZTYQIP-UHFFFAOYSA-N 2-[5-[2-(2,3-dihydro-1H-inden-2-ylamino)pyrimidin-5-yl]-1,3,4-oxadiazol-2-yl]-1-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)ethanone Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C1=NN=C(O1)CC(=O)N1CC2=C(CC1)NN=N2 YJLUBHOZZTYQIP-UHFFFAOYSA-N 0.000 description 1
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 description 1
- 239000005751 Copper oxide Substances 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 229910000431 copper oxide Inorganic materials 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000005324 grain boundary diffusion Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- 239000010409 thin film Substances 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
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/34—Sputtering
- C23C14/3407—Cathode assembly for sputtering apparatus, e.g. Target
- C23C14/3414—Metallurgical or chemical aspects of target preparation, e.g. casting, powder metallurgy
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C9/00—Alloys based on copper
- C22C9/01—Alloys based on copper with aluminium as the next major constituent
-
- 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
- H01L21/2855—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 physical means, e.g. sputtering, evaporation
Definitions
- the present invention relates to a copper alloy sputtering target, which can form a stable and uniform seed layer without agglomeration in a wiring material of a semiconductor element, in particular, a copper plating, and has excellent sputter deposition characteristics.
- the present invention relates to a method for manufacturing a target and a semiconductor element wiring formed by the same method. Background art
- A1 resistivity of about 3.1 ⁇ ⁇ cm
- copper wiring with a lower resistance has been put to practical use.
- a diffusion barrier layer such as Ta / TaN is formed in a contact hole or a recess of a wiring groove.
- a copper or copper alloy is generally formed as a sputtering layer as an underlayer (seed layer).
- high-purity copper with a purity of 5N to 6N is produced by a wet or dry purification process using electrolytic copper with a purity of about 4N (without gas components) as a crude metal, and this is used as a sputtering target.
- electrolytic copper with a purity of about 4N (without gas components) as a crude metal
- this is used as a sputtering target.
- the thickness of the seed layer becomes an extremely thin film of 100 nm or less.
- a seed layer is formed using an N pure copper target, coagulation occurs and a good seed layer cannot be formed.Therefore, by adding 0.5 to 4.0 wt% of A1 or Sn, I thought about preventing it.
- the conventional technology has not obtained a copper alloy capable of forming a stable and uniform seed layer with high conductivity at the time of wiring material of a semiconductor element, particularly copper electric plating, and is not necessarily sufficient. I wouldn't say. Disclosure of the invention
- the present invention can provide a wiring material for a semiconductor element, particularly a conductive material required for copper electric plating, which has a very good conductivity, has no aggregation, and can form a stable and uniform seed layer. It is an object of the present invention to provide a copper alloy sputtering target excellent in film forming characteristics, a method of manufacturing the target, and a semiconductor element wiring formed using the target.
- the present inventors have conducted intensive studies, and as a result, by adding an appropriate amount of a metal element, the generation of defects such as matter, hillocks, and breaks in copper electric plating has been achieved. Copper alloy sputtering that can form a stable and uniform seed layer that has low resistivity, low electro-migration and oxidation resistance. It has been found that it is possible to obtain a semiconductor device wiring formed by using the same manufacturing method and the same method.
- the present invention is based on this finding,
- At least one element selected from A1 or Sn is contained in an amount of 0.01 to 0.5 (less than) wt%, and either or both of Mn and Si are 0.25w tp pm or less in total.
- Copper alloy sputtering target characterized by containing
- a copper alloy sputtering target containing at least one element selected from A1 or Sn in an amount of 0.05 to 0.2 wt% and containing Mn or Si in a total amount of 0.25 wtppm or less.
- the above 1 or 2 characterized in that it contains one or more selected from Sb, Zr, Ti, Cr, Ag, Au, Cd, In and As in a total amount of 0.3 wt ppm or less.
