WO2010053125A1 - 成膜装置、成膜方法及び半導体装置 - Google Patents
成膜装置、成膜方法及び半導体装置 Download PDFInfo
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- WO2010053125A1 WO2010053125A1 PCT/JP2009/068912 JP2009068912W WO2010053125A1 WO 2010053125 A1 WO2010053125 A1 WO 2010053125A1 JP 2009068912 W JP2009068912 W JP 2009068912W WO 2010053125 A1 WO2010053125 A1 WO 2010053125A1
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- solvent vapor
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- coating
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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
- H01L21/0274—Photolithographic processes
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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
- H01L21/6715—Apparatus for applying a liquid, a resin, an ink or the like
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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
- B05D1/002—Processes for applying liquids or other fluent materials the substrate being rotated
- B05D1/005—Spin coating
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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
- G03F7/162—Coating on a rotating support, e.g. using a whirler or a spinner
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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
- H01L21/02104—Forming layers
- H01L21/02107—Forming insulating materials on a substrate
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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
- H01L21/67242—Apparatus for monitoring, sorting or marking
- H01L21/67253—Process monitoring, e.g. flow or thickness monitoring
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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
- B05D3/04—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 gases
- B05D3/0486—Operating the coating or treatment in a controlled atmosphere
Definitions
- the present invention relates to a film forming apparatus, a film forming method, and a semiconductor device, and, for example, a film forming apparatus and a film forming method for applying a material on an object to be coated to form a coated film, and further, the film forming apparatus or film forming method
- the present invention relates to a semiconductor device manufactured by the method.
- the film forming apparatus is used in a liquid phase film forming process in the manufacture of a semiconductor, a liquid crystal display or the like (see, for example, Patent Document 1).
- a coating film such as a resist or a protective film on a substrate such as a wafer
- film thickness uniformity of about 0.1 to 1.0 ⁇ m is required, and usually, the coating film Is formed by spin coating.
- the spin coating is a coating method in which a material is supplied to the center on a substrate, the substrate is rotated at high speed to spread the material on the substrate surface, and a coating film is formed on the substrate.
- the present invention has been made in view of the above, and an object thereof is film formation capable of realizing improvement of material utilization efficiency, reduction of environmental load and suppression of operation rate decrease while maintaining film thickness uniformity.
- An apparatus, a film forming method, and a semiconductor device are provided.
- a first feature according to the embodiment of the present invention is that, in a film forming apparatus, a stage on which an object to be coated is placed and a predetermined area on the object to be coated placed on the stage are coated with a material
- the solvent vapor generated by the air supply unit is applied to the application film forming the film, the air supply unit generating solvent vapor capable of dissolving the coating film, and the coating film on the application object placed on the stage.
- a second feature of the embodiment of the present invention is that the semiconductor device is manufactured by the above-described film forming apparatus.
- a film forming method comprising the steps of: applying a material to a predetermined region on an object to be coated to form a coating film;
- the solvent vapor is generated by adjusting the amount of the viscosity of the surface side portion of the coating film to be lower than the viscosity of the coating object side portion, and forming the solvent vapor on the coating object And b) spraying on the coated film.
- FIG.1 It is a schematic diagram which shows schematic structure of the film-forming apparatus which concerns on the 1st Embodiment of this invention. It is a top view which shows schematic structure of the film-forming apparatus shown in FIG. It is a flowchart which shows the flow of the film-forming process which the film-forming apparatus shown in FIG.1 and FIG.2 performs. It is explanatory drawing for demonstrating application
- FIG. 15 is a cross-sectional view taken along line A1-A1 of FIG.
- FIG. 15 is a cross-sectional view taken along line A2-A2 of FIG.
- FIG. 18 is a cross-sectional view taken along line A3-A3 of FIG.
- It is sectional drawing which shows schematic structure of the spraying part with which the film-forming apparatus which concerns on the 4th Embodiment of this invention is equipped.
- It is a top view which shows schematic structure of the film-forming apparatus which concerns on the 5th Embodiment of this invention.
- FIG. 23 is an explanatory view for explaining a dried film after the liquid film shown in FIG. 22 has been subjected to a drying process. It is a top view which shows schematic structure of the film-forming apparatus based on the 6th Embodiment of this invention. It is a top view which shows the blower outlet of the spraying part with which the film-forming apparatus shown in FIG. 24 is provided.
- FIG. 28 It is sectional drawing which shows schematic structure of the spraying part with which the film-forming apparatus which concerns on the 7th Embodiment of this invention is equipped. It is explanatory drawing for demonstrating the liquid film after the film thickness flattening process which used the adjustment mechanism of a mechanical blocking plate in the outer peripheral part of a blower outlet. It is a block diagram which shows schematic structure of the film-forming system which concerns on the 8th Embodiment of this invention. It is a flowchart which shows the flow of the film-forming process which the film-forming system shown in FIG. 28 performs.
- a film forming apparatus 1 includes a stage 2 on which a wafer W as an application target is placed, and a rotation for rotating the stage 2 in a horizontal plane.
- Mechanism 3 coating unit 4 that applies material to wafer W on stage 2 to form coating film M, and air supply unit 5 that generates solvent vapor (vaporized solvent) that can dissolve coating film M
- a spray unit 6 for spraying the solvent vapor onto the coating film M on the wafer W
- a moving mechanism 7 for relatively moving the wafer W on the stage 2 and the coating unit 4 and the spray unit 6, and exhaust for exhausting the solvent vapor.
- the control unit 9 includes a unit 8 and a control unit 9 that controls each unit.
- the stage 2 is formed in a circular shape, and is configured to be rotatable in a horizontal plane by the rotation mechanism 3.
- the stage 2 is provided with a suction mechanism for suctioning the mounted wafer W, and the wafer W is fixed and held on the upper surface of the stage by the suction mechanism.
- this suction mechanism for example, an air suction mechanism or the like is used.
- the stage 2 is provided with a plurality of supportable support pins for supporting the wafer W. When delivery of the wafer W is performed by a transfer robot arm or the like, the wafer W is supported by the support pins.
- the rotation mechanism 3 rotatably supports the stage 2 in a horizontal plane, and rotates the stage 2 in a horizontal plane by a drive source such as a motor with the center of the stage as a rotation center. Thus, the wafer W placed on the stage 2 is rotated in the horizontal plane.
- the coating unit 4 is a coating nozzle that discharges a material to be the coating film M.
- the coating unit 4 continuously discharges the material from the tip portion at a predetermined pressure and applies the material onto the wafer W on the stage 2.
- a tank 4a for storing material is connected to the application unit 4 via a supply pipe 4b such as a tube or a pipe.
- a regulating valve 4c is provided in the supply pipe 4b.
- the adjustment valve 4 c is electrically connected to the control unit 9, and adjusts the discharge amount of the material from the application unit 4 according to the control by the control unit 9.
- the air supply unit 5 includes a solvent vapor generating unit 5a that generates solvent vapor, a transfer pipe 5b that communicates the solvent vapor generating unit 5a and the spray unit 6, and a transfer pipe 5b that transfers the generated solvent vapor to the spray unit 6.
- a transport gas supply unit 5c supplies transport gas for transport via the solvent vapor generation unit 5a, and a supply pipe 5d communicates the solvent vapor generation unit 5a with the transport gas supply unit 5c.
- the solvent vapor generating unit 5 a includes a tank 11 for storing the solvent, a heater 12 for generating the solvent vapor, and a temperature sensor 13 for measuring the temperature of the solvent vapor in the tank 11.
- the heater 12 and the temperature sensor 13 are electrically connected to the controller 9, and the controller 9 controls the temperature of the heater 12 to vaporize the solvent in the tank 11 based on the temperature measured by the temperature sensor 13. Adjust the
- the transport pipe 5 b is a transport flow path for connecting the solvent vapor generating unit 5 a and the spraying unit 6 and transporting the solvent vapor from the solvent vapor generating unit 5 a to the spraying unit 6.
- a tube or a pipe is used as the transport pipe 5b.
- the transfer pipe 5b is provided with a heater 14 for supplying heat.
- a sheet-like heater is used as the heater 14 and is wound around the outer peripheral surface of the transport pipe 5b.
- the heater 14 is electrically connected to the control unit 9, and is adjusted by the control unit 9 so that the temperature of the transport pipe 5b is higher than the dew point temperature of the solvent.
- the temperature of the transfer pipe 5b is lower than the dew point temperature of the solvent, the vaporized solvent in the transfer gas condenses, making it difficult to obtain a desired amount of solvent vapor, but the temperature of the transfer pipe 5b becomes difficult. Is adjusted by the heater 14 and maintained in a temperature range in which the solvent vapor in the transfer pipe 5b does not condense.
- the carrier gas supply unit 5c is a supply unit that stores the carrier gas and supplies the carrier gas to the solvent vapor generation unit 5a.
- the solvent vapor generated in the solvent vapor generating unit 5 a is conveyed to the spray unit 6 and blown out by the carrier gas.
- the carrier gas for example, an inert gas such as nitrogen or air is used.
- the supply pipe 5d is a supply flow path for connecting the carrier gas supply unit 5c and the solvent vapor generation unit 5a and supplying the carrier gas from the carrier gas supply unit 5c to the solvent vapor generation unit 5a.
- a tube or a pipe is used as the supply pipe 5d.
- the supply pipe 5d is provided with a control valve 15 for adjusting the flow rate of the carrier gas.
- the adjusting valve 15 is electrically connected to the control unit 9, and adjusts the flow rate of the carrier gas from the carrier gas supply unit 5 c according to the control by the controller 9.
- the spraying unit 6 is a blowout head for blowing out the solvent vapor transported from the solvent vapor generating unit 5a through the transport pipe 5b, and is an air knife type air supply unit.
- the spray unit 6 is formed in a box shape having a slit (elongated gap) -like outlet H1.
- a heater 16 that supplies heat is provided on the side surface of the spray unit 6.
- a sheet-like heater is used as the heater 16 and is attached to the outer peripheral surface of the blowing unit 6.
- the heater 16 is electrically connected to the control unit 9 and is adjusted by the control unit 9 so that the temperature of the spray unit 6 becomes higher than the dew point temperature of the solvent.
- the temperature of the spray unit 6 is adjusted by the heater 16, and the temperature of the solvent vapor in the spray unit 6 is maintained within a temperature range that does not cause condensation.
- the moving mechanism 7 supports a coating unit 4 and moves it in the Z-axis direction.
- a Z-axis moving mechanism 7a supports the blowing unit 6 and moves it in the Z-axis direction.
- a moving mechanism 7b and a pair of X-axis moving mechanisms 7c and 7d for respectively moving the Z-axis moving mechanisms 7a and 7b in the X-axis direction are provided.
- a linear motor moving mechanism using a linear motor as a driving source or a feed screw moving mechanism using a motor as a driving source is used as each Z-axis moving mechanism 7a, 7b and the pair of X-axis moving mechanisms 7c, 7d.
- the pair of X-axis moving mechanisms 7c and 7d are moving mechanisms that respectively move the application unit 4 and the spray unit 6 in the X-axis direction via the Z-axis moving mechanisms 7a and 7b.
- the coating unit 4 is moved in the X-axis direction from the center to the outer periphery of the stage 2 by the X-axis moving mechanism 7d, and the spraying unit 6 is X over the entire surface of the stage 2 by the pair of X-axis moving mechanisms 7c and 7d. Move in the axial direction.
- the Z-axis moving mechanism 7b is provided with a height sensor 17 such as a reflective laser distance sensor.
- the height sensor 17 moves in the X-axis direction together with the Z-axis moving mechanism 7b by the pair of X-axis moving mechanisms 7c and 7d to measure the waviness, surface roughness, etc. of the coated surface of the wafer W. Thereby, the height profile of the application surface of the wafer W is acquired.
- the exhaust unit 8 is an exhaust head for exhausting the solvent vapor blown out from the spray unit 6 which stands by at a standby position not facing the stage 2.
- the exhaust unit 8 continuously sucks and exhausts the solvent vapor by a predetermined suction force.
- a pump 8 a that generates a predetermined suction force is connected to the exhaust unit 8 via an exhaust pipe 8 b such as a tube or a pipe.
- the pump 8 a is electrically connected to the control unit 9 and is driven according to the control of the control unit 9.
- the control unit 9 includes a microcomputer that centrally controls each unit, and a storage unit that stores various programs, various information, and the like.
- a memory, a hard disk drive (HDD) or the like is used as the storage unit.
- the control unit 9 controls the rotation of the stage 2, the movement of the application unit 4, the movement of the spray unit 6, and the like based on various programs.
- the relative position between the wafer W on the stage 2 and the coating unit 4 and the relative position between the wafer W on the stage 2 and the spray unit 6 can be changed variously.
- the control unit 9 of the film forming apparatus 1 executes the film forming process based on various programs. Note that the film formation process is performed in a state where the wafer W is adsorbed and fixed on the stage 2.
- step S1 gap adjustment is performed (step S1), and then application by the application unit 4 is performed (step S2). Thereafter, temporary drying is performed (step S3), the film thickness flattening process is performed by the blowing unit 6 (step S4), and the process ends.
- step S1 the height sensor 17 is moved in the X axis direction together with the Z axis moving mechanism 7b by the pair of X axis moving mechanisms 7c and 7d, and the waviness and surface roughness of the coated surface of the wafer W on the stage 2 Measure etc. That is, the height profile is acquired and stored in the storage unit of the control unit 9.
- the height profile described above is used, and in order to adjust the distance in the vertical direction between the coating unit 4 and the coating surface of the wafer W (hereinafter simply referred to as a gap) to a set value, for example, an average value and a set value A difference is obtained to calculate a correction amount, and the application unit 4 is moved in the Z-axis direction by the Z-axis moving mechanism 7a by the correction amount.
- the gap between the coating unit 4 and the coating surface of the wafer W is adjusted to the desired gap.
- the gap adjustment is performed only for the first time, and is omitted thereafter.
- step S2 the coating unit 4 and the Z-axis moving mechanism 7a are rotated by the X-axis moving mechanism 7d while the stage 2 is rotated by the rotation mechanism 3, ie from the center of the wafer W It moves gradually towards the outer circumference.
- the coating unit 4 continuously discharges the material onto the coated surface of the wafer W while moving, and further controls the discharge amount in accordance with the peripheral speed to make the material in a spiral pattern on the coated surface. Apply (spiral application).
- the coating film M is formed on the coated surface of the wafer W.
- a coating nozzle is used as the coating unit 4, the present invention is not limited to this.
- a jetting head 4A such as an inkjet head that jets a material as a plurality of droplets is used. May be The jet head 4A is formed to be movable in the Y-axis direction in addition to the X-axis direction. As a result, while the relative position between the jet head 4A and the wafer W is changed, a plurality of droplets are jetted from the jet head 4A and coated on the coated surface of the wafer W (dot coating).
- the ejection amount, the application pitch, and the droplet amount are optimized, the droplets on the wafer W are connected, and the application film M of the material is formed on the application surface of the wafer W.
- the ejection head 4A such as the inkjet head is used, the coating can be efficiently performed by performing the ejection while rotating the stage 2 by the rotation mechanism 3.
- the stage 2 rotates at a predetermined speed for a predetermined time, and the drying of the coating film M is promoted.
- the drying of the outer edge portion of the coating film M is promoted, and the spread of the coating film M is suppressed.
- temporary drying can be omitted.
- step S4 the spraying unit 6 is moved by the pair of X axis moving mechanisms 7c and 7d together with the Z axis moving mechanism 7b over the entire surface of the wafer W on the stage 2. Move in the direction. At this time, the spray unit 6 sprays solvent vapor continuously on the coating film M on the wafer W while moving in the X-axis direction, and dissolves the surface layer of the coating film M.
- the control unit 9 controls the amount of spray (supply amount) of the solvent vapor so as to decrease the viscosity of the surface layer of the coating film M.
- the adjustment of the spray amount of the solvent vapor is performed by adjusting the flow rate of the carrier gas by the control valve 15, changing the temperature setting of the solvent vapor generating portion 5a, or both.
- the control of the number of rotations of the rotation mechanism 3 by the control unit 9 can also adjust the blowing amount.
- the coating film M not only the surface layer but also the vicinity of the surface layer or only the surface layer can be used to reduce the viscosity. Further, the viscosity on the wafer W side (stage side) of the coating film M is controlled not to be lower than the viscosity on the surface side.
- coating pitch unevenness Ma by spiral coating or dot coating and a crown Mb generated at the time of drying are present in the coating film M, but in the film thickness flattening process, solvent vapor is present.
- the viscosity of the surface layer of the coating film M is reduced, the coating pitch unevenness Ma and the crown Mb are suppressed and thus reduced, and the variation of the coating film M is reduced. That is, although the film thickness uniformity is lowered by the spiral coating and the dot coating, since the variation of the coating film M is reduced by the film thickness flattening process, the film thickness uniformity equal to or greater than that of the spin coating can be obtained. it can.
- the flattening time T is T ⁇ 4 / ⁇ h 3 ( ⁇ : viscosity, ⁇ : wavelength, ⁇ : surface tension, h (Average thickness) and proportional to the viscosity ⁇ of the material. Therefore, when the surface layer of the coating film M is dissolved and the viscosity is reduced by spraying solvent vapor on the surface of the coating film M, the planarization time T is shortened and the planarization of the coating film M is promoted. In particular, even when the surface tension ⁇ of the material to be applied is high, it is possible to promote the planarization of the applied film M by reducing the viscosity of the surface by spraying solvent vapor on the surface of the applied film M.
- the stage 2 is rotated at the same time as the blowing unit 6 and the wafer W are relatively relatively moved by the pair of X-axis moving mechanisms 7c and 7d. Control may be performed.
- the surface layer of the coating film M having a reduced viscosity is likely to be flat due to the centrifugal force, so that the planarization time is shortened and the planarization effect is further promoted.
- the spray unit 6 stands by at a standby position not facing the stage 2.
- the solvent vapor blown out from the spray unit 6 waiting at this standby position is exhausted by the exhaust unit 8.
- the spraying part 6 is controlled so that a solvent vapor may always be blown out here. As described above, by performing control such that the solvent vapor is always supplied to each part, the temperature stabilization of the solvent vapor and the stabilization of the solvent vapor amount can be realized.
- step S4 the film thickness flattening process in step S4 will be described in more detail with reference to FIGS. 8 to 12.
- the shape of the coating film M made into the objective it is desirable to supply a solvent vapor
- the application unit 4 discharges the material continuously onto the application surface of the wafer W while moving, and applies a spiral pattern on the application surface (spiral application).
- the liquid film at this time is shown in FIG.
- the film thickness flattening process is performed, the viscosity distribution of the liquid film shown in FIG. 9 is obtained.
- the viscosity of the surface layer of the liquid film is reduced by the solvent vapor, and the unevenness of the surface formed at the time of application is alleviated.
- the state which made this dry film Ma after drying (baking) is shown in FIG.
- a protrusion ⁇ L1 (so-called crown) is generated on the peripheral portion.
- the film thickness variation ⁇ S1 caused by the unevenness at the time of application exists in a portion other than the peripheral portion (inside the peripheral portion).
- ⁇ L1 is the distance from the average film thickness to the highest part of the protrusion
- ⁇ S1 is a range of unevenness other than the peripheral part (inside of the peripheral part).
- FIG. 9 is a figure explaining the outline
- the surface layer is a layer on the surface, and is a portion where there is an uneven portion. It is at least necessary to lower the viscosity of this surface layer.
- ⁇ L1 and ⁇ S1 are in a trade-off relationship. That is, in order to further improve the flatness of portions other than the peripheral portion (inside the peripheral portion), the solvent vapor amount may be increased as a whole. However, as the amount of solvent vapor is increased, the height of the peripheral protrusions increases. As shown in FIG. 11, the viscosity of the liquid film is significantly reduced (extremely low), and the flatness other than the peripheral edge (inner side of the peripheral edge) is good, but the shape of the peripheral edge is rounded and changed gently. I will. If drying (baking) is performed in this state, the solid content will flow into the peripheral portion and be dried there because of the good fluidity of the liquid. Then, as shown in FIG. 12, the protrusion of the peripheral portion becomes a dry film Ma having a high shape ( ⁇ S2 ⁇ S1, ⁇ L2> ⁇ L1).
- the peripheral portion is a portion where a change in the film shape that occurs when the coating film M of the wafer W is dried appears, and a portion where a portion where ⁇ L 1 occurs is viewed from above.
- the width of the portion where ⁇ L1 to ⁇ L3 is generated is about 2 nm from the peripheral portion of the coating film M, but varies depending on the coating material, the solvent, and the like.
- the amount of spray (supply amount) of the solvent vapor is controlled to be an amount to reduce the viscosity of the surface layer of the coating film M.
- the viscosity distribution of the coating film M is important to change the viscosity distribution of the coating film M.
- the viscosity on the wafer W side (stage side) of the coating film M it is possible to prevent the protrusion on the peripheral edge from becoming high.
- the viscosity on the wafer W side (stage side) as low as possible and lowering the viscosity on the surface side, projections can be suppressed and planarization can be realized.
- adjustment of the spray amount of the solvent vapor can be performed by adjusting the flow rate of the carrier gas by the adjustment valve 15, changing the temperature setting of the solvent vapor generating portion 5a, or both of them. It will be.
- the control of the number of rotations of the rotation mechanism 3 by the control unit 9 can also adjust the blowing amount.
- the viscosity on the surface layer side of the coating film M is reduced by spraying the solvent vapor, the viscosity of the coating film M is reduced to 60% of the thickness of the coating film M, so that the protrusion of the peripheral portion becomes high. It can prevent. Furthermore, it is most preferable to reduce the viscosity to 30% of the thickness of the coating film M from the surface.
- the viscosity distribution of the coating film M on the wafer W by spraying solvent vapor, it is possible to suppress the change in the film shape generated on the wafer W.
- the viscosity of portions other than the peripheral portion (inner side of the peripheral portion) of the coating film M it is possible to suppress the change in the film shape generated on the peripheral portion of the wafer W.
- control unit 9 performs control to spray the solvent vapor only on the predetermined region.
- the concavo-convex pattern of the film surface by the spiral coating is approximately symmetrical in the rotational direction (the amplitude and the pitch of the concavo-convex are the same regardless of the radius). Therefore, even under the same conditions in the film thickness planarization process, the entire surface of the coated film M on the wafer W can be made more uniform by the film thickness planarization process, as compared with other coating methods. is there.
- the solvent vapor is generated and sprayed to the coating film M on the wafer W, whereby the viscosity of the surface layer of the coating film M is reduced, and spiral coating is performed. Since coating pitch unevenness Ma and crown Mb by coating and dot coating become smaller and dispersion of coating film M becomes smaller, even when using coating methods other than spin coating such as spiral coating and dot coating, the film thickness uniformity is maintained be able to. As a result, it becomes possible to use a coating method such as spiral coating or dot coating, so that the material can be coated only on a predetermined area of the coated surface of the wafer W compared to spin coating.
- the amount of the solvent vapor to be sprayed so as to decrease the viscosity of the surface layer of the coating film M
- the viscosity of the surface layer of the coating film M decreases, and the drying time for drying the coating film M is shortened. Manufacturing time can be shortened.
- the viscosity distribution of the coating film M on the wafer W by spraying solvent vapor, it is possible to suppress the change in the film shape generated on the wafer W.
- the viscosity of the portion other than the peripheral portion (inside the peripheral portion) it is possible to suppress the change in the film shape generated on the peripheral portion of the wafer W.
- control unit 9 performs control to spray the solvent vapor only on the predetermined region.
- the dispersion of the coating film M becomes smaller due to the centrifugal force due to the rotation.
- the film thickness uniformity of the coating film M can be improved.
- the coating film M on the wafer W by drying, the coating film M is dried to a certain extent in the drying step, and the flowability of the coating film M is suppressed. It is possible to suppress the change in the film shape generated at the peripheral portion of the wafer W in the hardening process.
- the drying means in the above-mentioned temporary drying although the wafer W is rotated by the rotation mechanism 3 as the drying unit, the present invention is not limited thereto.
- the wafer W may be dried by using a spray mechanism.
- the gas may be blown, or the wafer W may be heated by a baking furnace, or the wafer W may be heated by providing a heating means on the stage 2.
- the coating unit 4 and the stage 2 The drying air supply head or the drying lamp may be provided at a position where the distance from the rotation shaft is equal.
- an exhaust unit 21 capable of uniform exhaust may be used.
- the exhaust unit 21 includes a housing 22 that covers the stage 2 and a dispersion plate 23 provided in the housing 22.
- the dispersion plate 23 has a plurality of through holes 23a through which air passes, and makes the exhaust gas uniform.
- the upper part of the housing 22 is connected to the factory exhaust system, and the air flows from the lower part of the housing 22 upward through the dispersion plate 23 and is exhausted from the upper part of the housing 22. Thereby, the coating film M on the wafer W can be uniformly dried.
- the second embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the second embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the blowing unit 6 is an air knife type air supply and discharge unit, and is supplied by a rectangular parallelepiped housing 31 and an air supply unit 5.
- the blowout port H1 which blows off the solvent vapor
- the exhaust port H2 which is provided around the blowout port H1 and exhausts the excess solvent vapor blown out from the blowout port H1.
- the housing 31 is formed in a rectangular parallelepiped shape by combining three block bodies 31a, 31b, and 31c. Each block body 31a, 31b, 31c is fixed by a fastening member such as a bolt.
- the blowout opening H1 is formed in a slit (long and narrow gap) shape on the lower surface (in FIGS. 15 and 16) of the housing 31 and is discharged to two inlets H3 formed in a circular shape on the side surface of the housing 31. It is connected via the flow path F1.
- the blowout flow path F1 is formed in a slit shape long in the direction perpendicular to the direction in which the solvent vapor flows, and is a flow path connecting one blowout port H1 and the two inflow ports H3.
- Each of the inlets H3 is connected to the transport pipe 5b.
- the air outlet H2 is formed between the air outlet H1 and the air outlet H1 in the lower surface of the housing 31 (in FIGS. 15 and 16), and two air outlets H2 are formed in the shape of a slit. It is connected via the exhaust flow path F2 to the circular outlet H4.
- the exhaust flow path F2 is formed in a slit shape with two blowout flow paths F1 in between, and each exhaust flow path F2 is a flow path which connects one exhaust port H2 and one outlet H4. .
- An exhaust pipe is connected to the outlet H4.
- Such a spray unit 6 has an exhaust function of exhausting an excess of solvent vapor in addition to an air supply function of spraying and supplying the solvent vapor, and has a structure in which the air supply and exhaust are integrated. Therefore, when the solvent vapor is supplied to the coating film M, the excess solvent vapor is not scattered into the apparatus by optimizing the balance of the air supply and exhaust, and the apparatus can be prevented from being contaminated.
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor.
- the same effect as that of the first embodiment can be obtained. Furthermore, by disposing the exhaust port H2 around the blowout port H1 for supplying the solvent vapor, it becomes easy to optimize the supplied amount and the exhaust amount of the solvent vapor. This makes it possible to supply the solvent vapor only to a narrow range immediately below the outlet H1, so that excess solvent vapor is not scattered in the apparatus, and contamination of the apparatus can be prevented. .
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor.
- the viscosity on the wafer W side (stage side) of the coating film M can be controlled not to be lower than the viscosity on the surface side. Therefore, it can prevent that the euros
- the third embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the third embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the blowing unit 6 is a nozzle type air supply and discharge unit, and is supplied by a cylindrical case 41 and the air supply unit 5.
- the blowout port H1 which blows off the solvent vapor
- the exhaust port H2 which is provided around the blowout port H1 and exhausts the excess solvent vapor blown out from the blowout port H1.
- the housing 41 is formed in the same size as the coating nozzle of the coating unit 4.
- the blowout opening H1 is formed in a circular shape on the lower surface (in FIG. 18) of the housing 41, and the blowout passage in one inlet H3 formed in a circular shape on the upper surface (in FIG. 18) of the housing 41. Connected via F1.
- the blowout flow path F1 is formed in a cylindrical shape, and is a flow path that communicates one blowout port H1 with one inflow port H3.
- the transfer pipe 5b is connected to the inflow port H3.
- the exhaust port H2 is formed in an annular shape with the blowout port H1 in between, and is connected to the two outlets H4 formed in a circular shape on the side surface of the housing 41 via the exhaust flow path F2.
- the exhaust flow path F2 is a flow path which connects one exhaust port H2 and two outlet H4.
- An exhaust pipe 42 is connected to each of the outlets H4.
- Such a spray unit 6 has an exhaust function of exhausting an excess of solvent vapor in addition to an air supply function of spraying and supplying the solvent vapor, and has a structure in which the air supply and exhaust are integrated. Therefore, when the solvent vapor is supplied to the coating film M, the excess solvent vapor is not scattered into the apparatus by optimizing the balance of the air supply and exhaust, and the apparatus can be prevented from being contaminated.
- the nozzle type spray unit 6 since the nozzle type spray unit 6 has a structure that can be miniaturized, it is in the vicinity of the application unit 4, that is, in the rotation direction at the same distance from the center of the stage 2 in the radial direction with the application nozzle of the application unit 4.
- the nozzle type sprayer 6 is disposed behind the coating nozzle, and solvent vapor is supplied from the sprayer 6 to the coating film M immediately after coating to simultaneously perform coating and film thickness flattening processing. As it can be done, simplification of the manufacturing process and shortening of the manufacturing time can be realized.
- the blowing unit 6 is moved in the X-axis direction along the entire surface of the wafer W on the stage 2 together with the Z-axis moving mechanism 7b by the pair of X-axis moving mechanisms 7c and 7d.
- the spray unit 6 sprays solvent vapor continuously on the coating film M on the wafer W while moving in the X-axis direction, and dissolves the surface layer of the coating film M.
- the control unit 9 controls the amount of spray (supply amount) of the solvent vapor so as to decrease the viscosity of the surface layer of the coating film M.
- the adjustment of the spray amount of the solvent vapor is performed by adjusting the flow rate of the carrier gas by the control valve 15, changing the temperature setting of the solvent vapor generating portion 5a, or both.
- the control of the number of rotations of the rotation mechanism 3 by the control unit 9 can also adjust the blowing amount.
- the controller 9 adjusts the amount of solvent vapor in accordance with the peripheral velocity at a certain radius from the center of the application object, and makes the spray amount per unit area constant, in accordance with the increase in the main velocity.
- the supply of solvent vapor is increased.
- the generation of the protrusion can be suppressed, and the film thickness uniformity can be improved.
- the control unit 9 controls the solvent vapor so as to be different between the peripheral portion of the coating film M and the inside of the peripheral portion by the control unit 9, the supply of the solvent vapor to the peripheral portion can be reduced, and the film thickness is uniform. It is possible to improve the quality.
- the viscosity on the wafer W side (stage side) of the coating film M can be controlled not to be lower than the viscosity on the surface side. Therefore, it can prevent that the euros
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor.
- the same effect as that of the first embodiment can be obtained. Furthermore, by disposing the exhaust port H2 around the blowout port H1 for supplying the solvent vapor, it becomes easy to optimize the supplied amount and the exhaust amount of the solvent vapor. This makes it possible to supply the solvent vapor only to a narrow range immediately below the outlet H1, so that excess solvent vapor is not scattered in the apparatus, and contamination of the apparatus can be prevented. .
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor.
- the fourth embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the fourth embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the spray unit 6 includes a housing 51 for covering the stage 2 and a dispersion plate 52 provided in the housing 51. There is. Further, the film forming apparatus 1 is provided with an exhaust unit 53 for exhausting the solvent vapor in an excess amount.
- the housing 51 has an outlet H1 of the same size as the wafer W.
- the dispersion plate 52 has a plurality of through holes 52a through which the solvent vapor passes, and makes the air supply uniform.
- the dispersion plate 52 functions as a dispersion unit.
- casing 22 is connected to the solvent vapor generation part 5a via the conveyance pipe 5b.
- the solvent vapor flows downward from above the housing 22 through the dispersion plate 52, and is uniformly supplied to the coating film M of the wafer W on the stage 2.
- distribution board 52 is used as a dispersion
- the exhaust unit 53 is an exhaust head for exhausting the solvent vapor of the surplus blown out from the spray unit 6, and is formed in an annular shape so as to surround the outer edge of the stage 2.
- the exhaust unit 53 sucks and discharges the solvent vapor continuously by a predetermined suction force.
- a pump for generating a predetermined suction force is connected to the exhaust unit 53 via an exhaust pipe such as a tube or a pipe.
- the pump is electrically connected to the control unit 9 and is driven according to the control of the control unit 9.
- Such a spray unit 6 has a blowout port H1 of the same size as the wafer W, and incorporates a dispersion plate 52 in which a plurality of through holes 52a are appropriately provided in order to equalize the supply amount in the plane. There is. As a result, the solvent vapor is dispersed and supplied to the coating film M on the wafer W, and the supply amount to the coating film M in the plane becomes uniform, so that the film thickness uniformity can be improved.
- the viscosity on the wafer W side (stage side) of the coating film M can be controlled not to be lower than the viscosity on the surface side. Therefore, it can prevent that the euros
- the excess solvent vapor does not scatter, and the flow of the solvent vapor on the wafer W is also rectified.
- the solvent vapor is supplied to the coating film M by optimizing the balance of the air supply and exhaust, it is possible to prevent the excess solvent vapor from being scattered in the apparatus and to prevent the apparatus from being contaminated.
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor from the outer edge.
- the wafer W may not be rotated in the horizontal plane.
- the dispersion of the coating film M is further reduced by the centrifugal force due to the rotation, in addition to the viscosity decrease by the solvent vapor. Therefore, the film thickness uniformity of the coating film M can be improved.
- the same effect as that of the first embodiment can be obtained. Furthermore, by dispersing and supplying the solvent vapor, the amount of supply to the coating film M in the surface becomes uniform, so that the film thickness uniformity can be improved. Further, by providing an annular exhaust portion 53 for exhausting the solvent vapor from the outer edge of the wafer W, the solvent vapor flowing out from the outer periphery of the wafer W is exhausted by the exhaust portion 53, and the supplied amount and exhaust amount of the solvent vapor As it is easy to optimize the system, it is possible to prevent the excess solvent vapor from being scattered in the apparatus and to prevent the apparatus from being contaminated.
- the viscosity distribution of the coating film M can be appropriately controlled by exhausting the excess solvent vapor from the outer edge.
- FIG. 20 Fifth Embodiment A fifth embodiment of the present invention will be described with reference to FIGS. 20 and 21.
- FIG. 20 is a diagrammatic representation of FIG. 20 and 21.
- the fifth embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the fifth embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the spray unit 6 includes two adjustment mechanisms 61 for adjusting the opening area of the slit-shaped outlet H1.
- the adjusting mechanism 61 is a slit length adjusting mechanism that changes the slit length of the blowout port H 1, and is provided at both ends in the longitudinal direction of the blowing unit 6. Thereby, the supply range of the solvent vapor to the wafer W can be varied. By changing the length of the slit, it is possible to control the spray amount of the solvent vapor to the edge portion of the wafer W.
- the mechanism for changing the length of the slit may be changed in conjunction with the control unit 9 or may be changed manually.
- the control unit 9 causes the spray unit 6 to spray solvent vapor while rotating the stage 2 by the rotation mechanism 3.
- the solvent vapor is transferred to the wafer W on the rotating stage 2 in a state where the spray unit 6 is fixed just above the diameter of the stage 2 without moving in the X axis direction. Supply.
- the blower outlet H1 is formed so that slit width may become large gradually toward the peripheral part from the center of the longitudinal direction.
- the amount of supplied solvent vapor gradually increases from the center of the wafer W toward the peripheral portion.
- the stage 2 is rotated.
- the circumferential velocity increases from the center to the peripheral portion, so the amount of solvent supplied per unit area is constant.
- it is necessary to increase the supply amount from the center to the periphery.
- An example is a shape in which the slit width gradually increases toward the peripheral edge.
- the thickness of the coating film M may be gradually thickened from the center toward the periphery due to the centrifugal force, the supply amount of the solvent vapor can also be changed according to the thickness.
- a slit length adjusting mechanism for changing the slit length is provided (adjusting mechanism 61).
- adjusting mechanism 61 the viscosity of the peripheral portion of the liquid film is maintained with substantially no reduction, and the viscosity of the portion other than the peripheral portion (inner side of the peripheral portion) is reduced to alleviate the unevenness.
- drying (baking) to be described later it is possible to obtain the dried film Ma of FIG. 23 in which the protrusion of the peripheral portion is suppressed and the flatness of the other portion (inner side of the peripheral portion) is improved ( ⁇ S3 ⁇ S1 , ⁇ L3 ⁇ ⁇ L1).
- the same effect as that of the first embodiment can be obtained.
- the supply range of the solvent vapor to the wafer W can be varied by providing the adjusting mechanism 61 for adjusting the opening area of the outlet H1. For example, even when the size of the wafer W is changed, it is possible to supply the solvent vapor only to the coating film M on the wafer W in accordance with the size, so excess solvent vapor is removed in the apparatus. It will not scatter and can prevent the contamination of the device.
- the adjusting mechanism 61 capable of adjusting the slit length, the viscosity of the peripheral portion of the liquid film is maintained with almost no reduction, and the peripheral shape is maintained, and the viscosity of other than the peripheral portion (inner side of the peripheral portion) is reduced. Unevenness is relieved.
- drying drying
- the supply mechanism of the solvent vapor can be varied by the adjusting mechanism 61.
- the viscosity on the wafer W side (stage side) of the coating film M can be controlled not to be lower than the viscosity on the surface side. Therefore, it can prevent that the euros
- FIG. 24 Sixth Embodiment The sixth embodiment of the present invention will be described with reference to FIGS. 24 and 25.
- the sixth embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the sixth embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the spray unit 6 includes one adjustment mechanism 61 that adjusts the opening area of the slit-shaped outlet H1.
- the adjustment mechanism 61 is a slit length adjustment mechanism that changes the slit length of the blowout port H1, and is provided at one end of the spray unit 6 in the longitudinal direction. Thereby, the supply range of the solvent vapor to the wafer W can be varied.
- the blowing unit 6 is formed to have a length about the radius of the stage 2 and is configured to be movable by one of the pair of X-axis moving mechanisms 7c and 7d.
- the control unit 9 causes the spray unit 6 to spray solvent vapor while rotating the stage 2 by the rotation mechanism 3.
- the solvent is applied to the entire surface of the wafer W on the rotating stage 2 in a state where the spray unit 6 is fixed just above the radius of the stage 2 without moving in the X axis direction. Supply steam.
- the blower outlet H1 is formed so that a slit width may become large gradually toward the peripheral part from the inner peripheral part of the longitudinal direction.
- the amount of supplied solvent vapor gradually increases from the center of the wafer W toward the peripheral portion.
- the stage 2 is rotated.
- the circumferential velocity increases from the center to the peripheral portion, so the amount of solvent supplied per unit area is constant. In order to achieve this, it is necessary to increase the amount of supply toward the periphery.
- An example is a shape in which the slit width gradually increases toward the peripheral edge.
- the thickness of the coating film M may be gradually thickened from the center toward the periphery due to the centrifugal force, the supply amount of the solvent vapor can also be changed according to the thickness.
- the amount of solvent vapor supplied is the same as that described in the fifth embodiment.
- the mechanism for changing the length of the slit may be changed in conjunction with the control unit 9, or may be changed manually.
- the same effect as that of the first embodiment can be obtained.
- the supply range of the solvent vapor to the wafer W can be varied by providing the adjusting mechanism 61 for adjusting the opening area of the outlet H1. For example, even when the size of the wafer W is changed, it is possible to supply the solvent vapor only to the coating film M on the wafer W in accordance with the size, so excess solvent vapor is removed in the apparatus. It will not scatter and can prevent the contamination of the device. Further, by providing the adjusting mechanism 61 capable of adjusting the slit length, the same effect as that of the fifth embodiment can be obtained.
- FIG. 26 Seventh Embodiment The seventh embodiment of the present invention will be described with reference to FIGS. 26 and 27.
- the seventh embodiment of the present invention is a modification of the first embodiment. Therefore, in particular, a portion different from the first embodiment, that is, the spray portion 6 will be described. In the seventh embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- the spray unit 6 includes a case 71 for covering the stage 2, a dispersion plate 72 provided in the case 71, and the case It has one adjustment mechanism 73 provided on the outer peripheral surface of the body 71 and adjusting the opening area of the circular outlet H1.
- the housing 71 has an outlet H1 of the same size as the wafer W.
- the dispersion plate 72 has a plurality of through holes 72a through which solvent vapor passes, and makes the air supply uniform.
- the dispersion plate 52 functions as a dispersion unit.
- casing 71 is connected to the solvent vapor generation part 5a via the conveyance pipe 5b.
- the solvent vapor flows downward from above the housing 71 through the dispersion plate 72, and is uniformly supplied to the coating film M of the wafer W on the stage 2.
- distribution board 52 is used as a dispersion
- the adjusting mechanism 73 is a diameter adjusting mechanism that changes the diameter of the air outlet H1, and is provided on the outer peripheral surface of the blowing unit 6 so as to cover the outer peripheral portion of the air outlet H1. Thereby, the supply range of the solvent vapor to the wafer W can be varied.
- the control unit 9 causes the spray unit 6 to spray solvent vapor while rotating the stage 2 by the rotation mechanism 3.
- the spray unit 6 supplies the solvent vapor to the wafer W on the rotating stage 2 in a state of being fixed right above the stage 2 without moving in the X-axis direction.
- the wafer W since the air outlet H1 is circular, the wafer W may not be rotated in the horizontal plane.
- the supply amount of the solvent vapor is the same as that described in the fifth embodiment, the control of the supply amount of the solvent vapor to the peripheral portion will be described in order to further flatten the surface. Since the aforementioned ⁇ L1 and ⁇ S1 are in a trade-off relationship, an example for solving this will be described.
- a mechanical shielding plate is provided on the outer peripheral portion of the discharge port H1 as shown in FIG. 27 (adjustment mechanism 73).
- the viscosity of the peripheral portion of the liquid film is maintained with substantially no reduction, and the viscosity of the portion other than the peripheral portion (inner side of the peripheral portion) is reduced to alleviate the unevenness.
- drying (baking) to be described later it is possible to obtain the dried film Ma of FIG. 23 in which the protrusion of the peripheral portion is suppressed and the flatness of the other portion (inner side of the peripheral portion) is improved ( ⁇ S3 ⁇ S1 , ⁇ L3 ⁇ ⁇ L1).
- the solvent vapor is sprayed to only a predetermined region by the adjusting mechanism 73.
- the same effect as that of the first embodiment can be obtained. Furthermore, by dispersing and supplying the solvent vapor, the amount of supply to the coating film M in the surface becomes uniform, so that the film thickness uniformity can be improved. Further, by providing the adjustment mechanism 73 for adjusting the opening area of the blowout port H1, the supply range of the solvent vapor to the wafer W can be varied. For example, even when the size of the wafer W is changed, it is possible to supply the solvent vapor only to the coating film M on the wafer W in accordance with the size, so excess solvent vapor is removed in the apparatus. It will not scatter and can prevent the contamination of the device.
- the mechanical shield plate adjusting mechanism 73 on the outer peripheral portion (opening) of the outlet H1
- the amount of solvent vapor supplied to the peripheral portion is adjusted, so the viscosity of the peripheral portion of the liquid film is
- the peripheral shape is maintained with almost no reduction, and the viscosity of portions other than the peripheral portion (inner side of the peripheral portion) is reduced to alleviate the unevenness.
- drying (baking) to be described later it is possible to obtain a dried film Ma in which the protrusion of the peripheral portion is suppressed and the flatness of the portion other than the peripheral portion (inner side of the peripheral portion) is improved.
- the viscosity on the wafer W side (stage side) of the coating film M can be controlled not to be lower than the viscosity on the surface side. Therefore, it can prevent that the euros
- FIG. 28 Eighth Embodiment An eighth embodiment of the present invention will be described with reference to FIGS. 28 and 29.
- the eighth embodiment of the present invention is an application example in which the film forming apparatus 1 according to the first embodiment is applied to a film forming system 81. Therefore, in particular, parts different from the first embodiment will be described. In the eighth embodiment, the description of the same parts as the parts described in the first embodiment will be omitted.
- a film forming system 81 includes a film forming apparatus 1 for applying a photosensitive material to a wafer W, and an interface apparatus 82 for receiving the wafer W.
- a developing device 83 for developing the coating film M on the wafer W a baking device 84 for drying the coating film M on the wafer W, a chill plate 85 for cooling the coating film M on the wafer W, and
- An exposure unit 86 that exposes the coating film M, an edge cutting device 87 that performs edge cutting to remove unnecessary portions of the outer edge of the coating film M on the wafer W with a thinner, and a transfer device 88 that transfers the wafer W between the respective devices. And have.
- a film forming process (film forming method) performed by such a film forming system 81 will be described.
- the control device of the film forming system 81 executes the film forming process based on various programs.
- the wafer W which has been cleaned and pretreated is set in the interface device 82 in a state of being accommodated in the cassette, and the input of the wafer W is accepted (step S11).
- the wafer W is taken out of the cassette by the transfer device 88, transferred to and placed on the chill plate 85, and the wafer W is cooled for a predetermined time (step S12).
- the wafer W is taken out of the chill plate 85 and carried to the film forming apparatus 1, and a photosensitive material is applied onto the wafer W by the film forming apparatus 1 to form a coating film M.
- the film thickness flattening process of the film M is performed (step S13). The application and the film thickness flattening process at this time are the same as in the first embodiment (see FIG. 3).
- the wafer W is sequentially transferred by the transfer device 88, the wafer W is heated by the bake device 84, the coating film M on the wafer W is dried (step S14), and then the wafer W is cooled by the chill plate 85. (Step S15) The coated film M on the wafer W (that is, the dried film Ma) is exposed by the exposure device 86 (step S16).
- the wafer W is cooled again by the chill plate 85 (step S17), and the coated film M (that is, the dried film Ma) on the wafer W is developed by the developing device 83 and then washed (step S18).
- the sheet is returned to the interface device 82 by the transport device 88 and dispensed (step S19), and the process ends. Thereafter, the wafer W is singulated to generate a plurality of semiconductor devices such as semiconductor chips.
- the coating method which can be formed into a film limited to a certain area such as spiral coating, dot coating, dispenser coating, etc. is used instead of spin coating, it is possible to delete the edge cutting process.
- the cutting apparatus 87 can be removed to reduce the cost of the film forming system 81.
- the same effect as that of the first embodiment can be obtained. Furthermore, by applying the above-described film forming apparatus 1 to the film forming system 81, there is a coating method capable of forming a film limited to a certain area such as spiral coating, dot coating, dispenser coating instead of spin coating. As it is used, the material is applied only to a predetermined area of the application surface of the wafer W. As a result, the edge cutting process can be eliminated, so the edge cutting device 87 can be removed to reduce the cost of the film forming system 81.
- a coating method capable of forming a film limited to a certain area such as spiral coating, dot coating, dispenser coating instead of spin coating.
- the material is applied only to a predetermined area of the application surface of the wafer W.
- the edge cutting process can be eliminated, so the edge cutting device 87 can be removed to reduce the cost of the film forming system 81.
- the wafer W is used as the application object in the above-described embodiment, the present invention is not limited to this.
- a circular or non-circular glass substrate may be used.
- the present invention is used, for example, in a film forming apparatus and a film forming method for forming a coating film by applying a material on an object to be coated, and a semiconductor device manufactured by the film forming apparatus or the film forming method.
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Abstract
Description
本発明の第1の実施の形態について図1ないし図13を参照して説明する。
本発明の第2の実施の形態について図14ないし図16を参照して説明する。
本発明の第3の実施の形態について図17及び図18を参照して説明する。
本発明の第4の実施の形態について図19を参照して説明する。
本発明の第5の実施の形態について図20及び図21を参照して説明する。
本発明の第6の実施の形態について図24及び図25を参照して説明する。
本発明の第7の実施の形態について図26及び図27を参照して説明する。
本発明の第8の実施の形態について図28及び図29を参照して説明する。
なお、本発明は、前述の実施の形態に限るものではなく、その要旨を逸脱しない範囲において種々変更可能である。例えば、前述の実施の形態に示される全構成要素から幾つかの構成要素を削除してもよい。さらに、異なる実施の形態に亘る構成要素を適宜組み合わせてもよい。
Claims (20)
- 塗布対象物が載置されるステージと、
前記ステージに載置された前記塗布対象物上の所定領域に材料を塗布して塗布膜を形成する塗布部と、
前記塗布膜を溶解可能な溶媒蒸気を生成する給気部と、
前記ステージに載置された前記塗布対象物上の前記塗布膜に対し、前記給気部により生成された前記溶媒蒸気を吹き付ける吹付部と、
前記吹付部により吹き付ける前記溶媒蒸気の量を、前記塗布膜を溶解し、前記塗布膜の表層側部分の粘度が前記塗布対象物側部分の粘度より低くなる量となるよう制御する制御部と、
を備えることを特徴とする成膜装置。 - 前記制御部は、前記塗布膜の周縁部の内側の表層に前記溶媒蒸気を吹き付けるよう前記吹付部を制御することを特徴とする請求項1記載の成膜装置。
- 前記吹付部は、エアナイフ型であり、前記給気部により生成された前記溶媒蒸気を吹き出す吹出口を具備し、
前記吹出口の開口面積を調整する調整機構と、
前記ステージを水平面内で回転させる回転機構と、
を備え、
前記制御部は、前記回転機構により前記ステージを回転させながら、前記吹付部に前記溶媒蒸気の吹き付けを実行させる、
ことを特徴とする請求項1記載の成膜装置。 - 前記吹付部は、ノズル型であり、前記給気部により生成された前記溶媒蒸気を吹き出す吹出口を具備し、
前記ステージを水平面内で回転させる回転機構を備え、
前記制御部は、前記吹付部による前記溶媒蒸気の吹付量を前記塗布膜の周縁部と周縁部の内側とで異なる量とするように前記給気部を制御し、さらに前記回転機構により前記ステージを回転させながら、前記吹付部に前記溶媒蒸気の吹き付けを実行させる、
ことを特徴とする請求項1記載の成膜装置。 - 前記吹付部は、
前記ステージを覆うように形成され、前記給気部により生成された前記溶媒蒸気を吹き出す吹出口を有する筐体と、
前記筐体内に設けられ、前記給気部により生成された前記溶媒蒸気を分散させる分散部と、
前記吹出口の開口面積を調整する調整機構と、
を具備していることを特徴とする請求項1記載の成膜装置。 - 前記ステージの外縁に沿うように設けられ、前記吹出口から吹き出された余剰分の前記溶媒蒸気を排気する排気部を備えることを特徴とする請求項3、4又は5記載の成膜装置。
- 前記吹付部は、
前記給気部により生成された前記溶媒蒸気を吹き出す吹出口と、
前記吹出口の周囲に設けられ、前記吹出口から吹き出された余剰分の前記溶媒蒸気を排気する排気口と、
を具備していることを特徴とする請求項3、4又は5記載の成膜装置。 - 前記塗布部により塗布された前記塗布対象物上の前記塗布膜を乾燥させる乾燥部を備え、
前記制御部は、前記吹付部に前記溶媒蒸気の吹き付けを実行させるまでに前記塗布対象物上の前記塗布膜の表層を乾燥させるように前記乾燥部を制御することを特徴とする請求項3、4又は5記載の成膜装置。 - 前記制御部は、前記吹付部により吹き付ける前記溶媒蒸気の量を、少なくとも前記溶媒蒸気の搬送気体の流量または前記溶媒蒸気を発生する際の温度により制御することを特徴とする請求項1記載の成膜装置。
- 前記ステージを水平面内で回転させる回転機構を備え、
前記制御部は、前記回転機構により前記ステージを回転させながら、前記塗布膜の形成を実行させる、
を備えることを特徴とする請求項1記載の成膜装置。 - 前記吹付部により前記溶媒蒸気が吹き付けられた前記塗布対象物上の前記塗布膜を乾燥させる乾燥部を備えることを特徴とする請求項1記載の成膜装置。
- 請求項1記載の成膜装置により製造されたことを特徴とする半導体装置。
- 塗布対象物上の所定領域に材料を塗布して塗布膜を形成する工程と、
吹き付ける溶媒蒸気の量を、前記塗布膜を溶解し、前記塗布膜の表層側部分の粘度が前記塗布対象物側部分の粘度より低くなる量とするように調整して前記溶媒蒸気を生成する工程と、
前記調整して生成した前記溶媒蒸気を前記塗布対象物上の前記塗布膜に吹き付ける工程と、
を有することを特徴とする成膜方法。 - 前記溶媒蒸気を吹き付ける工程では、前記塗布膜の周縁部の内側に前記溶媒蒸気を吹き付けることを特徴とする請求項13記載の成膜方法。
- 前記吹き付ける工程では、吹き付けた余剰分の前記溶媒蒸気を排気することを特徴とする請求項14記載の成膜方法。
- 前記塗布膜を形成する工程の後で前記溶媒蒸気を吹き付ける工程の前に、前記塗布対象物上の前記塗布膜を乾燥させる工程を有することを特徴とする請求項13記載の成膜装置。
- 前記溶媒蒸気を生成する工程では、生成する前記溶媒蒸気の量を、少なくとも前記溶媒蒸気の搬送気体の流量または前記溶媒蒸気を発生する際の温度により調整して前記溶媒蒸気を生成することを特徴とする請求項13記載の成膜方法。
- 前記塗布膜を形成する工程では、前記塗布対象物を水平面内で回転させながら前記塗布対象物上に材料を塗布して前記塗布膜を形成することを特徴とする請求項13記載の成膜方法。
- 前記溶媒蒸気を生成する工程では、生成する前記溶媒蒸気の量を、前記溶媒蒸気の搬送気体の流量、前記溶媒蒸気を発生する際の温度、および前記塗布対象物の回転により調整して前記溶媒蒸気を生成することを特徴とする請求項18記載の成膜方法。
- 前記溶媒蒸気を吹き付ける工程の後に、前記塗布対象物上の前記塗布膜を乾燥させる工程を有することを特徴とする請求項13記載の成膜方法。
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