WO2020115962A1 - 成膜装置及び成膜方法 - Google Patents
成膜装置及び成膜方法 Download PDFInfo
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- WO2020115962A1 WO2020115962A1 PCT/JP2019/034003 JP2019034003W WO2020115962A1 WO 2020115962 A1 WO2020115962 A1 WO 2020115962A1 JP 2019034003 W JP2019034003 W JP 2019034003W WO 2020115962 A1 WO2020115962 A1 WO 2020115962A1
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/12—Organic material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C11/00—Component parts, details or accessories not specifically provided for in groups B05C1/00 - B05C9/00
- B05C11/10—Storage, supply or control of liquid or other fluent material; Recovery of excess liquid or other fluent material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C9/00—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
- B05C9/08—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
- B05C9/12—Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation being performed after the application
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D1/00—Processes for applying liquids or other fluent materials
- B05D1/60—Deposition of organic layers from vapour phase
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/06—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation
- B05D3/061—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to radiation using U.V.
- B05D3/065—After-treatment
- B05D3/067—Curing or cross-linking the coating
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/50—Substrate holders
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/58—After-treatment
Definitions
- the present invention relates to a film forming apparatus and a film forming method.
- an energy ray curable resin such as an ultraviolet curable resin to form a resin layer on a substrate
- the following two steps are typically performed. That is, a step of supporting a substrate by a cooling stage and supplying a source gas containing the resin onto the substrate supported by the cooling stage, and irradiating light such as ultraviolet rays onto the substrate to form a cured resin layer on the substrate. And the step of forming.
- a plurality of such steps are not performed in separate vacuum chambers, but a step of supplying a source gas onto the substrate and a step of forming a resin layer cured on the substrate by ultraviolet rays or the like are performed.
- a film forming apparatus that performs the operation in one vacuum chamber (for example, see Patent Document 1).
- the raw material gas is likely to adhere to the cooling stage corresponding to the side part of the substrate (the part beyond the outer peripheral edge of the substrate).
- this source gas is hardened and deposited thickly as a resin layer, a phenomenon occurs in which the substrate rides on the resin layer.
- the cooling effect of the substrate by the cooling stage is reduced, the in-plane temperature distribution of the substrate is not uniform, and a desired film thickness distribution cannot be obtained.
- an object of the present invention is to provide a film forming apparatus and a film forming method capable of forming a resin layer on a substrate with a good film thickness distribution.
- a film forming apparatus includes a cooling stage, a deposition-prevention frame part, a gas supply part, an irradiation source, and a vacuum chamber.
- the cooling stage has a support surface that supports the substrate and a side surface portion that is continuous with the support surface, and the outer peripheral edge of the substrate that is supported by the support surface is configured to protrude from the side surface portion.
- the attachment-prevention frame portion is annular and is arranged so as to surround the side surface portion of the cooling stage, and a recess is provided at a position facing the outer peripheral end of the substrate, and the side surface portion is surrounded by the recess. ..
- the gas supply unit supplies a raw material gas containing an energy ray curable resin toward the support surface.
- the irradiation source faces the supporting surface and irradiates the supporting surface with energy rays that cure the energy ray-curable resin.
- the vacuum chamber houses the cooling stage, the deposition-prevention frame part, the gas supply part, and the irradiation source.
- the deposition-prevention frame is arranged so as to surround the side surface of the cooling stage, the resin layer is less likely to be deposited on the cooling stage. Further, since the deposition-prevention frame portion has a recess at a position facing the outer peripheral edge of the substrate, even if the resin layer is deposited on the deposition-prevention frame portion, the resin layer does not reach the substrate and the substrate is cooled. It's hard to leave the stage. Thereby, the in-plane temperature distribution of the substrate becomes uniform, and the resin layer can be formed on the substrate with a good film thickness distribution.
- a first gap is provided between the side surface portion of the cooling stage and the attachment-prevention frame portion, A second gap is provided between the deposition-inhibitory frame portion and the substrate,
- the cooling stage may be provided with a gas injection mechanism that injects an inert gas from the second gap toward the side wall of the vacuum chamber via the first gap.
- the raw material gas is pushed back from the stage toward the side wall of the vacuum chamber by the inert gas injected from the first gap between the deposition-prevention frame portion and the substrate.
- the resin layer is less likely to be formed in the first gap, and the substrate is more reliably less likely to be separated from the cooling stage.