- the described copper alloy sputtering target 6. The copper alloy sputtering target according to any one of the above items 1 to 5, characterized in that unavoidable impurities other than gas components are 1 Owt ppm or less.
- Na and K are below 0.05wtppm each, U and Th are below lwtppb, oxygen 5wtppm and below, nitrogen 2wtppm and below, carbon 2wtppm and below. Any of the copper alloy spatter rings listed
- the semiconductor element wiring as described in 12 above which is formed as a seed layer on a barrier film of Ta, Ta alloy or a nitride thereof.
- a master alloy of the additive element is prepared, and is dissolved in a molten metal of copper or a low-concentration master alloy to form an ingot, and the ingot is processed and used as a target.
- the copper alloy sputtering target of the present invention contains at least one element selected from A1 or Sn in an amount of 0.01 to 0.5 (less than) wt%, preferably 0.05 to 0.2 wt%. , Mn or Si should not exceed 0.25 wt p pm in total.
- the sheet resistance can be kept low, and a stable and uniform seed layer having high oxidation resistance can be formed. It also has excellent sputter deposition characteristics, and is useful as a wiring material for semiconductor devices.
- the content is less than 0.05 wt%, the dispersion of the composition becomes large when the alloy is produced, and the effect of preventing agglomeration is reduced.On the other hand, if the content is 0.5 wt% or more, the sheet resistance of the sputter film increases, and It becomes difficult to obtain a target that matches the purpose. Another problem is that the oxygen content increases with the increase in Al and Sn during melting in the copper alloy manufacturing process.
- the inclusion of Mn and Si improves oxidation resistance.
- Mn and Si themselves do not have the effect of preventing coagulation, and if the content exceeds 25 wt ppm, the sheet resistance increases, so that the content must be 0.25 wt ppm or less.
- Mn and Si are easily mixed from A1 and Sn as raw materials for dissolution, so the management of the components of Mn and Si is important.
- the copper alloy sputtering target of the present invention is preferably a total of 0.5 wt ppm or less of one or more selected from Sb, Zr, Ti, Cr, Ag, Au, Cd, In, and As. Can be contained up to 0.3w tp pm.
- unavoidable impurities other than gas components are lOwtppm or less, preferably lwtppm or less. These impurities increase the sheet resistance and reduce the action of preventing Al and Sn from agglomerating, that is, reduce the wettability with the barrier film.
- the impurities Na and K are each 0.05% by weight or less, preferably 0.02% by weight or less, U and Th are each 1% by weight or less, preferably 0.5% by weight or less, and oxygen 5% by weight or less, preferably 1% or less.
- the impurities such as the alkali metal elements Na and K and the radioactive elements U and Th have an adverse effect on the semiconductor characteristics even in a very small amount, so that it is desirable to keep them in the above range.
- the gas components of oxygen, nitrogen, and carbon contained in the copper alloy sputtering target of the present invention form inclusions at crystal grain boundaries and cause particles to be generated. Therefore, it is desirable to reduce it as much as possible because of the problem of causing the generation of particles.
- the average crystal grain size be 10 Om or less and the variation of the average grain size be within ⁇ 20%.
- the uniformity (thickness uniformity) of the film can be improved through the sputter life, and the uniformity of the film composition can be improved.
- wafer sizes exceed 30 Omm, film uniformity becomes more important.
- the copper alloy sputtering target of the present invention is useful for manufacturing a semiconductor element wiring, particularly for forming a seed layer of a semiconductor wiring, and further for forming a seed layer on a barrier film of Ta, a Ta alloy or a nitride thereof.
- Ideal for Particularly problematic in the production of the copper alloy sputtering target of the present invention is that the addition amount of the added elements Sn and A1 is extremely low, so that the composition varies in the production stage of the copper alloy ingot. That is.
- elements having a low melting point and a low specific gravity tend to evaporate or scatter when added to a molten copper.
- the specific gravity is so small that the prayer in the ingot becomes large.
- impurities from addition elements of .Sn and A 1 are often mixed, and it is difficult to produce a high-quality copper alloy target.
