WO2019181605A1 - 加熱処理装置及び加熱処理方法 - Google Patents
加熱処理装置及び加熱処理方法 Download PDFInfo
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- WO2019181605A1 WO2019181605A1 PCT/JP2019/009664 JP2019009664W WO2019181605A1 WO 2019181605 A1 WO2019181605 A1 WO 2019181605A1 JP 2019009664 W JP2019009664 W JP 2019009664W WO 2019181605 A1 WO2019181605 A1 WO 2019181605A1
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- heat treatment
- substrate
- treatment space
- wafer
- exhaust
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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
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/16—Coating processes; Apparatus therefor
- G03F7/168—Finishing the coated layer, e.g. drying, baking, soaking
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
- G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
- G03F7/26—Processing photosensitive materials; Apparatus therefor
- G03F7/38—Treatment before imagewise removal, e.g. prebaking
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
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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
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
- H01L21/0271—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers
- H01L21/0273—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34 comprising organic layers characterised by the treatment of photoresist layers
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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
- H01L21/67017—Apparatus for fluid treatment
Definitions
- the present invention relates to a heat treatment apparatus and a heat treatment method.
- a substrate on which a coating film such as a resist film is formed for example, a semiconductor wafer (in the following description, simply referred to as a wafer)
- a heat treatment is performed on the semiconductor wafer.
- Such heat treatment has been conventionally performed using a heat treatment apparatus.
- heating since it affects the uniformity of the film thickness, it is necessary to pay attention to airflow control and exhaust control in the heat treatment container.
- the exhaust treatment in the heat treatment container is performed only from the exhaust port provided above the central portion of the wafer, the film of the coating film applied on the wafer due to the influence of the exhaust flow formed in the treatment container
- the central portion is thicker than the outer peripheral portion.
- Patent Document 1 when the wafer is heated to advance the crosslinking reaction, the central exhaust port exhausts with a small exhaust flow rate, and the outer peripheral exhaust port exhausts with a large flow rate.
- the exhaust flow in the heat treatment container, particularly in the center of the wafer is controlled, the film swell at the center of the wafer is suppressed, and the film thickness of the coating film formed on the wafer is good in-plane uniformity. Sex can be secured.
- in-plane uniformity of the film thickness can be improved as a whole, but treatment is performed from both the central exhaust port and the outer peripheral exhaust port during the heat treatment.
- an exhaust flow toward both the exhaust ports is generated in the processing container.
- the film thickness at the central part and the peripheral part of the coating film may be thicker than the film thickness of other parts. That is, there is room for further improvement in the in-plane uniformity of the film thickness on the wafer.
- One embodiment of the present invention has been made in view of such a point, and further improves the in-plane uniformity of the thickness of the coating film on the substrate when the substrate is heat-treated.
- One embodiment of the present invention is a heat treatment apparatus that heat-treats a coating film formed on a substrate, for heating a placement portion on which the substrate is placed and a substrate placed on the placement portion.
- a heating part a ring body provided so as to surround the outer periphery of the mounting part, and a lid that covers the mounting part and that forms a heat treatment space by abutting or approaching the lower surface thereof with the ring body
- a body a central exhaust part that is disposed at the center of the lid and exhausts the heat treatment space, and a control unit that controls the heat treatment of the substrate placed on the placement part.
- the control unit heats the substrate without exhausting the heat treatment space when the heat treatment space is formed and the substrate is present in the heat treatment space.
- operating the central exhaust unit to exhaust the heat treatment space while Controlling to perform the second heat treatment step of performing heating.
- exhaust in the heat treatment space formed by the contact and proximity of the lid and the ring body is not performed in the first heat treatment step.
- a second heat treatment step is performed in which the central exhaust section is operated to heat the substrate while exhausting the heat treatment space. Therefore, the influence of the exhaust flow on the film thickness is reduced, and the in-plane uniformity of the coating film can be improved.
- proximity means here the state in which the magnitude
- Another embodiment of the present invention is a heat treatment method for heat-treating a coating film formed on a substrate, in a state where the substrate is placed on a placement portion having a heating function. Forming a heat treatment space for accommodating the substrate, and heating the substrate without exhausting the heat treatment space in a state where the substrate is present in the heat treatment space; And a second heat treatment step for heating the substrate while evacuating the heat treatment space from above the central portion of the heat treatment space.
- the in-plane uniformity of the film thickness of the coating film on the substrate can be improved as compared with the prior art.
- FIG. 1 is a plan view schematically showing the outline of the configuration of the substrate processing system 1.
- 2 and 3 are a front view and a rear view schematically showing the internal configuration of the substrate processing system 1, respectively.
- a predetermined process is performed on the wafer W as a substrate to be processed.
- the substrate processing system 1 includes a cassette station 10 in which a cassette C containing a plurality of wafers W is loaded and unloaded, and a processing station 11 having a plurality of processing apparatuses that perform predetermined processing on the wafers W. And an interface station 13 that transfers the wafer W to and from the exposure apparatus 12 adjacent to the processing station 11 is integrally connected.
- the cassette station 10 is provided with a cassette mounting table 20.
- the cassette mounting table 20 is provided with a plurality of cassette mounting plates 21 on which the cassette C is mounted when the cassette C is carried into and out of the substrate processing system.
- the cassette station 10 is provided with a wafer transfer device 23 that is movable on a transfer path 22 extending in the X direction as shown in FIG.
- the wafer transfer device 23 is also movable in the vertical direction and the vertical axis direction ( ⁇ direction), and includes a cassette C on each cassette mounting plate 21 and a delivery device for a third block G3 of the processing station 11 described later.
- the wafer W can be transferred between the two.
- the processing station 11 is provided with a plurality of, for example, four blocks having various devices, that is, a first block G1 to a fourth block G4.
- a second block G2 is provided on the back side of the processing station 11 (X-direction positive direction side in FIG. 1, upper side in the drawing).
- the third block G3 described above is provided on the cassette station 10 side (the Y direction negative direction side in FIG. 1) of the processing station 11, and the processing station 11 interface station 13 side (the Y direction positive direction in FIG. 1). Side) is provided with a fourth block G4.
- a plurality of liquid processing apparatuses for example, a developing processing apparatus 30 for developing the wafer W, an antireflection film (hereinafter referred to as “lower antireflection coating” below the processing film of the wafer W, A lower antireflection film forming device 31 for forming a film ”, a resist coating device 32 as a processing liquid coating device for applying a resist to the wafer W to form a processing film, and an antireflection film on the processing film of the wafer W.
- An upper antireflection film forming apparatus 33 for forming (hereinafter referred to as “upper antireflection film”) is arranged in this order from the bottom.
- the development processing device 30, the lower antireflection film forming device 31, the resist coating device 32, and the upper antireflection film forming device 33 are arranged side by side in the horizontal direction.
- the number and arrangement of the development processing device 30, the lower antireflection film forming device 31, the resist coating device 32, and the upper antireflection film forming device 33 can be arbitrarily selected.
- the lower antireflection film forming device 31 for example, spin coating for applying a predetermined processing solution onto the wafer W is performed.
- spin coating for example, the processing liquid is discharged onto the wafer W from an application nozzle, and the wafer W is rotated to diffuse the processing liquid to the surface of the wafer W.
- the heat treatment apparatus 40 according to the embodiment for performing the heat treatment of the wafer W, or the hydrophobic treatment for improving the fixability between the resist solution and the wafer W is performed.
- a hydrophobic treatment apparatus 41 to be performed and a peripheral exposure apparatus 42 for exposing the outer peripheral portion of the wafer W are provided side by side in the vertical direction and the horizontal direction.
- the number and arrangement of the heat treatment apparatus 40, the hydrophobic treatment apparatus 41, and the peripheral exposure apparatus 42 can be arbitrarily selected.
- a plurality of delivery devices 50, 51, 52, 53, 54, 55, 56 are provided in order from the bottom.
- the fourth block G4 is provided with a plurality of delivery devices 60, 61, 62 in order from the bottom.
- a wafer transfer area E is formed in an area surrounded by the first block G1 to the fourth block G4.
- a plurality of wafer transfer devices 70 having transfer arms 70a that are movable in the Y direction, the X direction, the ⁇ direction, and the vertical direction are arranged.
- the wafer transfer device 70 moves in the wafer transfer area E, and transfers the wafer W to a predetermined device in the surrounding first block G1, second block G2, third block G3, and fourth block G4. it can.
- the wafer transfer area E is provided with a shuttle transfer device 80 that transfers the wafer W linearly between the third block G3 and the fourth block G4.
- the shuttle transport device 80 is linearly movable, for example, in the Y direction in FIG.
- the shuttle transfer device 80 moves in the Y direction while supporting the wafer W, and can transfer the wafer W between the transfer device 52 of the third block G3 and the transfer device 62 of the fourth block G4.
- a wafer transfer device 81 is provided next to the third block G3 on the positive side in the X direction.
- the wafer transfer device 81 has, for example, a transfer arm 81a that is movable in the X direction, the ⁇ direction, and the vertical direction.
- the wafer transfer device 81 can move up and down while supporting the wafer W by the transfer arm 81a, and can transfer the wafer W to each delivery device in the third block G3.
- the interface station 13 is provided with a wafer transfer device 90 and delivery devices 91 and 92.
- the wafer transfer device 90 includes a transfer arm 90a that is movable in the Y direction, the ⁇ direction, and the vertical direction, for example.
- the wafer transfer device 90 can support the wafer W on the transfer arm 90a and transfer the wafer W between each transfer device, the transfer devices 91 and 92, and the exposure device 12 in the fourth block G4.
- the control unit 100 is, for example, a computer and has a program storage unit (not shown).
- the program storage unit stores a program for controlling the processing of the wafer W in the substrate processing system 1.
- the program is recorded on a computer-readable storage medium such as a computer-readable hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnetic optical disk (MO), or a memory card. Or installed in the control unit 100 from the storage medium.
- a computer-readable storage medium such as a computer-readable hard disk (HD), a flexible disk (FD), a compact disk (CD), a magnetic optical disk (MO), or a memory card.
- a cassette C containing a plurality of wafers W is loaded into the cassette station 10 of the substrate processing system 1 and placed on the cassette placing plate 21.
- the wafers W in the cassette C are sequentially taken out by the wafer transfer device 23 and transferred to the transfer device 53 of the third block G3 of the processing station 11.
- the wafer W transferred to the delivery device 53 is transferred to the heat treatment device 40 of the second block G2 by the wafer transfer device 70 and subjected to temperature adjustment processing. Subsequently, the wafer W is transferred to, for example, the lower antireflection film forming device 31 of the first block G1 by the wafer transfer device 70, and a lower antireflection film is formed on the wafer W. Thereafter, the wafer W is transferred to the heat treatment apparatus 40 of the second block G2, where heat treatment is performed, and the wafer W is returned to the delivery apparatus 53 of the third block G3.
- the wafer W returned to the delivery device 53 is transferred by the wafer transfer device 81 to the transfer device 54 of the same third block G3. Subsequently, the wafer W is transferred by the wafer transfer apparatus 70 to the hydrophobizing apparatus 41 of the second block G2, and subjected to the hydrophobizing process.
- the wafer W that has been subjected to the hydrophobic treatment is transferred to the resist coating device 32 by the wafer transfer device 70, and a resist film is formed on the wafer W. Thereafter, the wafer W is transferred to the heat treatment apparatus 40 by the wafer transfer apparatus 70, pre-baked, and transferred to the delivery apparatus 55 of the third block G3.
- the wafer W transferred to the transfer device 55 of the third block G3 is transferred to the upper antireflection film forming device 33 by the wafer transfer device 70, and an upper antireflection film is formed on the wafer W. Thereafter, the wafer W is transferred to the heat treatment apparatus 40 by the wafer transfer apparatus 70 and heated, and then the temperature is adjusted. After the temperature adjustment, the wafer W is transferred to the peripheral exposure device 42 and subjected to peripheral exposure processing.
- the wafer W is transferred by the wafer transfer device 70 to the delivery device 56 of the third block G3.
- the wafer W transferred to the transfer device 56 of the third block G3 is transferred to the transfer device 52 by the wafer transfer device 81 and transferred to the transfer device 62 of the fourth block G4 by the shuttle transfer device 80.
- the wafer W transferred to the delivery device 62 is transferred to the exposure device 12 by the wafer transfer device 90 of the interface station 13 and is subjected to exposure processing in a predetermined pattern.
- the wafer W that has been subjected to the exposure process is transferred by the wafer transfer device 90 to the delivery device 60 of the fourth block G4. Thereafter, the wafer is transferred to the heat treatment apparatus 40 by the wafer transfer apparatus 70, and post-exposure baking is performed.
- the wafer W is transferred to the development processing apparatus 30 by the wafer transfer apparatus 70 and developed. After the development is completed, the wafer W is transferred to the heat treatment apparatus 40 by the wafer transfer apparatus 70 and subjected to a post-bake process.
- the wafer W is transferred to the delivery device 50 of the third block G3 by the wafer transfer device 70, and is transferred to the cassette C of the predetermined cassette mounting plate 21 by the wafer transfer device 23 of the cassette station 10.
- a series of photolithography steps is completed.
- FIG. 4 is a side cross-sectional view schematically showing an outline of the configuration of the heat treatment apparatus 40.
- the heat treatment apparatus 40 faces the mounting unit 200 on which the wafer W is mounted, the ring body 210 provided so as to surround the outer periphery of the mounting unit 200, and the mounting unit 200.
- a lid body 220 is provided which forms a heat treatment space S by contacting the ring body 210 and covering the mounting portion 200.
- the mounting unit 200 includes a hot plate 201 on which the wafer W is directly mounted, and the hot plate 201 is supported by a hot plate support unit 202.
- the hot plate support 202 is supported by a base 204 that forms the bottom of the heat treatment apparatus 40 via a plurality of support columns 203.
- a heater 205 as a heating unit is provided inside the hot plate 201.
- the base 204 is provided with a support pin lifting mechanism 206, and the support pin 207 can be moved up and down. As a result, the support pins 207 can protrude upward from the hot plate 201, and the wafer W can be transferred to and from the transfer arm 70a of the wafer transfer apparatus 70 described above.
- the ring body 210 is movable up and down by a ring body elevating mechanism 211. And in the state which the ring body 210 was lifted up most, it arrange
- the lid 220 has a top plate 220 a that forms the ceiling surface of the heat treatment space S facing the heat plate 201, and a hanging portion 220 b that forms the side wall of the heat treatment space S.
- the lid body 220 is configured to be movable up and down by a lid body elevating mechanism (not shown), and the lower surface 220c of the drooping portion 220b and the upper surface of the ring body 210 are lowered by lowering the lid body 220 by the lid body elevating mechanism.
- 210a is contact
- a gap D can be formed between the upper surface 210a.
- a central exhaust part 221 for exhausting the heat treatment space S is provided in the center of the top plate 220a, that is, above the center part of the wafer W placed on the hot plate 201.
- the central exhaust unit 221 communicates with, for example, an exhaust device 222 provided outside the heat treatment apparatus 40 and can exhaust the atmosphere in the heat treatment space S.
- An annular outer extension 225 is provided on the outer periphery of the lid 220.
- the outer extending portion 225 includes an extending portion 225a and a hanging portion 225b, and an annular opening 225c that opens to the lower surface side is formed between the hanging portion 225b and the outside of the hanging portion 220b of the lid body 220. Is formed.
- the opening 225c communicates with an exhaust part (not shown) and constitutes the outer peripheral exhaust part 230 of the present invention.
- the height position of the lower end surface 225d of the hanging part 225b of the outer extension 225 is set higher than the lower surface 220c of the hanging part 220b of the lid 220. Therefore, when the heat treatment space S is formed by the lid body 220 coming into contact with the ring body 210, the lower end surface 225 d of the drooping portion 225 b of the outer extension portion 225 is connected to the upper surface 210 a of the ring body 210 or an outer exhaust described later.
- a gap D2 is formed as shown in FIGS. 5 and 6 without coming into contact with the upper surface of the portion 240.
- an outer exhaust part 240 for exhausting the atmosphere leaking to the outside of the heat treatment space S is provided outside the outer periphery of the ring body 210.
- the outer exhaust unit 240 communicates with an exhaust device 241 provided outside the heat treatment device 40, for example.
- the heat treatment apparatus 40 has the above-described configuration. Next, a heat treatment method using the heat treatment apparatus 40 will be described. 7 and 8 are explanatory views schematically showing the operation of the heat treatment apparatus 40 in a series of heat treatment steps, and FIG. 9 is a diagram showing a change in substrate temperature over time during the heat treatment by the heat treatment apparatus 40, various exhausts, and rings A timing chart of the operation of the body 210 is shown. In FIG. 9, the horizontal axis indicates 0 when the first heat treatment step described later is started.
- the atmosphere in the heat treatment apparatus 40 is stabilized by operating the exhaust device 222, the exhaust device 241, and the outer exhaust unit to perform exhaust from the central exhaust unit 221, the outer peripheral exhaust unit 230, and the outer exhaust unit 240.
- the lid 220 is raised as shown in FIG.
- the wafer W to be heated is transferred onto the hot plate 201 of the mounting unit 200 and mounted on the support pins 207 by the transfer arm 70a of the wafer transfer device 70 of the substrate processing system 1.
- the transfer arm 70 a is retracted out of the heat treatment apparatus 40, the support pins 207 are then lowered, and the wafer W is placed on the hot plate 201.
- the lid body 220 is lowered by a lid body lifting mechanism (not shown), whereby the upper surface 210a of the ring body 210 and the lower surface 220c of the drooping portion 220b of the lid body 220. And a heat treatment space S is formed (preparation step).
- the gap between the upper surface 210a of the ring body 210 and the lower surface 220c of the drooping portion 220b of the lid body 220 is not substantially exhausted, for example, exceeding 0 mm, A gap of 1 mm or less, for example, 0.5 mm may be formed.
- the operation of the exhaust device 222 is stopped, the exhaust from the central exhaust unit 221 is stopped, and the wafer W mounted on the hot plate 201 of the mounting unit 200 is stopped.
- the first heat treatment by the heater 205 is started (first heat treatment step).
- exhaust from the central exhaust unit 221 is not performed. That is, the exhaust from the central exhaust unit 221 is not performed until the temperature of the wafer W reaches the crosslinking temperature of the coating film applied on the wafer W.
- the exhaust from the outer exhaust part 230 and the outer exhaust part 240 may be continued from the preparation process to the second heat treatment process as well as in the first heat treatment process.
- the outer exhaust part 230 and the outer exhaust part 240 are formed outside the heat treatment space S, so that no airflow is formed in the process space and the film thickness on the wafer W is increased. There is no impact.
- the outer periphery exhaust part 230 can guide effectively by the outer periphery exhaust part 230, and can thereby form an air curtain appropriately.
- the outer extending portion 225 is formed on the outer periphery of the lid body 220 and the outer peripheral exhaust portion 230 is formed between the lid body 220.
- Another cover body may be provided, and the outer peripheral exhaust part 230 may be formed between both the cover bodies that move up and down integrally.
- the exhaust from the central exhaust unit 221 is resumed. Thereby, for example, even if impurities such as sublimates are generated during the heat treatment of the wafer W, it can be exhausted.
- the exhaust flow toward the central exhaust unit 221 does not affect the film thickness of the coating film.
- the ring body elevating mechanism 211 when starting exhaust of the atmosphere of the heat treatment space S by the central exhaust part 221, that is, when starting the second heat treatment step, the ring body elevating mechanism 211 is used.
- the ring body 210 may be lowered to form a gap D between the upper surface 210a of the ring body 210 and the lower surface 220c of the hanging portion 220b of the lid body 220.
- the gap D functions as an exhaust passage from the lower periphery of the heat treatment space S, and exhaust treatment in the heat treatment space S is performed not only from the central exhaust portion 221 but also from the outer exhaust portion 230 and the outer exhaust portion 240. Since it can carry out simultaneously from the peripheral part of the heat treatment space S, the impurity recovery efficiency can be increased.
- the atmosphere is simultaneously exhausted from the outer exhaust part 240 arranged outside the outer periphery of the ring body 210 in addition to the central exhaust part 221 and the outer peripheral exhaust part 230, even if heat treatment is performed. Even when the amount of impurities leaked from the space S is large and cannot be recovered by the outer peripheral exhaust part 230, it is possible to appropriately contribute to recovery of these impurities and the like.
- the ring body 210 is raised, and then the lid body 220 is lifted by the lid body lifting mechanism, and the support pins 207 raise the wafer W. Thereafter, the wafer W that has been subjected to the heat treatment by the transfer arm 70 a of the wafer transfer apparatus 70 is carried out of the heat treatment apparatus 40.
- the restart timing of exhaust of the central exhaust unit 221, that is, the timing of starting the second heat treatment process is controlled by the wafer temperature, but the timing of starting the second heat treatment process depends on the temperature. It does not have to be determined.
- the inside of the heat treatment space S can be monitored by a camera or the like, and it may be controlled according to the finished state of the coating film, or the material and other conditions of the coating film are stored in the control unit 100 in advance and set.
- the reaction rate of the membrane may be calculated according to the conditions, and may be controlled by the time calculated by such calculation.
- the ring body 210 is lowered in the second heat treatment step, and the exhaust of the atmosphere in the heat treatment space S by the outer exhaust part 230 and the outer exhaust part 240 is started.
- the ring body 210 is also lowered in the first heat treatment step to form the gap D. It may be controlled as appropriate. However, in such a case, it is necessary to control the width of the gap D so that no airflow is generated in the heat treatment space S.
- the gap D in the first heat treatment step, it is possible to prevent the heat treatment space S from being filled with excessive impurities, and the generated impurities are reattached on the wafer W. Can be prevented.
- the exhaust from the outer exhaust part 230 and the outer exhaust part 240 is always operated during the heat treatment, but the substrate temperature reaches the crosslinking temperature of the coating film as in the central exhaust part 221.
- the exhaust air from the outside It is possible to prevent the atmosphere in the heat treatment space S from leaking out from the clearance, thereby forming an exhaust flow in the heat treatment space S and affecting the uniformity of the uniform film.
- the present invention is useful when heating a substrate.
- Substrate processing system 40 Heat processing apparatus 100 Control part 200 Mounting part 201 Hot plate 202 Hot plate support part 210 Ring body 211 Ring body raising / lowering mechanism 220 Cover body 220a Top plate 220b Hanging part 220c Lower surface 221 Central exhaust part 230 Outer periphery exhaust part 240 Outer exhaust part 222, 241 Exhaust device W Wafer
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Abstract
Description
本願は、2018年3月23日に日本国に出願された特願2018-56754号に基づき、優先権を主張し、その内容をここに援用する。
なおここで近接とは、例えば隙間の大きさが、0mmを超えて1mm以下までの大きさの隙間が蓋体とリング体との間に存在している状態をいう。
まず、本実施の形態にかかる加熱処理装置を備えた基板処理システムの構成について説明する。図1は、基板処理システム1の構成の概略を模式的に示す平面図である。図2及び図3は、各々基板処理システム1の内部構成を模式的に示す正面図と背面図である。基板処理システム1では、被処理基板としてのウェハWに所定の処理を行う。
次に、以上のように構成された基板処理システム1を用いて行われるウェハ処理について説明する。
次に、本発明の実施の形態にかかる加熱処理装置40の構成について図4を参照して説明する。
実施の形態にかかる加熱処理装置40は以上の構成を有しており、次に加熱処理装置40を用いた加熱処理方法について説明する。図7、図8は一連の加熱処理工程による加熱処理装置40の動作を模式的に表した説明図、図9は加熱処理装置40による加熱処理中における基板温度の経時変化と、各種排気、リング体210の動作のタイミングチャートを示している。なお、図9においては、後述の第1の加熱処理工程を開始した時点を横軸の0としている。
なお前記した例では、蓋体220の外周に外側延出部225を形成して、蓋体220との間に外周排気部230を形成したが、これに代えて蓋体220の該左側に別途他の蓋体を設け、一体的に上下動する双方の蓋体の間に外周排気部230を形成するようにしてもよい。
40 加熱処理装置
100 制御部
200 載置部
201 熱板
202 熱板支持部
210 リング体
211 リング体昇降機構
220 蓋体
220a 天板
220b 垂下部
220c 下面
221 中央排気部
230 外周排気部
240 外側排気部
222、241 排気装置
W ウェハ
Claims (9)
- 基板に形成された塗布膜を加熱処理する加熱処理装置であって、
基板を載置する載置部と、
前記載置部に載置された基板を加熱するための加熱部と、
前記載置部の外周を囲うように設けられたリング体と、
前記載置部を覆い、かつその下面が前記リング体と当接または近接することで加熱処理空間を形成する蓋体と、
前記蓋体の中央部に配置され、前記加熱処理空間内を排気する中央排気部と、
前記載置部に載置された基板の加熱処理の制御を行う制御部と、を有し、
前記制御部は、
前記加熱処理空間が形成されてかつ前記加熱処理空間内に前記基板が在る状態にて前記加熱処理空間内を排気しないで前記基板の加熱を行なう第1の加熱処理工程と、前記中央排気部を作動させて前記加熱処理空間内を排気しつつ前記基板の加熱を行なう第2の加熱処理工程を行なうように制御する。 - 請求項1に記載の加熱処理装置において、
前記加熱処理空間を形成する蓋体は、前記リング体と蓋体との当接または近接部分の外側に外周排気部を有する。 - 請求項2に記載の加熱処理装置において、
前記外周排気部は、前記蓋体の下面側に全周に亘って開口した環状の形状を有する。 - 請求項2に記載の加熱処理装置において、
前記外周排気部は、前記第2の加熱処理工程において作動する。 - 請求項4に記載の加熱処理装置において、
前記リング体は上下動自在であって、前記外周排気部が作動するときには、前記リング体が下降して、前記リング体と前記蓋体の下面と前記リング体の上面との間に前記近接時の隙間よりも広い隙間が形成される。 - 請求項1に記載の加熱処理装置において、
前記リング体の外周外側に設けられ、前記加熱処理空間の外に漏洩した雰囲気を排気するための外側排気部を有する。 - 請求項6に記載の加熱処理装置において、
前記外側排気部は、前記載置部に載置された基板の温度に関わらず、少なくとも前記基板を加熱している間は作動している。 - 基板に形成された塗布膜を加熱処理する加熱処理方法であって、
加熱機能を有する載置部に基板を載置した状態で、当該載置部及び基板を収容する加熱処理空間を形成し、
前記加熱処理空間が形成されてかつ前記加熱処理空間内に前記基板が在る状態にて前記加熱処理空間内を排気しないで前記基板の加熱を行なう第1の加熱処理工程と、
少なくとも前記加熱処理空間の中央部の上方から、前記加熱処理空間内を排気しつつ前記基板の加熱を行なう第2の加熱処理工程と、
を有する。 - 請求項8に記載の加熱処理方法において、
前記第2の加熱処理工程において、前記加熱処理空間内の周縁部からも前記加熱処理空間内を排気して排気量を増加させる。
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