WO2004079804A1 - 基板処理装置および半導体装置の製造方法 - Google Patents
基板処理装置および半導体装置の製造方法 Download PDFInfo
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- WO2004079804A1 WO2004079804A1 PCT/JP2004/002334 JP2004002334W WO2004079804A1 WO 2004079804 A1 WO2004079804 A1 WO 2004079804A1 JP 2004002334 W JP2004002334 W JP 2004002334W WO 2004079804 A1 WO2004079804 A1 WO 2004079804A1
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- WO
- WIPO (PCT)
- Prior art keywords
- gas supply
- processing
- supply line
- line
- purge gas
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims description 47
- 239000000758 substrate Substances 0.000 title claims description 45
- 239000004065 semiconductor Substances 0.000 title claims description 13
- 239000007789 gas Substances 0.000 claims abstract description 317
- 238000010926 purge Methods 0.000 claims abstract description 127
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 238000010790 dilution Methods 0.000 claims abstract description 22
- 239000012895 dilution Substances 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims description 33
- 238000011144 upstream manufacturing Methods 0.000 claims description 12
- 239000011261 inert gas Substances 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 claims description 6
- 229910001882 dioxygen Inorganic materials 0.000 claims description 6
- 239000010453 quartz Substances 0.000 claims description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000003672 processing method Methods 0.000 claims 1
- 238000003860 storage Methods 0.000 claims 1
- 238000007254 oxidation reaction Methods 0.000 abstract description 10
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 9
- 230000003647 oxidation Effects 0.000 abstract description 9
- 229910001873 dinitrogen Inorganic materials 0.000 abstract description 8
- 230000001698 pyrogenic effect Effects 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 54
- 235000012431 wafers Nutrition 0.000 description 30
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 239000007787 solid Substances 0.000 description 4
- 230000002411 adverse Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 239000007795 chemical reaction product Substances 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000004904 shortening Methods 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000007865 diluting Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000002791 soaking Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
- HQVNEWCFYHHQES-UHFFFAOYSA-N silicon nitride Chemical compound N12[Si]34N5[Si]62N3[Si]51N64 HQVNEWCFYHHQES-UHFFFAOYSA-N 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/10—Oxidising
-
- 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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
- H01L21/02225—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer
- H01L21/02227—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process
- H01L21/0223—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate
- H01L21/02233—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer
- H01L21/02236—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor
- H01L21/02238—Forming insulating materials on a substrate characterised by the process for the formation of the insulating layer formation by a process other than a deposition process formation by oxidation, e.g. oxidation of the substrate of the semiconductor substrate or a semiconductor layer group IV semiconductor silicon in uncombined form, i.e. pure silicon
-
- 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
- H01L21/314—Inorganic layers
- H01L21/316—Inorganic layers composed of oxides or glassy oxides or oxide based glass
- H01L21/3165—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation
- H01L21/31654—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself
- H01L21/31658—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe
- H01L21/31662—Inorganic layers composed of oxides or glassy oxides or oxide based glass formed by oxidation of semiconductor materials, e.g. the body itself by thermal oxidation, e.g. of SiGe of silicon in uncombined form
Definitions
- the present invention relates to a substrate processing apparatus and a method for manufacturing a semiconductor device, and more particularly to a technique for purging a processing chamber with a purge gas, for example, a semiconductor wafer (hereinafter, referred to as a wafer) in which a semiconductor integrated circuit including a semiconductor element is formed.
- a wafer a semiconductor wafer
- the present invention relates to a field which is effective for use in an oxide film forming apparatus for forming an oxide film. Background art
- a processing gas supply line for supplying a processing gas to a processing chamber and an exhaust line for exhausting the processing chamber are provided.
- a residue step such as a treatment gas or a reaction product remaining in the treatment gas supply line is extruded, and a step is carried out (for example, Japanese Patent Application Laid-Open No. 2002-151549). That is, in this oxide film forming apparatus, the residue of the processing gas supply line is pushed out by flowing the purge gas to the processing gas supply line after the oxide film forming step.
