WO2017126662A1 - プラズマ制御装置 - Google Patents
プラズマ制御装置 Download PDFInfo
- Publication number
- WO2017126662A1 WO2017126662A1 PCT/JP2017/001942 JP2017001942W WO2017126662A1 WO 2017126662 A1 WO2017126662 A1 WO 2017126662A1 JP 2017001942 W JP2017001942 W JP 2017001942W WO 2017126662 A1 WO2017126662 A1 WO 2017126662A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- plasma
- power supply
- supply unit
- generating
- voltage
- Prior art date
Links
Images
Classifications
-
- 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
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32174—Circuits specially adapted for controlling the RF discharge
- H01J37/32183—Matching circuits
-
- 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
- H01J37/32082—Radio frequency 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
- H01J37/32009—Arrangements for generation of plasma specially adapted for examination or treatment of objects, e.g. plasma sources
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32146—Amplitude modulation, includes pulsing
-
- 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
- H01J37/32082—Radio frequency generated discharge
- H01J37/32137—Radio frequency generated discharge controlling of the discharge by modulation of energy
- H01J37/32155—Frequency modulation
-
- 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
- H01J37/32917—Plasma diagnostics
- H01J37/3299—Feedback systems
-
- 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 at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer
- H01L21/18—Manufacture or treatment of semiconductor devices or of parts thereof the devices having at least one potential-jump barrier or surface barrier, e.g. PN junction, depletion layer or carrier concentration layer the devices having semiconductor bodies comprising elements of Group IV of the Periodic System 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
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67017—Apparatus for fluid treatment
- H01L21/67063—Apparatus for fluid treatment for etching
- H01L21/67069—Apparatus for fluid treatment for etching for drying etching
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
- H03H7/38—Impedance-matching networks
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/46—Generating plasma using applied electromagnetic fields, e.g. high frequency or microwave energy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/245—Detection characterised by the variable being measured
- H01J2237/24564—Measurements of electric or magnetic variables, e.g. voltage, current, frequency
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/332—Coating
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
- H01J2237/00—Discharge tubes exposing object to beam, e.g. for analysis treatment, etching, imaging
- H01J2237/32—Processing objects by plasma generation
- H01J2237/33—Processing objects by plasma generation characterised by the type of processing
- H01J2237/334—Etching
-
- 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
- H01J37/32082—Radio frequency generated discharge
- H01J37/32091—Radio frequency generated discharge the radio frequency energy being capacitively coupled to the plasma
-
- 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
- H01J37/32082—Radio frequency generated discharge
- H01J37/321—Radio frequency generated discharge the radio frequency energy being inductively coupled to the plasma
Definitions
- the present invention relates to a plasma control apparatus that supplies high-frequency power to a plasma processing apparatus that performs processing using plasma such as etching processing on a substrate.
- the present invention can realize impedance matching between the power supply unit and the plasma at a high speed even when the impedance of the plasma changes due to a change in the state of the plasma.
- the present invention relates to a plasma control apparatus capable of performing processing using highly accurate and stable plasma by realizing stable current control.
- a chamber C, an element 10 for generating plasma P in the chamber C and an element 10 for generating plasma P in the chamber C, and a substrate S are mounted on the lower portion of the chamber C.
- a plasma processing apparatus which includes a mounting table 20 and performs plasma processing such as etching processing on the mounted substrate S by plasma P generated in the chamber C.
- the plasma P is so-called inductively coupled plasma
- a coil is used as the element 10
- an electrode disposed in parallel to the mounting table 20 is used as the element 10.
- the mounting table 20 includes a power supply unit 1 ′ for supplying high-frequency power and an impedance matching unit 2 ′ for matching impedance between the power supply unit 1 ′ and the plasma P. 'Is connected.
- the high frequency power supplied from the power supply unit 1 ′ is applied to the mounting table 20 via the impedance matching unit 2 ′.
- the element 10 is connected to a plasma control device 200 ′ including a power supply unit 3 ′ for supplying high frequency power and an impedance matching unit 4 ′ for matching impedance between the power supply unit 3 ′ and the plasma P.
- the high frequency power supplied from the power supply unit 3 ′ is applied to the element 10 via the impedance matching unit 4 ′.
- the element 10 is a coil and inductively coupled plasma is generated in the chamber C
- a magnetic field is generated by the high frequency power applied to the coil 10 by the plasma control device 200 ′, and pressure control is performed in the chamber C by this magnetic field.
- Plasma P is generated by exciting the generated gas.
- the plasma control apparatus 100 ′ due to the high-frequency power applied to the mounting table 20 by the plasma control apparatus 100 ′, a potential difference is generated between the plasma P and the mounting table 20, and ions in the plasma P are actively drawn into the mounting table 20, and etching is performed. Plasma processing such as processing is promoted.
- FIG. 2 is a diagram illustrating a specific configuration example of the plasma control apparatus 100 ′.
- the plasma control apparatus 100 ′ includes a power supply unit 1 ′ and an impedance matching unit 2 ′.
- the power supply unit 1 ′ includes a power supply control unit, a direct current (DC) power supply, a fixed frequency oscillator, a power amplifier, and a directional coupler S1.
- Tr1 and Tr2 are transistors such as FETs or IGBTs.
- T1 is a transformer.
- the impedance matching unit 2 ′ includes a matching unit control unit, an electric motor M, a variable element (such as the variable capacitors VC1 and VC2 illustrated in FIG. 2 and a variable coil (not illustrated)), and a current flowing through the impedance matching unit 2 ′ and an applied voltage.
- a sensor S2 for detecting the ratio of the size and the phase difference is provided.
- the target set power and the traveling wave / reflected wave signal output from the directional coupler S1 are input to the power supply control unit of the power supply unit 1 ′.
- the power supply control unit executes power feedback control for adjusting the output of the DC power supply so that the set power can be obtained.
- the matching unit controller of the impedance matching unit 2 ′ receives the ratio and phase difference between the magnitude of the current flowing through the impedance matching unit 2 ′ detected by the sensor S2 and the applied voltage, and the phase difference unit. Monitor the consistency status with.
- the matching unit controller performs impedance feedback control that changes the constants of the variable elements (variable capacitors VC1, VC2) by mechanical driving of the electric motor M, and the power supply unit 1 ′ and the plasma P The impedance matching is performed.
- FIGS. 3 and 4 are diagrams showing a specific configuration example of the plasma control apparatus 200 ′.
- FIG. 3 shows the case where the element 10 is a coil L1 (when the plasma P is inductively coupled plasma)
- FIG. 4 shows the case where the element 10 is an electrode (when the plasma P is capacitively coupled plasma).
- the plasma control apparatus 200 ′ includes a power supply unit 3 ′ and an impedance matching unit 4 ′ similarly to the plasma control apparatus 100 ′.
- the power supply unit 3 ′ has the same configuration as the power supply unit 1 ′
- the impedance matching unit 4 ′ has the same configuration as the impedance matching unit 2 ′.
- the power supply control unit of the power supply unit 3 ′ has the target set power and the progress output from the directional coupler S1.
- the wave / reflected wave signal is input, and the power supply control unit executes power feedback control for adjusting the output of the DC power supply so that the set power can be obtained.
- the matching unit controller of the impedance matching unit 4 ′ receives the ratio and phase difference between the current flowing through the impedance matching unit 4 ′ detected by the sensor S 2 and the magnitude of the applied voltage, and the matching unit controller. Monitor the consistency status with.
- the matching unit controller performs impedance feedback control for changing the constants of the variable elements (variable capacitors VC1, VC2) by mechanical driving of the electric motor M, and the power supply unit 3 ′ and the plasma P The impedance matching is performed.
- the voltage (peak-to-peak voltage) of the mounting table 20 is indirectly determined by the set power set in the power supply unit 1 ′ (set power input to the power supply control unit of the power supply unit 1 ′) and the state of the plasma P. Is done. For this reason, the state of the plasma P changes with the change in the state of the substrate S subjected to the plasma treatment, and the impedance of the plasma P changes (for example, a plasma equivalent consisting of the capacitance component C2 and the resistance components Rp1, Rp2 shown in FIG.
- the absorbed energy of the plasma P depends on the set power set in the power supply unit 3 ′ (set power input to the power supply control unit of the power supply unit 3 ′) and the state of the plasma P , Determined indirectly. For this reason, the state of the plasma P changes and the impedance of the plasma P changes with the change in the state of the substrate S subjected to the plasma treatment (for example, in the plasma equivalent circuit comprising the inductance component Lp and the resistance component Rp shown in FIG. 3).
- the inductance of the inductance component Lp and the mutual inductance Mp of the plasma P and the coil L1 change in the plasma equivalent circuit composed of the capacitance component C2 and the resistance components Rp1 and Rp2 shown in FIG.
- the impedance matching between the power supply units 1 ′ and 3 ′ and the plasma P is performed at high speed. May not be able to be performed at all, or high-precision and stable plasma processing may not be performed.
- Patent Document 1 Although a device as described in Patent Document 1 is proposed as a plasma control device connected to the mounting table 20 side, the above problem cannot be solved sufficiently.
- the problems of the conventional plasma control apparatus are as follows, in addition to enabling impedance matching between the power supply unit and the plasma at high speed.
- (1) When the plasma to be generated is inductively coupled plasma, the propagation of power necessary for generating and maintaining the plasma is performed by inductive coupling with the plasma by the plasma generating coil. It is proportional to the square of the current flowing through the coil. Therefore, control using the current value is more direct than control using the power value, and stable current control is necessary to maintain more stable plasma generation.
