WO2020153071A1 - セラミックヒータ - Google Patents
セラミックヒータ Download PDFInfo
- Publication number
- WO2020153071A1 WO2020153071A1 PCT/JP2019/050259 JP2019050259W WO2020153071A1 WO 2020153071 A1 WO2020153071 A1 WO 2020153071A1 JP 2019050259 W JP2019050259 W JP 2019050259W WO 2020153071 A1 WO2020153071 A1 WO 2020153071A1
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- WIPO (PCT)
- Prior art keywords
- zone
- resistance heating
- peripheral side
- heating element
- outer peripheral
- Prior art date
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- 239000000919 ceramic Substances 0.000 title claims abstract description 64
- 238000010438 heat treatment Methods 0.000 claims abstract description 87
- 230000002093 peripheral effect Effects 0.000 claims description 104
- 230000036581 peripheral resistance Effects 0.000 claims description 13
- 235000012431 wafers Nutrition 0.000 description 21
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 4
- 229910052721 tungsten Inorganic materials 0.000 description 4
- 239000010937 tungsten Substances 0.000 description 4
- 238000005530 etching Methods 0.000 description 3
- 239000003870 refractory metal Substances 0.000 description 3
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- QIJNJJZPYXGIQM-UHFFFAOYSA-N 1lambda4,2lambda4-dimolybdacyclopropa-1,2,3-triene Chemical compound [Mo]=C=[Mo] QIJNJJZPYXGIQM-UHFFFAOYSA-N 0.000 description 1
- 229910039444 MoC Inorganic materials 0.000 description 1
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 229910052735 hafnium Inorganic materials 0.000 description 1
- VBJZVLUMGGDVMO-UHFFFAOYSA-N hafnium atom Chemical compound [Hf] VBJZVLUMGGDVMO-UHFFFAOYSA-N 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 239000011733 molybdenum Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229910052702 rhenium Inorganic materials 0.000 description 1
- WUAPFZMCVAUBPE-UHFFFAOYSA-N rhenium atom Chemical compound [Re] WUAPFZMCVAUBPE-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/67—Apparatus specially adapted for handling semiconductor or electric solid state devices during manufacture or treatment thereof; Apparatus specially adapted for handling wafers during manufacture or treatment of semiconductor or electric solid state devices or components ; Apparatus not specifically provided for elsewhere
- H01L21/67005—Apparatus not specifically provided for elsewhere
- H01L21/67011—Apparatus for manufacture or treatment
- H01L21/67098—Apparatus for thermal treatment
- H01L21/67103—Apparatus for thermal treatment mainly by conduction
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/12—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material
- H05B3/14—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor characterised by the composition or nature of the conductive material the material being non-metallic
- H05B3/141—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds
-
- 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
-
- 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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/023—Industrial applications
- H05B1/0233—Industrial applications for semiconductors manufacturing
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
- H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
- H05B3/28—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material
- H05B3/283—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor embedded in insulating material the insulating material being an inorganic material, e.g. ceramic
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
- H05B2203/005—Heaters using a particular layout for the resistive material or resistive elements using multiple resistive elements or resistive zones isolated from each other
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
- H05B2203/016—Heaters using particular connecting means
Definitions
- the present invention relates to a ceramic heater.
- ⁇ Semiconductor manufacturing equipment uses ceramic heaters to heat wafers.
- a so-called two-zone heater is known as such a ceramic heater.
- As a two-zone heater of this type as disclosed in Patent Document 1, an inner peripheral resistance heating element and an outer peripheral resistance heating element are embedded in the same plane in a ceramic substrate, and It is known that the heat generated from each resistance heating element is independently controlled by independently applying a voltage.
- Each resistance heating element is composed of a coil made of a refractory metal such as tungsten.
- the present invention has been made to solve such a problem, and its main purpose is to suppress the occurrence of temperature unevenness in the inner peripheral side zone.
- the ceramic heater of the present invention is A ceramic plate having a wafer mounting surface and having a circular inner peripheral side zone and an annular outer peripheral side zone, A two-dimensionally shaped inner peripheral side resistance heating element provided in the inner peripheral side zone, A coil-shaped outer peripheral resistance heating element provided in the outer peripheral zone, Equipped with In the inner peripheral side zone, the terminal of the inner peripheral side resistance heating element and the terminal of the outer peripheral side resistance heating element are arranged, It is a thing.
- a coil-shaped resistance heating element on the outer peripheral side is arranged in the outer peripheral zone, so a relatively large amount of heat can be obtained.
- the two-dimensional shape is adopted as the shape of the resistance heating element on the inner circumference side instead of the coil shape, it is possible to reduce the line width and the space between the lines. Therefore, it is possible to suppress the occurrence of temperature unevenness in the inner peripheral side zone.
- the resistance heating element on the inner peripheral side may be wired over the entire inner peripheral side zone through the gap between the terminals. Since the two-dimensional shape is adopted as the shape of the resistance heating element on the inner circumference side, it is possible to reduce the line width or the space between the lines. Therefore, the resistance heating element on the inner peripheral side can be wired over the entire inner peripheral side zone through the gap between the terminals.
- the area of the inner peripheral side zone may be smaller than the area of the outer peripheral side zone. Even in such a case, since the inner resistance heating element has a two-dimensional shape and the line width can be narrowed or the space between lines can be narrowed, the inner resistance heating element can be Can be wired throughout.
- the resistance heating element on the inner peripheral side and the resistance heating element on the outer peripheral side may be provided on the same plane parallel to the wafer mounting surface inside the ceramic plate.
- parallel includes not only the case of being completely parallel but also the case of being substantially parallel (for example, within the range of tolerance).
- the term “same” includes not only the case of being completely the same but also the case of being substantially the same (for example, within the range of tolerance).
- the inner peripheral side zone is one zone
- the outer peripheral side zone is divided into two or more zones
- the outer peripheral side resistance heating element is independent for each zone. And may be wired. Since the outer peripheral resistance heating element is independently wired in each of the two or more zones, the number of terminals of the outer peripheral resistance heating element increases in accordance with the number of zones. Further, it is necessary to wire the inner resistance heating element so as to pass between more terminals. Even in such a case, since the inner resistance heating element has a two-dimensional shape and the line width can be narrowed or the space between the lines can be narrowed, the inner resistance heating element can be Can be wired throughout.
- FIG. 3 is a vertical sectional view of the ceramic heater 10. Sectional drawing when the ceramic plate 20 is horizontally cut along the resistance heating elements 22, 24, 26, and 28 and seen from above.
- FIG. 1 is a perspective view of the ceramic heater 10
- FIG. 2 is a vertical sectional view of the ceramic heater 10 (a sectional view when the ceramic heater 10 is cut along a plane including a central axis)
- FIG. 3 is a resistance heating element 22 of a ceramic plate 20.
- 24, 26, 28 is a cross-sectional view when it is horizontally cut and viewed from above.
- FIG. 3 shows a state in which the ceramic plate 20 is substantially viewed from the wafer mounting surface 20a. It should be noted that in FIG. 3, hatching showing the cut surface is omitted.
- the ceramic heater 10 is used to heat a wafer to be subjected to processing such as etching and CVD, and is installed in a vacuum chamber (not shown).
- the ceramic heater 10 has a disk-shaped ceramic plate 20 having a wafer mounting surface 20a, and a ceramic plate 20 coaxial with the ceramic plate 20 on a surface (back surface) 20b of the ceramic plate 20 opposite to the wafer mounting surface 20a. And a tubular shaft 40 joined together.
- the ceramic plate 20 is a disc-shaped plate made of a ceramic material typified by aluminum nitride or alumina.
- the diameter of the ceramic plate 20 is, for example, about 300 mm.
- the wafer mounting surface 20a of the ceramic plate 20 is provided with fine irregularities (not shown) by embossing.
- the ceramic plate 20 is divided into a small circular inner peripheral side zone Z1 and an annular outer peripheral side zone Z2 by a virtual boundary BL (see FIG. 3) concentric with the ceramic plate 20.
- the diameter of the virtual boundary BL is, for example, about 200 mm.
- the area of the inner peripheral side zone Z1 is smaller than the area of the outer peripheral side zone Z2.
- the outer peripheral side zone Z2 is divided into three annular zones, that is, outer peripheral side first to third zones Z21 to Z23 by virtual boundaries BL1 and BL2 (see FIG. 3) concentric with the ceramic plate 20.
- An inner peripheral side resistance heating element 22 is embedded in the inner peripheral side zone Z1 of the ceramic plate 20, and outer peripheral side first to third resistive heating elements 24, 26, in the outer peripheral side first to third zones Z21 to Z23, respectively. 28 is buried. These resistance heating elements 22, 24, 26, 28 are provided on the same plane parallel to the wafer mounting surface 20a.
- the inner resistance heating element 22 includes a pair of terminals 22a arranged in the central portion of the ceramic plate 20 (a region of the back surface 20b of the ceramic plate 20 surrounded by the cylindrical shaft 40). , 22b from one side to the other side.
- the resistance heating element 22 on the inner circumference side starts from the terminal 22a, passes through the terminals 24a, 24b, 26a, 26b, 28a, and 28b, and is folded back at a plurality of folding portions in a one-stroke manner. It is formed so as to reach the terminal 22b after being wired in almost the entire area of the circumferential zone Z1.
- the inner resistance heating element 22 is a two-dimensional heating element made of a refractory metal or a carbide thereof, and is produced by printing a paste, for example.
- Examples of the two-dimensional shape include a ribbon shape (flat and elongated shape) and a mesh shape.
- the refractory metal include tungsten, molybdenum, tantalum, platinum, rhenium, hafnium and alloys thereof.
- Examples of the carbide of the high melting point metal include tungsten carbide and molybdenum carbide. Since the inner resistance heating element 22 has a two-dimensional shape, the line width can be reduced, the distance between the lines can be reduced, the length between terminals can be increased, and the cross-sectional area can be reduced. Therefore, by adjusting these, the electrical resistance between the terminals of the inner resistance heating element 22 can be easily adjusted.
- the outer peripheral side first resistance heating element 24 originates from one of the pair of terminals 24a and 24b arranged in the central portion of the ceramic plate 20 and is folded back at the folding portion in a one-stroke writing manner. It is formed so as to reach the other of the pair of terminals 24a and 24b after being wired over substantially the entire area of the outer peripheral side first zone Z21.
- the outer peripheral second resistance heating element 26 originates from one of the pair of terminals 26a and 26b arranged in the central portion of the ceramic plate 20 and is folded back at the folded portion in a one-stroke writing manner while being in the outer peripheral second zone.
- the wiring is formed over almost the entire area of Z22 and then reaches the other of the pair of terminals 26a and 26b.
- the outer peripheral side third resistance heating element 28 originates from one of the pair of terminals 28a and 28b arranged in the central portion of the ceramic plate 20, and is folded back at the folding portion in a one-stroke writing manner while being in the outer peripheral side third zone. It is formed so as to reach almost the entire area of Z23 and then reach the other of the pair of terminals 28a and 28b.
- the first to third resistance heating elements 24, 26, 28 on the outer peripheral side are coils made of a high melting point metal or a carbide thereof. However, a lead wire from each terminal 24a, 24b to the outer peripheral side first zone Z21 and a lead wire from each terminal 26a, 26b to the outer peripheral side second zone Z22 and each terminal 28a, 28b to the outer peripheral side third zone Z23.
- the leader line is made of a wire line or a printed ribbon rather than a coil.
- the tubular shaft 40 is made of a ceramic such as aluminum nitride or alumina, like the ceramic plate 20.
- the cylindrical shaft 40 has an inner diameter of, for example, about 40 mm and an outer diameter of, for example, about 60 mm.
- the upper end of the tubular shaft 40 is diffusion bonded to the ceramic plate 20.
- power supply rods 42a and 42b connected to the pair of terminals 22a and 22b of the inner resistance heating element 22 are arranged inside the tubular shaft 40.
- the power supply rods 44 a and 44 b connected to the pair of terminals 24 a and 24 b of the outer peripheral side first resistance heating element 24 and the pair of terminals of the outer peripheral side second resistance heating element 26 are connected.
- Power supply rods 46a and 46b connected to 26a and 26b, respectively, and power supply rods 48a and 48b connected to the pair of terminals 28a and 28b of the outer peripheral third resistance heating element 28 are also arranged.
- the power supply rods 42a and 42b are connected to the inner power supply side 32
- the power supply rods 44a and 44b are connected to the outer power supply side first power supply 34
- the power supply rods 46a and 46b are connected to the outer power supply side second power supply 36
- the power supply rod 48a. , 48b are connected to the outer peripheral third power source 38. Therefore, the inner peripheral side zone Z1 heated by the inner peripheral side resistance heating element 22 and the outer peripheral side zones Z21, Z22, Z23 heated by the outer peripheral side first to third resistance heating elements 24, 26, 28 are individually provided. The temperature can be controlled.
- the ceramic heater 10 is installed in a vacuum chamber (not shown), and the wafer W is mounted on the wafer mounting surface 20a of the ceramic heater 10. Then, the power supplied to the inner resistance heater 22 is supplied to the inner resistance heating element 22 so that the temperature of the inner zone Z1 detected by the inner thermocouple (not shown) becomes a predetermined inner target temperature. Adjust by 32. Further, the temperature of the outer peripheral side first to third zones Z21 to Z23 respectively detected by the outer peripheral side first to third thermocouples is set so as to reach the predetermined outer peripheral side first to third target temperatures. The power supplied to the first to third resistance heating elements 24, 26, 28 is adjusted by the first to third power sources 34, 36, 38 on the outer peripheral side.
- the temperature of the wafer W is controlled to a desired temperature.
- the inside of the vacuum chamber is set to a vacuum atmosphere or a reduced pressure atmosphere, plasma is generated in the vacuum chamber, and the wafer W is subjected to CVD film formation or etching using the plasma.
- coil-shaped outer peripheral side first to third resistance heating elements 24, 26, 28 are provided in the outer peripheral side zone Z2 (outer peripheral side first to third zones Z21 to Z23). Since it is arranged, a relatively large amount of heat can be obtained. On the other hand, since the two-dimensional shape is adopted as the shape of the inner resistance heating element 22 instead of the coil shape, it is possible to reduce the line width or the space between the lines. Therefore, it is possible to suppress the occurrence of temperature unevenness in the inner circumferential side zone Z1.
- the inner resistance heating element 22 is wired over the entire inner circumference zone Z1 through the gaps between the terminals 22a, 22b, 24a, 24b, 26a, 26b, 28a, 28b.
- the inner peripheral resistance heating element 22 can be wired over the entire inner peripheral zone Z1 through the gap between the terminals.
- the area of the inner peripheral side zone Z1 is smaller than the area of the outer peripheral side zone Z2, but even in such a case, the inner peripheral side resistance heating element 22 has a two-dimensional shape and the line width is thin. Since the distance between the lines can be narrowed, the inner peripheral resistance heating element 22 can be wired over the entire inner peripheral zone Z1.
- the outer peripheral side zone Z2 is divided into three outer peripheral side first to third zones Z21 to Z23, and the outer peripheral side first to third resistance heating elements 24, 26 and 28 are independent of each zone. It is wired. Therefore, a total of eight terminals are arranged in the inner peripheral zone Z1. Even in such a case, since the inner resistance heating element 22 has a two-dimensional shape and the line width can be reduced or the distance between the lines can be reduced, the inner resistance heating element 22 is Wiring can be provided throughout the side zone Z1.
- the inner peripheral resistance heating element 22 by changing the electric resistance between the terminals of the inner peripheral resistance heating element 22 according to the cross-sectional area of the inner peripheral resistance heating element 22 and the length of the wiring, the inner peripheral resistance heating element 22 is changed.
- the electric resistance between the terminals may be set to be higher than the electric resistance between the terminals of the outer peripheral first to third resistance heating elements 24, 26, 28.
- the electric resistance between the terminals of the inner peripheral resistance heating element 22 may be set to be lower than the electric resistance between the respective terminals of the outer peripheral first to third resistance heating elements 24, 26, 28. You may set so that it may become the same. In this way, the heat generation amount of the inner resistance heating element 22 in the inner zone Z1 can be appropriately set according to the user's request.
- the outer peripheral side zone Z2 is divided into three small zones, but the outer peripheral side zone Z2 may be one zone, may be divided into two small zones, or four or more. It may be divided into small zones. In either case, the resistance heating element is wired independently for each zone.
- the small zone may be formed in an annular shape by dividing the outer peripheral side zone Z2 at the boundary line of the concentric circle with the ceramic plate 20 as in the above-described embodiment, or may be a line segment extending radially from the center of the ceramic plate 20.
- the outer peripheral side zone Z2 may be divided to form a fan shape (a shape in which the side surface of a truncated cone is developed).
- the inner zone Z1 is described as one zone, but it may be divided into a plurality of small zones. In that case, a two-dimensional resistance heating element is wired independently for each small zone.
- the small zone may be formed into an annular shape and a circular shape by dividing the inner peripheral side zone Z1 at the boundary line of the ceramic plate 20 and a concentric circle, or may be a line segment radially extending from the center of the ceramic plate 20 to the inner peripheral side. It may be formed into a fan shape (a shape in which the side surface of a cone is developed) by dividing the zone Z1.
- a material having a high volume resistivity may be used.
- an example of the volume resistivity at 20° C. is 5.5 ⁇ 10 6 [ ⁇ m] for tungsten and 53 ⁇ 10 6 [ ⁇ m] for tungsten carbide. Therefore, when tungsten carbide is used, the electric resistance between the terminals can be increased as compared with the case where tungsten is used.
- the ceramic plate 20 may have an electrostatic electrode built therein.
- the wafer W can be electrostatically attracted to the wafer mounting surface 20a by applying a voltage to the electrostatic electrode after mounting the wafer W on the wafer mounting surface 20a.
- the ceramic plate 20 may have an RF electrode built therein.
- a shower head (not shown) is arranged above the wafer mounting surface 20a with a space provided, and high-frequency power is supplied between the parallel plate electrodes including the shower head and the RF electrodes. By doing so, plasma can be generated and the wafer W can be subjected to CVD film formation or etching using the plasma.
- the electrostatic electrode may also be used as the RF electrode.
- the inner resistance heating element 22 is wired over the entire inner peripheral zone Z1 through the gap between the terminals, but the present invention is not limited to this.
- the inner resistance heating element 22 may be wired over the entire inner peripheral side zone Z1 without passing through the gap between the terminals.
- the present invention can be used for semiconductor manufacturing equipment.
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Abstract
Description
ウエハ載置面を有し、円形の内周側ゾーンと環状の外周側ゾーンとを備えたセラミックプレートと、
前記内周側ゾーンに設けられた二次元形状の内周側抵抗発熱体と、
前記外周側ゾーンに設けられたコイル状の外周側抵抗発熱体と、
を備え、
前記内周側ゾーンには、前記内周側抵抗発熱体の端子と前記外周側抵抗発熱体の端子とが配置されている、
ものである。
Claims (5)
- ウエハ載置面を有し、円形の内周側ゾーンと環状の外周側ゾーンとを備えたセラミックプレートと、
前記内周側ゾーンに設けられた二次元形状の内周側抵抗発熱体と、
前記外周側ゾーンに設けられたコイル状の外周側抵抗発熱体と、
を備え、
前記内周側ゾーンには、前記内周側抵抗発熱体の端子と前記外周側抵抗発熱体の端子とが配置されている、
セラミックヒータ。 - 前記内周側抵抗発熱体は、前記端子の間隙を通って前記内周側ゾーンの全体にわたって配線されている、
請求項1に記載のセラミックヒータ。 - 前記内周側ゾーンの面積は、前記外周側ゾーンの面積より狭い、
請求項1又は2に記載のセラミックヒータ。 - 前記内周側抵抗発熱体と前記外周側抵抗発熱体は、前記セラミックプレートの内部で前記ウエハ載置面に平行な同一平面上に設けられている、
請求項1~3のいずれか1項に記載のセラミックヒータ。 - 前記内周側ゾーンは、1つのゾーンであり、
前記外周側ゾーンは、2つ以上のゾーンに分けられており、前記外周側抵抗発熱体は、前記ゾーンごとに独立して配線されている、
請求項1~4のいずれか1項に記載のセラミックヒータ。
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CN201980077625.9A CN113170535B (zh) | 2019-01-25 | 2019-12-23 | 陶瓷加热器 |
KR1020217013833A KR102581102B1 (ko) | 2019-01-25 | 2019-12-23 | 세라믹 히터 |
US17/302,080 US11984329B2 (en) | 2019-01-25 | 2021-04-23 | Ceramic heater |
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JP2005063691A (ja) * | 2003-08-13 | 2005-03-10 | Ngk Insulators Ltd | 加熱装置 |
JP2009009795A (ja) * | 2007-06-27 | 2009-01-15 | Taiheiyo Cement Corp | セラミックスヒーター |
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JP3897563B2 (ja) | 2001-10-24 | 2007-03-28 | 日本碍子株式会社 | 加熱装置 |
JP3888531B2 (ja) * | 2002-03-27 | 2007-03-07 | 日本碍子株式会社 | セラミックヒーター、セラミックヒーターの製造方法、および金属部材の埋設品 |
JP4761723B2 (ja) * | 2004-04-12 | 2011-08-31 | 日本碍子株式会社 | 基板加熱装置 |
JP4450106B1 (ja) * | 2008-03-11 | 2010-04-14 | 東京エレクトロン株式会社 | 載置台構造及び処理装置 |
TWI501339B (zh) | 2010-09-24 | 2015-09-21 | Ngk Insulators Ltd | Semiconductor manufacturing device components |
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CN113170535B (zh) | 2023-07-07 |
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CN113170535A (zh) | 2021-07-23 |
KR20210066918A (ko) | 2021-06-07 |
US20210242048A1 (en) | 2021-08-05 |
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