WO2010104207A1 - 基板洗浄方法 - Google Patents
基板洗浄方法 Download PDFInfo
- Publication number
- WO2010104207A1 WO2010104207A1 PCT/JP2010/054482 JP2010054482W WO2010104207A1 WO 2010104207 A1 WO2010104207 A1 WO 2010104207A1 JP 2010054482 W JP2010054482 W JP 2010054482W WO 2010104207 A1 WO2010104207 A1 WO 2010104207A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- cleaning
- wafer
- discharge electrode
- aerosol
- Prior art date
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- 238000004140 cleaning Methods 0.000 title claims abstract description 144
- 239000000758 substrate Substances 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 77
- 239000000443 aerosol Substances 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000005507 spraying Methods 0.000 claims abstract description 7
- 239000010419 fine particle Substances 0.000 claims description 46
- 238000012545 processing Methods 0.000 claims description 45
- 239000007788 liquid Substances 0.000 claims description 36
- 239000007787 solid Substances 0.000 claims description 23
- 238000001816 cooling Methods 0.000 claims description 12
- 238000009833 condensation Methods 0.000 claims description 6
- 230000005494 condensation Effects 0.000 claims description 6
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000001704 evaporation Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 abstract description 15
- 235000012431 wafers Nutrition 0.000 description 99
- 230000008569 process Effects 0.000 description 45
- 230000007246 mechanism Effects 0.000 description 18
- 238000012546 transfer Methods 0.000 description 18
- 230000006870 function Effects 0.000 description 13
- 239000004065 semiconductor Substances 0.000 description 11
- 230000003068 static effect Effects 0.000 description 8
- 150000002500 ions Chemical class 0.000 description 7
- 239000000126 substance Substances 0.000 description 7
- 238000003860 storage Methods 0.000 description 6
- 230000008030 elimination Effects 0.000 description 5
- 238000003379 elimination reaction Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000005530 etching Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000011086 high cleaning Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000007590 electrostatic spraying Methods 0.000 description 2
- 239000004973 liquid crystal related substance Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000004931 aggregating effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- GDTBXPJZTBHREO-UHFFFAOYSA-N bromine Substances BrBr GDTBXPJZTBHREO-UHFFFAOYSA-N 0.000 description 1
- 229910052794 bromium Inorganic materials 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003472 neutralizing effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010407 vacuum cleaning Methods 0.000 description 1
- 229910052727 yttrium Inorganic materials 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
- H01L21/67—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
-
- 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
Definitions
- the present invention relates to a method for cleaning a substrate on which a fine pattern is formed.
- a foreign substance, a by-product, or an unnecessary film (hereinafter referred to as “foreign substance”) on the semiconductor substrate is removed after the semiconductor substrate is subjected to processing such as etching or film formation.
- a cleaning process is being performed.
- the cleaning process is performed by immersing the semiconductor substrate in the cleaning liquid or spraying the cleaning liquid while rotating the semiconductor substrate, and then performing a rinsing process for removing the cleaning liquid and a drying process for removing the rinsing liquid. The method is used.
- the nozzle that generates the aerosol is insulated and the pressure inside the nozzle is set high to change the nozzle interior from a liquid-rich state to a gas-rich state.
- Patent Document 2 proposes a method of preventing damage to the fine structure of an object to be cleaned by reducing the aerosol aggregating action during adiabatic expansion when blowing out the aerosol.
- the chamber is adjusted to a pressure of several kPa to generate a downward flow in the chamber.
- a cleaning method has been proposed in which a gas viscous flow is generated from gas or the like vaporized from aerosol by injecting gas containing aerosol from a Laval nozzle (see, for example, Patent Document 3).