- the residue of the processing gas supply line may not be sufficiently purged in some cases. Residue that cannot be purged is supplied to the processing chamber little by little together with the purge gas in the step after the formation of the oxygen-rich film, thereby causing a change in fl thickness and a decrease in film thickness uniformity. Therefore, in the conventional oxide film forming apparatus, measures are taken to reduce the influence of the residue by heating the processing gas supply line or shortening the processing gas supply line.
- An object of the present invention is to provide a substrate processing apparatus capable of sufficiently reducing the influence of a residue and a method for manufacturing a semiconductor device using the same. Disclosure of the invention
- the present invention provides a processing chamber for processing a substrate, a processing gas source for supplying a processing gas, a processing gas supply line for connecting the processing chamber and the processing gas source, and a processing gas supply line connected to the processing gas supply line.
- the purge gas supplied from the purge gas supply line flows to both the processing chamber side (downstream side) and the vent line side (upstream side) of the processing gas supply line.
- ADVANTAGE OF THE INVENTION when purging, it is possible to prevent the residue on the upstream side (processing gas source side) of the processing gas supply line from the connection with the purge gas supply line from flowing into the processing chamber. Can be. Residues can be reliably discharged, so that evils and effects of the residues can be prevented. BRIEF DESCRIPTION OF THE FIGURES
- FIG. 1 is a partially omitted front sectional view showing a pyrogenic oxidizing apparatus according to an embodiment of the present invention.
- FIG. 1 is a cross-sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line.
- FIG. 3 is a partially omitted front view showing the acid step.
- FIG. 4 is a partially omitted front view showing a package step.
- FIG. 5 is a line graph showing the effect of preventing the film thickness uniformity from being adversely affected.
- FIG. 5 (a) shows the case of the conventional example
- FIG. 5 (b) shows the case of the present embodiment.
- FIG. 6 is a bar graph showing the effect of preventing film thickness uniformity from deteriorating.
- FIG. 6 (a) shows the case of the conventional example, and
- FIG. 6 (b) shows the case of the present embodiment.
- FIG. 7 is a sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line according to a second embodiment of the present invention.
- FIG. 8 is a sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line according to a third embodiment of the present invention.
- FIG. 9 is a sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line according to a fourth embodiment of the present invention.
- FIG. 10 is a sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line according to a fifth embodiment of the present invention.
- FIG. 11 is a cross-sectional view showing the vicinity of a connection portion of a purge gas supply line in a processing gas supply line according to a sixth embodiment of the present invention.
- the substrate processing apparatus is functionally configured as a pyridinic oxidizing apparatus which is an example of an oxide film forming apparatus for forming an oxide film on a wafer.
- a pyridinic oxidizing apparatus which is an example of an oxide film forming apparatus for forming an oxide film on a wafer.
- Pairojiwenikku oxidizer 1 0 includes a process tube 1 2, process tube 1 2 quartz (S i 0 2) is being used to close the upper end lower end is integrally molded in a circular cylindrical shape with an opening.
- the process tube 12 is arranged vertically so that the center line is vertical, and is supported by the housing 11.
- the hollow portion of the process tube 12 forms a processing chamber 13.
- the processing chamber 13 aligns a plurality of wafers 1 concentrically. It is configured such that the boat I7 held in the held state is carried in.
- the lower end opening of the process tube 12 constitutes a furnace b 14 for carrying in and out the boat 27.
- a plurality of flow holes 15 are arranged in a closed wall (hereinafter referred to as a ceiling wall) at an upper end of the process tube 12 so as to disperse gas throughout the processing chamber 13 and are opened in the thickness direction.
- a gas reservoir 16 is formed on the ceiling wall of the process tube 12 so as to cover the flow holes 15.
- a heat equalizing tube 17 is installed concentrically on the outside of the process tube 12.
- the heat equalizing tube 17 is made of silicon carbide (SiC) and is integrated into a cylindrical shape with its upper end closed and its lower end open. Is molded.
- the soaking tube 17 is also supported by the housing 11.
- a heat sink 18 is installed concentrically outside the heat equalizing tube 17 so as to surround the heat equalizing tube 17, and the heater unit 18 is also supported by the housing 11.
- a thermocouple 19 is laid vertically between the process tube 12 and the soaking tube 17, and the heater units 1 and 8 are connected to a controller (not shown) based on the temperature detection of the thermocouple 19. By the control, the processing chamber 13 is configured to be heated to a uniform or predetermined temperature distribution over the entirety.
- a seal cap 21 is concentrically disposed directly below the process tube 12, and the seal cap 21 is formed in a disk shape substantially equal to the outer diameter of the process tube 12.
- the seal cap 21 is vertically lifted and lowered by a boat elevator (only a part is shown) 20 constituted by a feed screw mechanism or the like.
- a base 22 made of quartz and formed in a disk shape whose outer diameter is substantially equal to the seal cap 21 is installed.
- An electric motor 4 is installed upward on the lower surface of the seal cap 21, and a boat 17 is vertically supported on a rotating shaft 25 of the electric motor 14 via an insulating cap 26. I have.
- the port 27 has a pair of upper and lower end plates 28 and 29 and a plurality of (three in this embodiment) holding members 3 which are provided vertically between the end plates 28.29. With 0 In addition, a plurality of holding grooves 31 are provided in each holding member 30 at equal intervals in the longitudinal direction and are engraved so as to open each other in the same plane. Incidentally, since the outer peripheral portion of the wafer 1 is simultaneously inserted into the three holding grooves 31, the plurality of wafers 1 are aligned in the boat 17 horizontally and centered with each other. Is held. Under the lower end plate 29 of the port 27, an insulating cap ° 26 is installed, and the insulating cap 26 is installed on the base 22.
- An exhaust pipe 32 is connected to a lower portion of a side wall of the process tube 12 so as to communicate with the processing chamber 13, and one end of an exhaust line 33 is connected to the exhaust pipe 32.
- the other end of the exhaust line 33 is connected to an exhaust device 34 constituted by a vacuum pump, a blower or the like.
- a pressure regulator 35 is provided in the middle of the exhaust line 33, and the pressure regulator 35 is controlled by a controller based on the detection result of the pressure sensor 36 connected in the middle of the exhaust line 33 (Fig. (Not shown), the pressure in the processing chamber 13 is controlled to a predetermined pressure.
- a supply pipe 37 is laid outside the process tube 12, and the supply pipe 37 extends vertically along a part of the process tube 12, and has an upper end. Is connected to the gas reservoir 16.
- a processing gas supply line 38 is connected to the lower end of the supply pipe 37, and an external combustion device 39 as a processing gas supply device is connected to the processing gas supply line 38.
- the external combustion device 39 has a combustion chamber connected to the processing gas supply line 38, and oxygen (0 2 ) is provided on the side of the combustion chamber opposite to the processing gas supply line 38.
- the oxygen gas supply line 41 connected to the gas source 40 and the hydrogen gas supply line 43 connected to the hydrogen (H 2 ) gas source 42 are connected to each other.
- a dilution gas supply line 45 for supplying an inert gas for diluting the treatment gas is connected to the processing gas supply line 38 downstream of the external combustion device 39.
- the other end of 45 is connected to a nitrogen gas supply source 44 for supplying nitrogen gas as an inert gas.
- the first stop valve 46 is composed of a normally closed 'spring offset' solenoid-operated directional control valve.
- the solenoid of the first stop valve 46 is connected to the controller 60, and the The opening and closing are controlled by the LA 60.
- An upstream end of a purge gas supply line 47 for supplying an inert gas for purging the processing chamber 13 is connected to an upstream side of the first stop valve 46 in the dilution gas supply line 45.
- the downstream end of the line 47 is connected to a downstream side of a connection portion of the processing gas supply line 38 with the external combustion device 39.
- a second stop valve 48 is interposed in the middle of the purge gas supply line 47.
- the second stop valve 48 is composed of 2 ports, 2 positions, normal close, spring offset, and electromagnetic switching valve. I have.
- the solenoid of the second stop valve 48 is connected to the controller 60, and the opening and closing of the solenoid is controlled by the controller 60.
- a third stop valve 50 is interposed in the middle of the vent line 49, and the third stop valve 50 is constituted by a 2-port / 2-position 'normal close' spring offset 'electromagnetic switching valve. I have.
- the solenoid of the third stop valve 50 is connected to the controller 60 so that opening and closing are controlled by the controller 60.
