WO2022185929A1 - 基板処理方法及び基板処理システム - Google Patents
基板処理方法及び基板処理システム Download PDFInfo
- Publication number
- WO2022185929A1 WO2022185929A1 PCT/JP2022/006285 JP2022006285W WO2022185929A1 WO 2022185929 A1 WO2022185929 A1 WO 2022185929A1 JP 2022006285 W JP2022006285 W JP 2022006285W WO 2022185929 A1 WO2022185929 A1 WO 2022185929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- back surface
- wafer
- film
- cleaning
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 212
- 238000003672 processing method Methods 0.000 title claims abstract description 25
- 238000012545 processing Methods 0.000 title claims description 233
- 238000005498 polishing Methods 0.000 claims abstract description 58
- 238000005530 etching Methods 0.000 claims abstract description 55
- 238000004140 cleaning Methods 0.000 claims description 88
- 230000007246 mechanism Effects 0.000 claims description 82
- 239000007788 liquid Substances 0.000 claims description 73
- 239000000126 substance Substances 0.000 claims description 32
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 16
- 229910052581 Si3N4 Inorganic materials 0.000 claims description 13
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 claims description 13
- 229910052814 silicon oxide Inorganic materials 0.000 claims description 11
- 239000003595 mist Substances 0.000 claims description 4
- 235000012431 wafers Nutrition 0.000 description 157
- 238000000034 method Methods 0.000 description 66
- 230000008569 process Effects 0.000 description 61
- 238000012546 transfer Methods 0.000 description 33
- 239000002245 particle Substances 0.000 description 19
- 238000007517 polishing process Methods 0.000 description 17
- 238000010586 diagram Methods 0.000 description 14
- 230000032258 transport Effects 0.000 description 14
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 10
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000001035 drying Methods 0.000 description 7
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 6
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 6
- 239000007789 gas Substances 0.000 description 5
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910021529 ammonia Inorganic materials 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000011144 upstream manufacturing Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
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
- H01L21/02096—Cleaning only mechanical cleaning
-
- 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
- H01L21/02041—Cleaning
- H01L21/02082—Cleaning product to be cleaned
- H01L21/0209—Cleaning of wafer backside
-
- 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
- H01L21/304—Mechanical treatment, e.g. grinding, 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
- H01L21/04—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
-
- 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
-
- 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
- H01L21/67046—Apparatus for fluid treatment for cleaning followed by drying, rinsing, stripping, blasting or the like for wet cleaning or washing using mainly scrubbing means, e.g. brushes
-
- 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
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67075—Apparatus for fluid treatment for etching for wet 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
- H01L21/67—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
- H01L21/67155—Apparatus for manufacturing or treating in a plurality of work-stations
- H01L21/67161—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers
- H01L21/67173—Apparatus for manufacturing or treating in a plurality of work-stations characterized by the layout of the process chambers in-line arrangement
-
- 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
- H01L21/677—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 for conveying, e.g. between different workstations
- H01L21/67703—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 for conveying, e.g. between different workstations between different workstations
- H01L21/67718—Changing orientation of the substrate, e.g. from a horizontal position to a vertical position
Definitions
- the present disclosure relates to a substrate processing method and a substrate processing system.
- the present disclosure provides a technology capable of appropriately removing foreign matter from the back surface of the substrate on which the film is formed.
- a substrate processing method includes an etching process and a polishing process.
- the etching step the film on the substrate having the film formed on the back surface opposite to the main surface is etched.
- the polishing step polishes the back surface of the substrate after the etching step.
- FIG. 1 is a schematic plan view of a substrate processing system according to an embodiment.
- FIG. 2 is a schematic side view of the substrate processing system according to the embodiment.
- FIG. 3 is a diagram showing the structure of a wafer according to the embodiment.
- FIG. 4 is a schematic diagram of a first processing unit according to the embodiment.
- FIG. 5 is a schematic plan view of a second processing unit according to the embodiment.
- FIG. 6 is a schematic side view of the second processing unit according to the embodiment;
- FIG. 7 is a flow chart showing a procedure of substrate processing executed by the substrate processing system according to the embodiment.
- FIG. 8A is a diagram illustrating an example of the operation of the first processing unit;
- FIG. 8B is a diagram illustrating an example of the operation of the first processing unit;
- FIG. 8A is a diagram illustrating an example of the operation of the first processing unit;
- FIG. 8B is a diagram illustrating an example of the operation of the first processing unit;
- FIG. 8A is
- FIG. 9A is a diagram illustrating an example of the operation of the second processing unit
- 9B is a diagram illustrating an example of the operation of the second processing unit
- FIG. 9C is a diagram illustrating an example of the operation of the second processing unit
- FIG. 9D is a diagram illustrating an example of the operation of the second processing unit
- FIG. 10 is a diagram for explaining improvement of the foreign matter removal rate by the substrate processing method according to the embodiment.
- FIG. 11 is a schematic plan view of a substrate processing system according to a modification of the embodiment;
- a film may be formed on the back surface of the substrate for various purposes.
- no consideration is given to removing foreign matter from the back surface of the substrate on which the film is formed.
- the back surface of the substrate is polished, the back surface of the substrate may be damaged by particles embedded in the film on the back surface of the substrate or attached to the back surface of the substrate, and new burrs may be generated. Therefore, there is a demand for a technology capable of appropriately removing foreign matter from the back surface of the substrate on which the film is formed.
- FIG. 1 is a schematic plan view of a substrate processing system 1 according to an embodiment.
- FIG. 2 is a schematic side view of the substrate processing system 1 according to the embodiment.
- the X-axis, Y-axis and Z-axis are defined to be orthogonal to each other, and the positive direction of the Z-axis is defined as the vertically upward direction.
- the substrate processing system 1 includes a loading/unloading station 2, a delivery station 3, and a processing station 4. These are arranged side by side in the order of loading/unloading station 2 , delivery station 3 and processing station 4 .
- the substrate processing system 1 conveys a substrate loaded from the loading/unloading station 2, which is a semiconductor wafer (hereinafter referred to as wafer W) in this embodiment, to the processing station 4 via the transfer station 3, where it is processed.
- the substrate processing system 1 returns the processed wafer W from the processing station 4 to the loading/unloading station 2 via the transfer station 3, and unloads the wafer W from the loading/unloading station 2 to the outside.
- the loading/unloading station 2 includes a cassette mounting section 11 and a transport section 12 .
- a plurality of cassettes C accommodating a plurality of wafers W in a horizontal state are mounted on the cassette mounting portion 11 .
