WO2004049421A1 - 基板処理容器のクリーニング方法 - Google Patents
基板処理容器のクリーニング方法 Download PDFInfo
- Publication number
- WO2004049421A1 WO2004049421A1 PCT/JP2003/014519 JP0314519W WO2004049421A1 WO 2004049421 A1 WO2004049421 A1 WO 2004049421A1 JP 0314519 W JP0314519 W JP 0314519W WO 2004049421 A1 WO2004049421 A1 WO 2004049421A1
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- WO
- WIPO (PCT)
- Prior art keywords
- cleaning
- substrate processing
- gas
- processing container
- substrate
- Prior art date
Links
- 238000012545 processing Methods 0.000 title claims abstract description 213
- 239000000758 substrate Substances 0.000 title claims abstract description 161
- 238000004140 cleaning Methods 0.000 title claims abstract description 100
- 238000000034 method Methods 0.000 title claims abstract description 61
- 239000010453 quartz Substances 0.000 claims description 25
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 25
- 229910052751 metal Inorganic materials 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 9
- 239000000463 material Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 229910044991 metal oxide Inorganic materials 0.000 claims description 3
- 150000004706 metal oxides Chemical class 0.000 claims description 3
- 150000004767 nitrides Chemical class 0.000 claims description 3
- 150000002222 fluorine compounds Chemical class 0.000 claims description 2
- 229910052740 iodine Inorganic materials 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 229910052702 rhenium Inorganic materials 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- 229910052707 ruthenium Inorganic materials 0.000 claims 1
- 229910021332 silicide Inorganic materials 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 7
- 239000007789 gas Substances 0.000 description 92
- 239000010408 film Substances 0.000 description 69
- 239000004065 semiconductor Substances 0.000 description 46
- 238000005530 etching Methods 0.000 description 22
- 229910052731 fluorine Inorganic materials 0.000 description 17
- 239000011737 fluorine Substances 0.000 description 17
- 230000008569 process Effects 0.000 description 17
- 239000002994 raw material Substances 0.000 description 17
- 238000010586 diagram Methods 0.000 description 14
- 239000010409 thin film Substances 0.000 description 13
- 238000012546 transfer Methods 0.000 description 11
- 238000010438 heat treatment Methods 0.000 description 10
- 230000000694 effects Effects 0.000 description 9
- -1 aluminum compound Chemical class 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 8
- 239000011261 inert gas Substances 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- 238000011109 contamination Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 4
- 238000001816 cooling Methods 0.000 description 4
- 238000005192 partition Methods 0.000 description 4
- 238000010926 purge Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 3
- 238000000151 deposition Methods 0.000 description 3
- 230000008021 deposition Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000012805 post-processing Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 238000005229 chemical vapour deposition Methods 0.000 description 2
- 230000002542 deteriorative effect Effects 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000007781 pre-processing Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 150000003377 silicon compounds Chemical class 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 241000894007 species Species 0.000 description 2
- 229910000859 α-Fe Chemical group 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 241001070941 Castanea Species 0.000 description 1
- 235000014036 Castanea Nutrition 0.000 description 1
- 201000005569 Gout Diseases 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000012159 carrier gas Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005137 deposition process Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000004949 mass spectrometry Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000006798 recombination Effects 0.000 description 1
- 238000005215 recombination Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000004575 stone Substances 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
- H01L21/04—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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4405—Cleaning of reactor or parts inside the reactor by using reactive gases
-
- 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
- H01J37/32357—Generation remote from the workpiece, e.g. down-stream
-
- 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
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32853—Hygiene
- H01J37/32862—In situ cleaning of vessels and/or internal parts
Definitions
- the present invention relates to a method for cleaning a substrate processing container of a substrate processing apparatus, and more particularly, to a method for cleaning a film forming apparatus using remote plasma.
- a predetermined film is formed by placing the substrate to be processed in a substrate processing container.
- a substrate processing container There are many examples of the thin film formed on the substrate to be processed.
- the thin film is formed on the substrate processing container ⁇ , the inner wall thereof, or the member in the substrate processing container such as the substrate holding table by the film forming process. Adhere to form deposits.
- IU increases and the deposit attached in this manner eventually peels off.
- the separated sediment floats in the substrate processing container and is taken into a thin film formed on the substrate to be processed during the film forming process as described above, causing a problem of deteriorating the film quality of the thin film.
- a cleaning method has been proposed for removing the deposits from the substrate processing container as described above (for example, see Japanese Patent Application Laid-Open No. H10-149899).
- a remote plasma generator for generating fluorine radicals is provided outside the substrate processing vessel for cleaning, and NF3 is excited by 2.45 GHz microwaves.
- a method is disclosed in which fluorine radicals are generated, the deposits are vaporized by introducing the fluorine radicals into a substrate processing container, and the deposits are discharged out of the substrate processing container. Disclosure of the invention
- a fluorine radical (F *) is mainly used as a reactive species for cleaning.