- the aerosol cleaning method disclosed in Patent Document 1 requires a very high-speed aerosol to be sprayed on the substrate, and thus has a problem that the apparatus becomes large and complicated, and a fine pattern is destroyed. Further, in the aerosol cleaning method disclosed in Patent Document 2, it is necessary to maintain the cleaning chamber in a vacuum, that is, it takes a certain time for pressure reduction / pressure increase, and thus it is difficult to increase the throughput. Furthermore, the nano-aerosol cleaning method disclosed in Patent Document 3 aims at cleaning the back surface of the substrate, and the effect on cleaning the surface on which the fine pattern is formed is uncertain.
- An object of the present invention is to provide a substrate cleaning method for cleaning a substrate on which a fine pattern is formed in a short time without adversely affecting the fine pattern.
- a substrate cleaning method for cleaning a substrate on which a fine pattern having grooves or holes having a representative length of 0.1 ⁇ m or less is formed.
- the substrate is placed in a space containing moisture so as to face the tip of the coolable discharge electrode having an acute tip with a fixed interval across the counter electrode arranged at a predetermined position.
- a substrate cleaning method of cleaning the substrate by generating an aerosol containing water fine particles having a diameter of 10 nm or less at the tip portion of the discharge electrode and spraying the aerosol on the substrate.
- annular electrode installed so that each part maintains an equal distance from the tip of the discharge electrode as the counter electrode.
- a negative voltage is applied to the discharge electrode to positively charge the substrate in the cleaning step.
- the substrate is irradiated with soft X-rays or light that ionizes gas molecules in a processing atmosphere after the substrate placement step and before the cleaning step or in the cleaning step. .
- a substrate cleaning method for cleaning a substrate on which a fine pattern having grooves or holes having a representative length of 0.1 ⁇ m or less is formed.
- a substrate cleaning method for spraying and cleaning the substrate is provided.
- a sol containing solid fine particles having a diameter of 10 nm or less as the cleaning liquid.
- the solid fine particles are jetted onto the substrate by evaporating moisture from the aerosol before the aerosol reaches the substrate.
- the substrate is irradiated with soft X-rays or light that ionizes gas molecules in a processing atmosphere after the substrate placement step and before the cleaning step or in the cleaning step. .
- foreign substances and the like can be removed from a substrate on which a fine pattern is formed without causing pattern collapse.
- the aerosol can be substantially uniformly diffused to perform a uniform cleaning process on the entire substrate.
- the fine particles contained in the aerosol can be accelerated toward the substrate, the cleaning power can be increased, and an efficient cleaning process can be performed.
- foreign substances and the like can be removed from the substrate without causing pattern collapse on the substrate on which the fine pattern is formed.
- the cleaning effect by the liquid fine particles and the solid fine particles can be obtained at the same time, and high cleaning ability can be obtained.
- the substrate can be cleaned with a high cleaning power by the solid fine particles.
- FIG. 1 is a plan view schematically showing the structure of a substrate processing system to which a substrate cleaning method according to the present invention is applied. It is sectional drawing which shows schematically the structure of the washing
- a substrate cleaning method according to the present invention will be described using a substrate processing system that performs an etching process on a semiconductor wafer (hereinafter referred to as “wafer”) as a substrate.
- wafer semiconductor wafer
- FIG. 1 is a plan view schematically showing the structure of a substrate processing system to which a substrate cleaning method according to the present invention is applied.
- the substrate processing system 10 includes two process ships 11 that perform RIE (anisotropic etching) processing on a wafer W, and an atmospheric transfer chamber (hereinafter referred to as a rectangular common transfer chamber) to which the process ships 11 are connected. (Referred to as a “loader module”) 13.
- RIE anisotropic etching
- the loader module 13 includes, for example, three hoop mounting tables 15 on which hoops 14 serving as storage containers for storing 25 wafers W are respectively mounted, and an orienter for prealigning the position of the wafer W carried out of the hoops 14. 16 is connected to a cleaning unit 17A that performs cleaning processing of the wafer W that has been subjected to RIE processing, and a wafer reversing unit 12 that performs reversal processing of the front surface / back surface of the wafer W.
