WO2012033305A2 - 반도체 소자의 제조 방법 - Google Patents
반도체 소자의 제조 방법 Download PDFInfo
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- WO2012033305A2 WO2012033305A2 PCT/KR2011/006485 KR2011006485W WO2012033305A2 WO 2012033305 A2 WO2012033305 A2 WO 2012033305A2 KR 2011006485 W KR2011006485 W KR 2011006485W WO 2012033305 A2 WO2012033305 A2 WO 2012033305A2
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- Prior art keywords
- amorphous silicon
- forming
- multilayer structure
- substrate
- layer
- Prior art date
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- 239000004065 semiconductor Substances 0.000 title claims abstract description 66
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 24
- 229910021417 amorphous silicon Inorganic materials 0.000 claims abstract description 87
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 75
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 75
- 239000010703 silicon Substances 0.000 claims abstract description 75
- 239000000758 substrate Substances 0.000 claims abstract description 64
- 238000005229 chemical vapour deposition Methods 0.000 claims abstract description 19
- 239000012686 silicon precursor Substances 0.000 claims abstract description 12
- 239000002019 doping agent Substances 0.000 claims abstract description 8
- 239000012495 reaction gas Substances 0.000 claims abstract description 7
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 23
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 15
- 238000004518 low pressure chemical vapour deposition Methods 0.000 claims description 11
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 7
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 7
- 238000000151 deposition Methods 0.000 claims description 2
- 238000002347 injection Methods 0.000 claims 1
- 239000007924 injection Substances 0.000 claims 1
- 229910052709 silver Inorganic materials 0.000 claims 1
- 239000004332 silver Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 abstract description 5
- 239000010408 film Substances 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 4
- 229920005591 polysilicon Polymers 0.000 description 4
- 238000003917 TEM image Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 238000004627 transmission electron microscopy Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02494—Structure
- H01L21/02496—Layer structure
- H01L21/02505—Layer structure consisting of more than two layers
- H01L21/02507—Alternating layers, e.g. superlattice
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02439—Materials
- H01L21/02441—Group 14 semiconducting materials
- H01L21/0245—Silicon, silicon germanium, germanium
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02436—Intermediate layers between substrates and deposited layers
- H01L21/02439—Materials
- H01L21/02488—Insulating materials
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02518—Deposited layers
- H01L21/02521—Materials
- H01L21/02524—Group 14 semiconducting materials
- H01L21/02532—Silicon, silicon germanium, germanium
-
- 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
- H01L21/02365—Forming inorganic semiconducting materials on a substrate
- H01L21/02612—Formation types
- H01L21/02617—Deposition types
- H01L21/0262—Reduction or decomposition of gaseous compounds, e.g. CVD
Definitions
- the present invention relates to a method for manufacturing a semiconductor device, and more particularly, to a method for manufacturing a semiconductor device including a multilayer structure.
- the technical problem of the present invention is to solve the above-described problems and to provide a method for manufacturing a highly integrated semiconductor device.
- the present invention provides a method for manufacturing a semiconductor device having a multilayer structure for high integration.
- a method of manufacturing a semiconductor device includes loading a substrate into a chamber of a chemical vapor deposition apparatus and using a dopant having a silicon precursor and a conductive type in the chamber in which the substrate is loaded. Implanting to form a doped amorphous silicon layer on the substrate and injecting a silicon precursor and a reactant gas into the chamber loaded with the substrate to form an insulating layer containing silicon on the substrate. Repeating, to form a multi-layer structure in which a plurality of the doped amorphous silicon layer and a plurality of the insulating layer is alternately stacked.
- the chemical vapor deposition apparatus may be a low pressure chemical vapor deposition apparatus.
- the step may be performed while keeping the temperature of the substrate constant.
- the forming of the doped amorphous silicon layer and the forming of the insulating layer may be performed while maintaining the temperature of the substrate at 50CTC to 650 ° C.
- the forming of the doped amorphous silicon layer and the forming of the insulating layer may be performed while maintaining a constant pressure inside the chamber.
