WO2024057973A1 - 静電チャック及び基板処理装置 - Google Patents
静電チャック及び基板処理装置 Download PDFInfo
- Publication number
- WO2024057973A1 WO2024057973A1 PCT/JP2023/032079 JP2023032079W WO2024057973A1 WO 2024057973 A1 WO2024057973 A1 WO 2024057973A1 JP 2023032079 W JP2023032079 W JP 2023032079W WO 2024057973 A1 WO2024057973 A1 WO 2024057973A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- electrostatic chuck
- contact support
- substrate
- chuck according
- electrode
- 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
-
- 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
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/683—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping
- H01L21/6831—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere for supporting or gripping using electrostatic chucks
- H01L21/6833—Details of electrostatic chucks
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/44—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating
- C23C16/458—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the method of coating characterised by the method used for supporting substrates in the reaction chamber
-
- H10P50/242—
-
- H10P72/0434—
-
- H10P72/70—
-
- H10P72/72—
-
- H10P72/722—
Definitions
- the present disclosure relates to an electrostatic chuck and a substrate processing apparatus.
- Patent Document 1 discloses a holding device that includes a ceramic member in which a concave portion and a plurality of convex portions (outer seal band and columnar convex portions) are formed on the suction surface.
- Patent Document 2 discloses that a residual charge accumulates on the surface of an electrostatic chuck, and a substrate is residually attracted.
- the present disclosure provides an electrostatic chuck and a substrate processing apparatus that suppress residual adsorption of a substrate.
- the dielectric includes a dielectric and an electrode provided inside the dielectric, and the dielectric has a first main surface and a first main surface. a contact support portion that protrudes from the substrate and supports the substrate by contacting the back surface of the substrate; and a groove portion provided between the first main surface and the contact support portion so as to surround the contact support portion. , an electrostatic chuck is provided.
- an electrostatic chuck and a substrate processing apparatus that suppress residual adsorption of a substrate.
- An example of a diagram for explaining a configuration example of a capacitively coupled plasma processing apparatus An example of a plan view of an electrostatic chuck according to an embodiment. An example of an AA cross-sectional view of an electrostatic chuck according to an embodiment. An example of a plan view of an electrostatic chuck according to a reference example. An example of a BB sectional view of an electrostatic chuck according to a reference example. An example of a partially enlarged sectional view showing a substrate holding state in an electrostatic chuck according to an embodiment. An example of a partially enlarged sectional view showing a substrate holding state in an electrostatic chuck according to a reference example. Another example of a partially enlarged sectional view showing a substrate holding state in the electrostatic chuck according to one embodiment.
- FIG. 1 is an example of a diagram for explaining a configuration example of a capacitively coupled plasma processing apparatus (substrate processing apparatus) 1. As shown in FIG.
- the plasma processing system includes a capacitively coupled plasma processing apparatus 1 and a control section 2.
- the capacitively coupled plasma processing apparatus 1 includes a plasma processing chamber 10, a gas supply section 20, a power supply 30, and an exhaust system 40. Further, the plasma processing apparatus 1 includes a substrate support section 11 and a gas introduction section.
- the gas inlet is configured to introduce at least one processing gas into the plasma processing chamber 10 .
- the gas introduction section includes a shower head 13.
- Substrate support 11 is arranged within plasma processing chamber 10 .
- the shower head 13 is arranged above the substrate support section 11 . In one embodiment, showerhead 13 forms at least a portion of the ceiling of plasma processing chamber 10 .
- the plasma processing chamber 10 has a plasma processing space 10s defined by a shower head 13, a side wall 10a of the plasma processing chamber 10, and a substrate support 11.
- the plasma processing chamber 10 has at least one gas supply port for supplying at least one processing gas to the plasma processing space 10s, and at least one gas exhaust port for discharging gas from the plasma processing space.
- Plasma processing chamber 10 is grounded.
- the shower head 13 and the substrate support section 11 are electrically insulated from the casing of the plasma processing chamber 10.
- the substrate support section 11 includes a main body section 111 and a ring assembly 112.
- the main body portion 111 has a central region 111a for supporting the substrate W and an annular region 111b for supporting the ring assembly 112.
- a wafer is an example of a substrate W.
- the annular region 111b of the main body 111 surrounds the central region 111a of the main body 111 in plan view.
- the substrate W is placed on the central region 111a of the main body 111, and the ring assembly 112 is placed on the annular region 111b of the main body 111 so as to surround the substrate W on the central region 111a of the main body 111. Therefore, the central region 111a is also called a substrate support surface for supporting the substrate W, and the annular region 111b is also called a ring support surface for supporting the ring assembly 112.
- the main body 111 includes a base 1110 and an electrostatic chuck 1111.
- Base 1110 includes a conductive member.
- the conductive member of the base 1110 can function as a lower electrode.
- Electrostatic chuck 1111 is placed on base 1110.
- Electrostatic chuck 1111 includes a ceramic member 1111a and an electrostatic electrode 1111b disposed within ceramic member 1111a.
- Ceramic member 1111a has a central region 111a. In one embodiment, ceramic member 1111a also has an annular region 111b. Note that another member surrounding the electrostatic chuck 1111, such as an annular electrostatic chuck or an annular insulating member, may have the annular region 111b.