- the concave portion provided in the attachment-prevention frame portion, Bottom part, A side wall portion that is provided continuously to the bottom surface portion and faces the side surface portion of the cooling stage, It is connected to the bottom surface portion and is constituted by an outer peripheral portion surrounding the bottom surface portion and the side wall portion, A partition part facing the side wall part and surrounding the cooling stage is attached to the concave part, A third gap provided in parallel with the first gap is provided between the partition portion and the side wall portion, A fourth gap is provided between the partition and the substrate, The gas injection mechanism injects the inert gas from the second gap and the fourth gap toward the side wall of the vacuum chamber via the first gap, and also passes through the third gap. The inert gas may be injected from the fourth gap toward the side wall.
- the inert gas is introduced into the third gap as well as the first gap.
- the source gas is less likely to adhere to the side wall portion forming the recess, and the resin layer is less likely to be formed on the side wall portion.
- the substrate is less likely to be separated from the cooling stage.
- the width of the fourth gap may be wider than the width of the second gap.
- the width of the fourth gap is wider than the width of the second gap, even if the resin layer is formed on the partition part, the resin layer is not formed on the substrate. Hard to reach. As a result, the substrate is less likely to be separated from the cooling stage.
- the support surface of the cooling stage is rectangular,
- the gas injection mechanism, A flow rate of the inert gas flowing through the third gap facing the corner of the support surface, and a flow rate of the inert gas flowing through the third gap facing the side of the support surface other than the corner. May be controlled independently.
- the vicinity of the corner and the side can be independently controlled. This makes it possible to uniformly control the thickness of the resin layer deposited in the recesses near the corners and the sides. As a result, the substrate is less likely to be separated from the cooling stage.
- the substrate is formed so that an outer peripheral edge of the substrate projects from the side surface portion on the support surface of a cooling stage having a support surface supporting the substrate and a side surface portion continuous with the support surface. Is supported.
- An annular deposition-inhibitory frame portion surrounding the side surface portion of the cooling stage, wherein a recess is provided at a position facing the outer peripheral end of the substrate, and the side surface portion is surrounded by the recessed portion. are arranged around the cooling stage.
- a source gas containing an energy ray curable resin is supplied toward the substrate.
- a resin layer is formed on the substrate by irradiating the substrate with an energy ray that cures the energy-ray curable resin.
- the deposition-prevention frame portion is arranged so as to surround the side surface portion of the cooling stage, the resin layer is less likely to be deposited on the cooling stage.
- the concave portion is provided in the adhesion preventing frame portion at a position facing the outer peripheral edge of the substrate, even if the resin layer is deposited on the adhesion preventing frame portion, the resin layer does not reach the substrate and the substrate is cooled. It's hard to leave the stage. Thereby, the in-plane temperature distribution of the substrate becomes uniform, and the resin layer can be formed on the substrate with a good film thickness distribution.
- a film forming apparatus and a film forming method capable of forming a resin layer on a substrate with a good film thickness distribution.
- FIG. 1A is a schematic plan view of the first region S1 of FIG. 1 as viewed from above in the vertical direction.
- FIG. 6B is a schematic sectional view taken along the line AA of FIG. It is a schematic diagram showing the effect of this embodiment.
- It is a schematic cross section of the film-forming apparatus concerning the modification 1 of this embodiment.
- It is a typical sectional view of the film deposition system concerning modification 2 of this embodiment.
- XYZ axis coordinates may be introduced into each drawing.
- the X-axis direction and the Y-axis direction indicate directions orthogonal to each other, and these indicate the horizontal direction in the embodiment.
- the Z-axis direction indicates a direction orthogonal to the X-axis direction and the Y-axis direction, and indicates the vertical direction (gravitational direction).
- FIG. 1 is a schematic cross-sectional view of the film forming apparatus according to this embodiment.
- FIG. 2A is a schematic plan view of the first region S1 of FIG. 1 as viewed from above in the vertical direction.
- FIG. 2B is a schematic cross-sectional view taken along the line AA of FIG.
- the film forming apparatus 1 is a film forming apparatus for forming an ultraviolet curable resin layer, which is an energy ray curable resin, on the substrate W.
- the film forming apparatus 1 includes a vacuum chamber 10, a cooling stage 15, an attachment-prevention frame portion 18, a partition wall 16, a gas supply portion 13, an irradiation source 14, and a gas supply line 100.
