WO2011115155A1 - 基板洗浄装置及び基板洗浄方法 - Google Patents
基板洗浄装置及び基板洗浄方法 Download PDFInfo
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- WO2011115155A1 WO2011115155A1 PCT/JP2011/056167 JP2011056167W WO2011115155A1 WO 2011115155 A1 WO2011115155 A1 WO 2011115155A1 JP 2011056167 W JP2011056167 W JP 2011056167W WO 2011115155 A1 WO2011115155 A1 WO 2011115155A1
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- substrate
- cleaning
- cluster
- cleaning agent
- cleaned
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- 239000000758 substrate Substances 0.000 title claims abstract description 163
- 238000004140 cleaning Methods 0.000 title claims abstract description 117
- 238000000034 method Methods 0.000 title claims description 40
- 239000012459 cleaning agent Substances 0.000 claims abstract description 140
- 238000005507 spraying Methods 0.000 claims abstract description 29
- 239000000126 substance Substances 0.000 claims abstract description 8
- 238000002347 injection Methods 0.000 claims description 34
- 239000007924 injection Substances 0.000 claims description 34
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 29
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 24
- 239000012159 carrier gas Substances 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 claims description 12
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- 238000003860 storage Methods 0.000 claims description 9
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- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 claims description 3
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- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 claims description 2
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Images
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
- H01L21/02041—Cleaning
- H01L21/02043—Cleaning before device manufacture, i.e. Begin-Of-Line process
- H01L21/02052—Wet cleaning only
-
- 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
-
- 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
- H01L21/02041—Cleaning
- H01L21/02057—Cleaning during device manufacture
- H01L21/0206—Cleaning during device manufacture during, before or after processing of insulating layers
-
- 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
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical 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
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67028—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like
- H01L21/6704—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing
- H01L21/67051—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly spraying means, e.g. nozzles
Definitions
- the present invention relates to a substrate cleaning apparatus and a substrate cleaning method for cleaning a substrate to which an object to be cleaned is attached.
- Patent Document 1 discloses a substrate cleaning apparatus including a rotation mechanism that rotates a wafer, a line-shaped discharge nozzle that discharges a cleaning liquid onto the wafer in a line, and a moving mechanism that moves the line-shaped discharge nozzle along the wafer. It is disclosed. According to the substrate cleaning apparatus according to Patent Document 1, even a large wafer can be cleaned with cleaning water with extremely high throughput and cleaning capability.
- a wet cleaning solution that uses diluted cleaning agent and compensates for the reduction in cleaning power due to the dilution of cleaning agent by physical auxiliary means Cleaning methods are being considered.
- the physical auxiliary means include ultrasonic cleaning and two-fluid jet cleaning. In the two-fluid jet cleaning, pure water and high-pressure nitrogen gas are mixed, fine droplets are ejected from a nozzle, and dirt is removed using a shock wave generated when the microdroplets collide with the wafer surface. It is.
- the conventional wet cleaning method has the following technical problems as the device structure formed on the wafer is miniaturized and complicated.
- First problem When physical auxiliary means such as ultrasonic waves and two-fluid spray are used, the miniaturized device structure may be physically damaged.
- Second problem The miniaturized device structure may collapse due to the surface tension of water.
- Third problem When the substrate is dried after wet cleaning, a watermark is generated on the surface of the substrate, resulting in deterioration and failure of device performance.
- Fourth problem A water-soluble material, such as La, formed on a substrate may be damaged in the cleaning process.
- Fifth problem Substrate materials other than the object to be cleaned formed on the substrate may be lost by cleaning.
- Sixth problem The device structure may be destroyed by discharge generated between the water charged in the cleaning process and the substrate.
- the present invention has been made in view of such circumstances, and the object thereof is removed by injecting a cluster formed by a plurality of different cleaning agent molecules separately onto the substrate and injecting the cluster.
- a cluster formed by a plurality of different cleaning agent molecules separately onto the substrate and injecting the cluster.
- a substrate cleaning apparatus is a substrate cleaning apparatus for cleaning a substrate to which an object to be cleaned is attached.
- Cluster injection means for injecting a cluster formed by a plurality of cleaning agent molecules onto the substrate; and
- a suction means for sucking an object to be cleaned removed by spraying a cluster, and a means for relatively moving the substrate and the cluster spray means along the surface of the substrate to which the object to be cleaned is attached.
- the substrate cleaning apparatus includes a container that accommodates the substrate, a vacuum pump that depressurizes the interior of the container, and a cleaning agent container that stores a cleaning agent.
- the substrate cleaning apparatus is characterized in that the suction means includes a plurality of suction portions, and the plurality of suction portions are arranged in parallel to the nozzles.
- a substrate cleaning apparatus is a substrate cleaning apparatus for cleaning a substrate to which an object to be cleaned is attached.
