WO2009090816A1 - 基板温度制御装置用ステージ - Google Patents
基板温度制御装置用ステージ Download PDFInfo
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- WO2009090816A1 WO2009090816A1 PCT/JP2008/072775 JP2008072775W WO2009090816A1 WO 2009090816 A1 WO2009090816 A1 WO 2009090816A1 JP 2008072775 W JP2008072775 W JP 2008072775W WO 2009090816 A1 WO2009090816 A1 WO 2009090816A1
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- Prior art keywords
- substrate
- plate
- temperature control
- wafer
- stage
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- 239000000758 substrate Substances 0.000 title claims abstract description 111
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 230000001276 controlling effect Effects 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 abstract description 25
- 238000009826 distribution Methods 0.000 abstract description 19
- 238000001816 cooling Methods 0.000 abstract description 8
- 230000001052 transient effect Effects 0.000 abstract description 8
- 239000004065 semiconductor Substances 0.000 description 12
- 238000004088 simulation Methods 0.000 description 12
- 239000000919 ceramic Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 238000012546 transfer Methods 0.000 description 5
- 239000004642 Polyimide Substances 0.000 description 4
- 239000004973 liquid crystal related substance Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229920001721 polyimide Polymers 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000002791 soaking Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
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- 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
- H05B3/143—Conductive ceramics, e.g. metal oxides, metal carbides, barium titanate, ferrites, zirconia, vitrous compounds applied to semiconductors, e.g. wafers heating
-
- 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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67248—Temperature monitoring
-
- 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
- H01L21/687—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 mechanical means, e.g. chucks, clamps or pinches
- H01L21/68714—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 mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support
- H01L21/68735—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 mechanical means, e.g. chucks, clamps or pinches the wafers being placed on a susceptor, stage or support characterised by edge profile or support profile
Definitions
- the present invention relates to a stage used for mounting a substrate in a substrate temperature control apparatus that controls the temperature of the substrate when processing a substrate such as a semiconductor wafer or a liquid crystal panel.
- a substrate such as a semiconductor wafer or a liquid crystal panel.
- a wafer is heated and cooled frequently, such as after applying a resist to the wafer, heating the wafer to remove the resist solvent, and then cooling the wafer. Is called.
- a substrate temperature control device is used to appropriately control the temperature of the substrate.
- the substrate temperature control apparatus includes a stage having a face plate for placing a substrate, and a heating device or a cooling device for heating or cooling the substrate is disposed inside or below the stage.
- a heating wire, an infrared lamp, or a working fluid is used as the heating device, and a Peltier element or a working fluid is used as the cooling device.
- International Publication WO 01/13423 A1 discloses a ceramic plate for a semiconductor manufacturing apparatus for the purpose of making the temperature of a silicon wafer uniform.
- the ceramic plate is a ceramic plate for a semiconductor manufacturing apparatus for mounting a semiconductor wafer on a surface of a ceramic substrate or holding a semiconductor wafer at a certain distance from the surface of the ceramic substrate, and the semiconductor wafer of the ceramic substrate.
- the flatness of the surface on which the material is placed or held is 1 to 50 ⁇ m with respect to the measurement range and the length between the outer peripheral ends of ⁇ 10 mm.
- Japanese Patent Application Publication JP-P2002-198302A describes a semiconductor manufacturing process that is effective for uniforming the temperature distribution on the work surface of the ceramic substrate, that is, the wafer heating surface, and that has excellent response during temperature rise and fall.
- a hot plate for an inspection apparatus is disclosed.
- This hot plate is a hot plate in which a resistance heating element is provided on the surface or inside of an insulating ceramic substrate, and has a shape such that the heat capacity of the outer peripheral portion of the ceramic substrate is relatively smaller than that of the central portion. is doing.
- Japanese Patent Application Publication JP-A-8-124818 discloses a heat treatment apparatus aimed at improving the yield by simplifying the structure and making the heating temperature of the substrate to be processed uniform.
