WO2005059976A1 - 基板処理方法、基板処理装置およびコンピュータ読み取り可能な記録媒体 - Google Patents
基板処理方法、基板処理装置およびコンピュータ読み取り可能な記録媒体 Download PDFInfo
- Publication number
- WO2005059976A1 WO2005059976A1 PCT/JP2004/018176 JP2004018176W WO2005059976A1 WO 2005059976 A1 WO2005059976 A1 WO 2005059976A1 JP 2004018176 W JP2004018176 W JP 2004018176W WO 2005059976 A1 WO2005059976 A1 WO 2005059976A1
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- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- substrate
- resist film
- ozone
- substrate processing
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 144
- 238000003672 processing method Methods 0.000 title claims abstract description 60
- 238000012545 processing Methods 0.000 title claims description 96
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 118
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000008213 purified water Substances 0.000 claims abstract 2
- 238000000034 method Methods 0.000 claims description 106
- 239000000126 substance Substances 0.000 claims description 32
- 239000000243 solution Substances 0.000 claims description 30
- 238000009833 condensation Methods 0.000 claims description 25
- 230000005494 condensation Effects 0.000 claims description 25
- 239000007788 liquid Substances 0.000 claims description 23
- WGTYBPLFGIVFAS-UHFFFAOYSA-M tetramethylammonium hydroxide Chemical compound [OH-].C[N+](C)(C)C WGTYBPLFGIVFAS-UHFFFAOYSA-M 0.000 claims description 19
- 239000007864 aqueous solution Substances 0.000 claims description 17
- 230000001678 irradiating effect Effects 0.000 claims description 15
- 238000005468 ion implantation Methods 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 10
- 238000010438 heat treatment Methods 0.000 claims description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 239000000908 ammonium hydroxide Substances 0.000 claims description 5
- QEMXHQIAXOOASZ-UHFFFAOYSA-N tetramethylammonium Chemical compound C[N+](C)(C)C QEMXHQIAXOOASZ-UHFFFAOYSA-N 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 103
- 239000007789 gas Substances 0.000 description 100
- 238000011282 treatment Methods 0.000 description 40
- 238000012986 modification Methods 0.000 description 22
- 230000004048 modification Effects 0.000 description 22
- 238000012546 transfer Methods 0.000 description 16
- 239000012528 membrane Substances 0.000 description 11
- 230000000052 comparative effect Effects 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 8
- 239000004065 semiconductor Substances 0.000 description 7
- 238000005406 washing Methods 0.000 description 7
- 238000010926 purge Methods 0.000 description 6
- 238000004925 denaturation Methods 0.000 description 5
- 230000036425 denaturation Effects 0.000 description 5
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 description 4
- 238000001035 drying Methods 0.000 description 4
- 150000002500 ions Chemical class 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000000206 photolithography Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 238000005530 etching Methods 0.000 description 3
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 125000004432 carbon atom Chemical group C* 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 229910001882 dioxygen Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 241000238366 Cephalopoda Species 0.000 description 1
- 241001147107 Chanos Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 239000006117 anti-reflective coating Substances 0.000 description 1
- SWXQKHHHCFXQJF-UHFFFAOYSA-N azane;hydrogen peroxide Chemical compound [NH4+].[O-]O SWXQKHHHCFXQJF-UHFFFAOYSA-N 0.000 description 1
- 230000007175 bidirectional communication Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/42—Stripping or agents therefor
- G03F7/427—Stripping or agents therefor using plasma means only
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/31—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to form insulating layers thereon, e.g. for masking or by using photolithographic techniques; After treatment of these layers; Selection of materials for these layers
- H01L21/3105—After-treatment
- H01L21/311—Etching the insulating layers by chemical or physical means
- H01L21/31127—Etching organic layers
- H01L21/31133—Etching organic layers by chemical means
- H01L21/31138—Etching organic layers by chemical means by dry-etching
Definitions
- Substrate processing method substrate processing apparatus, and computer-readable recording medium
- the present invention relates to a substrate processing method for peeling a hard-to-peel film such as an ArF resist, an antireflection film, or a high-dose ion implantation film provided on a substrate, and a method for performing the substrate processing method.
- the present invention relates to a substrate processing apparatus and a computer-readable recording medium.
- the wavelength of light used in the photolithography process is being reduced for the purpose of high integration of semiconductor devices.
- ArF excimer lasers have been used. Light source technology is about to be put to practical use.
- the photolithography process using this ArF excimer laser is similar to the conventional photolithography process using g-line, i-line, etc. This is performed by exposing the ArF resist film using a reticle on which a predetermined circuit pattern is formed, followed by development.
- JP-A-2002-184741 discloses a method in which a resist film is modified to be water-soluble in an atmosphere of water vapor and ozone gas, and the resist changed to be water-soluble. A method for removing the membrane by a water washing treatment is disclosed.
- the present invention has been made in view of vigorous circumstances, and has been described in connection with a hard-to-remove resist film formed in a photolithography process and unnecessary after an etching process, an ion implantation process, a conductor film forming process, or the like.
- An object of the present invention is to provide a substrate processing method capable of easily removing an anti-reflection film or the like.