- the processing shape and film formation state of the substrate are controlled by controlling the energy for drawing ions generated by the plasma into the substrate.
- the energy of ions to be drawn can be controlled by a high frequency voltage applied to the mounting table and a direct current (DC) bias of the mounting table generated by the high frequency voltage. Therefore, control using the voltage value is more direct than control using the power value, and stable voltage control is necessary to maintain more stable processing performance and film formation performance.
- the present invention has been made to solve the above-mentioned problems of the prior art, and even when the impedance of the plasma is changed due to the change of the plasma state, the impedance matching between the power supply unit and the plasma is achieved. It is an object of the present invention to provide a plasma control apparatus capable of performing highly accurate and stable plasma processing by realizing stable control of voltage and current important for plasma processing.
- the present invention provides, as a first means, a plasma control device for supplying high-frequency power to a plasma processing apparatus, wherein the plasma processing apparatus is a coil or a capacitor for generating inductively coupled plasma.
- the plasma processing apparatus is a coil or a capacitor for generating inductively coupled plasma.
- a power supply unit for supplying high-frequency power to the mounting table, the power supply unit, a resonance generating unit that is interposed between the mounting table and applies the high-frequency power supplied from the power supply unit to the mounting table;
- a voltmeter for measuring the voltage of the mounting table, wherein the resonance generator detects a phase difference between an LC circuit in which a coil and a capacitor are connected, and a current flowing through the LC circuit and an applied voltage.
- a capacitance of a capacitor of the LC circuit is larger than an assumed capacitance of the plasma, and the power supply unit is configured so that a voltage measured by the voltmeter approaches a target set voltage.
- a plasma control apparatus is provided that controls the magnitude of the high-frequency power to be supplied and controls the frequency of the high-frequency power to be supplied so that the phase difference detected by the sensor is minimized.
- the plasma control apparatus is a plasma control apparatus connected to a mounting table on which a substrate is mounted.
- the resonance generator included in the plasma control apparatus according to the first means is connected to the mounting table and includes an LC circuit.
- the frequency of the high-frequency power supplied by the power supply unit is controlled (adjusted) so that the phase difference between the current flowing through the LC circuit detected by the sensor and the applied voltage is minimized (resonance state).
- the RLC resonance circuit is configured by the LC circuit, the mounting table, and the plasma of the generation unit. For this reason, even if the impedance of the plasma changes, the voltage amplified by the resonance phenomenon is applied to the mounting table.
- the capacitance of the capacitor of the LC circuit is larger than the assumed capacitance of the plasma, even if the impedance of the plasma changes, the influence on the change in the voltage of the mounting table is small. Furthermore, the magnitude of the high-frequency power supplied by the power supply unit is controlled so that the voltage of the mounting table measured by the voltmeter approaches the target set voltage. With the above configuration, even when the plasma impedance changes due to the plasma state change, the voltage of the mounting table is maintained at a value close to the set voltage, so that processing using highly accurate and stable plasma can be performed. It is feasible.
- the impedance matching between the power supply unit and the plasma is performed by configuring the LC circuit of the resonance generation unit, the mounting table, and the RLC resonance circuit using plasma, there is no need for conventional mechanical drive. Impedance matching can be performed at high speed.
- the assumed electrostatic capacitance of the plasma is, for example, in the conventional plasma control apparatus 100 ′ described above with reference to FIG. It can be calculated by checking and calculating the constant of the variable element at the time.
- the electrostatic capacity of the plasma is assumed to be about 100 pF to 110 pF when the frequency of the high frequency power supplied from the power supply unit 1 ′ is 2 MHz, for example, and the frequency of the high frequency power supplied from the power supply unit 1 ′ is It is assumed to be about 400 pF to 1200 pF at 380 kHz.
- the capacitance of the capacitor of the LC circuit is set to be larger than the assumed capacitance of the plasma, but is preferably set to about four times or more of the assumed capacitance of the plasma, for example.
- ions in the generated plasma are contained in the middle.
- An apparatus for performing an etching process or a film forming process on the substrate with the neutral particles obtained by oxidization is also included. The same applies to the plasma processing apparatuses according to second and third means described later.
- the present invention provides, as a second means, a plasma control apparatus for supplying high-frequency power to a plasma processing apparatus, wherein the plasma processing apparatus generates plasma for generating inductively coupled plasma.
- the plasma processing apparatus generates plasma for generating inductively coupled plasma.
- a power supply unit for supplying power; a resonance generating unit that is interposed between the power supply unit and the plasma generating coil and applies high-frequency power supplied from the power supply unit to the plasma generating coil; And an ammeter for measuring the current flowing through the plasma generating coil, and the resonance generator is connected in parallel or in series to the plasma generating coil.
- a sensor for detecting a phase difference between a current flowing through the resonance generating unit and an applied voltage, and the power source unit is configured so that the current measured by the ammeter approaches a target set current.
- a plasma control apparatus is provided that controls the magnitude of the high-frequency power to be supplied and controls the frequency of the high-frequency power to be supplied so that the phase difference detected by the sensor is minimized.
- the plasma control apparatus is a plasma control apparatus connected to a plasma generating coil for generating inductively coupled plasma.
- the resonance generator included in the plasma control apparatus according to the second means includes a capacitor connected to the plasma generating coil and connected in parallel or in series to the plasma generating coil. Since the frequency of the high-frequency power supplied by the power supply unit is controlled (adjusted) so that the phase difference between the current flowing through the resonance generating unit detected by the sensor and the applied voltage is minimized (resonance state), An RLC resonance circuit is configured by the capacitor of the resonance generating unit, the plasma generating coil, and the plasma. For this reason, even if the plasma impedance changes, the current amplified by the resonance phenomenon flows through the plasma generating coil.
- the magnitude of the high frequency power supplied by the power supply unit is controlled so that the current flowing through the plasma generating coil measured by the ammeter approaches the target set current.
- the impedance matching between the power supply unit and the plasma is performed by configuring the capacitor of the resonance generating unit, the coil for generating the plasma, and the RLC resonant circuit using the plasma, the conventional mechanical drive is required. Therefore, impedance matching can be performed at high speed.
- the present invention provides, as a third means, a plasma control apparatus for supplying high-frequency power to a plasma processing apparatus, wherein the plasma processing apparatus is a plasma for generating capacitively coupled plasma.
- the plasma processing apparatus is a plasma for generating capacitively coupled plasma.
- a resonance generating unit that is interposed between the power supply unit and the plasma generation electrode, and applies high-frequency power supplied from the power supply unit to the plasma generation electrode;
- a voltmeter for measuring the voltage of the plasma generating electrode, and the resonance generator includes an LC circuit in which a coil and a capacitor are connected, and a current flowing through the LC circuit and an applied voltage.
- a sensor for detecting a phase difference with the voltage of the LC circuit wherein a capacitance of the capacitor of the LC circuit is larger than an assumed capacitance of the plasma, and the power supply unit has a voltage measured by the voltmeter. Controlling the magnitude of the high-frequency power supplied so as to approach the target set voltage, and controlling the frequency of the high-frequency power supplied so that the phase difference detected by the sensor is minimized.
- a plasma control apparatus is provided.
- the plasma control apparatus is a plasma control apparatus connected to a plasma generation electrode for generating capacitively coupled plasma.
- the resonance generator included in the plasma control apparatus according to the third means is connected to the plasma generating electrode and includes an LC circuit.
- the frequency of the high-frequency power supplied by the power supply unit is controlled (adjusted) so that the phase difference between the current flowing through the LC circuit detected by the sensor and the applied voltage is minimized (resonance state).
- the RLC resonance circuit is configured by the LC circuit of the generation unit, the plasma generation electrode, and the plasma. For this reason, even if the impedance of the plasma changes, the voltage amplified by the resonance phenomenon is applied to the plasma generating electrode.
- the capacitance of the capacitor of the LC circuit is larger than the assumed capacitance of the plasma, even if the impedance of the plasma changes, the influence on the change in the voltage of the plasma generating electrode is small. Further, the magnitude of the high frequency power supplied by the power supply unit is controlled so that the voltage of the plasma generating electrode measured by the voltmeter approaches the target set voltage. With the above configuration, even when the plasma impedance changes due to the plasma state change, the voltage of the plasma generation electrode is maintained at a value close to the set voltage, so that the change in plasma absorption energy is small and high. It is possible to perform processing using accurate and stable plasma.
- the LC circuit of the resonance generator, the plasma generation electrode, and the RLC resonance circuit using plasma are configured, impedance matching between the power supply unit and the plasma is executed, so that conventional mechanical driving is required. Instead, impedance matching can be performed at high speed.
- the assumed electrostatic capacitance of the plasma is, for example, that impedance matching between the power supply unit 3 ′ and the plasma P by the impedance matching unit 4 ′ is completed in the conventional plasma control apparatus 200 ′ described above with reference to FIG. It can be calculated by checking and calculating the constant of the variable element at the time.
- the electrostatic capacity of the plasma is assumed to be about 100 pF to 110 pF when the frequency of the high frequency power supplied from the power supply unit 3 ′ is 2 MHz, for example, and the frequency of the high frequency power supplied from the power supply unit 3 ′ is It is assumed to be about 400 pF to 1200 pF at 380 kHz.
- the capacitance of the capacitor of the LC circuit is set to be larger than the assumed capacitance of the plasma, but is preferably set to about four times or more of the assumed capacitance of the plasma, for example.