- a single-phase master alloy having a high melting point of about 800 ° C. and within the solid solubility limit is produced, and this is melted in a molten copper or low-concentration master alloy to form an ingot. Since the melting point is high, impurities such as oxygen can be effectively reduced.
- a stable low-concentration copper alloy ingot can be manufactured by measuring the additive element concentration of this master alloy and melting and adding it to pure copper or a low-concentration copper mother alloy.
- high-purity copper with a purity of 6 N or more and the above-mentioned copper mother alloy are prepared and melted in a high vacuum atmosphere by a cold crucible melting method of a water-cooled copper crucible to obtain a high-purity alloy. It is necessary to control the amount of the added element by the copper mother alloy sufficiently.
- a high-purity graphite crucible can also be used.
- the alloyed alloy is immediately poured into a water-cooled copper mold in a high vacuum atmosphere to obtain an ingot.
- the structure of the ingot for example, the crystal grain size, the spattering characteristics can be improved.
- the manufactured ingot is subjected to hot forging, hot rolling, cold rolling, and heat treatment steps after removing the surface layer to obtain a target material.
- This target material is further machined into a predetermined shape, and joined to a packing plate to obtain an overnight get product. Examples and comparative examples
- High-purity copper with a purity of 6 N or more and a copper mother alloy (Al, Sn, Mn, Si, and other added elements) were prepared and melted in a high-vacuum atmosphere using a cold-crucible melting method in a water-cooled copper crucible. An alloy was obtained. Table 1 shows the adjusted alloy compositions of Examples 1 to 10. During this melting, a 6N-purity copper plate was placed at the bottom of the crucible to reduce contamination due to contact with the molten metal. The alloyed melt was poured into a water-cooled copper mold in a high vacuum atmosphere to obtain an ingot.
- the average particle size was measured by a cutting method based on JISHO 501.
- the target was 17 points concentrically in the plane direction and 3 points in the sheet thickness direction: front, center and back, a total of 17 X
- a sputtered film having a thickness of 100 nm was formed on an 8-inch TaN / Ta / Si substrate.
- the degree of aggregation of the sputtered film was observed with a high-resolution SEM.
- a sputtering film was formed to a thickness of about 500 nm on the Si substrate, and the uniformity of the film was measured.
- Table 1 shows the oxygen content, average crystal grain size, cohesiveness, and film thickness uniformity (3 ⁇ (%)) of the above results, along with the component composition of the target.
- the oxygen content is low
- the average crystal grain size is 100 im or less
- the variation of the average grain size is within ⁇ 20%.
- Example 1 0.02 wt% AI 0.05 0.13 ⁇ 5 96 19
- Example 2 0.05 wt% AI 0.07 0.002 0.25 5 70 13
- Example 3 0.106wt% AI 0.09 ⁇ 0.001 0.16 ⁇ 1 85
- Example 4 0.213wt% AI 0.11 ⁇ 0.001 0.32 46 13
- Example 5 0.427 wt% AI 0.19 0.05 0.32 ⁇ 1 61
- Example 6 0.02 wt% Sn 0.01 0.03 0.26 ⁇ 5 52 17.
- Example 7 0.05 wt ° / oSn 0.05 0.17 0.29 5 36 18
- Example 8 0.1 wt% Sn 0.03 0.10 .0.16 ⁇ 1 61 18
- Example 9 0.25 wt% Sn ⁇ 0.01 0.22 0.46 ⁇ 14419
- Example 10 0.5wt% Sn ⁇ 0.01 0.21 0.32 ⁇ 1 27 13 Comparative Example 1 ⁇ 0.008wt% Al 0.03 ⁇ 0.001 0.17 ⁇ 5 63 15 Comparative Example 2 0.86wt% AI 0.61 0.13 0.34 ⁇ 5 22 9 Comparative Example 3 0.213wt% AI .0.36 0.05 0.53 ⁇ 5 43 11 Comparative Example 4 0.427wt% AI 0.19 0.05 0.32 10 21 34 Comparative Example 5 0.005wt% Sn 0.01 0.03 0.22 ⁇ 5 91 17 Comparative Example 6 1.Owt% Sn 0.03 0.75 0.23 ⁇ 5 43 15 Comparative Example 0.25wt% Sn 0.05 0.45 0.71 ⁇
- a copper alloy target was prepared for each of the same alloying components under the same manufacturing conditions as in the example, but for a material out of the scope of the present invention, without using a master alloy and changing the particle size and variation. did.
