WO2006049055A1 - 基板処理装置および半導体デバイスの製造方法 - Google Patents
基板処理装置および半導体デバイスの製造方法 Download PDFInfo
- Publication number
- WO2006049055A1 WO2006049055A1 PCT/JP2005/019670 JP2005019670W WO2006049055A1 WO 2006049055 A1 WO2006049055 A1 WO 2006049055A1 JP 2005019670 W JP2005019670 W JP 2005019670W WO 2006049055 A1 WO2006049055 A1 WO 2006049055A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chamber
- inert gas
- substrate
- exhaust port
- processing
- Prior art date
Links
- 239000000758 substrate Substances 0.000 title claims abstract description 151
- 238000004519 manufacturing process Methods 0.000 title claims description 24
- 239000004065 semiconductor Substances 0.000 title claims description 15
- 239000011261 inert gas Substances 0.000 claims abstract description 150
- 239000007789 gas Substances 0.000 claims abstract description 30
- 238000009434 installation Methods 0.000 claims description 38
- 238000000034 method Methods 0.000 claims description 24
- 238000005192 partition Methods 0.000 claims description 21
- 239000000463 material Substances 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims 1
- 235000012431 wafers Nutrition 0.000 description 77
- 239000002245 particle Substances 0.000 description 13
- 238000011109 contamination Methods 0.000 description 8
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 229910001873 dinitrogen Inorganic materials 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000356 contaminant Substances 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 2
- 229910052814 silicon oxide Inorganic materials 0.000 description 2
- 229910052581 Si3N4 Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000003028 elevating effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000009931 harmful effect Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 229920005591 polysilicon Polymers 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 229910010271 silicon carbide Inorganic materials 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
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000002230 thermal chemical vapour deposition Methods 0.000 description 1
- 238000007669 thermal treatment Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/4401—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber
- C23C16/4408—Means for minimising impurities, e.g. dust, moisture or residual gas, in the reaction chamber by purging residual gases from the reaction chamber or gas lines
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/677—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations
- H01L21/67739—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber
- H01L21/67757—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for conveying, e.g. between different workstations into and out of processing chamber vertical transfer of a batch of workpieces
Definitions
- the present invention relates to a substrate processing apparatus and a method for manufacturing a semiconductor device.
- a semiconductor wafer hereinafter referred to as a wafer
- an IC semiconductor integrated circuit device
- It relates to a material that can be effectively used in a film forming process for forming a CVD film such as an oxide film or a metal film.
- Si N silicon nitride
- SiOx silicon oxide
- polysilicon etc.
- a notch type vertical hot wall type reduced pressure CVD apparatus is widely used in the film forming process of the IC manufacturing method.
- This batch-type vertical hot wall vacuum CVD apparatus holds a wafer in a process chamber that holds a wafer and forms a process chamber for film formation by thermal CVD reaction, and holds a plurality of wafers in an aligned state.
- it includes a boat that is loaded and unloaded, a standby chamber that is formed immediately below the process tube and waits for the boat to be loaded into and unloaded from the processing chamber, and a boat elevator that moves the boat up and down and loads it into and out of the processing chamber.
- a load-lock type batch type vertical wall-type vacuum CVD apparatus (formerly called a load-lock chamber) that can withstand the pressure of sub-atmospheric pressure in the standby chamber ( Hereinafter, it is referred to as a load lock type CVD apparatus).
- a load lock type CVD apparatus For example, see Patent Document 1 and Patent Document 2.
- the load-lock method uses an isolation valve such as a gate valve to isolate the processing chamber from the standby chamber (standby chamber) to prevent air from flowing into the processing chamber and to prevent disturbances such as temperature and pressure. It is a system that stabilizes processing by reducing the size.
- Patent Document 1 Japanese Unexamined Patent Publication No. 2003-151909
- Patent Document 2 JP 09-298137 A
- An object of the present invention is to provide a substrate processing apparatus and a semiconductor device manufacturing method capable of improving gas flow in a load-lock type preliminary chamber.
- a processing chamber for accommodating and processing a substrate
- a spare chamber connected to the processing chamber
- a substrate holder mechanism portion for carrying in and Z or carrying out a substrate holder on which a plurality of substrates are laminated, to the processing chamber;
- An inert gas supply port for supplying an inert gas to the preliminary chamber
- a first exhaust port provided in the preliminary chamber to exhaust the inert gas so as to be above the inert gas supply port;
- the inert gas supplied from the inert gas supply port is supplied only from the first exhaust port.
- a substrate processing apparatus comprising:
- a spare chamber connected to the processing chamber
- a substrate holder mechanism unit for carrying in and Z or carrying out a substrate holder in which a plurality of substrates are laminated and held in the processing chamber;
- An inert gas supply port provided in the preliminary chamber to supply an inert gas to the preliminary chamber so as to be lower than a substrate holding region where the substrate is stacked and held on the substrate holder;
- a first exhaust port provided in the preliminary chamber to exhaust the inert gas so as to be above the substrate holding region;
- a substrate processing apparatus comprising:
- the spare chamber has an exhaust port different from the first exhaust port below an upper end of the substrate holding region, and the substrate holder in which a plurality of substrates are stacked and held is provided in the reserve chamber.
- the inert gas supplied from the inert gas supply port during loading into the processing chamber from the chamber and Z or unloading from the processing chamber to the spare chamber is from below the substrate holding region.
- a control unit that controls the exhaust to flow only from the first exhaust port located above the substrate region out of the plurality of exhaust ports provided in the spare chamber and flowing upward from the substrate holding region.
- the first exhaust port Apart from the first exhaust port, it has a second exhaust port provided in the preliminary chamber so as to be lower than the substrate holding region, and exhausts from the first exhaust port. (2) further comprising a control unit that controls so that the pressure in the spare chamber when the second exhaust port force is exhausted is lower than the pressure in the spare chamber at the time.
- the substrate holder mechanism section includes a drive section and a substrate holder installation section connected to the drive section, and the spare chamber includes a partition plate and an area in which the drive section is installed.
- the substrate holder installation section is partitioned into an area where the substrate holder is installed, and the first exhaust port is provided so as to communicate with the area where the drive section is installed.
- the substrate holder mechanism section includes a drive section and a substrate holder installation section connected to the drive section, and the spare chamber includes a partition plate and an area in which the drive section is installed.
- the substrate holder installation section is partitioned into an area where the substrate holder is installed, and the first exhaust port is provided so as to communicate with the area where the drive section is installed.
- the inert gas supply port is provided with a porous member, the inert gas is The substrate processing apparatus according to any one of (1), (2), (3), (4), (5), and (6), wherein the inert gas force is also supplied to the preliminary chamber.
- a processing chamber for accommodating and processing substrates, a spare chamber connected to the processing chamber, and a substrate holder for loading and Zing or unloading a substrate holder on which a plurality of substrates are stacked into the processing chamber
- a device mechanism for supplying an inert gas to the preliminary chamber, and an exhaust gas provided in the preliminary chamber so as to be above the inert gas supply port.
- a method of manufacturing a semiconductor device using a substrate processing apparatus comprising: a control unit that controls so that an inert gas supplied from a gas supply port is exhausted only from the first exhaust port. ,
- a substrate holder in which the plurality of substrates are stacked and held while the inert gas supplied from the inert gas supply locuser flows upward in the preliminary chamber and exhausts only from the first exhaust port. Carrying into the processing chamber from the preliminary chamber and Z or unloading from the processing chamber to the preliminary chamber;
- the plurality of substrates are stacked while the inert gas supplied from flows from the lower side of the substrate holding region toward the upper side of the substrate holding region and exhausts from the first exhaust port. Carrying the held substrate holder into the processing chamber from the preliminary chamber and carrying it out from the processing chamber to the preliminary chamber; and processing the substrate through the processing chamber;
- a method for manufacturing a semiconductor device comprising:
- the inert gas supplied from the inert gas supply locator is transferred from the lower side of the region of the substrate held in a laminated state to the substrate holder from the substrate holder. Then, the air flows upward from the region of the substrate held in a stacked state, and is exhausted from the exhaust port (first exhaust port). With this flow and exhaust, foreign matter generated from the mechanism can be exhausted by the vent exhaust port.
- the spare chamber is communicated with the processing chamber and the atmosphere in the spare chamber and the spare chamber is heated. It will be. Therefore, it becomes possible to purge the inert gas supply rocker without disturbing the flow of the inert gas that also flows toward the first exhaust port (vent exhaust port) and the downward force. As a result, foreign matter can be more effectively exhausted, and contamination of the substrate holder region, the processing chamber, and the wafer in the spare chamber can be effectively prevented.
- FIG. 1 (a) is a partially omitted perspective view showing an entire load lock type CVD apparatus according to an embodiment of the present invention.
- FIG. 1 (b) is a partially omitted perspective view showing the side clean unit.
- FIG. 2 is a rear sectional view showing the main part.
- FIG. 3 is a cross-sectional view taken along the line ⁇ - ⁇ in FIG.