- the transport section 12 is arranged between the cassette mounting section 11 and the transfer station 3, and has a first transport device 13 inside.
- the first transfer device 13 includes a plurality of (for example, five) wafer holders that hold one wafer W. As shown in FIG.
- the first transfer device 13 is capable of horizontal and vertical movement and pivoting about a vertical axis. W can be transported at the same time.
- a plurality of substrate platforms (SBU) 14 and a plurality of reversing mechanisms (RVS) 15 are arranged inside the delivery station 3.
- one substrate platform 14 is arranged at a position corresponding to the first processing station 4U and a position corresponding to the second processing station 4L of the processing station 4, which will be described below.
- one reversing mechanism 15 is arranged at a position corresponding to the first processing station 4U and a position corresponding to the second processing station 4L of the processing station 4, respectively.
- the processing station 4 includes a first processing station 4U and a second processing station 4L.
- the first processing station 4U and the second processing station 4L are spatially partitioned by a partition wall, a shutter, or the like, and arranged side by side in the height direction.
- the first processing station 4U and the second processing station 4L have the same configuration, and as shown in FIG. 18 and a plurality of second processing units (CH2) 19 .
- the second transfer device 17 is arranged inside the transfer section 16 and transfers the wafer W between the transfer station 3 , the first processing unit 18 and the second processing unit 19 .
- the second transfer device 17 has one wafer holder that holds one wafer W.
- the second transfer device 17 is capable of horizontal and vertical movement and rotation about a vertical axis, and transfers one wafer W using a wafer holder.
- the plurality of first processing units 18 and the plurality of second processing units 19 are arranged adjacent to the transport section 16 .
- the plurality of first processing units 18 are arranged side by side along the X-axis direction on the Y-axis positive direction side of the transport section 16, and the plurality of second processing units 19 are arranged on the Y-axis negative direction side of the transport section 16. are arranged side by side along the X-axis direction.
- the first processing unit 18 performs a predetermined process on the wafer W with its main surface Wa (see FIG. 3) facing upward.
- the first processing unit 18 performs a process of etching the film F (see FIG. 3) formed on the back surface Wb of the wafer W (see FIG. 3).
- the main surface Wa of the wafer W is the surface on which a pattern (a circuit formed in a convex shape) is formed, and the back surface Wb is the surface opposite to the main surface Wa. Details of the first processing unit 18 will be described later.
- the film F formed on the back surface Wb of the wafer W is, for example, a silicon nitride film, a silicon oxide film, or a multilayer film containing a silicon nitride film and a silicon oxide film.
- the film F is a multilayer film in which a silicon oxide film F1 (see FIG. 3) and a silicon nitride film F2 (see FIG. 3) are laminated in order from the back surface Wb side of the wafer W. As shown in FIG.
- the second processing unit 19 performs predetermined processing on the wafer W with the back surface Wb (see FIG. 3) facing upward.
- the second processing unit 19 mainly performs a process of polishing the back surface Wb of the wafer W (see FIG. 3) and a process of cleaning the back surface Wb of the wafer W (see FIG. 3) with a brush. Details of the second processing unit 19 will be described later.
- the substrate processing system 1 includes a control device 5.
- the control device 5 is a computer, for example, and includes a control section 6 and a storage section 7 .
- the storage unit 7 stores programs for controlling various processes executed in the substrate processing system 1 .
- the control unit 6 controls the operation of the substrate processing system 1 by reading and executing programs stored in the storage unit 7 .
- the program may be recorded in a computer-readable storage medium and installed in the storage unit 7 of the control device 5 from the storage medium.
- Examples of computer-readable storage media include hard disks (HD), flexible disks (FD), compact disks (CD), magnet optical disks (MO), and memory cards.
- the first transfer device 13 of the loading/unloading station 2 takes out the wafer W from the cassette C, and places the taken out wafer W on the substrate platform 14 of the delivery station 3. Place.
- the wafer W placed on the substrate platform 14 is taken out from the substrate platform 14 by the second transfer device 17 of the processing station 4 and carried into the first processing unit 18 where it undergoes etching processing. is applied.
- the second transfer device 17 takes out the processed wafer W from the first processing unit 18 and transfers it to the reversing mechanism 15, and the reversing mechanism 15 turns the wafer W upside down.
- the wafer W whose front and back sides are reversed is taken out from the reversing mechanism 15 by the second transfer device 17 and carried into the second processing unit 19 , where the second processing unit 19 performs polishing processing and cleaning processing.
- the second transport device 17 takes out the processed wafer W from the second processing unit 19 and transports it to the reversing mechanism 15, and the reversing mechanism 15 again reverses the front and back of the wafer W.
- the wafer W whose front and back sides have been reversed again is taken out from the reversing mechanism 15 and returned to the cassette C by the first transfer device 13 .
- FIG. 3 is a diagram showing the configuration of the wafer W according to the embodiment.
- the wafer W shown in FIG. 3 is, for example, a silicon wafer or the like.
- a pattern is formed on the main surface Wa, and a silicon oxide film F1 and a silicon nitride film F2 are formed on the back surface Wb opposite to the main surface Wa.
- a film F which is a multilayer film in which is laminated, is formed.
- the pattern formed in the main surface Wa of the wafer W is abbreviate
- the substrate processing system removes foreign matter from the rear surface Wb of the wafer W by, for example, cleaning processing or polishing processing using a brush (hereinafter referred to as “polishing processing or the like” as appropriate).
- the back surface Wb of the wafer W is polished, the back surface Wb of the wafer W is damaged by the particles P1 adhering to the back surface Wb of the wafer W and the particles P2 embedded in the film F, and new burrs B1 are formed. It may occur. Further, when the back surface Wb of the wafer W is subjected to the cleaning process, it is difficult to remove the particles P2 embedded in the film F.
- the film F formed on the back surface Wb is etched in the first processing unit 18 to remove the particles P1 and P2 prior to the polishing processing in the second processing unit 19 or the like.
- the burrs B1 remaining on the back surface Wb are removed by polishing or the like.
- foreign matter can be appropriately removed from the rear surface Wb of the wafer W on which the film F is formed.
- FIG. 4 is a schematic diagram of the first processing unit 18 according to the embodiment.
- the first processing unit 18 includes a chamber 21 , a substrate holding section 22 , a processing liquid supply section 23 and a collection cup 24 .
- the chamber 21 accommodates the substrate holding part 22, the processing liquid supply part 23, and the recovery cup 24.
- An FFU 21 a that forms a down flow inside the chamber 21 is provided on the ceiling of the chamber 21 .
- the substrate holding section 22 includes a holding section 22a that horizontally holds the wafer W, a support member 22b that extends in the vertical direction and supports the holding section 22a, and a driving section 22c that rotates the support member 22b around the vertical axis. Prepare.
- a plurality of gripping portions 22a1 for gripping the peripheral portion of the wafer W are provided on the upper surface of the holding portion 22a, and the wafer W is horizontally held by the gripping portions 22a1 while being slightly separated from the upper surface of the holding portion 22a. be done.
- the treatment liquid supply part 23 is inserted through a hollow part passing through the holding part 22a and the support member 22b along the rotation axis.
- a flow path extending along the rotation axis is formed inside the treatment liquid supply unit 23 .
- a first chemical liquid supply section 25, a second chemical liquid supply section 26, and a rinse liquid supply section 27 are connected in parallel to a channel formed inside the treatment liquid supply section 23.
- the first chemical supply unit 25 has, in order from the upstream side, a first chemical supply source 25a, a valve 25b, and a flow rate regulator 25c.
- the first chemical supply source 25a is, for example, a tank that stores the first chemical.
- the flow rate regulator 25c adjusts the flow rate of the first chemical liquid supplied from the first chemical liquid supply source 25a to the processing liquid supply section 23 via the valve 25b.
- the first chemical liquid is hydrofluoric acid.
- the second chemical supply unit 26 has, in order from the upstream side, a second chemical supply source 26a, a valve 26b, and a flow rate regulator 26c.
- the second chemical supply source 26a is, for example, a tank that stores the second chemical.
- the flow rate regulator 26c adjusts the flow rate of the second chemical liquid supplied from the second chemical liquid supply source 26a to the processing liquid supply section 23 via the valve 26b.
- the second chemical liquid is SC-1 (a mixture of ammonia, hydrogen peroxide, and water).
- the rinse liquid supply unit 27 has, in order from the upstream side, a rinse liquid supply source 27a, a valve 27b, and a flow rate regulator 27c.
- the rinse liquid supply source 27a is, for example, a tank that stores a rinse liquid such as DIW.
- the flow rate adjuster 27c adjusts the flow rate of the rinse liquid supplied from the rinse liquid supply source 27a to the processing liquid supply section 23 via the valve 27b.
- the processing liquid supply unit 23 applies the chemical liquid supplied from at least one of the first chemical liquid supply unit 25 , the second chemical liquid supply unit 26 and the rinse liquid supply unit 27 to the back surface Wb of the wafer W held by the substrate holding unit 22 . (See FIG. 3).
- the first processing unit 18 can heat the chemical liquid discharged from the processing liquid supply section 23 to a predetermined temperature by a heater (not shown).
- the collection cup 24 is arranged so as to surround the substrate holder 22 .
- a liquid discharge port 24a for discharging the chemical liquid supplied from the processing liquid supply section 23 to the outside of the chamber 21 and an exhaust port 24b for exhausting the atmosphere in the chamber 31 are formed. be done.
- the first processing unit 18 is configured as described above, and after holding the peripheral portion of the wafer W with the main surface Wa directed upward by the plurality of holding portions 22a1 of the holding portion 22a, the driving portion 22c is used to hold the peripheral edge portion of the wafer W. to rotate the wafer W.
- the first processing unit 18 sequentially supplies a plurality of chemical liquids from the processing liquid supply section 23 toward the center of the back surface Wb of the rotating wafer W.
- the first processing unit 18 supplies hydrofluoric acid, DIW, SC-1 and DIW from the processing liquid supply unit 23 toward the center of the back surface Wb of the rotating wafer W in this order.
- the film F formed on the back surface Wb of the wafer W is etched.
- the particles P1 adhering to the back surface Wb of the wafer W and the particles P2 embedded in the film F on the back surface Wb of the wafer W are removed.
- the first processing unit 18 performs a rinsing process of washing away SC-1 remaining on the wafer W with DIW, which is a rinsing liquid, and then performs a drying process of drying the wafer W by rotating the wafer W.
- FIG. 5 is a schematic plan view of the second processing unit 19 according to the embodiment.
- FIG. 6 is a schematic side view of the second processing unit 19 according to the embodiment.
- the second processing unit 19 includes a chamber 201, a substrate holding section 202, a collection cup 203, a polishing mechanism 204, a cleaning mechanism 205, a first supply section 206, a first 2 supply unit 207 .
- the chamber 201 accommodates a substrate holding part 202 , a collection cup 203 , a polishing mechanism 204 , a cleaning mechanism 205 , a first supply part 206 and a second supply part 207 .
- the ceiling of the chamber 201 is provided with an FFU (Fun Filter Unit) 211 that forms a downflow inside the chamber 201 .
- the substrate holding part 202 includes a main body part 221 having a diameter larger than that of the wafer W, a plurality of gripping parts 222 provided on the upper surface of the main body part 221, a support member 223 supporting the main body part 221, and a support member 223 that rotates.
- a drive unit 224 is provided to allow the
- the substrate holding part 202 holds the wafer W by gripping the peripheral edge of the wafer W using a plurality of gripping parts 222 . Thereby, the wafer W is held horizontally while being slightly separated from the upper surface of the body portion 221 .
- the collection cup 203 is arranged so as to surround the substrate holder 202 .
- a drainage port 231 for discharging the chemical liquid discharged from the first supply part 206 and the second supply part 207 to the outside of the chamber 201, and a discharge port 231 for exhausting the atmosphere in the chamber 201.
- An exhaust port 232 is formed.
- the polishing mechanism 204 includes a polishing brush 241 and an arm 243 that extends horizontally (here, in the Y-axis direction) and supports the polishing brush 241 from above via a shaft 242 .
- the polishing mechanism 204 also includes a moving mechanism 245 that moves the arm 243 along the rail 244 in the horizontal direction (here, the X-axis direction).
- the moving mechanism 245 can also move the arm 243 in the vertical direction (Z-axis direction).
- the polishing mechanism 204 also has a rotation mechanism (not shown), and can rotate the polishing brush 241 around the shaft 242 using this rotation mechanism.
- the cleaning mechanism 205 includes a brush 251 and an arm 253 that extends horizontally (here, in the Y-axis direction) and supports the brush 251 from above via a shaft 252 .
- the cleaning mechanism 205 also includes a moving mechanism 255 that moves the arm 253 along the rail 254 in the horizontal direction (here, the X-axis direction).
- the moving mechanism 255 can also move the arm 253 in the vertical direction (Z-axis direction).
- the cleaning mechanism 205 also has a rotation mechanism (not shown), and can rotate the brush 251 around the shaft 252 using this rotation mechanism.
- the first supply unit 206 is arranged outside the collection cup 203 .
- the first supply unit 206 includes a nozzle 261 , an arm 262 that extends horizontally and supports the nozzle 261 , and a turning and lifting mechanism 263 that turns and lifts the arm 262 .
- the nozzle 261 is connected to a first cleaning liquid supply source 265 via a valve 264, a flow regulator (not shown), and the like. Also, the nozzle 261 is connected to a rinse liquid supply source 267 via a valve 266, a flow rate regulator (not shown), and the like.
- the first supply unit 206 discharges the first cleaning liquid supplied from the first cleaning liquid supply source 265 toward the wafer W. As shown in FIG. Further, the first supply unit 206 discharges the rinse liquid supplied from the rinse liquid supply source 267 toward the wafer W. As shown in FIG.
- the first cleaning liquid supplied from the first cleaning liquid supply source 265 is SC-1, for example. Also, the rinse liquid supplied from the rinse liquid supply source 267 is, for example, DIW.
- the second supply part 207 is arranged outside the collection cup 203 .
- the second supply unit 207 includes a nozzle 271 , an arm 272 that extends horizontally and supports the nozzle 271 , and a turning and lifting mechanism 273 that turns and lifts the arm 272 .
- the nozzle 271 is, for example, a two-fluid nozzle, and is connected to the second cleaning liquid supply source 275 via a valve 274 and a flow regulator (not shown), etc. to gas supply 277 via .
- the second supply unit 207 mixes the cleaning liquid supplied from the second cleaning liquid supply source 275 and the gas supplied from the gas supply source 277 in the nozzle 271 to produce a mist of the cleaning liquid to the wafer W from the nozzle 271 . supply.
- the cleaning liquid supplied from the second cleaning liquid supply source 275 is, for example, DIW
- the gas supplied from the gas supply source 277 is, for example, an inert gas such as nitrogen.
- the second processing unit 19 is configured as described above, and rotates the wafer W while holding the peripheral portion of the wafer W with the back surface Wb directed upward by the substrate holding portion 202 . Subsequently, the second processing unit 19 brings the polishing brush 241 of the polishing mechanism 204 arranged above the rotating wafer W into contact with the back surface Wb of the wafer W. As shown in FIG. Then, the second processing unit 19 polishes the rear surface Wb of the wafer W by moving the polishing brush 241 from the central portion of the wafer W to the outer peripheral portion while rotating the polishing brush 241 . As a result, the burrs B1 remaining on the back surface Wb of the wafer W after the etching processing in the first processing unit 18 are removed. At this stage, the shavings of the burr B1 remain on the back surface Wb of the wafer W. As shown in FIG.
- the second processing unit 19 After polishing the back surface Wb of the wafer W, the second processing unit 19 supplies the first cleaning liquid from the first supply unit 206 toward the back surface Wb of the rotating wafer W while moving the brush 251 of the cleaning mechanism 205. The wafer W is brought into contact. Then, the second processing unit 19 moves the brush 251 from the central portion of the wafer W to the outer peripheral portion while rotating the brush 251 . As a result, the back surface Wb of the wafer W is cleaned, and the shavings of the burrs B1 remaining on the back surface Wb of the wafer W can be removed.
- the second processing unit 19 arranges the nozzle 271 of the second supply unit 207 above the rotating wafer W, and supplies the second cleaning liquid in the form of a mist toward the rear surface Wb of the wafer W from the nozzle 271. .
- the back surface Wb of the wafer W is cleaned, and foreign matter that has not been removed by the etching processing in the first processing unit 18, the polishing processing in the second processing unit 19, and the cleaning processing using the brush 251 is removed from the back surface Wb. can be removed from
- the second processing unit 19 performs a rinse process of washing away the chemical liquid remaining on the wafer W by supplying the rinse liquid from the first supply unit 206 . Then, the second processing unit 19 performs a drying process of drying the wafer W by rotating the wafer W.
- FIG. 7 is a flow chart showing the procedure of substrate processing executed by the substrate processing system 1 according to the embodiment.
- 8A and 8B are diagrams explaining an example of the operation of the first processing unit 18, and FIGS. 9A to 9D are diagrams explaining an example of the operation of the second processing unit 19.
- FIG. More specifically, FIGS. 8A and 8B show an operation example of the etching process (step S102) in FIG. 9A and 9B show an operation example of the polishing process (step S103) in FIG. 9C shows an operation example of the first cleaning process (step S104) in FIG. 7, and
- FIG. 9D shows an operation example of the second cleaning process (step S105) in FIG.
- Each processing procedure shown in FIG. 7 is performed based on the control of the control device 5 .
- the etching process (step S102) shown in FIG. 7 is performed in the first processing unit 18. Further, in the substrate processing system 1, the second processing unit 19 performs the processing from the polishing processing (step S103) to the drying processing (step S107) shown in FIG.
- step S101 loading processing is first performed (step S101).
- the wafer W is loaded into the chamber 21 of the first processing unit 18 by the second transfer device 17 .
- the wafer W is loaded with the main surface Wa of the wafer W facing upward.
- step S102 an etching process is performed in the first processing unit 18 (step S102).
- the control section 6 first operates the substrate holding section 22 to hold the wafer W with the plurality of holding sections 22a1 of the holding section 22a.
- particles P1, P2 and burrs B1 exist as foreign matter on the rear surface Wb of the wafer W on which the film F is formed, as shown in FIG. 8A.
- control unit 6 rotates the wafer W as shown in FIG. 8B by operating the driving unit 22c.
- control unit 6 supplies hydrofluoric acid to the back surface Wb of the rotating wafer W by operating the processing liquid supply unit 23 .
- the controller 6 supplies hydrofluoric acid having a concentration of 49% and a temperature of 20° C. to 50° C. for 10 seconds to 180 seconds.
- control unit 6 supplies DIW toward the back surface Wb of the rotating wafer W by operating the processing liquid supply unit 23 .
- control unit 6 supplies SC-1 toward the back surface Wb of the rotating wafer W by operating the processing liquid supply unit 23 .
- control unit 6 supplies DIW toward the back surface Wb of the rotating wafer W by operating the processing liquid supply unit 23 .