- Cluster injection means for injecting a plurality of clusters of cleaning agent molecules onto the substrate, and the cleaning agent molecules
- means for moving means for moving.
- the substrate cleaning apparatus includes a container that accommodates the substrate, a vacuum pump that depressurizes the interior of the container, and a cleaning agent container that stores a cleaning agent.
- the substrate cleaning apparatus according to the present invention is characterized in that a cross section of the nozzle nozzle is linear.
- the substrate cleaning apparatus includes a support member that supports the plurality of nozzles such that a spraying direction of the cleaning agent is a non-normal direction of the substrate.
- the plurality of cleaning molecules are substances selected from the group consisting of an organic solvent, hydrogen fluoride, hydrochloric acid, ozone, ammonia hydrogen peroxide, water, isopropyl alcohol, nitrogen, and argon. It is a molecule.
- the substrate cleaning method according to the present invention is a substrate cleaning method for cleaning a substrate to which an object to be cleaned is attached.
- the substrate cleaning method according to the present invention is a substrate cleaning method for cleaning a substrate to which an object to be cleaned is attached.
- the substrate is scanned while the cluster formed by a plurality of cleaning agent molecules is sprayed onto the substrate by the cluster spraying means.
- the cluster of cleaning agents reaches the surface of the substrate, it is thought that the cleaning agent molecules spread on the surface of the substrate in a high density state close to that of the liquid, and the liquid phase cleaning agent is applied as if it acts on the object to be cleaned. It is speculated that it is possible to remove the washed product. Since the object to be cleaned removed by the cluster injection is sucked by the suction means, it is possible to suppress the object to be cleaned from reattaching to the substrate.
- the cluster of cleaning agent molecules sprayed onto the substrate are removed by the cluster of cleaning agent molecules sprayed onto the substrate as compared with the cryogenic aerosol irradiation method. Furthermore, since it is not cleaning using water, it is possible to avoid the technical problems of wet cleaning such as microroughness, watermark, loss of substrate material, and destruction of device structure. Furthermore, when an ion beam is irradiated, the substrate may be damaged by ions and electrons. However, when a cluster of cleaning agents is sprayed onto the substrate, the organic solvent molecules only spread along the substrate surface, There is no damage.
- the inside of the container is depressurized by a vacuum pump.
- the plurality of nozzles constituting the cluster injection means are arranged in parallel, and each nozzle injects the cleaning agent supplied from the cleaning agent storage portion through the supply path into the storage body.
- the temperature of each cleaning agent sprayed from the nozzle is lowered and clustered by adiabatic expansion.
- the substrate is scanned while ejecting a cluster formed by a plurality of cleaning agent molecules onto the substrate by the cluster ejecting means.
- the operation related to the cluster injection of the cleaning agent is as described above. Since the object to be cleaned that has been removed by the cluster injection is transported to the outside by the transport gas sent to the substrate, the object to be cleaned can be prevented from reattaching to the substrate.
- the inside of the container is depressurized by a vacuum pump.
- the plurality of nozzles constituting the cluster injection means are arranged in parallel, and each nozzle injects the cleaning agent supplied from the cleaning agent storage portion through the supply path into the storage body.
- the temperature of each cleaning agent sprayed from the nozzle is lowered and clustered by adiabatic expansion.
- the substrate can be efficiently cleaned.
- the nozzle is supported by the support member so that the spraying direction of the cleaning agent is a non-normal direction of the substrate. Therefore, by moving the nozzle to the outside of the substrate while spraying the cluster, the object to be cleaned removed from the substrate can be blown away by spraying the cluster.
- various types of contaminants are removed from the substrate as compared with the cryogenic aerosol irradiation method while avoiding the technical problems of wet cleaning such as microroughness, watermark, substrate material loss, and device structure destruction. can do.
- FIG. 2 is a sectional view taken along line II-II in FIG.
- FIG. 3 is a side cross-sectional view schematically illustrating a configuration example of a cluster ejection head. It is the chart which showed an example of the 1st thru / or the 3rd cleaning agent. It is explanatory drawing which showed the difference with the cluster injection with respect to a board
- FIG. 10 is a side cross-sectional view schematically showing a configuration example of a substrate cleaning apparatus according to Modification 1.
- FIG. 9 is a side cross-sectional view schematically illustrating a configuration example of a cluster ejection head according to Modification Example 1.
- FIG. 10 is a side sectional view schematically showing one configuration example of a substrate cleaning apparatus in Modification 2.
- a substrate cleaning apparatus is an apparatus that cleans a substrate to which an object to be cleaned is attached.
- the substrate cleaning apparatus avoids the technical problems of wet cleaning and is more diverse than a cryogenic aerosol irradiation method. This makes it possible to remove various contaminants from the substrate.
