WO2006082718A1 - 誘電体膜及びその形成方法 - Google Patents
誘電体膜及びその形成方法 Download PDFInfo
- Publication number
- WO2006082718A1 WO2006082718A1 PCT/JP2006/300838 JP2006300838W WO2006082718A1 WO 2006082718 A1 WO2006082718 A1 WO 2006082718A1 JP 2006300838 W JP2006300838 W JP 2006300838W WO 2006082718 A1 WO2006082718 A1 WO 2006082718A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- nitriding
- radical
- species
- dielectric film
- mixed gas
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 46
- 238000005121 nitriding Methods 0.000 claims description 55
- 239000007789 gas Substances 0.000 claims description 49
- 150000003254 radicals Chemical class 0.000 claims description 45
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 44
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 44
- 238000000137 annealing Methods 0.000 claims description 30
- 229910052710 silicon Inorganic materials 0.000 claims description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 25
- 239000010703 silicon Substances 0.000 claims description 25
- 239000000758 substrate Substances 0.000 claims description 23
- 239000004065 semiconductor Substances 0.000 claims description 17
- 230000008569 process Effects 0.000 claims description 16
- 230000015572 biosynthetic process Effects 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- -1 ion radical Chemical class 0.000 claims description 10
- 229910021420 polycrystalline silicon Inorganic materials 0.000 claims description 10
- 230000005284 excitation Effects 0.000 claims description 9
- 150000002500 ions Chemical class 0.000 claims description 9
- 239000011261 inert gas Substances 0.000 claims description 7
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 claims description 2
- 238000009826 distribution Methods 0.000 abstract description 10
- 238000009792 diffusion process Methods 0.000 abstract description 8
- 230000006866 deterioration Effects 0.000 abstract description 7
- 230000002265 prevention Effects 0.000 abstract 2
- DYCJFJRCWPVDHY-LSCFUAHRSA-N NBMPR Chemical compound O[C@@H]1[C@H](O)[C@@H](CO)O[C@H]1N1C2=NC=NC(SCC=3C=CC(=CC=3)[N+]([O-])=O)=C2N=C1 DYCJFJRCWPVDHY-LSCFUAHRSA-N 0.000 abstract 1
- 239000010408 film Substances 0.000 description 78
- 210000002381 plasma Anatomy 0.000 description 35
- 150000004767 nitrides Chemical class 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000009467 reduction Effects 0.000 description 5
- 238000000151 deposition Methods 0.000 description 4
- 230000008021 deposition Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 229910052581 Si3N4 Inorganic materials 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000002186 photoelectron spectrum Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L29/00—Semiconductor devices specially adapted for rectifying, amplifying, oscillating or switching and having potential barriers; Capacitors or resistors having potential barriers, e.g. a PN-junction depletion layer or carrier concentration layer; Details of semiconductor bodies or of electrodes thereof ; Multistep manufacturing processes therefor
- H01L29/40—Electrodes ; Multistep manufacturing processes therefor
- H01L29/43—Electrodes ; Multistep manufacturing processes therefor characterised by the materials of which they are formed
- H01L29/49—Metal-insulator-semiconductor electrodes, e.g. gates of MOSFET
- H01L29/51—Insulating materials associated therewith
- H01L29/518—Insulating materials associated therewith the insulating material containing nitrogen, e.g. nitride, oxynitride, nitrogen-doped material
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02321—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer
- H01L21/02329—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer introduction of nitrogen
- H01L21/02332—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment introduction of substances into an already existing insulating layer introduction of nitrogen into an oxide layer, e.g. changing SiO to SiON
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/02126—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC
- H01L21/0214—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material containing Si, O, and at least one of H, N, C, F, or other non-metal elements, e.g. SiOC, SiOC:H or SiONC the material being a silicon oxynitride, e.g. SiON or SiON:H
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02109—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates
- H01L21/02112—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer
- H01L21/02123—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon
- H01L21/0217—Forming insulating materials on a substrate characterised by the type of layer, e.g. type of material, porous/non-porous, pre-cursors, mixtures or laminates characterised by the material of the layer the material containing silicon the material being a silicon nitride not containing oxygen, e.g. SixNy or SixByNz
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02337—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02296—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer
- H01L21/02318—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment
- H01L21/02337—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour
- H01L21/0234—Forming insulating materials on a substrate characterised by the treatment performed before or after the formation of the layer post-treatment treatment by exposure to a gas or vapour treatment by exposure to a plasma
-
- 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
- H01L21/28008—Making conductor-insulator-semiconductor electrodes
- H01L21/28017—Making conductor-insulator-semiconductor electrodes the insulator being formed after the semiconductor body, the semiconductor being silicon
- H01L21/28158—Making the insulator
- H01L21/28167—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation
- H01L21/28202—Making the insulator on single crystalline silicon, e.g. using a liquid, i.e. chemical oxidation in a nitrogen-containing ambient, e.g. nitride deposition, growth, oxynitridation, NH3 nitridation, N2O oxidation, thermal nitridation, RTN, plasma nitridation, RPN
-
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/318—Inorganic layers composed of nitrides
- H01L21/3185—Inorganic layers composed of nitrides of siliconnitrides
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02236—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor
- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
-
- 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
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/314—Inorganic layers
- H01L21/3143—Inorganic layers composed of alternated layers or of mixtures of nitrides and oxides or of oxinitrides, e.g. formation of oxinitride by oxidation of nitride layers
- H01L21/3144—Inorganic layers composed of alternated layers or of mixtures of nitrides and oxides or of oxinitrides, e.g. formation of oxinitride by oxidation of nitride layers on silicon
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
- Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
- Y10T428/264—Up to 3 mils
- Y10T428/265—1 mil or less
Definitions
- the present invention relates to a dielectric film such as an oxide film, a nitride film, or an oxynitride film formed on a silicon substrate, a method for forming the dielectric film, a semiconductor device using the dielectric film, and a method for manufacturing the semiconductor device.
- a dielectric film such as an oxide film, a nitride film, or an oxynitride film formed on a silicon substrate
- polysilicon poly-Si
- B boron
- the silicon oxide film is not nitrided, but the silicon substrate is nitrided, and N is distributed at the silicon oxide film / silicon substrate interface.
- Non-Patent Document 3 N. Kimizuka, K. Yamaguchi, K. Imai, T. Iisuka, CT Liu, RC Keller and T. Horiuchi, Symp. VLSI Tech. 2000, p. 92) .reference). Therefore, a radical oxide film that can introduce N only on the surface side of the silicon oxide film is drawing attention.
- Radical oxide is a method in which N2 gas diluted with Ar gas is irradiated with microwaves, plasma is generated, and a silicon oxide film is nitrided by free radicals having high reactivity.
- the silicon oxide film prepared by this method introduces N on the surface side, it has the effect of preventing the diffusion of B into the silicon oxide film and suppressing the deterioration of the NBTI characteristics. is there.
- the thickness of the silicon oxide film is required to be an ultra-thin film with a thickness of 1.5 ° or less. For this reason, it is very difficult to prevent N from being introduced at all at the silicon oxide film / silicon substrate interface, and deterioration of NBTI characteristics has become a problem.
- the XPS Nls core level spectrum of the Ar / N2 radical oxynitride film shows a peak indicating Si3 ⁇ N bond (all three bonds of N are bonded to Si).
- a peak related to another bond (hereinafter referred to as Nhigh) is observed on the high bond energy side.
- This peak is also detected in the SiN film obtained by Ar / N2 radical nitridation of the Si substrate (Fig. 1 (b)), so it is not a bond with 0 but a bond with Si and N, but Si3 ⁇ It can be seen that this is an unstable bond that could not form N.
- the silicon oxide film (Fig. 1 (c)) thermally nitrided with NO gas and the Si3N4 film (Fig. 1 (d)) formed by CVD have a bond unique to radical nitriding that is not observed at all. is there.