- the forming of the doped amorphous silicon layer and the forming of the insulating layer may be performed while maintaining the pressure inside the chamber at lOTorr to 300 Torr.
- the conductive type of the doped amorphous silicon layer may be p-type.
- the dopant having the conductivity type may be B 2 H 6 or BC1 3 gas.
- the insulating layer including silicon may be a silicon oxide film or a silicon nitride film.
- the forming of the multilayer structure may be performed such that a plurality of the doped amorphous silicon layers stacked on the multilayer structure maintains an amorphous state.
- the silicon precursor may be one or more gases selected from the group of gases including SiH 4 , Si 2 H 6 , Si 3 3 ⁇ 4 and Si 4 H 10 .
- the multilayer structure includes n the doped amorphous silicon layers and n-1 the insulating layers (where n is a positive integer of 2 or more), and the n doped amorphous silicon layers Each of the insulating layers may be disposed between each other.
- the multilayer structure includes m the insulating layers and m-1 the doped amorphous silicon layers, where m is a positive large integer of 2 or more, and each of the m insulating layers One doped amorphous silicon layer may be disposed between each other.
- a multilayer structure that may have a constant thickness may be formed.
- the height of the stack is increased, it is possible to form a multilayer structure in which no pip is generated and the thickness is not reduced.
- a multi-layered structure may be formed to form a semiconductor device including a three-dimensional memory cell, and each memory cell may have an effective characteristic regardless of the stacked height. As a result, more and more integrated semiconductor devices can be provided using the same process equipment. can do.
- FIG. 1 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a first embodiment of the present invention.
- FIG. 2 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a second embodiment of the present invention.
- FIG. 3 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a variation of the first embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a variation of the second embodiment of the present invention.
- FIG. 5 is a schematic cross-sectional view illustrating a semiconductor manufacturing apparatus for manufacturing a semiconductor device having a multilayer structure according to embodiments of the present invention.
- FIG. 6 is a cross-sectional view illustrating a multilayer structure of a semiconductor device according to some embodiments of the present invention.
- FIG. 7 is a cross-sectional view illustrating a multilayer structure of a semiconductor device according to a second exemplary embodiment of the present invention.
- FIG. 8 is a cross-sectional view illustrating a multilayer structure of a semiconductor device in accordance with a modification of the first embodiment of the present invention.
- FIG. 9 is a cross-sectional view illustrating a multilayer structure of a semiconductor device in accordance with a modification of the second embodiment of the present invention.
- FIG. 10 is a transmission electron micrograph comparing the cross section of the multi-layer structure according to the embodiments of the present invention with the cross section of the comparative sample.
- FIG. 11 is an arrangement and cross-sectional view of a semiconductor device including a multilayer structure according to example embodiments.
- FIG. 11 is an arrangement and cross-sectional view of a semiconductor device including a multilayer structure according to example embodiments.
- FIG. 1 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to the first embodiment of the present invention.
- a substrate is loaded into a chamber of a chemical vapor deposition (CVD) apparatus (S100).
- a multi-layer structure is formed on the substrate loaded in the chamber (S200), and a step (S210) of forming an amorphous silicon layer to form a multi-layer structure and a step of forming an insulating layer containing silicon (S220) together.
- S100 chemical vapor deposition
- S210 a step of forming an amorphous silicon layer to form a multi-layer structure and a step of forming an insulating layer containing silicon
- the amorphous silicon layer may be made of doped amorphous silicon having a conductivity type. Silicon based as a source gas to form the amorphous silicon layer
- silicon-based gas may be used as the silicon precursor.
- a dopant having a conductivity may be injected together to form the amorphous silicon layer made of doped amorphous silicon having a conductivity type.
- the insulating layer including silicon may be formed of a silicon oxide film or a silicon nitride film.
- a reaction gas containing oxygen or nitrogen may be used together with a silicon precursor as a source gas.