- control unit 6 shakes off the chemical solution remaining on the back surface Wb of the wafer W and dries the wafer W by, for example, increasing the rotation speed of the wafer W.
- the film F is etched so that the film F remains on the rear surface Wb of the wafer W as shown in FIG.
- the particles P1 adhering to the back surface Wb of the wafer W and the particles P2 embedded in the film F on the back surface Wb of the wafer W are removed together with the film F.
- the first processing unit 18 etches the film F so that the film F remains on the back surface Wb of the wafer W in the etching process. Accordingly, it is possible to prevent the rear surface Wb of the wafer W from being damaged in the polishing process performed after the etching process.
- the first processing unit 18 etches the film F by sequentially supplying a plurality of chemical solutions to the back surface Wb of the wafer W.
- the silicon nitride film F2 which is the surface layer, can be selectively etched.
- substrate reversing processing is performed.
- the wafer W is unloaded from the chamber 21 by the second transfer device 17, and after the wafer W is reversed by the reversing mechanism 15, the wafer W is transferred into the chamber 201 of the second processing unit 19 by the second transfer device 17. is brought into At this time, the wafer W is carried into the chamber 201 with the back surface Wb facing upward, in other words, with the main surface Wa facing downward.
- step S103 polishing is performed in the second processing unit 19 (step S103).
- the control section 6 first operates the substrate holding section 202 to hold the wafer W with the plurality of holding sections 222 of the substrate holding section 202 .
- burrs B1 remain as foreign matter on the rear surface Wb of the wafer W, as shown in FIG. 9A.
- control unit 6 rotates the wafer W as shown in FIG. 9B by operating the driving unit 22c.
- control unit 6 brings the polishing brush 241 arranged above the rotating wafer W into contact with the back surface Wb of the wafer W by operating the polishing mechanism 204 . Then, the controller 6 polishes the rear surface Wb of the wafer W by moving the polishing brush 241 from the central portion of the wafer W to the outer peripheral portion while rotating the polishing brush 241 .
- the first cleaning process is performed in the second processing unit 19 (step S104).
- the controller 6 causes the brush 251 arranged above the rotating wafer W to come into contact with the rear surface Wb of the wafer W by operating the cleaning mechanism 205 .
- the control unit 6 operates the first supply unit 206 to supply SC-1, which is the first cleaning liquid, toward the back surface Wb of the wafer W from the nozzle 261 arranged above the rotating wafer W.
- the controller 6 cleans the rear surface Wb of the wafer W by rotating the brush 251 and moving it from the central portion of the wafer W to the outer peripheral portion, for example.
- the second cleaning process is performed in the second processing unit 19 (step S105).
- the control unit 6 operates the second supply unit 207 to direct the water from the nozzle 271 arranged above the rotating wafer W to the back surface Wb of the wafer W as shown in FIG. 9D.
- a second cleaning liquid in the form of mist is supplied.
- the back surface Wb of the wafer W is cleaned, and foreign substances that have not been removed by the etching process (step S102), the polishing process (step S103), and the first cleaning process (step S104) can be removed from the back surface Wb. .
- a rinse process is performed in the second processing unit 19 (step S106).
- the control unit 6 operates the first supply unit 206 to supply the rinse liquid from the nozzle 261 arranged above the rotating wafer W toward the back surface Wb of the wafer W.
- FIG. As a result, the chemical solution on the back surface Wb of the wafer W is washed away.
- step S107 the drying process is performed in the second processing unit 19 (step S107).
- the controller 6 shakes off the rinse liquid remaining on the back surface Wb of the wafer W and dries the wafer W by increasing the rotation speed of the wafer W, for example.
- step S108 unloading processing is performed (step S108).
- the wafer W is unloaded from the chamber 201 by the second transfer device 17 , and the wafer W is reversed again by the reversing mechanism 15 .
- the wafer W is taken out from the reversing mechanism 15 by the first transfer device 13 and stored in the cassette C. As shown in FIG. At this time, the wafers W are accommodated in the cassette C with the main surface Wa directed upward.
- the first cleaning process is performed after the polishing process, but the first cleaning process may be performed after the etching process and before the polishing process. Also, the first cleaning process and the second cleaning process may be performed after the etching process and before the polishing process. Also, the first cleaning process and the second cleaning process may be omitted.
- FIG. 10 is a diagram for explaining improvement of the foreign matter removal rate by the substrate processing method according to the embodiment.
- the inventors processed the wafer W by the substrate processing method according to the embodiment, and examined the foreign matter removal rate on the back surface Wb of the wafer W.
- FIG. 10 is a diagram for explaining improvement of the foreign matter removal rate by the substrate processing method according to the embodiment.
- the inventors processed the wafer W by the substrate processing method according to the embodiment, and examined the foreign matter removal rate on the back surface Wb of the wafer W.
- SCR indicates the result (comparative example 1) of performing the first cleaning process and the second cleaning process in order without performing the etching process and the polishing process.
- Polyish+SCR indicates the result (comparative example 2) in which the polishing process, the first cleaning process, and the second cleaning process were performed in order without performing the etching process.
- BSS+Polish+SCR shows the results (Example 1) of sequentially performing the etching process, the polishing process, the first cleaning process, and the second cleaning process like the substrate processing method according to the embodiment.
- BSS+SCR+Polish in FIG. 10 shows the result (Example 2) of performing the polishing treatment, the first cleaning treatment, and the second cleaning treatment in the order of Example 1.
- the substrate processing method according to the embodiment it is possible to appropriately remove foreign substances from the back surface Wb of the wafer W on which the film F is formed, as compared with a method that does not perform an etching process.
- FIG. 11 is a schematic plan view of a substrate processing system 1A according to a modification of the embodiment.
- a substrate processing system 1A of a modified example shown in FIG. 11 includes a first substrate processing system 1A1 for performing an etching process, and a second substrate processing system 1A2 for performing a polishing process, a first cleaning process, and a second cleaning process.
- the first substrate processing system 1A1 includes a loading/unloading station 2, a delivery station 3A1, and a processing station 4A1.
- the loading/unloading station 2 is the same as the loading/unloading station 2 included in the substrate processing system 1 according to the embodiment, and thus description thereof is omitted here.
- a plurality of substrate platforms 14 are arranged inside the delivery station 3A1. Note that unlike the delivery station 3 of the substrate processing system 1 according to the embodiment, the reversing mechanism 15 is not arranged inside the delivery station 3A1.
- the processing station 4A1 includes a first processing station 4U and a second processing station 4L, like the processing station 4 included in the substrate processing system 1 according to the embodiment.
