WO2016204022A1 - 成膜方法及び成膜装置 - Google Patents
成膜方法及び成膜装置 Download PDFInfo
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- WO2016204022A1 WO2016204022A1 PCT/JP2016/066895 JP2016066895W WO2016204022A1 WO 2016204022 A1 WO2016204022 A1 WO 2016204022A1 JP 2016066895 W JP2016066895 W JP 2016066895W WO 2016204022 A1 WO2016204022 A1 WO 2016204022A1
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- substrate
- mask member
- temperature
- film forming
- film
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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
- B05D1/32—Processes for applying liquids or other fluent materials using means for protecting parts of a surface not to be coated, e.g. using stencils, resists
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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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- 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
- C23C14/04—Coating on selected surface areas, e.g. using masks
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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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- 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
Definitions
- the present invention relates to a film forming method and a film forming apparatus for patterning a resin layer made of an energy beam curable resin.
- Patent Document 1 describes a method in which a resin layer obtained by condensing a raw material gas containing an ultraviolet curable resin is formed on the surface of a substrate cooled to a predetermined temperature, and then the resin layer is cured by ultraviolet irradiation. Yes.
- Patent Document 1 describes a method for forming a pattern of an ultraviolet curable resin layer by arranging a mask capable of shielding a non-film formation area on a substrate (see paragraph [Patent Document 1]). 0045]).
- the source gas also adheres to the mask. For this reason, when the mask is cooled together with the substrate, the source gas is condensed on the mask, and the energy ray curable resin in the source gas is deposited on the mask by subsequent ultraviolet irradiation. If the deposition amount on the mask increases due to repetition of such a phenomenon, the shape accuracy of the opening pattern of the mask decreases or particles are generated to stabilize the resin layer having the desired film quality and pattern shape. There is a problem in that it is difficult to form.
- an object of the present invention is to provide a film forming method and a film forming apparatus capable of stably forming a resin layer having a desired film quality and pattern shape.
- a film forming method includes cooling a substrate to a first temperature or lower in a chamber maintained in a reduced-pressure atmosphere.
- a source gas that contains an energy ray curable resin and can be liquefied below the first temperature is supplied from the gas supply unit to the surface of the substrate.
- a mask member maintained at a second temperature higher than the first temperature and having a predetermined opening pattern is disposed to face the surface of the substrate. The surface of the substrate is irradiated with energy rays.
- the source gas is condensed by contact with the substrate surface cooled to the first temperature or lower, thereby forming a liquid film containing an energy ray curable resin on the substrate surface.
- the mask member disposed opposite to the surface of the substrate is maintained at a temperature (second temperature) at which the source gas can be evaporated.
- the area to be shielded evaporates (revaporizes) by radiant heat from the mask member or a reduced-pressure atmosphere in the chamber.
- the liquid film is patterned so as to correspond to the shape of the opening pattern.
- a cured resin layer of the energy beam curable resin is formed on the substrate by irradiation with the energy beam.
- the mask member is maintained at the second temperature, the source gas is prevented from condensing on the mask member, and therefore, the deposition of the energy ray curable resin in the source gas on the mask member is prevented.
- The the shape accuracy of the opening pattern of the mask member can be maintained, and the generation of particles due to the falling off of the film deposition from the mask member can be prevented. Therefore, according to the film forming method, it is possible to stably form a resin layer having a desired film quality and pattern shape.
- the method for maintaining the mask member at the second temperature is not particularly limited.
- the mask member is heated to the second temperature by radiant heat or heat conduction from an appropriate heating source installed inside the chamber, or The mask member may be heated so as not to fall below the second temperature.
- the mask member may be maintained at the second temperature by self-heating, such as by incorporating a heater in the mask member, or by configuring the mask member with a resistance heater.
- the second temperature is near room temperature, the mutual relationship of the mask member is set so that the mask member does not come into contact with the substrate cooled to the first temperature. You may make it maintain to.
- the arrangement of the mask member on the substrate surface may be before the liquid film of the energy ray curable resin is formed on the substrate surface, or after the liquid film is formed.
- the distance of the mask member facing the substrate surface is not particularly limited. Typically, the mask member is disposed proximate to the substrate surface. In this case, the distance between the mask member and the substrate surface may be fixed or variable.
- the source gas is supplied to the surface of the substrate to form a liquid film containing the energy ray curable resin on the surface of the substrate, and then the mask member is attached to the substrate. It may be close to the surface.
- the source gas may be supplied to the surface of the substrate through the opening pattern after the mask member is disposed at a position separated from the surface of the substrate.
- the mask member is moved away from the surface of the substrate by a first distance from a position separated from the surface of the substrate by the second distance shorter than the first distance. It may include moving to a position separated by a distance. Note that the second distance may be zero.
