WO2022124604A1 - 실리콘 함유막의 에칭 방법 및 이를 포함한 반도체 디바이스의 제조방법 - Google Patents
실리콘 함유막의 에칭 방법 및 이를 포함한 반도체 디바이스의 제조방법 Download PDFInfo
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- etching
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- containing film
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- 238000005530 etching Methods 0.000 title claims abstract description 135
- 238000000034 method Methods 0.000 title claims abstract description 78
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 55
- 239000010703 silicon Substances 0.000 title claims abstract description 55
- 239000004065 semiconductor Substances 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 230000008569 process Effects 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 21
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 40
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 40
- 239000007789 gas Substances 0.000 claims description 39
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 35
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 35
- 230000008021 deposition Effects 0.000 claims description 6
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 2
- UDOZVPVDQKQJAP-UHFFFAOYSA-N trifluoroamine oxide Chemical compound [O-][N+](F)(F)F UDOZVPVDQKQJAP-UHFFFAOYSA-N 0.000 abstract description 3
- 239000010408 film Substances 0.000 description 102
- 230000001965 increasing effect Effects 0.000 description 22
- 238000001020 plasma etching Methods 0.000 description 7
- 238000000151 deposition Methods 0.000 description 6
- 150000002500 ions Chemical class 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- -1 perfluoro compound Chemical class 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000010792 warming Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229910004205 SiNX Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 230000004913 activation Effects 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000001312 dry etching Methods 0.000 description 2
- 238000000623 plasma-assisted chemical vapour deposition Methods 0.000 description 2
- 230000009257 reactivity Effects 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000010884 ion-beam technique Methods 0.000 description 1
- 230000005596 ionic collisions Effects 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 229910021332 silicide Inorganic materials 0.000 description 1
- FVBUAEGBCNSCDD-UHFFFAOYSA-N silicide(4-) Chemical compound [Si-4] FVBUAEGBCNSCDD-UHFFFAOYSA-N 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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Classifications
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- 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
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31105—Etching inorganic layers
- H01L21/31111—Etching inorganic layers by chemical means
- H01L21/31116—Etching inorganic layers by chemical means by dry-etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32091—Radio frequency generated discharge the radio frequency energy being capacitively coupled to the 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
- H01L21/02104—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
- H01L21/02164—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 oxide, e.g. SiO2
-
- 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
Definitions
- the present invention relates to a method for etching a silicon-containing film and a method for manufacturing a semiconductor device including the same, and more particularly, to an etching method for etching a silicon-containing film by direct plasma using an etching gas containing F 3 NO, and the etching method It relates to a method of manufacturing a semiconductor device, including
- a series of processes such as deposition, etching, and cleaning are performed. These processes are performed in a deposition apparatus (eg, a CVD apparatus), an etching apparatus, or a cleaning apparatus having a process chamber.
- the double etching process is a process of forming an ultra-fine structure of a desired shape by selectively removing a portion of a thin film formed on a substrate by a deposition process or the like.
- a vapor phase etching gas reacts with a thin film to be etched, for example, a silicon-containing film to form a highly volatile reaction dispersion, thereby removing a portion of the thin film.
- a plasma etching method using plasma is mainly used. Plasma increases the reactivity by making the etching gas into highly reactive active species or radicals.
- direct plasma technology such as capacitive coupled plasma (CCP) or inductive coupled plasma (ICP) is employed.
- CCP capacitive coupled plasma
- ICP inductive coupled plasma
- the direct plasma technique or direct plasma refers to a technique for directly generating plasma in a process chamber, which is a substrate processing space, or the generated plasma.
- CCP is largely divided into plasma etching (Plasma Etching, PE) or PECVD (Plasma Enhanced Chemical Vapor Deposition) method and reactive ion etching (RIE) or reactive ion deposition (Reactive Ion Chemical Vapor Deposition), and ICP is It is divided into Remote Plasma (RP) and Direct ICP (Helical, TCP, ECR, Helicone Plasma Source, etc.) and includes both of them in direct plasma.
- PE plasma etching
- PECVD Pullasma Enhanced Chemical Vapor Deposition
- RIE reactive ion etching
- Reactive Ion Chemical Vapor Deposition reactive Ion Chemical Vapor Deposition
- ICP is It is divided into Remote Plasma (RP) and Direct ICP (Helical, TCP, ECR, Helicone Plasma Source, etc.) and includes both of them in direct plasma.
- the film quality to be etched should have a high etch rate, whereas the film quality not to be etched should have a low etch rate. There were limits.
- the etching gas used in the etching process is required to have as little influence on the global environment as possible without emitting harmful gases after the etching process.
- perfluoro compound gases such as CF 4 , C 2 F 6 , SF 6 , and NF 3 have been used in large quantities as the etching gas.
- the conventional perfluoro compound etching gas it is difficult to treat the waste gas discharged after the etching process, and accordingly, it is expensive to lower it to an acceptable level before discharge to the atmosphere.
- the conventional perfluoro compound etching gas is a stable compound with a long lifespan in the atmosphere, and since it has a very high global warming potential, it is pointed out as a major factor in global warming.
- Patent Document 1 Registered Patent Publication No. 10-2010466
- the present invention is to solve the problems of the prior art, and a method capable of etching a silicon-containing film with a high selectivity by activating an etching gas containing F 3 NO, which is environmentally friendly, with a relatively low global warming potential, by direct plasma, and
- An object of the present invention is to provide a method for manufacturing a semiconductor device including the same.
- a method for etching a silicon-containing film comprising: introducing a substrate including a first silicon-containing film and a second silicon - containing film into a process chamber of an etching apparatus; supplying at least one etching gas; generating a direct plasma in the process chamber by applying a predetermined power to the process chamber maintained at a predetermined pressure; and activation of the etching gas activated by the direct plasma etching the first silicon-containing film on the substrate by radical, wherein the predetermined pressure is such that a slope of the etch rate of the first silicon-containing film with respect to the pressure is an etch rate of the second silicon-containing film. It is characterized in that the slope and the sign of the pressure are set within a different predetermined range.
- the first silicon-containing film is a silicon nitride film
- the second silicon-containing film is a silicon oxide film, characterized in that.
- the predetermined pressure is greater than the intermediate value within the range in which the slope of the etch rate of the silicon nitride film with respect to the pressure is positive and the slope of the etch rate of the silicon oxide film with respect to the pressure of the pressure is negative. It is characterized in that it is set to a value.
- the predetermined pressure is characterized in that it is within the range of 1 mTorr ⁇ 10 Torr, more preferably, it is characterized in that 200 mTorr ⁇ 270 mTorr.
- the predetermined power is characterized in that it is in the range of 10W or more and 50,000W or less, and more preferably, it is characterized in that it is 240W or more and 320W or less.
- a semiconductor device manufacturing method includes a deposition step of forming a silicon-containing film including a first silicon-containing film and a second silicon-containing film on a substrate, and using the etching method according to an aspect of the present invention. and an etching step of etching the silicon-containing film.
- a silicon-containing film such as a silicon nitride film can be etched with a high selectivity by controlling the pressure and applied power during direct plasma generation while using an environmentally friendly etching gas containing F 3 NO.
- FIGS. 1A and 1B are schematic diagrams of an etching apparatus for performing an etching method according to an embodiment of the present invention.
- FIG. 2 is a flowchart of an etching method according to an embodiment of the present invention.
- FIG 3 is a graph illustrating an etch rate according to a pressure and applied power of a silicon oxide layer.
- FIG. 4 is a graph illustrating an etch rate according to a pressure and applied power of a silicon nitride layer.
- FIG 5 is a graph showing the etching selectivity of the silicon nitride film to the silicon oxide film according to the pressure and applied power.
- FIG. 1a and 1b show an etching apparatus 1 for carrying out an etching method according to an embodiment of the present invention.
- the etching apparatus 1 is a capacitively coupled plasma apparatus capable of generating a direct plasma, and plasma P is directly generated in the process chamber 10 of the etching apparatus 1 through plasma discharge. .
- the etching apparatus 1 includes a shower head 20 serving as an electrode and an RF power source connected to the shower head 20, and the RF power source includes an RF generator 30 and an impedance matching network 40 (Impedance Matching) Network: I.M.N.).
- the RF power source includes an RF generator 30 and an impedance matching network 40 (Impedance Matching) Network: I.M.N.).
- the shower head 20 of the etching apparatus 1 is disposed above the inside of the process chamber 10 , and is used to supply an etching gas or a control gas into the process chamber 10 .
- the RF generator 30 generates RF power, and the impedance matching network 40 adjusts the impedance to stabilize the plasma.
- the etching apparatus 1 includes a stage 50 holding a substrate S as a processing object at a lower portion in the process chamber 10 .
- the stage 50 of the etching apparatus 1 is grounded and functions as a ground electrode.
- a heating wire 510 or a heater electrode may be disposed inside the stage 410 to control the temperature of the substrate S.
- the stage 50 may include fixing means (eg, an electrostatic chuck, etc.) capable of fixing the substrate S during the etching process.
- radical (R) ions When the plasma P is generated, components such as radical (R) ions, electrons, and ultraviolet rays may also be generated from the etching gas. At least one of these radicals (R) and components such as ions, electrons, and ultraviolet rays may be used for etching. Basically, the radical (R) is electrically neutral and the ion is electrically polar. Accordingly, when the plasma P is used for the etching process, the radicals R are used to isotropically etch the etching target, and the ions are used to anisotropically etch the etching target.
- the etching apparatus 1 of FIG. 1A has a structure in which RF power is connected to the shower head 20, but the etching apparatus 1 is not limited thereto.
- an RF power supply may be additionally connected to the stage 50 as shown in FIG. 1B .
- the etching apparatus 1 of this embodiment may have a form in which an ICP apparatus is combined.
- a coil antenna may be disposed in the etching apparatus 1 , and an RF power source may be connected to the coil antenna.
- the etching apparatus 1 of the present embodiment may have a form in which a remote plasma apparatus is combined.
- FIG. 2 is a flowchart of an etching method using direct plasma according to the present embodiment.
- the substrate S on which the silicon-containing film is formed is loaded into the process chamber 10 of the etching apparatus 1 through a gate valve (not shown).
- the substrate S is placed on the stage 50 in the etching apparatus 1 (S01).
- the silicon-containing film formed on the substrate S includes at least a silicon nitride film (SiNx, a first silicon-containing film) and a silicon oxide film (SiO 2 , a second silicon-containing film).
- the etching method of the present invention is not limited thereto, and other silicon-containing films (eg, polysilicon, silicide, etc.) may be included.
- an etching gas including F 3 NO is supplied into the process chamber 10 through the shower head 20 (S02).
- a control gas eg, H 2 O, H 2 , HBr, etc.
- the concentration of active species generated in the direct plasma of F 3 NO can be adjusted, thereby controlling the etching selectivity of the silicon-containing film to be etched.
- an inert gas such as Ar may be additionally supplied.
- direct plasma is generated in the process chamber 10 ( S03 ).
- the silicon oxide film It is possible to maximize the etching selectivity of the silicon nitride film to In the embodiment of the present invention, since F 3 NO is used as the etching gas, active species such as F, F 2 , FNO, and NO are generated in the direct plasma generated in the process chamber 10 .
- the silicon nitride film can be etched with a high selectivity to the silicon oxide film.
- the substrate S on which the etching process is completed is unloaded from the process chamber 10 and transferred to the next process.
- FIG. 3 shows a silicon oxide film according to pressure and applied power when direct plasma is generated while flowing F 3 NO having a purity of 99.99% into the etching apparatus 1 at a flow rate of 120 sccm in the direct plasma generation step S03 (S03) SiO 2 ) is a graph showing the etch rate
- FIG. 4 is an oxide film of a silicon nitride film (SiNx) with respect to pressure and applied power when a direct plasma is generated under the same conditions as in the case of FIG. 3 in the plasma generating step (S03). It is a graph showing the etch rate of .
- the etch rate decreases in inverse proportion to the pressure in the process chamber 10 . That is, in FIG. 3 , the slope (tangential slope) of the etch rate graph with respect to pressure is negative. Accordingly, the higher the pressure, the lower the etching rate of the silicon oxide film by the direct plasma of the etching gas containing F3NO.
- the applied power during direct plasma generation is 240W
- the pressure during direct plasma generation is increased to 200 mTorr or less, compared to the case where the pressure condition is 130 mTorr, the etch rate of the silicon oxide film is reduced by about 18%. If the pressure during direct plasma generation is further increased to 270 mTorr, the etch rate of the silicon oxide film is lowered, but the absolute value of the slope becomes smaller.
- the applied power of the etching gas containing F 3 NO is increased to 320 W, the overall concentration of active species is increased, so the overall etch rate is increased compared to the case where the power is 240 W, but when the direct plasma is generated As the pressure of , the etch rate of the silicon oxide film decreases, and therefore, the slope of the graph of the etch rate with respect to the pressure is negative as in the case of 240W.
- the etch rate of the silicon nitride film is different from the etch rate of the silicon oxide film, when the direct plasma is generated.
- the overall increase in proportion to the pressure of That is, in FIG. 4 , the slope (tangential slope) of the etch rate graph with respect to the pressure is positive, unlike the graph of FIG. 3 . Therefore, the higher the pressure in the direct plasma generation, the higher the etch rate of the silicon nitride film by the direct plasma of the etching gas containing F3NO.
- the etch rate of the silicon nitride film increases by about 14% compared to the case where the pressure condition is 130 mTorr.
- the pressure condition is further increased to 270 mTorr, the etch rate of the silicon nitride film is further increased by about 15% compared to the case of 200 mTorr.
- the etch rate of the silicon nitride film itself does not change significantly compared to the case where the applied power is 240W.
- the etch rate of the silicon nitride film generally increases as the pressure during direct plasma generation increases, and thus, the slope of the graph of the etch rate with respect to the pressure is generally positive.
- the pressure is increased from 130 mTorr to 200 mTorr, the etch rate of the silicon nitride film hardly changes, and when the pressure is further increased to 270 mTorr, the etch rate sharply increases by nearly 30%.
- the etch rate of the silicon oxide film should be as low as possible and the etch rate of the silicon nitride film should be as high as possible.
- the etching selectivity of the silicon nitride film to the silicon oxide film can be greatly improved by adjusting the pressure and the applied power during direct plasma generation of the etching gas containing F 3 NO.
- the etching selectivity of the silicon nitride film to the silicon oxide film can be increased as the pressure during direct plasma generation of the etching gas containing F 3 NO is increased. This is because, as described above, in the pressure range of 130 mTorr to 270 mTorr, the slope of the graph of the etch rate with respect to the pressure of the silicon oxide film is negative, whereas the slope of the graph of the etch rate with respect to the pressure of the silicon nitride film is positive.
- the intermediate value of the pressure range (in Figs. 3 and 5, By setting the pressure condition to a value greater than 200 mTorr), it is possible to increase the possible etching selectivity.
- the present invention is not limited thereto, and even if the sign of the slope of the graph of the etch rate with respect to pressure is the same, if the absolute values of the slope of the etch rate according to the pressure of the silicon nitride layer and the silicon nitride layer are different from each other, the pressure condition is adjusted This makes it possible to increase the etching selectivity of the silicon nitride film to the silicon oxide film.
- the etch rate of the silicon oxide film increases as the pressure increases
- increase the pressure in the pressure range as much as possible to obtain the etching selectivity can be made larger
- the etch rate of the silicon oxide film does not substantially change as the pressure increases and the etch rate of the silicon nitride film increases as the pressure increases in the corresponding pressure range
- the pressure in this pressure range by appropriately adjusting the pressure in this pressure range, the It is possible to increase the etching selectivity of the silicon nitride film.
- a pressure range in which the rate of change of the etch rates of the silicon nitride film and the oxide film is different is found, and the pressure condition can be selected so that the etching selectivity is maximized.
- the pressure range is exemplified as 130 mTorr to 270 mTorr, considering the gradient of the etch rate of the silicon nitride film and the silicon oxide film according to the pressure, and maximizing the etching selectivity, but the present invention provides this pressure range (and application power range), and may be similarly applied to other pressure ranges with a large difference in the slope of the etch rate according to the pressure.
- the pressure range may be any range capable of increasing the etching selectivity within the range of 1 mTorr to 10 Torr.
- the etch rate of the silicon oxide film is greatly increased, whereas the relative increase rate of the silicon oxide film is small. Accordingly, as can be seen from FIG. 5 , under the same pressure condition, the lower the applied power for direct plasma generation, the higher the etching selectivity of the silicon nitride film to the silicon oxide film. However, since the etch rate of the silicon nitride film decreases as the applied power is lowered, when the etch selectivity is increased by adjusting the applied power, it is preferable to determine the applied power so that the etch rate does not excessively decrease.
- the applied power is exemplified in the range of 240W or more and 320W or less, but the present invention is not limited thereto.
- the range of the applied power may be any range capable of increasing the etching selectivity within the range of 10 W or more and 50,000 W or less.
- a semiconductor device can be manufactured on a substrate by using the above-described etching method of the present invention.
- a method of manufacturing a semiconductor device according to an embodiment of the present invention includes a deposition step of depositing a silicon-containing film including a silicon nitride film (first silicon-containing film) and a silicon oxide film (second silicon-containing film) on a substrate; , etching the silicon nitride film with a high selectivity to the silicon oxide film using the etching method according to the present invention described above.
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Abstract
Description
Claims (10)
- 실리콘 함유막의 에칭 방법으로서,에칭 장치의 공정 챔버내로 제1 실리콘 함유막 및 제2 실리콘 함유막을 포함하는 기판을 도입하는 단계와,상기 공정 챔버에 F3NO를 포함하는 적어도 하나의 에칭 가스를 공급하는 단계와,소정의 압력으로 유지되는 상기 공정 챔버에 소정의 파워를 인가하여 상기 공정 챔버내에 다이렉트 플라즈마를 생성하는 단계와,상기 다이렉트 플라즈마에 의해 활성화된 에칭 가스의 활성종(radical)에 의해 상기 기판상의 상기 제1 실리콘 함유막을 에칭하는 단계를 포함하며,상기 소정의 압력은, 상기 제1 실리콘 함유막의 에치 레이트의 압력에 대한 기울기가 상기 제2 실리콘 함유막의 에치 레이트의 압력에 대한 기울기와 그 부호가 다른 소정의 범위내로 설정되는 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제1항에 있어서,상기 제1 실리콘 함유막은 실리콘 질화막이고, 상기 제2 실리콘 함유막은 실리콘 산화막인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제2항에 있어서,상기 소정의 압력은, 실리콘 질화막의 에치 레이트의 압력에 대한 기울기가 플러스이고 실리콘 산화막의 에치 레이트의 압력에 대한 기울기가 마이너스인 범위내에서 그 중간값보다 큰 값으로 설정되는 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제3항에 있어서,상기 소정의 압력은 1 mTorr ~ 10 Torr의 범위내인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제4항에 있어서상기 소정의 압력은 200mTorr 이상 270mTorr 이하인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제3항에 있어서,상기 소정의 파워는 10 W 이상 50,000W 이하의 범위내인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제5항에 있어서,상기 소정의 파워는 240W 이상 320W이하인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제1항에 있어서,상기 에칭 장치는 다이렉트 CCP 장치인 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 제1항에 있어서,상기 에칭 가스는 수소원자를 포함하는 제어가스를 더 포함하는 것을 특징으로 하는 실리콘 함유막의 에칭 방법.
- 기판상에 제1 실리콘 함유막 및 제2 실리콘 함유막을 포함하는 실리콘 함유막을 형성하는 증착 단계와,제1항 내지 제9항 중 어느 한 항의 에칭 방법을 사용하여 실리콘 함유막을 에칭하는 에칭 단계를 포함하는 것을 특징으로 하는 반도체 디바이스의 제조방법.
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JP2023535290A JP2024501447A (ja) | 2020-12-09 | 2021-11-11 | シリコン含有膜のエッチング方法及びこれを含む半導体デバイスの製造方法 |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR19980071698A (ko) * | 1997-02-25 | 1998-10-26 | 세끼자와 다다시 | 질화 실리콘층의 에칭 방법 및 반도체 장치의 제조 방법 |
US20030143846A1 (en) * | 2000-09-25 | 2003-07-31 | Akira Sekiya | Gas compositions for cleaning the interiors of reactors as well as for etching films of silicon- containing compounds |
KR20170042044A (ko) * | 2015-10-08 | 2017-04-18 | 주식회사 테스 | 실리콘나이트라이드막의 건식식각방법 |
KR20180030430A (ko) * | 2016-09-15 | 2018-03-23 | 도쿄엘렉트론가부시키가이샤 | 산화 실리콘 및 질화 실리콘을 서로 선택적으로 에칭하는 방법 |
KR20180068290A (ko) * | 2016-12-13 | 2018-06-21 | 도쿄엘렉트론가부시키가이샤 | 질화 실리콘으로 형성된 제 1 영역을 산화 실리콘으로 형성된 제 2 영역에 대하여 선택적으로 에칭하는 방법 |
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US10529581B2 (en) * | 2017-12-29 | 2020-01-07 | L'Air Liquide, Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | SiN selective etch to SiO2 with non-plasma dry process for 3D NAND device applications |
KR102010466B1 (ko) | 2018-11-23 | 2019-08-13 | 한국화학연구원 | 산화 삼불화아민 효과적 제조방법 및 장치 |
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Publication number | Priority date | Publication date | Assignee | Title |
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KR19980071698A (ko) * | 1997-02-25 | 1998-10-26 | 세끼자와 다다시 | 질화 실리콘층의 에칭 방법 및 반도체 장치의 제조 방법 |
US20030143846A1 (en) * | 2000-09-25 | 2003-07-31 | Akira Sekiya | Gas compositions for cleaning the interiors of reactors as well as for etching films of silicon- containing compounds |
KR20170042044A (ko) * | 2015-10-08 | 2017-04-18 | 주식회사 테스 | 실리콘나이트라이드막의 건식식각방법 |
KR20180030430A (ko) * | 2016-09-15 | 2018-03-23 | 도쿄엘렉트론가부시키가이샤 | 산화 실리콘 및 질화 실리콘을 서로 선택적으로 에칭하는 방법 |
KR20180068290A (ko) * | 2016-12-13 | 2018-06-21 | 도쿄엘렉트론가부시키가이샤 | 질화 실리콘으로 형성된 제 1 영역을 산화 실리콘으로 형성된 제 2 영역에 대하여 선택적으로 에칭하는 방법 |
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