- the first processing station 4U and the second processing station 4L have the same configuration, and include a transport section 16, a second transport device 17, and a plurality of first processing units (CH1) 18.
- the first processing station 4U and the second processing station 4L do not include a plurality of second processing units (CH2) 19. .
- the second substrate processing system 1A2 includes a loading/unloading station 2, a delivery station 3, and a processing station 4A2.
- the loading/unloading station 2 and the delivery station 3 are the same as the loading/unloading station 2 and the delivery station 3 provided in the substrate processing system 1 according to the embodiment, respectively, so descriptions thereof are omitted here.
- the processing station 4A2 includes a first processing station 4U and a second processing station 4L, like the processing station 4 included in the substrate processing system 1 according to the embodiment.
- the first processing station 4 ⁇ /b>U and the second processing station 4 ⁇ /b>L have the same configuration and include a transport section 16 , a second transport device 17 and a plurality of second processing units (CH 2 ) 19 .
- the first processing station 4U and the second processing station 4L do not include a plurality of first processing units (CH1) 18. .
- the first substrate processing system 1A1 also includes a control device 5A1, as shown in FIG.
- the control device 5A1 is, for example, a computer, and includes a control section 6A1 and a storage section 7A1.
- the storage unit 7A1 stores programs for controlling various processes executed in the first substrate processing system 1A1.
- the control unit 6A1 controls the operation of the first substrate processing system 1A1 by reading and executing a program stored in the storage unit 7A1.
- the second substrate processing system 1A2 also includes a control device 5A2, as shown in FIG.
- the control device 5A2 is, for example, a computer, and includes a control section 6A2 and a storage section 7A2.
- the storage unit 7A2 stores programs for controlling various processes executed in the second substrate processing system 1A2.
- the control unit 6A2 controls the operation of the second substrate processing system 1A2 by reading and executing the programs stored in the storage unit 7A2.
- These programs were recorded on a computer-readable storage medium, and were installed from the storage medium into the storage section 7A1 of the control device 5A1 and the storage section 7A2 of the control device 5A2.
- computer-readable storage media include hard disks (HD), flexible disks (FD), compact disks (CD), magnet optical disks (MO), and memory cards.
- the first transfer device 13 of the first substrate processing system 1A1 takes out the wafer W from the cassette C, and transfers the taken out wafer W to the substrate platform of the delivery station 3A1. 14.
- the wafer W placed on the substrate platform 14 is taken out from the substrate platform 14 by the second transfer device 17 of the processing station 4A1 and carried into the first processing unit 18, where it undergoes etching processing. is applied.
- the second transfer device 17 takes out the processed wafer W from the first processing unit 18 and places it on the substrate platform 14 of the transfer station 3A1.
- the wafer W placed on the substrate platform 14 is taken out from the substrate platform 14 and returned to the cassette C by the first transfer device 13 .
- the wafer W returned to the cassette C is transferred from the first substrate processing system 1A1 to the cassette mounting section 11 of the second substrate processing system 1A2.
- the wafer W is taken out from the cassette C by the first transfer device 13 of the second substrate processing system 1A2 and transferred to the reversing mechanism 15 of the transfer station 3.
- the reversing mechanism 15 reverses the wafer W upside down.
- the wafer W whose front and back sides are reversed is taken out from the reversing mechanism 15 by the second transfer device 17 and carried into the second processing unit 19 , where the second processing unit 19 performs polishing processing and cleaning processing.
- the second transport device 17 takes out the processed wafer W from the second processing unit 19 and transports it to the reversing mechanism 15, and the reversing mechanism 15 again reverses the front and back of the wafer W.
- the wafer W whose front and back sides have been reversed again is taken out from the reversing mechanism 15 and returned to the cassette C by the first transfer device 13 .
- the substrate processing method includes an etching process (eg step S102) and a polishing process (eg step S103).
- the etching step the film on the substrate (eg, wafer W) having the film (eg, film F) formed on the back surface (eg, back surface Wb) opposite to the main surface (eg, main surface Wa) is etched.
- the polishing step polishes the back surface of the substrate after the etching step. As a result, foreign matter can be properly removed from the back surface of the substrate on which the film is formed.
- the substrate processing method includes a first cleaning step (for example, the brush 251) of cleaning the back surface of the substrate after the polishing step or after the etching step and before the polishing step.
- a first cleaning step for example, the brush 251 of cleaning the back surface of the substrate after the polishing step or after the etching step and before the polishing step.
- step S104 may be further included.
- shavings of burrs eg, burrs B1 remaining on the back surface of the substrate and particles (eg, particles P1) adhering to the back surface of the substrate can be removed.
- the first cleaning step may clean the back surface of the substrate with a brush while supplying a cleaning liquid (for example, the first cleaning liquid) to the back surface of the substrate.
- a cleaning liquid for example, the first cleaning liquid
- the substrate processing method includes, after the first cleaning step, a second cleaning step (for example, a second cleaning solution) for cleaning the back surface of the substrate by supplying a mist-like cleaning liquid (for example, a second cleaning liquid) to the back surface of the substrate.
- a second cleaning step for example, a second cleaning solution
- a mist-like cleaning liquid for example, a second cleaning liquid
- step S105 may be further included.
- the etching step may etch the film so that the film remains on the back surface of the substrate. As a result, it is possible to prevent the rear surface of the substrate from being damaged in the polishing process that is performed after the etching process.
- the etching step may etch the film by sequentially supplying a plurality of chemical solutions (eg, hydrofluoric acid and SC-1) to the back surface of the substrate.
- a plurality of chemical solutions eg, hydrofluoric acid and SC-1
- the surface layer (for example, silicon nitride film) of the film (for example, multilayer film including silicon nitride film and silicon oxide film) formed on the back surface of the substrate can be selectively etched.
- the film may be a silicon nitride film, a silicon oxide film, or a multilayer film including a silicon nitride film and a silicon oxide film.
- the substrate processing system (eg, substrate processing system 1, 1A) according to the embodiment includes an etching device (eg, first processing unit 18) and a back surface processing device (eg, second processing unit 19).
- the etching apparatus etches a film on a substrate having a film formed on the back surface opposite to the main surface.
- the backside processing apparatus has a polishing mechanism (eg, polishing mechanism 204) that polishes the backside of the substrate after the film is etched. As a result, foreign matter can be properly removed from the back surface of the substrate on which the film is formed.
- the substrate processing system may further include a reversing mechanism (for example, reversing mechanism 15) for reversing the substrate.