- Nhigh is completely post-annealed as shown in Fig. 2 (b) and Fig. 3.
- nitriding species that form Nhigh penetrate deeper than nitriding species that form Si ⁇ N.
- Si ⁇ N has a tail at the bottom of the distribution as the base film thickness decreases.
- the nitriding species forming Nhigh (hereinafter N) represents Si ⁇ N.
- Nhigh Even if Nhigh can be removed by annealing, the existence of the nitriding species N forming Nhigh is a problem.
- Nhigh cannot form stable Si3 ⁇ N and is in an unstable bonding state, but when it is desorbed by annealing, it generates a fixed charge due to silicon dangling bonds. For this reason, it can be a factor that degrades the insulation characteristics such as an increase in leakage current. Therefore, it is strongly desired that the film be formed under the condition that the nitriding species forming Nhigh is not present in the plasma.
- the present invention has been made to solve the above-mentioned problems, and its object is to suppress the generation of Nhigh-forming nitrides in the plasma, and in the Nhigh silicon oxide film.
- the N concentration on the surface of the dielectric film is 3 atomic% or more, and the silicon surface and the dielectric are The N concentration present at the film interface is 0.1 atomic% or less and the film thickness force is ⁇ nm or less.
- a semiconductor device comprising a silicon substrate, a dielectric film formed on the surface of the silicon substrate, and an electrode formed on the dielectric film, N on the surface of the dielectric film It is characterized in that the concentration is 3 atomic% or more, the N concentration force existing at the interface between the silicon surface and the dielectric film is .1 atomic% or less, and the film thickness is 2 nm or less.
- a step of forming a silicon oxide film on the surface of a silicon substrate, and a surface of the silicon oxide film are formed of a nitriding radical species, a nitriding property
- a step of exposing to and modifying the nitrided species such as excited active species and nitrided ion species.
- a step of forming a silicon oxide film on the surface of a silicon substrate, and the surface of the silicon oxide film are formed with nitriding radical species, nitriding excitation activity.
- the method includes a step of exposing and modifying a nitride species such as a seed and a nitride ion species, and a step of forming a gate electrode on the surface of the modified silicon oxide film.
- the nitriding radical species is at least one radical selected from the group consisting of N radical, N + ion radical, N2 radical, N2 + ion radical, NH radical and NH + ion radical. preferable.
- the nitriding radical is, for example, a mixed gas of Ar and NH, a mixed gas of Xe and N, Kr
- N mixed gas Xe and NH mixed gas, Kr and NH mixed gas, Ar, N and H mixed gas,
- the step of exposing the surface of the silicon oxide film to a nitriding radical to modify the surface is 600.
- the generation efficiency in the plasma of the nitriding species forming Nhigh is reduced.
- Xe or Kr gas is used instead of Ar in order to reduce the generation efficiency in the plasma of the nitriding species forming Nhigh, and radical nitridation with Xe / N gas or Kr / N gas is used.
- Nhigh can be drastically reduced as shown in Figs. 7 (a) to (e).
- (a) is when N / Ar plasma is used, and (b) is NH / Ar plasma.
- FIG. 8 plots the amount of Si3 ⁇ N formed on the horizontal axis and the amount of Nhigh plotted on the vertical axis when the nitriding time was changed using each gas.
- Nhigh is formed more than Ar / N.
- the minimum annealing condition that prevents the Si3 ⁇ N distribution from spreading to the interface side due to 02 annealing and that can completely remove Nhigh is 500 to 600 in vacuum or in an inert gas. It is.
- the CVD deposition temperature of poly-Si in the next process is a typical temperature of about 500 to 600 ° C
- the post-annealing process can be omitted by serving as a bri-anneal for poly-Si deposition. can do.
- the number of nitrides N forming Nhigh is reduced, and the formation of Si ⁇ N at the interface can be suppressed. Also, ⁇
- plasma generated by RLSA may have an electron temperature of 1 eV or less.