- FIG. 1 is a side sectional view schematically showing a configuration example of a substrate cleaning apparatus according to an embodiment of the present invention
- FIG. 2 is a sectional view taken along line II-II in FIG. 1
- FIG. 3 is a side cross-sectional view schematically showing one configuration example of FIG.
- the substrate cleaning apparatus according to the present embodiment includes a processing chamber (container) 1 having a hollow and substantially rectangular parallelepiped shape that accommodates a wafer W.
- the processing chamber 1 is provided with a loading / unloading port 11 for loading and unloading the wafer W into the processing space in the processing chamber 1. By closing the loading / unloading port 11 with the door body 12, the processing space can be sealed.
- a wafer support 2 that holds the wafer W substantially horizontally is provided.
- the wafer support 2 includes a table unit 21 on which the wafer W is placed. As shown in FIG. 2, the table portion 21 is provided with three holding members 22 at the top, and holds the wafer W substantially horizontally by bringing the holding members 22 into contact with the three peripheral portions of the wafer W, respectively. It is configured.
- the table portion 21 includes a shaft portion 23 that protrudes downward from its substantially central portion, and the lower end of the shaft portion 23 is fixed to the processing chamber 1.
- a cluster ejection head 3 that ejects a cluster formed by a plurality of different cleaning agent molecules separately onto the wafer W and sucks an object to be cleaned that has been removed by cluster ejection is disposed above the processing chamber 1.
- the cluster ejection head 3 has a rod shape whose longitudinal direction is wider than the diameter of the wafer W, and is supplied through first to third cleaning agent supply pipes 31a, 32a, and 33a, which will be described later, as shown in FIG.
- the first to third nozzles 31c, 32c, and 33c for injecting the first to third cleaning agents are provided.
- the first to third nozzles 31 c, 32 c, and 33 c are arranged in parallel in the transfer direction of the cluster ejection head 3.
- the first to third cleaning agents are collectively referred to as “cleaning agents” as appropriate.
- the cross sections of the injection port portions 31e, 32e, and 33e of the first to third nozzles 31c, 32c, and 33c are linear as shown in FIG. 2, and the width of the injection port in the longitudinal direction is equal to or larger than the diameter of the wafer W. .
- the cleaning agent sprayed from the first to third nozzles 31c, 32c, 33c is clustered by adiabatic expansion.
- the cluster ejection head 3 has three first to third suction sections for sucking the objects to be cleaned, which are removed by ejecting the clusters of the cleaning agent molecules from the first to third nozzles 31c, 32c, and 33c.
- 31d, 32d, and 33d are juxtaposed with the first to third nozzles 31c, 32c, and 33c.
- a suction pump 35 is connected to the first to third suction parts 31d, 32d, and 33d via a suction pipe.
- the first to third nozzles 31c, 32c, and 33c constitute cluster ejecting means, and the first to third suction parts 31d, 32d, and 33d are removed by ejecting clusters of cleaning agent molecules.
- a suction means for sucking the cleaning object is configured.
- the first to third nozzles 31c, 32c, 33c are supported by a nozzle arm (support member) 42.
- the nozzle arm 42 is provided above the wafer W supported by the wafer support 2, and supports the nozzle so that the spraying direction of the first to third cleaning agents is a non-normal direction of the wafer W.
- the base end portion of the nozzle arm 42 is supported so as to be movable along a guide rail 41 arranged substantially horizontally.
- a drive mechanism 43 that moves the nozzle arm 42 along the guide rail 41 is also provided.
- the guide rail 41 and the drive mechanism 43 constitute a transfer mechanism that transfers the cluster ejection head 3 supported by the nozzle arm 42 along the surface of the wafer W.
- the nozzle arm 42 By driving the drive mechanism 43, the nozzle arm 42 can move between above the wafer W held on the wafer support 2 and outside the periphery of the wafer W.
- the operation of the drive mechanism 43 is controlled by the control unit 7.
- the guide rail 41 and the drive mechanism 43 correspond to means for relatively moving the substrate and the cluster ejecting means along the surface of the substrate on which the object to be cleaned is attached.
- the first to third cleaning agents connected to the first to third cleaning agent supply units 51, 52, and 53, respectively, which store the first to third cleaning agents, are respectively connected to the first to third nozzles 31c, 32c, and 33c.
- Supply pipes (supply paths) 31a, 32a, 33a are connected.
- the first to third cleaning agent supply pipes 31a, 32a, and 33a supply the first to third cleaning agents in a gas phase state from the first to third cleaning agent supply units 51, 52, and 53 to the processing chamber 1.
- 1st to 3rd opening-and-closing valve 31b, 32b, and 33b are provided in the 1st thru / or 3rd detergent supply pipe 31a, 32a, and 33a, respectively.