- the two process ships 11 are connected to the side wall in the longitudinal direction of the loader module 13 and are disposed so as to face the three hoop mounting tables 15 with the loader module 13 interposed therebetween.
- the wafer reversing unit 12 is arranged side by side with the hoop mounting table 15.
- the orienter 16 is disposed at one end of the loader module 13 in the longitudinal direction, and the cleaning unit 17A is disposed at the other end of the loader module 13 in the longitudinal direction.
- the cleaning process is performed with the surface of the wafer W (the surface on which the fine pattern is formed) facing downward.
- the wafer reversing unit 12 reverses the wafer W in order to carry the wafer W into the cleaning unit 17A and return the wafer W that has undergone the cleaning process in the cleaning unit 17A to the FOUP 14.
- a SCARA-type dual arm type transfer arm mechanism 19 for transferring the wafer W is disposed.
- load ports 18 are provided on the side walls of the loader module 13 at positions corresponding to the positions of the wafer reversing unit 12 and the cleaning unit 17A, respectively.
- the transfer arm mechanism 19 takes out the wafer W from the hoop 14 placed on the hoop placement table 15 via the load port 20, and removes the taken wafer W from the process ship 11, the orienter 16, and the wafer reversing unit 12. Then, carry in / out the cleaning unit 17A.
- the process ship 11 includes a process module 25 serving as a vacuum processing chamber for performing RIE processing on the wafer W, and a load / lock module 27 including a link type single pick type transfer arm 26 that delivers the wafer W to the process module 25. I have.
- the cylindrical chamber for accommodating the wafer W the wafer stage disposed in the chamber for placing the wafer W, and the upper surface of the wafer stage at a constant interval.
- the wafer stage has both a function of chucking the wafer W by a Coulomb force and the like and a function as a lower electrode, and the interval between the upper electrode and the wafer stage is set to an appropriate distance for performing an RIE process on the wafer W. Yes.
- a processing gas such as a fluorine gas or a bromine gas is introduced into the chamber, and an electric field is generated between the upper electrode and the lower electrode, and the introduced processing gas is turned into plasma to generate ions and radicals. Then, RIE processing is performed on the wafer W by the ions and radicals. For example, a polysilicon layer formed on the surface of the wafer W is etched to form a fine pattern.
- the load lock module 27 includes a vacuum gate valve 29 at the connection portion with the process module 25 and an atmospheric gate valve 30 at the connection portion with the loader module 13, thereby reducing the internal pressure of the load lock module 27 from the vacuum environment. It can be adjusted with the atmospheric pressure environment.
- the transfer arm 26 is installed at a substantially central portion, and a first buffer 31 is installed on the process module 25 side, and a second buffer 32 is installed on the loader module 13 side.
- the first buffer 31 and the second buffer 32 are arranged on a trajectory along which a pick 33 for supporting the wafer W arranged at the tip of the transfer arm 26 moves.
- an operation controller 40 for controlling the operations of the process ship 11, the loader module 13, the orienter 16, and the cleaning unit 17A is disposed at one end of the loader module 13 in the longitudinal direction. That is, the operation controller 40 executes a program corresponding to the RIE process, the cleaning process, and the transfer process of the wafer W in accordance with a predetermined recipe. In this way, the operation of various operating elements constituting the substrate processing system 10 is controlled.
- the operation controller 40 has a display unit (not shown) such as an LCD (Liquid Crystal Display), for example, so that the user can check recipes and the operating status of various operating elements. It has become.
- the load port 20 is opened, and the transfer arm mechanism 19 causes the wafer W to be removed from the hoop 14. Is taken out and the wafer W is loaded into the orienter 16.
- the wafer W whose position has been aligned in the orienter 16 is taken out of the orienter 16 by the transfer arm mechanism 19 and is maintained in an atmospheric pressure environment via the atmospheric gate valve 30 of one process ship 11. 27 is transferred to the transfer arm 26 in the terminal 27.