- Another object of the present invention is to provide a substrate processing apparatus for executing such a substrate processing method, and a computer-readable recording medium used for controlling the substrate processing apparatus.
- a substrate processing method for removing an ArF resist film from a substrate with an ArF resist film is provided.
- the antireflection film when the substrate further has an antireflection film corresponding to ArF rays, the antireflection film is irradiated with ultraviolet light together with the ArF resist film, and is water-soluble with ozone gas and water vapor together with the ArF resist film. It is also preferable to remove the ArF resist film together with the ArF resist film from the substrate using pure water.
- a substrate processing method for removing an anti-reflection film with a substrate having an anti-reflection film is provided.
- a substrate processing method for removing a resist film with a resist film subjected to an ion implantation treatment at a high dose comprising:
- the substrate processing method according to the third aspect is suitably used when the dose in the ion implantation processing is 1 ⁇ 10 15 Zcm 2 or more.
- the ArF resist film, the antireflection film, and the high-dose ion-implanted film are supplied with water vapor and ozone to the chamber containing the substrate.
- the step of denaturing it is preferable to reduce the supply amount of ozone to the water vapor while supplying the water vapor to the chamber at a constant flow rate so as to prevent dew condensation on the substrate. Thereby, the denaturation of the film such as the ArF resist film can be promoted, and the peeling with pure water becomes easy.
- a supply mode of ozone in such a processing method it is preferable to use a method of periodically stopping the supply of ozone to the chamber.
- the pressure at which dew condensation occurs in the chamber is determined in advance when the chamber is kept at a predetermined temperature and the amount of water vapor supplied to the chamber is constant.
- it is preferable to use a method of controlling the supply amount of ozone while measuring the pressure in the chamber so that the measured pressure does not exceed the previously determined pressure at which dew condensation occurs! Can be
- the substrate processing methods according to the first to third aspects cannot remove the ArF resist film or the like.
- the productivity is reduced due to the squid or the long release rate. Therefore, in order to improve the peeling rate of a film having such a material strength, the present invention provides a substrate processing method according to the following fourth to sixth aspects.
- the substrate glass with an ArF resist film has
- a substrate processing method for removing the anti-reflection film with an anti-reflection film is provided.
- a substrate processing method for removing a resist film with a resist film subjected to an ion implantation treatment at a high dose there is provided a substrate processing method for removing a resist film with a resist film subjected to an ion implantation treatment at a high dose
- the substrate processing method according to the fourth to sixth aspects is the substrate processing method according to the first to third aspects, wherein the substrate is treated with steam and ozone, and then the alkaline chemical is used instead of pure water. Is used to peel off the denatured film.
- the alkaline chemical an APM solution, an aqueous solution of ammonium hydroxide, an aqueous solution of tetramethylammonium hydroxide (TMAH) and the like are preferably used.
- an ultraviolet lamp or an excimer laser having a wavelength of 172 nm to 193 nm is preferably used for ultraviolet irradiation.
- a substrate processing apparatus for performing the substrate processing method according to the first to sixth aspects. That is, according to the seventh aspect of the present invention, an ultraviolet irradiator that irradiates a substrate provided with any one of an ArF resist film, an antireflection film, and a high-dose ion-implanted resist film with ultraviolet light,
- a steam supply unit for supplying steam to the chamber
- An ozone supply unit that supplies ozone to the chamber
- the chamber, the steam supply unit, and the ozone supply unit are controlled such that the inside of the chamber in which the substrate is stored is maintained at a predetermined temperature, and steam and ozone are supplied at a predetermined flow rate into the chamber.
- a substrate processing apparatus comprising:
- the control unit performs control to reduce the amount of ozone supplied into the chamber so as to prevent dew condensation on the substrate in the chamber while supplying steam at a constant flow rate into the chamber.
- the supply of ozone to the chamber is periodically stopped.
- the substrate processing apparatus further includes a liquid processing unit for performing liquid processing on the substrate using pure water, an APM solution, an aqueous solution of ammonium hydroxide, or an aqueous solution of tetramethyl ammonium hydroxide (TMAH). Since it is preferable that the substrate is provided, the treatment of the substrate with water vapor and ozone and the subsequent liquid treatment can be performed smoothly.
- a computer-readable recording medium on which a program for controlling a substrate processing apparatus is recorded. That is, according to the eighth aspect of the present invention, A computer that controls a substrate processing apparatus that processes a substrate housed in a chamber equipped with a heating mechanism with water vapor and ozone.
- a computer that controls a substrate processing apparatus that processes a substrate housed in a chamber equipped with a heating mechanism with water vapor and ozone.
- An ArF resist film that has been subjected to ultraviolet irradiation treatment, an antireflection film, and high-dose ions.
- a substrate provided with any of the injection resist films is accommodated in the chamber, (b) the inside of the chamber is maintained at a predetermined temperature, and (c) water vapor is supplied into the chamber at a constant flow rate.
- a hard-to-remove film such as an ArF resist film, an antireflection film, or a resist film subjected to a high-dose ion-implantation treatment damages portions other than the object to be peeled. It can be peeled off.
- the amount of ozone with respect to water vapor is reduced to create a state in which there is a large amount of water vapor in the chamber, so that the peeling rate of the hardly peelable film can be improved.