- the forming of the amorphous silicon layer (S210) and the forming of the insulating layer including siliconol (S220) may be repeatedly performed in consideration of the number of layers of the multilayer structure to be formed (S230). Forming a multi-layer structure (S200) to repeat the step of forming an amorphous silicon layer (S210) and the step of forming an insulating layer containing silicon (S220) is performed so that the amorphous silicon layers to maintain an amorphous state Can be.
- the substrate may be unloaded from inside the chamber of the chemical vapor deposition apparatus. (S900)
- the amorphous silicon layer and the insulating layer including the silicon may be alternately stacked.
- the chemical vapor deposition apparatus may be a low pressure chemical vapor deposition (Low-Pressure CVD, LPCVD) apparatus.
- the multilayer structure may be formed while maintaining a constant pressure inside the chamber in the chamber of the low pressure chemical vapor deposition apparatus.
- the multilayer structure may be formed while maintaining the pressure in the chamber at lOTorr to 300 Torr. That is, the forming of the amorphous silicon layer (S210) and the forming of the insulating layer including the silicon (S220) may be performed while maintaining a constant pressure inside the chamber.
- the multilayer structure may be formed while maintaining a constant temperature of the substrate in the chamber of the low pressure chemical vapor deposition apparatus.
- the multilayer structure may be formed while maintaining the temperature of the substrate at 500 ° C to 650 ° C. That is, the forming of the amorphous silicon layer (S210) and the step of forming the insulating layer containing silicon (S220) may be performed while keeping the temperature of the substrate constant.
- FIG. 2 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a second embodiment of the present invention.
- a substrate is loaded into a chamber of a chemical vapor deposition apparatus.
- a multilayer structure is formed on the substrate loaded in the chamber (S202), forming an insulating layer including silicon (S212), and forming an amorphous silicon layer (S222) to form the multilayer structure.
- S202 A substrate loaded in the chamber
- S212 an insulating layer including silicon
- S222 amorphous silicon layer
- the forming of the insulating layer including silicon (S212) and the forming of the amorphous silicon layer (S222) to form the multilayer structure may be repeatedly performed in consideration of the number of layers of the multilayer structure to be formed. There is (S232). After forming the multilayer structure, the substrate may be loaded from inside the chamber of the chemical vapor deposition apparatus.
- the multilayer structure may alternately stack an insulating layer including silicon and the amorphous silicon layer.
- the semiconductor device according to the second embodiment of the present invention shown in FIG. 2 includes a multilayer structure in which an insulating layer containing silicon and an amorphous silicon layer are alternately stacked.
- the semiconductor device according to the embodiment 1 of the present invention shown in FIG. 1 includes a multilayer structure in which an amorphous silicon layer and an insulating layer including silicon are alternately stacked.
- the chemical vapor deposition apparatus may be a low pressure chemical vapor deposition apparatus. Forming the insulating layer including the silicon (S212) and forming the amorphous silicon layer (S222) may be performed while maintaining a constant pressure inside the chamber. In addition, the forming of the insulating layer including the silicon (S212) and the forming of the amorphous silicon layer (S222) may be performed while maintaining a constant temperature of the substrate. ⁇ 53>
- FIG. 3 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a variation of the first embodiment of the present invention.
- a substrate is loaded into a chamber of a chemical vapor deposition apparatus.
- a multilayer structure is formed on the substrate loaded in the chamber (S204), forming an amorphous silicon layer (S214) and forming an insulating layer containing silicon (S224) to form a multilayer structure. After being repeatedly performed (S234), an additional step of forming an amorphous silicon layer (S244) may be further performed. After forming the multilayer structure, the substrate may be loaded from inside the chamber of the chemical vapor deposition apparatus. (S904)
- the multilayer structure may have a stacked structure such that an insulating layer including the silicon is disposed between the amorphous silicon layers.
- the chemical vapor deposition apparatus may be a low pressure chemical vapor deposition apparatus.
- the forming of the amorphous silicon layer (S214), the forming of the insulating layer including the silicon (S224), and the forming of the additional amorphous silicon layer (S244) may uniformly maintain the pressure inside the chamber. Can be performed.
- the forming of the amorphous silicon layer (S214), the forming of the insulating layer including silicon (S224) and the step of forming the additional amorphous silicon layer (S244) may be performed at a temperature of the substrate. It can be performed while keeping constant.
- FIG. 4 is a flowchart illustrating a method of manufacturing a semiconductor device including a multilayer structure according to a variation of the second embodiment of the present invention.
- a substrate is loaded into a chamber of a chemical vapor deposition apparatus.
- a multilayer structure is formed on the substrate loaded in the chamber (S206), forming an insulating layer including silicon to form a multilayer structure (S216), and forming an amorphous silicon layer (S226) are repeated. After performing (S236), additionally forming an insulating layer including silicon (S246) may be further performed. After forming the multilayer structure, the substrate may be loaded from within the tube of the chemical vapor deposition apparatus. (S906)
- the multilayer structure may have a stacked structure such that the amorphous silicon layer is disposed between the insulating layers including the silicon.
- the chemical vapor deposition apparatus may be a low pressure chemical vapor deposition apparatus. Forming an insulating layer including the silicon (S216), forming the amorphous silicon layer (S226) and forming an additional insulating layer containing silicon (S246) is the pressure inside the chamber It can be performed while keeping constant.
- the step of forming the insulating layer containing silicon (S216), the step of forming the amorphous silicon layer (S226) and the step of forming an insulating layer containing the additional silicon (S246) is the temperature of the substrate It can be performed while keeping a constant.
- FIG. 5 is a schematic cross-sectional view illustrating a semiconductor manufacturing apparatus for manufacturing a semiconductor device including a multilayer structure according to example embodiments.
- FIG. 5 is a schematic cross-sectional view illustrating a semiconductor manufacturing apparatus for manufacturing a semiconductor device including a multilayer structure according to example embodiments.
- an introduction part 12 for introducing a reaction gas into the chamber 11 of the semiconductor manufacturing apparatus 10 is formed.
- the reaction gas introduced by the introduction part 12 may be injected into the chamber 11 through the shower head 13.
- the substrate 100 to be deposited is placed on the chuck 14, which is such a chuck.
- the chuck 14 is to be supported by the chuck support (16).
- the chuck 14 may be heated to the substrate 100 if necessary, such that the substrate 100 has a predetermined temperature. After the deposition is performed by this apparatus, it is discharged by the discharge section 17.
- the multilayer structure described above in FIGS. 1 to 4 may be formed. That is, the steps of forming the amorphous silicon layer in the state in which the substrate 100 is loaded in the chamber 11 by the semiconductor manufacturing apparatus 10 (S210, S222, S214, S244, S226) and insulation including silicon Forming the layer (S220, S212, S224, S216, S246) may be performed together.
- the pressure in the chamber 11 may be kept constant.
- heat may be applied by the chuck 14 so that the temperature of the substrate 100 is kept constant.
- FIG. 6 is a cross-sectional view illustrating a multilayer structure of the semiconductor device according to the first embodiment of the present invention.
- FIG. 6 is a multilayer structure formed by a method of manufacturing a semiconductor device including a multilayer structure according to the first embodiment of the present invention shown in FIG. 1.
- a multilayer structure 200 may be formed on the substrate 100.
- the multilayer structure 200 may be a structure in which an amorphous silicon layer 220 and an insulating layer 240 including siliconol are alternately stacked. That is, the multilayer structure 200 may be a structure in which the same number of amorphous silicon layers 220 and the insulating layers 240 including silicon are alternately stacked.
- Substrate 100 may include a semiconductor substrate, such as, for example, a silicon or compound semiconductor wafer. Alternatively, the substrate 100 may include semiconductors such as glass, metal, ceramics, quartz, and other substrate materials.
- a silicon precursor which is a silicon-based gas
- the silicon-based gas may include SiH 4, Si 2 H 6, Si 3 H 8, or SiAo.
- the amorphous silicon layer 220 may be made of doped amorphous silicon having a conductivity type. In order to form the doped amorphous silicon having the conductivity type, dopants having the conductivity type may be injected together.
- the conductivity type may be p-type.
- the dopant having the conductivity type may be 3 ⁇ 43 ⁇ 4 or BC1 3 gas.
- the insulating layer 240 including silicon may be formed of, for example, a silicon oxide film or a silicon nitride film.
- a silicon precursor and a reaction gas containing oxygen or nitrogen may be used together.
- the reaction gas may be, for example, N 2 O gas.
- FIG. 7 is a cross-sectional view illustrating a multilayer structure of a semiconductor device in accordance with a second embodiment of the present invention. Specifically, FIG. 7 is a multilayer structure formed by a method of manufacturing a semiconductor device including a multilayer structure according to the second embodiment of the present invention shown in FIG. 2.
- a multilayer structure 202 may be formed on the substrate 100.
- the multilayer structure 202 may be a structure in which an insulating layer 240 including silicon and an amorphous silicon layer 220 are alternately stacked. That is, the multilayer structure 202 may be a structure in which the insulating layer 240 and the amorphous silicon layer 220 including the same number of silicon are alternately stacked.
- FIG. 8 is a cross-sectional view illustrating a multilayer structure of a semiconductor device in accordance with a modification of the first embodiment of the present invention. Specifically, FIG. 8 is a multilayer structure formed through the method of manufacturing a semiconductor device including the multilayer structure according to the modification of the embodiment of the present invention shown in FIG. 3.
- a multilayer structure 204 may be formed on the substrate 100.
- the multilayer structure 204 may be a stacked structure such that an insulating layer 240 including silicon is disposed between each of the plurality of amorphous silicon layers 220.
- the multilayer structure 204 includes n amorphous silicon layers 220 and n_l silicon.
- the insulating layers 240 may be included, and each of the n amorphous silicon layers 220 may be stacked so that the insulating layer 240 including one silicon is disposed (where n is Positive integer of 2 or greater).
- FIG. 9 is a cross-sectional view illustrating a multilayer structure of a semiconductor device in accordance with a modification of the second embodiment of the present invention. Specifically, FIG. 9 is a multilayer structure formed by a method of manufacturing a semiconductor device including a multilayer structure according to a variation of the second embodiment of the present invention shown in FIG. 4.
- a multilayer structure 206 may be formed on the substrate 100.
- the multilayer structure 206 may be a structure in which an amorphous silicon layer 220 is disposed between each of the insulating layers 240 including a plurality of silicon.
- the multilayer structure 206 includes the insulating layers 240 including m silicon and the m-1 amorphous silicon layers 220, and the insulating layers 240 including m silicon.
- Each amorphous silicon layer 220 may be arranged so as to be disposed between each other, provided that m is a positive integer of 2 or more.
- a multilayer structure 200, 202 according to embodiments of the present invention.
- the present invention is not limited thereto.
- multilayer structure 200, 202, 204, 206 In the multilayer structure 200, 202, 204, 206 according to the embodiments of the present disclosure, two kinds of thin films are alternately stacked, but three or more kinds of thin films are within the scope of the technical idea of the present invention. It is also possible to stack.
- amorphous silicon layer for example, it is also possible to alternately stack three layers of an amorphous silicon layer, a silicon oxide layer, and a silicon nitride layer, or to alternately arrange a silicon oxide layer and a silicon nitride layer between the amorphous silicon layers.
- n-type amorphous silicon layer three layers of an n-type amorphous silicon layer, a p-type amorphous silicon layer and a silicon insulating layer are alternately arranged, or an n-type amorphous silicon layer, a p-type amorphous silicon layer, a silicon oxide layer, and silicon It is also possible to laminate the four layers of the nitride layer alternately or as necessary.
- Example 10 is a transmission electron micrograph comparing the cross section (sample 1) of the multilayer structure according to the embodiments of the present invention with the cross section (sample 2) of the comparative sample.
- sample 1 a multilayer structure (sample 1) and a comparison according to embodiments of the present invention.