- the plasma control apparatus according to the first to third means of the present invention can be applied to the plasma processing apparatus alone, or in the case of a plasma processing apparatus that generates inductively coupled plasma.
- the plasma control apparatus according to the first means and the second means in combination or generates capacitively coupled plasma
- the plasma control apparatus according to the first means and the third means It is also possible to apply in combination.
- the plasma control apparatus of the present invention even when the impedance of the plasma changes due to a change in the state of the plasma, impedance matching between the power supply unit and the plasma can be realized at high speed, and processing using the plasma By realizing stable control of voltage and current that is important for the process, it is possible to execute processing using highly accurate and stable plasma.
- FIG. 5 is a schematic configuration diagram of the plasma control apparatus according to the first embodiment of the present invention.
- the plasma processing apparatus to which the plasma control apparatus 100 according to the first embodiment is applied has the following configuration. That is, the plasma processing apparatus is attached to the chamber C, the upper part of the chamber C, the element 10 for generating the plasma P in the chamber C, the lower part of the chamber C, and the substrate S placed thereon. It is an apparatus that includes a mounting table 20 and performs a process using plasma such as an etching process on the mounted substrate S by the plasma P generated in the chamber C.
- a coil is used as the element 10
- an electrode disposed in parallel to the mounting table 20 is used as the element 10.
- the plasma control apparatus 100 is an apparatus that supplies high-frequency power to the mounting table 20 of the plasma processing apparatus having the above-described configuration. As shown in FIG. 5, the plasma control apparatus 100 is interposed between the power supply unit 1 for supplying high-frequency power to the mounting table 20, and between the power supply unit 1 and the mounting table 20, and is supplied from the power supply unit 1.
- the resonance generator 2 for applying the high frequency power to the mounting table 20 and the voltmeter 5 for measuring the voltage of the mounting table 20 are provided.
- the power supply unit 1 and the resonance generating unit 2 are integrated to form the power supply device 30.
- FIG. 6 is a diagram illustrating a specific configuration example of the plasma control apparatus 100 according to the first embodiment.
- the plasma control apparatus 100 includes a power supply unit 1, a resonance generation unit 2, and a voltmeter (Vpp sensor that measures a peak-to-peak voltage Vpp) 5, and includes the power supply unit 1 and the resonance generation unit. 2 is integrated to constitute the power supply device 30.
- Vpp sensor that measures a peak-to-peak voltage Vpp
- the power supply unit 1 is composed of elements other than those constituting the resonance generating unit 2 among the elements constituting the power supply device 30, and includes a general control unit, a direct current (DC) power source, a frequency variable oscillator (for example, Direct digital synthesizer (DDS)) and power amplifier.
- Tr1 and Tr2 are transistors such as FETs or IGBTs.
- T1 is a transformer.
- the resonance generator 2 includes an LC circuit in which a coil L1 and a capacitor C1 (this embodiment further includes a capacitor C3) are connected (specifically, an LC series circuit in which the coil L1 and the capacitor C1 are connected in series). And a sensor S2 for detecting a phase difference between the current flowing through the LC circuit and the applied voltage.
- the capacitors C1 and C3 are fixed capacitors having a fixed capacitance, and for example, titanium oxide capacitors are used.
- the sensor S2 is attached to the LC circuit and includes a transformer that extracts current and a capacitor that extracts voltage, and has a circuit configuration in which a potential difference is generated according to the phase difference between the extracted current and voltage.
- the capacitance of the capacitor C1 of the LC circuit included in the resonance generating unit 2 is set larger than the assumed capacitance of the plasma P. That is, the capacitance of the capacitor C1 is set larger than the assumed capacitance of the capacitance component C2 in the plasma equivalent circuit composed of the capacitance component C2 and the resistance components Rp1 and Rp2 shown in FIG.
- the resonance generating unit 2 also includes a directional coupler S1, but the traveling wave / reflected wave signal output from the directional coupler S1 is not used for control by the general control unit of the power supply unit 1. It can only be monitored.
- the power supply unit 1 controls the magnitude of the high-frequency power to be supplied so that the voltage measured by the voltmeter 5 approaches the target set voltage. Specifically, a target set voltage (set Vpp) and a voltage (Vpp signal) measured by the voltmeter 5 are input to the general control unit of the power supply unit 1. Voltage feedback control is performed to adjust the output of the DC power supply so as to approach the set voltage. Further, the power supply unit 1 controls the frequency of the high-frequency power to be supplied so that the phase difference detected by the sensor S2 is minimized. Specifically, the phase difference detected by the sensor S2 of the resonance generating unit 2 is input to the total control unit of the power source unit 1, and the total control unit sets the frequency of the oscillator so that the phase difference is minimized. Resonance frequency adjustment control (impedance feedback control) to be controlled is executed.
- the resonance generating unit 2 is connected to the mounting table 20 and includes an LC circuit.
- the frequency of the high-frequency power supplied by the power supply unit 1 is controlled (adjusted) so that the phase difference between the current flowing through the LC circuit detected by the sensor S2 and the applied voltage is minimized (resonance state).
- the LC circuit of the resonance generating unit 2, the mounting table 20, and the plasma P constitute an RLC resonance circuit (specifically, an RLC series resonance circuit). For this reason, even if the impedance of the plasma P changes, the voltage amplified by the resonance phenomenon is applied to the mounting table 20.
- the RLC resonance circuit shown in FIG. 6 includes a coil L1, a capacitor C1, a capacitor C3, a capacitance component C2, and a resistance component Rp2.
- the impedance of this RLC resonance circuit is Z
- the inductance of the coil L1 is L1
- the capacitance of the capacitor C1 is C1
- the capacitance of the capacitor C3 is C3
- the assumed capacitance of the capacitance component C2 is C2
- the resistance of the resistance component Rp2 If the value is Rp2 and the frequency of the high-frequency power is expressed as an angular frequency as ⁇
- Z Rp2 + j [ ⁇ ⁇ L1 ⁇ C3 ⁇ (C1 + C2) / ⁇ ⁇ (C1 + C2 + C3) ⁇ ].
- the impedance of the RLC resonance circuit is equivalent to Rp2.
- the capacitance C1 of the capacitor C1 of the LC circuit is larger than the assumed capacitance of the plasma P (assumed capacitance C2 of the capacitance component C2), even if the impedance of the plasma P changes, the RLC resonance circuit The impedance Z does not change greatly and has little influence on the voltage change of the mounting table 20. Furthermore, the magnitude of the high-frequency power supplied by the power supply unit 1 is controlled so that the voltage of the mounting table 20 measured by the voltmeter 5 approaches the target set voltage.
- the voltage of the mounting table 20 is maintained at a value close to the set voltage, so that a highly accurate and stable plasma is used. Can be executed.
- impedance matching between the power supply unit 1 and the plasma P is executed. Impedance matching can be executed at high speed without requiring driving. Further, when a direct digital synthesizer (DDS) is used as a variable frequency oscillator, the frequency of the oscillator can be controlled at high speed without requiring mechanical drive.
- DDS direct digital synthesizer
- the power supply unit 1 and the resonance generating unit 2 are integrated to form the power supply device 30, by directly connecting the power supply device 30 to the mounting table 20 without using a commercially available coaxial cable or the like,
- the characteristic impedance can be freely set without being restricted by the characteristic impedance (for example, 50 ⁇ ) determined by the standard, and a high voltage can be generated with a small output.
- FIG. 7 is a schematic configuration diagram of a plasma control apparatus according to the second embodiment of the present invention.
- the plasma processing apparatus to which the plasma control apparatus 200 according to the second embodiment is applied has the same configuration as the plasma processing apparatus described in the first embodiment.
- the plasma P is inductively coupled plasma, and a coil is used as the element 10.
- the plasma control apparatus 200 is an apparatus that supplies high-frequency power to the element (plasma generating coil) 10 of the plasma processing apparatus having the above-described configuration.
- the plasma control apparatus 200 includes a power supply unit 3 for supplying high-frequency power to the element 10, and a high-frequency power supplied from the power supply unit 3 between the power supply unit 3 and the element 10.
- a resonance generator 4 that applies power to the element 10 and an ammeter 6 that measures the current flowing through the element 10 are provided.
- the power supply unit 3 and the resonance generating unit 4 are integrated to constitute a power supply device 40.
- FIG. 8 is a diagram illustrating a specific configuration example of the plasma control apparatus 200 according to the second embodiment.
- the plasma control apparatus 200 includes a power supply unit 3, a resonance generation unit 4, and an ammeter 6, and the power supply unit 3 and the resonance generation unit 4 are integrated to form a power supply device 40. is doing.
- the power supply unit 3 includes elements other than those constituting the resonance generating unit 4 among the elements constituting the power supply device 40, and includes a general control unit, a direct current (DC) power source, a variable frequency oscillator (for example, Direct digital synthesizer (DDS)) and power amplifier.
- Tr1 and Tr2 are transistors such as FETs or IGBTs.
- T1 is a transformer.
- the resonance generating unit 4 includes a capacitor C1 connected in parallel to the plasma generating coil L1 as the element 10, and a sensor S2 that detects a phase difference between a current flowing through the resonance generating unit 4 and an applied voltage.
- the capacitor C1 is a fixed capacitor having a fixed capacitance, and for example, a titanium oxide capacitor is used.
- the resonance generator 4 also includes a directional coupler S1, but the traveling wave / reflected wave signal output from the directional coupler S1 is not used for control by the general controller of the power supply unit 3. It can only be monitored.