- an alkaline chemical solution in the liquid treatment after treating the substrate with water vapor and ozone it is possible to more easily peel off a film that is difficult to peel, thereby further reducing the throughput of the apparatus. it can.
- FIG. 1 is a schematic plan view of a film removal system.
- FIG. 2 is a schematic sectional view of an ultraviolet irradiation unit (UV).
- UV ultraviolet irradiation unit
- FIG. 3 is a schematic sectional view of a membrane denaturing unit (VOS).
- VOS membrane denaturing unit
- FIG. 4 is a diagram showing a schematic configuration of a control system in the film removal system.
- FIG. 5 is a flowchart showing a method for removing an ArF resist film and an antireflection film.
- FIG. 6A is a cross-sectional view schematically showing a process of removing an ArF resist film.
- FIG. 6B is a cross-sectional view schematically showing a process of removing the ArF resist film.
- FIG. 6C is a cross-sectional view schematically showing a removal process of the ArF resist film.
- FIG. 6D is a sectional view schematically showing a removal process of the ArF resist film.
- FIG. 6E is a cross-sectional view schematically showing a process of removing the ArF resist film.
- FIG. 7 is a graph showing a comparison between a peeling rate of an example and a peeling rate of a comparative example.
- FIG. 8 is a flowchart showing another method for removing the ArF resist film and the antireflection film.
- FIG. 1 is a plan view showing a schematic structure of a film removal system 100 for removing a film or the like.
- the carrier C containing the wafer W is also loaded with another processing system or the like, and conversely, the carrier C containing the wafer W processed by the film removal system 100 is next.
- a carrier station 4 for carrying out to a processing system or the like for performing the above-mentioned processing, and a processing station 2 having a plurality of processing units for performing a denaturing process of the ArF resist film or the like provided on the wafer W and a subsequent removal process.
- Transfer station 3 for transferring wafers W between processing station 2 and carrier station 4, and chemical station for manufacturing, preparing, and storing chemicals, pure water, gas, etc. used in processing station 2. 5 is provided.
- the carrier station 4 has a mounting table 6 on which the carrier C can be mounted at three locations along the Y direction in the figure. Inside the carrier C, the wafers W are accommodated in a substantially horizontal posture at regular intervals in the vertical direction (Z direction).
- a control unit (computer) for controlling the processing of the wafer W in the film removal system 100 is incorporated in a space below the mounting table 6.
- the transfer station 3 transfers the wafers and W between the carrier C mounted on the mounting table 6 of the carrier station 4 and a wafer mounting unit (TRS) 18a '18b described later provided at the processing station 2.
- TRS wafer mounting unit
- FIG. 2 is a vertical sectional view showing a schematic structure of the ultraviolet irradiation unit (UV) 19.
- the ultraviolet irradiation unit (UV) 19 is mounted on a stage 22 on which a wafer W is placed, a heater 23 for heating the stage 22, and a stage 22 inside a box 21 having one side open. And a UV light source 25 for irradiating the surface of the wafer W with UV light.
- the ultraviolet light source 25 it is more preferable to use an ultraviolet lamp having an emission wavelength of 172 nm to 193 nm or an ArF excimer laser, preferably an excimer laser. This is because the molecular structure of the ArF resist film or the like is easily changed because the emission wavelength of the ultraviolet light source 25 is close to or the same as the exposure wavelength.
- the temperature of the ueno and W is made uniform in the plane, and the molecular structure of the ArF resist film and the like caused by the irradiation of ultraviolet rays is uniformly changed. Can be.
- the stage 22 is slidable horizontally left and right, and the ultraviolet light source 25 irradiates the ultraviolet power stage 22 side in a linear or band shape with the direction perpendicular to the paper as a longitudinal direction.
- the ultraviolet light source 25 irradiates the ultraviolet power stage 22 side in a linear or band shape with the direction perpendicular to the paper as a longitudinal direction.
- VOS film modification units
- FIG. 3 is a vertical sectional view showing a schematic structure of the membrane modification unit (VOS) 15a.
- the membrane modification unit (VOS) 15a has a chamber 30 for accommodating the wafer W, and the chamber 30 is composed of a fixed lower container 41a and a lid 41b covering the upper surface of the lower container 41a.
- the 4 lb body can be moved up and down by a cylinder 43 fixed to a frame 42 of a membrane modification unit (VOS) 15a.
- An O-ring 51 is arranged on the upper surface of the raised portion around the lower container 41a.
- the lid 43b is lowered by driving the cylinder 43, the periphery of the back surface of the lid 41b is set upright on the periphery of the lower container 41a.
- the O-ring 51 is compressed in contact with the upper surface of the raised portion to form a sealed processing space in the chamber 30.
- the lower container 41a is provided with a stage 33 on which the wafer W is placed. On the surface of the stage 33, a plurality of proximity pins 44 supporting the wafer W are provided. A heater 45a is buried inside the stage 33, and a heater 45b is buried in the lid 41b, so that the stage 33 and the lid 41b can be respectively maintained at a predetermined temperature. In this way, the inside of the chamber 30 is maintained at a predetermined temperature, and the temperature of the wafer W can be kept constant.