- the etching apparatus may etch the film with the main surface of the substrate facing upward.
- the polishing mechanism may polish the back surface of the substrate inverted by the inverting mechanism after the film is etched.
- the inverting mechanism may invert the substrate again after the back surface of the substrate is polished by the polishing mechanism. Thereby, substrate processing can be completed with the main surface of the substrate facing upward.
- the back surface processing apparatus may be the back surface of the substrate after being polished by the polishing mechanism, or the substrate after the film is etched by the etching apparatus and before being polished by the polishing mechanism.
- a cleaning mechanism for example, cleaning mechanism 205 for cleaning the back surface of the substrate with a brush may be provided.
- the substrate processing system may further include a reversing mechanism (for example, reversing mechanism 15) for reversing the substrate.
- the etching apparatus may etch the film with the main surface of the substrate facing upward.
- the polishing mechanism may polish the back surface of the substrate inverted by the inverting mechanism after the film is etched.
- the cleaning mechanism may clean the back surface of the substrate after being polished by the polishing mechanism.
- the inversion mechanism may invert the substrate again after the back surface of the substrate has been cleaned by the cleaning mechanism. Thereby, substrate processing can be completed with the main surface of the substrate facing upward.
Landscapes
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Physics & Mathematics (AREA)
- Manufacturing & Machinery (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Mechanical Treatment Of Semiconductor (AREA)
Abstract
Description
最初に、図1及び図2を参照しながら、実施形態に係る基板処理システム1の構成について説明する。図1は、実施形態に係る基板処理システム1の模式平面図である。図2は、実施形態に係る基板処理システム1の模式側面図である。なお、以下では、位置関係を明確にするために、互いに直交するX軸、Y軸及びZ軸を規定し、Z軸正方向を鉛直上向き方向とする。
図3は、実施形態に係るウェハWの構成を示す図である。図3に示すウェハWは、例えば、シリコンウェハ等であり、主面Waには、パターンが形成され、主面Waとは反対側の裏面Wbには、シリコン酸化膜F1とシリコン窒化膜F2とが積層された多層膜である膜Fが形成されている。なお、図2では、説明の便宜上、ウェハWの主面Waに形成されたパターンは、省略されている。
次に、実施形態に係る第1処理ユニット18の構成について、図4を参照しながら説明する。図4は、実施形態に係る第1処理ユニット18の模式図である。図4に示すように、第1処理ユニット18は、チャンバ21と、基板保持部22と、処理液供給部23と、回収カップ24とを備える。
次に、実施形態に係る第2処理ユニット19の構成について、図5及び図6を参照しながら説明する。図5は、実施形態に係る第2処理ユニット19の模式平面図である。また、図6は、実施形態に係る第2処理ユニット19の模式側面図である。
次に、実施形態に係る基板処理システム1の具体的動作について説明する。図7は、実施形態に係る基板処理システム1が実行する基板処理の手順を示すフローチャートである。また、図8A及び図8Bは、第1処理ユニット18の動作の一例を説明する図であり、図9A~図9Dは、第2処理ユニット19の動作の一例を説明する図である。より詳細には、図8A及び図8Bでは、図7におけるエッチング処理(ステップS102)の動作例を示している。図9A及び図9Bでは、図7における研磨処理(ステップS103)の動作例を示している。図9Cでは、図7における第1洗浄処理(ステップS104)の動作例を示し、図9Dでは、図7における第2洗浄処理(ステップS105)の動作例を示している。なお、図7に示す各処理手順は、制御装置5の制御に基づいて行われる。
図10は、実施形態に係る基板処理方法による異物除去率の改善について説明するための図である。本発明者らは、実施形態に係る基板処理方法でウェハWを処理し、ウェハWの裏面Wbにおける異物除去率を調べた。
基板処理システムの構成は、実施形態において示した構成に限定されない。そこで、以下では、実施形態の変形例に係る基板処理システムの構成について図11を参照して説明する。図11は、実施形態の変形例に係る基板処理システム1Aの模式平面図である。
実施形態に係る基板処理方法は、エッチング工程(例えば、ステップS102)と、研磨工程(例えば、ステップS103)とを含む。エッチング工程は、主面(例えば、主面Wa)とは反対側の裏面(例えば、裏面Wb)に膜(例えば、膜F)が形成された基板(例えば、ウェハW)における膜をエッチングする。研磨工程は、エッチング工程の後に、基板の裏面を研磨する。これにより、基板の膜が形成された裏面から異物を適切に除去することができる。
15 反転機構
18 第1処理ユニット
19 第2処理ユニット
23 処理液供給部
204 研磨機構
205 洗浄機構
206 第1供給部
207 第2供給部
241 研磨ブラシ
251 ブラシ
F 膜
W ウェハ
Wa 主面
Wb 裏面
Claims (11)
- 主面とは反対側の裏面に膜が形成された基板における前記膜をエッチングするエッチング工程と、
前記エッチング工程の後に、前記基板の前記裏面を研磨する研磨工程と
を含む、基板処理方法。 - 前記研磨工程の後に、又は、前記エッチング工程の後で且つ前記研磨工程の前に、前記基板の前記裏面をブラシにより洗浄する第1洗浄工程をさらに含む、請求項1に記載の基板処理方法。
- 前記第1洗浄工程は、前記基板の前記裏面に対して洗浄液を供給しながら、前記基板の前記裏面をブラシにより洗浄する、請求項2に記載の基板処理方法。
- 前記第1洗浄工程の後に、ミスト化した洗浄液を前記基板の前記裏面に供給することにより、前記基板の裏面を洗浄する第2洗浄工程をさらに含む、請求項2又は3に記載の基板処理方法。
- 前記エッチング工程は、前記基板の前記裏面に前記膜が残るように前記膜をエッチングする、請求項1~4のいずれか一つに記載の基板処理方法。
- 前記エッチング工程は、
前記基板の前記裏面に複数の薬液を順次供給することにより、前記膜をエッチングする、請求項1~5のいずれか一つに記載の基板処理方法。 - 前記膜は、シリコン窒化膜、シリコン酸化膜、又は、シリコン窒化膜とシリコン酸化膜とを含む多層膜である、請求項1~6のいずれか一つに記載の基板処理方法。
- 主面とは反対側の裏面に膜が形成された基板における前記膜をエッチングするエッチング装置と、
前記膜がエッチングされた後に、前記基板の前記裏面を研磨する研磨機構を有する裏面処理装置と
を備える、基板処理システム。 - 基板を反転させる反転機構をさらに備え、
前記エッチング装置は、
前記基板の前記主面が上方に向けられた状態で前記膜をエッチングし、
前記研磨機構は、
前記膜がエッチングされた後に、前記反転機構によって反転された前記基板の前記裏面を研磨し、
前記反転機構は、
前記研磨機構によって前記基板の前記裏面が研磨された後に、前記基板を再度反転させる、請求項8に記載の基板処理システム。 - 前記裏面処理装置は、