- ring assembly 112 may be placed on the annular electrostatic chuck or the annular insulation member, or may be placed on both the electrostatic chuck 1111 and the annular insulation member.
- at least one RF/DC electrode coupled to an RF (Radio Frequency) power source 31 and/or a DC (Direct Current) power source 32, which will be described later, may be disposed within the ceramic member 1111a.
- at least one RF/DC electrode functions as a bottom electrode.
- An RF/DC electrode is also referred to as a bias electrode if a bias RF signal and/or a DC signal, as described below, is supplied to at least one RF/DC electrode.
- the conductive member of the base 1110 and at least one RF/DC electrode may function as a plurality of lower electrodes.
- the electrostatic electrode 1111b may function as a lower electrode. Therefore, the substrate support 11 includes at least one lower electrode.
- Ring assembly 112 includes one or more annular members.
- the one or more annular members include one or more edge rings and at least one cover ring.
- the edge ring is made of a conductive or insulating material
- the cover ring is made of an insulating material.
- the substrate support unit 11 may include a temperature control module configured to adjust at least one of the electrostatic chuck 1111, the ring assembly 112, and the substrate to a target temperature.
- the temperature control module may include a heater, a heat transfer medium, a flow path 1110a, or a combination thereof.
- a heat transfer fluid such as brine or gas flows through the flow path 1110a.
- a channel 1110a is formed within the base 1110 and one or more heaters are disposed within the ceramic member 1111a of the electrostatic chuck 1111.
- the substrate support section 11 may include a heat transfer gas supply section 15 configured to supply heat transfer gas to the gap between the back surface of the substrate W and the central region 111a.
- the heat transfer gas supply unit 15 is provided between the back surface of the substrate W placed on the electrostatic chuck 1111 and the first main surface (the dug surface 121 described later) of the electrostatic chuck 1111 via the flow path 14. , for example, supplying a heat transfer gas such as He gas.
- the shower head 13 is configured to introduce at least one processing gas from the gas supply section 20 into the plasma processing space 10s.
- the shower head 13 has at least one gas supply port 13a, at least one gas diffusion chamber 13b, and a plurality of gas introduction ports 13c.
- the processing gas supplied to the gas supply port 13a passes through the gas diffusion chamber 13b and is introduced into the plasma processing space 10s from the plurality of gas introduction ports 13c.
- the showerhead 13 also includes at least one upper electrode.
- the gas introduction section may include one or more side gas injectors (SGI) attached to one or more openings formed in the side wall 10a.
- SGI side gas injectors
- the gas supply section 20 may include at least one gas source 21 and at least one flow rate controller 22.
- the gas supply 20 is configured to supply at least one process gas from a respective gas source 21 to the showerhead 13 via a respective flow controller 22 .
- Each flow controller 22 may include, for example, a mass flow controller or a pressure-controlled flow controller.
- gas supply 20 may include one or more flow modulation devices that modulate or pulse the flow rate of at least one process gas.
- the power supply 30 includes an RF power supply 31 coupled to the plasma processing chamber 10 via at least one impedance matching circuit.
- the RF power supply 31 is configured to supply at least one RF signal (RF power) to at least one lower electrode and/or at least one upper electrode. This causes a plasma to be formed from at least one processing gas supplied to the plasma processing space 10s.
- the RF power supply 31 can function as at least a part of a plasma generating unit configured to generate a plasma from one or more processing gases in the plasma processing chamber 10.
- a bias RF signal to the at least one lower electrode, a bias potential is generated on the substrate W, and ion components in the formed plasma can be attracted to the substrate W.
- the RF power supply 31 includes a first RF generation section 31a and a second RF generation section 31b.
- the first RF generation section 31a is coupled to at least one lower electrode and/or at least one upper electrode via at least one impedance matching circuit, and generates a source RF signal (source RF power) for plasma generation. It is configured as follows.
- the source RF signal has a frequency within the range of 10 MHz to 150 MHz.
- the first RF generator 31a may be configured to generate multiple source RF signals having different frequencies. The generated one or more source RF signals are provided to at least one bottom electrode and/or at least one top electrode.
- the second RF generating section 31b is coupled to at least one lower electrode via at least one impedance matching circuit, and is configured to generate a bias RF signal (bias RF power).
- the frequency of the bias RF signal may be the same or different than the frequency of the source RF signal.
- the bias RF signal has a lower frequency than the frequency of the source RF signal.
- the bias RF signal has a frequency within the range of 100kHz to 60MHz.
- the second RF generator 31b may be configured to generate multiple bias RF signals having different frequencies.
- the generated one or more bias RF signals are provided to at least one bottom electrode. Also, in various embodiments, at least one of the source RF signal and the bias RF signal may be pulsed.
- Power source 30 may also include a DC power source 32 coupled to plasma processing chamber 10 .
- the DC power supply 32 includes a first DC generation section 32a and a second DC generation section 32b.
- the first DC generator 32a is connected to at least one lower electrode and configured to generate a first DC signal.
- the generated first bias DC signal is applied to the at least one bottom electrode.