- the amount of Si3 ⁇ N formed in the vicinity of the interface is reduced and the deterioration of the NBTI characteristics is suppressed by reducing the generation efficiency in the plasma of the nitriding species forming Nhigh. Is possible.
- SiN film surface formed by radical nitridation of silicon (c) Silicon oxide film thermally nitrided with NO gas (D) XPS Nls core level photoelectron spectrum of (d) Si N film surface formed by thermal CVD.
- FIG. 1 A first figure.
- FIG. 4 is a diagram showing a graph showing the annealing temperature dependence of Nhigh formation amount.
- Si ⁇ N is formed in radical nitriding of silicon oxide film by Ar / N plasma.
- Nitride species that form Nhigh and Nhigh species that form Nhigh and when the film thickness is reduced, the Nhigh-forming nitride species first reaches the vicinity of the interface and forms a reaction of Si ⁇ N.
- FIG. 5 is a diagram showing an XPS Nls core level photoelectron spectrum on the surface of the oxide film.
- FIG. 8 is a diagram quantitatively showing that Nhigh in FIG. 7 is decreasing.
- FIG. 11 This figure shows that plasma generated by parallel plates does not damage the gate insulating film, but plasma generated by low electron temperature RLSA does not damage the gate insulating film. is there.
- FIG. 12 is a diagram showing an apparatus for performing radical nitridation by plasma using RLSA in the first embodiment.
- the processing substrate 1 is set on the sample stage 2 in the processing chamber 10. Heating mechanism 3 raises the substrate temperature to 400 ° C.
- the processing chamber 10 is evacuated by an exhaust pump 11, and a rare gas recovery device 12 is connected.
- the microwave generated by the microwave generator 20 is guided to the RLSA 22 through the waveguide 21.
- a dielectric plate 23 is installed under the RLSA 22, and a process gas is introduced immediately below it, and plasma with an electron temperature of 1 eV or less is generated by microwaves. Radicals generated by this plasma diffuse in the direction of the substrate 1 through the shower plate 24 and nitride the substrate 1 uniformly in the plane. Even if gas is introduced from the process gas inlet 14 without using the shower plate 24, the N reduction effect is not affected.
- Process gas is Xe / N, Kr / N, Ar / N high 2 2
- the substrate 1 is heated at 400 ° C or lower. Post-annealing is not performed, but in the next poly-Si CVD furnace, annealing is performed at 500 to 600 ° C in vacuum or in an inert gas, and poly-Si film formation continues. This annealing at 500 to 600 ° C is a process necessary for the complete removal of Nhigh, but it also reduces the number of processes by combining it with bri-annealing for poly-Si deposition. If electrodes other than poly-Si are used, annealing at 500 to 600 is required separately. Industrial applicability
- the present invention by reducing the generation efficiency in the plasma of the nitriding species forming Nhigh, the amount of Si3 ⁇ N formed in the vicinity of the interface can be reduced, and deterioration of the NBTI characteristics can be suppressed. It will be possible.
- the formation amount of Nhigh is reduced, it is possible to suppress the generation of fixed charges formed on the traces where Nhigh is desorbed by annealing, and the improvement of insulation characteristics such as reduction of leakage current and reduction of dielectric breakdown life is realized.