- the power supply unit 1 controls the magnitude of the high-frequency power supplied so that the current measured by the ammeter 6 approaches the target set current.
- the target setting current and the current measured by the ammeter 6 are input to the general control unit of the power supply unit 3, and the general control unit is configured so that the measured current approaches the set current.
- Execute current feedback control to adjust the output of the power supply.
- the power supply part 3 controls the frequency of the high frequency electric power supplied so that the phase difference detected by sensor S2 may become the minimum.
- the phase difference detected by the sensor S2 of the resonance generating unit 4 is input to the total control unit of the power source unit 3, and the total control unit sets the frequency of the oscillator so that the phase difference is minimized.
- Resonance frequency adjustment control (impedance feedback control) to be controlled is executed.
- the resonance generating unit 4 includes the capacitor C1 connected to the plasma generating coil L1 and connected in parallel to the plasma generating coil L1. .
- the frequency of the high-frequency power supplied from the power supply unit 3 is controlled (adjusted) so that the phase difference between the current flowing through the resonance generating unit 4 detected by the sensor S2 and the applied voltage is minimized (resonance state). Therefore, the capacitor C1, the plasma generating coil L1, and the plasma P of the resonance generating unit 4 constitute an RLC resonance circuit. For this reason, even if the impedance of the plasma P changes, the current amplified by the resonance phenomenon flows through the plasma generating coil L1.
- the magnitude of the high-frequency power supplied by the power supply unit 3 is controlled so that the current flowing through the plasma generating coil L1 measured by the ammeter 6 approaches the target set current.
- the frequency of the oscillator can be controlled at high speed without requiring mechanical drive.
- the power supply unit 3 and the resonance generating unit 4 are integrated to form the power supply device 40, the power supply device 40 is directly connected to the plasma generating coil L1 without using a commercially available coaxial cable or the like. Therefore, the characteristic impedance can be freely set without being restricted by the characteristic impedance (for example, 50 ⁇ ) determined by the standard, and a high current can be generated with a small output.
- FIG. 8 illustrates an example in which the capacitor C1 included in the resonance generating unit 4 is connected in parallel to the plasma generating coil L1, the present invention is not limited to this, and as shown in FIG. The case where the capacitor C1 included in the resonance generating unit 4 is connected in series to the plasma generating coil L1 may be used.
- FIG. 10 is a schematic configuration diagram of a plasma control apparatus according to the third embodiment of the present invention.
- the plasma processing apparatus to which the plasma control apparatus 200A according to the third embodiment is applied has the same configuration as the plasma processing apparatus described in the first and second embodiments.
- the plasma P is capacitively coupled plasma, and an electrode is used as the element 10.
- the plasma control apparatus 200A is an apparatus that supplies high-frequency power to the element (plasma generating electrode) 10 of the plasma processing apparatus having the above-described configuration.
- the plasma control apparatus 200 ⁇ / b> A includes a power supply unit 3 ⁇ / b> A for supplying high frequency power to the element 10, and a high frequency supplied from the power supply unit 3 ⁇ / b> A, interposed between the power supply unit 3 ⁇ / b> A and the element 10.
- a resonance generator 4A that applies power to the element 10 and a voltmeter 7 that measures the voltage of the element 10 are provided.
- the power supply unit 3A and the resonance generating unit 4A are integrated to form a power supply device 40A.
- FIG. 11 is a diagram illustrating a specific configuration example of a plasma control apparatus 200A according to the third embodiment.
- the plasma control apparatus 200A includes a power supply unit 3A, a resonance generation unit 4A, and a voltmeter (Vpp sensor that measures the peak-to-peak voltage Vpp) 7, and includes the power supply unit 3A and the resonance generation unit. 4A is integrated to form a power supply device 40A.
- Vpp sensor that measures the peak-to-peak voltage Vpp
- the power supply unit 3A includes elements other than those constituting the resonance generating unit 4A among the elements constituting the power supply device 40A, and includes a general control unit, a direct current (DC) power source, a frequency variable oscillator (for example, Direct digital synthesizer (DDS)) and power amplifier.
- Tr1 and Tr2 are transistors such as FETs or IGBTs.
- T1 is a transformer.
- the resonance generator 4A includes an LC circuit in which a coil L1 and a capacitor C1 (this embodiment further includes a capacitor C3) are connected (specifically, an LC series circuit in which the coil L1 and the capacitor C1 are connected in series). And a sensor S2 for detecting a phase difference between the current flowing through the LC circuit and the applied voltage.
- the capacitors C1 and C3 are fixed capacitors having a fixed capacitance, and for example, titanium oxide capacitors are used.
- the capacitance of the capacitor C1 of the LC circuit included in the resonance generator 4A is set larger than the assumed capacitance of the plasma P.
- the resonance generating unit 4A also includes a directional coupler S1, but the traveling wave / reflected wave signal output from the directional coupler S1 is not used for control by the general control unit of the power supply unit 3A. It can only be monitored.
- the power supply unit 3A controls the magnitude of the high-frequency power supplied so that the voltage measured by the voltmeter 7 approaches the target set voltage. Specifically, the target set voltage (set Vpp) and the voltage (Vpp signal) measured by the voltmeter 7 are input to the general control unit of the power supply unit 3A. Voltage feedback control is performed to adjust the output of the DC power supply so as to approach the set voltage. Further, the power supply unit 3A controls the frequency of the high-frequency power supplied so that the phase difference detected by the sensor S2 is minimized. Specifically, the phase difference detected by the sensor S2 of the resonance generating unit 4 is input to the overall control unit of the power supply unit 3A, and the overall control unit sets the frequency of the oscillator so that the phase difference is minimized. Resonance frequency adjustment control (impedance feedback control) to be controlled is executed.
- the resonance generating unit 4A is connected to the plasma generating electrode 10 and includes an LC circuit.
- the frequency of the high-frequency power supplied by the power supply unit 3A is controlled (adjusted) so that the phase difference between the current flowing through the LC circuit detected by the sensor S2 and the applied voltage is minimized (resonance state).
- the LC circuit of the resonance generator 4A, the plasma generation electrode 10 and the plasma P constitute an RLC resonance circuit (specifically, an RLC series resonance circuit). For this reason, even if the impedance of the plasma P changes, the voltage amplified by the resonance phenomenon is applied to the plasma generating electrode 10.
- the capacitance of the capacitor C1 of the LC circuit is larger than the assumed capacitance of the plasma P, even if the impedance of the plasma P changes, the influence on the voltage change of the plasma generating electrode 10 is small. Further, the magnitude of the high frequency power supplied by the power supply unit 3A is controlled so that the voltage of the plasma generating electrode 10 measured by the voltmeter 7 approaches the target set voltage. With the above configuration, even when the impedance of the plasma P changes due to a change in the state of the plasma P, the voltage of the plasma generating electrode 10 is maintained at a value close to the set voltage, so that the change in the absorbed energy of the plasma P Therefore, it is possible to carry out highly accurate and stable plasma processing.
- the LC circuit of the resonance generator 4A, the plasma generation electrode 10 and the RLC resonance circuit by the plasma P are configured, impedance matching between the power supply unit 3A and the plasma P is executed. Impedance matching can be performed at high speed without requiring mechanical drive. Further, when a direct digital synthesizer (DDS) is used as a variable frequency oscillator, the frequency of the oscillator can be controlled at high speed without requiring mechanical drive. Further, since the power supply unit 3A and the resonance generating unit 4A are integrated to form the power supply device 40A, the power supply device 40A is directly connected to the plasma generating electrode 10 without using a commercially available coaxial cable or the like. Therefore, the characteristic impedance can be freely set without being restricted by the characteristic impedance (for example, 50 ⁇ ) determined by the standard, and a high voltage can be generated with a small output.
- DDS direct digital synthesizer
- the plasma control device 100 according to the first embodiment, the plasma control device 200 according to the second embodiment, and the plasma control device 200A according to the third embodiment described above can be applied individually to the plasma processing apparatus. It is. In the case of a plasma processing apparatus that generates inductively coupled plasma, the plasma control apparatus 100 according to the first embodiment and the plasma control apparatus 200 according to the second embodiment are applied in combination, or capacitively coupled plasma is generated. In the case of the plasma processing apparatus to be used, the plasma control apparatus 100 according to the first embodiment and the plasma control apparatus 200A according to the third embodiment can be applied in combination.
- the plasma control apparatus 100 (see FIG. 6) according to the first embodiment is connected to the mounting table 20 on which the substrate S is mounted with respect to the plasma processing apparatus that generates inductively coupled plasma, and plasma generation is performed.
- a conventional plasma control apparatus 200 ′ (see FIG. 3) was connected to the coil 10, and a test 1 in which the substrate S was etched was performed.
- a conventional plasma control apparatus 100 ′ (see FIG. 2) is connected to the mounting table 20, and a conventional plasma control apparatus 200 ′ (see FIG. 3) is connected to the plasma generating coil 10. Then, a test 2 for performing an etching process on the substrate S was performed.
- Vpp means the voltage (Vpp signal) of the mounting table 20 measured by a voltmeter.
- Frequency means the frequency of the high-frequency power supplied from the power supply units 1, 1 ′.
- the value described in the “output” column means a power value applied to the mounting table 20.
- E / R means the etching rate of the substrate S.
- the value described in the column of “uniformity” means the in-plane uniformity of the etching rate of the substrate S.
- FIG. 12 is a diagram illustrating an example of the evaluation result of the test.