- the vacuum gate valve 29 is opened and the wafer W is loaded into the process module 25.
- the vacuum gate valve 29 is closed and the RIE process is performed in the process module 25, the vacuum gate valve 29 is opened, and the wafer W is unloaded from the process module 25 by the transfer arm 26 in the load lock module 27.
- the transfer arm mechanism 19 carries the wafer W held through the load port 20 into the wafer reversing unit 12 where the wafer W is reversed.
- the transfer arm mechanism 19 takes out the wafer W from the wafer reversing unit 12 and loads it into the cleaning unit 17A, where the wafer W is cleaned. The specific contents of this cleaning process will be described in detail later.
- the wafer W that has been subjected to the cleaning process is unloaded from the cleaning unit 17A by the transfer arm mechanism 19 and loaded into the wafer reversing unit 12. After the reversing process, the wafer W is again taken out from the wafer reversing unit 12 by the transfer arm mechanism 19. Housed in a predetermined hoop 14.
- FIG. 2 is a cross-sectional view schematically showing the structure of the cleaning unit shown in FIG.
- the cleaning unit 17A includes a holding member 42 for holding the wafer W and a wafer W held by the holding member 42 in a chamber 41 in which the inside is maintained in a space containing a certain amount of moisture (water vapor).
- a nanoaerosol generator for spraying nanoaerosol containing water fine particles 80 is arranged.
- a humidity sensor is arranged in the chamber 41, and water vapor is supplied so that the humidity detected by the humidity sensor becomes a constant value.
- Nanoaerosol herein refers to a gas containing nano-order liquid particles and / or solid particles in a gas.
- the nano-aerosol generator has a discharge electrode 45 having an acute-angled tip, a cooling mechanism 44 for cooling the discharge electrode 45, and a heat generated in the process of generating cooling in the cooling mechanism 44 while holding the cooling mechanism 44.
- a radiation fin 43 that dissipates, and a counter electrode 46 that is arranged at regular intervals from the tip of the discharge electrode 45 are provided.
- a constant voltage is applied to the discharge electrode 45 and the counter electrode 46 from a DC power supply 47. It has become.
- the wafer W is held by the holding member 42 so that the surface thereof faces downward and faces the front end of the discharge electrode 45 with the counter electrode 46 interposed therebetween at a constant interval.
- the holding member 42 preferably includes an electrode that functions to positively charge the wafer W.
- the tip of the discharge electrode 45 has, for example, a substantially conical shape, and when the apex angle is ⁇ , 2 ⁇ is an acute angle (2 ⁇ ⁇ 90 °).
- a Peltier element or the like can be used for the cooling mechanism 44.
- the heat radiating fins 43 are disposed in the chamber 41 in FIG. 2, a portion that holds the cooling mechanism 44 is disposed in the chamber 41 and a plurality of fins that effectively radiate heat are disposed outside the chamber 41. You may arrange.
- an annular electrode is used as the counter electrode 46, and each part thereof is disposed so as to keep an equal distance from the tip of the discharge electrode 45 (the discharge electrode 45 is arranged on the center axis of the ring). It is preferred that the tip is located).
- the water fine particles 80 are sprayed in a regular conical shape from the tip of the discharge electrode 45, and the water fine particles 80 can easily collide with the wafer W uniformly.
- the generation of the aerosol containing the water fine particles 80 by the nano-aerosol generator is performed as follows. That is, since a certain amount of water vapor is present in the chamber 41, the cooling mechanism 44 cools the discharge electrode 45 to a temperature at which condensation occurs on the discharge electrode 45. That is, the atmosphere in the chamber 41 is a water supply source to the discharge electrode 45. When a voltage is applied so that a potential difference of, for example, about 5 kV is generated between the discharge electrode 45 and the counter electrode 46 so that the discharge electrode 45 is at a negative potential and the counter electrode 46 is at the ground potential, condensation occurs on the discharge electrode 45.
- FIG. 3 is a scatter diagram (graph) showing the result of measuring the particle size distribution of water fine particles contained in the nano aerosol generated by the nano aerosol generator shown in FIG. 2 by the CNC (condensation new creation counter) method. is there.
- FIG. 3 confirms that water fine particles 80 having a particle size of 10 nm or less can be generated efficiently, which indicates that excellent cleaning performance can be obtained.
- the wafer W on which a fine pattern having a groove or a hole having a representative length of 0.1 ⁇ m or less is formed is a main processing target. This is because, in the case of a semiconductor wafer on which a fine pattern having a representative length exceeding 0.1 ⁇ m is formed, it is possible to use a cleaning process by a conventional immersion process in a cleaning liquid or the like.
- the wafer W whose surface is directed downward is carried into the chamber 41 and held by the holding member 42 (substrate placement step).
- the discharge electrode 45 is cooled to cause condensation on the discharge electrode 45, and a constant voltage is applied between the discharge electrode 45 and the counter electrode 46, and water having a diameter of 10 nm or less is applied to the tip of the discharge electrode 45.
- An aerosol containing the fine particles 80 is generated, and the aerosol is sprayed on the wafer W (cleaning step).
- the water fine particles 80 enter and collide with the concave portions such as grooves and holes of the fine pattern, so that foreign matters and the like attached to the concave portions can be removed.
- the water fine particles 80 can be accelerated toward the wafer W, thereby increasing the cleaning power and cleaning efficiency.
- the temperature of the wafer W, the humidity in the vicinity of the surface of the wafer W, and the spray amount of the water fine particles 80 are determined so that a water film is not formed on the surface of the wafer W and is immediately dried.
- FIG. 4 is a plan view schematically showing the structure of a second substrate processing system to which the substrate cleaning method according to the present invention is applied.
- the substrate processing system 10A is different from the substrate processing system 10 shown in FIG. 1 in that a cleaning unit 17B is disposed in place of the cleaning unit 17A.
- a cleaning unit 17B is disposed in place of the cleaning unit 17A.
- a wafer is processed. Since the cleaning process is performed with the front surface of W being the upper side and the back surface being the lower side, it is not necessary to reverse the wafer W, and therefore the wafer reversing unit 12 is not provided. Therefore, the cleaning unit 17B will be described in detail below.
- FIG. 5 is a cross-sectional view schematically showing the configuration of the cleaning unit shown in FIG.
- the cleaning unit 17B includes a stage 52 on which the wafer W is placed in a chamber 51 that accommodates the wafer W, a hollow needle-like syringe nozzle 53 that is disposed above the stage 52, and a syringe nozzle 53.
- a heater 58 heating mechanism provided between the stage 52 and the syringe nozzle 53 is provided.
- a predetermined voltage can be applied between the stage 52 and the syringe nozzle 53 by a DC power source 57.
- the syringe nozzle 53 is connected to a cleaning liquid supply line 54 for supplying a cleaning liquid from a cleaning liquid supply source 55, and supply / stop of the cleaning liquid is controlled by opening and closing a valve 56.
- the cleaning liquid supply source 55 can appropriately select one used as a cleaning liquid from pure water, chemical liquid, sol containing solid fine particles, and the like.
- the solid fine particles for example, Si, SiO 2 , Al, Al 2 O 3 , Y, Y 2 O 3 , C—F-based polymer and the like can be used, and the particle size thereof is 10 nm or less, preferably 5 nm or less. is there.
- the cleaning unit 17A causes fine particles to form.
- the nano-aerosol containing cleaning liquid fine particles 90 having a particle size of 10 nm or less as a main component is generated by the same mechanism as that for generating water (electrostatic spraying), and this nano-aerosol is transferred from the tip of the syringe nozzle 53 to the wafer W. Can be sprayed toward the surface of At this time, the particle size of the cleaning liquid fine particles 90 can be adjusted by the voltage applied by the DC power source 57.
- the stage 52 is used as a counter electrode with respect to the syringe nozzle 53 functioning as a discharge electrode.
- a counter electrode is provided between the syringe nozzle 53 and the wafer W and generated.
- a function for charging the wafer W with a predetermined charge may be imparted to the stage 52 so that the nano aerosol is accelerated toward the wafer W.
- fine particles made of only solid fine particles can be generated by heating the fine particles generated by the heater 58 and evaporating the solvent component. It is also preferable to clean the wafer W by causing only the solid fine particles to collide with the wafer W in this way because high cleaning power can be obtained.
- the particle size of the solid fine particles is set to 10 nm or less, and the momentum when colliding with the wafer W is reduced, so that the particles adhered to the fine pattern without destroying the fine pattern on the surface of the wafer W. Can be removed.
- the discharge electrode 45 is made into a thin needle electrode and deformed into a structure that does not cool.
- the cleaning liquid or sol is not supplied to the syringe nozzle 53. 53 is deformed into a thin needle electrode.
- the back side of the wafer W is used as a method for removing the solid fine particles from the wafer W.
- the back side of the wafer W is used as a method for removing the solid fine particles from the wafer W.
- ions are generated by decomposing molecules in the atmosphere using weak soft X-rays. Thereby, in the area
- the process module 25 that performs the RIE process on the wafer W is taken up, the process module may perform a film forming process or a diffusion process on the wafer W.
- the substrate processing system 10 is configured by connecting the cleaning unit 17A to an apparatus that performs RIE processing.
- the cleaning unit 17A can be connected to various processing apparatuses that perform RIE processing, film formation processing, diffusion processing, and the like, it can be easily applied to existing processing apparatuses.
- the cleaning unit 17A can be used as an independent cleaning processing apparatus without being connected to these processing apparatuses.
- a semiconductor wafer is taken up as a substrate.
- the substrate is not limited to this, and an FPD (Flat Panel Display) substrate such as an LCD (Liquid Crystal Display), a photomask, a CD substrate, a printed substrate, etc.
- FPD Full Panel Display
- LCD Liquid Crystal Display
- a photomask a CD substrate
- a printed substrate etc.
- Various substrates may be used.
- An object of the present invention is to supply a computer (for example, a control unit) to a computer (for example, a control unit) a storage medium in which the operation controller 40 records software program codes for realizing the functions of the above-described embodiments. It is also achieved by reading out and executing the program code stored in.
- the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the program code and the storage medium storing the program code constitute the present invention.
- a storage medium for supplying the program code for example, RAM, NV-RAM, floppy (registered trademark) disk, hard disk, magneto-optical disk, CD-ROM, CD-R, CD-RW, DVD (DVD-ROM) , DVD-RAM, DVD-RW, DVD + RW) or the like optical disk, magnetic tape, nonvolatile memory card, other ROM, etc., as long as they can store the program code.
- the program code may be supplied to the computer by downloading from another computer or database (not shown) connected to the Internet, a commercial network, a local area network, or the like.
- the function expansion is performed based on the instruction of the program code.
- the form of the program code may be in the form of object code, program code executed by an interpreter, script data supplied to the OS, and the like.
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- Condensed Matter Physics & Semiconductors (AREA)
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Abstract
Description
12 ウエハ反転ユニット
13 ローダーモジュール
17A,17B 洗浄ユニット
25 プロセスモジュール
27 ロード・ロックモジュール
40 オペレーションコントローラ
41 チャンバ
42 保持部材
43 放熱フィン
44 冷却機構
45 放電電極
46 対向電極
47 直流電源
51 チャンバ
52 ステージ
53 シリンジノズル
54 洗浄液供給ライン
55 洗浄液供給源
56 バルブ
57 直流電源
58 ヒータ
80 水微粒子
90 洗浄液微粒子
W (半導体)ウエハ
Claims (7)
- 代表長が0.1μm以下の溝又は穴を有する微細パターンが形成された基板を洗浄するための基板洗浄方法であって、
水分を含んだ空間において、所定位置に配置された対向電極を挟んで、鋭角状の先端部を有する冷却自在の放電電極の前記先端部に対して一定間隔で対面するように、前記基板を配置する基板配置ステップと、
前記放電電極を冷却して前記放電電極に結露を生じさせると共に、前記放電電極と前記対向電極との間に一定電圧を印加する洗浄ステップと、を有し、
前記洗浄ステップでは、前記放電電極の前記先端部で直径が10nm以下の水微粒子を含有するエアロゾルを発生させ、前記エアロゾルを前記基板に噴霧することにより前記基板を洗浄することを特徴とする基板洗浄方法。 - 前記対向電極として、各部位が前記放電電極の先端から均等な距離を保つように設置された円環状電極を用いることを特徴とする請求項1記載の基板洗浄方法。
- 前記洗浄ステップにおいて、前記放電電極に負電圧を印加し、前記基板を正帯電させることを特徴とする請求項1記載の基板洗浄方法。
- 代表長が0.1μm以下の溝又は穴を有する微細パターンが形成された基板を洗浄するための基板洗浄方法であって、
前記基板を、鋭角状の先端部を有する中空針状の放電電極の前記先端部に対して一定間隔で対面するように配置する基板配置ステップと、
前記放電電極へ洗浄液を供給すると共に、前記放電電極と前記基板との間に一定電圧を印加する洗浄ステップと、を有し、
前記洗浄ステップでは、前記先端部に直径が10nm以下の前記洗浄液のエアロゾルを生成させ、前記エアロゾルを前記基板に噴霧して前記基板を洗浄することを特徴とする基板洗浄方法。 - 前記洗浄液として、直径10nm以下の固体微粒子を含有するゾルを用いることを特徴とする請求項4記載の基板洗浄方法。
- 前記エアロゾルが前記基板に到達するまでに前記エアロゾルから水分を蒸発させることにより、前記固体微粒子を前記基板に噴射することを特徴とする請求項4記載の基板洗浄方法。
- 前記基板配置ステップの後であって前記洗浄ステップの前に、又は、前記洗浄ステップにおいて、処理雰囲気中のガス分子をイオン化させる軟X線又は光を前記基板に照射することを特徴とする請求項1又は4記載の基板洗浄方法。
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TWI833514B (zh) * | 2021-12-24 | 2024-02-21 | 南韓商細美事有限公司 | 用於處理基板之設備及方法 |
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JP5783971B2 (ja) * | 2012-08-10 | 2015-09-24 | 株式会社東芝 | 塗布装置および塗布方法 |
KR20160039957A (ko) * | 2014-10-02 | 2016-04-12 | 삼성전자주식회사 | 이온 발생기를 갖는 기판 이송 시스템 |
KR20160065226A (ko) | 2014-11-07 | 2016-06-09 | 세메스 주식회사 | 기판 처리 장치 및 기판 처리 방법 |
CN107924795B (zh) * | 2015-08-20 | 2019-10-18 | 株式会社日立高新技术 | 离子束装置以及气体场致发射离子源的清洗方法 |
JP6764288B2 (ja) * | 2016-09-12 | 2020-09-30 | 株式会社Screenホールディングス | 基板処理方法および基板処理装置 |
JP6843089B2 (ja) * | 2018-04-09 | 2021-03-17 | 東京エレクトロン株式会社 | 結露防止方法および処理装置 |
JP7134863B2 (ja) * | 2018-12-27 | 2022-09-12 | 東京エレクトロン株式会社 | プラズマ処理装置およびプラズマ処理方法 |
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