WO2010095299A1 - プラズマ処理装置の基板支持台 - Google Patents
プラズマ処理装置の基板支持台 Download PDFInfo
- Publication number
- WO2010095299A1 WO2010095299A1 PCT/JP2009/066065 JP2009066065W WO2010095299A1 WO 2010095299 A1 WO2010095299 A1 WO 2010095299A1 JP 2009066065 W JP2009066065 W JP 2009066065W WO 2010095299 A1 WO2010095299 A1 WO 2010095299A1
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- WIPO (PCT)
- Prior art keywords
- substrate
- flange
- plasma processing
- processing apparatus
- substrate support
- Prior art date
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- 239000000758 substrate Substances 0.000 title claims abstract description 119
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 9
- 239000000956 alloy Substances 0.000 claims abstract description 9
- 238000010438 heat treatment Methods 0.000 claims abstract description 4
- 230000002093 peripheral effect Effects 0.000 claims description 23
- 238000001179 sorption measurement Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims description 4
- 239000011737 fluorine Substances 0.000 claims description 4
- 229910052731 fluorine Inorganic materials 0.000 claims description 4
- 239000002826 coolant Substances 0.000 claims description 3
- 239000010408 film Substances 0.000 description 11
- 239000004065 semiconductor Substances 0.000 description 8
- 238000007789 sealing Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 6
- 238000005268 plasma chemical vapour deposition Methods 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 4
- 230000003247 decreasing effect Effects 0.000 description 4
- 229910000833 kovar Inorganic materials 0.000 description 4
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- PIGFYZPCRLYGLF-UHFFFAOYSA-N Aluminum nitride Chemical compound [Al]#N PIGFYZPCRLYGLF-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 238000001020 plasma etching Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 description 1
- 238000002161 passivation Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- TXEYQDLBPFQVAA-UHFFFAOYSA-N tetrafluoromethane Chemical compound FC(F)(F)F TXEYQDLBPFQVAA-UHFFFAOYSA-N 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
Classifications
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- 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
- H01L21/683—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 supporting or gripping
-
- 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
- C23C16/458—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 characterised by the method used for supporting substrates in the reaction chamber
- C23C16/4582—Rigid and flat substrates, e.g. plates or discs
- C23C16/4583—Rigid and flat substrates, e.g. plates or discs the substrate being supported substantially horizontally
- C23C16/4586—Elements in the interior of the support, e.g. electrodes, heating or cooling devices
-
- 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
- C23C16/458—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 characterised by the method used for supporting substrates in the reaction chamber
-
- 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
- C23C16/458—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 characterised by the method used for supporting substrates in the reaction chamber
- C23C16/4581—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 characterised by the method used for supporting substrates in the reaction chamber characterised by material of construction or surface finish of the means for supporting the substrate
-
- 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
- C23C16/46—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 characterised by the method used for heating the substrate
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J37/00—Discharge tubes with provision for introducing objects or material to be exposed to the discharge, e.g. for the purpose of examination or processing thereof
- H01J37/32—Gas-filled discharge tubes
- H01J37/32431—Constructional details of the reactor
- H01J37/32715—Workpiece holder
- H01J37/32724—Temperature
-
- H01L21/205—
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/04—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having potential barriers, e.g. a PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic Table or AIIIBV compounds with or without impurities, e.g. doping materials
- H01L21/30—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26
- H01L21/302—Treatment of semiconductor bodies using processes or apparatus not provided for in groups H01L21/20 - H01L21/26 to change their surface-physical characteristics or shape, e.g. etching, polishing, cutting
- H01L21/306—Chemical or electrical treatment, e.g. electrolytic etching
- H01L21/3065—Plasma etching; Reactive-ion etching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—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 supporting or gripping
- H01L21/6831—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 supporting or gripping using electrostatic chucks
Definitions
- the present invention relates to a substrate support for supporting a substrate in a plasma processing apparatus.
- a substrate made of a semiconductor such as Si (silicon) is supported on a substrate support.
- the substrate support is provided with an electrostatic chuck made of ceramics (for example, aluminum nitride (AlN)) that electrostatically holds the substrate.
- this electrostatic chuck is also provided with a bias electrode for applying a bias to the substrate, and has not only a function of attracting and holding the substrate but also a function of applying a bias. ing.
- an insulating film for a semiconductor device is formed using a plasma CVD apparatus.
- This insulating film for a semiconductor device is required to have high water resistance and heat resistance in order to ensure the reliability of the semiconductor device.
- It is effective to increase the substrate temperature during film formation.
- a substrate support base provided with a large number of dimples 56 on the surface of the electrostatic chuck 51 attached to the support base 50 has been used.
- Reference numeral 52 in the figure is a connection terminal connected to a bias / electrostatic chuck common electrode (not shown) built in the electrostatic chuck 51, and this connection terminal 52 passes through the central portion of the support base 50.
- a vacuum in the vacuum chamber is maintained by sealing with an O-ring groove 54 and an O-ring 55 provided in the opening 53.
- the temperature of the substrate W is greatly affected by heat input from the outside.
- the bias power applied to the substrate W is changed, the temperature of the substrate W also changes. there were.
- plasma P is generated in the vacuum chamber and a bias is applied to the electrostatically attracted substrate W, as shown in the time chart of FIG. 4B, times t1 and t2 during film formation.
- the temperature of the substrate W increases as the bias power increases due to the influence of the applied bias power, and the temperature of the substrate W decreases as the bias power decreases. It was difficult to control the temperature stably.
- the present invention has been made in view of the above problems, and an object thereof is to provide a substrate support for a plasma processing apparatus that stably controls a substrate at a relatively high temperature.
- the substrate support of the plasma processing apparatus for solving the above-mentioned problems is An electrostatic adsorption plate containing a first electrode for electrostatically adsorbing the substrate, a second electrode for applying a bias to the substrate, and a heater for heating the substrate; A cylindrical flange made of an alloy welded to the lower surface of the electrostatic adsorption plate and having the same thermal characteristics as the electrostatic adsorption plate; A seal member on a surface facing the lower surface of the flange, and a support base to which the flange is attached via the seal member;
- the bias power supplied to the second electrode is changed, the heater power supplied to the heater is changed so that the temperature of the substrate becomes constant. For example, when the bias power is increased, the heater power is decreased, and when the bias power is decreased, the heater power is increased to make the substrate temperature constant.
- the substrate support of the plasma processing apparatus according to the second invention for solving the above-mentioned problems is as follows.
- the flange has a height that forms a temperature gradient in which the temperature of the lower surface of the flange is 200 ° C. or less.
- a substrate support for a plasma processing apparatus according to a third invention for solving the above-mentioned problems is
- the outer peripheral surface of the flange is coated with a coating material having high plasma resistance against the plasma of a fluorine-based gas.
- a substrate support for a plasma processing apparatus according to a fourth invention for solving the above-described problems is In the substrate support of the plasma processing apparatus according to any one of the first to third inventions, A ring-shaped member is provided on the upper surface of the support base on the outer peripheral side of the flange so that a gap between the outer peripheral surface of the flange and the lower surface of the electrostatic attraction plate is 0.5 mm or more and 2.0 mm or less. It is characterized by.
- a substrate support for a plasma processing apparatus for solving the above-described problem is In the substrate support of the plasma processing apparatus according to any one of the first to fourth inventions, A first connection terminal connected to the first electrode, a second connection terminal connected to the second electrode, and a third connection terminal connected to the heater are arranged on the inner peripheral side of the flange, and the first electrode The first connection terminal, the second connection terminal, and the third connection terminal are arranged on the atmosphere side on the inner peripheral side of the flange by connecting to the second electrode and the heater, respectively. .
- a substrate support for a plasma processing apparatus for solving the above-described problem
- a flow path is provided in the support base, and a coolant for cooling the support base flows through the flow path.
- the electrostatic attraction plate when a cylindrical flange is welded to the lower surface of the electrostatic attraction plate, the electrostatic attraction plate is attached to the support base via the flange, and when the bias power is changed, Since the heater power is changed so that the temperature of the substrate becomes constant, the substrate can be stably controlled at a relatively high temperature (for example, 300 ° C. to 400 ° C.). As a result, for example, with a plasma CVD apparatus, a thin film with good film quality can be formed. Even when the temperature of the substrate is relatively high, the temperature around the seal member on the lower surface of the flange is low, so that an O-ring can be used as the seal member, and the maintainability is improved.
- a relatively high temperature for example, 300 ° C. to 400 ° C.
- the outer peripheral surface of the flange is coated with a material having high plasma resistance, corrosion of the flange itself can be suppressed.
- the ring-shaped member having a gap between the flange outer peripheral surface and the electrostatic adsorption plate lower surface of 0.5 mm or more and 2.0 mm or less is provided on the upper surface of the support base on the flange outer periphery side, Discharge on the lower surface of the suction plate can be prevented.
- the first electrode, the second electrode, and the heater are connected to the first connection terminal, the second connection terminal, and the third connection terminal on the flange inner peripheral side, that is, the atmosphere side. It is possible to prevent discharge at the first connection terminal, the second connection terminal, and the third connection terminal.
- the temperature of the seal member can be further lowered and the life of the seal member can be extended.
- (A) is a longitudinal cross-sectional view which shows an example of embodiment of the substrate support stand of the plasma processing apparatus which concerns on this invention
- (b) is a time chart explaining an example of the control in the substrate support stand. It is a longitudinal cross-sectional view which shows another example of embodiment of the substrate support stand of the plasma processing apparatus which concerns on this invention. It is a longitudinal cross-sectional view which shows another example of embodiment of the substrate support stand of the plasma processing apparatus which concerns on this invention.
- (A) is a longitudinal cross-sectional view of the board
- FIG. 1A is a longitudinal sectional view showing an example of an embodiment of a substrate support of a plasma processing apparatus according to the present invention
- FIG. 1B illustrates an example of control in the substrate support. It is a time chart.
- the substrate support of this embodiment is arranged in a vacuum chamber of a plasma processing apparatus (for example, a plasma CVD apparatus, a plasma etching apparatus, etc.).
- the configuration other than the substrate support is omitted.
- the substrate support of this embodiment includes a metal (for example, aluminum) support 10 disposed inside a vacuum chamber (vacuum chamber), and an electrostatic chuck 14 (electrostatic) attached to the upper surface of the support 10. Adsorption plate).
- a cylindrical flange 13 is provided at the lower portion of the electrostatic chuck 14. The lower portion of the flange 13 is formed in an L-shaped cross section, and the lower surface thereof is disposed on the upper surface of the support base 10.
- An O-ring groove 11 is provided at a position on the upper surface of the support 10 facing the lower surface of the flange 13, and an O-ring 12 (seal member) is disposed in the O-ring groove 11.
- the O-ring groove 11, the O-ring 12 and the flange 13 are interposed between the support 10 and the electrostatic chuck 14, and the electrostatic chuck 14 is supported via the O-ring groove 11, the O-ring 12 and the flange 13. It is attached to the upper surface of the base 10.
- the electrostatic chuck 14 is formed of ceramics (for example, aluminum nitride (AlN)) that electrostatically holds and holds a substrate W made of a semiconductor such as Si (silicon), and an electrostatic chuck electrode (
- a bias electrode second electrode; not shown) for applying a bias to the substrate
- a heater for controlling the temperature of the substrate, and the like are provided. Is also provided inside. That is, the electrostatic chuck 14 has not only the function of holding the substrate by suction but also the function of bias application and temperature control.
- the electrostatic chuck electrode and the bias electrode can share one electrode. In this embodiment, one electrode is shared.
- the entire surface of the electrostatic chuck 14 is flat and has a surface roughness Ra of 0.8 or less.
- the flange 13 is welded to the lower surface of the electrostatic chuck 14 by brazing or the like, and the electrostatic chuck 14 and the flange 13 are integrated. That is, there is no gap between the flange 13 and the electrostatic chuck 14, and the substrate support table is sealed by the O-ring 12 on the lower surface of the flange 13 and the upper surface of the support table 10. Is sealed as the vacuum chamber side, and the inner peripheral side of the O-ring 12 is the atmosphere side.
- the electrostatic chuck 14 and the flange 13 are fixed by attaching the lower portion of the flange 13 to the support base 10 with bolts near the O-ring 12.
- the flange 13 is made of Kovar (registered trademark), which is a Co—Fe—Ni alloy having thermal properties close to those of the ceramic electrostatic chuck 14 in consideration of thermal stress. It should be noted that other alloys such as 42 alloy, NSL, etc. may be used as long as they have similar thermal properties to the ceramic electrostatic chuck 14.
- the flange 13 is formed with a thin wall thickness (for example, 0.5 mm thick) except for a lower portion fixed to the support base 10 and a predetermined distance between the electrostatic chuck 14 and the support base 10. Is formed. By reducing the thickness of the flange 13, the flange 13 itself becomes a heat transfer resistance. Further, by placing a distance between the electrostatic chuck 14 and the support 10, a temperature gradient is formed in the flange 13 itself, and the sealing surface (the surface in contact with the O-ring 12) is used as the substrate W and the electrostatic chuck. The position is away from 14.
- a thin wall thickness for example, 0.5 mm thick
- the inner diameter of the flange 13 should be as small as possible. This is because the inner peripheral side of the flange 13 is the atmosphere side, but when the inside of the vacuum chamber is evacuated, the force from the atmospheric pressure acts on the part where the electrostatic chuck 13 faces the atmospheric pressure, and the inner diameter is large. This is because it takes so much power. Therefore, the inner diameter of the flange 13 is reduced, the area of the portion where the electrostatic chuck 13 faces the atmospheric pressure is reduced, and the force by which the atmospheric pressure pushes up the electrostatic chuck 13 is reduced.
- Heat transfer from the substrate W and the electrostatic chuck 14 side is performed almost via the flange 13, but by adopting the above-described structure for the flange 13, the support W 10 side from the substrate W and the electrostatic chuck 14 side.
- the heat transfer to is suppressed and a temperature gradient is formed.
- the sealing surface can be made lower than the heat resistant temperature of the O-ring 12.
- the flange 13 is determined to have a height that forms a temperature gradient in which the temperature of the lower surface of the flange 13 is equal to or lower than the heat resistance temperature of the O-ring 12. For example, when the temperature of the substrate W is controlled at 400 ° C., if the height of the flange 13 is set to 25 mm or more, the temperature of the lower surface of the flange 13 is set to 200 ° C. or less which is the heat resistant temperature of the O-ring 12. it can. Thus, the height of the flange 13 is determined according to the control temperature of the substrate W.
- an opening 17 penetrating the support base 10 is provided at the center of the support base 10.
- the opening 17 is on the inner peripheral side of the O-ring 12 and communicates with the hollow portion of the flange 13.
- the common connection terminal 19 first and second connection terminals
- the heater connection terminal 20 third connection terminal for connecting to the heater are the electrostatic chuck 14. From the lower surface of the flange 13 through the hollow portion of the flange 13 and the opening 17. That is, the common connection terminal 19 and the heater connection terminal 20 are arranged on the atmosphere side on the inner peripheral side of the O-ring 12, in other words, not on the vacuum side. As a result, even if high power and high voltage are applied to the common connection terminal 19 and the heater connection terminal 20, since the surroundings are in the atmosphere, it is possible to prevent the occurrence of discharge.
- a DC voltage is supplied to the common connection terminal 19 to cause the substrate W to be electrostatically attracted to the electrostatic chuck 14, and similarly, high frequency power is supplied to the connection terminal 19 to apply a bias to the substrate W. Since the environment around the shared connection terminal 19 is the atmosphere, the occurrence of discharge can be prevented even when high power and high voltage are applied.
- both the bias connection terminal and the electrostatic chuck connection terminal may be arranged on the inner peripheral side of the O-ring 12. Further, even when a plurality of shared connection terminals 19 are used for high power supply, these may be arranged on the inner peripheral side of the O-ring 12.
- the substrate temperature sensor terminal 21 for detecting the temperature of the substrate W and the chuck temperature sensor terminal 18 for detecting the temperature of the electrostatic chuck 14 are arranged anywhere as long as the temperature of the object can be detected and the sealing property can be maintained. May be.
- the substrate temperature sensor terminal 21 is drawn from the lower surface of the electrostatic chuck 14 through the opening 17, and the chuck temperature sensor terminal 18 is extracted from the lower surface of the electrostatic chuck 14. It extends through the support 10 itself.
- a thermocouple, a radiation thermometer, etc. are used as the substrate temperature sensor and chuck temperature sensor. In the case of a thermocouple, it itself becomes a connection terminal.
- the optical fiber that propagates the infrared rays becomes the connection terminal.
- the support base 10 is formed with a flow path 15 through which the cooling refrigerant 16 flows.
- the temperature and flow rate of the refrigerant 16 flowing in the flow path 15 of the support base 10 are controlled, and the support base 10 itself is desired.
- the temperature of the O-ring 12 itself can be lowered, the life of the O-ring 12 can be extended, and the maintainability can be improved.
- an inexpensive O-ring having low heat resistance can be used.
- the heater power of the electrostatic chuck 14 is controlled by a control device (not shown) in accordance with the control timing of the bias power of the electrostatic chuck 14.
- the temperature of W is stabilized at a high temperature.
- the temperature of the substrate W during the process is made constant so that the heat balance on the substrate W becomes constant.
- the heater power may be changed in accordance with the change of the bias power so that the temperature of the substrate W detected by the substrate temperature sensor becomes constant.
- the temperature of the substrate W can be raised and the temperature can be stabilized.
- a thin film with good film quality can be formed.
- FIG. 2 is a longitudinal sectional view showing another example of the embodiment of the substrate support of the plasma processing apparatus according to the present invention.
- the substrate support of this embodiment is also disposed in the vacuum chamber of the plasma processing apparatus, but here also, the configuration other than the substrate support such as the vacuum chamber and the plasma generation mechanism is omitted from the illustration. ing.
- the same reference numerals are used for the same components as those of the substrate support shown in the first embodiment, and the chuck temperature detection sensor terminal 18, the common connection terminal 19, the heater connection terminal 20, and the substrate temperature detection sensor terminal 21 are used. Is omitted, and duplicated explanation is also omitted.
- the outer peripheral surface and the brazed portion of the flange 13 made of Kovar alloy provided at the lower part of the electrostatic chuck 14, that is, the vacuum side surface is made of a coating material made of a material having high plasma resistance. 22 is coated.
- the high plasma resistance material for example, there is such yttrium oxide (Y 2 O 3) or alumina (Al 2 O 3), if Y 2 O 3, spraying Y 2 O 3 on the outer peripheral surface of the flange 13 Then, coating may be performed.
- the Kovar alloy is an iron (Fe) -based alloy and has low corrosion resistance against the plasma of a fluorine-based gas (for example, carbon tetrafluoride (CF 4 )), which is a cleaning gas used in a plasma CVD apparatus.
- a fluorine-based gas for example, carbon tetrafluoride (CF 4 )
- CF 4 carbon tetrafluoride
- the temperature of the substrate W can be raised and the temperature can be stabilized.
- FIG. 3 is a longitudinal sectional view showing another example of the embodiment of the substrate support of the plasma processing apparatus according to the present invention.
- the substrate support of this embodiment is also disposed in the vacuum chamber of the plasma processing apparatus, but here also, the configuration other than the substrate support such as the vacuum chamber and the plasma generation mechanism is omitted from the illustration. ing.
- the same reference numerals are used for the same components as those of the substrate support shown in the first embodiment, and the chuck temperature detection sensor terminal 18, the common connection terminal 19, the heater connection terminal 20, and the substrate temperature detection sensor terminal 21 are used. Is omitted, and duplicated explanation is also omitted.
- a ring-shaped ring-shaped member 23 made of a metal material (for example, aluminum) equivalent to the support base 10 is provided on the upper surface of the support base 10 on the outer peripheral side of the flange 13. Yes.
- the clearance gap between the electrostatic chuck 14 lower surface and the flange 13 outer peripheral surface, and the ring-shaped member 23 surface is 0.5 mm or more and 2.0 mm or less. This prevents discharge on the lower surface of the electrostatic chuck 14 by setting the gap to 2.0 mm or less.
- the lower limit of the gap is 0.5 mm or more to prevent contact between the electrostatic chuck 14 and the flange 13 and the ring-shaped member 23, and the ring-shaped member 23 side from the electrostatic chuck 14 and the flange 13. Prevents direct heat transfer to.
- the outer diameter of the ring-shaped member 23 may be equal to or larger than that of the electrostatic chuck 14.
- a carbon sheet is interposed between the ring-shaped member 23 and the support base 10 so as to improve the heat transfer coefficient between the ring-shaped member 23 and the support base 10.
- the ring-shaped member 23 itself may be formed integrally with the support base 10.
- the surface of the ring-shaped member 23 is anodized to increase the emissivity (for example, emissivity is 0.7 or more) and improve the radiant heat transfer efficiency. About the heat radiation from, you may make it absorb actively.
- the temperature of the substrate W can be raised and the temperature can be stabilized.
- the present invention is applicable to a plasma processing apparatus for manufacturing an insulating film for a semiconductor device used for an interlayer insulating film, a barrier metal layer, an etch stopper layer, a passivation film, a hard mask, a CAP film, etc. It is suitable when processing is required.
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Abstract
Description
基板を静電的に吸着するための第1電極と、前記基板にバイアスを印加するための第2電極と、前記基板を加熱するためのヒータとを内蔵する静電吸着板と、
前記静電吸着板の下面に溶着され、前記静電吸着板と同等の熱特性を持つ合金からなる筒状のフランジと、
前記フランジの下面に対面する面にシール部材を有し、前記シール部材を介して、前記フランジを取り付ける支持台とを有し、
前記第2電極に供給するバイアスパワーを変更するときには、前記基板の温度が一定となるように、前記ヒータに供給するヒータパワーを変更することを特徴とする。
例えば、バイアスパワーを増やすときには、ヒータパワーを減らし、バイアスパワーを減らすときには、ヒータパワーを増やして、基板温度を一定とすればよい。
上記第1の発明に記載のプラズマ処理装置の基板支持台において、
前記フランジを、当該フランジの下面の温度が200℃以下となる温度勾配を形成する高さとしたことを特徴とする。
上記第1、第2の発明に記載のプラズマ処理装置の基板支持台において、
前記フランジの外周面を、フッ素系ガスのプラズマに対して、プラズマ耐性が高い被覆材で被覆したことを特徴とする。
上記第1~第3のいずれか1つの発明に記載のプラズマ処理装置の基板支持台において、
前記フランジの外周側の前記支持台の上面に、前記フランジの外周面及び前記静電吸着板の下面との隙間が0.5mm以上2.0mm以下となるように、リング状部材を設けたことを特徴とする。
上記第1~第4のいずれか1つの発明に記載のプラズマ処理装置の基板支持台において、
前記第1電極に接続する第1接続端子、前記第2電極に接続する第2接続端子及び前記ヒータに接続する第3接続端子を、前記フランジの内周側に配置して、前記第1電極、前記第2電極及び前記ヒータと各々接続することにより、前記第1接続端子、前記第2接続端子及び前記第3接続端子を前記フランジの内周側の大気側に配置したことを特徴とする。
上記第1~第5のいずれか1つの発明に記載のプラズマ処理装置の基板支持台において、
前記支持台に流路を設け、当該流路に前記支持台を冷却する冷媒を流すようにしたことを特徴とする。
11 Oリング溝
12 Oリング
13 フランジ
14 静電チャック
17 開口部
18 チャック温度検出センサ端子
19 共用接続端子
20 ヒータ接続端子
21 基板温度検出センサ端子
図1(a)は、本発明に係るプラズマ処理装置の基板支持台の実施形態の一例を示す縦断面図であり、又、図1(b)は、その基板支持台における制御の一例を説明するタイムチャートである。なお、本実施例の基板支持台は、プラズマ処理装置(例えば、プラズマCVD装置、プラズマエッチング装置等)の真空チャンバ内に配置されるものであるが、ここでは、真空チャンバやプラズマ発生機構等の基板支持台以外の構成は省略して図示している。
図2は、本発明に係るプラズマ処理装置の基板支持台の実施形態の他の一例を示す縦断面図である。なお、本実施例の基板支持台も、プラズマ処理装置の真空チャンバ内に配置されるものであるが、ここでも、真空チャンバやプラズマ発生機構等の基板支持台以外の構成は省略して図示している。又、実施例1に示した基板支持台の構成と同等のものについては、同じ符号を用い、又、チャック温度検出センサ端子18、共用接続端子19、ヒータ接続端子20及び基板温度検出センサ端子21の図示は省略し、重複する説明も省略する。
図3は、本発明に係るプラズマ処理装置の基板支持台の実施形態の他の一例を示す縦断面図である。なお、本実施例の基板支持台も、プラズマ処理装置の真空チャンバ内に配置されるものであるが、ここでも、真空チャンバやプラズマ発生機構等の基板支持台以外の構成は省略して図示している。又、実施例1に示した基板支持台の構成と同等のものについては、同じ符号を用い、又、チャック温度検出センサ端子18、共用接続端子19、ヒータ接続端子20及び基板温度検出センサ端子21の図示は省略し、重複する説明も省略する。
Claims (6)
- 基板を静電的に吸着するための第1電極と、前記基板にバイアスを印加するための第2電極と、前記基板を加熱するためのヒータとを内蔵する静電吸着板と、
前記静電吸着板の下面に溶着され、前記静電吸着板と同等の熱特性を持つ合金からなる筒状のフランジと、
前記フランジの下面に対面する面にシール部材を有し、前記シール部材を介して、前記フランジを取り付ける支持台とを有し、
前記第2電極に供給するバイアスパワーを変更するときには、前記基板の温度が一定となるように、前記ヒータに供給するヒータパワーを変更するようにしたことを特徴とするプラズマ処理装置の基板支持台。 - 請求項1に記載のプラズマ処理装置の基板支持台において、
前記フランジを、当該フランジの下面の温度が200℃以下となる温度勾配を形成する高さとしたことを特徴とするプラズマ処理装置の基板支持台。 - 請求項1又は請求項2に記載のプラズマ処理装置の基板支持台において、
前記フランジの外周面を、フッ素系ガスのプラズマに対して、プラズマ耐性が高い被覆材で被覆したことを特徴とするプラズマ処理装置の基板支持台。 - 請求項1から請求項3のいずれか1つに記載のプラズマ処理装置の基板支持台において、
前記フランジの外周側の前記支持台の上面に、前記フランジの外周面及び前記静電吸着板の下面との隙間が0.5mm以上2.0mm以下となるように、リング状部材を設けたことを特徴とするプラズマ処理装置の基板支持台。 - 請求項1から請求項4のいずれか1つに記載のプラズマ処理装置の基板支持台において、
前記第1電極に接続する第1接続端子、前記第2電極に接続する第2接続端子及び前記ヒータに接続する第3接続端子を、前記フランジの内周側に配置して、前記第1電極、前記第2電極及び前記ヒータと各々接続することにより、前記第1接続端子、前記第2接続端子及び前記第3接続端子を前記フランジの内周側の大気側に配置したことを特徴とするプラズマ処理装置の基板支持台。 - 請求項1から請求項5のいずれか1つに記載のプラズマ処理装置の基板支持台において、
前記支持台に流路を設け、当該流路に前記支持台を冷却する冷媒を流すようにしたことを特徴とするプラズマ処理装置の基板支持台。
Priority Applications (3)
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US13/202,688 US20120002345A1 (en) | 2009-02-23 | 2009-09-15 | Substrate support table of plasma processing device |
EP09840402A EP2400535A4 (en) | 2009-02-23 | 2009-09-15 | SUBSTRATE MOUNTING TABLE OF A PLASMA PROCESSING DEVICE |
KR1020117019462A KR101316954B1 (ko) | 2009-02-23 | 2009-09-15 | 플라즈마 처리 장치의 기판 지지대 |
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JP2009038820A JP5237151B2 (ja) | 2009-02-23 | 2009-02-23 | プラズマ処理装置の基板支持台 |
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JP (1) | JP5237151B2 (ja) |
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JP5262878B2 (ja) * | 2009-03-17 | 2013-08-14 | 東京エレクトロン株式会社 | 載置台構造及びプラズマ成膜装置 |
US9969022B2 (en) | 2010-09-28 | 2018-05-15 | Applied Materials, Inc. | Vacuum process chamber component and methods of making |
JP5423997B2 (ja) * | 2011-06-13 | 2014-02-19 | 株式会社村田製作所 | 接合装置及び接合方法 |
US9117867B2 (en) * | 2011-07-01 | 2015-08-25 | Applied Materials, Inc. | Electrostatic chuck assembly |
US10727092B2 (en) * | 2012-10-17 | 2020-07-28 | Applied Materials, Inc. | Heated substrate support ring |
JP6186981B2 (ja) * | 2013-07-24 | 2017-08-30 | パナソニック株式会社 | プラズマ処理装置及び方法 |
CN104637838B (zh) * | 2013-11-15 | 2018-06-26 | 中微半导体设备(上海)有限公司 | 一种半导体处理装置 |
CN104752300B (zh) * | 2013-12-31 | 2018-09-18 | 北京北方华创微电子装备有限公司 | 静电卡盘及反应腔室 |
US20150194326A1 (en) * | 2014-01-07 | 2015-07-09 | Applied Materials, Inc. | Pecvd ceramic heater with wide range of operating temperatures |
CN117238742A (zh) * | 2018-06-29 | 2023-12-15 | 东京毅力科创株式会社 | 等离子体处理装置、等离子体状态检测方法以及程序 |
JP7202972B2 (ja) * | 2018-06-29 | 2023-01-12 | 東京エレクトロン株式会社 | プラズマ処理装置、プラズマ状態検出方法およびプラズマ状態検出プログラム |
US11837491B2 (en) | 2018-10-11 | 2023-12-05 | Beijing Naura Microelectronics Equipment Co., Ltd. | Electrostatic chuck and reaction chamber |
CN112899659B (zh) * | 2021-01-19 | 2022-06-14 | 中国科学院半导体研究所 | 用于等离子体化学气相的样品支架 |
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- 2009-08-28 TW TW098129165A patent/TWI406355B/zh not_active IP Right Cessation
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- 2009-09-15 WO PCT/JP2009/066065 patent/WO2010095299A1/ja active Application Filing
- 2009-09-15 EP EP09840402A patent/EP2400535A4/en not_active Withdrawn
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TW201032287A (en) | 2010-09-01 |
TWI406355B (zh) | 2013-08-21 |
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US20120002345A1 (en) | 2012-01-05 |
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