- 12A shows the evaluation result of Test 2 (conventional)
- FIG. 12B shows the evaluation result of Test 1 (present invention).
- FIG. 12A in the case of Test 2 in which the conventional plasma control apparatus 100 ′ (see FIG. 2) is connected to the mounting table 20, the voltage of the mounting table 20 is changed with the pressure change in the chamber C. A change has occurred.
- FIG. 12B in the case of Test 1 in which the plasma control apparatus 100 (see FIG. 6) according to the first embodiment is connected to the mounting table 20, the pressure change in the chamber C is changed. Even if it occurred, it was found that the voltage of the mounting table 20 was stable.
Abstract
Description
プラズマPがいわゆる誘導結合プラズマである場合、要素10としてはコイルが用いられ、プラズマPがいわゆる容量結合プラズマである場合、要素10としては載置台20に平行に配設された電極が用いられる。
具体的には、載置台20には、高周波電力を供給するための電源部1’と、電源部1’とプラズマPとのインピーダンスの整合を行うインピーダンス整合器2’とを備えるプラズマ制御装置100’が接続される。電源部1’から供給された高周波電力は、インピーダンス整合器2’を介して、載置台20に印加される。
また、要素10には、高周波電力を供給するための電源部3’と、電源部3’とプラズマPとのインピーダンスの整合を行うインピーダンス整合器4’とを備えるプラズマ制御装置200’が接続される。電源部3’から供給された高周波電力は、インピーダンス整合器4’を介して、要素10に印加される。
図2は、プラズマ制御装置100’の具体的構成例を示す図である。なお、図2では、プラズマ処理装置が備える要素10の図示は省略している。
図2に示すように、プラズマ制御装置100’は、電源部1’とインピーダンス整合器2’とを備える。
電源部1’は、電源制御部、直流(DC)電源、周波数固定の発振器、パワーアンプ及び方向性結合器S1を具備する。なお、図2において、Tr1、Tr2は、FET又はIGBT等のトランジスタである。また、T1はトランスである。
インピーダンス整合器2’は、整合器制御部、電動機M、可変素子(図2に示す可変コンデンサVC1、VC2や、図示しない可変コイルなど)及びインピーダンス整合器2’内を流れる電流と印加される電圧の大きさの比率及び位相差を検出するセンサS2を具備する。
また、インピーダンス整合器2’の整合器制御部には、センサS2で検出したインピーダンス整合器2’内を流れる電流と印加される電圧の大きさの比率及び位相差が入力され、整合器制御部で整合状態を監視する。不整合状態であれば、整合器制御部は、電動機Mの機械的駆動によって、可変素子(可変コンデンサVC1、VC2)の定数を変化させるインピーダンス帰還制御を実行し、電源部1’とプラズマPとのインピーダンスの整合を行う。
電源部3’は、電源部1’と同様の構成を有し、インピーダンス整合器4’は、インピーダンス整合器2’と同様の構成を有する。
また、インピーダンス整合器4’の整合器制御部には、センサS2で検出したインピーダンス整合器4’内を流れる電流と印加される電圧の大きさの比率及び位相差が入力され、整合器制御部で整合状態を監視する。不整合状態であれば、整合器制御部は、電動機Mの機械的駆動によって、可変素子(可変コンデンサVC1、VC2)の定数を変化させるインピーダンス帰還制御を実行し、電源部3’とプラズマPとのインピーダンスの整合を行う。
(1)生成するプラズマが誘導結合プラズマである場合、プラズマの生成及び維持に必要な電力の伝播は、プラズマ発生用コイルによるプラズマとの誘導結合により行われるため、プラズマへの吸収電力は、このコイルに流れる電流の二乗に比例する。従って、電流値を用いた制御は電力値を用いた制御より直接的なものとなり、より安定したプラズマ生成を維持するには、安定した電流制御が必要である。
第1の手段に係るプラズマ制御装置が具備する共振発生部は、載置台に接続され、LC回路を具備している。そして、センサで検出したLC回路に流れる電流と印加される電圧との位相差が極小(共振状態)となるように、電源部が供給する高周波電力の周波数が制御(調整)されるため、共振発生部のLC回路、載置台及びプラズマにより、RLC共振回路が構成されることになる。このため、プラズマのインピーダンスが変化したとしても、共振現象によって増幅された電圧が載置台に印加されることになる。また、LC回路のコンデンサの静電容量がプラズマの想定静電容量よりも大きいため、プラズマのインピーダンスが変化したとしても、載置台の電圧の変化に及ぼす影響が少ない。さらに、電圧計によって測定した載置台の電圧が、目標とする設定電圧に近づくように、電源部が供給する高周波電力の大きさが制御される。以上の構成により、プラズマの状態変化によってプラズマのインピーダンスが変化した場合であっても、載置台の電圧は設定電圧に近い値に維持されるため、高精度で且つ安定したプラズマを用いた処理を実行可能である。
また、共振発生部のLC回路、載置台及びプラズマによるRLC共振回路が構成されることにより、電源部とプラズマとのインピーダンスの整合が実行されるため、従来のような機械的駆動を必要とせず、インピーダンスの整合を高速に実行可能である。
具体的には、プラズマの静電容量は、例えば、電源部1’から供給する高周波電力の周波数が2MHzのときに100pF~110pF程度に想定され、電源部1’から供給する高周波電力の周波数が380kHzのときに400pF~1200pF程度に想定される。
前述のように、LC回路のコンデンサの静電容量は、プラズマの想定静電容量よりも大きく設定されるが、例えばプラズマの想定静電容量の4倍以上程度に設定することが好ましい。
第2の手段に係るプラズマ制御装置が具備する共振発生部は、プラズマ発生用コイルに接続され、プラズマ発生用コイルに並列接続又は直列接続されたコンデンサを具備している。そして、センサで検出した共振発生部に流れる電流と印加される電圧との位相差が極小(共振状態)となるように、電源部が供給する高周波電力の周波数が制御(調整)されるため、共振発生部のコンデンサ、プラズマ発生用コイル及びプラズマにより、RLC共振回路が構成されることになる。このため、プラズマのインピーダンスが変化したとしても、共振現象によって増幅された電流がプラズマ発生用コイルに流れることになる。また、電流計によって測定したプラズマ発生用コイルに流れる電流が、目標とする設定電流に近づくように、電源部が供給する高周波電力の大きさが制御される。以上の構成により、プラズマの状態変化によってプラズマのインピーダンスが変化した場合であっても、プラズマ発生用コイルに流れる電流が設定電流に近い値に維持される。プラズマの吸収エネルギーは、プラズマ発生用コイルに流れる電流の二乗に比例することが知られているため、プラズマ発生用コイルに流れる電流が設定電流に近い値に維持されると、プラズマの吸収エネルギーの変化が少なく、高精度で且つ安定したプラズマ処理を実行可能である。
また、共振発生部のコンデンサ、プラズマ発生用コイル及びプラズマによるRLC共振回路が構成されることにより、電源部とプラズマとのインピーダンスの整合が実行されるため、従来のような機械的駆動を必要とせず、インピーダンスの整合を高速に実行可能である。
第3の手段に係るプラズマ制御装置が具備する共振発生部は、プラズマ発生用電極に接続され、LC回路を具備している。そして、センサで検出したLC回路に流れる電流と印加される電圧との位相差が極小(共振状態)となるように、電源部が供給する高周波電力の周波数が制御(調整)されるため、共振発生部のLC回路、プラズマ発生用電極及びプラズマにより、RLC共振回路が構成されることになる。このため、プラズマのインピーダンスが変化したとしても、共振現象によって増幅された電圧がプラズマ発生用電極に印加されることになる。また、LC回路のコンデンサの静電容量がプラズマの想定静電容量よりも大きいため、プラズマのインピーダンスが変化したとしても、プラズマ発生用電極の電圧の変化に及ぼす影響が少ない。さらに、電圧計によって測定したプラズマ発生用電極の電圧が、目標とする設定電圧に近づくように、電源部が供給する高周波電力の大きさが制御される。以上の構成により、プラズマの状態変化によってプラズマのインピーダンスが変化した場合であっても、プラズマ発生用電極の電圧が設定電圧に近い値に維持されるため、プラズマの吸収エネルギーの変化が少なく、高精度で且つ安定したプラズマを用いた処理を実行可能である。
また、共振発生部のLC回路、プラズマ発生用電極及びプラズマによるRLC共振回路が構成されることにより、電源部とプラズマとのインピーダンスの整合が実行されるため、従来のような機械的駆動を必要とせず、インピーダンスの整合を高速に実行可能である。
具体的には、プラズマの静電容量は、例えば、電源部3’から供給する高周波電力の周波数が2MHzのときに100pF~110pF程度に想定され、電源部3’から供給する高周波電力の周波数が380kHzのときに400pF~1200pF程度に想定される。
前述のように、LC回路のコンデンサの静電容量は、プラズマの想定静電容量よりも大きく設定されるが、例えばプラズマの想定静電容量の4倍以上程度に設定することが好ましい。
図5は、本発明の第1実施形態に係るプラズマ制御装置の概略構成図である。
図5に示すように、第1実施形態に係るプラズマ制御装置100が適用されるプラズマ処理装置は、以下の構成を有する。すなわち、プラズマ処理装置は、チャンバCと、チャンバCの上部に取り付けられ、チャンバC内にプラズマPを発生させるための要素10と、チャンバCの下部に取り付けられ、基板Sが載置される載置台20とを備え、チャンバC内に発生したプラズマPによって、載置された基板Sにエッチング処理等のプラズマを用いた処理を施す装置である。プラズマPがいわゆる誘導結合プラズマである場合、要素10としてはコイルが用いられ、プラズマPがいわゆる容量結合プラズマである場合、要素10としては載置台20に平行に配設された電極が用いられる。
図6は、第1実施形態に係るプラズマ制御装置100の具体的構成例を示す図である。なお、図6では、プラズマ処理装置が備える要素10の図示は省略している。
図6に示すように、プラズマ制御装置100は、電源部1と、共振発生部2と、電圧計(ピークツーピーク電圧Vppを測定するVppセンサ)5とを備え、電源部1と共振発生部2とが一体化されて電源装置30を構成している。
なお、共振発生部2は、方向性結合器S1も具備するが、方向性結合器S1から出力される進行波/反射波信号は、電源部1の総合制御部による制御には用いられず、単にモニタ可能とされているだけである。
また、電源部1は、センサS2によって検出した位相差が極小となるように、供給する高周波電力の周波数を制御する。具体的には、電源部1の総合制御部には、共振発生部2のセンサS2によって検出した位相差が入力され、総合制御部は、この位相差が極小となるように、発振器の周波数を制御する共振周波数調整制御(インピーダンス帰還制御)を実行する。
Z=Rp2+j[ω・L1-C3・(C1+C2)/{ω・(C1+C2+C3)}]となる。
共振状態では、インピーダンスZの虚数成分がゼロに近くなるため、RLC共振回路のインピーダンスはRp2と同等になる。
さらに、電圧計5によって測定した載置台20の電圧が、目標とする設定電圧に近づくように、電源部1が供給する高周波電力の大きさが制御される。以上の構成により、プラズマPの状態変化によってプラズマPのインピーダンスが変化した場合であっても、載置台20の電圧は設定電圧に近い値に維持されるため、高精度で且つ安定したプラズマを用いた処理を実行可能である。