- the lid 41b On the back surface of the lid 41b, for example, three claw members 46 for holding the wafer W are provided at three places (only two places are shown in FIG. 3).
- the main wafer transfer device 14 delivers and receives the power to the claw member 46.
- the wafer W is transferred to the proximity pins 44 provided on the stage 33 during the lowering.
- the gas outlet 34b for exhausting the three gases and water vapor to the outside is provided in the lower container 41a.
- the height positions of the gas inlets 34a and the gas outlets 34b are shown below the height of the wafer W placed on the proximity pins 44.
- the gas outlet 34b may be provided at a higher position.
- O gas and water vapor are supplied to chamber 30 by being connected to gas inlet 34a of chamber 30.
- the processing gas supply device 16 converts the oxygen gas (O gas) generated by oxidizing the oxygen gas (O gas) into a gas.
- a steam supply unit 28 for sending to 30. For example, from the O gas supply unit 27 to the chamber
- the supply of O gas to 30 is controlled by opening and closing valve 27a provided on the supply line.
- An exhaust device 32 connected to the gas exhaust port 34b for exhausting the inside of the chamber 30 adjusts the flow rate of gas exhausted from the chamber 30 with a device for performing forced exhaust such as a vacuum pump or an aspirator. It has a variable valve for When maintaining the positive pressure in the chamber 30 while the gas is continuously supplied into the chamber 30, only the adjustment of the variable valve without driving the vacuum pump or the like is required.
- a pressure sensor 48 for measuring the exhaust pressure (same as the pressure in the chamber 30) is attached to the gas outlet 34b provided in the chamber 30.
- the mounting position of the pressure sensor 48 is not limited to this, but may be any place where the internal pressure of the chamber 30 can be measured.
- the processing of the wafer W with the processing gas be performed while the inside of the chamber 30 is maintained at a constant positive pressure.
- the sealing between the lower container 41a and the lid 4 lb is reduced by the pressing force of the cylinder 43 so that the processing gas does not flow from the inside of the chamber 30 to the outside through the space between the lower container 41a and the lid 41b.
- This is performed by fastening the lower container 41a and the protrusions 47a'47b provided on the end surfaces of the lid 41b, which are only dependent on each other, by the lock mechanism 35.
- One set of protrusions 47a'47b overlaps in the vertical direction.
- four sets of protrusions 47a'47b are provided at equal intervals on the outer periphery of the chamber 30 , and a gap is provided between each set. 49 (see the right part of FIG. 3).
- the locking mechanism 35 is a force for holding the lower container 41a and the lid 41b in close contact with each other by sandwiching the projection 47a'47b between the rollers 59a'59b. When the rollers 59a'59b are moved to the position of the gap 49, the lid is moved. 41b can be moved up and down freely.
- liquid processing units (LCU) 12a to 12d for performing liquid processing on the wafers W that have been processed in the film modification units (VOS) 15a to 15h are arranged in two rows and two stages. (12b is located below 12a and 12d is located below 12c). Although the detailed structure of these liquid processing units (LCUs) 12a to 12d is not shown, a rotatable spin chuck for holding the wafer W, a cup surrounding the spin chuck, and a surface of the wafer W held by the spin chuck are provided. Nozzle for supplying alkaline chemical to the nozzle, Pure water nozzle for supplying pure water, and dry gas for wafer W during spin drying after rinsing with pure water And a gas injection nozzle for injecting.
- the chemical station 5 includes the processing gas supply device 16 described above, N gas for purging the inside of the chamber 30 provided in the membrane modification units (VOS) 15a to 15h, and liquid processing.
- VOS membrane modification units
- N gas for supplying to the gas injection nozzle provided in the unit (LCU) 12a-12d is
- a treatment liquid supply device 17 for supplying pure water or an alkaline chemical liquid to d is provided.
- the O gas and water vapor from the processing gas supply device 16 to the chamber 30 the O gas
- a predetermined amount of N gas may be supplied to the chamber 30 at the same time.
- FIG. 4 shows a schematic configuration of a control system of the film removal system 100.
- a control unit (that is, a computer) 110 for controlling the processing of the wafer W by the film removal system 100 includes a process controller (CPU) 111 and a command for a process manager to determine processing conditions and the like of the wafer W.
- the data input / output unit 112 having a display for visualizing and displaying the operation results of the keyboard and the process controller (CPU) 111 for performing input operations and the progress of the cleaning process, etc., and the film removal system 100
- a recording unit 113 in which data related to the program, recipe, executed processing, and the like are recorded.
- the recording unit 113 includes, specifically, a UV irradiation treatment, a film denaturation treatment with O gas and water vapor, and a film stripping treatment with pure water or an alkaline chemical solution, which will be described later in detail.
- Program 115 to execute the process, time distribution in a series of processing of wafer W, transfer route, selection and supply flow and time of pure water or alkaline chemical, supply of N gas
- These processing programs 115 ⁇ recipes 116 include, for example, a fixed storage medium such as a hard disk (HD), a memory (RAM, etc.), a CD-ROM (or CD-R, etc.), a DVD-ROM (or DVD-R, etc.) It is recorded on various portable recording media such as a MO disk and the like, and is recorded so as to be readable by the process controller (CPU) 111.
- the recording unit 113 stores data relating to the processing executed by the film removal system 100, for example, the lot number of the wafer w, the processing recipe used, the processing date and time, and the malfunction of various driving mechanisms during processing. It is possible to record execution data 117 such as presence / absence. Such execution data 117 can be copied and transferred to various portable recording media such as CD-R and MO disks!
- the process controller (CPU) 111 reads the processing program 115 and the recipe 116, and sends, for example, a control signal for transferring the wafer W to the wafer transfer device 7 or the main wafer transfer device 14, Lit Control signal for turning off Z to ultraviolet irradiation unit (UV) 19, Control signal for opening and closing chamber 30 provided in membrane modification unit (VOS) 15a-15h to cylinder 43, O to chamber 30 For gas and steam supply and shutdown
- Control signals are sent to the O gas supply unit 27 and the water vapor supply unit 28, and the liquid processing unit (LCU) 12a-1
- a control signal for adjusting the supply flow rate of the pure water or the chemical solution to the wafer W in 2d is transmitted to the processing liquid supply device 17.
- CPU central processing unit
- CPU 111 preferably monitors the processing based on the measurement value of the pressure sensor 48, and issues a warning when an abnormality occurs.
- bidirectional communication is performed in which data indicating execution of the operation of various mechanisms constituting the film removal system 100 is fed back to the process controller (CPU) 111.
- FIG. 3 shows only main mechanisms and the like controlled by the process controller (CPU) 111, and does not show all of them.
- FIG. 5 shows a schematic flowchart of the first method.
- 6A to 6E are cross-sectional views schematically showing a process of removing the ArF resist film 66.
- FIG. 6A shows an insulating film 60 on which a lower wiring (for example, copper wiring) 62 is formed via a noria metal layer 61, a stopper film (for example, a SiN film, a SiC film) 63, and an insulating film (for example, For example, SiO Wafer), an antireflection film 65 corresponding to ArF, and an ArF resist film 66
- a circuit pattern similar to that of the ArF resist film 66 is formed on the insulating film 64 by, for example, a dry etching process.
- the carrier C containing the wafer is mounted on a mounting table 6 provided in the carrier station 2 of the film removing system 100 by an operator or an automatic transfer device (Step 1).
- a predetermined wafer is also taken out of the carrier C force by the main wafer transfer device 14 and transferred to the wafer mounting unit (TRS) 18b. Placed on top (step 2).
- UV ultraviolet irradiation unit
- the ultraviolet light source 25 irradiates the stage 22 with ultraviolet rays, and at this time, the stage 22 is horizontally scanned at a predetermined speed to be placed on the stage 22. Irradiate UV light uniformly on the entire surface of the wafer (Step 3).
- the ArF resist film formed on the wafer is easily changed to water-soluble by the reaction between O gas and water vapor, which is performed later!
- FIG. 6B schematically shows the state after the process of step 3.
- the intensity of the ultraviolet light emitted from the ultraviolet light source 25 may be increased, the scanning speed of the stage 22 may be reduced, or the number of times of scanning the wafer may be increased.
- the wafer that has been subjected to the ultraviolet irradiation processing is transferred from the ultraviolet irradiation unit (UV) 19 to the film modification unit (VOS) 15a (or any force of 15b to 15h) by the main wafer transfer device 14 (step).
- the heaters 45a and 45b provided in the chamber 30 are constantly generating heat, and after the temperature distribution of the wafer W accommodated in the chamber 30 becomes constant, the O gas is supplied first Only O gas from section 27 into chamber 30
- the chamber 30 is supplied to purge the inside of the chamber 30, and the internal pressure of the chamber 30 is set to a predetermined positive pressure (that is, higher than the external pressure (normally, atmospheric pressure) of the chamber 30).
- the temperature of the lid 41b is set to be higher than the temperature of the stage 33 by a predetermined temperature, when the steam is supplied into the chamber 30 later, the density of the water vapor in the chamber 30 is reduced.
- the pressure is higher on the stage 33 side than on the 41b side, and the steam can be efficiently applied to the wafer W.
- Step 5 the supply amount of O gas and water vapor to chamber 30 and the
- the amount of exhaust from the nozzle 30 is adjusted so that dew does not occur in the chamber 30 and the inside of the chamber 30 has a predetermined positive pressure.
- the O gas and water vapor form the wafer.
- the polymer residue (for example, a polymer residue generated after the etching process) attached to the ArF resist film 66 and the wafer can be modified to be water-soluble. If dew condensation occurs on the surface of the wafer W, dissolution of the resist by water starts at the droplet generation portion, and the denatured state becomes non-uniform, resulting in a resist residue.
- FIG. 6C schematically shows a state in which the ArF resist film has been denatured after the processing of Step 5 is completed.
- the ArF resist film is modified to be water-soluble means that the ArF resist film changes to a property that is easily dissolved in pure water while remaining on the wafer.
- the O gas and water vapor also damage the ArF resist film 66 and the force insulating film 64 that denatures the polymer residue.
- the inside of the chamber 30 is purged. At this time, if a large amount of N gas is suddenly supplied into the chamber 30,
- the supply flow rate of the nitrogen gas should be set relatively small at first, and a certain amount of N
- the wafer W is unloaded from the film modification unit (VOS) 15a by the main wafer transfer unit 14, and the liquid treatment unit (LCU) 12a (or 12b—12d) (!, ⁇ ⁇ ) (Step 6).
- VOS film modification unit
- LCU liquid treatment unit
- the wafer force ArF resist film 66 is removed by rotating the wafer while supplying a fixed amount of pure water to the surface of the wafer held in a substantially horizontal posture.
- FIG. 6D schematically shows the state after the processing in step 7.
- the polymer residue is also removed from the wafer.
- the wafer W is rotated at a high speed to spin dry the wafer W (Step 8).
- the process in step 8 is performed while blowing N gas on the surface of the wafer W.
- the antireflection film 65 remains on the insulating film 64. Therefore, in order to remove the antireflection film 65, the process previously performed on the ArF resist film is repeated. That is, the wafer W after the processing in step 8 is transferred to the ultraviolet irradiation unit (UV) 19 (step 9), where the antireflection film 65 is irradiated with ultraviolet light (step 10). (UV) 19 to the membrane modification unit (V OS) 15a (step 11), where the O-reflection film 65 is
- FIG. 6E schematically shows the state after the processing in step 15.
- the wafer W from which the ArF resist film 66 and the antireflection film 65 have been removed in this way is carried out of the liquid processing unit (LCU) 12a by the main wafer transfer device 14, and the wafer mounting kit. (TRS) 18a, from which it is returned to the carrier C by the wafer transfer device 7 (step 16).
- LCU liquid processing unit
- TRS wafer mounting kit.
- the carrier C force is also carried out and all wafers W that have been processed in the film removal system 100 are returned to the carrier C, the carrier C is transported to a device for performing the next process on the wafer W ( Step 17).
- the antireflection film when the antireflection film is exposed on the surface of the wafer W, Clearly, it can be used to remove only the anti-reflective coating.
- the antireflection film is not limited to the antireflection film corresponding to ArF, but may be a film corresponding to KrF line or g line.
- the antireflection film corresponding to the KrF line or the g line can be removed in a short time according to the first method described above. be able to.
- a total processing time, a processing cost, and a device cost can be reduced.
- a spin-drying process was performed, and the removal rate of the resist film and the like was examined.
- the processing conditions in the ultraviolet irradiation unit (UV) 19 are such that an excimer laser having an emission wavelength of 172 nm is used as the ultraviolet light source 25, the discharge frequency is set to 2000 kHz or 150 kHz, and the temperature of the wafer is set to room temperature (25 ° C.). C) or at 100 ° C. and scanning the wafer.
- the processing conditions in the membrane modification unit (VOS) 15a-15h are as follows: ozone concentration: 200 g ZNm 3 , O gas flow rate: 4 LZmin, chamber temperature: 115 ° C, chamber pressure: 75 kPa, water
- Qi supply time 60 seconds. Also, the N gas is supplied to the chamber 30 simultaneously with the supply of the O gas.
- a wafer on which an ArF resist film was formed was processed in a film modification unit (VOS) 15a-15h without performing ultraviolet irradiation treatment under the same conditions as in the example, and further, a liquid processing unit ( In LCU) 12a-12d, water washing and spin drying were performed, and the stripping rate of the resist film and the like was examined.
- VOS film modification unit
- In LCU liquid processing unit
- FIG. 7 shows a graph comparing the peeling rates of the example and the comparative example.
- the measurement of the peeling rate was performed twice in each of the examples and the comparative examples.
- the peeling rate is extremely low in the comparative example in which the ultraviolet irradiation treatment is not performed, the processing method in the comparative example cannot be practically used in the manufacturing process of the semiconductor device.
- the wafer temperature has almost no effect on the peeling rate, but the peeling rate tends to increase when the discharge frequency is high, and a peeling rate about 35 to 50 times that of the comparative example is obtained. Have been. From this, the ArF resist film becomes O
- the processing method of this embodiment can be sufficiently used in a semiconductor device manufacturing process.
- the antireflection film 65 and the ArF resist film 66 are separately removed.
- the antireflection film 65 and the ArF resist film 66 are simultaneously peeled off.
- the processing is performed in the order of Steps 18 to 16 and 17 shown in FIG. 5, and the amount of ultraviolet irradiation (intensity This is done by increasing).
- This second method can be used when there is no damage due to the irradiation of ultraviolet rays in portions other than the antireflection film 65 and the ArF resist film 66.
- FIG. 8 shows a flowchart of a schematic removal process of the ArF resist film and the antireflection film of the third method.
- the ArF resist film having a predetermined circuit pattern formed on the surface of the layer to be etched and the antireflection film are separately removed, but the film modification unit (VOS ) There is a difference in the treatment method of wafer W with O gas and water vapor at 15a.
- the wafer W having been subjected to the ultraviolet irradiation treatment on the ArF resist film is carried into the film modification unit (VOS) 15a. I do.