- the opening / closing operation of the first to third opening / closing valves 31b, 32b, 33b is controlled by the control unit 7.
- FIG. 4 is a chart showing an example of the first to third cleaning agents.
- the first to third cleaning agents can be appropriately selected according to the type of the object to be cleaned.
- an organic solvent may be used as the first cleaning agent and nitrogen N 2 soot gas may be used as the second cleaning agent.
- an organic solvent may be used as the first and second cleaning agents, and nitrogen N 2 soot gas may be used as the third cleaning agent.
- silicon monoxide SiO water may be used as the first cleaning agent, hydrogen fluoride as the second cleaning agent, and isopropyl alcohol IPA and nitrogen N2 soot gas as the third cleaning agent.
- hydrochloric acid HCl is used as the first cleaning agent
- ozone O3 soot is used as the second cleaning agent
- nitrogen N2 soot gas is used as the third cleaning agent.
- ozone O3 soot may be employed as the first cleaning agent
- nitrogen N2 soot gas may be employed as the second cleaning agent.
- ammonia hydro APM may be used as the first cleaning agent, nitrogen N2 soot gas as the second cleaning agent, or nitrogen N2 soot gas or argon Ar as the first cleaning agent.
- water H2 O is used as the first cleaning agent
- isopropyl alcohol IPA is used as the second cleaning agent
- nitrogen N2 gas is used as the third cleaning agent. good.
- the cleaning agents necessary to remove each object to be cleaned are sequentially clustered, and the cleaning agents common to each object to be cleaned can be selected appropriately. good.
- an organic solvent may be used as the first cleaning agent, ozone O3 as the second cleaning agent, and nitrogen N2 gas as the third cleaning agent.
- an exhaust unit 10 is provided at an appropriate location in the processing chamber 1, and a vacuum pump 6 that depressurizes the inside of the processing chamber 1 to about 10 Pa, for example, is connected to each exhaust unit 10 via a pipe 63. Since clustering of the cleaning agent is realized by adiabatic expansion of the cleaning agent, it is preferable that the vicinity of the cluster jet head 3 is in a reduced pressure state.
- the first exhaust unit 10 may be provided in the vicinity of the cluster ejection head 3, and the second and third exhaust units 10, 10 may be provided below the side wall of the processing chamber 1.
- the vacuum pump 6 includes, for example, a turbo molecular pump 61 (TMP: Turbo : Molecular Pump) and a roughing dry vacuum pump 662 (DP: Dry Pump) provided in the preceding stage. These operations are controlled by the control unit 7.
- FIG. 5 is an explanatory diagram showing the difference between cluster injection to the substrate and ion beam irradiation.
- a simulation showing the behavior of the argon atom and the state of the substrate when the substrate is irradiated or jetted with an ion beam and cluster of argon atoms will be described.
- the ion beam and cluster of a cleaning agent molecule show the same behavior as an argon atom.
- 5A and 5B show the substrate before and after the irradiation and ejection of the ion beam and cluster, and the argon ions and the argon cluster irradiated on the substrate.
- each argon atom constituting the ion beam in which 2000 argon atoms are gathered has an energy of 10 eV.
- FIG. 5B As described above, when high-energy argon atoms collide with the substrate, it can be seen that the substrate is physically damaged as shown in FIG. 5B. Needless to say, damage to the substrate leads to device failure and performance degradation.
- the right diagram in FIG. 5B shows a cluster in which, for example, 20000 argon atoms are gathered.
- the cluster also has an energy of 20 keV, like the ion beam.
- each argon atom constituting an ion beam in which 20000 argon atoms are gathered has an energy of 1 eV.
- FIG. 6 are explanatory views conceptually showing an example of the substrate cleaning method according to the embodiment of the present invention.
- the control unit 7 drives the vacuum pump 6 to depressurize the interior of the processing chamber 1 to about 10 Pa, and controls the operation of the drive mechanism 43, thereby moving the cluster ejection head 3 to one end side of the wafer W (for example, To the left end side in FIG.
- control part 7 supplies the 1st thru
- the control unit 7 drives the suction pump 35 to start suction of the object to be cleaned that has been removed by the cluster injection of the first to third cleaning agents.
- the control unit 7 controls the operation of the drive mechanism 43 to move the cluster ejection head 3 from one end of the wafer W to the other end side (for example, the right end side in FIG. 1) at a predetermined speed.
- the first to third cleaning agents supplied to the first to third nozzles 31c, 32c, and 33c are sprayed toward the wafer W in the processing chamber 1, but the inside of the processing chamber 1 is depressurized by the vacuum pump 6. Therefore, the sprayed first to third cleaning agents are adiabatically expanded, and clusters formed by aggregation of the first to third cleaning agent molecules are generated separately. The generated clusters of the first to third cleaning agents collide with the surface of the wafer W.