- the film forming method further includes a step of heating the mask member to the second temperature by a heating source installed in the chamber before disposing the mask member to face the surface of the substrate.
- a heating source installed in the chamber before disposing the mask member to face the surface of the substrate.
- the gas supply unit may be configured by a shower head disposed inside the chamber and having the heating source, and the mask member may be heated by radiant heat or heat conduction from the shower head. .
- the film forming method further includes a step of heating the mask member to the second temperature by a heating element included in the mask member before disposing the mask member so as to face the surface of the substrate. May be.
- a film formation apparatus includes a chamber, a stage, a gas supply unit, a mask member, and an irradiation source.
- the chamber is configured to be able to maintain a reduced pressure atmosphere.
- the stage includes a support surface for supporting the substrate and a cooling source capable of cooling the support surface to a first temperature or lower, and is disposed inside the chamber.
- the gas supply unit is arranged to face the stage, and is configured to be able to supply a source gas containing energy ray curable resin and liquefiable at a temperature equal to or lower than the first temperature to the substrate on the support surface. .
- the mask member can maintain a second temperature higher than the first temperature, has a predetermined opening pattern, and is disposed to face the support surface.
- the irradiation source is configured to be capable of irradiating an energy beam for curing the energy beam curable resin toward the support surface.
- a resin layer having a desired film quality and pattern shape can be stably formed.
- FIG. 1 It is sectional drawing which shows schematically the film-forming apparatus which concerns on one Embodiment of this invention. It is a schematic plan view of the mask member in the said film-forming apparatus. It is a schematic sectional side view of the principal part of the film-forming apparatus which shows an example of the film-forming method concerning this embodiment. It is a schematic sectional side view of the principal part of the film-forming apparatus which shows an example of the film-forming method which concerns on a comparative example. It is a schematic sectional side view of the principal part of the film-forming apparatus which shows the other example of the film-forming method concerning this embodiment. It is a schematic sectional side view of the principal part of the film-forming apparatus which shows the further another example of the film-forming method which concerns on this embodiment.
- FIG. 1 is a cross-sectional view schematically showing a film forming apparatus according to an embodiment of the present invention.
- the X axis, the Y axis, and the Z axis indicate the three axial directions orthogonal to each other, the X axis and the Y axis correspond to the horizontal direction, and the Z axis corresponds to the height direction, respectively.
- the film forming apparatus 1 includes a chamber 10, a gas supply unit 13, an irradiation source 14, a stage 15, and a mask member 16.
- the film forming apparatus 1 supplies a source gas containing an ultraviolet curable resin (hereinafter also referred to as a UV curable resin) as an energy ray curable resin to the surface of the substrate W supported by the stage 15, and a condensate of the source gas. It is configured to be able to form a liquid film made of In addition, the film forming apparatus 1 irradiates the surface of the substrate W with ultraviolet rays as energy rays from the irradiation source 14 to form an ultraviolet curable resin layer having a predetermined shape on the surface of the substrate W. Configured to be possible.
- an ultraviolet curable resin hereinafter also referred to as a UV curable resin
- the substrate W various substrates such as a glass plate, a ceramic plate, and a semiconductor wafer on which the ultraviolet curable resin layer is to be formed are used.
- the shape of the substrate is not particularly limited, and may be a rectangle or a circle.
- Various functional elements coated with the ultraviolet curable resin layer may be provided on the surface of the substrate W.
- the chamber 10 has a divided structure of a first chamber body 11 and a second chamber body 12.
- the first chamber body 11 and the second chamber body 12 are connected to each other with a partition wall 101 (gas supply unit 13) parallel to the XY plane interposed therebetween.
- the first space portion S1 is partitioned, and the second space portion S2 is partitioned inside the second chamber body 12.
- the first space S1 is connected to the evacuation system 19, and is configured to be evacuated to a predetermined reduced pressure atmosphere by the evacuation system 19.
- the degree of vacuum at this time is not particularly limited, and is, for example, 10 ⁇ 3 to 500 Pa.
- the first space S1 is maintained in the predetermined reduced-pressure atmosphere by being evacuated by the vacuum evacuation system 19 during the film forming process of the substrate W.
- the second space S2 is maintained at atmospheric pressure, and an irradiation source 14 described later is disposed therein.
- the stage 15 is installed in the first space S ⁇ b> 1 of the chamber 10.
- the stage 15 has a support surface 151 capable of supporting the substrate W.
- the support surface 151 is formed in parallel to the XY plane so as to face the partition wall 101.
- the support surface 151 has an area larger than that of the substrate W, and the shape thereof is not particularly limited, and may be circular or rectangular.
- the stage 15 is attached to the first chamber main body 11 via a seal mechanism or the like (not shown), and is connected to a refrigerant supply source 152 installed outside the chamber 10. Inside the stage 15, a circulation channel through which the refrigerant supplied from the refrigerant supply source 152 passes is provided as a cooling source.
- the coolant supply source 152 is configured to cool the support surface 151 so that the entire surface of the substrate W can be maintained at a predetermined temperature (first temperature) or lower.
- the first temperature is a temperature at which a source gas supplied from a gas supply unit 13 (to be described later) is condensed and liquefied inside the first chamber body 11.
- the first temperature is appropriately set according to the type of energy beam curable resin constituting the source gas.
- the first temperature is typically set to a temperature not higher than room temperature (for example, 0 ° C.).
- stage 15 may be configured to be able to move up and down along the Z-axis direction inside the first chamber body 11 and to rotate around the Z-axis.
- the distance between the substrate W and the mask member 16 can be adjusted by moving the stage 15 up and down.
- the gas supply unit 13 has a gas head-like structure formed integrally with the partition wall 101.
- the entire gas supply unit 13 is made of a material (for example, quartz glass) that can transmit ultraviolet rays.
- the internal space 130 connected to the gas supply line 100 is formed in the gas supply unit 13.
- a plurality of gas supply holes 131 for supplying the source gas introduced into the internal space 130 toward the support surface 151 of the stage 15 are formed on the bottom surface of the gas supply unit 13 facing the first space S1. Is provided.
- the gas supply unit 13 is configured as a shower head that supplies the source gas toward the substrate W on the support surface 151.
- the gas supply unit 13 includes a heating unit 132 that can maintain the internal space 130 and the plurality of gas supply holes 131 at a temperature (second temperature) higher than the first temperature.
- the heating unit 132 is configured by embedding a resistance heating wire made of, for example, carbon or the like in the bottom surface of the gas supply unit 13.
- the heating unit 132 also has a function as a heating source that heats the mask member 16 to the second temperature over the entire surface, as will be described later.
- the second temperature is a temperature at which the source gas introduced into the internal space 130 can be prevented from condensing.
- the second temperature is appropriately set according to the type of energy beam curable resin constituting the source gas. In the case of an acrylic resin, the second temperature is typically set to a temperature higher than room temperature (for example, 30 ° C.).
- the gas supply line 100 includes a resin material supply line 110 and a vaporizer 120.
- the resin material supply line 110 includes a tank 111 that contains a liquid UV curable resin, and a pipe 112 that conveys the UV curable resin from the tank 111 to the vaporizer 120.
- a liquid UV curable resin In this embodiment, an acrylic resin material is used as the UV curable resin, but it is not limited to this.
- Examples of the method for transporting the UV curable resin from the tank 111 to the vaporizer 120 include pressure feeding using a carrier gas made of an inert gas.
- the pipe 112 may be provided with a flow rate adjustment valve V1 and the like.
- the vaporizer 120 is configured to vaporize the UV curable resin conveyed via the pipe 112 and generate a raw material gas containing the UV curable resin.
- the vaporizer 120 has a heating mechanism (not shown), and is configured to generate a source gas by heating and evaporating the UV curable resin.
- the raw material gas generated in the vaporizer 120 is introduced into the internal space 130 of the gas supply unit 13 through the pipe 121.
- the flow rate of the source gas introduced into the gas supply unit 13 is controlled by the flow rate adjustment valve V2 attached to the pipe 121.
- the temperature of the pipe 121 is adjusted so as to maintain the vaporized state of the source gas by a heating mechanism (not shown).
- the irradiation source 14 is disposed in the second space S2 of the chamber 10 and is configured to be able to irradiate ultraviolet rays toward the support surface 151 of the stage 15 through the partition wall 101 (gas supply unit 13).
- the irradiation source 14 has an ultraviolet light source composed of, for example, a plurality of ultraviolet lamps.
- the mask member 16 is disposed in the first space S1 of the chamber 10, and in this embodiment, the mask moving mechanism (not shown) makes the X axis direction and the Y axis direction with respect to the substrate W on the support surface 151. , Z-axis direction, configured to be movable along the rotation direction ( ⁇ direction) around the Z-axis.
- FIG. 2 is a schematic plan view of the mask member 16.
- the mask member 16 is typically made of a material that is not transparent to ultraviolet rays (a material that does not transmit ultraviolet rays) such as a metal material.
- the mask member 16 is formed in a size that can cover the surface of the substrate W, and the shape of the mask member 16 can be arbitrarily selected according to the shape of the substrate W.
- the mask member 16 is configured to be able to maintain the second temperature.
- the mask member 16 is configured to be heated or heated by radiant heat or heat conduction from an appropriate heating source (for example, the heating unit 132 of the gas supply unit 13) inside the chamber 10.
- the mask member 16 may include a heating element such as a resistance heating wire, or the mask member 16 may be configured of a heating element. In this case, since the mask member 16 itself can be heated by energization, the mask member 16 can be maintained at a predetermined temperature for a long time.
- the mask member 16 has an opening pattern 16P for forming a resin layer having a desired patterning shape.
- the opening pattern 16P includes a plurality of openings 160, and the shape of each opening 160 is not limited to the same shape, and the shape is not limited to a rectangle.
- the mask member 16 has a function of limiting an ultraviolet irradiation region to the substrate W when the substrate W on the support surface 151 is irradiated with ultraviolet rays from the irradiation source 14. Note that when the substrate W is irradiated with ultraviolet rays, the mask member 16 may be moved to a position where the substrate W is not covered.
- the mask member 16 is configured to be movable in the first space S1 via the mask moving mechanism.
- the alignment with respect to the substrate W on the support surface 151 is configured to be possible, and the distance in the Z-axis direction from the substrate W is configured to be changeable.
- the mask member 16 has a position close to the bottom surface of the gas supply unit 13 (first position) as shown by a two-dot chain line in FIG. 1 and a support surface 151 as shown by a solid line in FIG. It is configured to be movable along the Z-axis direction between a position close to the upper substrate W (second position).
- the mask moving mechanism may be configured to be able to stop the mask member 16 at an arbitrary position between the first position and the second position.
- the first position is set to a position that can be heated to the second temperature by radiant heat from the heating unit 132 of the gas supply unit 13.
- the mask member 16 may be subjected to an appropriate surface treatment for efficiently absorbing the radiant heat from the heating unit 132.
- the first position may be a position where the mask member 16 contacts the bottom surface of the gas supply unit 13. In this case, the mask member 16 can be heated to the second temperature by heat conduction from the heating unit 132 of the gas supply unit 13.
- the liquid film formed of the condensate of the source gas formed on the surface of the substrate W is evaporated (vaporized) by the radiant heat from the mask member 16 heated to the second temperature.
- the facing distance of the mask member 16 from the substrate surface is set to several mm to several cm, for example. Note that the facing distance may be zero. In this case, the mask member 16 and the substrate W are in contact with each other.
- the film forming apparatus 1 places the mask member 16 close to the substrate W before or after forming the liquid film of the source gas on the surface of the substrate W on the stage 15, and the substrate W covered with the mask member 16.
- the upper liquid film is evaporated by radiant heat from the mask member 16.
- the film forming apparatus 1 cures the remaining liquid film by irradiating the surface of the substrate W with ultraviolet rays from the irradiation source 14 through the opening pattern 16P of the mask member 16, and thereby a resin having a predetermined shape on the substrate W. Form a layer.
- FIG. 1 is schematic side cross-sectional views of the main part of the film forming apparatus 1 showing an example of the film forming method according to the present embodiment.
- the mask member 16 Before starting the film formation, as shown in FIG. 3A, the mask member 16 is in a first position close to the gas supply unit 13, and the source gas is condensed by the heating unit 132 (see FIG. 1) together with the gas supply unit 13. It is heated to the second temperature at which (liquefaction) can be prevented.
- the first space S1 of the chamber 10 is maintained in a predetermined reduced pressure atmosphere, and the substrate W on the stage 15 is cooled to the first temperature necessary for condensing (liquefying) the source gas. ing.
- the source gas G introduced into the gas supply unit 13 through the gas supply line 100 is, as shown in FIG. 3A, the substrate on the stage 15 through the internal space 130 and the plurality of gas supply holes 131. Supplied to the surface of W. Then, the contact with the surface of the substrate W maintained at the first temperature condenses the source gas G, and a liquid film L1 is formed on the surface of the substrate W.
- the mask member 16 is disposed at a position where it can come into contact with the source gas G supplied from the gas supply unit 13, but the mask member 16 is maintained at the second temperature as described above. Therefore, condensation of the raw material gas G on the mask member 16 is prevented. Therefore, deposition of the energy beam curable resin in the source gas on the mask member 16 is prevented.
- the mask member 16 is disposed between the gas supply unit 13 and the substrate W on the stage 15, there is a possibility that a shielding structure may be formed in supplying the source gas G to the surface of the substrate W.
- the source gas G comes to wrap around to the region facing the mask member 16 on the surface of the substrate W.
- the surface of the substrate W Since the liquid film L1 is formed with a substantially uniform thickness over the entire area, there is no problem in film formation.
- the surface shape of the substrate, etc., wetting and spreading of the liquid film L1 on the surface of the substrate W can be expected, and it is possible to form a liquid film L1 having a more uniform thickness. It becomes.
- the mask member 16 may be placed on standby at a position directly below the gas supply unit 13 during film formation. In the heating process of the mask member 16 at that time, a heat source may be separately installed in the standby place, and the mask member 16 may be heated to the second temperature with the heat source.
- the mask member 16 is moved from the first position toward the second position. Due to the approach of the mask member 16, evaporation (revaporization) of a part of the liquid film L ⁇ b> 1 on the substrate W (region facing the mask member 16) is promoted by the radiant heat from the mask member 16.
- the supply of the raw material gas G from the gas supply unit 13 may be stopped or continued. Even when the supply of the source gas G is continued, evaporation of the region of the liquid film L1 shielded by the mask member 16 is efficiently promoted by the radiant heat and the reduced pressure atmosphere. In both cases where the supply of the source gas G is stopped and continued, the region of the liquid film L1 facing the opening 160 (opening pattern 16P) of the mask member 16 can maintain a larger film thickness than the other regions. Therefore, subsequent patterning of the liquid film L1 becomes easy.
- the liquid film L1 on the substrate W corresponds to the opening pattern 16P by promoting the evaporation action by the radiant heat from the mask member 16 due to the proximity to the mask member 16. It is patterned into a shape to make. Also at this time, the supply of the source gas G from the gas supply unit 13 may be stopped or continued.
- the change in the pattern shape of the liquid film L1 is suppressed. Since the pattern shape of the liquid film L1 also includes heat radiation from the inner peripheral surface of the opening 160 of the mask member 16, strictly speaking, it does not match the size of each opening 160, and typically each opening. Slightly smaller than the portion 160.
- the supply of the source gas G is stopped, and the ultraviolet ray UV is irradiated from the irradiation source 14 onto the substrate W, whereby the liquid film L1 exposed from the opening pattern 16P is cured, As a result, a resin layer L2 having a predetermined shape is formed on the substrate W.
- the surface of the substrate W is irradiated with ultraviolet rays UV through the mask member 16, curing of the region of the liquid film L1 shielded by the mask member 16 is prevented.
- the uncured liquid film region shielded by the mask member 16 is reliably removed from the substrate W due to the evaporation effect of the reduced pressure atmosphere.
- the resin layer L2 having a predetermined shape can be stably formed on the substrate W without heating the mask member 16 more than necessary.
- the mask member 16 is raised from the second position to the first position shown in FIG. 3A, and the substrate W on the stage 15 is unloaded from the chamber 10, and a new substrate W is transferred from the outside of the chamber 10. It is carried onto the stage 15. Thereafter, a film forming process on the substrate is performed by repeating the same process as described above.
- FIG. 4 is a schematic cross-sectional side view for explaining a comparative example in which a mask M is disposed on a substrate W to form a film.
- the mask member M when the mask member M is directly provided on the surface of the substrate W cooled to a temperature at which the source gas G can be condensed, the mask member M is similarly cooled.
- the liquid film L1 made of the condensate of the source gas G is also formed on the surface of the mask member M. Therefore, the energy ray curable resin in the raw material gas is deposited on the mask member M by the subsequent ultraviolet irradiation.
- the mask accuracy (opening shape accuracy) decreases or particles are generated, and the desired film quality and pattern shape are obtained. There is a problem that it is difficult to stably form the resin layer.
- the mask member 16 is maintained at a temperature (second temperature) at which the source gas G can be prevented from condensing, so that the source gas G on the mask member 16 is maintained. Condensation is prevented, and therefore deposition of the UV curable resin in the raw material gas G onto the mask member 16 is prevented. Thereby, the shape accuracy of the opening pattern 16P of the mask member 16 can be maintained, and the generation of particles due to the falling off of the film from the mask member 16 is prevented. Therefore, according to the present embodiment, it is possible to stably form a resin layer having a desired film quality and pattern shape.
- FIG. 5 is a schematic sectional side view of the main part of the film forming apparatus 1 showing another example of the film forming method according to the present embodiment.
- This film formation example 2 differs from the film formation example 1 in that the position of the mask member 16 facing the substrate W on the stage 15 is fixed at the second position. That is, in this example, the position of the mask member 16 is fixed over the process of forming the liquid film L1 on the substrate W to the curing process of the liquid film L1 by ultraviolet irradiation. Also by such a method, it is possible to obtain the same effect as the film forming method 1 described above.
- the source gas G is supplied to the surface of the substrate W through the opening pattern 16P of the mask member 16.
- the liquid film L1 in which the source gas G is condensed spreads in the gap between the mask member 16 and the substrate W, but the liquid film L1 that wraps around directly below the mask member 16 is Since it is efficiently removed by the radiant heat of the mask member 16, the liquid film L1 does not exist immediately below the mask member 16.
- the liquid film L1 having a shape corresponding to the opening pattern 16P of the mask member 16 is directly formed on the substrate W.
- the liquid film L1 having a predetermined shape it is possible to form the liquid film L1 having a predetermined shape more quickly than in the case where the liquid film L1 is patterned by bringing the mask member 16 close to the substrate W in a subsequent process. As a result, the processing time can be shortened and the throughput can be improved.
- the heat treatment of the mask member 16 to the second temperature can be performed, for example, when the substrate W is carried in / out.
- the heating source in this case may be the heating unit 132 of the gas supply unit 13 as in the film formation example 1, or may be a heating source provided separately in the chamber 10.
- the mask member 16 includes a heating element, the mask member 16 is heated to the second temperature by the heating element before the mask member 16 is disposed to face the surface of the substrate W. Also good.
- FIGS. 3 and 6C are schematic side cross-sectional views of a main part of the film forming apparatus 1 showing still another example of the film forming method according to the present embodiment.
- This film formation example 3 is different from the film formation example 1 in that there are a plurality of proximity positions of the mask member 16 to the substrate W in the formation / patterning step of the liquid film L1 on the substrate W.
- the mask member 16 is at a position (third position) that is separated from the surface of the substrate W by a first distance when the liquid film L1 is formed, and at the time of patterning the liquid film L1. Move to a position (second position) separated from the surface by a second distance shorter than the first distance.
- the third position is set to a position where the region shielded by the mask member 16 in the liquid film L1 on the substrate W is induced to evaporate by radiant heat from the mask member 16.
- the mask member 16 is disposed at the third position, and the source gas G is supplied onto the substrate W through the opening pattern 16P of the mask member 16.
- the mask member 16 moves from the third position to the second position, and part of the liquid film L1 shielded by the mask member 16 is evaporated.
- the supply of the source gas G may be stopped or continued as in the first film formation example.
- the supply of the source gas G is stopped, and the ultraviolet ray UV is irradiated from the irradiation source 14 onto the substrate W, whereby the liquid film L1 exposed from the opening pattern 16P is cured, thereby A resin layer L2 having a predetermined shape is formed on the substrate W.
- the same effects as those of the film formation example 1 can be obtained.
- the mask member 16 since the mask member 16 is disposed at the third position when the liquid film L1 is formed, the liquid film L1 having a shape corresponding to the opening pattern 16P of the mask member 16 is formed on the substrate W. It becomes easy to be done. Further, since the separation distance from the substrate W is larger than the second position, the temperature rise of the substrate W due to the radiant heat of the mask member 16 is suppressed, and the condensing efficiency of the raw material gas G on the substrate W is increased to increase the liquid film. L1 can be formed efficiently.
- the heat treatment of the mask member 16 to the second temperature can be performed, for example, when the substrate W is carried in / out.
- the heating source in this case may be the heating unit 132 of the gas supply unit 13 as in the film formation example 1, or may be a heating source provided separately in the chamber 10.
- the mask member 16 includes a heating element, the mask member 16 is heated to the second temperature by the heating element before the mask member 16 is disposed to face the surface of the substrate W. Also good.
- the mask member 16 in order to maintain the mask member 16 at the second temperature, the mask member 16 is heated to the second temperature by radiant heat or heat conduction from the gas supply unit 13 (heating unit 132). Configured.
- the second temperature when the liquefaction temperature of the source gas (first temperature) is 0 ° C. or lower, the second temperature can be set near room temperature, and thus the heating operation of the mask member 16 as described above is required. Instead, the mask member 16 can be maintained at the second temperature. Therefore, the heating source for heating the mask member 16 may be omitted depending on the type of the source gas.
- a temperature sensor capable of detecting the temperature of the mask member 16 is attached to the mask member 16, and the temperature of the mask member 16 is monitored based on the output of the temperature sensor, which is a predetermined temperature higher than the second temperature.
- the mask member 16 may be heated to the second temperature using a heating source such as the gas supply unit 13.
- the mask member 16 is disposed in the first space S1 of the chamber 10, but the present invention is not limited to this, and a standby chamber that can wait for the mask member 16 is, for example, a first chamber. It may be provided adjacent to the space S1. In this case, a heating source capable of heating the mask member 16 to the second temperature may be installed in the standby chamber.
- the curing process of the liquid film L1 is performed in the first space part S1, but the curing process is performed, for example, in a curing process chamber disposed adjacent to the first space part S1. It may be broken.
- the mask member 16 may be arranged in the curing processing chamber, and may be configured such that the liquid film L1 is further patterned by the mask member 16 in the curing processing chamber.
- the ultraviolet ray curable resin has been described as an example of the energy ray curable resin.
- the resin material may be used.
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Abstract
Description
エネルギ線硬化樹脂を含み上記第1の温度以下で液化可能な原料ガスが、ガス供給部から上記基板の表面に供給される。
上記第1の温度よりも高い第2の温度に維持され所定の開口パターンを有するマスク部材が、上記基板の表面に対向して配置される。
上記基板の表面にエネルギ線が照射される。
あるいは、マスク部材にヒータを内蔵したり、マスク部材を抵抗加熱体で構成したりするなど、マスク部材を自己発熱させて上記第2の温度に維持させるようにしてもよい。
さらに、上記第2の温度が室温付近の場合は、上記第1の温度に冷却された基板にマスク部材が接触しないように相互の位置関係を設定することで、マスク部材を上記第2の温度に維持するようにしてもよい。
あるいは、上記マスク部材を配置する工程は、上記マスク部材を上記基板の表面から第1の距離だけ離間した位置から、上記マスク部材を上記基板の表面から上記第1の距離よりも短い第2の距離だけ離間した位置へ移動させることを含んでもよい。
なお、上記第2の距離は、ゼロであってもよい。
この場合、上記ガス供給部は、上記チャンバの内部に配置され上記加熱源を有するシャワーヘッドで構成されてもよく、上記マスク部材は、上記シャワーヘッドからの輻射熱または熱伝導で加熱されてもよい。
上記チャンバは、減圧雰囲気を維持することが可能に構成される。
上記ステージは、基板を支持するための支持面と、上記支持面を第1の温度以下に冷却することが可能な冷却源とを有し、上記チャンバの内部に配置される。
上記ガス供給部は、上記ステージに対向して配置され、エネルギ線硬化樹脂を含み上記第1の温度以下で液化可能な原料ガスを上記支持面上の基板へ供給することが可能に構成される。
上記マスク部材は、上記第1の温度よりも高い第2の温度を維持可能であり、所定の開口パターンを有し、上記支持面に対向して配置される。
上記照射源は、上記エネルギ線硬化樹脂を硬化させるためのエネルギ線を上記支持面に向けて照射することが可能に構成される。
なお図において、X軸、Y軸及びZ軸は相互に直交する3軸方向をそれぞれ示し、X軸及びY軸は水平方向、Z軸は高さ方向にそれぞれ相当する。
本実施形態の成膜装置1は、チャンバ10と、ガス供給部13と、照射源14と、ステージ15と、マスク部材16とを有する。
チャンバ10は、第1のチャンバ本体11と第2のチャンバ本体12との分割構造を有する。第1のチャンバ本体11及び第2のチャンバ本体12は、XY平面に平行な隔壁101(ガス供給部13)を挟んで相互に接続されており、これにより、第1のチャンバ本体11の内部には第1の空間部S1が、第2のチャンバ本体12の内部には第2の空間部S2がそれぞれ区画される。
一方、第2の空間部S2は、大気圧に維持されており、その内部には、後述する照射源14が配置されている。
ステージ15は、チャンバ10の第1の空間部S1に設置される。ステージ15は、基板Wを支持することが可能な支持面151を有し、本実施形態では、支持面151は、隔壁101に対向するようにXY平面に平行に形成される。支持面151は、基板Wよりも大きな面積を有し、その形状は特に限定されず、円形であってもよいし、矩形であってもよい。
ガス供給部13は、隔壁101と一体的に形成されたガスヘッド状の構造を有する。ガス供給部13の全体は、紫外線を透過させることが可能な材料(例えば石英ガラス)で構成される。
なお、加熱部132は、後述するようにマスク部材16をその全面にわたって上記第2の温度に加熱する加熱源としての機能をも有する。
照射源14は、チャンバ10の第2の空間部S2に配置され、隔壁101(ガス供給部13)を介してステージ15の支持面151に向けて紫外線を照射することが可能に構成される。照射源14は、例えば複数本の紫外線ランプ等で構成された紫外線光源を有する。
マスク部材16は、チャンバ10の第1の空間部S1に配置されており、本実施形態では、図示しないマスク移動機構によって、支持面151上の基板Wに対して、X軸方向、Y軸方向、Z軸方向、Z軸まわりの回転方向(θ方向)に沿って移動可能に構成される。
あるいは、マスク部材16は抵抗加熱線等の発熱体を備えていてもよいし、マスク部材16が発熱体で構成されていてもよい。この場合は、通電によりマスク部材16自体を発熱させることが可能となるため、マスク部材16を長期にわたって所定温度に維持することができる。
なお、基板Wへの紫外線照射時、マスク部材16は、基板Wを被覆しない位置に移動していてもよい。
なお、上記第1の位置は、ガス供給部13の底面にマスク部材16が接触する位置であってもよい。この場合、マスク部材16は、ガス供給部13の加熱部132からの熱伝導によって、上記第2の温度に加熱されることが可能となる。
なお、上記対向距離はゼロであってもよい。この場合、マスク部材16と基板Wとは相互に接触することになる。
以下、以上のように構成される成膜装置1を用いた成膜方法について説明する。
図3A~Cは、本実施形態に係る成膜方法の一例を示す成膜装置1の要部の概略側断面図である。
図4に示すように、原料ガスGが凝縮可能な温度に冷却された基板Wの表面にマスク部材Mを直接設けると、マスク部材Mも同様に冷却されるため、基板Wの表面だけでなく、マスク部材Mの表面にも原料ガスGの凝縮液からなる液膜L1が形成されることになる。
したがって、その後の紫外線照射によってマスク部材M上に原料ガス中のエネルギ線硬化樹脂が着膜することになる。このような現象の繰り返しによりマスク部材Mへの着膜量が増加すると、マスク精度(開口部の形状精度)が低下したり、パーティクルが発生したりして、所望とする膜質及びパターン形状を有する樹脂層を安定に形成することが困難になるという問題がある。
図5は、本実施形態に係る成膜方法の他の例を示す成膜装置1の要部の概略側断面図である。
あるいは、マスク部材16が発熱体を備える場合には、マスク部材16を基板Wの表面に対向して配置する前に、上記発熱体によってマスク部材16を上記第2の温度に加熱するようにしてもよい。
図6A~Cは、本実施形態に係る成膜方法のさらに他の例を示す成膜装置1の要部の概略側断面図である。
あるいは、マスク部材16が発熱体を備える場合には、マスク部材16を基板Wの表面に対向して配置する前に、上記発熱体によってマスク部材16を上記第2の温度に加熱するようにしてもよい。
10…チャンバ
13…ガス供給部
14…照射源
15…ステージ
16…マスク部材
G…原料ガス
L1…液膜
L2…樹脂層
W…基板
Claims (8)
- 減圧雰囲気に維持されたチャンバ内で、基板を第1の温度以下に冷却し、
エネルギ線硬化樹脂を含み前記第1の温度以下で液化可能な原料ガスを、ガス供給部から前記基板の表面に供給し、
前記第1の温度よりも高い第2の温度に維持され所定の開口パターンを有するマスク部材を、前記基板の表面に対向して配置し、
前記基板の表面にエネルギ線を照射する
成膜方法。 - 請求項1に記載の成膜方法であって、
前記マスク部材を配置する工程は、前記原料ガスを前記基板の表面に供給することで前記基板の表面に前記エネルギ線硬化樹脂を含む液膜を形成した後、前記マスク部材を前記基板の表面に近接させる
成膜方法。 - 請求項1に記載の成膜方法であって、
前記原料ガスを供給する工程は、前記マスク部材を前記基板の表面から離間した位置に配置した後、前記開口パターンを通して前記原料ガスを前記基板の表面に供給する
成膜方法。 - 請求項1に記載の成膜方法であって、
前記マスク部材を配置する工程は、前記マスク部材を前記基板の表面から第1の距離だけ離間した位置から、前記マスク部材を前記基板の表面から前記第1の距離よりも短い第2の距離だけ離間した位置へ移動させることを含む
成膜方法。 - 請求項1~4のいずれか1つに記載の成膜方法であって、さらに、
前記マスク部材を前記基板の表面に対向して配置する前に、前記チャンバ内に設置された加熱源によって前記マスク部材を前記第2の温度に加熱する工程を有する
成膜方法。 - 請求項5に記載の成膜方法であって、
前記ガス供給部は、前記チャンバの内部に配置され前記加熱源を有するシャワーヘッドで構成され、
前記マスク部材は、前記シャワーヘッドからの輻射熱または熱伝導で加熱される
成膜方法。 - 請求項1~4のいずれか1つに記載の成膜方法であって、さらに、
前記マスク部材を前記基板の表面に対向して配置する前に、前記マスク部材が有する発熱体によって前記マスク部材を前記第2の温度に加熱する工程を有する
成膜方法。 - 減圧雰囲気を維持することが可能なチャンバと、
基板を支持するための支持面と、前記支持面を第1の温度以下に冷却することが可能な冷却源とを有し、前記チャンバの内部に配置されたステージと、
前記ステージに対向して配置され、エネルギ線硬化樹脂を含み前記第1の温度以下で液化可能な原料ガスを前記支持面上の基板へ供給することが可能なガス供給部と、
前記第1の温度よりも高い第2の温度を維持可能であり、所定の開口パターンを有し、前記支持面に対向して配置されたマスク部材と、
前記エネルギ線硬化樹脂を硬化させるためのエネルギ線を前記支持面に向けて照射することが可能な照射源と
を具備する成膜装置。
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