- the O gas is supplied into the chamber 30 at a constant flow rate, and the inside of the chamber 30 is pressurized (step 25).
- step 26 the amount of exhaust from the chamber 30 is adjusted so that dew condensation does not occur in the chamber 30, and the inside of the chamber 30 is maintained at a constant pressure. This is because if dew forms on the surface of the wafer W, the resist dissolution starts at the area where water droplets are generated. This is because the state becomes non-uniform and a resist residue is generated.
- the prevention of dew condensation is performed as follows. That is, the pressure at which dew condensation occurs in the chamber 30 when the inside of the chamber 30 is maintained at a predetermined temperature and the amount of steam supplied to the chamber 30 is constant is determined in advance, and the pressure is set to a value smaller than this pressure value. The processing pressure values are set, and these are added to the information of the recipe 116. Then, the process controller (CPU) 111 refers to the measurement value of the pressure sensor 48 so that the pressure in the chamber 30 does not exceed the pressure at which dew condensation occurs and is maintained at the set pressure value. To control the exhaust flow from.
- step 27 By stopping, a large number of water molecules are periodically created in the chamber 30 (step 27). For example, when 15 seconds have elapsed since the start of steam supply,
- step 27 the force that changes the total amount of gas supplied to the chamber 30 periodically is controlled by controlling the exhaust flow rate from the chamber 30 while referring to the measurement value of the pressure sensor 48 as described above.
- the inside of the chamber 30 is maintained at a constant pressure.
- step 27 it is preferable that the process of step 27 be completed in a state where the amount of water vapor in the chamber 30 is small, from the viewpoint of preventing the occurrence of dew condensation. Therefore, O gas and water
- Step 28 After the completion of the processing in step 28, the wafer W is moved from the film modification unit (VOS) 15a to the cleaning unit (CLN) 12a (or in order to perform a water washing treatment for removing the water-soluble denatured ArF resist film from the wafer W. 12b—any of 12d) (Step 29).
- VOS film modification unit
- CLN cleaning unit
- Step 32 the same processing as in Steps 22 to 31 is repeated for the anti-reflection film (Step 32), and the wafer W whose anti-reflection film has been peeled off is returned to the carrier C (Step 33).
- the wafer W is transferred to an apparatus for performing the next processing (step 34).
- a resist film is formed on each of two wafers W using the same resist material, and one is processed by the first method, and the other is processed by the third method.
- the treatment time of the third method was less than 80% of that of the first method. This is presumed to be due to the fact that by creating an atmosphere with many water molecules, many portions of the resist film that are easily modified are created. If the inside of the chamber 30 is always kept high in water vapor, dew condensation tends to occur.However, if the supply of O gas is periodically stopped, dew condensation may occur.
- the gas is not wasted and the efficiency of modifying the resist film is increased.
- step 27 of the third method the supply of O gas is periodically completed as described above.
- the cycle for stopping or reducing the gas supply does not need to be constant.
- the first supply stop time and the subsequent supply stop time may be different.
- the fourth method is similar to the first method described above except that the ArF resist film and the antireflection film are simultaneously separated from each other by the second method.
- the ArF resist film and the antireflection film are simultaneously removed by increasing the amount (intensity) of ultraviolet irradiation.
- the ultraviolet irradiation treatment and the subsequent treatment with O gas and water vapor are used.
- the fifth method is a washing process performed in each of the first to fourth methods described above.
- This is a treatment method in which the treatment is changed to a treatment using an alkaline chemical solution, and the other treatments are not changed.
- an alkaline chemical solution is supplied to Ueno and W in a liquid processing unit (LCU) 12a to remove a resist film or an anti-reflection film to be removed.
- LCU liquid processing unit
- a rinsing process is performed to wash out the alkaline chemical solution with pure water, and then the wafer W is spin-dried.
- Examples of the alkaline chemical solution used in the fifth method include an APM solution (aqueous ammonium hydrogen peroxide solution), an aqueous ammonium hydroxide solution (aqueous ammonia), and a tetramethyl ammonium hydroxide solution.
- An aqueous solution of oxide (TMAH) is preferably used.
- the alkaline chemical is not limited to an aqueous solution, but may be an organic one.
- dew condensation is generated on the wafer W in the treatment with gas and water vapor.
- the resist film hardened by the ion implantation process particularly The resist film that has been ion-implanted to have a density of 10 15 Zcm 2 or more can be removed at a high peeling rate.
- the resist film is not limited to the ArF resist film, but may be a g-line or KrF line-compatible resist film.
- resist films that have been subjected to high dose ion implantation must be removed by dry assing. In this case, the circuit pattern may be damaged at this time.
- the use of water and the use of an alkaline chemical may be selected depending on the ion dose and the solubility of the resist film in each liquid.
- a force indicating a configuration in which a unit for processing wafers W one by one is arranged in the processing station 2 thereof. Is more than one at a time (for example, 25
- notch type unit for processing a single wafer w.
- a semiconductor wafer is illustrated as the substrate, but the substrate is not limited to this, and may be a glass substrate for a flat panel display (FPD).
- FPD flat panel display
- the steam and steam may contain other components, such as hydrogen peroxide.