- Table 1 also shows these conditions.
- a sputtered film having a thickness of 100 nm was formed on an 8-inch TaN / Ta / Si substrate by using the thus obtained target. The degree of aggregation of the sputtered film was observed with a high-resolution SEM. In addition, sputtering was performed to a thickness of about 500 nm on the Si substrate, and the uniformity of the film was measured.
- Table 1 also shows the oxygen content, average crystal grain size, cohesiveness, and film thickness uniformity (3 ⁇ (%)) of the results of Comparative Examples 18 to 18 together with the target component composition.
- Comparative Example 1 the content of A1 was 0.008 wt%, the effect of preventing aggregation was low, and the cohesion was strong.
- Comparative Example 2 the content of 81 exceeded 0.50 wt%, the Si increased, the recrystallization temperature was high, and the aggregation preventing effect was low. Further, as shown in Comparative Example 3, when Si is high (exceeding 0.25 ppm), the effect of preventing aggregation is reduced.
- Comparative Example 5 the Sn content was less than 0.02 wt%, so that the effect of preventing aggregation was low, and strong aggregation was exhibited. Conversely, in Comparative Example 6, the Sn content exceeded 0.5 wt%, Mn increased at the same time, the recrystallization temperature was high, and the cohesion was strong. As shown in Comparative Example 7, when the content of Mn is high, the effect of preventing aggregation is reduced.
- the mother alloy was prepared by a cold crucible melting method in a vacuum atmosphere.
- the aluminum content of this mother alloy (copper) was 4.632 wt%, which was within the solid solubility limit.
- the liquidus temperature of this master alloy is about 1060 ° C.
- 6N-grade high-purity copper is melted at about 1400 ° C by a cold crucible melting method, and the mother alloy is added so as to be 0.106 wt%. About 11 50-1400 ° C
- Ngot was made. In the same way, ingots were made 5 times in total.
- Target composition Mother alloy composition From target composition
- Example 11-1 0.106wt% 4.632wt% 1.33%
- Example 11-2 0.106wt% 4.632wt% -4.36%
- Example 11-3 0.106wt% 4.632wt% -3.97%
- Example 11-4 0.06wt% 4.632wt% -0.26%
- Example 11-5 0.106wt% 4.632wt% 1.98%
- Comparative Example 91 1 0.106wt% -9.30%
- a mother alloy was prepared by a cold crucible melting method.
- the aluminum content of this mother alloy (copper) was set to 31.33 wt%, which exceeds the solid solubility limit.
- the liquidus temperature of this master alloy is about 800 ° C.
- the mother alloy must have a melting point (liquidus temperature) of 800 ° C or higher, preferably about 1000 ° C, and a single-phase alloy (a composition range within the solid solubility limit of aluminum or tin) is suitable. I found out.
- a melting point liquidus temperature
- a single-phase alloy a composition range within the solid solubility limit of aluminum or tin
- the present invention provides a wiring material for a conductive element, particularly a copper sheet having a small sheet resistance and no cohesion, capable of forming a stable and uniform seed layer, It has an excellent effect of being able to obtain an alloy sputtering target and a method for manufacturing the same and a semiconductor element wiring formed by the same.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Vapour Deposition (AREA)
- Electrodes Of Semiconductors (AREA)
- Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE602004032015T DE602004032015D1 (de) | 2003-03-17 | 2004-02-19 | Verfahren zur herstellung eines kupferlegierungssputtertargets |
JP2005503638A JP4223511B2 (ja) | 2003-03-17 | 2004-02-19 | 銅合金スパッタリングターゲット及びその製造方法並びに半導体素子配線 |
EP04712732A EP1602747B1 (en) | 2003-03-17 | 2004-02-19 | Process for producing copper alloy sputtering target |
US10/549,440 US7740721B2 (en) | 2003-03-17 | 2004-02-19 | Copper alloy sputtering target process for producing the same and semiconductor element wiring |
US12/778,283 US9765425B2 (en) | 2003-03-17 | 2010-05-12 | Copper alloy sputtering target, process for producing the same and semiconductor element wiring |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003071721 | 2003-03-17 | ||
JP2003-71721 | 2003-03-17 |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10549440 A-371-Of-International | 2004-02-19 | ||
US12/778,283 Continuation US9765425B2 (en) | 2003-03-17 | 2010-05-12 | Copper alloy sputtering target, process for producing the same and semiconductor element wiring |
Publications (1)
Publication Number | Publication Date |
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WO2004083482A1 true WO2004083482A1 (ja) | 2004-09-30 |
Family
ID=33027699
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/001914 WO2004083482A1 (ja) | 2003-03-17 | 2004-02-19 | 銅合金スパッタリングターゲット及びその製造方法並びに半導体素子配線 |
Country Status (8)
Country | Link |
---|---|
US (2) | US7740721B2 (ja) |
EP (2) | EP2264215A3 (ja) |
JP (1) | JP4223511B2 (ja) |
KR (1) | KR100700885B1 (ja) |
CN (1) | CN100439558C (ja) |
DE (1) | DE602004032015D1 (ja) |
TW (1) | TWI248468B (ja) |
WO (1) | WO2004083482A1 (ja) |
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JP2009149990A (ja) * | 2008-12-24 | 2009-07-09 | Nippon Mining & Metals Co Ltd | 高純度形状記憶合金ターゲット及び同合金薄膜 |
JP2010502841A (ja) * | 2006-09-08 | 2010-01-28 | トーソー エスエムディー,インク. | 非常に小さな結晶粒径と高エレクトロマイグレーション抵抗とを有する銅スパッタリングターゲットおよびそれを製造する方法 |
WO2010038642A1 (ja) | 2008-09-30 | 2010-04-08 | 日鉱金属株式会社 | 高純度銅又は高純度銅合金スパッタリングターゲット、同スパッタリングターゲットの製造方法及び高純度銅又は高純度銅合金スパッタ膜 |
WO2010038641A1 (ja) | 2008-09-30 | 2010-04-08 | 日鉱金属株式会社 | 高純度銅及び電解による高純度銅の製造方法 |
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- 2004-02-19 JP JP2005503638A patent/JP4223511B2/ja not_active Expired - Lifetime
- 2004-02-19 EP EP04712732A patent/EP1602747B1/en not_active Expired - Lifetime
- 2004-02-19 CN CNB2004800074372A patent/CN100439558C/zh not_active Expired - Lifetime
- 2004-02-19 WO PCT/JP2004/001914 patent/WO2004083482A1/ja active Application Filing
- 2004-02-19 DE DE602004032015T patent/DE602004032015D1/de not_active Expired - Lifetime
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Cited By (18)
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JP2007051351A (ja) * | 2005-08-19 | 2007-03-01 | Mitsubishi Materials Corp | パーティクル発生の少ないMn含有銅合金スパッタリングターゲット |
WO2008018490A1 (en) * | 2006-08-10 | 2008-02-14 | Ulvac, Inc. | Method for forming conductive film, thin film transistor, panel with thin film transistor, and method for manufacturing thin film transistor |
US8119462B2 (en) | 2006-08-10 | 2012-02-21 | Ulvac, Inc. | Method for forming conductive film, thin-film transistor, panel with thin-film transistor, and method for manufacturing thin-film transistor |
JP2010502841A (ja) * | 2006-09-08 | 2010-01-28 | トーソー エスエムディー,インク. | 非常に小さな結晶粒径と高エレクトロマイグレーション抵抗とを有する銅スパッタリングターゲットおよびそれを製造する方法 |
EP3128039A1 (en) | 2008-09-30 | 2017-02-08 | JX Nippon Mining & Metals Corp. | High-purity copper sputtering target or high-purity copper alloy sputtering target |
WO2010038642A1 (ja) | 2008-09-30 | 2010-04-08 | 日鉱金属株式会社 | 高純度銅又は高純度銅合金スパッタリングターゲット、同スパッタリングターゲットの製造方法及び高純度銅又は高純度銅合金スパッタ膜 |
WO2010038641A1 (ja) | 2008-09-30 | 2010-04-08 | 日鉱金属株式会社 | 高純度銅及び電解による高純度銅の製造方法 |
JP2009149990A (ja) * | 2008-12-24 | 2009-07-09 | Nippon Mining & Metals Co Ltd | 高純度形状記憶合金ターゲット及び同合金薄膜 |
JP2011044674A (ja) * | 2009-08-24 | 2011-03-03 | Mitsubishi Materials Corp | 半導体装置、その製造方法及びその製造方法に用いるスパッタリングターゲット |
JP2012149294A (ja) * | 2011-01-18 | 2012-08-09 | Hitachi Cable Ltd | スパッタリングターゲット、半導体装置および半導体装置の製造方法 |
JP2013014808A (ja) * | 2011-07-05 | 2013-01-24 | Mitsubishi Materials Corp | 銅合金製スパッタリングターゲット |
WO2013038983A1 (ja) * | 2011-09-14 | 2013-03-21 | Jx日鉱日石金属株式会社 | 高純度銅マンガン合金スパッタリングターゲット |
WO2013038962A1 (ja) * | 2011-09-14 | 2013-03-21 | Jx日鉱日石金属株式会社 | 高純度銅マンガン合金スパッタリングターゲット |
JP5329726B2 (ja) * | 2011-09-14 | 2013-10-30 | Jx日鉱日石金属株式会社 | 高純度銅マンガン合金スパッタリングターゲット |
JPWO2013038962A1 (ja) * | 2011-09-14 | 2015-03-26 | Jx日鉱日石金属株式会社 | 高純度銅マンガン合金スパッタリングターゲット |
US9090970B2 (en) | 2011-09-14 | 2015-07-28 | Jx Nippon Mining & Metals Corporation | High-purity copper-manganese-alloy sputtering target |
KR20170005146A (ko) | 2013-03-07 | 2017-01-11 | 제이엑스금속주식회사 | 구리 합금 스퍼터링 타깃 |
KR20200021106A (ko) | 2013-03-07 | 2020-02-27 | 제이엑스금속주식회사 | 구리 합금 스퍼터링 타깃 |
Also Published As
Publication number | Publication date |
---|---|
JP4223511B2 (ja) | 2009-02-12 |
KR20050108384A (ko) | 2005-11-16 |
EP1602747B1 (en) | 2011-03-30 |
CN1771349A (zh) | 2006-05-10 |
EP2264215A3 (en) | 2011-03-16 |
TW200422415A (en) | 2004-11-01 |
KR100700885B1 (ko) | 2007-03-29 |
DE602004032015D1 (de) | 2011-05-12 |
JPWO2004083482A1 (ja) | 2006-06-22 |
US7740721B2 (en) | 2010-06-22 |
CN100439558C (zh) | 2008-12-03 |
EP1602747A4 (en) | 2008-08-27 |
US9765425B2 (en) | 2017-09-19 |
EP1602747A1 (en) | 2005-12-07 |
EP2264215A2 (en) | 2010-12-22 |
TWI248468B (en) | 2006-02-01 |
US20060088436A1 (en) | 2006-04-27 |
US20100219070A1 (en) | 2010-09-02 |
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