- F * a fluorine radical
- the quartz member is etched by the fluorine radical.
- the amount of fluorine radicals is large, although the etching amount is smaller than that of the above-described stone member.
- the ceramic member Since the ceramic member is introduced into the container, the ceramic member is etched by the fluorine radical to form, for example, an aluminum compound and the like, which remains in the substrate processing container and is formed in the film forming process in a thin film. There was a concern that it could be incorporated into the film and the film quality of the thin film could be degraded as film contamination.
- the specific object of the present invention is to use F2 recombined with F radicals as the main reactive species, thereby treating the substrate by F radicals in the conventional cleaning method mainly using F radicals.
- An object of the present invention is to provide a tally / jung method in which damage to members in a container is reduced.
- a cleaning method for cleaning a substrate processing container of a substrate processing apparatus for processing a substrate to be processed
- a gas introduction step of introducing a gas into a remote plasma generation unit installed in the substrate processing apparatus
- the remote plasma generation unit may be configured to excite the gas at a high frequency.
- the frequency of the high frequency can be set to 400 kHz to 3 GHz.
- the gas may be a gas containing a fluorine compound.
- the gas CF 4, C 2 F 6, C 3 F 8, SF 6, Ru can be selected from the group consisting of NF 3.
- the reactive species may include F 2 recombined with F radicals.
- deposits deposited on an exposed portion inside the processing container by the reactive species can be removed.
- the deposit may include any of a metal, a metal nitride, a metal oxide, silicon and a silicon compound.
- the exposed portion may include a member made of quartz.
- the exposed portion may include a member made of a sintered material of A 1 2 0 3.
- the exposed portion may include a member made of an A 1 N sintered material.
- FIG. 1 is a configuration diagram (part 1) of a substrate processing apparatus capable of performing cleaning according to an embodiment of the present invention.
- FIG. 2 is a diagram schematically showing a remote plasma generation source.
- FIG. 3 is a configuration diagram (part 2) of a substrate processing apparatus capable of performing cleaning according to the embodiment of the present invention.
- FIG. 4 is a diagram (part 1) illustrating a cleaning speed according to the embodiment of the present invention.
- FIG. 5 is a diagram (part 2) illustrating the cleaning speed according to the embodiment of the present invention.
- FIG. 6 is a diagram showing the ratio of the cleaning speed according to the embodiment of the present invention.
- FIG. 7 is a configuration diagram (part 3) of a substrate processing apparatus capable of performing cleaning according to the embodiment of the present invention.
- FIG. 8 is a configuration diagram (part 4) of a substrate processing apparatus capable of performing cleaning according to the embodiment of the present invention.
- FIG. 9 is a configuration diagram (part 5) of a substrate processing apparatus capable of performing cleaning according to the embodiment of the present invention.
- FIG. 10 is a configuration diagram (part 6) of a substrate processing apparatus capable of performing cleaning according to an embodiment of the present invention.
- FIG. 11 is a configuration diagram of a cluster tool device capable of performing ft cleaning according to an embodiment of the present invention.
- FIG. 1 is a diagram showing a configuration of a substrate processing apparatus 600 capable of performing cleaning according to an embodiment of the present invention.
- the substrate processing apparatus 600 has a processing container 501 made of, for example, aluminum or the like.
- a gate valve 527 which is opened and closed when the semiconductor substrate 101 is carried in and out is provided on a side wall of the processing vessel 501.
- the semiconductor substrate 101 is placed on a mounting table 603 installed in the processing vessel 501.
- the mounting table 603 is made of, for example, an aluminum compound such as aluminum nitride, and extends from the upper inner wall of a cylindrical partition wall 513 rising from the bottom of the processing vessel 501 (see FIG. 3). Of which only two are shown).
- a plurality of heating lamps 608 serving as heating means and a rotary table 609 also serving as a reflecting mirror are mounted. Times The turntable 6109 is rotated by a motor 610 via a rotating shaft.
- a heating window 606 made of a material such as quartz is provided at an upper portion of the heating chamber 607 formed so as to surround the heating lamp 608.
- the processing vessel 501 is isolated. The heat rays radiated from the heating lamp 608 pass through the transmission window 606 and irradiate the lower surface of the mounting table 603 to heat it.
- a plurality of, for example, three L-shaped lifter pins 505 stand upright with respect to the ring-shaped support member 506. It is provided.
- the support member 506 is moved up and down by a push-up bar 507 provided through the bottom of the processing vessel 501, and a lifter pin hole 500 provided through the lifter pin 505 through the mounting table 603.
- the semiconductor substrate 101 is lifted by passing it through 8.
- the lower end of the push-up bar 507 is connected to an unillustrated actuator through a telescopic bellows 509 in order to ensure airtightness in the processing container 501.
- a ceramic clamp ring member 511 made of, for example, aluminum nitride or the like having a substantially ring shape along the contour of the disk-shaped semiconductor substrate 101 is provided on the periphery of the mounting table 603, for example. ing.
- the clamp ring member 511 holds the peripheral portion of the semiconductor substrate 101 and fixes it to the mounting table 633 side.
- the clamp ring member 511 is connected to the support member 506 via a connecting rod 5122, and has a structure that moves up and down integrally with the lifter pin 505.
- riff Tapin 5 0 5 and the connecting rod 5 1 2 is formed by a A 1 2 0 3 is a ceramic member.
- the partition wall 5 13 on the outer peripheral side of the mounting table 6 0 3 is purged by an inert gas supplied from a gas nozzle 5 20 connected to an inert gas supply means (not shown) inside the partition wall 5 13.
- An inert gas purge chamber 5 15 is defined. This prevents an unnecessary film from adhering to the side surface or the back surface of the substrate to be processed, the back surface of the mounting table 603, or the transmission window 606.
- the upper end of the partition wall 5 13 is bent, for example, in an L-shape in the horizontal direction to form a bent portion 5 14.
- the upper surface of the bent portion 5 1 4 is substantially in the same plane as the upper surface of the mounting table 6 03, and the connecting rod 5 1 2 is provided in a gap separated from the outer circumference of the mounting table 6 3 by a small distance. Has been communicated.
- a plurality of contact protrusions 5 16 arranged at substantially equal intervals along the circumferential direction are formed on the lower surface on the inner side of the clamp ring member 5 11 1, and the semiconductor substrate 101 is formed. At the time of clamping, the lower end surface of the contact protrusion 5 16 contacts the upper surface of the peripheral portion of the semiconductor substrate 101 and presses it.
- the inert gas in the inert gas purge chamber 5 15 is filled with the first gas purge gap 5 17 formed between the plurality of contact projections 5 16, the clamp ring member 5 11 1 and the bending section 5.
- the gas flows out from the second gas purge gap 518 formed between the insides of the processing vessel 501.
- a plurality of exhaust ports 5 25 communicating with the exhaust passages 5 26 are provided at the periphery of the bottom of the processing vessel 501, and the exhaust passages 5 26 are provided with a valve APC 560 having a variable conductance. , Not shown, is connected to a vacuum pump.
- the processing container 501 can adjust the pressure inside the processing container 501 to a desired pressure by changing the conductance of the APC 560 at that time by changing the conductance of the APC 560.
- a supply means for introducing a source gas for film formation and a tallying gas into the processing vessel 501 is provided on the ceiling of the processing vessel 501 facing the mounting table 603, a supply means for introducing a source gas for film formation and a tallying gas into the processing vessel 501 is provided. Head section 528 is provided.
- the shower head portion 528 has a head body 529 formed into a circular box shape by, for example, aluminum, and a gas inlet 530 is provided at an upper portion of the head body 529. Is provided.
- a gas source such as WF 6 , SiH 4 , or H 2 , which is necessary for the W film deposition process, can be controlled in flow rate through the deposition gas passage 551 through the gas inlet port 530. It is connected.
- a number of gas injection holes 531 for discharging the gas supplied into the head body 529 to the processing space in the processing vessel 501 are provided below the head body 529. It is arranged on substantially the entire lower surface of the head body, and has a structure in which gas is released to the entire surface of the semiconductor substrate 101.
- a diffusion plate 533 having a large number of gas dispersion holes 532 is provided in the head body 529 so that the gas can be uniformly distributed on the semiconductor substrate 101. It can be supplied.
- cartridge heaters 534 and 535 are provided as temperature control means in the side walls of the processing vessel 501 and the side walls of the shower head section 528, respectively. The structure is such that the part in contact with is maintained at a predetermined temperature.
- a film forming process for forming a W film on the semiconductor substrate 101 is performed in the following manner.
- the gate valve 527 is opened, the semiconductor substrate 101 is loaded into the processing container 501 by a not-shown rail transfer arm, and the semiconductor substrate 101 is lifted by lifting the lifter pins 505 in advance. Transfer to lifter pin 505 side.
- the lifter pin 505 is lowered by lowering the push-up bar 507, the semiconductor substrate 101 is placed on the mounting table 603, and the semiconductor substrate is further lowered by further lowering the push-up bar 507.
- the periphery of 101 is pressed and fixed by its own weight of the clamp ring member 511.
- the mounting table 603 is previously heated to a predetermined temperature by a heating lamp 608, and the semiconductor substrate 101 is quickly heated and maintained at a predetermined process temperature.
- WF 6 , SiH 4 , and H 2 which are source gases necessary for film formation, are introduced from a shower head portion, and are placed on a semiconductor substrate 101 mounted on a mounting table 63. A W film is formed.
- the W film When a W film is formed on the semiconductor substrate 101 in the substrate processing container 600, the W film also deposits on portions other than the semiconductor substrate 101. For example, a W film having substantially the same thickness as the semiconductor 101 is formed on the clamp ring member 511. Therefore, for example, the cleaning according to the present invention is performed to remove the W film deposited in the processing container 501 such as the clamp member 511.
- the cleaning according to the present invention is performed by using a remote plasma generation unit 100 mounted on the shutter head unit 528 to which the cleaning gas passage 550 is connected.
- FIG. 2 shows a configuration of a remote plasma generator 100 used in the substrate processing apparatus 600 of FIG.
- a typical remote plasma generator 100 has a gas circulation passage 100a, a gas inlet 100b communicating with the gas circulation passage 100a, and a gas outlet 100c formed therein.
- Fluororesin coating 100d is applied to the inner surfaces of gas circulation passage 100a, gas inlet 100b, and gas outlet 100c to supply high-frequency power with a frequency of, for example, 400 kHz to the coil wound around ferrite core 100B.
- plasma 100C is formed in gas circulation passage 100a.
- the plasma generation method according to the present invention is not limited to the high-frequency power of the above-described frequency, but can use a remote plasma generation source that performs plasma excitation in a high-frequency to microwave range of 400 kHz to 3 GHz. It is.
- NF 3 As a cleaning gas, for example, NF 3 is introduced from 100 b and the plasma 100 C is excited, fluorine radicals are mainly contained in the gas circulation passage 100 a as reaction species that may contribute to cleaning. Fluorine ions are formed. Fluorine ions disappear when circulating in the circulation passage 100a, and fluorine radicals F * are mainly released from the gas outlet 100c.
- F * Fluorine radicals
- FIG. 2 by providing an ion filter 100e grounded to the gas outlet 100c, charged particles including fluorine ions are removed, and only the fluorine radicals are supplied to the processing vessel 501. Further, even when the ion filter 100e is not grounded, the structure of the ion filter 100e functions as a diffusion plate, so that charged particles including fluorine ions can be sufficiently removed.
- the reactive species mainly contributing to the cleaning of fluorine radicals is supplied from the remote plasma generation unit 100 to the substrate processing container 501 via the shower head 528.
- the substrate processing apparatus 60 In the following, a cleaning method for cleaning the deposits deposited in the substrate processing container 501 will be described.
- the W film deposited in the substrate processing container is removed by performing the following cleaning.
- Ar 1000 sccm and NF 3 10 sccm are introduced into the remote plasma generation unit 100 from the cleaning gas introduction unit 550.
- Ar and NF 3 is supplied from the remote plasma generation unit to the processing vessel 501 via the shower head unit 528.
- the supplied Ar and NF 3 are exhausted from the exhaust port 525 through the exhaust passage 526.At this time, the pressure in the processing vessel 501 is adjusted to 600 Pa (4.5 To rr) by the APC 560, and The plasma is excited in the plasma generator.
- the flow rate of the gas for example, A r gas 3000 sc cm
- the pressure in the processing vessel 501 by also APC 560 is adjusted to 5.
- etching of the W film deposited inside the processing container 501 is started to start the cleaning process.
- the approximately 2.5 ⁇ m W film deposited on the clamp ring member 511 in the processing container 501 can be completely removed by performing the cleaning process for 5 minutes. did it.
- the reactive species that contributes to cleaning is mainly F 2 in the present invention. This is because the pressure inside the processing vessel 501 is 5.33 kPa (4 OTo rr), which is higher than that of the conventional method, and the frequency of collisions between F radicals generated in the remote plasma generator 100 increases. This is because F radicals repeatedly collide and most of them recombine with F 2 .
- F 2 in which F radicals are recombined becomes dominant and mainly contributes to the etching of the W film.
- a member made of quartz can be used. This is because it is difficult to use a quartz member with a conventional cleaning method, and thus has a cost reduction effect compared to a case where an expensive member such as a sapphire must be used.
- a ceramic member sintered at normal pressure is used.
- a mounting table 60 3 made of sintered A 1 N, a clamp ring member 5 11, is relates lifter pins 5 0 5 and the connecting rod 5 1 2 consisting of sintered a 1 2 0 3, the amount is small castings to be etched by F radicals as compared to quartz as described above, it is etched by F radicals
- the compound of A1 stays inside the processing vessel 501 and becomes a part-take / re, or becomes a contaminant, thereby deteriorating the quality of a thin film formed in the processing vessel 501.
- films formed in the substrate processing apparatus i.e. subject to film Tarinin grayed according to the invention is not limited to the W film, for example, WN, T a, T a N, T a 2 ⁇ 5, R e, R h, I r, the same effect as this embodiment can be obtained with a film, such as I r 2 0 3, S i , S i 0 2, S i N, T i, T i N, u, R uo 2 .
- the substrate processing apparatus 600 can be changed to a substrate processing apparatus 600A shown in FIG. 3 below.
- FIG. 3 shows a substrate processing apparatus 600A which is a modification of the substrate processing apparatus 600 shown in FIG.
- the same reference numerals are given to the parts described above, and the description is omitted. Abbreviate.
- a cleaning gas introduction path 55 2 communicating with the processing vessel 501 is provided on the side of the processing vessel 501, and a cleaning gas introduction path 55 is provided. 2 is provided with a remote plasma generator 100.
- the process vessel 5 It is possible to reduce the amount of A1 compound contamination in 01.
- FIGS. 4 and 5 show that the substrate on which the thin film was formed was placed on the mounting table 603 of the substrate processing apparatus 600, and the thickness at which the thin film was etched by the above-described cleaning step was measured. It is a result of measuring and measuring the speed at which the thin film is etched by cleaning.
- FIG. 4 is a diagram showing the etching rate at which the thermal oxide film (S i 0 2 ) formed on the wafer is etched
- FIG. 5 is a diagram showing the etching rate at which the thermal oxide film (S i 0 2 ) formed on the wafer is etched. 5 shows a change in the etching rate when the pressure in the substrate processing container 501 is changed.
- the NF 3 flow rate is 230 sccm
- the Ar flow rate is 300 sccm.
- the remote plasma F radicals that contribute reactive species for cleaning to be fed as reduces the prevalence with increasing pressure, approximately 1333Pa (l OTo rr). In the above pressure region, there are many contact monitor F 2 become.
- the etching rate of the W film hardly changes even when the pressure increases. This is because even if the pressure rises and the reactive species contributing to cleaning changes from F radicals to F 2, the W film is etched by F 2 in the same way as F radicals. It is shown to be maintained.
- the etching rate against the pressure in the case of the etching rate of the thermal oxide film in FIG. 5 sharply drops in the region where the pressure is 1333 Pa (10 Torr) or more. This along with the increase in pressure, as described above, a phenomenon that becomes F 2 proceeds recombination of F the radical Le, the etching rate for the thermal oxide film F 2 occurring due to the low.
- FIG. 6 shows the results of FIGS. 4 and 5 as a ratio of the etching rate of the thermal oxide film to the etching rate of the W film.
- the cleaning step of this embodiment by setting the pressure in the substrate processing chamber approximately 13 33 P a (1 OTo rr ) above, so please low the etching rate of S i 0 2, with S i 0 2
- the formed quartz member can be installed in the substrate processing container 501 and used.
- Table 1 shows the results of an investigation of A1 residues in the substrate processing container after the cleaning step of the first example.
- Table 1 shows that the silicon wafer was conveyed to the mounting table 603 of the substrate processing container 501 after performing the sagging step (5 minutes) in the first embodiment 20 times, and the front and back surfaces of the conveyed wafer were The results of investigation of the contamination status by the attached A1 by ICP mass spectrometry are shown.
- the unit in this case is at omsZcm 2 .
- A1 on the front surface of the wafer before cleaning is 1. IXion, and the backside of the wafer is 1.5 X 1 Oil, but cleaning by the conventional method (667 Pa, 5 Torr). After that, the amount of A1 increased greatly, with the wafer front surface being 2.0 X 1013 and the wafer back surface being 7.0 X 10 is. It is considered that this is because A 1 N of the mounting table 603 or the clamp ring member 511 is etched by fluorine radicals during tallying, and an aluminum compound remains in the processing container 501.
- the wafer surface is 1.1 ⁇ 10 ⁇
- the wafer back surface is 1.6 X 1 On
- example embodiment consists of a sintered A 1 N table 603 and the clamp ring material 511 and sintering A 1 2 0 3 lifter pin 505 This is because the connecting rod 512 is hardly etched, and no metal contaminant is generated in the substrate processing container 501 even after performing the drilling.
- FIGS. 7 to 10 show another embodiment of the present invention.
- FIG. 7 shows a configuration of a substrate processing apparatus 500 to which the cleaning of the present invention can be applied.
- a mounting table 503 which is supported by a support column 502 and in which, for example, a resistance heater 504 is embedded as a heating means, is installed.
- the mounting table 503 is made of, for example, an aluminum alloy such as aluminum nitride, and the semiconductor wafer 101 is mounted on the mounting table 503.
- the substrate processing apparatus 500 does not use quartz parts such as the transmission window 606.
- the clamping ring member 5 1 also without being lifter pins 5 0 5 and the connecting rod 5 1 2 consisting of sintered A 1 2 0 3 is etched
- the ceramic member is not A 1 N and A 1 2 0 3 two Period constant, the same effect for the other ceramic materials
- the substrate processing apparatus 500 may be modified as shown in FIG. 8 below as a substrate processing apparatus 500A.
- FIG. 8 shows a substrate processing apparatus 500A which is a modification of the substrate processing apparatus 500 shown in FIG.
- the same reference numerals are given to the parts described above, and the description is omitted. '
- a cleaning gas introduction passage '55 2 communicating with the processing vessel 501 is provided on the side of the processing vessel 501, and the cleaning is performed.
- a remote plasma generator 100 is provided in the gas introduction path 552.
- talling can be performed in the same manner as in the first embodiment. .
- FIG. 9 shows the configuration of a substrate processing apparatus 300 as a seventh embodiment.
- the substrate processing apparatus 300 has a processing container 301, and a mounting table 3 1 made of A 1 N holding a semiconductor substrate 101 is provided at the bottom of the processing container 301.
- the mounting table 3 1 1 is supported by a plurality of mounting table supports 3 1 4 which are substantially cylindrical and are arranged equidistantly from the center of the mounting table 3 1 1.
- Inside 11 is installed a heater 3 12 connected to Kasumihara 3 15.
- a guide ring 313 made of sintered A 1 N for holding the semiconductor substrate 101 at the center of the mounting table 311 is mounted on the mounting table 311.
- a shower head section 302 to which a gas introduction section 303 is connected is provided above the processing vessel 301.
- a remote plasma generator 100 connected to a Tarry-Jung gas supply source 308 via a cleaning gas inlet passage 307 is provided above the gas inlet 303, and a gas inlet is further provided.
- the section 303 is connected to a film formation gas introduction path 306.
- Semiconductor substrate When a film is formed on L ⁇ 1, the raw material A gas and the raw material B gas supplied to the shower head 302 from the raw material A supply source 309 and the raw material B supply source 310 are supplied to the inside of the shower head. After being sufficiently diffused and mixed in the space 302a, the gas is supplied from the gas supply hole 302b to the processing space 301a formed in the processing container 301, and a desired thin film is formed on the semiconductor substrate 101.
- a cleaning gas supply source when cleaning is performed, a cleaning gas supply source, a remote plasma generation source from 308, and a supply line to 100, for example, carrier gas such as NF 3 or NF 3 and Ar generate remote plasma. Reactive species required for cleaning are generated by the plasma excitation in the section 100 and supplied to the processing space 301a from the gas supply holes 302 of the shower head section 302.
- the processing space 301a is evacuated by a vacuum pump (not shown) through an exhaust passage 316 from an exhaust port 323 provided at the bottom of the processing container 301. At this time, the processing space 301a can be adjusted to a desired pressure by the APC 317 provided in the air passage 316.
- the pressure region of 1333 Pa (l OTo rr) or more according to the present invention for example, 53.3 kPa (4 OTo At rr), tally aging in the processing vessel 301 can be performed.
- the exhaust port 323 of the processing container 301 is located at the center of the processing container 301, the gas introduced into the processing space 301a is uniformly exhausted around the mounting table 311. Even when the cleaning is performed, uniform cleaning can be performed in the processing container 301 without leaving a residue at a specific location.
- quartz processing vessel of the substrate processing apparatus by the cleaning method of the present invention Ru can der to reduce the damage of members such as A 1 N, A 1 2 0 3.
- FIG. 10 shows the configuration of a substrate processing apparatus 300A as an eighth embodiment.
- a shower head section 318 having a gas introduction section A 319 and a gas introduction section B 320 is provided above the processing vessel 301.
- a remote plasma generation source 100 to which a clean Jung gas supply source 308 is connected is provided on the gas introduction unit A319.
- the gas introduction section A 319 is connected to the source A supply source 309 via the source A gas supply path 321, and the gas introduction section B 320 is connected to the source B supply source 310 via the source B gas supply path 322. I have.
- the raw material A gas supplied from the raw material A supply source is sufficiently diffused in the raw material A gas diffusion chamber 318 e formed inside the shower head section 318, and then is supplied through the raw material A gas transport path 318 f.
- the raw material A is supplied to the processing space 301a substantially uniformly from a plurality of gas supply holes 318g communicating with the processing space 301a from the diffusion chamber 318e.
- the raw material B gas supplied from the raw material B supply source 310 is supplied from the raw material B gas introduction path 318 a formed inside the shower head section 318 to the raw material B diffusion chamber via the raw material B gas transport path 318 b. After sufficiently diffusing at 318c, the raw material B gas is supplied from the gas diffusion chamber 318c to the processing space 301a through a plurality of gas supply holes 318d communicating with the processing space 301a.
- the raw material A and the raw material B used for film formation do not mix inside the shower head section 318 but mix in the processing space 301 a.
- a mixed type gas can be introduced, and a desired film formation process can be performed by performing a gas mixture using a source-gas A and a source B-gas.
- a pressure region of 1333 Pa (10 Torr) or more according to the present invention for example, 53.3 kPa (40 T orr In)
- Ru chestnut one Jung method such as quartz in the processing vessel of the substrate processing apparatus by, it can der to reduce the damage of members such as A 1 N, A 1 2 0 3 of the present invention.
- the substrate processing apparatus 600, 600, 500, 500, 300, and 300 is used as a cluster tool apparatus 70, which can perform continuous processing. It may be applied to 0.
- the cluster tool device 700 shown in FIG. 11 has, at the center thereof, a common transfer chamber 700 for transferring, for example, a semiconductor substrate 101 formed in an octagonal container shape of, for example, aluminum.
- a common transfer chamber 700 for transferring, for example, a semiconductor substrate 101 formed in an octagonal container shape of, for example, aluminum.
- the 709 force is connected via gate valves G1 to G8 which can be opened and closed, respectively.
- the minute removal chamber 704 is a processing chamber for heating the semiconductor substrate to remove moisture and the like adhering to the surface, if necessary.
- the cooling processing chamber is a processing chamber for cooling the semiconductor substrate to a temperature at which it can be handled, if necessary.
- a cassette 711 which can store 25 substrates, can be stored.
- Gate doors GD1 and GD2 for loading and unloading are respectively provided in the cassette chambers 72 and 703 so as to be openable and closable, and a cassette table (not shown) is provided so as to be able to move up and down.
- the cassette chambers 720 and 703 can be supplied with an inert gas such as N 2 gas and evacuated.
- the common transfer chamber 700 there are a rotary position determining mechanism 721, which positions the board taken in, and a multi-joint arm mechanism, which can be bent, stretched and rotated while holding the board.
- a transfer arm 722 is arranged, and the substrate is loaded and unloaded between processing chambers by bending and rotating the transfer arm.
- the common transfer chamber 700 is also capable of supplying an inert gas, for example, N 2 gas, and being evacuated.
- An airtight box 730 is provided around each processing chamber so as to surround the individual processing chambers, so that the processing gas does not leak to the surroundings. Is provided with an exhaust duct (not shown) to exhaust the inside of the hermetic bottus 70.
- a third processing chamber 707 is provided with a substrate processing apparatus 6. It is possible to apply any of 00, 600 OA, 500, 500 OA, 300 and 300 A. In that case, as necessary, the first processing chamber 705, the second processing chamber 706, and the fourth processing chamber 708, the film forming processing performed in the third processing chamber Pre-processing or post-processing. Note that the processing steps are not limited to those described above, and the application of the substrate processing apparatus 600, 60, OA, 500, 500, 300, and 30 OA may be applied as necessary. Any of the first to fourth substrate processing chambers can be changed as necessary, and the combination of pre-processing and post-processing can be arbitrarily changed.
- the first force setting chamber 702 is opened. Seal and vacuum. Thereafter, the gate valve G1 is opened, the transfer arm 722 in the common transfer chamber 701, which has been evacuated in advance, is extended, and one unprocessed semiconductor substrate 101 is taken out.
- the semiconductor substrate 101 is positioned by the rotary positioning mechanism 7 2 1.
- the semiconductor substrate 101 after positioning is transported again to the moisture removal chamber 704 via the gate valve G3 which is open using the transfer arm 722, and the semiconductor substrate 101 is removed here. By heating, moisture or the like adhering to the surface of the semiconductor substrate 101 is vaporized and removed. This water removal treatment may be performed as necessary, and if not necessary, the process may be shifted to the next step without performing this step.
- the semiconductor substrate 101 is transferred to the third substrate processing chamber 707 via the gate valve G6, and is transferred to the third substrate processing chamber 707 to perform a desired film forming process.
- a desired film forming process is performed in the third processing chamber.
- the gate valve G6 is opened, the semiconductor substrate 101 is taken out using the transfer arm 722, and introduced into the cooling chamber 709 via the gate valve G8 opened. Here, it is cooled to a predetermined handling temperature, and The processed semiconductor substrate 101 is accommodated in the cassette 71 1 in the second cassette room 73 3 via the gout pulp G 2.
- the pretreatment of the film forming process in the third processing chamber 707 may be performed, if necessary, in the first processing chamber 705, the second processing chamber 706, and the fourth processing chamber 706. It can be performed in any of the processing rooms 708.
- the post-treatment of the film forming process in the third processing chamber 707 may be performed in the first processing chamber 705, the second processing chamber 706, and the fourth processing chamber 708. Can be done with either
- the unprocessed semiconductor substrate can be sequentially and continuously processed by the cluster tool device 700.
- the method of performing the cleaning according to the present invention in the third processing chamber 707 may be performed, for example, after the film forming process in the third processing chamber 707 has been completed 25 times, that is, the semiconductor substrate is removed.
- the cleaning according to the present invention can be performed, for example, once in the third processing chamber 707, that is, each time one semiconductor substrate is processed, and further, for example, in the third processing chamber 707.
- the number of film forming processes before the cleaning is performed can be freely changed according to the thickness of the film formed in the film forming process, the conditions, and the like.
- quartz processing vessel board processor by the cleaning method of the present invention can reduce the damage of members such as A 1 N, A 1 2 0 3 is there.
- the target film of the tallying according to the present invention is described in the present embodiment not only for the W film as described above, but also for other metals, metal nitrides, metal oxides, silicon and silicon compounds. It has the same effect as the case that, specifically, WN, T a, T a N, T a 2 0 5, R e, R h, I r, I r 2 0 3) S i, S i 0 2, S i N, T i , T i N, R u, it is possible to apply the cleaning of such R u 0 2, to obtain the same effect as that shown in the examples described above be able to.
- a plasma excitation method for generating radicals contributing to cleaning Is not limited to the method described in the present embodiment.
- the frequency of the high-frequency power is used in the range of 400 kHz to 3 GHz, the frequency is similar to that described in the present embodiment.
- An effect can be obtained.
- the cleaning method according to the present invention can be used in a substrate processing apparatus that forms a film on a substrate to be processed, such as a semiconductor substrate, for example. Suitable for removing objects.
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Abstract
Description
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CN2003801044401A CN1717791B (zh) | 2002-11-27 | 2003-11-14 | 基板处理容器的清洗方法 |
US10/536,322 US7456109B2 (en) | 2002-11-27 | 2003-11-14 | Method for cleaning substrate processing chamber |
AU2003280802A AU2003280802A1 (en) | 2002-11-27 | 2003-11-14 | Method for cleaning substrate processing chamber |
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JP2002-344457 | 2002-11-27 | ||
JP2002344457A JP2004179426A (ja) | 2002-11-27 | 2002-11-27 | 基板処理装置のクリーニング方法 |
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JP (1) | JP2004179426A (ja) |
KR (1) | KR100697512B1 (ja) |
CN (1) | CN1717791B (ja) |
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CN111081524B (zh) * | 2019-12-31 | 2022-02-22 | 江苏鲁汶仪器有限公司 | 一种可旋转的法拉第清洗装置及等离子体处理系统 |
JP2023071064A (ja) | 2021-11-10 | 2023-05-22 | 東京エレクトロン株式会社 | プラズマ源及びプラズマ処理装置 |
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JP2002184765A (ja) * | 2000-12-18 | 2002-06-28 | Central Glass Co Ltd | クリーニングガス |
WO2002078073A1 (fr) * | 2001-03-22 | 2002-10-03 | Research Institute Of Innovative Technology For The Earth | Procede de nettoyage d'un dispositif cvd et dispositif nettoyant afferent |
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US5843239A (en) * | 1997-03-03 | 1998-12-01 | Applied Materials, Inc. | Two-step process for cleaning a substrate processing chamber |
US6374831B1 (en) * | 1999-02-04 | 2002-04-23 | Applied Materials, Inc. | Accelerated plasma clean |
JP2004179426A (ja) | 2002-11-27 | 2004-06-24 | Tokyo Electron Ltd | 基板処理装置のクリーニング方法 |
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2003
- 2003-11-14 KR KR1020057009559A patent/KR100697512B1/ko not_active IP Right Cessation
- 2003-11-14 US US10/536,322 patent/US7456109B2/en not_active Expired - Fee Related
- 2003-11-14 CN CN2003801044401A patent/CN1717791B/zh not_active Expired - Fee Related
- 2003-11-14 WO PCT/JP2003/014519 patent/WO2004049421A1/ja active Application Filing
- 2003-11-14 AU AU2003280802A patent/AU2003280802A1/en not_active Abandoned
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JP2002184765A (ja) * | 2000-12-18 | 2002-06-28 | Central Glass Co Ltd | クリーニングガス |
WO2002078073A1 (fr) * | 2001-03-22 | 2002-10-03 | Research Institute Of Innovative Technology For The Earth | Procede de nettoyage d'un dispositif cvd et dispositif nettoyant afferent |
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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 |
CN107034446A (zh) * | 2017-04-28 | 2017-08-11 | 昆山国显光电有限公司 | 一种具备清洁功能的pecvd设备及清洁方法 |
Also Published As
Publication number | Publication date |
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US7456109B2 (en) | 2008-11-25 |
AU2003280802A1 (en) | 2004-06-18 |
CN1717791A (zh) | 2006-01-04 |
KR100697512B1 (ko) | 2007-03-20 |
US20060124151A1 (en) | 2006-06-15 |
JP2004179426A (ja) | 2004-06-24 |
CN1717791B (zh) | 2011-07-20 |
KR20050087807A (ko) | 2005-08-31 |
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