前記研磨機構によって研磨された後の前記基板の前記裏面、又は、前記エッチング装置によって前記膜がエッチングされた後で且つ前記研磨機構によって研磨される前の前記基板の前記裏面をブラシにより洗浄する洗浄機構をさらに有する、請求項8に記載の基板処理システム。 - 基板を反転させる反転機構をさらに備え、
前記エッチング装置は、
前記基板の前記主面が上方に向けられた状態で前記膜をエッチングし、
前記研磨機構は、
前記膜がエッチングされた後に、前記反転機構によって反転された前記基板の前記裏面を研磨し、
前記洗浄機構は、
前記研磨機構によって研磨された後の前記基板の前記裏面を洗浄し、
前記反転機構は、
前記洗浄機構によって前記基板の前記裏面が洗浄された後に、前記基板を再度反転させる、請求項10に記載の基板処理システム。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020237032299A KR20230150327A (ko) | 2021-03-03 | 2022-02-17 | 기판 처리 방법 및 기판 처리 시스템 |
JP2023503704A JPWO2022185929A1 (ja) | 2021-03-03 | 2022-02-17 | |
CN202280017172.2A CN116888713A (zh) | 2021-03-03 | 2022-02-17 | 基板处理方法和基板处理系统 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-033510 | 2021-03-03 | ||
JP2021033510 | 2021-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022185929A1 true WO2022185929A1 (ja) | 2022-09-09 |
Family
ID=83154060
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/006285 WO2022185929A1 (ja) | 2021-03-03 | 2022-02-17 | 基板処理方法及び基板処理システム |
Country Status (5)
Country | Link |
---|---|
JP (1) | JPWO2022185929A1 (ja) |
KR (1) | KR20230150327A (ja) |
CN (1) | CN116888713A (ja) |
TW (1) | TW202249100A (ja) |
WO (1) | WO2022185929A1 (ja) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004071836A (ja) * | 2002-08-06 | 2004-03-04 | Sumitomo Mitsubishi Silicon Corp | 半導体基板の製造方法 |
JP2015070015A (ja) * | 2013-09-27 | 2015-04-13 | 株式会社Screenホールディングス | 基板処理装置および基板処理方法 |
JP2016197762A (ja) * | 2016-08-30 | 2016-11-24 | 東京エレクトロン株式会社 | 基板洗浄方法および基板洗浄システム |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5705666B2 (ja) | 2011-07-07 | 2015-04-22 | 東京エレクトロン株式会社 | 基板処理方法、基板処理システム及び基板処理プログラムを記憶したコンピュータ読み取り可能な記憶媒体 |
-
2022
- 2022-02-17 KR KR1020237032299A patent/KR20230150327A/ko unknown
- 2022-02-17 CN CN202280017172.2A patent/CN116888713A/zh active Pending
- 2022-02-17 JP JP2023503704A patent/JPWO2022185929A1/ja active Pending
- 2022-02-17 WO PCT/JP2022/006285 patent/WO2022185929A1/ja active Application Filing
- 2022-02-18 TW TW111105903A patent/TW202249100A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2004071836A (ja) * | 2002-08-06 | 2004-03-04 | Sumitomo Mitsubishi Silicon Corp | 半導体基板の製造方法 |
JP2015070015A (ja) * | 2013-09-27 | 2015-04-13 | 株式会社Screenホールディングス | 基板処理装置および基板処理方法 |
JP2016197762A (ja) * | 2016-08-30 | 2016-11-24 | 東京エレクトロン株式会社 | 基板洗浄方法および基板洗浄システム |
Also Published As
Publication number | Publication date |
---|---|
CN116888713A (zh) | 2023-10-13 |
TW202249100A (zh) | 2022-12-16 |
JPWO2022185929A1 (ja) | 2022-09-09 |
KR20230150327A (ko) | 2023-10-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN108789132B (zh) | 基板清洗方法 | |
JP6093328B2 (ja) | 基板処理システム、基板処理方法、プログラム及びコンピュータ記憶媒体 | |
JP6425639B2 (ja) | 基板処理システム | |
KR20010098930A (ko) | 회전유지장치 및 반도체기판처리장치 | |
US5954888A (en) | Post-CMP wet-HF cleaning station | |
JP2001035821A (ja) | 基板の研磨方法及び装置 | |
JP2003502840A (ja) | 半導体ウェハを洗浄するための方法及びシステム | |
JP6587379B2 (ja) | 研磨装置 | |
JP2015035582A (ja) | 成膜システム | |
TWI833007B (zh) | 基板處理方法及基板處理裝置 | |
JP3413726B2 (ja) | ウエハ洗浄方法 | |
JP7292107B2 (ja) | 基板処理方法および基板処理装置 | |
WO2022185929A1 (ja) | 基板処理方法及び基板処理システム | |
WO2023136200A1 (ja) | 基板処理方法および基板処理装置 | |
JP3838946B2 (ja) | 基板処理装置及び基板処理方法 | |
KR20110064608A (ko) | 스핀 스크러버에 의한 반도체 웨이퍼의 세정 장치 및 이를 이용한 세정 방법 | |
JP2018129476A (ja) | 基板処理装置 | |
JP2000208466A (ja) | 基板処理方法および基板処理装置 | |
JPH10303170A (ja) | 基板洗浄装置および基板洗浄方法 | |
JP7418261B2 (ja) | 基板処理方法および基板処理装置 | |
US20240004301A1 (en) | Substrate processing apparatus, substrate processing method, and recording medium | |
JP2024079047A (ja) | 基板処理装置および基板処理方法 | |
JP7159456B2 (ja) | 基板処理方法及び基板処理装置 | |
WO2024029579A1 (ja) | めっき処理方法およびめっき処理装置 | |
JP2023171224A (ja) | 基板処理装置、基板処理方法、及び、記憶媒体 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22762985 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280017172.2 Country of ref document: CN Ref document number: 2023503704 Country of ref document: JP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18459913 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20237032299 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 22762985 Country of ref document: EP Kind code of ref document: A1 |