- the second DC generator 32b is connected to the at least one upper electrode and configured to generate a second DC signal.
- the generated second DC signal is applied to the at least one top electrode.
- At least one of the first and second DC signals may be pulsed.
- a sequence of voltage pulses is applied to at least one lower electrode and/or at least one upper electrode.
- the voltage pulse may have a pulse waveform that is rectangular, trapezoidal, triangular, or a combination thereof.
- a waveform generator for generating a sequence of voltage pulses from a DC signal is connected between the first DC generator 32a and the at least one bottom electrode. Therefore, the first DC generation section 32a and the waveform generation section constitute a voltage pulse generation section.
- the voltage pulse generation section is connected to at least one upper electrode.
- the voltage pulse may have positive polarity or negative polarity.
- the sequence of voltage pulses may include one or more positive voltage pulses and one or more negative voltage pulses within one period.
- the first and second DC generation units 32a and 32b may be provided in addition to the RF power source 31, or the first DC generation unit 32a may be provided in place of the second RF generation unit 31b. good.
- the exhaust system 40 may be connected to a gas exhaust port 10e provided at the bottom of the plasma processing chamber 10, for example.
- Evacuation system 40 may include a pressure regulating valve and a vacuum pump. The pressure within the plasma processing space 10s is adjusted by the pressure regulating valve.
- the vacuum pump may include a turbomolecular pump, a dry pump, or a combination thereof.
- the control unit 2 processes computer-executable instructions that cause the plasma processing apparatus 1 to perform various steps described in this disclosure.
- the control unit 2 may be configured to control each element of the plasma processing apparatus 1 to perform the various steps described herein. In one embodiment, part or all of the control unit 2 may be included in the plasma processing apparatus 1.
- the control unit 2 may include a processing unit 2a1, a storage unit 2a2, and a communication interface 2a3.
- the control unit 2 is realized by, for example, a computer 2a.
- the processing unit two a1 may be configured to read a program from the storage unit two a2 and perform various control operations by executing the read program. This program may be stored in the storage unit 2a2 in advance, or may be acquired via a medium when necessary.
- the acquired program is stored in the storage unit 2a2, and is read out from the storage unit 2a2 and executed by the processing unit 2a1.
- the medium may be various storage media readable by the computer 2a, or may be a communication line connected to the communication interface 2a3.
- the processing unit 2a1 may be a CPU (Central Processing Unit).
- the storage unit 2a2 may include a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), an SSD (Solid State Drive), or a combination thereof. Good.
- the communication interface 2a3 may communicate with the plasma processing apparatus 1 via a communication line such as a LAN (Local Area Network).
- FIG. 2 is an example of a plan view of the electrostatic chuck 1111 according to one embodiment.
- FIG. 3 is an example of an AA cross-sectional view of the electrostatic chuck 1111 according to one embodiment.
- the electrostatic chuck 1111 includes a ceramic member 1111a and an electrostatic electrode 1111b.
- the ceramic member 1111a is made of dielectric material.
- Electrostatic electrode 1111b is disposed within ceramic member 1111a.
- the central region 111a of the electrostatic chuck 1111 has a carved surface (first main surface) 121, dots 122, and a seal band 123.
- the dug surface 121 is a surface dug deeper than the upper surface of the dots 122 (the surface on which the substrate W is placed) and the upper surface of the seal band 123 (the surface on which the substrate W is placed). Further, the dug surface 121 is a surface that faces the back surface of the substrate W while being spaced apart from it when the substrate W is placed on the electrostatic chuck 1111 (see FIG. 6, which will be described later).
- the surface of the dug surface 121 is a processed surface that has been subjected to blasting and polishing.
- the surface of the dug surface 121 is, for example, a processed surface with an arithmetic mean roughness Ra of 0.1 ( ⁇ m).
- the electrostatic chuck 1111 has a flow path 141 and an opening 142.
- the flow path 141 is formed to penetrate the electrostatic chuck 1111, and heat transfer gas is supplied from the heat transfer gas supply section 15 (see FIG. 1) via the flow path 14 (see FIG. 1).
- the opening 142 is formed in the digging surface 121.
- dots 122 and a seal band 123 are formed as a contact support portion that protrudes beyond the digging surface 121.
- the dots 122 protrude from the digging surface 121 and are formed in a substantially cylindrical shape.
- a plurality of dots 122 are formed in a region inside an annular seal band 123 formed at the periphery of the central region 111a when the electrostatic chuck 1111 is viewed from above (see FIG. 2).
- the upper surface of the dot 122 comes into contact with the back surface of the substrate W, and supports the inner region of the substrate W.
- the upper surface of the dot 122 is a polished surface.
- the upper surface of the dots 122 is, for example, a processed surface with an arithmetic mean roughness Ra of 0.01 ( ⁇ m).
- the seal band 123 protrudes from the dug surface 121 and is formed in an annular shape along the outer periphery of the central region 111a.
- the upper surface of the seal band 123 comes into contact with the back surface of the substrate W, and supports the outer region of the substrate W.
- the upper surface of the seal band 123 is a polished surface.
- the upper surface of the seal band 123 is, for example, a processed surface with an arithmetic mean roughness Ra of 0.01 ( ⁇ m).