- the substrate W is, for example, a glass substrate, a semiconductor substrate, or the like, and the planar shape thereof may be rectangular or circular, for example.
- the vacuum tank 10 is a vacuum container in which the upper part is the atmosphere and the lower part can maintain a reduced pressure state.
- the vacuum chamber 10 has a first chamber body 11 and a second chamber body 12 arranged on the first chamber body 11.
- the vacuum chamber 10 accommodates the cooling stage 15, the deposition-prevention frame portion 18, the gas supply portion 13, the irradiation source 14, and the partition wall 16.
- the first chamber body 11 and the second chamber body 12 are partitioned by a partition wall 16.
- the inside of the first chamber body 11 constitutes a first region S1.
- the inside of the second chamber body 12 constitutes the second regions S2, respectively.
- the first region S1 is regulated to a predetermined degree of vacuum by the vacuum exhaust system 19.
- the degree of vacuum during pressure regulation is not particularly limited, but is generally set to 1 ⁇ 10 ⁇ 3 Pa or more and 500 Pa or less.
- the gas supply unit 13 is arranged in the first region S1.
- the second region S2 is maintained in the air atmosphere, for example.
- the irradiation source 14 which is an ultraviolet light source is arranged so as to face the cooling stage 15.
- the outer shape of the vacuum chamber 10 viewed from the Z-axis direction is designed to match the outer shape of the cooling stage 15, for example.
- the outer shape of the vacuum chamber 10 is rectangular. However, this outer shape is not limited to a rectangle.
- the cooling stage 15 is attached to the first chamber body 11 via a sealing mechanism or the like (not shown), and is installed in the first area S1.
- the cooling stage 15 has a substrate support 151 for placing the substrate W.
- the substrate support table 151 is arranged substantially at the center of the first region S1 and has a support surface 151a for supporting the substrate W to be processed.
- the support surface 151a has a rectangular shape in the XY axis plane orthogonal to the Z axis direction, although the shape is not particularly limited.
- the cooling stage 15 has a side surface portion 151w connected to the support surface 151a in addition to the support surface 151a. Further, the cooling stage 15 is configured such that the outer peripheral edge E of the substrate W projects from the side surface portion 151w when the substrate W is supported by the supporting surface 151a. In other words, the area of the support surface 151a is smaller than the area of the substrate W.
- the substrate support 151 has a built-in cooling mechanism (temperature: ⁇ 30° C. or higher and 0° C. or lower) for cooling the substrate W to a predetermined temperature.
- a built-in cooling mechanism temperature: ⁇ 30° C. or higher and 0° C. or lower
- the substrate W is cooled to a predetermined temperature by the cooling stage 15, and the ultraviolet curable resin in the source gas is cooled and condensed on the substrate W.
- the substrate support 151 may be moved up and down in the Z-axis direction by a driving mechanism (not shown). Further, the cooling stage 15 may include a rotation mechanism that rotates the support surface 151a in the XY axis plane.
- the attachment prevention frame portion 18 is arranged so as to surround the side surface portion 151w of the cooling stage 15. That is, the attachment-prevention frame portion 18 is an annular member in the XY axis plane.
- the outer shape of the attachment-prevention frame portion 18 in the XY axis plane is, for example, a rectangle.
- the deposition-prevention frame portion 18 is provided with a recess 181h at a position facing the outer peripheral edge E of the substrate W.
- the recess 181h includes a bottom surface portion 181b, a side wall portion 181w, and an outer peripheral portion 181e.
- the bottom surface portion 181b is a base portion of the recess 181h.
- the side wall portion 181w is a partition portion that is continuously provided on the bottom surface portion 181b and faces the side surface portion 151w of the cooling stage 15.
- the outer peripheral portion 181e is a thick portion that is continuous with the bottom surface portion 181b and surrounds the bottom surface portion 181b and the side wall portion 181w. Since the attachment-prevention frame portion 18 is annular in the XY axis plane, the recess 181h is also annular in the XY axis plane. As a result, the side surface portion 151w of the cooling stage 15 is surrounded by the recess 181h.
- the deposition-prevention frame portion 18 and the side surface portion 151w of the cooling stage 15 are not in close contact with each other, and, for example, a gap is formed between the side surface portion 151w of the cooling stage 15 and the deposition prevention frame portion 18 (side wall portion 181w).
- a first gap C1 having a width of 0.01 mm or more and 0.5 mm or less is provided.
- the deposition-prevention frame portion 18 and the substrate W are not in close contact with each other, and the gap width between the deposition-prevention frame portion 18 (side wall portion 181w) and the substrate W is, for example, 0.01 mm or more and 0.2 mm or less.
- Two gaps C2 are provided.
- the second gap C2 communicates with the first gap C1.
- the second gap C2 is also the difference in height between the side wall portion 181w and the support surface 151a.
- the outer frame member 20 is arranged so as to surround the cooling stage 15 and the deposition-inhibitory frame portion 18. That is, the outer frame member 20 is annular in the XY plane.
- the outer shape of the outer frame member 20 in the XY axis plane is, for example, a rectangle.
- the outer frame member 20 is provided with an exhaust groove 201 surrounding the cooling stage 15 and the deposition-inhibitory frame portion 18.
- the exhaust groove 201 communicates with the first region S1 and sucks the gas existing in the first region S1. Then, the gas existing in the first region S1 is exhausted to the outside of the vacuum chamber 10 by the vacuum exhaust system 19 via the exhaust groove 201.
- the gas supply unit 13 is connected to a gas supply line 100 that generates a raw material gas containing an ultraviolet curable resin.
- the gas supply unit 13 has a plurality of branch piping units 131.
- the gas supply unit 13 may be a shower plate described later.
- the irradiation source 14 irradiates the support surface 151a with ultraviolet rays UV which are energy rays. As a result, the ultraviolet curable resin applied on the substrate W is cured.
- the irradiation source 14 is arranged in the second region S2.
- the reflection plate 17 efficiently collects the ultraviolet rays UV emitted from the irradiation source 14 on the substrate W.
- the partition 16 is located between the first chamber body 11 and the second chamber body 12.
- the partition wall 16 partitions the interior of the vacuum chamber 10 and has a plate-like structure including an XY axis plane orthogonal to the Z axis direction.
- the partition 16 has a transmissive portion 161 that transmits ultraviolet UV.
- the transmissive portion 161 may be the entire partition 16 or a part thereof.
- the transmissive part 161 is composed of, for example, rectangular window parts provided at four locations.
- the material forming the transmissive portion 161 is not particularly limited as long as it is a material that transmits ultraviolet UV, and for example, quartz glass is adopted.
- the partition 16 allows the ultraviolet rays UV emitted from the irradiation source 14 to pass through while blocking the atmosphere between the first region S1 and the second region S2.
- the acrylic resin can be used as the ultraviolet curable resin material, for example. It is also possible to add a polymerization initiator or the like to the above resin and use it.
- the raw material gas containing such a resin is generated by the gas supply line 100 installed outside the vacuum chamber 10.
- the gas supply line 100 is connected to the gas supply unit 13, and the raw material gas containing the resin is supplied into the vacuum chamber 10.
- the gas supply line 100 has a resin material supply line 110, a vaporizer 120, and a pipe 130.
- the resin material supply line 110 is composed of a tank 111 filled with a liquid resin material, and a pipe 112 that conveys the resin material from the tank 111 to the vaporizer 120.
- a method of transporting the resin material from the tank 111 to the vaporizer 120 for example, there is a method of using a carrier gas made of an inert gas.
- a valve V1, a liquid flow rate controller (not shown), or the like can be attached to the pipe 112.
- the vaporizer 120 generates a raw material gas by generating a mist of the resin material conveyed from the pipe 112. Here, generation of mist of the resin material is used in the sense of vaporizing the resin material.
- the vaporizer 120 is configured to be able to maintain the vaporized state of the resin material by being heated by a heating mechanism (not shown).
- the vaporizer 120 is connected to the pipe 130.
- the raw material gas generated by the vaporizer 120 is supplied to the gas supply unit 13 via the pipe 130.
- a valve V2 it is also possible to attach a valve V2 to the pipe 130 and adjust the flow of gas into the gas supply unit 13.
- a flow rate controller it is possible to control the flow rate of gas flowing into the gas supply unit 13.
- the pipe 130 is also heated by a heating mechanism (not shown) to a temperature at which the vaporized state of the raw material gas can be maintained.
- a film forming method using the film forming apparatus 1 mainly includes the following two steps. That is, by supplying a source gas containing an ultraviolet curable resin from the gas supply unit 13 onto the substrate W to form an ultraviolet curable resin layer on the substrate W, and by irradiating ultraviolet UV from the irradiation source 14, And a step of curing the ultraviolet curable resin layer.
- the substrate W is placed on the support surface 151a.
- the support surface 151a supports the substrate W such that the outer peripheral edge E of the substrate W projects from the side surface portion 151w.
- the ring-shaped deposition preventing frame portion 18 is arranged around the cooling stage 15.
- the first region S1 is regulated to a predetermined degree of vacuum by the vacuum exhaust system 19.
- a mask or the like capable of blocking the non-film-forming portion may be arranged on the substrate W, which facilitates pattern formation of the ultraviolet curable resin layer.
- the gas supply line 100 generates a raw material gas from the resin material and supplies the raw material gas into the vacuum chamber 10 via the gas supply unit 13.
- the vaporizer 120 vaporizes a resin material and generates a raw material gas containing an ultraviolet curable resin.
- the generated source gas is supplied to the gas supply unit 13 via the pipe 130, and the source gas is discharged from the gas supply unit 13 toward the substrate W. When the source gas reaches the substrate W, the resin in the source gas condenses on the substrate W and forms an ultraviolet curable resin layer.
- the irradiation source 14 irradiates the substrate W with ultraviolet UV to cure the ultraviolet curable resin layer.
- the ultraviolet rays UV emitted from the irradiation source 14 pass through the transmission part 161 of the partition wall 16.
- the ultraviolet rays UV transmitted through the transmission part 161 are irradiated onto the substrate W through the gap between the branch pipe parts 131. Further, a part of the ultraviolet rays UV radiated toward the side wall of the second chamber main body 12 is reflected by the reflection plate 17 and is condensed on the substrate W arranged on the support surface 151a.
- the gas supply unit 13 is composed of a plurality of branch piping units 131 arranged at intervals from each other, it is possible to reach the substrate W without blocking the ultraviolet rays UV emitted from the irradiation source 14. Becomes Thereby, the ultraviolet curable resin layer can be efficiently cured.
- FIG. 3 is a schematic diagram showing the operation of this embodiment.
- the ultraviolet curable resin layer 30 formed by irradiation with ultraviolet UV is deposited not only on the substrate W but also on the deposition-inhibitory frame portion 18 arranged on the outer periphery of the substrate W. Particularly, as the continuous film formation is continued, the deposition of the ultraviolet curable resin layer 30 becomes more remarkable.
- the ultraviolet curable resin layer 30 may be formed below the outer peripheral edge W of the substrate W due to conveyance deviation of the substrate W (dispersion of supporting position when the substrate W is placed on the supporting surface 151a). To be deposited. When the ultraviolet curable resin layer 30 is deposited under the outer peripheral edge W of the substrate W, the phenomenon occurs that the substrate W rides on the ultraviolet curable resin layer 30 and the substrate W separates from the supporting surface 151a.
- the substrate W is separated from the supporting surface 151a, and the cooling efficiency by the cooling stage 15 is reduced. Therefore, the in-plane temperature distribution of the substrate W becomes uniform, and the film thickness distribution of the ultraviolet curable resin layer 30 formed on the substrate W becomes uneven.
- the recess 181h in the attachment-prevention frame portion 18 it is possible to suppress the phenomenon that the substrate W separates from the support surface 151a due to the riding of the ultraviolet curable resin layer 30, and the substrate W is supported. It contacts the entire surface of 151a. As a result, the in-plane temperature distribution of the substrate W becomes uniform due to the cooling effect of the cooling stage 15. As a result, the ultraviolet curable resin layer 30 is formed on the substrate W with a good film thickness distribution.
- the UV curable resin layer 30 may be deposited in the second gap C2 during long-time driving.
- FIG. 4 is a schematic cross-sectional view of a film forming apparatus according to Modification 1 of this embodiment.
- FIG. 4 corresponds to the cross-sectional view taken along the line AA of FIG.
- the cooling stage 15 is provided with a gas injection mechanism 153 that injects the inert gas G from the second gap C2 toward the side wall of the vacuum chamber 10 via the first gap C1. ..
- the inert gas G is, for example, N 2 , Ar or the like.
- the gas injection mechanism 153 includes, for example, a gas introduction pipe 153a attached to the cooling stage 15, a flow path 153b communicating with the first gap C1, a first gap C1, and a second gap C2.
- the flow path 153b is provided in the gas introduction pipe 153a and the cooling stage 15.
- the gas introduction pipe 153a and the flow path 153b are not particularly limited and may be arranged in plural along the first gap C1, for example.
- the total flow rate of the inert gas G introduced into the flowing first region S1 is, for example, 0.01 slm or more and 1 slm or less.
- the inert gas G When the gas injection mechanism 153 injects the inert gas G from the second gap C2 toward the side wall of the vacuum chamber 10, the inert gas G is sucked by the exhaust groove 201, and the vacuum exhaust system 19 vacuum chamber. It is exhausted outside 10. That is, on the outer periphery of the cooling stage 15, a flow of the inert gas G is formed from the second gap C2 toward the side wall of the vacuum chamber 10.
- the raw material gas existing in the vicinity of the recess 181h is pushed back by the inert gas G from the cooling stage 15 toward the side wall of the vacuum chamber 10. Therefore, the source gas is unlikely to enter the first gap C1, and the ultraviolet curable resin layer 30 is less likely to be formed in the first gap C1. As a result, the phenomenon that the substrate W runs on the ultraviolet curable resin layer 30 is more reliably prevented, and the substrate W is less likely to be separated from the cooling stage 15.
- the phenomenon that the ultraviolet curable resin layer 30 is deposited on the side wall portion 181w may occur in the recess 181h (FIG. 3).
- the inert gas G is separated from the first gap C1
- the concentration of the inert gas G becomes lean and the effect of repelling the raw material gas becomes weaker.
- the ultraviolet curable resin layer 30 deposited on the side wall portion 181w continues to grow, the phenomenon that the substrate W is lifted by the ultraviolet curable resin layer 30 may occur.
- the growth of the ultraviolet curable resin layer 30 on the side wall portion 181w becomes remarkable when continuous film formation is attempted for a long time.
- FIG. 5A and 5B are schematic cross-sectional views of a film forming apparatus according to Modification 2 of the present embodiment.
- FIG. 5A corresponds to a sectional view taken along the line AA of FIG. 2A.
- FIG. 5B is an enlarged view of FIG.
- the attachment-prevention frame portion 18 is provided with a partition portion 181 p facing the side wall portion 181 w in the recess 181 h.
- the partition 181p is annular and surrounds the cooling stage 15.
- a third gap C3 arranged in parallel with the first gap C1 is provided between the partition 181p and the side wall 181w.
- the gap width of the third gap C3 is 0.01 mm or more and 0.5 mm or less.
- a fourth gap C4, which communicates with the second gap C2 and the third gap C3, is provided between the partition 181p and the substrate W.
- the flow path 153b communicates not only with the first gap C1 but also with the third gap C3. In other words, the downstream side of the flow path 153b is bifurcated by the first gap C1 and the third gap C3.
- the width of the fourth gap C4 is wider than the width of the second gap C2.
- the fourth gap C4 is also the difference in height between the partition 181p and the support surface 151a.
- the gap width of the fourth gap C4 is 0.01 mm or more and 1 mm or less.
- the gas injection mechanism 153 includes, for example, a gas introduction pipe 153a, a flow passage 153b, a first gap C1, a second gap C2, a third gap C3 communicating with the flow passage 153b, and a fourth gap. It The gas injection mechanism 153 injects the inert gas G from the second gap C2 and the fourth gap C4 toward the side wall of the vacuum chamber 10 via the first gap C1 and also via the third gap C3. Inert gas G is jetted from the fourth gap C4 toward the side wall. Deposition apparatus.
- the inert gas is introduced not only into the first gap C1 but also into the third gap C3.
- the source gas is less likely to adhere to the side wall 181w forming the recess 181h, and the ultraviolet curable resin layer 30 is less likely to be formed on the side wall 181w.
- the gap width of the fourth gap C4 is configured to be wider than the gap width of the second gap C2
- the ultraviolet curable resin layer 30 is formed above the partition 181p as shown in FIG. 5B. Even if it does, the ultraviolet curable resin layer 30 is hard to reach the substrate W as the distance of the gap becomes longer. As a result, the substrate W is less likely to be separated from the support surface 151a.
- the taper portion 181t is provided at the upper corner of the partition portion 181p on the side opposite to the side wall portion 181w, the effect of delaying the time for the ultraviolet curable resin layer 30 to reach the substrate W is increased. As a result, the substrate W is less likely to be separated from the support surface 151a.
- FIG. 6 is a schematic plan view of a film forming apparatus according to Modification 3 of the present embodiment.
- FIG. 6 shows a plane when the first region S1 is viewed from above in the vertical direction.
- the gas injection mechanism 153 has a flow rate of the inert gas G flowing through the third gap C3 facing the corner 151c of the support surface 151a, and the first portion facing the side 151s of the support surface 151a other than the corner 151c. 3
- the flow rate of the inert gas G flowing through the gap C3 is controlled independently.
- the gas injection mechanism 153 illustrated in FIG. 5 has the flow rate of the inert gas G flowing through the first gap C1 facing the corner 151c and the inert gas flowing through the first gap C1 facing the side 151s. The flow rate of the gas G will be controlled independently.
- the raw material gas flows from the cooling stage 15 to the side wall of the vacuum chamber 10 at a flow rate of the inert gas G according to the concentration of each region around the supporting surface 151a. Pushed back towards. As a result, the phenomenon that the ultraviolet curable resin layer 30 is preferentially deposited in the recess 181h near the corner 151c is avoided as compared with the recess 181h near the side 151s.
- FIG. 7 is a schematic sectional view of a film forming apparatus according to Modification 4 of this embodiment.
- the multiple branch piping parts may be replaced with a shower plate.
- the gas supply part 13B has a shower plate part 1332 and a space part 1330.
- the shower plate portion 1332 is arranged between the partition wall 16 and the supporting surface 151a, has a plurality of gas supply holes 1331 penetrating in the thickness direction, and constitutes a plate-like shower plate having ultraviolet transparency as a whole.
- the space portion 1330 is a space formed by a gap between the partition wall 16 and the shower plate portion 1332 and partitioned by these and the first chamber body 11.
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Abstract
Description
上記冷却ステージは、基板を支持する支持面と上記支持面に連なる側面部とを有し、上記支持面に支持される上記基板の外周端が上記側面部から突き出るように構成される。
上記防着枠部は、環状であり、上記冷却ステージの上記側面部を囲むように配置され、上記基板の上記外周端に対向する位置に凹部が設けられ、上記凹部により上記側面部が囲まれる。
上記ガス供給部は、上記支持面に向けてエネルギ線硬化樹脂を含む原料ガスを供給する。
上記照射源は、上記支持面に対向し、上記エネルギ線硬化樹脂を硬化させるエネルギ線を上記支持面に向けて照射する。
上記真空槽は、上記冷却ステージ、上記防着枠部、上記ガス供給部、及び上記照射源を収容する。
上記冷却ステージの上記側面部と上記防着枠部との間には、第1隙間が設けられ、
上記防着枠部と上記基板との間には、第2隙間が設けられ、
上記冷却ステージには、上記第1隙間を経由して上記第2隙間から上記真空槽の側壁に向けて不活性ガスを噴射するガス噴射機構が設けられてもよい。
上記防着枠部に設けられた上記凹部は、
底面部と、
上記底面部に連設され、上記冷却ステージの上記側面部に対向する側壁部と、
上記底面部に連設され、上記底面部及び上記側壁部を囲む外周部と
によって構成され、
上記凹部には、上記側壁部に対向し、上記冷却ステージを囲む衝立部が付設され、
上記衝立部と上記側壁部との間には、上記第1隙間と並設する第3隙間が設けられ、
上記衝立部と上記基板との間には、第4隙間が設けられ、
上記ガス噴射機構は、上記第1隙間を経由して、上記第2隙間及び上記第4隙間から上記真空槽の上記側壁に向かって上記不活性ガスを噴射するとともに、上記第3隙間を経由して上記第4隙間から上記側壁に向かって上記不活性ガスを噴射してもよい。
上記冷却ステージの上記支持面は、矩形であり、
上記ガス噴射機構は、
上記支持面の角部に対向する上記第3隙間を流れる上記不活性ガスの流量と、上記角部以外の上記支持面の辺部に対向する上記第3隙間を流れる上記不活性ガスの流量とを独立して制御してもよい。
上記冷却ステージの上記側面部を囲む環状の防着枠部であって、上記基板の上記外周端に対向する位置に凹部が設けられ、上記側面部が上記凹部によって囲まれた上記防着枠部が上記冷却ステージの周りに配置される。
上記基板に向けてエネルギ線硬化樹脂を含む原料ガスが供給される。
上記エネルギ線硬化樹脂を硬化させるエネルギ線を上記基板に向けて照射することにより、上記基板上に樹脂層が形成する。
成膜装置。
10…真空槽
11…第1チャンバ本体
11c…角部
12…第2チャンバ本体
13、13B…ガス供給部
14…照射源
15…冷却ステージ
16…隔壁
17…反射板
18…防着枠部
19…真空排気系
20…外枠部材
30…紫外線硬化樹脂層
100…ガス供給ライン
110…樹脂材料供給ライン
111…タンク
112…配管
120…気化器
130…配管
131…分岐配管部
151…基板支持台
151a…支持面
151w…側面部
151s…辺部
151c…角部
153…ガス噴射機構
153a…ガス導入管
153b…流路
161…透過部
181h…凹部
181e…外周部
181b…底面部
181w…側壁部
181p…衝立部
181t…テーパ部
201…排気溝
1330…空間部
1331…ガス供給孔
1332…シャワープレート部
V1、V2…バルブ
C1…第1隙間
C2…第2隙間
C3…第3隙間
C4…第4隙間
S1…第1領域
S2…第2領域
W…基板
E…外周端
Claims (6)
- 基板を支持する支持面と前記支持面に連なる側面部とを有し、前記支持面に支持される前記基板の外周端が前記側面部から突き出るように構成された冷却ステージと、
前記冷却ステージの前記側面部を囲むように配置され、前記基板の前記外周端に対向する位置に凹部が設けられ、前記凹部により前記側面部が囲まれた環状の防着枠部と、
前記支持面に向けてエネルギ線硬化樹脂を含む原料ガスを供給するガス供給部と、
前記支持面に対向し、前記エネルギ線硬化樹脂を硬化させるエネルギ線を前記支持面に向けて照射する照射源と、
前記冷却ステージ、前記防着枠部、前記ガス供給部、及び前記照射源を収容する真空槽と
を具備する成膜装置。 - 請求項1に記載された成膜装置であって、
前記冷却ステージの前記側面部と前記防着枠部との間には、第1隙間が設けられ、
前記防着枠部と前記基板との間には、第2隙間が設けられ、
前記冷却ステージには、前記第1隙間を経由して前記第2隙間から前記真空槽の側壁に向けて不活性ガスを噴射するガス噴射機構が設けられている
成膜装置。 - 請求項2に記載された成膜装置であって、
前記防着枠部に設けられた前記凹部は、
底面部と、
前記底面部に連設され、前記冷却ステージの前記側面部に対向する側壁部と、
前記底面部に連設され、前記底面部及び前記側壁部を囲む外周部と
によって構成され、
前記凹部には、前記側壁部に対向し、前記冷却ステージを囲む衝立部が付設され、
前記衝立部と前記側壁部との間には、前記第1隙間と並設する第3隙間が設けられ、
前記衝立部と前記基板との間には、第4隙間が設けられ、
前記ガス噴射機構は、前記第1隙間を経由して、前記第2隙間及び前記第4隙間から前記真空槽の前記側壁に向かって前記不活性ガスを噴射するとともに、前記第3隙間を経由して前記第4隙間から前記側壁に向かって前記不活性ガスを噴射する
成膜装置。 - 請求項2または3に記載された成膜装置であって、
前記第4隙間の幅は、前記第2隙間の幅よりも広い
成膜装置。 - 請求項2~4のいずれか1つに記載された成膜装置であって、
前記冷却ステージの前記支持面は、矩形であり、
前記ガス噴射機構は、
前記支持面の角部に対向する前記第3隙間を流れる前記不活性ガスの流量と、前記角部以外の前記支持面の辺部に対向する前記第3隙間を流れる前記不活性ガスの流量とを独立して制御する
成膜装置。 - 基板を支持する支持面と前記支持面に連なる側面部とを有する冷却ステージの前記支持面に前記基板の外周端が前記側面部から突き出るよう前記基板を支持し、
前記冷却ステージの前記側面部を囲む環状の防着枠部であって、前記基板の前記外周端に対向する位置に凹部が設けられ、前記側面部が前記凹部によって囲まれた前記防着枠部を前記冷却ステージの周りに配置し、
前記基板に向けてエネルギ線硬化樹脂を含む原料ガスを供給し、
前記エネルギ線硬化樹脂を硬化させるエネルギ線を前記基板に向けて照射することにより、前記基板上に樹脂層を形成する
成膜方法。
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