- the heat treatment apparatus includes a mounting table on which the substrate to be processed is mounted, a heating unit that heats the substrate to be processed through the mounting table, and a predetermined interval between the substrate to be processed and the mounting table surface that protrudes on the mounting table.
- the support means is formed by a plurality of supports arranged at predetermined intervals on the mounting table, and the height of the support is set to the heating temperature distribution of the substrate to be processed. It is characterized by being changed accordingly.
- one main surface of a soaking plate made of ceramics is used as a wafer mounting surface, and the other main surface has a heating resistor to heat the wafer.
- An apparatus is disclosed. If the mounting surface becomes concave due to warpage of the heat equalizing plate, the gap between the heat equalizing plate and the wafer increases near the center of the wafer, so when changing the temperature setting of the heat equalizing plate or replacing the wafer When the temperature rise is transient, the heating of the central part seems to be delayed, and the spread of the temperature distribution in the wafer surface becomes large. Therefore, this wafer heating apparatus is characterized in that the mounting surface is convex.
- an object of the present invention is to provide a stage for a substrate temperature control device that can make the spread of a transient temperature distribution generated when heating or cooling a substrate smaller than before. It is.
- a stage for a substrate temperature control device is for placing a substrate having a predetermined diameter at a predetermined position in a substrate temperature control device for controlling the temperature of a substrate.
- a stage that is used the first surface facing the substrate, a plate having a step portion lower than the central portion in a region including a position corresponding to the edge of the substrate, and the first surface of the plate And a temperature control unit disposed on the second surface on the opposite side.
- the substrate is heated by forming a step portion lower than the center portion in a region including a position corresponding to the edge of the substrate on the first surface of the plate facing the substrate.
- the transient temperature distribution that occurs when cooling can be made smaller than before.
- FIG. 2 is a cross-sectional view taken along one-dot chain line II-II shown in FIG. It is sectional drawing which shows typically the plate and heater of the stage for substrate temperature control apparatuses which concern on one Embodiment of this invention with a wafer. It is a figure which shows the experimental result at the time of heating a wafer using the plate which has a concave shape on the upper surface. It is a figure which shows the experimental result at the time of heating a wafer using various plates. It is a figure which shows the experimental result at the time of changing the depth of a groove
- FIG. 1 is a plan view showing a stage for a substrate temperature control apparatus according to an embodiment of the present invention
- FIG. 2 is a cross-sectional view taken along one-dot chain line II-II shown in FIG.
- the substrate temperature control device is a device for controlling the temperature of a substrate in a processing process for a substrate such as a semiconductor wafer or a liquid crystal panel, and includes a stage 1 used for placing the substrate.
- a semiconductor wafer having a diameter of 300 mm is placed on the stage 1 will be described.
- the stage 1 of the substrate temperature control apparatus includes a disk-shaped plate (face plate) 10, and a plurality of protrusions 11 having a height of about 100 ⁇ m are formed on the upper surface of the plate 10. Is provided.
- the protrusions 11 support the lower surface of the wafer to form a gap of about 100 ⁇ m between the wafer and the plate 10, and the wafer contacts the plate 10. Is preventing. This protects the wafer from contaminants adhering to the plate 10.
- a plurality of wafer guides 12 for regulating the position of the edge of the wafer placed on the stage 1 are provided on the periphery of the plate 10.
- a circular sheet-like (planar) heater 20 for heating the wafer is attached to the lower surface of the plate 10 as a temperature control unit. 30 is provided.
- the plate 10 and the heater 20 are fixed to the base plate 50 by a plate fixing screw 41 via a resin ring 42 and a plate column 43.
- the resin ring 42 heat insulation is achieved between the plate 10 and the base plate 50, and the plate 10 slides on the resin ring 42, so that it can move to some extent with respect to the base plate 50.
- An outer peripheral cover 60 is attached around the base plate 50.
- the stage 1 is accommodated in the case of the substrate temperature control device.
- the temperature control unit may be provided with thermoelectric elements over the entire surface or a flow path through which fluid flows, and the plate 10 is used for both heating and cooling. it can.
- FIG. 3 is a cross-sectional view schematically showing a plate and a heater of a stage for a substrate temperature control apparatus according to an embodiment of the present invention together with a wafer.
- the plate 10 is made of a thin aluminum material (A5052) and has a truncated cone shape with a thickness of 6 mm, a long diameter of 340 mm, and a short diameter of 330 mm.
- an alumite layer having a thickness of 15 ⁇ m to 30 ⁇ m may be formed by subjecting the plate 10 to alumite treatment except for a portion to which the heater 20 is bonded.
- the heater 20 includes a polyimide insulating film 21, a thin heating wire 22 made of a stainless steel material (SUS304) patterned on the insulating film 21, and a polyimide insulating film 23 covering the heating wire 22.
- the thickness of the insulating film 21 is 50 ⁇ m
- the thickness of the heating wire 22 is 20 ⁇ m
- the thickness of the insulating film 23 is 25 ⁇ m at the thin portion.
- the polyimide surfaces of the insulating films 21 and 23 are modified so that they are bonded (thermally fused) to other members when heated to 300 ° C. or higher.
- the plate 10, the insulating film 21, and the insulating film 23 are bonded together. These are adhered to each other by hot pressing.
- Aluminum is relatively soft and has a larger linear expansion coefficient than stainless steel and polyimide. Therefore, when the plate 10 is heated by the heater 20, the upper surface (substrate mounting surface) of the plate 10 is deformed into a convex shape. Therefore, in the present embodiment, the substrate mounting surface of the plate 10 is formed so as to tend to have a concave shape at room temperature (flatness: about 0 ⁇ m to 60 ⁇ m).
- a step portion lower than the central portion is formed in a region including a position corresponding to the edge of the substrate.
- This step portion typically has the shape of a groove 10a as shown in FIGS.
- the groove 10a preferably extends from the position corresponding to the edge of the substrate to the distance of 4 mm to 30 mm in the center direction of the plate 10 on the substrate mounting surface of the plate 10. Accordingly, when the diameter of the substrate is 300 mm, the inner diameter D1 of the groove 10a is 240 mm to 292 mm.
- the diameter D2 of the outer periphery of the groove 10a is such that when the central axis of the substrate is shifted from the central axis of the plate 10 by about 2 mm, the groove 10a reduces the area difference (heat transfer area difference) applied to the edge of the substrate. It is desirable not to make it larger than 1 mm beyond the edge. Therefore, when the diameter of the substrate is 300 mm, the outer diameter D2 of the groove 10a is not less than 300 mm and not more than 302 mm. On the other hand, when the displacement of the substrate is small (about 0.5 mm or less), there is no need to set an upper limit on the outer diameter D2 of the groove 10a. Therefore, the groove 10a may extend to the edge of the plate 10. . Including this case, the term “stepped portion” is used in the present application.
- the groove 10a is formed on the substrate mounting surface of the plate 10, the outer peripheral side of the plurality of protrusions 11 and the inner peripheral side of the plurality of guide members (wafer guides) 12, A groove 10a is formed. Accordingly, when the substrate 10 is placed on the stage so that the central axis of the substrate overlaps the central axis of the plate 10, the groove 10 a covers the edge of the substrate. Even in this case, it is desirable that the inner diameter D1 and the outer diameter D2 of the groove 10a satisfy the above conditions.
- the groove 10a is formed on the inner peripheral side of the plurality of guide members (wafer guides) 12 on the substrate mounting surface of the plate 10, and the range in which the grooves 10a are formed.
- a plurality of projections 11 are arranged so that at least one projection is applied to the first projection. That is, at least one entire protrusion may exist in the range where the groove 10a is formed, or a part of the protrusion may exist in the range where the groove 10a is formed. Accordingly, when the substrate 10 is placed on the stage so that the central axis of the substrate overlaps the central axis of the plate 10, the groove 10 a covers the edge of the substrate. Even in this case, it is desirable that the inner diameter D1 and the outer diameter D2 of the groove 10a satisfy the above conditions.
- the wafer 70 When the wafer 70 is heated by using the substrate temperature control device, heat flows into the wafer 70 from the outer peripheral portion of the plate 10, and when the wafer 70 is placed on the plate 10, the wafer 70 is bent upward. Due to the influence of a time delay until the wafer 70 becomes parallel to the plate 10, a transient temperature distribution in which the temperature increases toward the outer periphery is generated in the wafer 70.
- the temperature of the outer peripheral portion of the wafer 70 is likely to be non-uniform compared to the central portion, but by forming the groove 10a in the plate 10, the gap between the plate 10 and the wafer 70 is increased. Since it becomes large, the temperature non-uniformity depending on the flatness of the plate 10 and the wafer 70 is alleviated.
- the depth (x), size (D1, D2) and shape of the groove 10a are optimized, it is possible to realize a transient temperature distribution close to flat.
- the plate 10 having a concave shape on the upper surface is used, the spread of the temperature distribution in the wafer tends to be larger than when a plate having a flat or convex shape on the upper surface is used.
- the present invention is particularly effective in such a case.
- FIG. 4 is a diagram showing experimental results when a wafer is heated using a plate having a concave shape on the upper surface.
- the flatness of the upper surface at room temperature is 58 ⁇ m.
- a plate without a groove (Comparative Example) and a plate with a groove (Example) are used.
- the depth of the groove is distributed from 54 ⁇ m to 189 ⁇ m on the circumference, and the average value is 130 ⁇ m.
- FIG. 4 shows a plurality of wafer temperatures measured at a plurality of measurement points in the wafer surface when the wafer is heated, and a temperature range which is a difference between the maximum value and the minimum value at those temperatures. ing.
- the temperature range is expanded to about 6.8 ° C. at the maximum.
- the temperature range is as small as about 4.4 ° C. at the maximum, and it can be said that the temperature distribution of the wafer is uniform.
- FIG. 5 is a diagram showing experimental results when the wafer is heated using various plates.
- the upper surface has a convex shape (flatness: 40 ⁇ m), a plate without a groove (Comparative Example 1), and the upper surface has a concave shape (flatness: 40 ⁇ m), and the groove has The plate not formed (Comparative Example 2) is compared with the plate (Example) having a concave shape on the upper surface (flatness: 60 ⁇ m) and having grooves.
- the inner diameter of the groove is 292 mm
- the outer diameter of the groove is 306 mm
- the width of the groove is 7 mm.
- the average value of the groove depth is 130 ⁇ m. Note that the measured values of flatness have different signs (positive and negative) when the upper surface of the plate has a convex shape and when the upper surface of the plate has a concave shape.
- the in-plane average temperature which is the average value of a plurality of temperatures measured at a plurality of measurement points in the wafer surface, and the maximum value and the minimum value at those temperatures.
- the in-plane temperature range is shown.
- the plate having the concave shape on the upper surface has a maximum in-plane temperature range of about 7.5 ° C.
- the plate having the convex shape on the upper surface Comparative Example 1 has an in-plane temperature range of about 5.3 ° C. at the maximum, which is advantageous in terms of the temperature distribution of the wafer.
- the in-plane temperature range can be about 4.4 ° C. at the maximum.
- the difference in the rising speed of the in-plane average temperature in FIG. 5 depends on the shape (unevenness) and flatness of the plate.
- FIG. 6 is a diagram showing experimental results when the depth of the groove is changed.
- a plate having a concave shape on the upper surface flatness: 40 ⁇ m
- an average depth of the grooves of 750 ⁇ m is used. Since the inner diameter of the groove is 292 mm and the outer diameter of the groove is 306 mm, the width of the groove is 7 mm.
- the in-plane temperature range is about 7.5 ° C. at the maximum.
- FIG. 7 shows the temperature distribution in the radial direction of the wafer at the time when the in-plane temperature range is the maximum in FIG. You can see that it is happening. Therefore, a simulation was performed to obtain an appropriate groove depth.
- FIG. 8 is a diagram showing an element model used for the simulation.
- the plate 10 and the wafer 70 are two-dimensional axes
- the plate 10 is divided into partial areas p1 to p13
- the wafer 70 is divided into partial areas w1 to w11.
- the upper surface of the plate 10 has a concave shape (flatness: ⁇ H)
- the wafer 70 has a shape protruding upward (flatness: 80 ⁇ m).
- a value of 80 ⁇ m as the flatness of the wafer 70 is a large value assuming a bad condition.
- the wafer 70 is positioned above the plate 10 (S1), and the wafer 70 is lowered at a speed of 25 mm / s so that the outer periphery of the wafer 70 contacts the protrusions of the plate 10 (S2). Thereafter, the wafer 70 bends at the central portion speed v, whereby the gap between the plate 10 and the wafer 70 is made uniform (S3). At that time, since the air stayed between the plate 10 and the wafer 70 is gradually discharged from the outer peripheral portion of the wafer 70, a time delay occurs until the gap is made uniform. In this simulation, the time delay is represented by a time constant 1.3 s.
- ⁇ AIR is the thermal conductivity of air
- Gap (i) is the gap length in the opposed partial region between the plate 10 and the wafer 70 and changes with time. It is assumed that the heater provided on the lower surface of the plate 10 has a constant output without feedback control.
- FIG. 9 is a diagram showing a first simulation result.
- the flatness ⁇ H of the plate is 40 ⁇ m
- the inner diameter of the groove is 292 mm
- the outer diameter of the groove is 306 mm
- the depth of the groove is 750 ⁇ m.
- the change of the in-plane temperature range is slightly different, but the maximum value of the in-plane temperature range is about 8.3 ° C., which is about 7.6 ° C. of the experimental results. Close values were obtained.
- the depth and size of the grooves formed in the plate were examined.
- the gap length between the plate and the wafer was 100 ⁇ m (value after the gap was uniformized) and the target temperature was 140 ° C.
- the following were set as targets.
- the time difference until the average temperature of the wafer reaches 120 ° C. is smaller than 0.5 seconds as compared to the time when the groove is not formed on the plate.
- the increase in the maximum value of the in-plane temperature range is smaller than 1 ° C. when the wafer positional deviation is ⁇ 2 mm.
- the effect of reducing the maximum value of the in-plane temperature range is 2 with respect to the plate having the same shape and the same flatness and no grooves. Must be above °C.
- FIG. 10 is a diagram showing a second simulation result.
- the flatness ⁇ H of the plate is 40 ⁇ m
- the inner diameter of the groove is 292 mm
- the outer diameter of the groove is 306 mm
- the depth of the groove is 100 ⁇ m.
- the maximum value of the in-plane temperature range is lowered to about 7.3 ° C.
- the reduction effect of the maximum value of the in-plane temperature range exceeds the target and is 3 ° C. or more.
- a similar simulation was performed for the case where the groove depths were 150 ⁇ m and 200 ⁇ m, and the groove depth of 200 ⁇ m was the boundary that satisfied the condition (2).
- FIG. 11 is a diagram showing a modification of the groove shape of the plate according to the embodiment of the present invention.
- FIG. 11A shows the plate 10 in which the groove 10a having the rectangular cross-sectional shape as described above is formed.
- FIG. 11B shows the plate 10 in which the grooves 10b are formed by inclining the inner and outer peripheral walls of the grooves. In order to suppress the contamination of the wafer due to the groove, it is desirable to taper the groove with a shallow groove.
- FIG. 11C shows the plate 10 in which the groove 10c having a curved surface at least part of the groove wall is formed. In (b) and (c) of FIG. 11, when defining the diameter of the inner periphery or outer periphery of the groove, the average value is used.
- FIG. 11 (d) shows the plate 10 in which a groove (stepped portion) 10d extending to the edge of the plate 10 is formed.
- FIG. 11E shows the plate 10 in which a groove 10e having a taper is formed as a whole so that temperature range fluctuations due to wafer displacement can be reduced.
- FIG. 11 (f) shows a case where a plurality of narrow grooves 10f are formed in order to increase the heat transfer area so that the temperature range in the steady state can be reduced when the temperature range in the steady state is increased by the grooves.
- the formed plate 10 is shown.
- the present invention can be used in a substrate temperature control apparatus that controls the temperature of a substrate when processing a substrate such as a semiconductor wafer or a liquid crystal panel.
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Abstract
Description
図1は、本発明の一実施形態に係る基板温度制御装置用ステージを示す平面図であり、図2は、図1に示す一点鎖線II-IIにおける断面図である。基板温度制御装置は、半導体ウエハや液晶パネル等の基板の処理工程において基板の温度を制御する装置であり、基板を載置するために用いられるステージ1を有している。以下においては、直径300mmの半導体ウエハがステージ1上に載置される場合について説明する。
プレート10は、薄いアルミニウム材(A5052)で作製されており、厚さが6mm、長い直径が340mm、短い直径が330mmの円錐台の形状を有している。熱変形を防止するために、ヒータ20が接着される部分を除いてプレート10にアルマイト処理を施すことにより、15μm~30μmのアルマイト層を形成しても良い。
λEQ(i)=λAIR/Gap(i) (i=1、2、・・・、11)
ここで、λAIRは空気の熱伝導率であり、Gap(i)はプレート10とウエハ70との間の対向する部分領域におけるギャップ長であり、時間的に変化する。なお、プレート10の下面に設けられているヒータは、フィードバック制御なしの一定出力であるものとする。
(1)ウエハの平均温度が120℃に到達するまでの時間について、プレートに溝が形成されていない場合における時間と比較して、その時間差が0.5秒よりも小さいこと。
(2)ウエハの位置ずれが±2mmである場合に、面内温度レンジの最大値の増加が1℃よりも小さいこと。
(3)上記の条件(1)及び(2)を満足する範囲内で、同じ形状及び同じ平坦度で溝が形成されていないプレートに対して、面内温度レンジの最大値の低減効果を2℃以上にすること。
Claims (7)
- 基板の温度を制御する基板温度制御装置において所定の直径を有する基板を所定の位置に載置するために用いられるステージであって、
前記基板に対向する第1の面において、前記基板の端縁に対応する位置を含む領域に中心部よりも低い段差部が形成されたプレートと、
前記プレートの第1の面と反対側の第2の面に配置された温調部と、
を具備する基板温度制御装置用ステージ。 - 前記段差部が、前記プレートの第1の面において、前記基板の端縁に対応する位置から測って前記プレートの中心方向に4mm~30mmの距離まで延在する、請求項1記載の基板温度制御装置用ステージ。
- 基板の温度を制御する基板温度制御装置において所定の直径を有する基板を所定の位置に載置するために用いられるステージであって、
前記基板に対向する第1の面において、前記基板の下面を支持する複数の突起と、前記基板の端縁の位置を規制する複数のガイド部材とが設けられたプレートであって、前記複数の突起よりも外周側で前記複数のガイド部材よりも内周側に段差部が形成されている前記プレートと、
前記プレートの第1の面と反対側の第2の面に配置された温調部と、
を具備する基板温度制御装置用ステージ。 - 基板の温度を制御する基板温度制御装置において所定の直径を有する基板を所定の位置に載置するために用いられるステージであって、
前記基板に対向する第1の面において、前記基板の下面を支持する複数の突起と、前記基板の端縁の位置を規制する複数のガイド部材とが設けられたプレートであって、前記複数のガイド部材よりも内周側に段差部が形成され、前記段差部が形成された範囲に少なくとも1つの突起がかかるように前記複数の突起が配置されている前記プレートと、
前記プレートの第1の面と反対側の第2の面に配置された温調部と、
を具備する基板温度制御装置用ステージ。 - 前記段差部が、前記プレートの第1の面において、前記基板の端縁に対応する位置を含む領域に深さ20μm~200μmで形成されている、請求項1~4のいずれか1項記載の基板温度制御装置用ステージ。
- 前記プレートの第1の面が、室温で凹型の形状を有する、請求項1~5のいずれか1項記載の基板温度制御装置用ステージ。
- 前記温調部が、面状のヒータを含む、請求項1~6のいずれか1項記載の基板温度制御装置用ステージ。
Priority Applications (2)
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US12/747,291 US20100271603A1 (en) | 2008-01-18 | 2008-12-15 | Stage for substrate temperature control apparatus |
CN2008801242937A CN101911248B (zh) | 2008-01-18 | 2008-12-15 | 基板温度控制装置用载置台 |
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JP2008008656A JP5368708B2 (ja) | 2008-01-18 | 2008-01-18 | 基板温度制御装置用ステージ |
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JP (1) | JP5368708B2 (ja) |
KR (1) | KR101117534B1 (ja) |
CN (1) | CN101911248B (ja) |
TW (1) | TW200949974A (ja) |
WO (1) | WO2009090816A1 (ja) |
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JP2016207595A (ja) * | 2015-04-28 | 2016-12-08 | 日本特殊陶業株式会社 | 加熱装置 |
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JP2011100065A (ja) * | 2009-11-09 | 2011-05-19 | Shin-Etsu Chemical Co Ltd | ペリクル膜の製造方法および装置 |
JP2011158814A (ja) * | 2010-02-03 | 2011-08-18 | Shin-Etsu Chemical Co Ltd | ペリクル膜の製造方法および装置 |
US9099514B2 (en) | 2012-03-21 | 2015-08-04 | Taiwan Semiconductor Manufacturing Company, Ltd. | Wafer holder with tapered region |
US8519450B1 (en) | 2012-08-17 | 2013-08-27 | International Business Machines Corporation | Graphene-based non-volatile memory |
US9633875B2 (en) * | 2015-03-13 | 2017-04-25 | Varian Semiconductor Equipment Associates, Inc. | Apparatus for improving temperature uniformity of a workpiece |
CN106319483A (zh) * | 2015-06-17 | 2017-01-11 | 英属开曼群岛商精曜有限公司 | 加热装置 |
US10499461B2 (en) * | 2015-12-21 | 2019-12-03 | Intel Corporation | Thermal head with a thermal barrier for integrated circuit die processing |
KR102329513B1 (ko) * | 2016-05-10 | 2021-11-23 | 램 리써치 코포레이션 | 적층된 히터와 히터 전압 입력부들 사이의 연결부들 |
US10619793B2 (en) * | 2018-04-06 | 2020-04-14 | John Ostgaard | Oil conditioner for removing fluid impurities |
JP7030006B2 (ja) * | 2018-04-12 | 2022-03-04 | 株式会社ディスコ | 拡張方法及び拡張装置 |
CN110484897B (zh) * | 2018-05-14 | 2021-10-15 | 北京北方华创微电子装备有限公司 | 晶片用调温装置及半导体设备 |
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US20100271603A1 (en) | 2010-10-28 |
KR20100053614A (ko) | 2010-05-20 |
TW200949974A (en) | 2009-12-01 |
CN101911248B (zh) | 2012-06-27 |
KR101117534B1 (ko) | 2012-03-07 |
JP2009170739A (ja) | 2009-07-30 |
JP5368708B2 (ja) | 2013-12-18 |
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