- the first object to be cleaned is decomposed by the first cleaning agent as shown in FIG.
- the removed object to be cleaned is blown away toward the first suction part 31d by the first cleaning agent cluster sprayed onto the wafer W, and is sucked into the first suction part 31d.
- the cluster ejection head 3 moves and the cluster of the second cleaning agent is ejected to the portion where the first cleaning agent is ejected as shown in FIG. 8, the second object to be cleaned is decomposed, and the second It is sucked by the suction part 32d.
- the cluster of the third cleaning agent is jetted onto the portion where the cluster jet head 3 moves and the third cleaning agent is cluster-sprayed as shown in FIG. 9, the third object to be cleaned is decomposed, It is sucked by the third suction part 33d.
- various objects to be cleaned can be removed by spraying the first to third cleaning agent clusters.
- the substrate cleaning apparatus and the substrate cleaning method according to the embodiment it is possible to remove more various contaminants from the substrate as compared with the cryogenic aerosol irradiation method while avoiding the technical problem of wet cleaning.
- the substrate cleaning apparatus and the substrate cleaning method according to the present embodiment are useful. It can also be applied to mask cleaning of a multilayer device manufacturing apparatus such as an organic EL.
- One of organic EL organic vapor deposition methods is a linear source method. In this vapor deposition method, a mask is placed on a glass substrate, and a plurality of organic materials are continuously vapor deposited. Since the mask is used repeatedly, a plurality of organic materials are deposited on the mask surface.
- the substrate cleaning apparatus In order to prevent this deposit from peeling off during film formation and contaminating the substrate, periodic mask cleaning or replacement is necessary. Therefore, the substrate cleaning apparatus according to the present embodiment is provided in the multilayer device manufacturing apparatus, and the mask cleaning is possible by continuously spraying a cluster of cleaning agents corresponding to the removal of a plurality of organic materials. Thus, an organic EL device can be efficiently manufactured.
- the disassembled objects to be cleaned can be blown off and sucked to the first to third suction parts 31d, 32d, 33d side by the transfer of the first to third nozzles 31c, 32c, 33c and the injection of the clusters.
- the processing chamber 1 can be downsized as compared with the case where the wafer W is transferred.
- a cluster irradiation head provided with three nozzles and a suction unit has been described.
- two or more nozzles and suction units may be provided in the cluster irradiation head.
- FIG. 10 is an explanatory view conceptually showing an example of a substrate cleaning method performed using four cleaning agents.
- FIG. 10A shows the wafer W before the etching process. On the wafer W, an insulating layer, a gate, and a resist are sequentially laminated to form a multilayer structure.
- FIG. 10B shows the wafer W after etching the wafer shown in FIG. 10A. After the multilayer structure is etched, organic residues, metal residues and other particles adhere to the wafer W.
- the first nozzle is an organic solvent
- the second nozzle is ozone
- the third nozzle is hydrochloric acid
- the fourth nozzle is nitrogen N2 gas.
- the organic object to be cleaned is decomposed by the cluster injection of the organic solvent, and then organic substances other than the resist are decomposed by the cluster injection of ozone. Following the cluster injection of ozone, the metal is also decomposed by the cluster injection of hydrochloric acid. Finally, by injecting nitrogen N 2 soot gas, the decomposed object to be cleaned is removed from the wafer. According to the substrate processing apparatus configured as described above, the resist, the organic residue, the metal residue, and the particles can be removed from the wafer W.
- the substrate cleaning apparatus may be provided with an electron beam irradiation unit that irradiates the wafer W with an electron beam.
- the substrate cleaning apparatus may be provided with ionization means for ionizing the cleaning agent cluster.
- the substrate cleaning apparatus may be provided with heating means for heating the wafer W.
- the heating means includes, for example, a heater provided on the substrate support, an infrared lamp that irradiates the wafer W with infrared rays, and the like.
- the processing chamber 1 may be provided with a reaction promoting gas supply unit that supplies the processing chamber 1 with a gas that promotes the reaction between the cleaning agent and the cleaning target.
- a configuration in which a plurality of nozzles are provided in one nozzle arm has been described, but a configuration in which a plurality of nozzle arms are provided, and a plurality of nozzles may be provided in each nozzle arm, It is also possible to provide a nozzle for injecting one type of cleaning agent in each nozzle arm.
- the substrate cleaning apparatus according to the modified example 1 is configured to transport the object to be cleaned, which has been decomposed by the cluster injection of the cleaning agent, to the first to third suction units by the transport gas. Since the substrate cleaning apparatus according to the first modification differs from the above-described embodiment only in the configuration relating to the first to third nozzles and the carrier gas, the difference will be mainly described below.