図7は、本発明の第2実施形態に係るプラズマ制御装置の概略構成図である。
図7に示すように、第2実施形態に係るプラズマ制御装置200が適用されるプラズマ処理装置は、第1実施形態で説明したプラズマ処理装置と同様の構成を有する。ただし、第2実施形態に係るプラズマ制御装置200が適用されるプラズマ処理装置は、プラズマPが誘導結合プラズマであり、要素10としてコイルが用いられる。
図8は、第2実施形態に係るプラズマ制御装置200の具体的構成例を示す図である。
図8に示すように、プラズマ制御装置200は、電源部3と、共振発生部4と、電流計6とを備え、電源部3と共振発生部4とが一体化されて電源装置40を構成している。
なお、共振発生部4は、方向性結合器S1も具備するが、方向性結合器S1から出力される進行波/反射波信号は、電源部3の総合制御部による制御には用いられず、単にモニタ可能とされているだけである。
また、電源部3は、センサS2によって検出した位相差が極小となるように、供給する高周波電力の周波数を制御する。具体的には、電源部3の総合制御部には、共振発生部4のセンサS2によって検出した位相差が入力され、総合制御部は、この位相差が極小となるように、発振器の周波数を制御する共振周波数調整制御(インピーダンス帰還制御)を実行する。
また、共振発生部4のコンデンサC1、プラズマ発生用コイルL1及びプラズマPによるRLC共振回路が構成されることにより、電源部3とプラズマPとのインピーダンスの整合が実行されるため、従来のような機械的駆動を必要とせず、インピーダンスの整合を高速に実行可能である。また、周波数可変の発振器として、ダイレクトデジタルシンセサイザ(DDS)を用いた場合には、機械的駆動を必要とせずに、高速に発振器の周波数を制御可能である。
さらに、電源部3と共振発生部4とが一体化されて電源装置40を構成しているため、この電源装置40を市販の同軸ケーブル等を介さずにプラズマ発生用コイルL1に直接接続することで、規格で決められた特性インピーダンス(例えば50Ω)に規制されることなく、特性インピーダンスを自由に設定でき、小出力で高電流を発生することが可能である。
図10は、本発明の第3実施形態に係るプラズマ制御装置の概略構成図である。
図10に示すように、第3実施形態に係るプラズマ制御装置200Aが適用されるプラズマ処理装置は、第1及び第2実施形態で説明したプラズマ処理装置と同様の構成を有する。ただし、第3実施形態に係るプラズマ制御装置200Aが適用されるプラズマ処理装置は、プラズマPが容量結合プラズマであり、要素10として電極が用いられる。
図11は、第3実施形態に係るプラズマ制御装置200Aの具体的構成例を示す図である。
図11に示すように、プラズマ制御装置200Aは、電源部3Aと、共振発生部4Aと、電圧計(ピークツーピーク電圧Vppを測定するVppセンサ)7とを備え、電源部3Aと共振発生部4Aとが一体化されて電源装置40Aを構成している。
なお、共振発生部4Aは、方向性結合器S1も具備するが、方向性結合器S1から出力される進行波/反射波信号は、電源部3Aの総合制御部による制御には用いられず、単にモニタ可能とされているだけである。
また、電源部3Aは、センサS2によって検出した位相差が極小となるように、供給する高周波電力の周波数を制御する。具体的には、電源部3Aの総合制御部には、共振発生部4のセンサS2によって検出した位相差が入力され、総合制御部は、この位相差が極小となるように、発振器の周波数を制御する共振周波数調整制御(インピーダンス帰還制御)を実行する。
また、共振発生部4AのLC回路、プラズマ発生用電極10及びプラズマPによるRLC共振回路が構成されることにより、電源部3AとプラズマPとのインピーダンスの整合が実行されるため、従来のような機械的駆動を必要とせず、インピーダンスの整合を高速に実行可能である。また、周波数可変の発振器として、ダイレクトデジタルシンセサイザ(DDS)を用いた場合には、機械的駆動を必要とせずに、高速に発振器の周波数を制御可能である。
さらに、電源部3Aと共振発生部4Aとが一体化されて電源装置40Aを構成しているため、この電源装置40Aを市販の同軸ケーブル等を介さずにプラズマ発生用電極10に直接接続することで、規格で決められた特性インピーダンス(例えば50Ω)に規制されることなく、特性インピーダンスを自由に設定でき、小出力で高電圧を発生することが可能である。
具体的には、誘導結合プラズマを発生させるプラズマ処理装置に対して、基板Sを載置する載置台20に第1実施形態に係るプラズマ制御装置100(図6参照)を接続し、プラズマ発生用コイル10に従来のプラズマ制御装置200’(図3参照)を接続して、基板Sにエッチング処理を施す試験1を行った。一方、同じプラズマ処理装置に対して、載置台20に従来のプラズマ制御装置100’(図2参照)を接続し、プラズマ発生用コイル10に従来のプラズマ制御装置200’(図3参照)を接続して、基板Sにエッチング処理を施す試験2を行った。
(1)プラズマ発生用コイル10への設定電力:40W
(2)チャンバC内への供給ガス:C4F8(流量8sccm)
(3)試験1における設定Vpp:170V
図12(a)に示すように、載置台20に従来のプラズマ制御装置100’(図2参照)を接続した試験2の場合には、チャンバC内の圧力変化に伴い、載置台20の電圧に変化が生じている。これに対し、図12(b)に示すように、載置台20に第1実施形態に係るプラズマ制御装置100(図6参照)を接続した試験1の場合には、チャンバC内の圧力変化が生じたとしても、載置台20の電圧は安定していることがわかった。
2、4、4A・・・共振発生部
5、7・・・電圧計
6・・・電流計
10・・・要素(プラズマ発生用コイル又はプラズマ発生用電極)
20・・・載置台
S・・・基板
C・・・チャンバ
P・・・プラズマ
Claims (3)
- プラズマ処理装置に高周波電力を供給するプラズマ制御装置であって、
前記プラズマ処理装置は、誘導結合プラズマを発生させるためのコイル又は容量結合プラズマを発生させるための電極と、基板が載置され、該載置された基板に前記何れかのプラズマを用いた処理が施される載置台とを備え、
前記プラズマ制御装置は、
前記載置台に高周波電力を供給するための電源部と、
前記電源部と、前記載置台との間に介設され、前記電源部から供給された高周波電力を前記載置台に印加する共振発生部と、
前記載置台の電圧を測定する電圧計とを備え、
前記共振発生部は、
コイルとコンデンサとが接続されたLC回路と、
前記LC回路に流れる電流と印加される電圧との位相差を検出するセンサとを具備し、
前記LC回路のコンデンサの静電容量は、前記プラズマの想定静電容量よりも大きく、
前記電源部は、前記電圧計によって測定した電圧が目標とする設定電圧に近づくように、供給する前記高周波電力の大きさを制御すると共に、前記センサによって検出した位相差が極小となるように、供給する前記高周波電力の周波数を制御することを特徴とするプラズマ制御装置。 - プラズマ処理装置に高周波電力を供給するプラズマ制御装置であって、
前記プラズマ処理装置は、誘導結合プラズマを発生させるためのプラズマ発生用コイルと、基板が載置され、該載置された基板に前記誘導結合プラズマを用いた処理が施される載置台とを備え、
前記プラズマ制御装置は、
前記プラズマ発生用コイルに高周波電力を供給するための電源部と、
前記電源部と、前記プラズマ発生用コイルとの間に介設され、前記電源部から供給された高周波電力を前記プラズマ発生用コイルに印加する共振発生部と、
前記プラズマ発生用コイルに流れる電流を測定する電流計とを備え、
前記共振発生部は、
前記プラズマ発生用コイルに並列接続又は直列接続されたコンデンサと、
前記共振発生部に流れる電流と印加される電圧との位相差を検出するセンサとを具備し、
前記電源部は、前記電流計によって測定した電流が目標とする設定電流に近づくように、供給する前記高周波電力の大きさを制御すると共に、前記センサによって検出した位相差が極小となるように、供給する前記高周波電力の周波数を制御することを特徴とするプラズマ制御装置。 - プラズマ処理装置に高周波電力を供給するプラズマ制御装置であって、
前記プラズマ処理装置は、容量結合プラズマを発生させるためのプラズマ発生用電極と、基板が載置され、該載置された基板に前記容量結合プラズマを用いた処理が施される載置台とを備え、
前記プラズマ制御装置は、
前記プラズマ発生用電極に高周波電力を供給するための電源部と、
前記電源部と、前記プラズマ発生用電極との間に介設され、前記電源部から供給された高周波電力を前記プラズマ発生用電極に印加する共振発生部と、
前記プラズマ発生用電極の電圧を測定する電圧計とを備え、
前記共振発生部は、
コイルとコンデンサとが接続されたLC回路と、
前記LC回路に流れる電流と印加される電圧との位相差を検出するセンサとを具備し、
前記LC回路のコンデンサの静電容量は、前記プラズマの想定静電容量よりも大きく、
前記電源部は、前記電圧計によって測定した電圧が目標とする設定電圧に近づくように、供給する前記高周波電力の大きさを制御すると共に、前記センサによって検出した位相差が極小となるように、供給する前記高周波電力の周波数を制御することを特徴とするプラズマ制御装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020187011782A KR20180116225A (ko) | 2016-01-22 | 2017-01-20 | 플라즈마 제어 장치 |
US15/760,298 US11195697B2 (en) | 2016-01-22 | 2017-01-20 | Plasma control apparatus |
EP17741539.5A EP3337300B1 (en) | 2016-01-22 | 2017-01-20 | Plasma control device |
CN201780003788.3A CN108353493B (zh) | 2016-01-22 | 2017-01-20 | 等离子体控制装置 |
JP2017562924A JP6510679B2 (ja) | 2016-01-22 | 2017-01-20 | プラズマ制御装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2016011012 | 2016-01-22 | ||
JP2016-011012 | 2016-01-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017126662A1 true WO2017126662A1 (ja) | 2017-07-27 |
Family
ID=59361793
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2017/001942 WO2017126662A1 (ja) | 2016-01-22 | 2017-01-20 | プラズマ制御装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US11195697B2 (ja) |
EP (1) | EP3337300B1 (ja) |
JP (2) | JP6510679B2 (ja) |
KR (1) | KR20180116225A (ja) |
CN (1) | CN108353493B (ja) |
TW (1) | TWI713681B (ja) |
WO (1) | WO2017126662A1 (ja) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111868875A (zh) * | 2018-03-14 | 2020-10-30 | 朗姆研究公司 | 用于无匹配式等离子体源的频率调谐 |
KR20210031516A (ko) * | 2018-07-27 | 2021-03-19 | 이글 하버 테크놀로지스, 인코포레이티드 | 나노초 펄서 바이어스 보상 |
US11222767B2 (en) | 2018-07-27 | 2022-01-11 | Eagle Harbor Technologies, Inc. | Nanosecond pulser bias compensation |