- the present invention can be applied to a VLSI capable of thinning a silicon oxide film and realizing high performance.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Crystallography & Structural Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Plasma & Fusion (AREA)
- Formation Of Insulating Films (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/883,421 US20080187747A1 (en) | 2005-02-01 | 2006-01-20 | Dielectric Film and Method of Forming the Same |
EP06712063A EP1852904A4 (en) | 2005-02-01 | 2006-01-20 | DIELECTRIC FILM AND METHOD FOR THE PRODUCTION THEREOF |
CN2006800031840A CN101120437B (zh) | 2005-02-01 | 2006-01-20 | 电介质膜及其形成方法 |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005-025648 | 2005-02-01 | ||
JP2005025648 | 2005-02-01 | ||
JP2005257946A JP2006245528A (ja) | 2005-02-01 | 2005-09-06 | 誘電体膜及びその形成方法 |
JP2005-257946 | 2005-09-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006082718A1 true WO2006082718A1 (ja) | 2006-08-10 |
Family
ID=36777107
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/300838 WO2006082718A1 (ja) | 2005-02-01 | 2006-01-20 | 誘電体膜及びその形成方法 |
Country Status (7)
Country | Link |
---|---|
US (1) | US20080187747A1 (ja) |
EP (1) | EP1852904A4 (ja) |
JP (1) | JP2006245528A (ja) |
KR (1) | KR20070101268A (ja) |
CN (1) | CN101120437B (ja) |
TW (1) | TWI411009B (ja) |
WO (1) | WO2006082718A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105140123A (zh) * | 2014-05-30 | 2015-12-09 | 中芯国际集成电路制造(上海)有限公司 | 鳍式场效应晶体管的形成方法 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5156978B2 (ja) * | 2007-12-17 | 2013-03-06 | ルネサスエレクトロニクス株式会社 | 半導体装置の製造装置および半導体装置の製造方法 |
CN102067291B (zh) * | 2008-06-24 | 2013-05-08 | 东芝三菱电机产业系统株式会社 | 氮游离基产生器、氮化处理装置、氮游离基的产生方法、以及氮化处理方法 |
US20150118416A1 (en) * | 2013-10-31 | 2015-04-30 | Semes Co., Ltd. | Substrate treating apparatus and method |
KR20220113458A (ko) * | 2019-12-09 | 2022-08-12 | 엔테그리스, 아이엔씨. | 다중 장벽 재료로 제조된 확산 장벽, 그리고 관련 물품 및 방법 |
JP7513547B2 (ja) * | 2021-02-25 | 2024-07-09 | キオクシア株式会社 | 半導体製造装置および半導体装置の製造方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003188172A (ja) * | 2001-12-18 | 2003-07-04 | Tokyo Electron Ltd | 基板処理方法 |
WO2003088345A1 (fr) * | 2002-03-29 | 2003-10-23 | Tokyo Electron Limited | Materiau pour dispositif electronique et procede de fabrication correspondant |
WO2003098678A1 (fr) * | 2002-05-16 | 2003-11-27 | Tokyo Electron Limited | Procede de traitement de substrat |
JP2005150285A (ja) * | 2003-11-13 | 2005-06-09 | Matsushita Electric Ind Co Ltd | 半導体装置の製造方法 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6399445B1 (en) * | 1997-12-18 | 2002-06-04 | Texas Instruments Incorporated | Fabrication technique for controlled incorporation of nitrogen in gate dielectric |
US6087229A (en) * | 1998-03-09 | 2000-07-11 | Lsi Logic Corporation | Composite semiconductor gate dielectrics |
US6342437B1 (en) * | 2000-06-01 | 2002-01-29 | Micron Technology, Inc. | Transistor and method of making the same |
JP2002151684A (ja) * | 2000-11-09 | 2002-05-24 | Nec Corp | 半導体装置及びその製造方法 |
WO2003015151A1 (en) * | 2001-08-02 | 2003-02-20 | Tokyo Electron Limited | Base material treating method and electron device-use material |
US7018879B2 (en) * | 2002-03-20 | 2006-03-28 | Taiwan Semiconductor Manufacturing Co., Ltd. | Method of making an ultrathin silicon dioxide gate with improved dielectric properties using NH3 nitridation and post-deposition rapid thermal annealing |
JP2004087865A (ja) * | 2002-08-28 | 2004-03-18 | Hitachi Ltd | 半導体装置の製造方法 |
-
2005
- 2005-09-06 JP JP2005257946A patent/JP2006245528A/ja active Pending
-
2006
- 2006-01-20 CN CN2006800031840A patent/CN101120437B/zh not_active Expired - Fee Related
- 2006-01-20 KR KR1020077015590A patent/KR20070101268A/ko not_active Application Discontinuation
- 2006-01-20 US US11/883,421 patent/US20080187747A1/en not_active Abandoned
- 2006-01-20 WO PCT/JP2006/300838 patent/WO2006082718A1/ja active Application Filing
- 2006-01-20 EP EP06712063A patent/EP1852904A4/en not_active Withdrawn
- 2006-02-03 TW TW095103702A patent/TWI411009B/zh not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2003188172A (ja) * | 2001-12-18 | 2003-07-04 | Tokyo Electron Ltd | 基板処理方法 |
WO2003088345A1 (fr) * | 2002-03-29 | 2003-10-23 | Tokyo Electron Limited | Materiau pour dispositif electronique et procede de fabrication correspondant |
WO2003098678A1 (fr) * | 2002-05-16 | 2003-11-27 | Tokyo Electron Limited | Procede de traitement de substrat |
JP2005150285A (ja) * | 2003-11-13 | 2005-06-09 | Matsushita Electric Ind Co Ltd | 半導体装置の製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105140123A (zh) * | 2014-05-30 | 2015-12-09 | 中芯国际集成电路制造(上海)有限公司 | 鳍式场效应晶体管的形成方法 |
CN105140123B (zh) * | 2014-05-30 | 2018-03-06 | 中芯国际集成电路制造(上海)有限公司 | 鳍式场效应晶体管的形成方法 |
Also Published As
Publication number | Publication date |
---|---|
JP2006245528A (ja) | 2006-09-14 |
KR20070101268A (ko) | 2007-10-16 |
TWI411009B (zh) | 2013-10-01 |
CN101120437A (zh) | 2008-02-06 |
EP1852904A1 (en) | 2007-11-07 |
EP1852904A4 (en) | 2009-11-18 |
CN101120437B (zh) | 2010-05-19 |
TW200636813A (en) | 2006-10-16 |
US20080187747A1 (en) | 2008-08-07 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR100645306B1 (ko) | 기판 처리 방법 | |
JP5706946B2 (ja) | プラズマエッチング方法及びプラズマエッチング装置 | |
US7820558B2 (en) | Semiconductor device and method of producing the semiconductor device | |
US6596576B2 (en) | Limiting hydrogen ion diffusion using multiple layers of SiO2 and Si3N4 | |
KR101058882B1 (ko) | 초-저압에서 암모니아를 이용한 급속 열 어닐링을 통한 실리콘 옥시질화물의 질소 프로파일 테일러링 | |
JP4795407B2 (ja) | 基板処理方法 | |
US7923360B2 (en) | Method of forming dielectric films | |
US20130072033A1 (en) | Plasma cvd method, method for forming silicon nitride film and method for manufacturing semiconductor device | |
CN101290886B (zh) | 栅极介质层及栅极的制造方法 | |
WO2008147689A1 (en) | Boron nitride and boron nitride-derived materials deposition method | |
WO2006082718A1 (ja) | 誘電体膜及びその形成方法 | |
US8163626B2 (en) | Enhancing NAND flash floating gate performance | |
US20070281107A1 (en) | Plasma processing method | |
US20040005748A1 (en) | Methods of forming a gate insulating layer in an integrated circuit device in which the gate insulating layer is nitrified and then annealed to cure defects caused by the nitridation process | |
EP1796174A1 (en) | Highly dielectric film, and utilizing the same, field-effect transistor and semiconductor integrated circuit apparatus, and process for producing the highly dielectric film | |
KR100255165B1 (ko) | 반도체소자의제조방법 | |
CN112864007A (zh) | 半导体结构的形成方法 | |
JP2009094429A (ja) | 半導体装置の製造方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1020077015590 Country of ref document: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 200680003184.0 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11883421 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2006712063 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 2006712063 Country of ref document: EP |