- FIG. 11 is a side sectional view schematically showing one configuration example of the substrate cleaning apparatus according to the first modification
- FIG. 12 is a side schematically showing one configuration example of the cluster ejection head 203 according to the first modification. It is sectional drawing.
- the first to third nozzles 231c, 232c, and 233c of the cluster ejection head 203 constituting the substrate cleaning apparatus according to the first modification are arranged by the nozzle arm 42 so that the ejection direction of the cleaning agent is substantially normal to the wafer W. It is supported.
- the cleaning agent is cluster-injected substantially perpendicularly to the wafer W on which the pattern shown in FIG. 10 is formed, the cleaning effect can be further improved as compared with the case of injecting in an oblique direction.
- the first to third nozzles 31c, 32c, and 33c are arranged so as to spray in the non-normal direction of the wafer W.
- the first to third nozzles 231c, 232c, and 233c are arranged so that the spray direction is the normal direction of the wafer W, thereby preventing the cleaning gas from being blocked locally.
- a carrier gas for delivering the decomposed object to be cleaned to the first to third suction parts 31 d, 32 d, 33 d side to the surface of the wafer W is provided.
- the carrier gas delivery port 13 may be provided at a portion facing the exhaust unit 10 provided above the table unit 21.
- a carrier gas supply pipe 81 connected to a carrier gas supply unit 83 that supplies carrier gas such as argon gas and nitrogen gas is connected to the exhaust unit 10.
- the carrier gas supply unit 83 is provided with an on-off valve 82.
- the opening / closing operation of the opening / closing valve 82 is controlled by the control unit 7.
- the opening / closing timing of the opening / closing valve 82 is not particularly limited.
- the control unit 7 may be configured to alternately open and close the first to third cleaning agent opening / closing valves and the opening / closing valve 82.
- the cleaning agent cluster irradiation and the carrier gas delivery may be performed in parallel by optimizing the flow rate of the carrier gas.
- the cleaning target can be more effectively removed by spraying the cleaning agent substantially perpendicularly to the wafer W, and the carrier gas Is delivered to the wafer W, so that the object to be cleaned can be effectively sucked.
- the configuration including both the carrier gas delivery port and the first to third suction units has been described, but the first to third suction units are eliminated and the feed is sent from the carrier gas delivery port. You may comprise so that a to-be-cleaned object may be conveyed outside with gas.
- the substrate cleaning apparatus according to the modified example 2 is configured to fix the cluster ejection head to the processing chamber and transfer the wafer side. Since only the structure of the substrate cleaning apparatus according to the modification 2 is different from that of the above-described embodiment, the difference will be mainly described below.
- FIG. 13 is a side sectional view schematically showing a configuration example of the substrate cleaning apparatus in the second modification.
- the substrate cleaning apparatus according to Modification 2 includes a processing chamber 301 in which the cluster ejection head 3 is fixed at a substantially central portion of the top plate.
- a driving mechanism 343 that moves the table unit 21 in the horizontal direction is provided at the bottom of the processing chamber 301.
- the drive mechanism 343 can move the table unit 21 in such a range that at least the entire surface of the wafer W can be scanned by the cluster ejection head 3.
- the processing chamber 301 has a lateral width necessary for moving the table unit 21 within a range in which the entire surface of the wafer W can be scanned by the cluster ejection head 3.
- the driving mechanism 343 corresponds to a unit that relatively moves the substrate and the cluster injection unit along the surface of the substrate to which the object to be cleaned is attached.
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Abstract
Description
第1の課題:超音波、2流体スプレー等の物理的補助手段を利用した場合、微細化されたデバイス構造が物理的に損傷することがある。
第2の課題:微細化されたデバイス構造が水の表面張力によって崩壊することがある。
第3の課題:ウェット洗浄後に基板を乾燥させた場合、基板表面にウォーターマークが発生し、デバイス性能の劣化及び不良を招く。
第4の課題:基板に形成された水溶性材料、例えばLaが洗浄工程で損傷することがある。
第5の課題:基板に形成された被洗浄物以外の基板材料が洗浄によって損失することがある。
第6の課題:洗浄工程において帯電した水と、基板との間で発生した放電によって、デバイス構造が破壊されることがある。
更に、水を用いた洗浄では無いため、マイクロラフネス、ウォーターマーク、基板材料損失、デバイス構造の破壊といったウェット洗浄が有していた技術的課題を回避することが可能である。
更にまた、イオンビームを照射した場合、イオン及び電子によって基板が損傷する虞があるが、洗浄剤のクラスターを基板に噴射した場合、有機溶剤分子は基板表面に沿って広がるのみであり、基板が損傷することは無い。
図1は、本発明の実施の形態に係る基板洗浄装置の一構成例を模式的に示した側断面図、図2は、図1のII-II線断面図、図3は、クラスター噴射ヘッド3の一構成例を模式的に示した側断面図である。本実施の形態に係る基板洗浄装置は、ウェハWを収容する中空略直方体の処理室(収容体)1を備える。処理室1には、図2に示すように、処理室1内の処理空間にウェハWを搬入及び搬出させるための搬入出口11が設けられている。この搬入出口11を扉体12で閉じることにより、処理空間を密閉状態にすることができる。
次に、ウェハWから、上述の基板洗浄装置を用いて被洗浄物を除去する方法を説明する。
図6乃至図9は、本発明の実施の形態に係る基板洗浄方法の一例を概念的に示した説明図である。図6に示すように、ウェハWには、第1乃至第3洗浄剤によってそれぞれ洗浄が可能な3種類の被洗浄物が付着している場合を説明する。まず、制御部7は、真空ポンプ6を駆動させて、処理室1の内部を約10Paに減圧させ、駆動機構43の動作を制御することによって、クラスター噴射ヘッド3をウェハWの一端側(例えば、図1中左端側)へ移送する。そして、制御部7は、第1乃至第3開閉弁31b、32b、33bを開状態にさせることによって、第1乃至第3洗浄剤を第1乃至第3ノズル31c,32c,33cへ供給させる。次いで、制御部7は、吸引ポンプ35を駆動させることによって、第1乃至第3洗浄剤のクラスター噴射によって除去された被洗浄物の吸引を開始する。また、制御部7は、駆動機構43の動作を制御することによって、クラスター噴射ヘッド3をウェハWの一端から他端側(例えば、図1中右端側)へ所定速度で移送させる。第1乃至第3ノズル31c,32c,33cへ供給された第1乃至第3洗浄剤は、処理室1内のウェハWに向けて噴射されるが、処理室1の内部が真空ポンプ6によって減圧されているため、噴射された第1乃至第3洗浄剤は、断熱膨張し、第1乃至第3洗浄剤分子が集合してなるクラスターが各別に生成される。生成された第1乃至第3洗浄剤のクラスターは、ウェハW表面に衝突する。
特に多層構造のエッチング後には、多様な洗浄対象物がウェハWに付着しているため、本実施の形態に係る基板洗浄装置及び基板洗浄方法は有用である。
また、有機ELのような多層デバイス製造装置のマスク洗浄にも適用することができる。有機ELの有機蒸着方法の一つに、リニアソース方式がある。この蒸着方法は、ガラス基板にマスクを設置し、複数の有機材料を連続的に蒸着させる。マスクは繰り返し使用するため、マスク表面には複数の有機材料が堆積する。この堆積物が成膜時に剥離し、基板を汚染する事を防ぐためには、定期的なマスク洗浄もしくは交換が必要である。そこで、本実施の形態に係る基板洗浄装置を前記多層デバイス製造装置に設け、複数の有機材料の除去に対応する洗浄剤のクラスターを連続的に噴射するように構成することによって、マスク洗浄が可能となり、効率的に有機ELデバイスを製造することが可能になる。
変形例1に係る基板洗浄装置は、洗浄剤のクラスター噴射によって分解した被洗浄物を搬送する搬送ガスによって第1乃至第3吸引部へ搬送するように構成されている。変形例1に係る基板洗浄装置は、第1乃至第3ノズル及び搬送ガスに係る構成のみが上述の実施の形態と異なるため、以下では主に上記相異点について説明する。
つまり、図3に示す実施形態では、ウェハWの非法線方向に噴射するように第1乃至第3ノズル31c,32c,33cが配置されているが、ウェハW上に形成されたパターンなどによって、局所的に洗浄剤が遮られてクラスターが衝突しない箇所が発生する虞がある。そこで、図12に示すように、噴射方向がウェハWの法線方向になるように第1乃至第3ノズル231c,232c,233cを配置することによって、局所的に洗浄ガスが遮られるのを防止して、クラスターが衝突しない箇所が発生するのを防止することができる。
変形例2に係る基板洗浄装置は、クラスター噴射ヘッドを処理室に固定し、ウェハ側を移送させるように構成されている。変形例2に係る基板洗浄装置は、斯かる構成のみが上述の実施の形態と異なるため、以下では主に上記相異点について説明する。
2 ウェハ支持台
3 クラスター噴射ヘッド