US11227745B2 (en) | 2018-08-10 | 2022-01-18 | Eagle Harbor Technologies, Inc. | Plasma sheath control for RF plasma reactors |
US11404246B2 (en) | 2019-11-15 | 2022-08-02 | Eagle Harbor Technologies, Inc. | Nanosecond pulser bias compensation with correction |
US11430635B2 (en) | 2018-07-27 | 2022-08-30 | Eagle Harbor Technologies, Inc. | Precise plasma control system |
US11527383B2 (en) | 2019-12-24 | 2022-12-13 | Eagle Harbor Technologies, Inc. | Nanosecond pulser RF isolation for plasma systems |
US11532457B2 (en) | 2018-07-27 | 2022-12-20 | Eagle Harbor Technologies, Inc. | Precise plasma control system |
US11670484B2 (en) | 2018-11-30 | 2023-06-06 | Eagle Harbor Technologies, Inc. | Variable output impedance RF generator |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10483089B2 (en) | 2014-02-28 | 2019-11-19 | Eagle Harbor Technologies, Inc. | High voltage resistive output stage circuit |
US11302518B2 (en) | 2018-07-27 | 2022-04-12 | Eagle Harbor Technologies, Inc. | Efficient energy recovery in a nanosecond pulser circuit |
KR102257146B1 (ko) * | 2019-12-23 | 2021-05-27 | 인투코어테크놀로지 주식회사 | 플라즈마 발생 장치 및 그 동작 방법 |
KR102142867B1 (ko) * | 2018-12-31 | 2020-08-10 | 인투코어테크놀로지 주식회사 | 대기압 플라즈마 발생 장치 |
US11532455B2 (en) | 2018-12-31 | 2022-12-20 | En2Core Technology, Inc. | Plasma generating apparatus and method for operating same |
KR20240028538A (ko) * | 2019-01-08 | 2024-03-05 | 이글 하버 테크놀로지스, 인코포레이티드 | 나노초 펄서 회로의 효율적 에너지 회수 |
CN112087852A (zh) * | 2019-06-12 | 2020-12-15 | 中国石油化工股份有限公司 | 用于等离子体发生器的控制方法及控制装置 |
KR102413538B1 (ko) * | 2020-05-08 | 2022-06-27 | 인투코어테크놀로지 주식회사 | 정밀하게 주파수를 제어하기 위한 주파수 제어 방법 및 이를 이용하는 주파수 제어 장치 |
TW202220019A (zh) * | 2020-06-26 | 2022-05-16 | 南韓商源多可股份有限公司 | 電漿產生裝置及其控制方法 |
DE102020117402A1 (de) * | 2020-07-01 | 2022-01-05 | Analytik Jena Gmbh | Generator für die Spektrometrie |
KR102479772B1 (ko) * | 2020-08-14 | 2022-12-22 | 인투코어테크놀로지 주식회사 | 대기압 플라즈마 발생 장치 |
KR102381084B1 (ko) * | 2020-08-04 | 2022-04-01 | 인투코어테크놀로지 주식회사 | 대기압 플라즈마 발생 장치 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04237940A (ja) * | 1991-01-18 | 1992-08-26 | Mitsubishi Electric Corp | プラズマ発生装置 |
JP2013105664A (ja) * | 2011-11-15 | 2013-05-30 | Tokyo Electron Ltd | 高周波アンテナ回路及び誘導結合プラズマ処理装置 |
WO2013099133A1 (ja) * | 2011-12-27 | 2013-07-04 | 東京エレクトロン株式会社 | プラズマ処理装置 |
JP2013153432A (ja) * | 2011-12-29 | 2013-08-08 | Mks Instruments Inc | Rf電源の周波数チューニングに関する電力歪みに基づくサーボ制御システム |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04212414A (ja) * | 1990-08-16 | 1992-08-04 | Fuji Electric Co Ltd | プラズマ処理装置 |
US5576629A (en) * | 1994-10-24 | 1996-11-19 | Fourth State Technology, Inc. | Plasma monitoring and control method and system |
JPH0982495A (ja) * | 1995-09-18 | 1997-03-28 | Toshiba Corp | プラズマ生成装置およびプラズマ生成方法 |
US6252354B1 (en) * | 1996-11-04 | 2001-06-26 | Applied Materials, Inc. | RF tuning method for an RF plasma reactor using frequency servoing and power, voltage, current or DI/DT control |
KR100525961B1 (ko) | 1996-11-04 | 2005-12-21 | 어플라이드 머티어리얼스, 인코포레이티드 | 플라즈마시스에서발생하는고주파를필터링하는플라즈마처리장치및방법 |
US6195342B1 (en) | 1997-11-25 | 2001-02-27 | Motorola, Inc. | Method for determining hand-off candidates in a neighbor set in a CDMA communication system |
TW483037B (en) | 2000-03-24 | 2002-04-11 | Hitachi Ltd | Semiconductor manufacturing apparatus and method of processing semiconductor wafer using plasma, and wafer voltage probe |
JP3659180B2 (ja) | 2000-03-24 | 2005-06-15 | 株式会社日立製作所 | 半導体製造装置および処理方法、およびウエハ電位プローブ |
US6305316B1 (en) * | 2000-07-20 | 2001-10-23 | Axcelis Technologies, Inc. | Integrated power oscillator RF source of plasma immersion ion implantation system |
JP4042363B2 (ja) * | 2001-07-23 | 2008-02-06 | 株式会社日立国際電気 | プラズマ生成用の螺旋共振装置 |
JP4178775B2 (ja) | 2001-08-31 | 2008-11-12 | 株式会社日立国際電気 | プラズマリアクター |
JP2003179045A (ja) * | 2001-12-13 | 2003-06-27 | Tokyo Electron Ltd | プラズマ処理装置及びその制御方法 |
JP2005116818A (ja) * | 2003-10-08 | 2005-04-28 | Nec Yamagata Ltd | プラズマ発生装置 |
JP2005252057A (ja) | 2004-03-05 | 2005-09-15 | Sumitomo Precision Prod Co Ltd | エッチング装置 |
US20080179948A1 (en) * | 2005-10-31 | 2008-07-31 | Mks Instruments, Inc. | Radio frequency power delivery system |
US8241457B2 (en) * | 2007-03-30 | 2012-08-14 | Tokyo Electron Limited | Plasma processing system, plasma measurement system, plasma measurement method, and plasma control system |
JP2008277275A (ja) * | 2007-03-30 | 2008-11-13 | Tokyo Electron Ltd | プラズマ処理装置、計測装置、計測方法および制御装置 |
WO2010018786A1 (ja) | 2008-08-11 | 2010-02-18 | 住友精密工業株式会社 | プラズマ制御装置 |
US8501631B2 (en) * | 2009-11-19 | 2013-08-06 | Lam Research Corporation | Plasma processing system control based on RF voltage |
JP5562065B2 (ja) * | 2010-02-25 | 2014-07-30 | Sppテクノロジーズ株式会社 | プラズマ処理装置 |
US9528814B2 (en) * | 2011-05-19 | 2016-12-27 | NeoVision, LLC | Apparatus and method of using impedance resonance sensor for thickness measurement |
CN202905659U (zh) * | 2012-10-12 | 2013-04-24 | 北京北方微电子基地设备工艺研究中心有限责任公司 | 一种匹配器及等离子体加工设备 |
JP6078419B2 (ja) * | 2013-02-12 | 2017-02-08 | 株式会社日立ハイテクノロジーズ | プラズマ処理装置の制御方法、プラズマ処理方法及びプラズマ処理装置 |
-
2017
- 2017-01-20 WO PCT/JP2017/001942 patent/WO2017126662A1/ja active Application Filing
- 2017-01-20 US US15/760,298 patent/US11195697B2/en active Active
- 2017-01-20 JP JP2017562924A patent/JP6510679B2/ja active Active
- 2017-01-20 EP EP17741539.5A patent/EP3337300B1/en active Active
- 2017-01-20 CN CN201780003788.3A patent/CN108353493B/zh active Active