- the seal band 123 is formed by the back surface of the substrate W, the dug surface 121 of the electrostatic chuck 1111, and the inner peripheral surface of the seal band 123. , forming a space (gap).
- the heat transfer gas supplied from the heat transfer gas supply unit 15 is supplied to this space from an opening 142 formed in the digging surface 121 via the flow path 14 and the flow path 141.
- Grooves 124 and 125 dug from the digging surface 121 are formed in the central region 111a of the electrostatic chuck 1111.
- the groove portion 124 is formed to surround the dots 122. In other words, the groove portion 124 is formed between the upper surface of the dot 122 and the digging surface 121. Further, the groove portion 124 is formed directly above the electrostatic electrode 1111b.
- the groove portion 125 is formed to surround the inner peripheral side of the seal band 123.
- the groove portion 124 is formed between the upper surface of the dot 122 and the digging surface 121. Further, the groove portion 125 is formed directly above the electrostatic electrode 1111b.
- the electrostatic chuck 1111 has a plurality of contact support portions (dots 122, seal band 123), and groove portions 124 and 125 correspond to each of the plurality of contact support portions (dots 122, seal band 123). It is provided. Further, the plurality of groove portions 124 and 125 are continuously provided so as to surround the contact support portion. However, the grooves 124 and 125 may be provided discretely. In other words, one contact support portion 122, 123 may be surrounded by a plurality of groove portions 124, 125.
- the bottom surfaces of the grooves 124 and 125 are formed at positions closer to the electrostatic electrode 1111b than the dug surface 121. Furthermore, the bottom surfaces of the grooves 124 and 125 are formed at positions closer to the electrostatic electrode 1111b than the contact surface on which the substrate W is placed (the upper surface of the dots 122, the upper surface of the seal band 123). Further, the dug surface 121 is formed at a position closer to the electrostatic electrode 1111b than the contact surface on which the substrate W is placed (the upper surface of the dots 122, the upper surface of the seal band 123).
- the width of the groove portions 124 and 125 is preferably, for example, 5 ⁇ m or more and 150 ⁇ m or less. By setting the width of the grooves 124 and 125 to 150 ⁇ m or less, it is possible to secure a large area of the dug surface 121 that contributes to the attraction force when the substrate W is electrostatically attracted. Furthermore, by setting the width of the grooves 124, 125 to 5 ⁇ m or more, the grooves 124, 125 can be easily formed. Note that the grooves 124 and 125 are formed, for example, by groove cutting using a laser.
- the area of the grooves 124 and 125 is preferably 10% or less of the area of the digging surface 121.
- the width of the groove portion 125 is preferably wider than the width of the groove portion 124. Specifically, the width of the groove 125 is preferably at least 1.5 times wider than the width of the groove 124.
- the depth of the grooves 124 and 125 is preferably at least twice the roughness of the dug surface 121. Further, the depth of the grooves 124 and 125 is preferably 10 ⁇ m or more and 100 ⁇ m or less, for example.
- FIG. 4 is an example of a plan view of an electrostatic chuck 1111C according to a reference example.
- FIG. 5 is an example of a BB cross-sectional view of an electrostatic chuck 1111C according to a reference example.
- the central region 111a of the electrostatic chuck 1111C according to the reference example includes a dug surface 121, dots 122, and a seal band 123. That is, the difference is that grooves 124 and 125 are not formed.
- the other configurations are the same, and redundant explanation will be omitted.
- FIG. 6 is an example of a partially enlarged cross-sectional view showing a substrate holding state in the electrostatic chuck 1111 according to one embodiment.
- FIG. 7 is an example of a partially enlarged cross-sectional view showing a substrate holding state in the electrostatic chuck 1111 according to the reference example.
- a film of reaction byproducts when processing the substrate W may be formed on the surface of the electrostatic chuck 1111 (1111C). If the insulation of the reaction by-product film is low, the contact surface on which the substrate W is placed (the upper surface of the dots 122, the seal band The charge 200 leaks from the upper surface of the electrostatic electrode 1111b and moves downward due to the adsorption voltage applied to the electrostatic electrode 1111b and the self-bias voltage of the plasma.
- the charge 200 leaking from the contact surface on which the substrate W is placed (the upper surface of the dots 122, the upper surface of the seal band 123) is removed by the attraction voltage applied to the electrostatic electrode 1111b. It moves to the dug surface 121 that is not in contact with W, and charges 200 are accumulated on the dug surface 121.
- the Coulomb force between the substrate W and the electrostatic chuck 1111C decreases.
- the substrate W may be peeled off from the electrostatic chuck 1111C due to the pressure of the heat transfer gas.
- the charge 200 leaked from the contact surface on which the substrate W is placed (the upper surface of the dots 122, the upper surface of the seal band 123) is applied to the electrostatic electrode 1111b.
- the charge 200 moves to the bottom surfaces of the grooves 124 and 125 due to the attraction voltage, and charges 200 are accumulated on the bottom surfaces of the grooves 124 and 125.
- the dug surface 121 is formed at a position farther away (at a higher position) than the bottom surfaces of the grooves 124 and 125 when viewed from the electrostatic electrode 1111b. Therefore, the charges 200 that have moved to the bottom surfaces of the grooves 124 and 125 are prevented from moving to the dug surface 121 due to the attraction voltage applied to the electrostatic electrode 1111b.
- the Coulomb force is proportional to the area of the surface where the charges 200 are accumulated, and inversely proportional to the distance between the back surface of the substrate W and the surface where the charges 200 are accumulated.
- the surfaces of the electrostatic chuck 1111 on which the charges 200 are accumulated are the bottom surfaces of the grooves 124 and 125. Further, the surface on which the electrostatic chuck 1111C is accumulated is the dug surface 121. Therefore, the electrostatic chuck 1111 can reduce the area of the surface on which the charges 200 are accumulated and reduce the Coulomb force. Furthermore, the electrostatic chuck 1111 can increase the distance between the back surface of the substrate W and the surface where the charges 200 are accumulated, thereby reducing Coulomb force. Thereby, residual adsorption force can be reduced.
- the depth of the grooves 124, 125 (from the digging surface 121 to the grooves 124, 125)
- the residual suction force is approximately 1/45
- the residual suction force is approximately 1/45.
- the residual adsorption force is approximately 1/50.
- the residual adsorption force is approximately 1/100 when the depth of the grooves 124, 125 is 10 to 20 ⁇ m, and the residual adsorption force is about 1/100 when the depth of the grooves 124, 125 is 20 to 50 ⁇ m.
- the force becomes about 1/110, and when the depth of the grooves 124 and 125 is 50 to 100 ⁇ m, the residual adsorption force becomes about 1/150.
- the substrate W can be electrostatically attracted by the dug surface 121. Therefore, it is possible to suppress the substrate W from peeling off from the electrostatic chuck 1111C in a state where the attraction voltage is applied to the electrostatic electrode 1111b. Therefore, since the pressure of the heat transfer gas can be ensured, the cooling performance of the substrate W can be ensured. Moreover, the width of the seal band 123 can be ensured, and the sealing performance of the heat transfer gas can be ensured.
- a process is performed to reduce the residual adsorption force by applying a voltage (for example, -500V) opposite to the adsorption voltage to the electrostatic electrode 1111b.
- a voltage for example, -500V
- charges 200 are accumulated on the bottom surfaces of the small-area grooves 124 and 125, and the charge density is high.
- the grooves 124 and 125 are provided directly above the electrostatic electrode 1111b. Therefore, it is possible to improve the efficiency of removing the charge 200 when performing a process to reduce the residual adsorption force.
- the width of the groove portion 125 is preferably wider than the width of the groove portion 124. Therefore, charges leaked from the seal band 123 having a large contact area with the substrate W can be accumulated in the groove portion 125.
- the electrostatic chuck 1111 has been described as being provided with the grooves 124 and 125, the present invention is not limited to this.
- the groove 125 surrounding the inner circumferential side of the seal band 123 and omit the groove 124 surrounding the dots 122.
- the number of dots 122 is small, in other words, when the sum of the areas of the upper surfaces of the plurality of dots 122 in contact with the substrate W is sufficiently small compared to the area of the upper surface of the seal band 123 in contact with the substrate W. , the amount of charge leaking from the top surface of the dots 122 is smaller than the charge leaking from the top surface of the seal band 123.
- only the groove portion 125 surrounding the inner peripheral side of the seal band 123 may be formed.
- a parallel surface may be provided between the contact surface on which the substrate W is placed (the upper surface of the dots 122 and the upper surface of the seal band 123) toward the bottom surfaces of the grooves 124 and 125.
- This parallel surface may be formed at the same height as the digging surface 121. The area of this parallel surface is formed smaller than the area of the digging surface 121. Even in this configuration, the charge 200 leaking from the contact surface on which the substrate W is placed (the upper surface of the dots 122, the upper surface of the seal band 123) is transferred to the parallel surface by the attraction voltage applied to the electrostatic electrode 1111b, etc. The charge 200 moves and further moves to the bottom surfaces of the grooves 124 and 125, and charges 200 are accumulated on the bottom surfaces of the grooves 124 and 125.
- FIG. 8 is another example of a partially enlarged cross-sectional view showing a substrate holding state in the electrostatic chuck 1111 according to an embodiment. As shown in FIG. 8, a groove 126 may be formed to surround the outer circumferential side of the seal band 123.
- the electrostatic chuck 1111 has been described using an example of a configuration in which the substrate W is attracted by Coulomb force, the structure is not limited to this, and the electrostatic chuck 1111 can also be applied to a configuration in which the substrate W is attracted by the Johnson-Rahbek effect.
- the electrostatic electrode 1111b of the electrostatic chuck 1111 has been described using a monopolar structure as an example, it is not limited to this, and may have a multipolar structure, or may have a monopolar structure. It may also be a bipolar configuration.
- the embodiments disclosed above include, for example, the following aspects.
- dielectric and an electrode provided inside the dielectric The dielectric is a first main surface; a contact support portion that protrudes from the first main surface and supports the substrate by contacting the back surface of the substrate;
- An electrostatic chuck comprising: a groove provided between the first main surface and the contact support part so as to surround the contact support part.