- the present invention is suitable for a manufacturing process of a semiconductor device or a flat panel display, and an apparatus therefor.
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- Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Chemical & Material Sciences (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Plasma & Fusion (AREA)
- Cleaning Or Drying Semiconductors (AREA)
- Exposure Of Semiconductors, Excluding Electron Or Ion Beam Exposure (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Drying Of Semiconductors (AREA)
Abstract
Description
Claims
Priority Applications (3)
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US10/579,423 US7731799B2 (en) | 2003-12-18 | 2004-12-07 | Substrate processing method, substrate processing apparatus and computer-readable memory medium |
JP2005516291A JPWO2005059976A1 (ja) | 2003-12-18 | 2004-12-07 | 基板処理方法、基板処理装置およびコンピュータ読み取り可能な記録媒体 |
AT0941404A AT501775B1 (de) | 2003-12-18 | 2004-12-07 | Verfahren zum entfernen eines resistfilms, substrat-behandlungsvorrichtung und computer-lesbares aufzeichnungsmedium |
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JP2003420785 | 2003-12-18 | ||
JP2003-420785 | 2003-12-18 |
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PCT/JP2004/018176 WO2005059976A1 (ja) | 2003-12-18 | 2004-12-07 | 基板処理方法、基板処理装置およびコンピュータ読み取り可能な記録媒体 |
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US (1) | US7731799B2 (ja) |
JP (2) | JPWO2005059976A1 (ja) |
KR (1) | KR100728547B1 (ja) |
AT (1) | AT501775B1 (ja) |
TW (1) | TWI281207B (ja) |
WO (1) | WO2005059976A1 (ja) |
Cited By (1)
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WO2007037305A1 (ja) * | 2005-09-29 | 2007-04-05 | Tokyo Electron Limited | 基板処理方法 |
Families Citing this family (13)
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JP4459774B2 (ja) * | 2004-10-12 | 2010-04-28 | 東京エレクトロン株式会社 | 基板処理方法、基板処理装置およびコンピュータプログラム |
EP2166564B1 (en) * | 2008-09-19 | 2017-04-12 | Imec | Method for removing a hardened photoresist from a semiconductor substrate |
JP5454449B2 (ja) * | 2010-10-19 | 2014-03-26 | 東京エレクトロン株式会社 | レジスト除去方法、レジスト除去装置及び記憶媒体 |
US9153464B2 (en) | 2011-05-31 | 2015-10-06 | Semes Co., Ltd. | Substrate processing apparatus and substrate processing method |
KR102394994B1 (ko) * | 2013-09-04 | 2022-05-04 | 도쿄엘렉트론가부시키가이샤 | 유도 자기 조립용 화학 템플릿을 생성하기 위한 경화 포토레지스트의 자외선을 이용한 박리 |
US20150136186A1 (en) * | 2013-11-20 | 2015-05-21 | Tokyo Electron Limited | System for processing substrates with two or more ultraviolet light sources that provide different wavelengths of light |
US9740104B2 (en) * | 2014-05-02 | 2017-08-22 | Lam Research Corporation | Plasma dry strip pretreatment to enhance ion implanted resist removal |
JP6428466B2 (ja) * | 2014-06-23 | 2018-11-28 | 東京エレクトロン株式会社 | 基板処理方法、基板処理装置、基板処理システム及び記憶媒体 |
KR101506213B1 (ko) * | 2014-11-18 | 2015-03-27 | 주식회사 엘피케이 | 매엽식 감광성 수지막 제거장치 |
JP6354539B2 (ja) * | 2014-11-25 | 2018-07-11 | 東京エレクトロン株式会社 | 基板処理装置、基板処理方法、記憶媒体 |
KR101571089B1 (ko) * | 2015-05-28 | 2016-07-20 | 주식회사 엘피케이 | 포토레지스트막 제거장치 |
DE102017108076A1 (de) * | 2017-04-13 | 2018-10-18 | Ist Metz Gmbh | Vorrichtung zur Oberflächenbehandlung von Objekten |
JP7525338B2 (ja) | 2020-08-31 | 2024-07-30 | 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 |
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- 2004-12-07 JP JP2005516291A patent/JPWO2005059976A1/ja active Pending
- 2004-12-07 WO PCT/JP2004/018176 patent/WO2005059976A1/ja active IP Right Grant
- 2004-12-07 US US10/579,423 patent/US7731799B2/en not_active Expired - Fee Related
- 2004-12-07 KR KR1020057012922A patent/KR100728547B1/ko not_active IP Right Cessation
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Publication number | Publication date |
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AT501775A2 (de) | 2006-11-15 |
JP2008294453A (ja) | 2008-12-04 |
JPWO2005059976A1 (ja) | 2007-07-12 |
TW200524032A (en) | 2005-07-16 |
TWI281207B (en) | 2007-05-11 |
AT501775B1 (de) | 2009-01-15 |
US20070074747A1 (en) | 2007-04-05 |
US7731799B2 (en) | 2010-06-08 |
JP4811877B2 (ja) | 2011-11-09 |
AT501775A5 (de) | 2008-10-15 |
KR20060009232A (ko) | 2006-01-31 |
KR100728547B1 (ko) | 2007-06-15 |
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