- FIG. 4 is a time chart showing opening and closing of a stop valve for an inert gas supply port, a stop valve for a vent exhaust port, and a stop valve for a vacuum exhaust port.
- FIG. 5 is a partially omitted rear cross-sectional view showing when the boat is loaded.
- FIG. 6 is a diagram showing a gas flow in a load lock type CVD apparatus showing a comparative example.
- FIG. 7 is a diagram showing the gas flow of the present embodiment.
- the substrate processing apparatus is a load-lock type CVD apparatus.
- This load-lock type CVD apparatus is used in a film forming process for forming a CVD film on a wafer as a substrate to be processed in an IC manufacturing method.
- the load lock CVD apparatus 10 includes a housing 11.
- a cassette transfer unit 12 is installed on the front surface of the casing 11.
- the cassette transfer unit 12 includes a cassette stage 13 on which two cassettes 2 serving as carriers of the wafer 1 can be placed.
- the cassette 2 that has been transported by an external transport device (not shown) is placed on the cassette stage 13 in a vertical posture (the wafer 1 stored in the cassette 2 is vertical). It is like that.
- the cassette stage 13 is rotated 90 degrees to convert the cassette 2 into the horizontal position.
- a cassette elevator 14 is installed on the rear side of the cassette stage 13, and the cassette elevator 14 is configured to raise and lower the cassette transfer device 15.
- a cassette shelf 17 traversed by a slide stage 16 is installed behind the cassette elevator 14, and a buffer cassette shelf 18 is installed above the cassette shelf 17.
- a wafer transfer equipment 20 is installed so as to be able to rotate and lift.
- the wafer transfer device 20 is configured to transfer a plurality of wafers 1 at a time or one by one.
- a space in which the wafer transfer device 20 in the casing 11 is installed and operable is a transfer chamber 21.
- a rear unit 19 for circulating clean air inside the housing 11 is installed on the rear side of the kaffa cassette shelf 18.
- a side clean unit 19A for circulating clean air to the transfer chamber 21 is installed on the side wall of the housing 11.
- a pressure-resistant housing 22 is installed below the rear end of the housing 11.
- the pressure-resistant casing 22 is formed in a casing having a structure that can withstand pressures below atmospheric pressure (approximately 100,000 Pa) (hereinafter referred to as negative pressure! /).
- the pressure-resistant housing 22 forms a standby chamber 23 that is a load-lock type standby chamber.
- a wafer loading / unloading outlet 24 is opened on the front wall of the pressure-resistant casing 22, and the wafer loading / unloading outlet 24 is opened and closed by a load lock door 25.
- a flange 26 is provided on the ceiling wall of the pressure-resistant housing 22, and a boat loading / unloading port 27 for loading and unloading a boat as a substrate holder is opened on the flange 26. ing.
- the boat loading / unloading port 27 is opened and closed by a shatter 28 which is a load lock type gate valve!
- a heater unit installation chamber 29 is constructed on the pressure-resistant casing 22 by the casing 11, and a heater unit 30 as a heating means is installed in the heater unit installation chamber 29 in the vertical direction.
- the heater unit 30 is formed of a heat insulating layer in a cylindrical shape and a resistance heating element and is disposed on the inner peripheral surface of the heat insulating layer. Heater.
- the heater unit 30 is configured to control the inner space uniformly or over a predetermined temperature distribution, for example, 500 ° C. or more by being controlled by the controller 100.
- a process tube 31 is installed concentrically inside the heater unit 30 !.
- the process tube 31 includes an water tube 32 and an inner tube 33 arranged concentrically with each other.
- the water tube 32 is made of quartz (SiO 2) or silicon carbide (SiC) and closed at the top.
- the lower end is integrally formed into a cylindrical shape.
- the inner tube 33 is made of quartz or silicon carbide, and is formed in a cylindrical shape with both upper and lower ends opened.
- the cylindrical hollow portion of the inner tube 33 forms a processing chamber 34, and the processing chamber 34 is configured to carry in a plurality of wafers held concentrically by a boat. Yes.
- the lower end opening of the inner tube 33 is set to a diameter larger than the maximum outer diameter of the wafer.
- a circular annular exhaust passage 35 is formed by a gap between the outer tube 32 and the inner tube 33.
- a marker 36 is disposed concentrically with the water tube 32 at the lower end of the water tube 32.
- the hold 36 is made of stainless steel and is formed into a short cylindrical shape with both upper and lower openings.
- the water tube 32 Since the holder 36 is supported by the flange 26 provided in the pressure-resistant housing 22, the water tube 32 is in a state of being supported vertically.
- One end of a large-diameter exhaust pipe 37 is connected to the upper portion of the side wall of the holder 36, and the other end of the exhaust pipe 37 is connected to a vacuum exhaust device (not shown).
- the exhaust pipe 37 exhausts an exhaust path 35 formed by a gap between the outer tube 32 and the inner tube 33.
- a gas introduction pipe 38 is inserted into the lower space of the processing chamber 34 so as to communicate with the inside of the processing chamber 34, and the other end of the gas introduction pipe 38 is a gas for supplying an inert gas such as a raw material gas or nitrogen gas.
- a supply device (not shown) or a gas supply device for supplying a processing gas for processing the wafer 1 (see FIG. (Not shown).
- the substrate holder mechanism provided in the standby chamber 23 includes a drive unit and a boat installation unit connected to the drive unit. A boat is installed in the boat installation section.
- the drive unit is a boat elevator 40 that includes a feed screw shaft 40a, a guide shaft 40b, a lifting base 40c, a motor 40d and the like in the standby chamber 23.
- the feed screw shaft 40a is driven by a motor 40d.
- An arm 41 is connected to the lift base 40c of the boat elevator 40, and a base 42 is provided on the arm 41! /.
- a seal cap 43 is horizontally supported on the base 42.
- a seal ring 43 a is disposed around the outside of the seal cap 43.
- the seal cap 43 is formed in a disk shape that is substantially equal to the outer diameter of the flange 26.
- the seal cap 43 is configured to close the bottom end of the flange 26 via the seal ring 43a and seal the boat loading / unloading port 27! RU
- a rotating shaft 45 is passed through the center line of the base 42 in the vertical direction, and the rotating shaft 45 is rotatably supported by a bearing device (not shown).
- the rotating shaft 45 is configured to be rotated by a boat rotation driving motor 44.
- a boat support 46 is horizontally arranged and fixed on the upper end of the rotating shaft 45, and a boat 50 is vertically supported on the boat support 46.
- This arm 41, base 42, seal cap 43, boat rotation drive motor 44, rotation shaft 45, boat cradle 46, seal ring 43a, etc., is used to install the boat 50 in the board holder mechanism. Is formed.
- the boat rotation driving motor 44 related to the rotation mechanism can be omitted.
- the rotating shaft 45 is a fixed shaft that does not rotate.
- the boat 50 includes a pair of end plates 51 and 52 at the top and bottom, and a plurality of holding members 53 arranged vertically between the end plates 51 and 52.
- Each holding member 53 has a plurality of holding grooves 54 arranged at equal intervals in the longitudinal direction.
- the holding grooves 54 of the holding members 53 are arranged so as to open in the same plane.
- the standby chamber 23 is vertically provided with a partition plate 47 that divides the standby chamber 23 into two.
- the partition plate 47 serves as a substrate holder for the standby chamber 23 in the installation area of the boat elevator 40 (hereinafter referred to as the boat elevator area), which is the drive section of the substrate holder mechanism section, and in the board holder mechanism section. It is arranged so as to be divided into an area where the boat 50 is installed (hereinafter referred to as a boat installation area).
- a vertically elongated gap 48 is formed between the pair and the inner surface of the side wall of the standby chamber 23, and both the gaps 48, 48 are within a range in which the arm 41 can be raised and lowered. It is set as narrow as possible. That is, the arm 41 is formed in a bifurcated shape with a wide interval and a small lateral width, and is inserted into the gaps 48 and 48, respectively.
- a plurality of longitudinal grooves 47a are formed in the middle part of the partition plate 47, and cooling water pipes 47b are respectively laid along the longitudinal grooves 47a.
- These cooling water pipes 47b can reduce the influence of heat from the heater unit 30 when the boat is unloaded.
- the longitudinal groove 47a may be omitted.
- An inert gas supply is provided below a region of a plurality of wafers (substrates) held in a stacked state on the boat 50 in the boat installation region of the pressure-resistant housing 22 (hereinafter referred to as a substrate holding region).
- the supply port 61 has been established, and the inert gas supply port 61 can supply inert gas such as nitrogen gas to the standby chamber 23!
- An inert gas supply line 62 is connected to the inert gas supply port 61.
- An inert gas supply device 64 capable of adjusting the gas flow rate is connected to the inert gas supply line 62 via a stop valve 63.
- the inert gas supply device 64 and the stop valve 63 are controlled by the controller 100.
- the inert gas supply line 62 may be extended to the vicinity of the side of the seal cap 43, and a break filter 67 may be provided at the tip thereof.
- This break filter 67 is a porous member, and the inert gas passing through the porous member is removed from the porous member. It is supplied into the waiting room 23 in multiple directions.
- a vent exhaust port 71 which is a first exhaust port for exhausting the inert gas in the standby chamber 23, is opened above the substrate holding region in the boat elevator installation region of the pressure-resistant housing 22.
- a vent line 72 is connected to the vent exhaust port 71.
- An exhaust duct device 74 of an IC manufacturing factory is connected to the vent line 72 via a stop valve 73.
- a pressure gauge 78 is connected to the vent line 72 between the standby chamber 23 and the stop valve 73. Has been. When the pressure gauge 78 detects that the atmospheric pressure is exceeded, the pressure gauge 78 notifies the controller 100 that the atmospheric pressure has been exceeded. As a result, the conditions under which the stop valve 73 can be opened are established, so that the stop valve 73 is opened when an open signal is received from the controller 100.
- the controller 100 When the pressure gauge 78 detects that the pressure is lower than the atmospheric pressure, the condition for opening the stop valve 73 is not satisfied, so the controller 100 does not issue an open signal and the stop valve 73 closes. Alternatively, a closing signal is issued from the controller 100 and the stop valve 73 is closed.
- a vacuum exhaust port (first position) for evacuating the standby chamber 23 is provided at a position facing one gap 48 at the lower end of the pressure-resistant housing 22.
- (Second exhaust port) 81 is established, and an exhaust line 82 is connected to the vacuum exhaust port 81.
- An exhaust device 84 constituted by a vacuum pump is connected to the exhaust line 82 via a stop valve 83. The exhaust device 84 and the stop valve 83 are controlled by the controller 100.
- the cassette 2 storing a plurality of wafers 1 is supplied to the cassette stage 13 of the cassette transfer unit 12 by an external transfer device.
- the supplied cassette 2 becomes horizontal when the cassette stage 13 rotates 90 degrees.
- the cassette 2 in the horizontal posture is transported and transferred by the cassette transfer device 15 to the cassette shelf 17 or the buffer cassette shelf 18.
- the wafer 1 stored in the cassette 2 to be film-formed is loaded into the standby chamber 23 by the wafer transfer device 20 through the wafer loading / unloading port 24 of the pressure-resistant casing 22, and loaded into the boat 50 ( Charged).
- the stop valve 63 of the inert gas supply port 61 is closed and the supply of the inert gas is stopped.
- the stop valve 73 of the vent exhaust port 71 is opened, and the atmosphere of the standby chamber 23 is exhausted (vented).
- the stop valve 83 of the vacuum exhaust port 81 is closed and the evacuation is stopped. Therefore, the atmosphere in the transfer chamber 21 is supplied to the standby chamber 23 via the wafer loading / unloading port 24 and is exhausted from the vent exhaust port 71.
- the transfer chamber 21 is supplied with clean air from the side clean unit 19A, even if the tarine air enters the transfer chamber 21, it does not become a source of contamination. In addition, since clean air flows from the installation area of the boat 50 to the installation area of the boat elevator 40, foreign matter and particles generated from the boat elevator 40 do not flow into the installation area of the boat 50, and contamination occurs. Is suppressed.
- the high temperature atmosphere of the processing chamber 34 is prevented from flowing into the standby chamber 23. For this reason, the wafer 1 being loaded and the loaded wafer 1 are not exposed to a high temperature atmosphere, and the occurrence of harmful effects such as natural oxidation due to the exposure of the wafer 1 to a high temperature atmosphere is prevented.
- the wafer loading / unloading port 24 is closed by the load lock door 25.
- the stop valve 73 of the vent exhaust port 71 is closed, the stop valve 83 of the vacuum exhaust port 81 is opened and evacuated by the exhaust device 84, and the standby chamber 8 3 is depressurized to a predetermined pressure (for example, 200 Pa) (decompression step).
- a predetermined pressure for example, 200 Pa
- the stop valve 63 of the inert gas supply port 61 is closed, and the supply of the inert gas is stopped.
- an inert gas may be supplied very slowly depending on the exhaust device (for example, a turbo molecular pump).
- the stop valve 83 of the vacuum exhaust port 81 is closed, and the vacuuming of the exhaust device 84 is stopped.
- the stop valve 63 of the inert gas supply port 61 is opened, and an inert gas (for example, 100 to 200 liters of nitrogen gas per minute) is supplied to the standby chamber 23, and the air in the standby chamber 23 is supplied by the inert gas. Expelled (inert gas purge step).
- the stop valve 73 of the vent exhaust port 71 is opened and exhausted. Maintain waiting room 23 near atmospheric pressure. As a result, the atmosphere that has entered the standby chamber 23 during loading of the wafer 1 into the boat 50 is discharged from the standby chamber 23.
- the atmosphere in the processing chamber 34 has been replaced by an inert gas in advance, and the pressure is slightly higher than that of the standby chamber 23, so that the atmosphere in the standby chamber 23 can be prevented from entering the processing chamber 34. .
- the stop valve 63 of the inert gas supply port 61 is opened to supply inert gas (nitrogen gas is 100 to 200 liters per minute). Then, the stop valve 73 of the vent exhaust port 71 is opened, and the atmosphere in the standby chamber 23 is exhausted. The stop valve 83 of the vacuum exhaust port 81 is closed.
- an inert gas (for example, 5 to 50 liters of nitrogen gas per minute) is also supplied to the processing chamber 34 from the gas introduction pipe 38. Then, the standby chamber 23 and the processing chamber 34 are maintained near atmospheric pressure.
- the inert gas supplied from the inert gas supply port 61 is lower than the substrate holding region, which is a region of a plurality of substrates held in a stacked state in the boat 50.
- the vent exhaust port 71 first exhaust port
- the vacuum exhaust port 81 second exhaust port
- the stop valve 83 stop valve 83. Therefore, air is exhausted only from the vent exhaust port 71 and exhausted only from the upper side of the substrate holding region, and rectification is performed so as not to disturb the flow of the inert gas from the lower side of the substrate holding region to the upper side of the substrate holding region. It has been.
- the atmosphere of the heated standby chamber 23 will flow in a direction substantially opposite to the flow of the inert gas.
- the air flow due to the exhaust force of the waiting room 23 is disturbed, and foreign matter from the boat elevator 40 in the waiting room 23 is carried from the boat elevator area to the boat installation area, and the wafer 1 is contaminated.
- such a problem can be effectively suppressed, and the wafer 1 can be kept clean throughout the entire substrate holding region.
- the inert gas supply port 61 is provided in the boat installation area and the vent exhaust port 71 is provided in the boat elevator area, the inert gas flows to the boat installation area.
- foreign matter from the boat elevator 40 is prevented from being carried to the boat installation area and contaminating the wafer 1.
- the processing chamber 34 of the process tube 31 is hermetically closed, and is exhausted by the exhaust pipe 37 so as to reach a predetermined pressure, and is heated to a predetermined temperature by the heater unit 30 to be a predetermined raw material.
- Gas is supplied through the gas introduction pipe 38 at a predetermined flow rate.
- the wafer 1 is subjected to heat treatment corresponding to preset processing conditions.
- the boat 50 is rotated by the boat rotation drive motor 44, the source gas is uniformly brought into contact with the surface of the wafer 1, so that the CVD film is uniformly formed on the wafer 1.
- the stop valve 63 of the inert gas supply port 61 is continuously opened, and the stop valve 73 of the vent exhaust port 71 is also continuously opened, so that the standby chamber 23 Atmospheric force S is exhausted, and the stop valve 83 of the vacuum exhaust port 81 is also closed, so that the standby chamber 23 maintains a pressure near atmospheric pressure.
- the stop valve 63 of the inert gas supply port 61 is opened, and the inert gas (nitrogen gas 100 to 200 liters per minute) is opened.
- the stop valve 73 of the vent exhaust port 71 is opened, and the atmosphere of the standby chamber 23 is exhausted.
- the stop valve 83 of the vacuum exhaust port 81 is closed.
- the processing chamber 34 is also supplied with an inert gas (nitrogen gas 5 to 50 liters per minute) from the gas introduction pipe 38.
- the standby chamber 23 and the processing chamber 34 are maintained at atmospheric pressure.
- the inert gas supplied from the inert gas supply port 61 flows from the lower side of the substrate holding region to the upper side of the substrate holding region and vents. Exhaust from exhaust port 71 (first exhaust port)! At this time, exhaust of the vacuum exhaust port 81 (second exhaust port) is stopped by a stop valve 83. Therefore, air is exhausted only from the vent exhaust port 71 and exhausted only from the upper side of the substrate holding region, and rectification is performed so as not to disturb the flow of the inert gas from the lower side of the substrate holding region to the upper side of the substrate holding region. It has been.
- the furnace cap of the processing chamber 34 is opened with the seal cap 43 opened, the radiant heat from the heater unit 30 is radiated to the standby chamber 23 through the furnace port of the processing chamber 34. Further, since the boat 50 and wafer 1 heated by the heater unit 30 (for example, 500 ° C. or more) in the processing chamber 34 and the processing chamber 34 force are also carried out, the thermal radiation from the boat 50 and wafer 1 is discharged. The atmosphere of the waiting room 23 and the waiting room 23 is heated by high temperature and heat convection and becomes high temperature.
- the arm 41 of the substrate holder driving mechanism is lowered to the vicinity of the bottom of the standby chamber 23 (position where the boat unloading is completed), the heated boat 50 and wafer 1 are located on the lower side of the standby chamber 23. Therefore, the action of the atmosphere in the waiting room 23 heated to flow from the lower side of the waiting room 23 to the upper side (the ceiling board side of the waiting room) is Extremely larger than the ding step.
- the atmosphere of the standby chamber 23 flows from the substrate holding area to the lower side than the substrate holding area.
- the atmosphere of the standby chamber 23 heated from the top to the bottom in a direction substantially opposite to the flow of the inert gas will flow.
- the air flow due to the exhaust force of the inert gas in the standby chamber 23 is greatly disturbed, resulting in foreign matter from the boat elevator 40 in the standby chamber 23.
- the amount of contamination on the wafer 1 is increased.
- such a problem can be effectively suppressed, and the wafer 1 can be kept clean throughout the entire substrate holding region.
- the inert gas supply port 61 is provided in the boat installation area and the vent exhaust port 71 is provided in the boat elevator area, the inert gas flows to the boat installation area.
- the foreign matter from the boat elevator 40 is transported to the boat installation area to prevent the wafer 1 from being contaminated.
- the boat loading / unloading port 27 is closed by the shirter 28.
- the stop valve 73 of the vent exhaust port 71 is continuously opened, the stop valve 63 of the inert gas supply port 61 is also continuously opened, and the inert gas flows into the standby chamber 23. To be supplied.
- the fresh inert gas flowing in the standby chamber 23 effectively cools a group of processed wafers that have reached a high temperature.
- a predetermined temperature for example, a temperature that can prevent the formation of a natural oxide film on the surface of wafer 1
- the wafer loading / unloading port 24 in the standby chamber 23 is loaded. Opened by lock door 25.
- the stop valve 63 of the inert gas supply port 61 is closed, and the stop valve 73 of the vent exhaust port 71 is kept open.
- the standby chamber 23 is kept at atmospheric pressure, and clean air from the clean unit 19 is introduced into the standby chamber 23 from the wafer loading / unloading port 24 and exhausted from the vent exhaust port 71.
- the inert gas may continue to be supplied from the inert gas supply port 61 to the standby chamber 23.
- the processed wafer 1 of the boat 50 is removed (discarded) by the wafer transfer device 20 and stored in the empty cassette 2.
- a cassette 2 storing a predetermined number of processed wafers 1 is transferred to the cassette transfer unit 12 by a force set transfer device 15.
- the next batch of wafers 1 is charged from the cassette 2 to the boat 50 by the wafer transfer device 20.
- FIG. 6 is a diagram for explaining the flow of the inert gas in the standby chamber 23 of the conventional apparatus.
- inert gas supply nozzles 65 and 66 are provided, and the inert gas is supplied from the inert gas supply nozzles 65 and 66.
- the inert gas supply nozzles 65 and 66 are perforated nozzles, and are provided with a plurality of gas supply holes along the height direction.
- the atmosphere in the waiting room 23 is exhausted by vent exhaust ports 75, 76, 77 provided in the upper, middle and lower stages of the boat elevator area.
- a partition plate 49 is provided to partition the boat installation area and the boat elevator installation area, and a pair of gaps 48 and 48 are provided adjacent to each other in the center.
- the flow of the inert gas when the inert gas is supplied only from two places above the inert gas supply nozzle 66 is indicated by a flow line 91, and a pair of gaps 48, 48 of the partition plate 49 is provided.
- the inert gas flows through the vent installation port 76, but the inert gas that has not been exhausted flows down. Again, through the pair of gaps 48, 48, the boat elevator installation area forces into the boat area.
- the atmosphere in the boat elevator area flows into the boat area even when only the inert gas is supplied from two places above the inert gas supply nozzle 66, and is generated from the boat elevator 40. It can be seen that the wafer 1 is contaminated by contaminants caused by the particles and grease vapor.
- the contamination of the processing chamber 34 contaminated the wafer processing environment and further increased the amount of contamination of the wafer 1.
- FIG. 7 is a view for explaining the flow of the inert gas in the standby chamber 23 in the present embodiment.
- An inert gas supply port 61 is provided at the lower end of the boat installation area of the standby chamber 23.
- An inert gas is supplied from the inert gas supply port 61.
- the atmosphere in the waiting room 23 is exhausted by a vent exhaust port 71 provided at the upper end of the boat elevator region.
- a partition plate 47 is provided to partition the boat installation area and the boat elevator installation area.
- a pair of gaps 48 and 48 are provided between the side wall of the standby chamber 23 and the left and right ends of the partition plate 47.
- the inert gas flows as indicated by a flow line 92. That is, the inert gas also rises at the bottom of the boat area, and flows in the horizontal direction of the boat area on the lower side of the boat 50 and reaches the partition plate 47. It flows through the gap 48 provided between the lower side and the side wall 23 of the waiting room 23 to the boat area force and the boat elevator area. In the boat elevator region, the air flows upwardly toward the vent exhaust port 71 provided at the upper end of the boat elevator region, and is exhausted from the vent exhaust port 71.
- the boat elevator region force also eliminates the flow of inert gas to the boat region. For this reason, the wafer 1 is not contaminated by contaminants caused by particles generated from the boat elevator 40 or vapor from the grease. Further, contaminants are not involved in the processing chamber 34, and the processing environment of the wafer 1 can be cleaned.
- the break filter 67 is a porous member and can supply inert gas in multiple directions, a larger amount of inert gas can be supplied while further reducing the flow rate of the inert gas. Thus, it is possible to effectively suppress the gas flow that winds up particles precipitated by its own weight on the bottom of the standby chamber 23.
- the inert gas containing the contamination does not blow directly onto the wafer 1.
- a pair of gaps 48, 48 are provided between the partition plate 47 and the side wall of the standby chamber 23 so as to be on the outermost side of the partition plate 47.
- a boat elevator force is generated by disposing the inert gas supply port at the lower end of the boat installation area of the standby room and the vent exhaust port at the upper end of the boat elevator installation area of the standby room. It is possible to prevent foreign matter such as particles and vapors from grease from getting into the processing chamber, and preventing particles that have settled down due to their own weight at the bottom of the waiting room, so that the processing chamber is contaminated by foreign matter from the boat elevator force. In addition, it is possible to prevent particles from adhering to the wafer.
- the inert gas supply port, the vent exhaust port, and the vacuum exhaust port are not limited to being disposed one by one, and may be disposed in plurality.
- the standby chamber 23 is evacuated from the second exhaust port, and as described above, the particles accumulated on the bottom of the standby chamber 23 are prevented from being rolled up.
- the first exhaust port is used when the pressure is increased while exhausting with an inert gas. Even in this case, the pressure in the standby chamber 23 when exhausted at the second exhaust port is lower than the pressure in the standby chamber 23 when exhausted at the first exhaust port. To do.
- the load lock type CVD apparatus has been described in the above embodiment, the present invention can be applied to all substrate processing apparatuses such as a load lock type oxidation apparatus, a diffusion apparatus, and an annealing apparatus.
- the film forming process for forming a CVD film on a wafer has been described according to the IC manufacturing method.
- the present invention provides an oxidation process, a diffusion process, a reflow process, and a using process. It can be applied to various processes of the semiconductor device manufacturing method such as the thermal treatment process.
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Abstract
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Priority Applications (2)
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US11/665,217 US7731797B2 (en) | 2004-11-01 | 2005-10-26 | Substrate treating apparatus and semiconductor device manufacturing method |
JP2006543201A JP4498362B2 (ja) | 2004-11-01 | 2005-10-26 | 基板処理装置および半導体デバイスの製造方法 |
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US (1) | US7731797B2 (ja) |
JP (1) | JP4498362B2 (ja) |
KR (1) | KR100859602B1 (ja) |
CN (1) | CN100456435C (ja) |
TW (1) | TWI329891B (ja) |
WO (1) | WO2006049055A1 (ja) |
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- 2005-10-26 JP JP2006543201A patent/JP4498362B2/ja active Active
- 2005-10-26 KR KR1020077006315A patent/KR100859602B1/ko active IP Right Grant
- 2005-10-26 CN CNB2005800307409A patent/CN100456435C/zh active Active
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WO2023022062A1 (ja) * | 2021-08-17 | 2023-02-23 | 株式会社荏原製作所 | パージ装置およびパージ方法 |
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KR20070044497A (ko) | 2007-04-27 |
US20080134977A1 (en) | 2008-06-12 |
TW200620427A (en) | 2006-06-16 |
JP4498362B2 (ja) | 2010-07-07 |
CN101019213A (zh) | 2007-08-15 |
US7731797B2 (en) | 2010-06-08 |
KR100859602B1 (ko) | 2008-09-23 |
TWI329891B (en) | 2010-09-01 |
JPWO2006049055A1 (ja) | 2008-08-07 |
CN100456435C (zh) | 2009-01-28 |
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