- Cross sections of the sample (Sample 2) can be compared by transmission electron microscopy (TEM).
- TEM transmission electron microscopy
- the multilayer structure (Sample 1) has a multilayer structure in which an amorphous silicon layer (S1) and a silicon oxide layer (II) doped with p-type are alternately stacked.
- the comparative sample (Sample 2) has a multilayer structure in which the polysilicon layer (S2) and the silicon oxide layer 12 are alternately laminated.
- the multilayer structure (Sample 1) may be formed such that the amorphous silicon layer (S1) and the silicon oxide layer (II) have a constant thickness.
- the silicon oxide layer (II) may be formed to have a constant thickness regardless of the stacked height.
- forming to have a constant thickness is not limited to the meaning that the amorphous silicon layers S1 or the silicon oxide layers II each have the same thickness. That is, the amorphous silicon layers S1 or the silicon oxide layers II are formed to have a constant thickness. Under the same process time, it means that they are formed to have almost the same thickness.
- the amorphous silicon layer (S1) or the silicon oxide layer (II) is directly proportional to the process time.
- the thickness of the amorphous silicon layer (S1) or the silicon oxide layer (II) may increase with increasing process time. Therefore, in consideration of this point, the thicknesses of the individual layers of the multilayer structure formed by the amorphous silicon layer S1 and the silicon oxide layer II may be formed differently as necessary.
- the comparative sample does not have a constant thickness between the polysilicon layer (S2) and the silicon oxide layer (12).
- the silicon oxide layer 12 may become thinner as the stacked height decreases.
- the stacked layers increase, warpage may occur in the substrate 10 due to the stress caused by the film, and thus the area in which the substrate 10 contacts the chuck 14 may decrease. Can be. Therefore, since the heat applied to the substrate 10 is not applied, the thickness of the individual layer formed on the substrate 10 is reduced. In particular, if the warpage is further increased in the substrate 10, the individual layers formed on the substrate 10 may be difficult to form the desired thickness even with increasing processing time. That is, according to the stress accumulated in the film, the comparative sample (Sample 2), the thickness of each layer having a multi-layer structure becomes thin, and also the warp phenomenon may occur on the substrate (1) and the multi-layer structure. have.
- the silicon layer S1 included in the multilayer structure is amorphous, stress due to crystallization of the silicon layer S1 does not occur. Therefore, even if the layer to be laminated increases, the phenomenon that the silicon oxide layer (II) is thinned does not occur, and warpage may not occur in the substrate 1 and the multilayer structure.
- the multilayer structure (Sample 1) according to the embodiments of the present invention may be formed so that the amorphous silicon layer S1 constituting the multilayer structure maintains an amorphous state.
- the multilayer structure (sample 1) according to embodiments of the present invention may be formed while maintaining the temperature of the substrate 100 at a relatively low temperature of 50CTC to 650 ° C as described above.
- the multilayer structure (sample 1) according to the embodiments of the present invention may be formed while maintaining the temperature of the substrate 100 at a temperature of 570 ° C or less.
- the multilayer structure (Sample 1) according to the embodiments of the present invention may be formed while maintaining a constant pressure inside the chamber 11 in the low pressure chemical vapor deposition apparatus as described above.
- the degradation of the surface roughness characteristic of the silicon layer and the I-V characteristic of the insulating layer containing silicon, which may occur in the case of using the plasma chemical vapor deposition apparatus, can be prevented.
- FIG. 11 is an arrangement and cross-sectional view of a semiconductor device including a multilayer structure according to example embodiments.
- FIG. 11 is an arrangement and cross-sectional view of a semiconductor device including a multilayer structure according to example embodiments.
- a silicon layer 1220 and a silicon insulating layer 1240 are alternately stacked to form a plurality of NAND flash cells. It may be a nonvolatile memory device forming an upper / lower selecting transistor (UST / LST).
- the silicon layer 1220 and the silicon insulating layer 1240 may be the insulating layer 240 including the amorphous silicon layer 220 and the silicon layer shown in FIGS. 6 to 9, or may be water as a result of heat treatment. .
- the silicon layer 1220 may be, for example, a doped silicon layer having a conductivity type.
- Silicon layer 1220 may be a doped amorphous silicon layer or a doped polysilicon layer.
- the silicon layer 1220 is a doped polysilicon layer, the silicon layer 1220 has a multilayer structure. It is formed in an amorphous state until the two formed, and then can be changed into a polycrystalline state integrally through a separate heat treatment.
- Silicon layer 1220 may be, for example, a p-type doped silicon layer.
- the silicon layer 1220 may be formed to have a p-type conductivity type in order to improve program / erase characteristics.
- the silicon layer 1220 has a p-type conductivity, since the work function is relatively higher than that of the n-type conductivity type, the program / erase characteristics can be improved.
- a multilayer structure in which the silicon filling 1220 and the silicon insulating layer 1240 are alternately stacked on the substrate 1100 is formed.
- a charge storage layer 1300 is formed on the surface of the through hole, and a semiconductor pillar (to fill the through hole) 1400.
- the charge storage layer 1300 may include a tunneling oxide layer, a charge trap layer, and a blocking insulation layer.
- the wiring layer 1500 is formed to be electrically connected to the semiconductor lamp 1400.
- the wiring layer 1500 may be a bit line wiring of the semiconductor device 1000.
- the top and bottom layers of the silicon layer 1220 may be gate electrodes of an upper / lower selecting transistor (UST / LST).
- the middle layers of the silicon layer 1220 except for the topmost and bottommost layers may be gate electrodes of the NAND flash cell.
- the semiconductor device 1000 in order for the semiconductor device 1000 to include more NAND flash cells, further increasing the number of times the silicon layer 1220 and the silicon insulating layer 1240 are alternately stacked on the substrate 1100 may be used. More NAND flash cells can be stacked in the vertical direction with respect to the stack.
- the thickness of the silicon layer 1220 and the silicon insulation layer 1240 is vertically fixed from the substrate 1100 in a vertical direction. In particular, it should be formed to have a desired thickness.
- the semiconductor device 1000 may include more NAND flash cells and may have effective characteristics. have. As a result, the semiconductor device 1000 including the 3D NAND flash cell may be formed. ⁇ 120>
- the present invention can be used for various types of semiconductor manufacturing processes such as deposition processes.
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- Manufacturing & Machinery (AREA)
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Abstract
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Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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US13/813,978 US20130130480A1 (en) | 2010-09-06 | 2011-09-01 | Method for manufacturing a semiconductor device |
JP2013525848A JP5642282B2 (ja) | 2010-09-06 | 2011-09-01 | 半導体素子の製造方法 |
CN201180042742.5A CN103081063B (zh) | 2010-09-06 | 2011-09-01 | 半导体元件的制造方法 |
Applications Claiming Priority (2)
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KR10-2010-0086964 | 2010-09-06 | ||
KR1020100086964A KR101176900B1 (ko) | 2010-09-06 | 2010-09-06 | 반도체 소자의 제조 방법 |
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WO2012033305A2 true WO2012033305A2 (ko) | 2012-03-15 |
WO2012033305A3 WO2012033305A3 (ko) | 2012-06-28 |
WO2012033305A8 WO2012033305A8 (ko) | 2013-01-10 |
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PCT/KR2011/006485 WO2012033305A2 (ko) | 2010-09-06 | 2011-09-01 | 반도체 소자의 제조 방법 |
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US (1) | US20130130480A1 (ko) |
JP (1) | JP5642282B2 (ko) |
KR (1) | KR101176900B1 (ko) |
CN (1) | CN103081063B (ko) |
WO (1) | WO2012033305A2 (ko) |
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KR20140049313A (ko) * | 2012-10-17 | 2014-04-25 | 에스케이하이닉스 주식회사 | 반도체 소자의 정렬 키 및 이의 형성 방법 |
KR101551199B1 (ko) * | 2013-12-27 | 2015-09-10 | 주식회사 유진테크 | 사이클릭 박막 증착 방법 및 반도체 제조 방법, 그리고 반도체 소자 |
CN106876401B (zh) * | 2017-03-07 | 2018-10-30 | 长江存储科技有限责任公司 | 存储器件的形成方法 |
US10490467B2 (en) | 2017-07-06 | 2019-11-26 | Applied Materials, Inc. | Methods of forming a stack of multiple deposited semiconductor layers |
KR102542624B1 (ko) | 2018-07-17 | 2023-06-15 | 삼성전자주식회사 | 반도체 소자 및 이의 제조 방법 |
US20200135489A1 (en) * | 2018-10-31 | 2020-04-30 | Atomera Incorporated | Method for making a semiconductor device including a superlattice having nitrogen diffused therein |
CN111403414B (zh) * | 2020-03-30 | 2023-06-27 | 长江存储科技有限责任公司 | 三维存储器及其形成方法 |
WO2023153203A1 (ja) * | 2022-02-08 | 2023-08-17 | 東京エレクトロン株式会社 | 基板処理方法および基板処理装置 |
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JPH1117109A (ja) * | 1997-06-23 | 1999-01-22 | Mitsubishi Electric Corp | 半導体装置の製造方法 |
KR20080062731A (ko) * | 2006-12-29 | 2008-07-03 | 주식회사 하이닉스반도체 | 반도체 소자의 듀얼 폴리게이트 및 그 형성방법 |
KR20100067055A (ko) * | 2008-12-10 | 2010-06-18 | 가부시끼가이샤 도시바 | 비휘발성 반도체 메모리 장치 및 그 제조 방법 |
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TW297950B (ko) * | 1994-12-16 | 1997-02-11 | Handotai Energy Kenkyusho Kk | |
US6635556B1 (en) * | 2001-05-17 | 2003-10-21 | Matrix Semiconductor, Inc. | Method of preventing autodoping |
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KR20090079694A (ko) * | 2008-01-18 | 2009-07-22 | 삼성전자주식회사 | 비휘발성 메모리 소자 및 그 제조 방법 |
JP5330027B2 (ja) * | 2009-02-25 | 2013-10-30 | 株式会社東芝 | 不揮発性半導体記憶装置、及びその製造方法 |
US8362482B2 (en) * | 2009-04-14 | 2013-01-29 | Monolithic 3D Inc. | Semiconductor device and structure |
-
2010
- 2010-09-06 KR KR1020100086964A patent/KR101176900B1/ko active IP Right Grant
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2011
- 2011-09-01 CN CN201180042742.5A patent/CN103081063B/zh not_active Expired - Fee Related
- 2011-09-01 JP JP2013525848A patent/JP5642282B2/ja not_active Expired - Fee Related
- 2011-09-01 US US13/813,978 patent/US20130130480A1/en not_active Abandoned
- 2011-09-01 WO PCT/KR2011/006485 patent/WO2012033305A2/ko active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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JPH1117109A (ja) * | 1997-06-23 | 1999-01-22 | Mitsubishi Electric Corp | 半導体装置の製造方法 |
KR20080062731A (ko) * | 2006-12-29 | 2008-07-03 | 주식회사 하이닉스반도체 | 반도체 소자의 듀얼 폴리게이트 및 그 형성방법 |
KR20100067055A (ko) * | 2008-12-10 | 2010-06-18 | 가부시끼가이샤 도시바 | 비휘발성 반도체 메모리 장치 및 그 제조 방법 |
Also Published As
Publication number | Publication date |
---|---|
KR101176900B1 (ko) | 2012-08-30 |
CN103081063B (zh) | 2016-08-03 |
JP2013541831A (ja) | 2013-11-14 |
CN103081063A (zh) | 2013-05-01 |
KR20120024200A (ko) | 2012-03-14 |
WO2012033305A3 (ko) | 2012-06-28 |
JP5642282B2 (ja) | 2014-12-17 |
WO2012033305A8 (ko) | 2013-01-10 |
US20130130480A1 (en) | 2013-05-23 |
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