6 真空ポンプ
7 制御部
83 搬送ガス供給部
13 搬送ガス送出口
31a 第1洗浄剤供給管
32a 第2洗浄剤供給管
33a 第3洗浄剤供給管
31b 第1開閉弁
32b 第2開閉弁
33b 第3開閉弁
31c 第1ノズル(クラスター噴射手段)
32c 第2ノズル(クラスター噴射手段)
33c 第3ノズル(クラスター噴射手段)
31d 第1吸引部(吸引手段)
32d 第2吸引部(吸引手段)
33d 第3吸引部(吸引手段)
34 吸引管
35 吸引ポンプ
41 ガイドレール
42 ノズルアーム(支持部材)
43 駆動機構
51 第1洗浄剤供給部(洗浄剤収容部)
52 第2洗浄剤供給部(洗浄剤収容部)
53 第3洗浄剤供給部(洗浄剤収容部)
81 搬送ガス供給管
82 開閉弁
W ウェハ
Claims (10)
- 被洗浄物が付着した基板を洗浄する基板洗浄装置において、
洗浄剤分子が複数集合してなるクラスターを前記基板に噴射するクラスター噴射手段と、
前記洗浄剤分子のクラスターを噴射することによって除去された被洗浄物を吸引する吸引手段と、
前記基板及び前記クラスター噴射手段を、被洗浄物が付着した基板の面に沿って相対移動させる手段と
を備えることを特徴とする基板洗浄装置。 - 前記基板を収容する収容体と、
該収容体の内部を減圧する真空ポンプと、
洗浄剤を収容する洗浄剤収容部と
を備え、
前記クラスター噴射手段は、
前記洗浄剤収容部から前記収容体へ前記洗浄剤を供給する供給路と、
該供給路を通じて供給された洗浄剤を噴射する複数のノズルと
を備え、
前記複数のノズルは並設されている
ことを特徴とする請求項1に記載の基板洗浄装置。 - 前記吸引手段は複数の吸引部を備え、
複数の前記吸引部は各ノズルに並設されている
ことを特徴とする請求項2に記載の基板洗浄装置。 - 被洗浄物が付着した基板を洗浄する基板洗浄装置において、
洗浄剤分子が複数集合してなるクラスターを前記基板に夫々噴射するクラスター噴射手段と、
前記洗浄剤分子のクラスターを噴射することによって除去された被洗浄物を外部へ搬送する搬送ガスを基板に送出する手段と、
前記基板及び前記クラスター噴射手段を、被洗浄物が付着した基板の面に沿って相対移動させる手段と
を備えることを特徴とする基板洗浄装置。 - 前記基板を収容する収容体と、
該収容体の内部を減圧する真空ポンプと、
洗浄剤を収容する洗浄剤収容部と
を備え、
前記クラスター噴射手段は、
前記洗浄剤収容部から前記収容体へ前記洗浄剤を供給する供給路と、
該供給路を通じて供給された洗浄剤を噴射する複数のノズルと
を備え、
前記複数のノズルは並設されている
ことを特徴とする請求項4に記載の基板洗浄装置。 - 前記ノズルの噴射口断面は線状であることを特徴とする請求項2、3又は5に記載の基板洗浄装置。
- 前記洗浄剤の噴射方向が前記基板の非法線方向になるように複数の前記ノズルを支持する支持部材を備える
ことを特徴とする請求項2、3、5又は6のいずれか一つに記載の基板洗浄装置。 - 前記複数の洗浄剤分子は、
有機溶媒、フッ化水素、塩酸、オゾン、アンモニア過酸化水素、水、イソプロピルアルコール、窒素及びアルゴンからなる群より選択される物質の分子である
ことを特徴とする請求項1乃至請求項7のいずれか一つに記載の基板洗浄装置。 - 被洗浄物が付着した基板を洗浄する基板洗浄方法において、
洗浄剤分子が複数集合してなるクラスターを前記基板に噴射する工程と、
前記洗浄剤分子のクラスターを噴射することによって除去された被洗浄物を吸引する工程と、
クラスターの噴射箇所を変更する工程と
を有することを特徴とする基板洗浄方法。 - 被洗浄物が付着した基板を洗浄する基板洗浄方法において、
洗浄剤分子が複数集合してなるクラスターを前記基板に噴射する工程と、
前記洗浄剤分子のクラスターを噴射することによって除去された被洗浄物を外部へ搬送する搬送ガスを基板に送出する工程と、
クラスターの噴射箇所を変更する工程と
を有することを特徴とする基板洗浄方法。
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US11747742B2 (en) | 2017-04-11 | 2023-09-05 | Visera Technologies Company Limited | Apparatus and method for removing photoresist layer from alignment mark |
Also Published As
Publication number | Publication date |
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KR101497199B1 (ko) | 2015-02-27 |
JP5623104B2 (ja) | 2014-11-12 |
US9099298B2 (en) | 2015-08-04 |
KR20120135423A (ko) | 2012-12-13 |
US20130008470A1 (en) | 2013-01-10 |
JP2011198934A (ja) | 2011-10-06 |
CN102770942B (zh) | 2016-03-23 |
CN102770942A (zh) | 2012-11-07 |
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