- a flow control device 51 constituted by an MFC (mass flow controller) or the like is interposed.
- the flow controller 51 is configured so that the controller 60 can control the flow rate of the gas flowing through the vent line 49. Note that a flow meter may be provided instead of the flow control device 51.
- the inner diameter D 4 7 of the purge gas line connection section has an inner diameter corresponding the outer diameter of 1 / 4-3 / 8 inches piping, i.e., 4.3 5 to 7.5 is desirable to about 2 mm, supply pipe connection the inner diameter D 3 7 and the inner diameter of the inner diameter D 4 9 and vent line 4 9 of the vent line connection unit parts, the outer diameter of 1 / 4-3 / 8 Inchi pipe having an inner diameter of more than, that is, 4.3 5 to 7.5 It is desirable to set it to about 2 mm or more.
- the inside diameter D47 of the part of the processing gas supply line 38 connected to the purge gas supply line 47 is the inside diameter D37 of the part connected to the supply pipe 37 or the part of the part connected to the vent line 49 .
- the processing gas supply line 38 The inside diameter D47 of the part to which the purge gas supply line 47 is connected is preferably set to 5 to 6 mm.
- the inner diameter D49 of the part connected to the vent line 49 and the inner diameter D37 of the part connected to the supply pipe 37 are equal to the inner diameter of the conventional processing gas supply line 38.
- the inside diameter D 47 of the part to which the purge gas supply line 47 is connected is set to “1/2” or less of the inside diameter of the conventional processing gas supply line 38, but the purge gas supply line 47
- There set an inner diameter D 47 of the portion connected to the equivalent inner diameter of the conventional process gas supply line 3 8 the portion connected to the inner diameter D 49 and the supply pipe 3 7 parts of the vent line 4 9 is connected
- the inner diameter D37 may be set to be at least twice the inner diameter of the conventional processing gas supply line 38 .
- a part of the processing gas supply line 38 constitutes a conductance pipe 38a, and the base 3 of the processing gas supply line 38 on the side of the process tube 12 is formed. It is detachably connected to 8b by a flange fitting 38c.
- the conductance tube 38a is formed of quartz, and is designed to suppress impurities and ensure corrosion resistance. '
- the purge gas supply line 47 and the vent line 49 are connected to the conductance pipe 38a as described above.
- the reason why the inner diameter of the conductance tube 38a is made different as described above is that a pressure difference is formed inside the conductance tube 38a.
- the inside diameter D47 of the part connected to the purge gas supply line 47 is set smaller (thinner) than the inside diameter D37 of the part connected to the supply pipe 37 and the inside diameter D49 of the part connected to the vent line 49. The reason for this is to make the pressure in that part (narrow tube part) higher than the pressure in the thick tube part on both sides.
- the boat 27 holding a plurality of wafers 1 aligned is vertically aligned with the wafer 1 group on the base 22 on the seal cap 21.
- the base 22 is brought into close contact with the seal ring 13 therebetween, so that the processing chamber 13 is airtightly closed.
- the processing chamber 13 While the processing chamber 13 is airtightly closed by the seal ring 23, the inside of the processing chamber 13 is exhausted by the exhaust line 33, and is heated to a predetermined temperature by the heater unit 18.
- oxygen gas and hydrogen gas are supplied to the combustion chamber of the external combustion device 39 at a predetermined flow rate by the oxygen gas supply line 41 and the hydrogen gas supply line 43, respectively.
- the temperature of the combustion chamber of the external combustion device 39 is heated to a temperature equal to or higher than the combustion temperature of hydrogen gas, oxygen gas and hydrogen gas undergo a combustion reaction, so that steam (H 2 ⁇ ) is generated as processing gas 61.
- the controller 60 opens the first stop valve 46 of the dilution gas supply line 45, and opens the second stop valve 48 and the vent of the purge gas supply line 47. Close third stop valve 50 on line 49.
- a mixed gas 63 of the processing gas 61 and the nitrogen gas 62 which is an inert gas as a diluting gas, is sent to the processing chamber 13 from the processing gas supply line 38 to the supply pipe 37.
- the gas is supplied to the gas reservoir 16 of the process tube 11 by the supply pipe 37.
- the mixed gas 63 supplied to the gas reservoir 16 is evenly distributed throughout the processing chamber 13 by the circulation holes 15. Be scattered.
- the mixed gas 6 3 uniformly dispersed in the processing chamber 13 flows down the processing chamber 13 while uniformly contacting the plurality of wafers 1 held in the boat 17, and flows through the exhaust pipe 3 2 to the exhaust line 3.
- the gas is exhausted to the outside of the processing chamber 13 by the exhaust power of 3.
- An oxidation film is formed on the surface of the wafer 1 by an oxidation reaction of the processing gas 61 due to the contact of the mixed gas 63 with the surface of the wafer 1.
- the controller 60 stops supplying oxygen gas and hydrogen gas to the combustion chamber of the external combustion device 39, as shown in FIG. Subsequently, the controller 60 closes the first stop valve 46 of the dilution gas supply line 45, and closes the second stop valve 48 of the purge gas supply line 47 and the third stop valve 50 of the vent line 49, respectively. open. At this time, the controller 60 controls so that a small flow rate of the nitrogen gas 62 flows from the first stop valve 46 of the dilution gas supply line 45.
- a nitrogen gas (hereinafter sometimes referred to as a purge gas) 62 diverted from the purge gas supply line 47 to the vent line 49 side is connected to the processing gas supply line 38. It flows backward and flows through the processing gas supply line 38—vent line 4 9 ⁇ 3 ⁇ 4 # gas line 33.
- the processing gas supply line 38 is connected to the purge gas supply line 47, and the residue such as the processing gas or the reaction product remaining on the external combustion device 39 side and diffusing to the processing chamber 13 side is vented. It will be flushed to the exhaust line 33 through line 49.
- the residue that diffuses from the processing gas supply line 38 on the side of the external combustion device 39 to the processing chamber 13 from the connection point with the purge gas supply line 47 is transferred to the processing chamber 13 by the vent line 49. Is completely bypassed to the exhaust line 33 and the residue does not flow into the processing chamber 13.
- the ratio of the split flow between the exhaust flow rate of the purge gas 62 and the exhaust flow rate of the vent line 49 and the exhaust flow rate to the supply pipe 37 side is determined by the flow rate control device 51 interposed in the vent line 49 and the flow rate of the vent line 4. 9 can be adjusted by controlling the flow rate.
- the flow rate of the total gas supplied from each gas supply line is T
- the flow rate of the purge gas from the purge gas supply line 47 is B ′
- the purge gas supplied to the processing chamber 13 is Is D
- the flow rate exhausted by the vent line 49 is E
- the flow rate of the small inert gas flow from the dilution gas supply line 45 is A '
- the total flow rate is the exhaust gas discharged by the vent line 49.
- a flow rate D at which a purge gas is supplied to the processing chamber 13 and a flow rate exhausted at the vent line 49 The controller 60 determines the flow rate D of the gas to be supplied to the processing chamber 13, and the external combustion is performed from the connection point of the purge gas supply line 47 in the processing gas supply line 38.
- the pressure P 3 9 position of the device 3 9 side (the gas flow upstream of the process gas) is not higher than the pressure P 4 7 of the connecting portion of the process gas supply line 3 8 to your Keru purge gas supply line 4 7
- the flow control device 51 adjusts the flow rate of “ ⁇ ′ + ⁇ ”.
- the purge gas 62 diverted from the purge gas supply line 47 to the supply pipe 37 side flows through the processing gas supply line 38 and the supply pipe 37 to the gas reservoir 16 of the process tube 12. Supplied.
- the inner diameter D 4 7 of the purge gas line connecting portion that put the process gas supply line 3 8 is small fence set than the inner diameter D "of the vent line connection portion, the pressure of the purge gas supply line connection portion Bentora Since the pressure is higher than the pressure at the connection portion, the residue can be prevented from diffusing from the external combustion device 39 side of the processing gas supply line 38 to the supply pipe 37 side.
- the purge gas 62 supplied to 16 is evenly distributed throughout the processing chamber 13 by the flow holes 15.
- the purge gas 62 uniformly distributed in the processing chamber 13 is held in the port 27.
- the wafer flows down through the processing chamber 13 while being in uniform contact with the plurality of wafers 1, and is exhausted from the exhaust pipe 32 to the outside of the processing chamber 13 by the exhaust power of the exhaust line 33.
- Processing gas 61 and reaction products remaining in chamber 13 Are purged by the flow of the purge gas 62. Since the purge gas 62 does not contain the residue of the processing gas supply line 38, the oxide film properly formed on the wafer 1 by the above-described acid step. Is the residue contained in the purge gas 62 As a result, it is possible to prevent a phenomenon that the film thickness uniformity in the wafer surface (hereinafter, referred to as film thickness uniformity) is deteriorated.
- a port unloading (port unloading) step is performed. That is, the seal cap 21 is lowered by the boat elevator 20 and the port 27 is carried out of the processing chamber 13.
- a wafer disposition step for taking out the processed wafer 1 from the boat 27 is performed.
- the controller 60 opens the first stop valve 46 of the dilution gas supply line 45 without the port 17, that is, the wafer 1, in the processing chamber 13, so that the external combustion device 39 cannot open.
- the residue on the upstream side of the vent line 49 of the processing gas supply line 38 is removed.
- the inert gas supplied from the external combustion device 39 flows through the processing gas supply line 38, passes through the processing chamber 13, and is exhausted from the exhaust line 33.
- the purge gas supply line 47 and the vent line 49 may be used.
- the present embodiment it is possible to prevent the residue of the processing gas supply line 38 from flowing into the processing chamber 13 in the purging step.
- the phenomenon in which the uniformity of the thickness of the oxide film formed in the above-mentioned manner is adversely affected by the residue can be prevented beforehand.
- FIG. 5 is a line graph showing the effect of preventing the deterioration of the film thickness uniformity.
- FIG. 5 (a) shows the case of the conventional example
- FIG. 5 (b) shows the case of the present embodiment.
- the horizontal axis shows the position of the wafer in the boat, where to P indicates the upper end, cen indicates the center, and b 0 t indicates the lower end.
- Vertical left axis Is the film thickness (A), and the vertical right axis is the film thickness uniformity (the standard deviation is shown by a human).
- the solid broken line A1 indicates the film thickness
- the broken broken line A2 indicates the film thickness uniformity
- a solid broken line B1 indicates the film thickness
- a broken broken line B2 indicates the film thickness uniformity.
- the processing conditions are the same in the conventional example and the present embodiment, and are as follows.
- the port loaded with 150 wafers is loaded into a processing chamber heated to 600 ° C, and the temperature of the processing chamber is raised to 600 ° C, and the substrate temperature is raised to the processing temperature.
- the oxidation step is performed at a temperature of 65 ° C and atmospheric pressure with a flow of process gas (water vapor) of only 1 SLM (standard liter per minute).
- an annealing step is performed in an atmosphere of 900 ° C. Processing time is 30 minutes. Thereafter, nitrogen gas is flowed at 20 SLM, and a purge step is performed. The purge time is 5 minutes.
- the temperature of the processing chamber is reduced to 65O 0 C, and the boat is unloaded from the processing chamber.
- the film thickness indicated by the solid broken line B1 is larger than the conventional film thickness indicated by the solid broken line A1.
- the film thickness uniformity indicated by the broken line B2 is 0-2 or less, and the conventional film thickness uniformity indicated by the broken line A2 (0.3-0.4). People).
- FIG. 6 is a bar graph showing the effect of preventing the film thickness uniformity from being adversely affected.
- FIG. 6 (a) shows the case of the conventional example, and
- FIG. 6 (b) shows the case of the present embodiment.
- the horizontal axis shows a sequence (oxidation step to purge step) each time, and shows the case where the same sequence is repeated three times.
- the bar t 0 p indicates the case of the wafer arranged at the upper end
- the bar c en indicates the center
- the bar b o t indicates the case of the wafer arranged at the lower end.
- the vertical axis shows the film thickness uniformity (the standard deviation is shown by a human).
- the broken line L indicates the standard deviation of the target value (0.3 persons).
- the processing conditions are the same between the conventional example and the present embodiment, and are the same as in FIG. It is.
- the film thickness uniformity is improved each time the first time is increased from the second time to the third time, but it is unstable and the target value is increased. L could not be cleared.
- the film thickness uniformity is almost stable even when the number of times is increased from the first time to the second time to the third time. In this case, the film thickness uniformity was 0.2 A or less, and the target value was significantly cleared.
- the purge gas is supplied to both the downstream side and the upstream side of the connection between the processing gas supply line 38 and the purge gas supply line 47, so that the processing chamber 13 is supplied to the processing chamber 13.
- the processing gas supply line 38 is located upstream of the connection portion with the purge gas supply line 47 (the inside of the external combustion device 39 and the processing gas supply line 3). 8) can be prevented from flowing (spreading) into the processing chamber 13.
- a part of the processing gas supply line 38 is formed as a conductance pipe 38a, and the purge gas supply line 47 and the vent line 49 are connected to form a process tube 1 2 of the processing gas supply line 38.
- the conductance pipe 38a which is a part of the processing gas supply line 38, may be configured as shown in FIG. 7 to FIG.
- the inside diameter D "of the connection portion between the processing gas supply line 38 and the vent line 49 is the inside diameter D 47 of the connection portion with the purge gas supply line 47 and the supply pipe. It is set to be larger than the inner diameter D37 of the connection with 37 ( D49 > D47 , D49 > D37 )
- the flow control device 5 interposed in the vent line 49 is used. By controlling the flow rate by 1, the same operation and effect as in the above embodiment can be obtained.
- the inside diameter D 49 of the connection portion between the processing gas supply line 38 and the vent line 49 and the inside diameter D 47 of the connection portion with the purge gas supply line 47 are the supply pipe 3. It is larger (D 49> D 37, D 47> D 37) set of a connection portion inner diameter D 37 of 7.
- the flow rate control device 51 provided in the vent line 49 by controlling the flow rate by the flow rate control device 51 provided in the vent line 49, the same operation and effect as in the above-described embodiment can be obtained.
- the inside diameter D 47 of the connection portion between the processing gas supply line 38 and the purge gas supply line 47 is the inside diameter D 49 of the connection portion with the vent line 49 and the supply tube 3 larger than the inner diameter D 37 of the connecting portion between 7 (D 47> D 49, D 4 7> D 37) are set.
- the processing gas supply line 38 has an inner diameter D "at the connection with the purge gas supply line 47, which is larger than the inner diameter D49 at the connection with the vent line 49. Although it is set to be small (D 47 ⁇ D "), the connection of the purge gas supply line 47 is adjacent to the connection with the vent line 49 .
- the supply source of the purge gas to the purge gas supply line may be provided separately from the supply source of the inert gas connected to the dilution gas supply line.
- the dilution gas supply line may be omitted. Also, the stop valve may be arranged as needed.
- the treatment is not limited to the formation of an oxide film.
- the film formation process for forming a CVD film such as a silicon nitride film or a polysilicon film, the diffusion process, and the carrier activity after ion implantation. It can be applied to all substrate processing where a single step is performed after a step in which a process gas, such as a process or other thermal treatment, is used. Further, the present invention is not limited to application to a pyrogenic oxidation apparatus, but can be applied to all other substrate processing apparatuses such as other oxidation apparatuses, diffusion apparatuses, annealing apparatuses, and other heat treatment apparatuses.
- the present invention can be applied not only to a new substrate processing apparatus but also to an existing substrate processing apparatus by modification. In such a case, it is possible to cope easily or at low cost simply by providing a conductance pipe, a purge gas supply line, and a vent line while keeping the configuration of the apparatus substantially unchanged.
- the substrate to be processed may be a photomask, a printed wiring board, a liquid crystal panel, a compact disk, a magnetic disk, or the like.
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Formation Of Insulating Films (AREA)
Abstract
Description
Claims
Priority Applications (2)
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US10/547,692 US20070128878A1 (en) | 2003-03-03 | 2004-02-27 | Substrate processing apparatus and method for producing a semiconductor device |
JP2005503016A JP4264084B2 (ja) | 2003-03-03 | 2004-02-27 | 基板処理装置および半導体装置の製造方法 |
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JP2003056260 | 2003-03-03 | ||
JP2003-056260 | 2003-03-03 |
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US (1) | US20070128878A1 (ja) |
JP (1) | JP4264084B2 (ja) |
WO (1) | WO2004079804A1 (ja) |
Cited By (1)
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JP2008192667A (ja) * | 2007-02-01 | 2008-08-21 | Tokyo Electron Ltd | 処理システム |
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TWI360179B (en) * | 2003-09-19 | 2012-03-11 | Hitachi Int Electric Inc | Method for manufacturing a semiconductor device, a |
US8007275B2 (en) * | 2008-01-25 | 2011-08-30 | Micron Technology, Inc. | Methods and apparatuses for heating semiconductor wafers |
KR102487805B1 (ko) * | 2015-04-28 | 2023-01-12 | 주성엔지니어링(주) | 기판 처리 장치 및 기판 처리 방법 |
US11772058B2 (en) * | 2019-10-18 | 2023-10-03 | Taiwan Semiconductor Manufacturing Company Limited | Gas mixing system for semiconductor fabrication |
Citations (1)
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JP2002339071A (ja) * | 2001-05-18 | 2002-11-27 | L'air Liquide Sa Pour L'etude & L'exploitation Des Procede S Georges Claude | Alcvdシステムにおける処理ガス供給機構 |
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US5427625A (en) * | 1992-12-18 | 1995-06-27 | Tokyo Electron Kabushiki Kaisha | Method for cleaning heat treatment processing apparatus |
JP3155487B2 (ja) * | 1997-02-12 | 2001-04-09 | 株式会社日立国際電気 | ウェット酸化装置およびウェット酸化方法 |
US6305392B1 (en) * | 1999-02-19 | 2001-10-23 | Applied Materials, Inc. | Method and apparatus for removing processing liquid from a processing liquid delivery line |
US6234219B1 (en) * | 1999-05-25 | 2001-05-22 | Micron Technology, Inc. | Liner for use in processing chamber |
US7037797B1 (en) * | 2000-03-17 | 2006-05-02 | Mattson Technology, Inc. | Localized heating and cooling of substrates |
US20020064961A1 (en) * | 2000-06-26 | 2002-05-30 | Applied Materials, Inc. | Method and apparatus for dissolving a gas into a liquid for single wet wafer processing |
US6887337B2 (en) * | 2000-09-19 | 2005-05-03 | Xactix, Inc. | Apparatus for etching semiconductor samples and a source for providing a gas by sublimation thereto |
US6938638B2 (en) * | 2000-12-28 | 2005-09-06 | Kabushiki Kaisha Toshiba | Gas circulating-processing apparatus |
US7186385B2 (en) * | 2002-07-17 | 2007-03-06 | Applied Materials, Inc. | Apparatus for providing gas to a processing chamber |
JP4486489B2 (ja) * | 2004-12-22 | 2010-06-23 | 東京エレクトロン株式会社 | 処理方法及び処理装置 |
US7249595B2 (en) * | 2005-03-16 | 2007-07-31 | Eaton Corporation | Vapor vent valve with pressure relief function integrated to carbon canister |
-
2004
- 2004-02-27 WO PCT/JP2004/002334 patent/WO2004079804A1/ja active Application Filing
- 2004-02-27 JP JP2005503016A patent/JP4264084B2/ja not_active Expired - Fee Related
- 2004-02-27 US US10/547,692 patent/US20070128878A1/en not_active Abandoned
Patent Citations (1)
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JP2002339071A (ja) * | 2001-05-18 | 2002-11-27 | L'air Liquide Sa Pour L'etude & L'exploitation Des Procede S Georges Claude | Alcvdシステムにおける処理ガス供給機構 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2008192667A (ja) * | 2007-02-01 | 2008-08-21 | Tokyo Electron Ltd | 処理システム |
US8480847B2 (en) | 2007-02-01 | 2013-07-09 | Tokyo Electron Limited | Processing system |
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JPWO2004079804A1 (ja) | 2006-06-08 |
US20070128878A1 (en) | 2007-06-07 |
JP4264084B2 (ja) | 2009-05-13 |
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