- the contact support portion is a seal band formed in an annular shape along the peripheral edge of the first main surface.
- the electrostatic chuck described in Appendix 1. Additional note 3
- the groove portion is provided on the inner peripheral side of the seal band, The electrostatic chuck described in Appendix 2.
- the groove portion is provided on the outer peripheral side of the seal band, The electrostatic chuck according to Appendix 2 or 3.
- the contact support portion is a dot formed in a columnar shape, The electrostatic chuck according to any one of Supplementary Notes 1 to 4.
- the width of the groove is 5 ⁇ m or more and 150 ⁇ m or less, The electrostatic chuck according to any one of Supplementary notes 1 to 5.
- the depth of the groove is 10 ⁇ m or more and 100 ⁇ m or less, The electrostatic chuck according to any one of Supplementary notes 1 to 5.
- the electrostatic chuck has a plurality of the contact support parts, The groove portion is provided for each of the plurality of contact support portions, The electrostatic chuck according to any one of Supplementary notes 1 to 7. (Appendix 9) The groove portion is continuously provided so as to surround the contact support portion. The electrostatic chuck according to any one of Supplementary notes 1 to 8. (Appendix 10) The groove portion is provided discretely so as to surround the contact support portion, The electrostatic chuck according to any one of Supplementary notes 1 to 8. (Appendix 11) The electrostatic chuck has a flow path, The opening of the flow path is formed on the first main surface. The electrostatic chuck according to any one of Supplementary notes 1 to 10.
- the contact support portion includes a first contact support portion formed in an annular shape along a peripheral edge of the first main surface, and a plurality of columnar contact support portions formed in an inner region of the first contact support portion. 2 contact supports;
- the groove portion includes a first groove surrounding the first contact support portion, and a plurality of second grooves provided for each of the plurality of second contact support portions.
- the electrostatic chuck described in Appendix 1. (Appendix 13) The groove portion is formed directly above the electrode, The electrostatic chuck according to any one of Supplementary notes 1 to 12.
- the bottom surface of the groove is formed at a position closer to the electrode than the first main surface.
- the electrostatic chuck according to appendix 13. (Additional note 15) Equipped with the electrostatic chuck according to any one of Supplementary notes 1 to 14, Substrate processing equipment.
- Plasma processing equipment 11 Substrate support section 14 Channel 15 Heat transfer gas supply section 111 Main body section 111a Central region 111b Annular region 1110 Base 1111, 1111C Electrostatic chuck 1111a Ceramic member (dielectric) 1111b Electrostatic electrode (electrode) 112 Ring assembly 121 Digging surface (first main surface) 122 dots (contact support part) 123 Seal band (contact support part) 124, 125, 126 Groove 141 Channel 142 Opening 200 Charge
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Analytical Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Power Engineering (AREA)
- Computer Hardware Design (AREA)
- General Physics & Mathematics (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Container, Conveyance, Adherence, Positioning, Of Wafer (AREA)
Abstract
Description
(付記1)
誘電体と、
前記誘電体の内部に設けられた電極と、を備え、
前記誘電体は、
第1主面と、
前記第1主面よりも突出し、基板裏面に接触して前記基板を支持する接触支持部と、
前記第1主面と前記接触支持部との間で前記接触支持部を囲むように設けられた溝部と、を有する、静電チャック。
(付記2)
前記接触支持部は、前記第1主面の周縁部に沿って円環状に形成されたシールバンドである、
付記1に記載の静電チャック。
(付記3)
前記溝部は、前記シールバンドの内周側に設けられる、
付記2に記載の静電チャック。
(付記4)
前記溝部は、前記シールバンドの外周側に設けられる、
付記2または付記3に記載の静電チャック。
(付記5)
前記接触支持部は、柱状に形成されたドットである、
付記1乃至付記4のいずれか1項に記載の静電チャック。
(付記6)
前記溝部の幅は、5μm以上150μm以下である、
付記1乃至付記5のいずれか1項に記載の静電チャック。
(付記7)
前記溝部の深さは、10μm以上100μm以下である、
付記1乃至付記5のいずれか1項に記載の静電チャック。
(付記8)
前記静電チャックは、複数の前記接触支持部を有し、
前記溝部は、複数の前記接触支持部ごとに設けられている、
付記1乃至付記7のいずれか1項に記載の静電チャック。
(付記9)
前記溝部は、前記接触支持部を囲むように連続的に設けられている、
付記1乃至付記8のいずれか1項に記載の静電チャック。
(付記10)
前記溝部は、前記接触支持部を囲むように離散的に設けられている、
付記1乃至付記8のいずれか1項に記載の静電チャック。
(付記11)
前記静電チャックは、流路を有し、
前記流路の開口部は、前記第1主面に形成される、
付記1乃至付記10のいずれか1項に記載の静電チャック。
(付記12)
前記接触支持部は、前記第1主面の周縁部に沿って円環状に形成された第1の接触支持部と、前記第1の接触支持部の内側領域に柱状に形成された複数の第2の接触支持部と、を含み、
前記溝部は、前記第1の接触支持部を囲む第1の溝と、複数の前記第2の接触支持部ごとに設けられた複数の第2の溝と、を含む、
付記1に記載の静電チャック。
(付記13)
前記溝部は、前記電極の直上に形成される、
付記1乃至付記12のいずれか1項に記載の静電チャック。
(付記14)
前記溝部の底面は、前記第1主面よりも前記電極に近い位置に形成される、
付記13に記載の静電チャック。
(付記15)
付記1乃至付記14のいずれか1項に記載の静電チャックを備える、
基板処理装置。
11 基板支持部
14 流路
15 伝熱ガス供給部
111 本体部
111a 中央領域
111b 環状領域
1110 基台
1111,1111C 静電チャック
1111a セラミック部材(誘電体)
1111b 静電電極(電極)
112 リングアセンブリ
121 掘込面(第1主面)
122 ドット(接触支持部)
123 シールバンド(接触支持部)
124,125,126 溝部
141 流路
142 開口部
200 電荷
Claims (15)
- 誘電体と、
前記誘電体の内部に設けられた電極と、を備え、
前記誘電体は、
第1主面と、
前記第1主面よりも突出し、基板裏面に接触して前記基板を支持する接触支持部と、
前記第1主面と前記接触支持部との間で前記接触支持部を囲むように設けられた溝部と、を有する、静電チャック。 - 前記接触支持部は、前記第1主面の周縁部に沿って円環状に形成されたシールバンドである、
請求項1に記載の静電チャック。 - 前記溝部は、前記シールバンドの内周側に設けられる、
請求項2に記載の静電チャック。 - 前記溝部は、前記シールバンドの外周側に設けられる、
請求項3に記載の静電チャック。 - 前記接触支持部は、柱状に形成されたドットである、
請求項1に記載の静電チャック。 - 前記溝部の幅は、5μm以上150μm以下である、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記溝部の深さは、10μm以上100μm以下である、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記静電チャックは、複数の前記接触支持部を有し、
前記溝部は、複数の前記接触支持部ごとに設けられている、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記溝部は、前記接触支持部を囲むように連続的に設けられている、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記溝部は、前記接触支持部を囲むように離散的に設けられている、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記静電チャックは、流路を有し、
前記流路の開口部は、前記第1主面に形成される、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記接触支持部は、前記第1主面の周縁部に沿って円環状に形成された第1の接触支持部と、前記第1の接触支持部の内側領域に柱状に形成された複数の第2の接触支持部と、を含み、
前記溝部は、前記第1の接触支持部を囲む第1の溝と、複数の前記第2の接触支持部ごとに設けられた複数の第2の溝と、を含む、
請求項1に記載の静電チャック。 - 前記溝部は、前記電極の直上に形成される、
請求項1乃至請求項5のいずれか1項に記載の静電チャック。 - 前記溝部の底面は、前記第1主面よりも前記電極に近い位置に形成される、
請求項13に記載の静電チャック。 - 請求項1乃至請求項5のいずれか1項に記載の静電チャックを備える、
基板処理装置。
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020247043542A KR20250019707A (ko) | 2022-09-12 | 2023-09-01 | 정전 척 및 기판 처리 장치 |
| JP2024546865A JP7727858B2 (ja) | 2022-09-12 | 2023-09-01 | 静電チャック及び基板処理装置 |
| CN202380049739.9A CN119452466A (zh) | 2022-09-12 | 2023-09-01 | 静电吸盘和基片处理装置 |
| US19/006,650 US20250157845A1 (en) | 2022-09-12 | 2024-12-31 | Electrostatic chuck and substrate processing apparatus |
| JP2025133533A JP2025159102A (ja) | 2022-09-12 | 2025-08-08 | 静電チャック及び基板処理装置 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2022-144886 | 2022-09-12 | ||
| JP2022144886 | 2022-09-12 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US19/006,650 Continuation US20250157845A1 (en) | 2022-09-12 | 2024-12-31 | Electrostatic chuck and substrate processing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2024057973A1 true WO2024057973A1 (ja) | 2024-03-21 |
Family
ID=90275155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2023/032079 Ceased WO2024057973A1 (ja) | 2022-09-12 | 2023-09-01 | 静電チャック及び基板処理装置 |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US20250157845A1 (ja) |
| JP (2) | JP7727858B2 (ja) |
| KR (1) | KR20250019707A (ja) |
| CN (1) | CN119452466A (ja) |
| TW (1) | TW202428930A (ja) |
| WO (1) | WO2024057973A1 (ja) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025212929A1 (en) * | 2024-04-04 | 2025-10-09 | Applied Materials, Inc. | Electrostatic chuck with perforated or screened chucking electrode |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004022888A (ja) * | 2002-06-18 | 2004-01-22 | Anelva Corp | 静電吸着装置 |
| JP2014090038A (ja) * | 2012-10-30 | 2014-05-15 | Kyocera Corp | 吸着部材 |
| WO2019188681A1 (ja) * | 2018-03-26 | 2019-10-03 | 日本碍子株式会社 | 静電チャックヒータ |
| JP2020088195A (ja) * | 2018-11-27 | 2020-06-04 | 東京エレクトロン株式会社 | 基板保持機構および成膜装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5973840B2 (ja) | 2011-12-20 | 2016-08-23 | 東京エレクトロン株式会社 | 離脱制御方法及びプラズマ処理装置 |
| JP7288308B2 (ja) | 2019-02-12 | 2023-06-07 | 日本特殊陶業株式会社 | 保持装置の製造方法 |
-
2023
- 2023-08-25 TW TW112132061A patent/TW202428930A/zh unknown
- 2023-09-01 JP JP2024546865A patent/JP7727858B2/ja active Active
- 2023-09-01 KR KR1020247043542A patent/KR20250019707A/ko active Pending
- 2023-09-01 CN CN202380049739.9A patent/CN119452466A/zh active Pending
- 2023-09-01 WO PCT/JP2023/032079 patent/WO2024057973A1/ja not_active Ceased
-
2024
- 2024-12-31 US US19/006,650 patent/US20250157845A1/en active Pending
-
2025
- 2025-08-08 JP JP2025133533A patent/JP2025159102A/ja active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004022888A (ja) * | 2002-06-18 | 2004-01-22 | Anelva Corp | 静電吸着装置 |
| JP2014090038A (ja) * | 2012-10-30 | 2014-05-15 | Kyocera Corp | 吸着部材 |
| WO2019188681A1 (ja) * | 2018-03-26 | 2019-10-03 | 日本碍子株式会社 | 静電チャックヒータ |
| JP2020088195A (ja) * | 2018-11-27 | 2020-06-04 | 東京エレクトロン株式会社 | 基板保持機構および成膜装置 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025212929A1 (en) * | 2024-04-04 | 2025-10-09 | Applied Materials, Inc. | Electrostatic chuck with perforated or screened chucking electrode |
Also Published As
| Publication number | Publication date |
|---|---|
| JP7727858B2 (ja) | 2025-08-21 |
| KR20250019707A (ko) | 2025-02-10 |
| US20250157845A1 (en) | 2025-05-15 |
| TW202428930A (zh) | 2024-07-16 |
| CN119452466A (zh) | 2025-02-14 |
| JP2025159102A (ja) | 2025-10-17 |
| JPWO2024057973A1 (ja) | 2024-03-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN114883166A (zh) | 基片支承体和基片处理装置 | |
| WO2023095707A1 (ja) | 静電チャック及びプラズマ処理装置 | |
| JP2025159102A (ja) | 静電チャック及び基板処理装置 | |
| KR20240120658A (ko) | 플라즈마 처리 장치, 정전 척 및 플라즈마 처리 방법 | |
| WO2023074475A1 (ja) | プラズマ処理装置及び静電チャック | |
| WO2023176555A1 (ja) | プラズマ処理装置及びプラズマ処理方法 | |
| JP2023165222A (ja) | 静電チャック、基板支持アセンブリ、及びプラズマ処理装置 | |
| JP7583229B1 (ja) | 静電チャック | |
| JP2023002987A (ja) | 基板支持器、プラズマ処理装置、及びエッジリング | |
| JP7723172B1 (ja) | 静電チャック | |
| US20250183086A1 (en) | Electrostatic chuck and substrate processing apparatus | |
| US20240339303A1 (en) | Substrate support and plasma processing apparatus | |
| US20230298864A1 (en) | Upper electrode and plasma processing apparatus | |
| JP2025127899A (ja) | プラズマ処理装置 | |
| CN120500912A (zh) | 基板处理装置以及静电卡盘 | |
| JP2025171738A (ja) | 基板処理装置及び静電チャック | |
| WO2026004597A1 (ja) | プラズマ処理装置 | |
| JP2024111591A (ja) | プラズマ処理装置 | |
| TW202441697A (zh) | 基板處理裝置及靜電吸盤 | |
| WO2025004883A1 (ja) | プラズマ処理装置 | |
| JP2025024576A (ja) | プラズマ処理装置 | |
| JP2024094874A (ja) | プラズマ処理装置 | |
| WO2023058475A1 (ja) | プラズマ処理装置 | |
| WO2025263340A1 (ja) | 基板支持器及び基板処理装置 | |
| JP2026004103A (ja) | プラズマ処理装置及びプラズマ処理方法 |
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: 23865328 Country of ref document: EP Kind code of ref document: A1 |
|
| ENP | Entry into the national phase |
Ref document number: 2024546865 Country of ref document: JP Kind code of ref document: A |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 202380049739.9 Country of ref document: CN |
|
| ENP | Entry into the national phase |
Ref document number: 20247043542 Country of ref document: KR Kind code of ref document: A |
|
| WWP | Wipo information: published in national office |
Ref document number: 1020247043542 Country of ref document: KR |
|
| WWP | Wipo information: published in national office |
Ref document number: 202380049739.9 Country of ref document: CN |
|
| NENP | Non-entry into the national phase |
Ref country code: DE |
|
| WWE | Wipo information: entry into national phase |
Ref document number: 11202501459Q Country of ref document: SG |
|
| WWP | Wipo information: published in national office |
Ref document number: 11202501459Q Country of ref document: SG |
|
| 122 | Ep: pct application non-entry in european phase |
Ref document number: 23865328 Country of ref document: EP Kind code of ref document: A1 |