- 2017-01-20 KR KR1020187011782A patent/KR20180116225A/ko not_active Application Discontinuation
- 2017-01-23 TW TW106102420A patent/TWI713681B/zh active
-
2019
- 2019-04-03 JP JP2019071407A patent/JP2019145513A/ja active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04237940A (ja) * | 1991-01-18 | 1992-08-26 | Mitsubishi Electric Corp | プラズマ発生装置 |
JP2013105664A (ja) * | 2011-11-15 | 2013-05-30 | Tokyo Electron Ltd | 高周波アンテナ回路及び誘導結合プラズマ処理装置 |
WO2013099133A1 (ja) * | 2011-12-27 | 2013-07-04 | 東京エレクトロン株式会社 | プラズマ処理装置 |
JP2013153432A (ja) * | 2011-12-29 | 2013-08-08 | Mks Instruments Inc | Rf電源の周波数チューニングに関する電力歪みに基づくサーボ制御システム |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111868875A (zh) * | 2018-03-14 | 2020-10-30 | 朗姆研究公司 | 用于无匹配式等离子体源的频率调谐 |
CN111868875B (zh) * | 2018-03-14 | 2024-01-12 | 朗姆研究公司 | 用于无匹配式等离子体源的频率调谐 |
JP7038897B2 (ja) | 2018-07-27 | 2022-03-18 | イーグル ハーバー テクノロジーズ,インク. | ナノ秒パルサーのバイアス補償 |
JP7324326B2 (ja) | 2018-07-27 | 2023-08-09 | イーグル ハーバー テクノロジーズ,インク. | ナノ秒パルサーのバイアス補償 |
JP2021524658A (ja) * | 2018-07-27 | 2021-09-13 | イーグル ハーバー テクノロジーズ, インク.Eagle Harbor Technologies, Inc. | ナノ秒パルサーパルス発生 |
JP2021524659A (ja) * | 2018-07-27 | 2021-09-13 | イーグル ハーバー テクノロジーズ, インク.Eagle Harbor Technologies, Inc. | 空間変動型ウェハバイアス電力システム |
US11222767B2 (en) | 2018-07-27 | 2022-01-11 | Eagle Harbor Technologies, Inc. | Nanosecond pulser bias compensation |
JP2021524660A (ja) * | 2018-07-27 | 2021-09-13 | イーグル ハーバー テクノロジーズ, インク.Eagle Harbor Technologies, Inc. | ナノ秒パルサーのバイアス補償 |
KR20210038943A (ko) * | 2018-07-27 | 2021-04-08 | 이글 하버 테크놀로지스, 인코포레이티드 | 공간 가변 웨이퍼 바이어스 전력 시스템 |
KR20210031516A (ko) * | 2018-07-27 | 2021-03-19 | 이글 하버 테크놀로지스, 인코포레이티드 | 나노초 펄서 바이어스 보상 |
US11430635B2 (en) | 2018-07-27 | 2022-08-30 | Eagle Harbor Technologies, Inc. | Precise plasma control system |
KR102575498B1 (ko) * | 2018-07-27 | 2023-09-08 | 이글 하버 테크놀로지스, 인코포레이티드 | 공간 가변 웨이퍼 바이어스 전력 시스템 |
US11532457B2 (en) | 2018-07-27 | 2022-12-20 | Eagle Harbor Technologies, Inc. | Precise plasma control system |
US11587768B2 (en) | 2018-07-27 | 2023-02-21 | Eagle Harbor Technologies, Inc. | Nanosecond pulser thermal management |
KR102572562B1 (ko) | 2018-07-27 | 2023-08-31 | 이글 하버 테크놀로지스, 인코포레이티드 | 나노초 펄서 바이어스 보상 |
US11227745B2 (en) | 2018-08-10 | 2022-01-18 | Eagle Harbor Technologies, Inc. | Plasma sheath control for RF plasma reactors |
US11670484B2 (en) | 2018-11-30 | 2023-06-06 | Eagle Harbor Technologies, Inc. | Variable output impedance RF generator |
US11404246B2 (en) | 2019-11-15 | 2022-08-02 | Eagle Harbor Technologies, Inc. | Nanosecond pulser bias compensation with correction |
US11527383B2 (en) | 2019-12-24 | 2022-12-13 | Eagle Harbor Technologies, Inc. | Nanosecond pulser RF isolation for plasma systems |
Also Published As
Publication number | Publication date |
---|---|
JP2019145513A (ja) | 2019-08-29 |
JP6510679B2 (ja) | 2019-05-08 |
EP3337300A1 (en) | 2018-06-20 |
CN108353493B (zh) | 2020-05-19 |
EP3337300A4 (en) | 2018-12-05 |
TW201732857A (zh) | 2017-09-16 |
JPWO2017126662A1 (ja) | 2018-08-02 |
CN108353493A (zh) | 2018-07-31 |
TWI713681B (zh) | 2020-12-21 |
US11195697B2 (en) | 2021-12-07 |
US20180315581A1 (en) | 2018-11-01 |
KR20180116225A (ko) | 2018-10-24 |
EP3337300B1 (en) | 2020-11-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2017126662A1 (ja) | プラズマ制御装置 | |
JP6483880B2 (ja) | ウェハバイアスを決定するための方法およびプラズマシステム | |
US9508529B2 (en) | System, method and apparatus for RF power compensation in a plasma processing system | |
US9842725B2 (en) | Using modeling to determine ion energy associated with a plasma system | |
US6174450B1 (en) | Methods and apparatus for controlling ion energy and plasma density in a plasma processing system | |
JP4755566B2 (ja) | 高周波プラズマ供給装置の出力エネルギーを開ループ制御するおよび/または閉ループ制御する方法およびプラズマエネルギーをプラズマ負荷に供給するための高周波プラズマ供給装置 | |
US20190108976A1 (en) | Matched source impedance driving system and method of operating the same | |
US9704692B2 (en) | System for instantaneous radiofrequency power measurement and associated methods | |
JP5679967B2 (ja) | 複合波形周波数マッチング装置 | |
JP2004535039A5 (ja) | ||
KR20160046748A (ko) | Rf 송신 경로의 선택된 부분들에 대한 rf 송신 모델들의 정확도를 개선하기 위한 시스템, 방법 및 장치 | |
JP2014195044A5 (ja) | ||
CN101552187A (zh) | 等离子体处理装置和等离子体处理方法 | |
TW201505366A (zh) | 射頻電源系統和利用射頻電源系統進行阻抗匹配的方法 | |
JP2011187503A (ja) | 自動整合方法、コンピュータ読み取り可能な記憶媒体、自動整合装置及びプラズマ処理装置 | |
KR100838750B1 (ko) | 플라즈마처리장치 및 플라즈마처리방법 | |
US6879870B2 (en) | Method and apparatus for routing harmonics in a plasma to ground within a plasma enhanced semiconductor wafer processing chamber | |
Di et al. | Parallel resonant frequency tracking based on the static capacitance online measuring for a piezoelectric transducer | |
JP2014207221A (ja) | 電力供給装置、電力供給方法、及びそれを利用する基板処理装置 | |
US20040066204A1 (en) | Wafer resistance measurement apparatus and method using capacitively coupled AC excitation signal | |
JP4298611B2 (ja) | プラズマ処理装置 | |
JP6510922B2 (ja) | プラズマ処理装置及びプラズマ処理方法 | |
JP2005071872A (ja) | 高周波電源装置および高周波電力供給方法 | |
Chang et al. | Experimental Characterization of Instabilities in Inductively Coupled Argon Plasma | |
JP2006288009A5 (ja) |
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: 17741539 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2017562924 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 15760298 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 20187011782 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |