WO2013161106A1 - 被処理基体に対する微粒子付着の制御方法、及び、処理装置 - Google Patents
被処理基体に対する微粒子付着の制御方法、及び、処理装置 Download PDFInfo
- Publication number
- WO2013161106A1 WO2013161106A1 PCT/JP2012/078875 JP2012078875W WO2013161106A1 WO 2013161106 A1 WO2013161106 A1 WO 2013161106A1 JP 2012078875 W JP2012078875 W JP 2012078875W WO 2013161106 A1 WO2013161106 A1 WO 2013161106A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- substrate
- processed
- electrostatic chuck
- voltage
- processing container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Images
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
- 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
-
- 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32192—Microwave generated discharge
-
- 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
- H01J37/32623—Mechanical discharge control means
- H01J37/32642—Focus rings
-
- 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
-
- 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
- H01J37/32798—Further details of plasma apparatus not provided for in groups H01J37/3244 - H01J37/32788; special provisions for cleaning or maintenance of the apparatus
- H01J37/32853—Hygiene
- H01J37/32862—In situ cleaning of vessels and/or internal parts
-
- H10P50/268—
-
- H10P72/72—
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49998—Work holding
Definitions
- the present invention relates to a method for controlling the adhesion of fine particles to a substrate to be processed and a processing apparatus for the substrate to be processed.
- processing such as etching of a substrate to be processed and film formation on the substrate to be processed are performed in a processing apparatus.
- processing such as etching and film formation on the substrate to be processed is performed by generating plasma of a processing gas in the processing container.
- fine particles are generated in the processing container.
- the fine particles are generated by a reaction between a member in the processing container such as an electrostatic chuck or an inner wall of the processing container and plasma of the processing gas.
- Patent Document 1 describes a technique for removing fine particles by applying a voltage to a member in a processing container to scatter fine particles attached to the member.
- a focus ring may be provided so as to surround the electrostatic chuck in order to make the processing on the substrate to be processed uniform.
- the inventor of the present application has found that, in such a processing apparatus, if the substrate to be processed is cleaned before processing, and then the substrate to be processed is transported into the processing container, fine particles may adhere to the substrate to be processed. ing.
- the method for controlling fine particle adhesion includes a step of applying a voltage to an electrostatic chuck for electrostatically adsorbing a substrate to be processed in the processing container before carrying the substrate to be processed into the processing container; And a step of carrying the substrate to be processed into the processing container after the step of applying a voltage to the electrostatic chuck. Further, in the step of applying a voltage to the electrostatic chuck, a voltage is applied to the electrostatic chuck so as to reduce a potential difference between a focus ring provided so as to surround the electrostatic chuck and the substrate to be processed.
- the cause of the fine particles adhering to the substrate to be processed is that the fine particles may move from the focus ring to the substrate to be processed due to the potential difference between the focus ring and the substrate to be processed. Is heading. Therefore, in the method for controlling fine particle adhesion according to one aspect of the present invention, the potential difference between the focus ring and the substrate to be processed is reduced by applying a voltage to the electrostatic chuck. Thus, after the step of applying a voltage to the electrostatic chuck, when the substrate to be processed is carried into the processing container, the fine particles attached to the focus ring due to the potential difference between the focus ring and the substrate to be processed are To adhere to the substrate to be processed.
- the fine particle adhesion control method further includes a step of cleaning the inside of the processing container in a state where the substrate to be processed is not accommodated in the processing container before the step of applying a voltage to the electrostatic chuck. obtain. Thereby, it is possible to reduce the adhesion of the fine particles remaining after the cleaning to the substrate to be processed.
- a step of applying a voltage to the electrostatic chuck can be performed every time before the step of loading the substrate to be processed. In this way, by carrying out the step of applying a voltage to the electrostatic chuck before carrying a new substrate to be processed into the processing container, adhesion of fine particles to the substrate to be processed can be more reliably reduced.
- the step of applying a voltage to the electrostatic chuck has an absolute value smaller than the absolute value of the voltage applied to the electrostatic chuck when the electrostatic chuck electrostatically attracts the substrate to be processed.
- a negative voltage can be applied to the electrostatic chuck.
- the fine particles in the processing container are often positively charged. Therefore, by applying a negative voltage and further setting the absolute value of the voltage to a value smaller than the absolute value of the voltage applied to the electrostatic chuck when performing electrostatic chucking, the fine particles adhere to the substrate to be processed. Can be further reduced.
- a processing apparatus includes an electrostatic chuck provided in a processing container, a DC power source that applies a DC voltage to the electrostatic chuck, and a control unit that controls the DC power source.
- the controller applies a voltage to the electrostatic chuck to reduce a potential difference between the focus ring provided to surround the electrostatic chuck and the substrate to be processed before the substrate to be processed is transferred into the processing container. Control the DC power supply.
- the processing apparatus may further include a gas supply unit that supplies a cleaning gas into the processing container.
- the control unit causes the gas supply unit to supply the cleaning gas before the substrate to be processed is carried into the processing container and before the voltage is applied by the DC power source. Thereby, the reaction by-product in the processing container can be removed by the cleaning gas excited by the plasma.
- control unit may be configured to supply a direct current power supply so that a voltage that reduces a potential difference between the focus ring and the substrate to be processed is applied to the electrostatic chuck before the substrate to be processed is loaded. Can be controlled. In this way, by applying a voltage to the electrostatic chuck with a DC power supply before a new substrate to be processed is carried into the processing container, adhesion of fine particles to the substrate to be processed can be more reliably reduced. .
- the voltage for reducing the potential difference between the focus ring and the substrate to be processed is an absolute value of the voltage applied to the electrostatic chuck when the substrate to be processed is electrostatically attracted by the electrostatic chuck. It can be a negative voltage having a smaller absolute value. In this way, by applying a negative voltage and further setting the absolute value of the voltage to a value smaller than the absolute value of the voltage applied to the electrostatic chuck when performing electrostatic adsorption, the fine particles with respect to the substrate to be processed are set. Can be further reduced.
- adhesion of fine particles to a substrate to be processed can be reduced.
- FIG. 1 It is sectional drawing which shows schematically the plasma processing apparatus which concerns on one Embodiment. It is the top view which looked at the slot board which concerns on one Embodiment from the axis X direction. It is a figure which shows the process of the control which the control part which concerns on one Embodiment performs. It is a figure which shows the state of each part in the processing space before and after carrying in of the to-be-processed base
- FIG. 1 is a diagram schematically showing a plasma processing apparatus according to an embodiment.
- the plasma processing apparatus 10 shown in FIG. 1 includes a processing container 12, a stage 14, a microwave generator 16, an antenna 18, and a dielectric window 20.
- the plasma processing apparatus 10 is a microwave plasma processing apparatus that generates plasma by microwaves from an antenna 18.
- the plasma processing apparatus may be any plasma processing apparatus different from the microwave plasma processing apparatus.
- a parallel plate electrode type plasma processing apparatus, an etching apparatus using plasma, a CVD apparatus using plasma, or the like can be used as an arbitrary plasma processing apparatus.
- the processing container 12 defines a processing space S for performing plasma processing on the substrate W to be processed.
- the processing container 12 may include a side wall 12a and a bottom 12b.
- the side wall 12a has a substantially cylindrical shape extending in the axis X direction (that is, the extending direction of the axis X).
- the bottom 12b is provided on the lower end side of the side wall 12a.
- the bottom 12b is provided with an exhaust hole 12h for exhaust.
- the upper end of the side wall 12a is open.
- the upper end opening of the side wall 12 a is closed by the dielectric window 20.
- An O-ring 21 may be interposed between the dielectric window 20 and the upper end portion of the side wall 12a.
- the O-ring 21 ensures the sealing of the processing container 12 more reliably.
- the side wall 12a is provided with a gate 12g for loading and unloading the substrate W to be processed.
- the microwave generator 16 generates a microwave of 2.45 GHz, for example.
- the plasma processing apparatus 10 further includes a tuner 22, a waveguide 24, a mode converter 26, and a coaxial waveguide 28. Note that the microwave generator 16, the tuner 22, the waveguide 24, the mode converter 26, the coaxial waveguide 28, the antenna 18, and the dielectric window 20 introduce energy for generating plasma into the processing space S. The introductory part is configured.
- the microwave generator 16 is connected to the waveguide 24 via the tuner 22.
- the waveguide 24 is, for example, a rectangular waveguide.
- the waveguide 24 is connected to a mode converter 26, and the mode converter 26 is connected to the upper end of the coaxial waveguide 28.
- the coaxial waveguide 28 extends along the axis X.
- the coaxial waveguide 28 includes an outer conductor 28a and an inner conductor 28b.
- the outer conductor 28a has a substantially cylindrical shape extending in the axis X direction.
- the inner conductor 28b is provided inside the outer conductor 28a.
- the inner conductor 28b has a substantially cylindrical shape extending along the axis X.
- the microwave generated by the microwave generator 16 is guided to the mode converter 26 via the tuner 22 and the waveguide 24.
- the mode converter 26 converts a microwave mode and supplies the microwave after the mode conversion to the coaxial waveguide 28. Microwaves from the coaxial waveguide 28 are supplied to the antenna 18.
- the antenna 18 radiates a microwave for plasma excitation based on the microwave generated by the microwave generator 16.
- the antenna 18 may include a slot plate 30, a dielectric plate 32, and a cooling jacket 34.
- the slot plate 30 has a plurality of slots arranged in the circumferential direction around the axis X.
- FIG. 2 is a plan view of the slot plate according to the embodiment as viewed from the direction of the axis X.
- the slot plate 30 may be a slot plate constituting a radial line slot antenna.
- the slot plate 30 is made of a metal disc having conductivity.
- a plurality of slot pairs 30 a are formed in the slot plate 30.
- Each slot pair 30a includes a slot 30b and a slot 30c extending in a direction intersecting or orthogonal to each other.
- the plurality of slot pairs 30a are arranged at predetermined intervals in the radial direction, and are arranged at predetermined intervals in the circumferential direction.
- the dielectric plate 32 is provided between the slot plate 30 and the lower surface of the cooling jacket 34.
- the dielectric plate 32 is made of, for example, quartz and has a substantially disk shape.
- the surface of the cooling jacket 34 may have conductivity.
- the cooling jacket 34 cools the dielectric plate 32 and the slot plate 30.
- a coolant channel is formed in the cooling jacket 34.
- the lower end of the outer conductor 28 a is electrically connected to the upper surface of the cooling jacket 34.
- the lower end of the inner conductor 28 b is electrically connected to the slot plate 30 through a hole formed in the cooling jacket 34 and the central portion of the dielectric plate 32.
- the microwave from the coaxial waveguide 28 is propagated to the dielectric plate 32 and is introduced into the processing space S from the slot of the slot plate 30 through the dielectric window 20.
- the dielectric window 20 has a substantially disc shape and is made of, for example, quartz.
- the dielectric window 20 is provided between the processing space S and the antenna 18. In one embodiment, the dielectric window 20 is provided immediately below the antenna 18 in the axis X direction.
- a conduit 36 passes through the inner hole of the inner conductor 28b of the coaxial waveguide 28.
- the conduit 36 extends along the axis X and can be connected to a flow splitter 38.
- the plasma processing apparatus 10 may further include an injector 41.
- the injector 41 supplies the gas from the conduit 36 to the through hole 20 h formed in the dielectric window 20.
- the gas supplied to the through hole 20 h of the dielectric window 20 is supplied to the processing space S.
- the plasma processing apparatus 10 may further include a gas supply unit 42.
- the gas supply unit 42 supplies gas from the periphery of the axis X to the processing space S between the stage 14 and the dielectric window 20.
- the gas supply unit 42 may include a conduit 42a.
- the conduit 42 a extends annularly around the axis X between the dielectric window 20 and the stage 14.
- a plurality of gas supply holes 42b are formed in the conduit 42a.
- the plurality of gas supply holes 42b are arranged in an annular shape and open toward the axis X, and supply the gas supplied to the conduit 42a toward the axis X.
- the gas supply unit 42 is connected to the flow splitter 38 via a conduit 46.
- the flow splitter 38 is connected to the conduit 36 and the gas supply unit 42.
- the flow splitter 38 further includes an Ar gas source 38a, an HBr gas source 38b, an O 2 gas source 38c, a Cl 2 gas source 38d, an SF 6 gas source 38e, and an N 2 gas source 38e.
- a gas source 38f of two gases is connected. These gas sources 38a to 38f are gas sources capable of controlling the supply and stop of gas supply and the gas flow rate.
- the flow splitter 38 controls the flow ratio of the gas branched from the gas sources 38a to 38f to the conduit 36 and the gas supply unit 42.
- the SF 6 gas and the O 2 gas are used in a cleaning process for removing reaction byproducts in the processing space S.
- Ar gas, HBr gas, O 2 gas, and Cl 2 gas are used for plasma processing (for example, etching of polysilicon) of the substrate W to be processed.
- the N 2 gas is used as a purge gas that replaces the gas in the processing container 12.
- the gas types listed here are examples, and other types of gases can be used.
- one or more gas sources different from the gas sources described above may be provided, and the processing on the substrate W to be processed may be performed by combining these gases.
- the gas sources 38 c and 38 e constitute a gas supply unit that supplies a cleaning gas into the processing container 12.
- the stage 14 is provided so as to face the dielectric window 20 in the axis X direction.
- the stage 14 is provided so as to sandwich the processing space S between the dielectric window 20 and the stage 14.
- a substrate W to be processed is placed on the stage 14.
- the stage 14 may include a table 14 a, an electrostatic chuck 15, and a focus ring 17.
- the base 14 a is supported by a cylindrical support portion 48.
- the cylindrical support portion 48 is made of an insulating material and extends vertically upward from the bottom portion 12b.
- a conductive cylindrical support 50 is provided on the outer periphery of the cylindrical support 48.
- the cylindrical support portion 50 extends vertically upward from the bottom portion 12 b of the processing container 12 along the outer periphery of the cylindrical support portion 48.
- An annular exhaust passage 51 is formed between the cylindrical support portion 50 and the side wall 12a.
- An annular baffle plate 52 provided with a plurality of through holes is attached to the upper part of the exhaust passage 51.
- An exhaust pipe 54 is connected to the exhaust hole 12h.
- an exhaust device 56b is connected to the exhaust pipe 54 via a pressure regulator 56a.
- the exhaust device 56b has a vacuum pump such as a turbo molecular pump.
- the pressure adjuster 56a adjusts the pressure in the processing container 12 by adjusting the exhaust amount of the exhaust device 56b.
- the exhaust device 56b can reduce the processing space S in the processing container 12 to a desired degree of vacuum.
- the stand 14a also serves as a high-frequency electrode.
- a high frequency power source 58 for RF bias is electrically connected to the base 14 a via a matching unit 60 and a power feeding rod 62.
- the high frequency power supply 58 outputs a predetermined frequency suitable for controlling the energy of ions drawn into the substrate W to be processed, for example, high frequency power of 13.65 MHz at a predetermined power.
- the matching unit 60 accommodates a matching unit for matching between the impedance on the high-frequency power source 58 side and the impedance on the load side such as electrodes, plasma, and the processing container 12.
- This matching unit includes a blocking capacitor for generating a self-bias.
- An electrostatic chuck 15 that is a holding member for holding the substrate to be processed W is provided on the upper surface of the table 14a.
- the electrostatic chuck 15 holds the substrate W to be processed with an electrostatic attraction force.
- a focus ring 17 that surrounds the periphery of the substrate to be processed W and the periphery of the electrostatic chuck 15 in an annular shape is provided.
- the focus ring 17 is mounted on the table 14 a so as to surround the side end surface of the electrostatic chuck 15.
- the focus ring 17 is made of, for example, silicon oxide (SiO 2 ) and is an annular plate.
- the electrostatic chuck 15 has a substantially disk shape.
- the electrostatic chuck 15 includes an electrode 15d and insulating films 15e and 15f formed of aluminum oxide (Al 2 O 3 ).
- the electrode 15d is made of a conductive film, and is provided between the insulating film 15e and the insulating film 15f.
- a high-voltage DC power supply 64 is electrically connected to the electrode 15d through a covered wire 68.
- the electrostatic chuck 15 can hold the substrate to be processed W by a Coulomb force generated by a DC voltage applied from the DC power supply 64.
- An annular refrigerant chamber 14g extending in the circumferential direction is provided inside the table 14a.
- a refrigerant having a predetermined temperature for example, cooling water
- the heat transfer gas of the electrostatic chuck 15, for example, He gas is supplied between the upper surface of the electrostatic chuck 15 and the rear surface of the substrate W to be processed via the gas supply pipe 74 according to the temperature of the refrigerant.
- the plasma processing apparatus 10 may include a control unit 100 that controls each unit. Specifically, the control unit 100 supplies and stops the supply of gas from the gas sources 38a to 38f, controls the flow rate of the gas, controls the generation of microwaves by the microwave generator 16, and the high frequency for RF bias. Control of the power source 58, control of the DC power source 64 for applying a voltage to the electrostatic chuck 15, control of pressure reduction in the processing container 12 by the pressure regulator 56a and the exhaust device 56b, control of loading and unloading of the substrate W to be processed, etc. Do.
- gas is supplied along the axis X into the processing space S from the through hole 20h of the dielectric window 20 through the conduit 36 and the through hole 41h of the injector 41. Further, gas is supplied from the gas supply unit 42 toward the axis X below the through hole 20h. Further, microwaves are introduced from the antenna 18 through the dielectric window 20 into the processing space S and / or the through hole 20 h. Thereby, plasma is generated in the processing space S and / or the through hole 20h. Thus, according to the plasma processing apparatus 10, plasma can be generated without applying a magnetic field. In the plasma processing apparatus 10, the substrate to be processed W placed on the stage 14 can be processed with plasma of a processing gas.
- FIG. 3 is a diagram illustrating a control process performed by the control unit 100.
- FIG. 4 is a diagram illustrating a state of each part from before the substrate to be processed W is loaded into the processing container 12 to immediately after the loading.
- the state where the cleaning process is being performed is indicated by “ON”, and the state where the cleaning process is not being performed is indicated by “OFF”.
- a state where the substrate W to be processed is not carried into the processing container 12 is indicated by “OFF”, and a state where the substrate W is carried into the processing container 12 is indicated by “ON”.
- the control unit 100 controls the gas source 38 f to stop the supply of N 2 gas that has been supplied into the processing container 12 after the previous processing of the substrate W to be processed. (Time t1). Then, the controller 100 executes a cleaning process (step S101) for removing reaction byproducts in the processing container 12 (time t1 to t2) before carrying the substrate W to be processed into the processing container 12.
- WLDC wafer less dry cleaning
- a mixed gas of SF 6 and O 2 is used as a processing gas.
- SF 6 and O 2 are supplied into the processing container 12 by the control unit 100 controlling the gas sources 38e and 38c.
- the control unit 100 executes a voltage application step (step S102) for controlling the DC power source 64 and applying a voltage to the electrostatic chuck 15 before the substrate to be processed W is carried in (time t3).
- a voltage is applied to the electrostatic chuck 15 so that a potential difference between the substrate W to be processed and the focus ring 17 carried into the processing container 12 in a later step is reduced.
- the voltage application step is performed every time before the substrate to be processed W is carried into the processing container 12.
- the pressure regulator 56a controls the pressure of the processing space S to, for example, 200 mTorr (26.7 Pa) based on the pressure of the processing space S measured by the pressure sensor. Also good.
- the focus ring 17 is positively charged before the substrate to be processed W is loaded. This may occur, for example, when positive ions remaining when the plasma generated in the previous cleaning (WLDC processing) process disappears adhere to members in the processing container 12. Further, when the cleaning process is not performed, positive ions remaining when the plasma generated in the process such as the previous etching is extinguished may be caused by adhering to the member in the processing container 12. Further, the substrate to be processed W carried into the processing container 12 may be charged during the conveyance. Therefore, the control unit 100 controls the voltage value of the voltage applied to the electrostatic chuck 15 and the voltage application time so that the potential difference between the charged focus ring 17 and the substrate to be processed W is reduced.
- the control unit 100 applies a minus several hundred volts to the electrostatic chuck 15 for one second.
- the DC power supply 64 is controlled so as to be applied to.
- a negative voltage having an absolute value smaller than the absolute value of the voltage applied to the electrostatic chuck 15 when performing electrostatic adsorption can be set.
- a negative voltage is applied to the electrostatic chuck 15 in the voltage application step.
- a positive voltage is applied to the electrostatic chuck 15.
- the potential difference between the focus ring 17 and the substrate to be processed W can be reduced.
- control unit 100 controls the gas source 38f to stop the supply of the N 2 gas into the processing container 12 and exhaust the processing container 12.
- control unit 100 stops the exhaust in the processing container 12 and executes a loading process (step S103) for loading the substrate to be processed W into the processing container 12 (time t4).
- control unit 100 controls an arm or the like that carries in the substrate to be processed W, and carries the substrate to be processed W onto the electrostatic chuck 15 in the processing container 12 through the gate 12g.
- control unit 100 controls the gas sources 38a to 38d, and Ar gas, HBr gas, O 2 gas, and Cl 2 gas into the processing container 12 are controlled. Start supplying. And the control part 100 performs the plasma generation process (step S104) which act
- the control unit 100 operates the high frequency power source 58 (time t6) to draw ions into the substrate to be processed W, and controls the DC power source 64 to attract and hold the substrate to be processed W by the electrostatic chuck 15.
- the suction holding process (step S105) is executed (time t7).
- the control unit 100 controls the DC power supply 64 so that a positive DC voltage is applied to the electrostatic chuck 15.
- the substrate W to be processed may be attracted and held by the electrostatic chuck 15 at the same time when the microwave generator 16 is operated to generate plasma.
- plasma processing for example, etching or the like
- the control unit 100 controls the gas sources 38a to 38d to stop the supply of Ar gas, HBr gas, O 2 gas, and Cl 2 gas into the processing container 12. Then, the supply of N 2 gas into the processing container 12 is started by controlling the gas source 38f. Further, the control unit 100 stops the generation of the microwave by the microwave generator 16 and stops the output of the high frequency voltage by the high frequency power supply 58. Further, the control unit 100 stops the application of voltage to the electrostatic chuck 15 by controlling the DC power source 64, and releases the suction holding of the substrate W to be processed by the electrostatic chuck 15 (step S107).
- FIG. 5 is a sequence diagram showing the operation timing of the microwave generator 16 and the DC power supply 64.
- the horizontal axis represents time
- the vertical axis represents the microwave output power (W) output from the microwave generator 16 for the dotted line
- the DC voltage applied to the electrostatic chuck 15 by the DC power source 64 for the solid line. (V) is shown. Note that the value of the applied DC voltage shown in FIG. 5 is an example, and the present invention is not limited to this.
- the control unit 100 controls the microwave generator 16 to output a microwave and generate plasma. Thereafter, as indicated by a solid line in the figure, the control unit 100 controls the DC power supply 64 to apply a DC voltage to the electrode 15d of the electrostatic chuck 15. It should be noted that since the substrate to be processed W is not attracted to the electrostatic chuck 15 before the application of the DC voltage to the electrode 15d of the electrostatic chuck 15 is performed, the temperature control is not sufficiently performed. For this reason, it is preferable that the output power of the microwave is lower than that at the time of processing so that the temperature of the substrate to be processed W does not increase due to the action of plasma.
- the control unit 100 controls the microwave generator 16 to change the output power of the microwave.
- the power value is reduced to a lower power value (not 0 W) than when processing is performed.
- the control unit 100 controls the DC power supply 64 to stop the application of the DC voltage to the electrode 15d of the electrostatic chuck 15. Thereafter, the control unit 100 stops the microwave output from the microwave generator 16 and extinguishes the plasma.
- the control unit 100 when the application of the DC voltage to the electrode 15d of the electrostatic chuck 15 is stopped, the control unit 100 once applies a voltage (for example, about ⁇ 2000 V) having a polarity opposite to that when the substrate W is attracted.
- a voltage for example, about ⁇ 2000 V
- the substrate W to be processed is easily removed.
- the reverse polarity voltage is applied as necessary.
- the sequence diagram shown in FIG. 5 can also be applied to control of RF power for plasma excitation in a parallel plate electrode type plasma processing apparatus.
- Step S ⁇ b> 108 the control unit 100 executes an unloading step (Step S ⁇ b> 108) for unloading the substrate to be processed W from the processing container 12.
- the control unit 100 controls an arm or the like that carries out the substrate to be processed W, and carries out the substrate to be processed W from the processing container 12 via the gate 12g.
- step S101 After the unloading process, the process returns to the cleaning process (step S101) and the above-described processing is repeated.
- the controller 100 applies a voltage to the focus ring 17 so that the potential difference between the focus ring 17 and the substrate to be processed W to be loaded is reduced before the substrate to be processed W is loaded.
- the controller 100 applies a voltage to the focus ring 17 so that the potential difference between the focus ring 17 and the substrate to be processed W to be loaded is reduced before the substrate to be processed W is loaded.
- the inventors of the present application perform plasma processing on the substrate to be processed W without performing the above-described voltage application step (step S102) (that is, conventional plasma processing), and the substrate to be processed W after processing is processed.
- step S102 voltage application step
- the substrate to be processed W after processing is processed.
- the voltage application step is performed to reduce the potential difference between the substrate to be processed W and the focus ring 17, so that the fine particles that move from the focus ring 17 to the substrate to be processed W and adhere. And the fine particles adhering to the substrate to be processed W can be effectively reduced.
- one substrate to be processed W is extracted every predetermined number (here, for example, every 25 substrates), and the substrate to be processed W that has been extracted is extracted.
- the particles were counted.
- the substrate to be processed W for counting fine particles may be a fine particle coefficient monitor substrate.
- FIG. 6 shows the result of counting fine particles in one example.
- the lot number is a number assigned to the target substrate W to be counted.
- the fine particles adhering to the target substrate W to be counted were counted without performing the voltage application step.
- FIG. 7 shows the counting result of the fine particles in the comparative example.
- the same process as one Example was performed except not performing a voltage application process.
- FIGS. 6 and 7 in one example (FIG. 6) in which the voltage application process is performed, it adheres to the substrate W to be counted as compared with the comparative example (FIG. 7) in which the voltage application process is not performed. The number of fine particles to be reduced was reduced.
- YFO, ALOF, and SiOF may be generated when the side wall 12a, the electrostatic chuck 15, the focus ring 17, and the like are damaged by the processing gas used in the WLDC.
- more ALOF is detected than in one embodiment. This is because particulate ALOF generated by the electrostatic chuck 15 being damaged by WLDC is deposited on the focus ring 17, and this ALOF is applied to the substrate W to be processed due to a potential difference between the substrate W to be processed and the focus ring 17. It is thought that it adhered.
- the potential difference between the substrate to be processed W and the focus ring 17 is reduced, and the substrate moves from the focus ring 17 to the substrate to be processed W and adheres to the substrate to be processed W. It is considered that the particulate ALOF that is reduced is reduced.
- FIG. 8 shows the number of fine particles adhering to the substrate to be processed W when the voltage applied to the electrostatic chuck 15 is changed, and the uneven distribution of fine particles on the substrate to be processed.
- a substrate made of Bare Si was used as the substrate W to be processed.
- an index indicating how much fine particles are concentrated and adhering to the vicinity of the edge of the substrate to be processed W was used. This index can be obtained by a known statistical method using a P test.
- the bar graph indicates the number of fine particles adhering to the substrate to be processed W
- the line graph indicates an index indicating the uneven distribution of the fine particles on the substrate to be processed.
- the voltage values applied to the electrostatic chuck 15 were five types of ⁇ 2500V, ⁇ 1000V, ⁇ 500V, no voltage applied, and 500V, and each voltage was applied to the electrostatic chuck 15 for 1 second.
- the electrostatic chuck 15 by applying a voltage of ⁇ 500 V to the electrostatic chuck 15, the number of fine particles adhering to the substrate W to be processed was minimized. That is, it is considered that the potential difference between the focus ring 17 and the substrate to be processed W is most reduced.
- the potential difference between the focus ring 17 and the substrate to be processed W is reduced by applying a voltage to the electrostatic chuck 15.
- the substrate to be processed W was carried into the processing container 12
- the substrate was attached to the focus ring 17 due to a potential difference between the focus ring 17 and the substrate to be processed W. It is reduced that the fine particles move to the substrate to be processed W and adhere to the substrate to be processed W.
- a step of cleaning the inside of the processing container 12 without containing the substrate to be processed W in the processing container 12 may be included. Thereby, it is possible to reduce the adhesion of the fine particles remaining after the cleaning to the substrate W to be processed.
- the fine particles in the processing container 12 are often positively charged. Therefore, a negative voltage is applied to the electrostatic chuck 15, and the absolute value of the voltage is set to a value smaller than the absolute value of the voltage applied to the electrostatic chuck 15 when electrostatic chucking is performed. Thus, the adhesion of fine particles to the substrate to be processed W can be further reduced.
- the focus ring may be made of silicon (Si) in addition to silicon oxide, depending on the type of processing gas.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Epidemiology (AREA)
- Public Health (AREA)
- Drying Of Semiconductors (AREA)
- Plasma Technology (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Computer Hardware Design (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- General Physics & Mathematics (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
Abstract
Description
Claims (8)
- 被処理基体を処理容器内に搬入する前に、該処理容器内において被処理基体を静電吸着する静電チャックに電圧を与える工程と、
前記静電チャックに電圧を与える工程の後に、前記処理容器内に被処理基体を搬入する工程と、
を含み、
前記静電チャックに電圧を与える工程では、前記静電チャックを囲むように設けられたフォーカスリングと被処理基体との間の電位差を低減するよう、前記静電チャックに電圧が与えられる、
被処理基体に対する微粒子付着の制御方法。 - 前記静電チャックに電圧を与える工程の前に、前記処理容器内に被処理基体を収容していない状態で、前記処理容器の内部をクリーニングする工程を更に含む、請求項1に記載の被処理基体に対する微粒子付着の制御方法。
- 被処理基体を搬入する前記工程の前に毎回、前記静電チャックに電圧を与える工程が行われる、請求項1又は2に記載の被処理基体に対する微粒子付着の制御方法。
- 前記静電チャックに電圧を与える工程では、前記静電チャックが被処理基体を静電吸着するときに前記静電チャックに与えられる電圧の絶対値よりも小さい絶対値を有する負の電圧が前記静電チャックに与えられる、請求項1~3のいずれか一項に記載の被処理基体に対する微粒子付着の制御方法。
- 処理容器と、
前記処理容器内に設けられた静電チャックと、
前記静電チャックに直流電圧を与える直流電源と、
前記直流電源を制御する制御部と、
を備え、
前記制御部は、前記処理容器内に被処理基体が搬送される前に、前記静電チャックを囲むように設けられたフォーカスリングと被処理基体との間の電位差を低減する電圧が前記静電チャックに与えられるよう、前記直流電源を制御する、
処理装置。 - 前記処理容器内にクリーニングガスを供給するガス供給部を更に備え、
前記制御部は、前記処理容器内に被処理基体が搬入される前であり、且つ、前記直流電源によって前記電圧が与えられる前に、前記ガス供給部に前記クリーニングガスを供給させる、
請求項5に記載の処理装置。 - 前記制御部は、被処理基体が搬入される前に毎回、前記フォーカスリングと被処理基体との間の電位差を低減する電圧が前記静電チャックに与えられるよう、前記直流電源を制御する、請求項5又は6に記載の処理装置。
- 前記フォーカスリングと被処理基体との間の電位差を低減する電圧は、前記静電チャックによって被処理基体を静電吸着するときに前記静電チャックに与えられる電圧の絶対値よりも小さい絶対値を有する負の電圧である、請求項5~7のいずれか一項に記載の処理装置。
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201280071768.7A CN104205306B (zh) | 2012-04-25 | 2012-11-07 | 控制微粒附着在被处理基体上的方法和处理装置 |
| EP12875448.8A EP2843690B1 (en) | 2012-04-25 | 2012-11-07 | Method for control of adherence of microparticles to base material to be processed, and processing device |
| US14/387,654 US9892951B2 (en) | 2012-04-25 | 2012-11-07 | Method of controlling adherence of microparticles to substrate to be processed, and processing apparatus |
| KR1020147026974A KR102036944B1 (ko) | 2012-04-25 | 2012-11-07 | 피처리 기체에 대한 미립자 부착의 제어 방법, 및 처리 장치 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012100213A JP5976377B2 (ja) | 2012-04-25 | 2012-04-25 | 被処理基体に対する微粒子付着の制御方法、及び、処理装置 |
| JP2012-100213 | 2012-04-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2013161106A1 true WO2013161106A1 (ja) | 2013-10-31 |
Family
ID=49482468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/078875 Ceased WO2013161106A1 (ja) | 2012-04-25 | 2012-11-07 | 被処理基体に対する微粒子付着の制御方法、及び、処理装置 |
Country Status (7)
| Country | Link |
|---|---|
| US (1) | US9892951B2 (ja) |
| EP (1) | EP2843690B1 (ja) |
| JP (1) | JP5976377B2 (ja) |
| KR (1) | KR102036944B1 (ja) |
| CN (1) | CN104205306B (ja) |
| TW (1) | TWI567862B (ja) |
| WO (1) | WO2013161106A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946163A (zh) * | 2016-10-13 | 2018-04-20 | 应用材料公司 | 将氧化钇化学转化为氟化钇及氟氧化钇以发展用于等离子体部件的预处理的抗腐蚀涂层 |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6397680B2 (ja) * | 2014-07-24 | 2018-09-26 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置およびプラズマ処理装置の運転方法 |
| JP6357436B2 (ja) * | 2014-07-25 | 2018-07-11 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置 |
| JP6462283B2 (ja) | 2014-09-11 | 2019-01-30 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置 |
| TWI593473B (zh) * | 2015-10-28 | 2017-08-01 | 漢辰科技股份有限公司 | 清潔靜電吸盤的方法 |
| JP6861579B2 (ja) * | 2017-06-02 | 2021-04-21 | 東京エレクトロン株式会社 | プラズマ処理装置、静電吸着方法および静電吸着プログラム |
| JP6851270B2 (ja) * | 2017-06-16 | 2021-03-31 | 東京エレクトロン株式会社 | 静電吸着方法 |
| JP7122864B2 (ja) * | 2018-05-14 | 2022-08-22 | 東京エレクトロン株式会社 | クリーニング方法及び基板処理装置 |
| WO2020072195A2 (en) * | 2018-10-01 | 2020-04-09 | Tokyo Electron Limited | Apparatus and method to electrostatically remove foreign matter from substrate surfaces |
| US20210210355A1 (en) * | 2020-01-08 | 2021-07-08 | Tokyo Electron Limited | Methods of Plasma Processing Using a Pulsed Electron Beam |
| US20220119952A1 (en) * | 2020-10-20 | 2022-04-21 | Applied Materials, Inc. | Method of reducing defects in a multi-layer pecvd teos oxide film |
| US20230060192A1 (en) * | 2021-09-02 | 2023-03-02 | Entegris, Inc. | Methods and apparatus for processing an electrostatic chuck |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09120988A (ja) * | 1995-08-24 | 1997-05-06 | Tokyo Electron Ltd | プラズマ処理方法 |
| WO2003009363A1 (fr) * | 2001-07-10 | 2003-01-30 | Tokyo Electron Limited | Processeur a plasma et procede de traitement au plasma |
| JP2005101539A (ja) | 2003-08-25 | 2005-04-14 | Tokyo Electron Ltd | 減圧処理室内の部材清浄化方法および基板処理装置 |
| JP2005286027A (ja) * | 2004-03-29 | 2005-10-13 | Tokyo Electron Ltd | プラズマ処理装置及び方法 |
| JP2007208302A (ja) * | 2007-05-15 | 2007-08-16 | Tokyo Electron Ltd | プラズマ処理方法及びプラズマ処理装置 |
| JP2011099156A (ja) * | 2009-11-09 | 2011-05-19 | Tokyo Electron Ltd | 搬送アームの洗浄方法、基板処理装置の洗浄方法及び基板処理装置 |
| JP2012204644A (ja) * | 2011-03-25 | 2012-10-22 | Tokyo Electron Ltd | プラズマ処理装置及びプラズマ処理方法 |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0141659B1 (ko) * | 1993-07-19 | 1998-07-15 | 가나이 쓰토무 | 이물제거 방법 및 장치 |
| US5507874A (en) * | 1994-06-03 | 1996-04-16 | Applied Materials, Inc. | Method of cleaning of an electrostatic chuck in plasma reactors |
| US5997962A (en) * | 1995-06-30 | 1999-12-07 | Tokyo Electron Limited | Plasma process utilizing an electrostatic chuck |
| US5746928A (en) * | 1996-06-03 | 1998-05-05 | Taiwan Semiconductor Manufacturing Company Ltd | Process for cleaning an electrostatic chuck of a plasma etching apparatus |
| US5942039A (en) * | 1997-05-01 | 1999-08-24 | Applied Materials, Inc. | Self-cleaning focus ring |
| JP2003506996A (ja) * | 1998-10-14 | 2003-02-18 | デルシス ファーマシューティカル コーポレーション | 面積を整合させた複数の電極を用いた静電感知チャック |
| JP2003332304A (ja) * | 2002-05-17 | 2003-11-21 | Sony Corp | ドライエッチング装置のクリーニング方法 |
| CN101303998B (zh) * | 2003-04-24 | 2011-02-02 | 东京毅力科创株式会社 | 等离子体处理装置、聚焦环和基座 |
| US20040261946A1 (en) * | 2003-04-24 | 2004-12-30 | Tokyo Electron Limited | Plasma processing apparatus, focus ring, and susceptor |
| JP2005039004A (ja) * | 2003-07-18 | 2005-02-10 | Hitachi High-Technologies Corp | プラズマエッチング装置およびプラズマエッチング方法 |
| JP4418193B2 (ja) * | 2003-08-22 | 2010-02-17 | 東京エレクトロン株式会社 | パーティクル除去装置及びパーティクル除去方法及びプラズマ処理装置 |
| JP2005303099A (ja) * | 2004-04-14 | 2005-10-27 | Hitachi High-Technologies Corp | プラズマ処理装置およびプラズマ処理方法 |
| JP5189859B2 (ja) * | 2008-03-05 | 2013-04-24 | 株式会社日立ハイテクノロジーズ | プラズマ処理方法 |
-
2012
- 2012-04-25 JP JP2012100213A patent/JP5976377B2/ja active Active
- 2012-11-07 US US14/387,654 patent/US9892951B2/en active Active
- 2012-11-07 CN CN201280071768.7A patent/CN104205306B/zh active Active
- 2012-11-07 WO PCT/JP2012/078875 patent/WO2013161106A1/ja not_active Ceased
- 2012-11-07 EP EP12875448.8A patent/EP2843690B1/en active Active
- 2012-11-07 KR KR1020147026974A patent/KR102036944B1/ko active Active
-
2013
- 2013-04-24 TW TW102114510A patent/TWI567862B/zh active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09120988A (ja) * | 1995-08-24 | 1997-05-06 | Tokyo Electron Ltd | プラズマ処理方法 |
| WO2003009363A1 (fr) * | 2001-07-10 | 2003-01-30 | Tokyo Electron Limited | Processeur a plasma et procede de traitement au plasma |
| JP2005101539A (ja) | 2003-08-25 | 2005-04-14 | Tokyo Electron Ltd | 減圧処理室内の部材清浄化方法および基板処理装置 |
| JP2005286027A (ja) * | 2004-03-29 | 2005-10-13 | Tokyo Electron Ltd | プラズマ処理装置及び方法 |
| JP2007208302A (ja) * | 2007-05-15 | 2007-08-16 | Tokyo Electron Ltd | プラズマ処理方法及びプラズマ処理装置 |
| JP2011099156A (ja) * | 2009-11-09 | 2011-05-19 | Tokyo Electron Ltd | 搬送アームの洗浄方法、基板処理装置の洗浄方法及び基板処理装置 |
| JP2012204644A (ja) * | 2011-03-25 | 2012-10-22 | Tokyo Electron Ltd | プラズマ処理装置及びプラズマ処理方法 |
Non-Patent Citations (1)
| Title |
|---|
| See also references of EP2843690A4 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107946163A (zh) * | 2016-10-13 | 2018-04-20 | 应用材料公司 | 将氧化钇化学转化为氟化钇及氟氧化钇以发展用于等离子体部件的预处理的抗腐蚀涂层 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104205306B (zh) | 2017-07-18 |
| KR102036944B1 (ko) | 2019-10-25 |
| KR20150011794A (ko) | 2015-02-02 |
| US20150075566A1 (en) | 2015-03-19 |
| US9892951B2 (en) | 2018-02-13 |
| EP2843690A4 (en) | 2015-10-21 |
| TW201401425A (zh) | 2014-01-01 |
| TWI567862B (zh) | 2017-01-21 |
| CN104205306A (zh) | 2014-12-10 |
| JP5976377B2 (ja) | 2016-08-23 |
| EP2843690A1 (en) | 2015-03-04 |
| EP2843690B1 (en) | 2020-01-22 |
| JP2013229445A (ja) | 2013-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5976377B2 (ja) | 被処理基体に対する微粒子付着の制御方法、及び、処理装置 | |
| JP4418193B2 (ja) | パーティクル除去装置及びパーティクル除去方法及びプラズマ処理装置 | |
| US10410902B2 (en) | Plasma processing apparatus | |
| CN111668085B (zh) | 等离子体处理装置 | |
| TWI440124B (zh) | A placing device, a plasma processing device, and a plasma processing method | |
| US9253862B2 (en) | Plasma processing method and plasma processing apparatus | |
| KR100782621B1 (ko) | 플라즈마 처리 방법 및 플라즈마 처리 장치 | |
| US10497545B2 (en) | Plasma processing apparatus and cleaning method | |
| US20240063000A1 (en) | Method of cleaning plasma processing apparatus and plasma processing apparatus | |
| US20250191877A1 (en) | Plasma processing apparatus and plasma processing method | |
| JP4642809B2 (ja) | プラズマ処理方法及びプラズマ処理装置 | |
| JP6273188B2 (ja) | プラズマ処理方法 | |
| JP2018026194A (ja) | プラズマ処理装置およびプラズマ処理方法 | |
| US7955514B2 (en) | Plasma processing apparatus and plasma processing method | |
| JP2007324154A (ja) | プラズマ処理装置 | |
| JP7612889B2 (ja) | ウエハ処理方法 | |
| JP2002164325A (ja) | パーティクル付着抑制方法 | |
| JP2010205872A (ja) | プラズマクリーニング方法 |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 12875448 Country of ref document: EP Kind code of ref document: A1 |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 14387654 Country of ref document: US Ref document number: 2012875448 Country of ref document: EP |
|
| ENP | Entry into the national phase |
Ref document number: 20147026974 Country of ref document: KR Kind code of ref document: A |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |