WO2016068004A1 - プラズマエッチング方法 - Google Patents
プラズマエッチング方法 Download PDFInfo
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- WO2016068004A1 WO2016068004A1 PCT/JP2015/079785 JP2015079785W WO2016068004A1 WO 2016068004 A1 WO2016068004 A1 WO 2016068004A1 JP 2015079785 W JP2015079785 W JP 2015079785W WO 2016068004 A1 WO2016068004 A1 WO 2016068004A1
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- Prior art keywords
- etching
- silicon
- film
- silicon oxide
- plasma
- Prior art date
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001020 plasma etching Methods 0.000 title claims abstract description 34
- 238000005530 etching Methods 0.000 claims abstract description 123
- 239000007789 gas Substances 0.000 claims abstract description 53
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 48
- 229910052581 Si3N4 Inorganic materials 0.000 claims abstract description 38
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims abstract description 38
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 23
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims abstract description 5
- 125000003709 fluoroalkyl group Chemical group 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 47
- 239000010703 silicon Substances 0.000 claims description 20
- NOPJRYAFUXTDLX-UHFFFAOYSA-N 1,1,1,2,2,3,3-heptafluoro-3-methoxypropane Chemical compound COC(F)(F)C(F)(F)C(F)(F)F NOPJRYAFUXTDLX-UHFFFAOYSA-N 0.000 claims description 11
- HRXXERHTOVVTQF-UHFFFAOYSA-N 1,1,1,2,3,3,3-heptafluoro-2-methoxypropane Chemical compound COC(F)(C(F)(F)F)C(F)(F)F HRXXERHTOVVTQF-UHFFFAOYSA-N 0.000 claims description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 13
- 239000001301 oxygen Substances 0.000 abstract description 13
- 229910052760 oxygen Inorganic materials 0.000 abstract description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract description 11
- 239000001257 hydrogen Substances 0.000 abstract description 6
- 229910052739 hydrogen Inorganic materials 0.000 abstract description 6
- 239000011368 organic material Substances 0.000 abstract description 5
- 239000002210 silicon-based material Substances 0.000 abstract description 4
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical class [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 abstract 1
- 229920002120 photoresistant polymer Polymers 0.000 description 26
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 21
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 20
- 230000000052 comparative effect Effects 0.000 description 13
- 239000000758 substrate Substances 0.000 description 9
- 229910052731 fluorine Inorganic materials 0.000 description 7
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 6
- 239000011737 fluorine Substances 0.000 description 6
- 150000003377 silicon compounds Chemical class 0.000 description 6
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 4
- 238000001312 dry etching Methods 0.000 description 4
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 229910052786 argon Inorganic materials 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000001307 helium Substances 0.000 description 3
- 229910052734 helium Inorganic materials 0.000 description 3
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- LGPPATCNSOSOQH-UHFFFAOYSA-N 1,1,2,3,4,4-hexafluorobuta-1,3-diene Chemical compound FC(F)=C(F)C(F)=C(F)F LGPPATCNSOSOQH-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 150000002222 fluorine compounds Chemical class 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- GCDWNCOAODIANN-UHFFFAOYSA-N 1,1,1,2,2-pentafluoro-2-methoxyethane Chemical compound COC(F)(F)C(F)(F)F GCDWNCOAODIANN-UHFFFAOYSA-N 0.000 description 1
- JZBQCJRCMQCPKE-UHFFFAOYSA-N 1,1,1,3,3-pentafluoro-2-(1,1,1,3,3-pentafluoropropan-2-yloxy)propane Chemical compound FC(F)C(C(F)(F)F)OC(C(F)F)C(F)(F)F JZBQCJRCMQCPKE-UHFFFAOYSA-N 0.000 description 1
- YQQHEHMVPLLOKE-UHFFFAOYSA-N 1,1,2,2-tetrafluoro-1-methoxyethane Chemical compound COC(F)(F)C(F)F YQQHEHMVPLLOKE-UHFFFAOYSA-N 0.000 description 1
- YBMDPYAEZDJWNY-UHFFFAOYSA-N 1,2,3,3,4,4,5,5-octafluorocyclopentene Chemical compound FC1=C(F)C(F)(F)C(F)(F)C1(F)F YBMDPYAEZDJWNY-UHFFFAOYSA-N 0.000 description 1
- OVGRCEFMXPHEBL-UHFFFAOYSA-N 1-ethenoxypropane Chemical compound CCCOC=C OVGRCEFMXPHEBL-UHFFFAOYSA-N 0.000 description 1
- BSYNRYMUTXBXSQ-UHFFFAOYSA-N Aspirin Chemical compound CC(=O)OC1=CC=CC=C1C(O)=O BSYNRYMUTXBXSQ-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 229910021417 amorphous silicon Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910021419 crystalline silicon Inorganic materials 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- DPYMFVXJLLWWEU-UHFFFAOYSA-N desflurane Chemical compound FC(F)OC(F)C(F)(F)F DPYMFVXJLLWWEU-UHFFFAOYSA-N 0.000 description 1
- 238000007865 diluting Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 229910052743 krypton Inorganic materials 0.000 description 1
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 125000001570 methylene group Chemical group [H]C([H])([*:1])[*:2] 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 229910052756 noble gas Inorganic materials 0.000 description 1
- 150000002835 noble gases Chemical class 0.000 description 1
- 125000004430 oxygen atom Chemical group O* 0.000 description 1
- -1 perfluoro Chemical group 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- H01J37/32431—Constructional details of the reactor
- H01J37/3244—Gas supply means
-
- 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
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- 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
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
Definitions
- the present invention relates to a plasma etching method using a processing gas under plasma conditions in a semiconductor device manufacturing process, wherein silicon oxide and at least one selected from the group consisting of silicon nitride, silicon, and an organic film are simultaneously used.
- the present invention relates to a method of selectively plasma-etching silicon oxide during etching.
- a silicon compound film for example, SiO 2 film, Si 3 N 4 (SiN) film, SiC film, etc.
- etching selectivity between a silicon compound film to be processed and a silicon compound film or an organic film that is not required to be processed (non-processing target) mixed on the same substrate is important.
- Non-Patent Document 1 and Patent Document 1 for etching a silicon oxide film, fluorocarbons such as C 4 F 6 , C 4 F 8 and C 5 F 8 , and hydrofluorocarbons such as CH 3 F and C 5 HF 7 are used. Is described as a process gas.
- the aforementioned fluorocarbon and hydrofluorocarbon are usually used by mixing with a rare gas such as argon or oxygen during plasma etching. This is because when only fluorocarbon or hydrofluorocarbon is used as a processing gas, a thick plasma polymerized film is formed on the substrate and etching does not proceed.
- the rare gas is used for the purpose of diluting fluorocarbon or hydrofluorocarbon
- oxygen is a precursor of the plasma polymerized film, and is an active species contributing to etching
- CFx (x is an integer of 1 to 3). Used to control the amount. When the amount of CFx is large, a polymerized film is formed on the substrate, and etching proceeds only when the amount becomes appropriate.
- ⁇ In order to control the amount of CFx it is usually adjusted by the flow rate of oxygen to be mixed. For example, when the oxygen mixing flow rate is increased little by little, the polymerization rate of the silicon oxide gradually decreases, and the silicon oxide is etched from the oxygen mixing flow rate region where the formation of the polymer film has preferentially occurred. Changes to the oxygen flow rate range. If the etching rate of silicon oxide is sufficiently high with respect to an organic film such as silicon nitride, silicon, or photoresist in this flow rate region, it is possible to etch silicon oxide with a good selectivity.
- hydrofluorocarbons are more easily polymerized than fluorocarbons, and it is extremely difficult to adjust the flow rate of gas that simultaneously satisfies a sufficient etching rate and high etching selectivity when oxygen is added to control etching.
- silicon non-processing objects such as silicon nitride, silicon, and organic films are mixed on the substrate, and if a condition that maintains a high selection ratio for any material is selected, silicon Since the etching rate of the oxide film is lowered, the productivity of the etching process is also problematic.
- the present invention has been made in view of the above prior art, and in silicon oxide etching, silicon nitride, silicon, and organic materials can be obtained while obtaining a sufficiently high etching rate without using oxygen or hydrogen. It is an object of the present invention to provide a plasma etching method capable of realizing high etching selectivity.
- the present inventor has intensively studied a plasma etching method of a silicon oxide film using various compounds as etching gases.
- a plasma etching method of a silicon oxide film using various compounds as etching gases As a result, when hydrofluoroether satisfying certain conditions is used as a processing gas for plasma etching, a sufficient etching rate and at least one kind of non-processed object selected from silicon nitride, silicon, and organic film can be obtained.
- the inventors have found that a high etching selectivity can be obtained at the same time, and have completed the present invention.
- the following plasma etching methods (1) to (4) are provided.
- a plasma etching method using a processing gas under plasma conditions wherein at least one selected from hydrofluoroethers represented by formula (I) is used as a processing gas.
- R represents a hydrogen atom or a fluoroalkyl group represented by C n F 2n + 1 .
- m and n are positive integers satisfying 1 ⁇ m ⁇ 3 and 3 ⁇ (m + n) ⁇ 4.
- the hydrofluoroether is at least one selected from the group consisting of 1,1,2,2,3,3,3-heptafluoropropyl methyl ether and heptafluoroisopropyl methyl ether.
- Plasma etching method As the treatment gas, the hydrofluoroether represented by the formula (I) and the rare gas are used in an amount of 20 to 3000 rare gases with respect to 100 parts by volume of the hydrofluoroether represented by the formula (I).
- the silicon oxide is selectively etched when simultaneously etching silicon oxide and at least one selected from the group consisting of silicon nitride, silicon, and an organic material.
- high etching selectivity with silicon nitride, silicon, and organic materials can be obtained while obtaining a sufficiently high etching rate without using oxygen or hydrogen in the etching of silicon oxide. Can be realized.
- the present invention relates to a plasma etching method using a processing gas under plasma conditions, wherein at least one selected from hydrofluoroethers represented by the formula (I) is used as a processing gas. Is the method.
- plasma etching means that a high-frequency electric field is applied to a processing gas to cause glow discharge, and the processing gas is separated into chemically active ions, electrons, and neutral species, and these active species are separated. Etching is performed using a chemical reaction and a physical collision reaction between the material and the material to be etched.
- hydrofluoroether (I) At least one selected from hydrofluoroethers represented by the following formula (I) (hereinafter sometimes referred to as “hydrofluoroether (I)”) is used as the processing gas.
- R represents a hydrogen atom or a fluoroalkyl group represented by C n F 2n + 1 .
- m and n are positive integers satisfying 1 ⁇ m ⁇ 3 and 3 ⁇ (m + n) ⁇ 4. )]
- hydrofluoroether (I) examples include CF 3 —O—CH 2 —C 2 F 5 , CF 3 —O—CH 2 —n—C 3 F 7 , and CF 3 —O—CH 2 —i. —C 3 F 7 , C 2 F 5 —O—CH 2 —CF 3 , C 2 F 5 —O—CH 2 —C 2 F 5 , nC 3 F 7 —O—CH 3 , iC 3 F 7 —O—CH 3 may be mentioned.
- the hydrofluoroether (I) is nC 3 F 7 -O, from the viewpoint of obtaining a sufficient etching rate and a high etching selectivity with respect to a non-processed object at the same time.
- the hydrofluoroether used in the present invention is characterized by not having both fluorine and hydrogen elements on the same carbon as in the above formula (I).
- fluorine and hydrogen are present on the same carbon, in the plasma environment where etching is performed, hydrogen is less likely to dissociate from carbon than the methyl group (—CH 3 ) and methylene group (—CH 2 —), and is free in the plasma environment. This is because the collected fluorine cannot be captured. If the liberated fluorine cannot be captured, the etching selectivity with respect to the silicon nitride film and the resist is lowered.
- the number of carbon atoms in the hydrofluoroether molecule is small, it becomes difficult to form a deposited film on the silicon nitride film or the photoresist, so that the etching selectivity is lowered.
- the number of carbon atoms is preferably 4 or more, and more preferably 4 or more and 5 or less. If the number of carbon atoms exceeds 5, the boiling point of the hydrofluoroether increases, making it difficult to use for etching.
- the treatment gas may be a mixture of the hydrofluoroether (I) and a rare gas.
- the rare gas include at least one selected from the group consisting of helium, argon, neon, krypton, and xenon.
- the mixing ratio of the rare gas is 20 to 3000 parts by volume with respect to 100 parts by volume of the hydrofluoroether (I). It is preferably 1000 to 2500 volume parts, more preferably 1800 to 2200 volume parts.
- Each gas used as a soot processing gas is usually filled and transported in a container such as a cylinder, and connected and installed in a dry etching facility (dry etching chamber). Then, by opening the valve of the cylinder, each gas is introduced into a dry etching chamber that receives the action of plasma, and the plasma acts on each gas, so that dry etching proceeds.
- the plasma etching method of the present invention is characterized in that when silicon oxide, silicon nitride, silicon, and an organic film are etched simultaneously, silicon oxide is selectively etched with respect to each of the silicon nitride, silicon, and organic film.
- silicon oxide in the present invention refers to a silicon compound containing an oxygen atom such as SiO 2 , SiOC, or SiOCH.
- Silicon nitride is a silicon compound containing nitrogen atoms such as Si 3 N 4 (SiN) or SiCN. Examples of “silicon” include crystalline silicon, polycrystalline silicon, and amorphous silicon.
- Organic material refers to a carbon-based material such as photoresist or amorphous carbon.
- the plasma etching method of the present invention can be carried out using a plasma etching apparatus.
- the plasma etching apparatus to be used is not particularly limited, and a conventionally known plasma etching apparatus may be used.
- devices such as a helicon wave method, a high frequency induction method, a parallel plate type, a magnetron method, and a microwave method can be used.
- parallel plate type, high frequency induction type and microwave type devices that can easily generate plasma in a high density region are preferably used, but are not particularly limited thereto.
- the plasma etching conditions are not particularly limited, and may be performed under conventionally known etching conditions, for example, a parallel plate type, an upper electrode of 60 MHz, a lower electrode of 2 MHz, and a distance between these electrodes of 35 mm.
- the power supplied to the upper electrode can be freely combined in the range of 200 W to 2000 W, and the power supplied to the lower electrode can be 0 to 600 W.
- the substrate temperature is preferably controlled using helium gas and a cooling device, and the control temperature ranges from ⁇ 50 ° C. to + 60 ° C., more preferably from ⁇ 20 ° C. to + 40 ° C., and even more preferably from ⁇ 10 ° C. to + 20 ° C. Set with.
- the pressure in the reaction chamber of the plasma etching apparatus is in the range of 1 Pa to 10 Pa.
- a silicon substrate piece having a silicon oxide film (SiO 2 ), a silicon nitride film (Si 3 N 4 ), a polycrystalline silicon film, and a photoresist coating film for an ArF excimer laser is simultaneously introduced into a plasma etching apparatus, and plasma etching is performed. It was.
- the etching rate was calculated from the change of each film thickness before and after the etching. Further, when a polymerized film was formed without progressing etching, a negative sign was added to the film thickness divided by the etching time, and the etching rate was expressed.
- the etching selectivity was obtained by dividing the etching rate of the silicon oxide film by the etching rate of each film to be selected.
- etching apparatus As an etching apparatus, a parallel plate type was used, and an upper electrode of 60 MHz and a lower electrode of 2 MHz were installed at an interval of 35 mm. Etching is performed for 60 seconds with the power of the upper electrode being 600 W, the power of the lower electrode being 240 W, the pressure in the chamber being constant at 2 Pa, and the cooling of the lower part being 0 ° C. and the helium pressure being set to 1000 Pa. It was. As processing gases, 1,1,2,2,3,3,3-heptafluoropropyl methyl ether (C 4 H 3 F 7 O) was introduced into the plasma apparatus at 10 sccm and argon at 200 sccm.
- C 4 H 3 F 7 O 1,1,2,2,3,3,3-heptafluoropropyl methyl ether
- the etching rate of the silicon oxide film is 258 nm / min
- the etching rate of the silicon nitride film is ⁇ 118 nm / min
- the etching rate of the polycrystalline silicon film is ⁇ 45 nm / min
- the etching rate of the photoresist is 9.6 nm / min. min.
- the etching selectivity of the silicon oxide film was infinite ( ⁇ ) for the silicon nitride film and polycrystalline silicon, and 27.0 for the photoresist.
- Example 2 Changing the processing gas from 1,1,2,2,3,3,3-heptafluoropropyl methyl ether (C 4 H 3 F 7 O) to heptafluoroisopropyl methyl ether (C 4 H 3 F 7 O) Except for the above, etching was performed under the same conditions as in Example 1. As a result of etching, the etching rate of the silicon oxide film is 278 nm / min, the etching rate of the silicon nitride film is ⁇ 116 nm / min, the etching rate of the polycrystalline silicon film is ⁇ 61 nm / min, and the etching rate of the photoresist is ⁇ 54 nm / min. Met. The etching selectivity of the silicon oxide film is infinite for all of the silicon nitride film, polycrystalline silicon, and photoresist.
- etching rate of the silicon oxide film is 225 nm / min
- the etching rate of the silicon nitride film is 266 nm / min
- the etching rate of the polycrystalline silicon film is ⁇ 39 nm / min
- the etching rate of the photoresist is ⁇ 41 nm / min. there were.
- the etching selectivity of the silicon oxide film was 0.8 for the silicon nitride film and infinite for the polycrystalline silicon and the photoresist.
- etching rate of the silicon oxide film is 272 nm / min
- the etching rate of the silicon nitride film is 267 nm / min
- the etching rate of the polycrystalline silicon film is 10.4 nm / min
- the etching rate of the photoresist is 40 nm / min. there were.
- the etching selectivity of the silicon oxide film was 1.0 for the silicon nitride film, 26 for the polycrystalline silicon, and 6.8 for the photoresist.
- etching rate of the silicon oxide film was 239 nm / min
- the etching rate of the silicon nitride film was 308 nm / min
- the etching rate of the polycrystalline silicon film was ⁇ 53 nm / min
- the etching rate of the photoresist was 23 nm / min. It was.
- the etching selectivity of the silicon oxide film was 0.8 for the silicon nitride film, infinite for the polycrystalline silicon, and 10 for the photoresist.
- etching was performed under the same conditions as in Comparative Example 6 except that the processing gas was changed from hexafluoro-1,3-butadiene (C 4 F 6 ) to octafluorocyclopentene (C 5 F 8 ).
- the etching rate of the silicon oxide film is 80 nm / min
- the etching rate of the silicon nitride film is ⁇ 38 nm / min
- the etching rate of the polycrystalline silicon film is 29 nm / min
- the etching rate of the photoresist is ⁇ 2.0 nm / min. min.
- the etching selectivity of the silicon oxide film was infinite for the silicon nitride film, 2.8 for the polycrystalline silicon, and infinite for the photoresist.
- the fluorine compounds used as components of the processing gas are as follows.
- G CH 3 —O—CF 2 —CF 3 H: C 4 F 6 I: C 5 F 8
- Table 1 shows the following.
- Examples 1 and 2 an infinite or very high etching selectivity can be obtained for silicon nitride, silicon and photoresist while maintaining the etching rate of silicon oxide at 200 nm / min or more.
- Comparative Examples 1 to 5 although the etching rate is sufficiently high, the selectivity with silicon nitride or photoresist cannot be obtained.
- Comparative Examples 6 and 7 although a high etching selectivity can be obtained, the etching rate of silicon oxide is low.
- a high silicon oxide etching selectivity can be obtained for silicon nitride, silicon, and photoresist.
- Silicon oxide is selectively used not only for substrates with mixed films or substrates with mixed silicon oxide and silicon, but also for substrates with mixed silicon materials such as silicon oxide, silicon nitride, silicon, and photoresist. Can be etched.
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Abstract
Description
ここで希ガスは、フルオロカーボンやハイドロフルオロカーボンを希釈することを目的に用い、酸素は、プラズマ重合膜の前駆体であり、エッチングに寄与する活性種でもあるCFx(xは1~3の整数)の量を制御するために用いられる。CFxの量が多いと基板上で重合膜形成が起こり、適切な量となった段階ではじめてエッチングが進行する。
しかしながら、水素ガスを用いることは安全対策上容易ではなく、また水素ガスと酸素ガスとを同時に用いることは更に容易ではない。
しかし、ハイドロフルオロカーボンは、フルオロカーボンと比較して重合しやすく、酸素を添加することでエッチングを制御しようとすると、十分なエッチング速度と高いエッチング選択性を同時に満たすガスの流量調整が極めて困難となる。
かくして本発明によれば、下記(1)~(4)のプラズマエッチング方法が提供される。
(2)前記ハイドロフルオロエーテルが、1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル、及び、ヘプタフルオロイソプロピルメチルエーテルからなる群より選ばれる少なくとも1種である、(1)に記載のプラズマエッチング方法。
(3)前記処理ガスとして、前記式(I)で表されるハイドロフルオロエーテルと希ガスを、前記式(I)で表されるハイドロフルオロエーテル100容量部に対して、希ガスを20~3000容量部含有するものを用いる、(1)または(2)に記載のプラズマエッチング方法。
(4)シリコン酸化物と、シリコン窒化物、シリコンおよび有機材料からなる群から選ばれる少なくとも一種とを同時にエッチングする際、シリコン酸化物を選択的にエッチングすることを特徴とする、(1)~(3)のいずれかに記載のプラズマエッチング方法。
本発明は、プラズマ条件下において処理ガスを用いるプラズマエッチング方法であって、前記式(I)で表されるハイドロフルオロエーテルより選ばれる少なくとも1種を処理ガスして用いることを特徴とするプラズマエッチング方法である。
「シリコン窒化物」とは、Si3N4(SiN)、SiCNなど窒素原子を含有するシリコン化合物のことである。
また「シリコン」とは、例えば結晶シリコンや多結晶シリコン、アモルファスシリコンなどが挙げられる。
「有機材料」とは、フォトレジストやアモルファスカーボンなどの炭素系材料のことを表す。
基板温度は、ヘリウムガスと冷却装置を用いて制御を行うことが好ましく、制御温度は-50℃~+60℃、より好ましくは-20℃~+40℃、更に好ましくは-10℃~+20℃の範囲で設定する。プラズマエッチング装置の反応チャンバー内の圧力は1Pa~10Paの範囲である。
シリコン酸化膜(SiO2)、シリコン窒化膜(Si3N4)、多結晶シリコン膜、ArFエキシマレーザー用のフォトレジスト塗布膜を有するシリコン基板片を同時にプラズマエッチング装置に導入し、プラズマエッチングを行った。エッチング前後の各膜厚の変化からエッチング速度を算出した。またエッチングが進行せず重合膜が生成した場合は、その膜厚をエッチング時間で除したものに負の符号を付けてエッチング速度として表した。
エッチング選択比はシリコン酸化膜のエッチング速度を選択対象とする各膜のエッチング速度で割ることで求めた。
エッチング装置としては、平行平板タイプのものを使用し、60MHzの上部電極と2MHzの下部電極を35mmの間隔で設置した。
エッチングは、上部電極の電力を600W、下部電極の電力を240Wとし、チャンバー内圧力を2Paで一定にし、下部の冷却は、冷却ユニットを0℃とし、ヘリウム圧力を1000Paに設定し、60秒間行った。
処理ガスとして、1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)を10sccm、アルゴンを200sccmでプラズマ装置に導入した。
エッチングの結果、シリコン酸化膜のエッチング速度は258nm/min、シリコン窒化膜のエッチング速度は-118nm/min、多結晶シリコン膜のエッチング速度は-45nm/min、フォトレジストのエッチング速度は9.6nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜および多結晶シリコンに対して無限大(∞)であり、フォトレジストに対して27.0であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)からヘプタフルオロイソプロピルメチルエーテル(C4H3F7O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は278nm/min、シリコン窒化膜のエッチング速度は-116nm/min、多結晶シリコン膜のエッチング速度は-61nm/min、フォトレジストのエッチング速度は-54nm/minであった。シリコン酸化膜のエッチング選択比は、シリコン窒化膜、多結晶シリコン、フォトレジストいずれに対しても無限大であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から1,1,2,2-テトラフルオロエチルメチルエーテル(C3H4F4O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は225nm/min、シリコン窒化膜のエッチング速度は266nm/min、多結晶シリコン膜のエッチング速度は-39nm/min、フォトレジストのエッチング速度は-41nm/minであった。シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して0.8であり多結晶シリコンおよびフォトレジストに対して無限大であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から、(1,2,2,2-テトラフルオロエチル)ジフルオロメチルエーテル(C3H2F6O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は272nm/min、シリコン窒化膜のエッチング速度は267nm/min、多結晶シリコン膜のエッチング速度は10.4nm/min、フォトレジストのエッチング速度は40nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して1.0であり、多結晶シリコンに対して26であり、フォトレジストに対して6.8であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から、パーフルオロ(n-プロピルビニルエーテル)(C5F10O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は423nm/min、シリコン窒化膜のエッチング速度は84nm/min、多結晶シリコン膜のエッチング速度は62nm/min、フォトレジストのエッチング速度は202nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して5.0であり、多結晶シリコンに対して6.9であり、フォトレジストに対して2.1であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から、ジフルオロメチル-2,2,2-トリフルオロエチルエーテル(C3H3F5O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は239nm/min、シリコン窒化膜のエッチング速度は308nm/min、多結晶シリコン膜のエッチング速度は-53nm/min、フォトレジストのエッチング速度は23nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して0.8であり、多結晶シリコンに対して無限大であり、フォトレジストに対して10であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から、1,1,2,2,2-ペンタフルオロエチルメチルエーテル(C3H3F5O)に変更すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は227nm/min、シリコン窒化膜のエッチング速度は293nm/min、多結晶シリコン膜のエッチング速度は-46nm/min、フォトレジストのエッチング速度は-43nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して0.8であり、多結晶シリコンおよびフォトレジストいずれに対しても無限大であった。
処理ガスを1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル(C4H3F7O)から、ヘキサフルオロ-1,3-ブタジエン(C4F6)に変更し、酸素を5sccmで添加すること以外は、実施例1と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は83nm/min、シリコン窒化膜のエッチング速度は-20nm/min、多結晶シリコン膜のエッチング速度は8.6nm/min、フォトレジストのエッチング速度は2.5nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して無限大であり、多結晶シリコンに対して9.6であり、フォトレジストに対して33であった。
処理ガスをヘキサフルオロ-1,3-ブタジエン(C4F6)からオクタフルオロシクロペンテン(C5F8)に変更すること以外は比較例6と同じ条件でエッチングを行った。
エッチングの結果、シリコン酸化膜のエッチング速度は80nm/min、シリコン窒化膜のエッチング速度は-38nm/min、多結晶シリコン膜のエッチング速度は29nm/min、フォトレジストのエッチング速度は-2.0nm/minであった。
シリコン酸化膜のエッチング選択比は、シリコン窒化膜に対して無限大であり、多結晶シリコンに対して2.8であり、フォトレジストに対して無限大であった。
A:CF3-CF2-CF2-O-CH3
B:CH3-O-CF(CF3)2
C:CHF2-CF2-O-CH3
D:CF3-CHF-O-CHF2
E:CF3-CF2-CF2-O-CF=CF2
F:CHF2-O-CH2-CF3
G:CH3-O-CF2-CF3
H:C4F6
I:C5F8
実施例1、2においては、シリコン酸化物のエッチング速度を200nm/min以上を維持しながら、シリコン窒化物、シリコンおよびフォトレジストに対し無限大或いは非常に高いエッチング選択比を得ることができる。他方比較例1~5においては、エッチング速度は十分高いもののシリコン窒化物やフォトレジストとの選択比が取れない。また比較例6、7においては、高いエッチング選択比は得られるものの、シリコン酸化物のエッチング速度が低い。
Claims (4)
- 前記ハイドロフルオロエーテルが、1,1,2,2,3,3,3-ヘプタフルオロプロピルメチルエーテル、及び、ヘプタフルオロイソプロピルメチルエーテルからなる群より選ばれる少なくとも1種である、請求項1に記載のプラズマエッチング方法。
- 前記処理ガスとして、前記式(I)で表されるハイドロフルオロエーテルと希ガスを、前記式(I)で表されるハイドロフルオロエーテル100容量部に対して、希ガスを20~3000容量部含有するものを用いる、請求項1または2に記載のプラズマエッチング方法。
- シリコン酸化物と、シリコン窒化物、シリコンおよび有機膜からなる群から選ばれる少なくとも一種とを同時にエッチングする際、シリコン酸化物を選択的にエッチングすることを特徴とする、請求項1~3のいずれかに記載のプラズマエッチング方法。
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JP2018046185A (ja) * | 2016-09-15 | 2018-03-22 | 東京エレクトロン株式会社 | 酸化シリコン及び窒化シリコンを互いに選択的にエッチングする方法 |
US10305029B1 (en) | 2017-11-10 | 2019-05-28 | International Business Machines Corporation | Image reversal process for tight pitch pillar arrays |
US10304692B1 (en) * | 2017-11-28 | 2019-05-28 | International Business Machines Corporation | Method of forming field effect transistor (FET) circuits, and forming integrated circuit (IC) chips with the FET circuits |
KR102104240B1 (ko) | 2018-08-13 | 2020-04-24 | 아주대학교 산학협력단 | 플라즈마 식각 방법 |
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Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10140151A (ja) * | 1996-11-05 | 1998-05-26 | Agency Of Ind Science & Technol | ドライエッチング用ガス |
JP2006074013A (ja) * | 2004-07-23 | 2006-03-16 | Air Products & Chemicals Inc | 基板から炭素含有残渣類を除去する方法 |
WO2011047302A2 (en) * | 2009-10-16 | 2011-04-21 | Matheson Tri-Gas | Chamber cleaning methods using fluorine containing cleaning compounds |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5440170B2 (ja) | 1973-10-22 | 1979-12-01 | ||
US6121163A (en) * | 1996-02-09 | 2000-09-19 | Applied Materials, Inc. | Method and apparatus for improving the film quality of plasma enhanced CVD films at the interface |
JPH10223614A (ja) * | 1997-02-12 | 1998-08-21 | Daikin Ind Ltd | エッチングガスおよびクリーニングガス |
JP3400770B2 (ja) * | 1999-11-16 | 2003-04-28 | 松下電器産業株式会社 | エッチング方法、半導体装置及びその製造方法 |
US6455479B1 (en) * | 2000-08-03 | 2002-09-24 | Shipley Company, L.L.C. | Stripping composition |
KR20020017182A (ko) * | 2000-08-29 | 2002-03-07 | 윤종용 | 옥타플루오로부텐으로 이루어지는 식각 가스를 이용한반도체 소자의 제조방법 |
US7256134B2 (en) * | 2003-08-01 | 2007-08-14 | Applied Materials, Inc. | Selective etching of carbon-doped low-k dielectrics |
CN101015044A (zh) * | 2004-05-31 | 2007-08-08 | 独立行政法人产业技术综合研究所 | 干式蚀刻气体及干式蚀刻方法 |
CN100461344C (zh) * | 2004-07-23 | 2009-02-11 | 气体产品与化学公司 | 从基板上清除含碳的残余物的方法 |
JP2008053507A (ja) * | 2006-08-25 | 2008-03-06 | Matsushita Electric Ind Co Ltd | ドライエッチング方法 |
WO2009142281A1 (ja) * | 2008-05-22 | 2009-11-26 | 旭硝子株式会社 | フッ素化合物による洗浄方法 |
US9028924B2 (en) * | 2010-03-25 | 2015-05-12 | Novellus Systems, Inc. | In-situ deposition of film stacks |
-
2015
- 2015-10-21 TW TW104134474A patent/TWI670768B/zh active
- 2015-10-22 CN CN201580059034.0A patent/CN107112232A/zh active Pending
- 2015-10-22 SG SG11201703122PA patent/SG11201703122PA/en unknown
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- 2015-10-22 KR KR1020177013905A patent/KR102494959B1/ko active IP Right Grant
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH10140151A (ja) * | 1996-11-05 | 1998-05-26 | Agency Of Ind Science & Technol | ドライエッチング用ガス |
JP2006074013A (ja) * | 2004-07-23 | 2006-03-16 | Air Products & Chemicals Inc | 基板から炭素含有残渣類を除去する方法 |
WO2011047302A2 (en) * | 2009-10-16 | 2011-04-21 | Matheson Tri-Gas | Chamber cleaning methods using fluorine containing cleaning compounds |
Non-Patent Citations (1)
Title |
---|
See also references of EP3214640A4 * |
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EP3214640B1 (en) | 2020-01-15 |
JP6696429B2 (ja) | 2020-05-20 |
CN107112232A (zh) | 2017-08-29 |
SG11201703122PA (en) | 2017-06-29 |
EP3214640A4 (en) | 2018-06-20 |
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