WO2012046672A1 - Deposition apparatus and deposition material supply method - Google Patents
Deposition apparatus and deposition material supply method Download PDFInfo
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- WO2012046672A1 WO2012046672A1 PCT/JP2011/072722 JP2011072722W WO2012046672A1 WO 2012046672 A1 WO2012046672 A1 WO 2012046672A1 JP 2011072722 W JP2011072722 W JP 2011072722W WO 2012046672 A1 WO2012046672 A1 WO 2012046672A1
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- temperature
- film forming
- valve
- vapor
- forming material
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
- H10K71/10—Deposition of organic active material
- H10K71/16—Deposition of organic active material using physical vapour deposition [PVD], e.g. vacuum deposition or sputtering
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C17/00—Surface treatment of glass, not in the form of fibres or filaments, by coating
- C03C17/001—General methods for coating; Devices therefor
- C03C17/002—General methods for coating; Devices therefor for flat glass, e.g. float glass
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/24—Vacuum evaporation
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/22—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the process of coating
- C23C14/54—Controlling or regulating the coating process
- C23C14/542—Controlling the film thickness or evaporation rate
- C23C14/543—Controlling the film thickness or evaporation rate using measurement on the vapor source
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/87—Arrangements for heating or cooling
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K71/00—Manufacture or treatment specially adapted for the organic devices covered by this subclass
Definitions
- the present invention relates to a film forming apparatus for forming a film by heating the film forming material to generate a vapor of the film forming material and supplying the vapor to a substrate to be processed by a carrier gas, and a film forming material supply Regarding the method.
- An organic EL (Electro-Luminescence) film forming apparatus is configured to heat a vapor of the organic film forming material by heating the organic film forming material to a high temperature, for example, 250 ° C. or more, an evaporation start temperature, and the like.
- a steam generation unit is provided.
- steam generation part is conveyed to a process chamber with carrier gas through a conveyance path.
- the processing chamber is provided with a blowing mechanism that blows out the vapor of the organic film forming material transferred through the transfer path toward the glass substrate accommodated in the processing chamber.
- An opening / closing valve for opening and closing the conveyance path is provided in the middle of the conveyance path. By controlling the opening / closing valve, the start and end of film formation by supplying steam to the glass substrate is controlled.
- the steam generation is performed by controlling the opening / closing operation of the on / off valve according to the temperature, the amount of steam, and the like of the steam generating unit. It is an object of the present invention to provide a film forming apparatus and a film forming material supply method capable of efficiently heating a film forming material while suppressing an increase in pressure and temperature inside the unit and performing precise temperature control.
- a processing chamber that accommodates a substrate to be processed, a vapor generating unit that generates vapor of the film forming material by heating the film forming material, and the vapor generating unit Provided in the middle of the transport path, a transport path for transporting the vapor of the film forming material to the processing chamber together with a transport gas, an exhaust path for exhausting the vapor of the film forming material generated in the steam generating section
- a film-forming apparatus comprising: a first on-off valve that opens and closes the transport path; and a second on-off valve that is provided in the middle of the exhaust path and opens and closes the exhaust path.
- Temperature detecting means for detecting the temperature of the generating part, steam amount detecting means for detecting the vapor amount of the film forming material conveyed from the steam generating part, and when the film forming material is heated, the temperature detecting means detects The opening / closing operation of the second opening / closing valve is controlled according to the temperature level And a control means for controlling the opening and closing operations of the first and second on-off valves according to the amount of vapor detected by the vapor amount detecting means when transporting the film forming material to the processing chamber. And
- the vapor generating section heats the film forming material to a temperature higher than a predetermined temperature
- the control means detects the temperature detected by the temperature detecting means as the predetermined temperature.
- the temperature detected by the temperature detecting means is equal to or higher than the predetermined temperature when the temperature of the first and second on-off valves is controlled to be closed and when the temperature of the steam generator is increased.
- the film forming apparatus is characterized in that the predetermined temperature is a temperature equal to or lower than an evaporation temperature of the film forming material.
- the film forming material is an organic film forming material
- the predetermined temperature is 250 ° C. or less.
- the temperature of the conveyance path on the downstream side of the first on-off valve is equal to or higher than the temperature of the first on-off valve, and the temperature of the first on-off valve is the first on-off valve.
- the film forming apparatus includes an upstream heating unit that heats the transport path on the upstream side of the first on-off valve, the first on-off valve, and the transport path on the downstream side of the first on-off valve, Valve heating means, downstream heating means, upstream for detecting the temperature of the conveyance path upstream of the first on-off valve, the first on-off valve, and the conveyance path downstream of the first on-off valve, respectively Side temperature detection means, valve temperature detection means, downstream temperature detection means, and the temperature of the conveyance path on the downstream side of the first on-off valve is equal to or higher than the temperature of the first on-off valve, and the first on-off valve Means for controlling the operation of the upstream heating means, the valve heating means and the downstream heating means so that the temperature of the upstream side becomes equal to or higher than the temperature of the conveying path on the upstream side of the first on-off valve. And
- the film forming apparatus includes a blowing mechanism for blowing the vapor of the film forming material transferred through the transfer path toward the substrate to be processed accommodated in the processing chamber, and the blowing mechanism is configured to have the transfer path. And a shutter for closing the opening so as to be openable and closable.
- a film forming material supply method includes a processing chamber that accommodates a substrate to be processed, a vapor generating unit that generates vapor of the film forming material by heating the film forming material, and generated in the vapor generating unit.
- the film forming apparatus includes a first on-off valve that opens and closes the transport path and a second on-off valve that is provided in the middle of the exhaust path and opens and closes the exhaust path.
- a film forming material supply method for heating a film material wherein the temperature of the steam generation unit is detected, and when the detected temperature is lower than a predetermined temperature, the first and second on-off valves are closed.
- the first on-off valve is opened to heat the film forming material, the vapor amount of the film forming material conveyed from the vapor generating unit is detected, and the first and second are determined according to the detected vapor amount. It is characterized by controlling the opening / closing operation of the opening / closing valve.
- a film forming material supply method includes a processing chamber that accommodates a substrate to be processed, a plurality of vapor generating units that generate vapor of the film forming material by heating the film forming material, and the plurality of vapors.
- a plurality of transport paths for transporting the vapor of the film-forming material generated in the generation unit to the processing chamber together with a transport gas; and a plurality of channels for exhausting the vapor of the film-forming material generated in the plurality of vapor generation units And a plurality of first on-off valves that open and close the transport path, and a plurality of first on-off valves that are provided in the middle of the exhaust path and open and close the exhaust path.
- the first on-off valve related to the first steam generator is closed.
- the film material When the film material is heated and the detected temperature is equal to or higher than the predetermined temperature, the film is heated by opening the second on-off valve related to the first steam generation unit, and the first steam Detecting the amount of vapor of the film forming material conveyed from the generator, and controlling the opening and closing operations of the first and second on-off valves related to the first vapor generator according to the detected amount of vapor; 2 detects the temperature of the steam generating unit 2 and, when the detected temperature is lower than a predetermined temperature, closes the first on-off valve related to the second steam generating unit to heat the film forming material, When the detected temperature is equal to or higher than the predetermined temperature, the film forming material is heated by opening the second on-off valve related to the second steam generation unit, and is transported from the second steam generation unit.
- the amount of vapor of the film forming material is detected, and according to the detected amount of vapor, before the first vapor generation unit With the first on-off valve in the closed state, and controlling the opening and closing operation of the second of said first and second on-off valve according to the steam generating unit.
- the temperature detection unit detects the temperature of the steam generation unit, and the control means controls the opening / closing operation of the second on-off valve according to the temperature of the steam generation unit.
- the second on-off valve When the second on-off valve is in the open state, the vapor of the film forming material generated in the steam generation unit can be discharged out of the steam generation unit. Film formation can be started in a stable state.
- the second on-off valve When the second on-off valve is in the closed state, the film forming material is efficiently heated in the steam generation unit.
- the film-forming material is heated to a temperature exceeding a predetermined temperature in the vapor generating section.
- the first and second on-off valves are kept closed.
- the pressure rise and temperature rise in the steam generating part due to evaporation of the film forming material are not a problem, so it is precise even when the first and second on-off valves are closed.
- Temperature control is possible.
- the second on-off valve is opened.
- the second on-off valve is in the open state, the vapor of the film forming material generated in the steam generation unit can be discharged until the desired amount of steam is stabilized. It can be suppressed.
- the predetermined temperature is equal to or lower than the evaporation temperature of the film forming material. Therefore, by opening and closing the second on-off valve in accordance with the predetermined temperature, it is possible to effectively suppress an increase in pressure and temperature in the vapor generation unit due to evaporation of the film forming material.
- the film forming material is an organic film forming material
- the predetermined temperature is 250 ° C. or lower. 250 ° C. is a lower limit value of the evaporation temperature of the organic film forming material. Therefore, by opening and closing the second on-off valve according to the predetermined temperature, an increase in pressure and temperature inside the steam generation unit due to evaporation of the organic film forming material can be effectively suppressed.
- the downstream temperature of the conveyance path is equal to or higher than the temperature of the first on-off valve, and the temperature of the first on-off valve is equal to or higher than the temperature of the upstream side of the conveyance path. Therefore, it is possible to prevent the film forming material from condensing on the transport path and the first on-off valve.
- the temperatures of the transport path upstream of the first on-off valve, the first on-off valve, and the transport path downstream of the first on-off valve are upstream temperature detection means, valve temperature detection means, and It is detected by the downstream temperature detecting means.
- the temperature of the conveying path on the downstream side of the first on-off valve is equal to or higher than the temperature of the first on-off valve
- the temperature of the first on-off valve is equal to or higher than the temperature of the conveying path on the upstream side of the first on-off valve.
- the operations of the upstream heating means, the valve heating means and the downstream heating means are controlled. Therefore, it is possible to more reliably prevent the film forming material from condensing on the transport path and the first on-off valve.
- the vapor of the film forming material transferred through the transfer path is supplied to the blowing mechanism and blown out to the substrate to be processed.
- the blow-out mechanism includes a retention chamber that retains vapor of the film forming material conveyed through the conveyance path, and the opening of the retention chamber can be opened and closed by a shutter. Therefore, even when the on-off valve is opened when the film forming material is heated, the opening is closed by the shutter so that the vapor of the film forming material is not blown into the processing chamber before the film forming process.
- the vapor generating section that generates the vapor of the film forming material can be quickly switched, and the film forming material can be exchanged without interrupting the film forming process.
- the film-forming material can be efficiently heated while suppressing the pressure rise and temperature rise inside the steam generating section, and precise temperature control can be performed.
- precise film thickness control by deposition of a film forming material on a substrate to be processed can be performed by precise temperature control.
- FIG. 6 is a schematic perspective view of a six-layer continuous film forming apparatus according to a third embodiment.
- FIG. It is sectional drawing of the film-forming unit which concerns on this Embodiment 3.
- FIG. It is sectional drawing of the steam generation part which concerns on this Embodiment 3.
- It is a schematic diagram of the organic EL element formed with the film-forming apparatus which concerns on this Embodiment 3.
- FIG. It is sectional drawing of the steam generation part which concerns on this Embodiment 3, and a conveyance path.
- It is sectional drawing of the regulating valve apparatus which concerns on this Embodiment 3.
- FIG. It is explanatory drawing which showed notionally the structure of the film-forming apparatus which concerns on this Embodiment 4.
- FIG. 1 is an explanatory diagram conceptually showing the configuration of the film forming apparatus according to the first embodiment.
- the film forming apparatus according to Embodiment 1 of the present invention accommodates a glass substrate G and performs a film forming process on the glass substrate (substrate to be processed) G, and each configuration of the film forming apparatus.
- the processing chamber 5 has a hollow, substantially rectangular parallelepiped shape with the conveyance direction of the glass substrate G as a longitudinal direction, and is made of aluminum, stainless steel, or the like.
- An inlet (not shown) for carrying the glass substrate G into the processing chamber 5 is formed on the surface on one end side in the longitudinal direction of the processing chamber 5 (left end surface in FIG. 1).
- an unillustrated unloading port for unloading the glass substrate G out of the processing chamber 5 is formed on the right end surface of 1, an unillustrated unloading port for unloading the glass substrate G out of the processing chamber 5 is formed.
- an exhaust hole is formed at an appropriate location of the storage chamber, and a vacuum pump disposed outside the processing chamber 5 is connected to the exhaust hole via an exhaust pipe.
- a purge gas supply pipe (not shown) for supplying a purge gas (for example, nitrogen gas) for releasing to the atmosphere may be connected to the processing chamber 5.
- a transfer device for transferring the glass substrate G from the carry-in port to the carry-out port is installed at the bottom inside the processing chamber 5.
- the transfer device includes a guide rail provided at the bottom of the processing chamber 5 along the longitudinal direction, a moving member guided by the guide rail so as to be movable in the transfer direction, that is, the longitudinal direction, It is provided in the upper end part, and is provided with the support stand which supports the glass substrate G so that it may become substantially parallel with respect to a bottom part.
- An electrostatic chuck for holding the glass substrate G, a heater for keeping the temperature of the glass substrate G constant, a refrigerant tube, and the like are provided inside the support base.
- the support base is configured to be moved by a linear motor. The operation of the linear motor is controlled by the control unit 8.
- a blowing mechanism 4 for forming a film on the glass substrate G by a vacuum vapor deposition method is provided in the upper part of the processing chamber 5 and substantially in the center in the transport direction.
- the blowing mechanism 4 is a mechanism unit that blows out vapor of an organic film forming material (film forming material) transferred through a transfer path 21 described later toward the glass substrate G accommodated in the processing chamber 5.
- the blowing mechanism 4 is connected to a vapor generation unit 1 disposed outside the processing chamber 5 via a conveyance path 21, and the vapor of the organic film forming material conveyed from the vapor generation unit 1 through the conveyance path 21.
- a residence chamber 41 for temporarily retaining is provided.
- the residence chamber 41 is, for example, a hollow substantially rectangular parallelepiped, and an opening 42 for blowing out the vapor of the organic film forming material staying in the residence chamber 41 is provided on the lower surface of the residence chamber 41.
- the blowing mechanism 4 includes a shutter 43 that closes the opening 42 so that the opening 42 can be opened and closed.
- the shutter 43 is configured to reciprocate between an open position where the opening 42 is opened and a closed position where the opening 42 is closed, and is driven by a shutter driving unit (not shown). The operation of the shutter driving unit is controlled by the control unit 8.
- the steam generation unit 1 includes, for example, a stainless steel container and a heating mechanism disposed inside the container.
- the heating mechanism has a container-shaped portion capable of accommodating the organic film forming material of each layer constituting the organic EL element, and is configured to heat the organic film forming material by a current generated by electric power supplied from a power source.
- the organic film forming material is, for example, a metal complex such as an aluminum complex (Alq 3 ), a low molecular dye-containing polymer such as polyvinyl carbazole, or a ⁇ -conjugated polymer.
- Alq 3 aluminum complex
- the organic film forming material is heated by, for example, an electric resistor embedded in a container.
- the container is connected to a carrier gas supply pipe 91 that supplies a carrier gas made of an inert gas, for example, a rare gas such as Ar, to the glass substrate G, and is supplied from the carrier gas supply pipe 91 to the container.
- a carrier gas supply adjusting valve 92 for adjusting the amount of carrier gas supplied is provided in the middle of the carrier gas supply pipe 91.
- the control unit controls the internal pressure of the carrier path 21 to 300 Pa or less. 8 is controlled.
- the conveyance path 21 connects between the steam generation unit 1 and the blowing mechanism, and conveys the vapor of the organic film forming material generated by the vapor generation unit 1 to the processing chamber 5 together with the conveyance gas.
- the conveyance path 21 is made of, for example, stainless steel, and the flow path diameter is, for example, 44.5 mm 2 or more.
- the film forming apparatus includes an adjustment valve device (first on-off valve) 31 that opens and closes the transport path 21 provided in the middle of the transport path 21.
- the regulating valve device 31 is, for example, an electromagnetic valve, and the opening / closing operation of the regulating valve device 31 is configured to be controlled by the control unit 8.
- a high temperature heat resistant valve described in JP 2010-216577 A Japanese Patent Application No. 2009-064546
- the high-temperature heat-resistant valve is excellent in leak characteristics at high temperatures and is suitable for high-temperature gas flow control.
- the film forming apparatus detects the temperature of the first upstream temperature detection unit (upstream temperature detection means) 61 a that detects the temperature of the conveyance path portion 21 a on the upstream side of the adjustment valve device 31, and the temperature of the adjustment valve device 31.
- a material temperature detection unit (temperature detection means) 64 that detects the temperature of the generation unit 1, that is, the temperature of the organic film forming material is provided.
- the first upstream temperature detection unit 61a, the first valve temperature detection unit 62a, the first downstream temperature detection unit 63a, and the material temperature detection unit 64 are configured using, for example, a resistance temperature detector, a thermocouple, a thermistor, or the like. A signal indicating the detected temperature of each unit is output to the control unit 8.
- the first upstream temperature detection unit 61a, the first valve temperature detection unit 62a, and the first downstream temperature detection unit 63a are not particularly limited as long as the temperature of each unit can be detected.
- a non-contact temperature sensor such as an infrared temperature sensor, a temperature sensor IC, or the like may be used.
- the film forming apparatus includes a first upstream heating unit (upstream heating unit) 71a that heats the conveyance path portion 21a on the upstream side of the regulating valve device 31, and a first valve heating unit that heats the regulating valve device 31.
- (Valve heating means) 72a and a first downstream heating section (downstream heating means) 73a for heating the conveyance path portion 21b on the downstream side of the regulating valve device 31 are provided.
- the first upstream heating unit 71a, the first valve heating unit 72a, and the first downstream heating unit 73a are configured using, for example, heating resistance elements such as heating wires and heaters, and the first upstream heating unit 71a.
- the first valve heating unit 72a and the first downstream heating unit 73a are connected to the control unit 8 via a power source (not shown), and the operation of each heating unit is configured to be controlled by the control unit 8. Yes.
- the first upstream heating unit 71a, the first valve heating unit 72a, and the first downstream heating unit 73a are not particularly limited as long as each unit can be heated, and may be an induction heating method, a combustion method, or the like. There may be.
- a first vapor amount detection unit (vapor amount detection means) 23 for detecting the vapor amount of the organic film forming material is provided in the conveyance path portion 21 a on the upstream side of the conveyance path 21.
- the second steam amount detection unit 24 may be provided between the downstream conveyance path portion 21 b, that is, between the blowing mechanism 4 and the regulating valve device 31.
- the first and second vapor quantity detectors 23 and 24 monitor the vapor quantity of a film thickness meter such as a quartz crystal (QCM: Quarts Crystal Microbalance), a capacitance manometer pressure gauge, or an FT-IR (Fourier Transform Infrared Spectrophotometer). It is a means that can.
- the first steam amount detection unit (steam amount detection means) 23 is used for detecting the steam amount in the steam generation unit and controlling the opening and closing of the regulating valve device 31.
- the second vapor amount detection unit (vapor amount detection means) 24 is used to measure the film formation amount and film formation rate during film formation.
- the second vapor amount detection unit (vapor amount detection means) 24 may be configured to detect the vapor amount during film formation or to perform feedback control.
- An exhaust path 22 is connected to the transport path portion 21 a on the upstream side of the transport path 21 so as to branch off halfway.
- the film forming apparatus includes an exhaust valve device (second on-off valve) 32 that opens and closes the exhaust path 22.
- the exhaust valve device 32 has the same configuration as the adjustment valve device 31, and the opening / closing operation of the exhaust valve device 32 is configured to be controlled by the control unit 8.
- a high temperature heat resistant valve can be used as the exhaust valve device 32.
- the film forming apparatus also includes a second upstream temperature detector 61 b that detects the temperature of the exhaust path portion 22 a on the upstream side of the exhaust valve apparatus 32, and a first temperature that detects the temperature of the exhaust valve apparatus 32.
- a two-valve temperature detector 62b and a second downstream temperature detector 63b that detects the temperature of the exhaust passage portion 22b on the downstream side of the exhaust valve device 32 are provided.
- the second upstream temperature detector 61b, the second valve temperature detector 62b, the second downstream temperature detector 63b, and the material temperature detector 64 are configured using, for example, a resistance temperature detector, a thermocouple, a thermistor, or the like.
- a signal indicating the detected temperature of each unit is output to the control unit 8.
- the film forming apparatus includes a second upstream heating unit 71 b that heats the exhaust passage portion 22 a on the upstream side of the exhaust valve device 32, a second valve heating unit 72 b that heats the exhaust valve device 32, and the exhaust valve device 32. And a second downstream heating unit 73b that heats the exhaust passage portion 22b on the downstream side.
- the details of each heating unit are the same as those of each heating unit provided in the transport path.
- the control unit 8 is, for example, a microcomputer provided with a CPU (Central Processing Unit).
- the CPU stores a computer program necessary for the operation of the control unit 8 and various types of information necessary for the film forming process.
- An input / output unit for inputting / outputting a signal for controlling the operation of each component of the film forming apparatus is connected via a bus.
- the various types of information include, for example, a predetermined temperature necessary for controlling the opening / closing operation of the regulating valve device 31 performed when the organic film forming material is heated.
- the predetermined temperature is a temperature set below the evaporation temperature of the organic film forming material. More specifically, the predetermined temperature is, for example, a temperature of 250 ° C. or lower that is equal to or lower than the evaporation start temperature.
- the various information includes, for example, a heating target temperature of the organic film forming material.
- the heating target temperature is a temperature that is higher than a predetermined temperature and that allows a desired evaporation amount to be obtained.
- the control unit 8 controls the opening / closing operation of the exhaust valve device 32 according to the temperature detected by the material temperature detection unit 64. Specifically, when the temperature detected by the material temperature detection unit 64 is lower than the predetermined temperature, the control unit 8 controls the regulating valve device 31 and the exhaust valve device 32 to be closed, and the material temperature detection unit When the temperature detected at 64 becomes the predetermined temperature, the exhaust valve device 32 is controlled to be opened.
- control unit 8 closes the exhaust valve device 32 and opens the regulating valve device 31 when the vapor amount of the organic film forming material is stabilized.
- the controller 8 is configured such that the temperature of the conveyance path portion 21 b on the downstream side of the adjustment valve device 31 is equal to or higher than the temperature of the adjustment valve device 31, and the temperature of the adjustment valve device 31 is the conveyance path portion on the upstream side of the adjustment valve device 31.
- the conveyance path 21 and the regulating valve device 31 are heated so that the temperature becomes 21 a or higher.
- the temperature of the conveyance path 21 on the downstream side of the adjustment valve device 31 is equal to or higher than the temperature of the adjustment valve device 31, and the temperature of the adjustment valve device 31 is on the conveyance path 21 on the upstream side of the adjustment valve device 31.
- the operations of the first upstream heating unit 71a, the first valve heating unit 72a, and the first downstream heating unit 73a are controlled so as to be equal to or higher than the temperature. This is because, if not controlled in this way, the vapor of the organic film forming material generated in the vapor generating unit 1 is condensed in the middle of the transport path 21.
- the control unit 8 determines that the temperature of the exhaust passage portion 22 b on the downstream side of the exhaust valve device 32 is equal to or higher than the temperature of the exhaust valve device 32, and the temperature of the exhaust valve device 32 is The exhaust passage 22 and the exhaust valve device 32 are heated so as to be equal to or higher than the temperature of the conveyance path portion 22a on the upstream side of the exhaust valve device 32.
- FIGS. 2 and 3 are flowcharts showing a processing procedure of the control unit 8 related to heating and transport of the organic film forming material.
- the controller 8 closes the regulating valve device 31, the exhaust valve device 32, and the shutter 43 (step S11), and heats the organic film forming material (step S12).
- the control unit 8 gives a control signal to the adjustment valve device 31 and the shutter drive unit, and closes the adjustment valve device 31, the exhaust valve device 32, and the shutter 43.
- the control part 8 operates a heating mechanism by giving a control signal to the steam generation part 1, and starts the heating of organic film-forming material.
- the control unit 8 detects the temperature of the steam generation unit 1 at the material temperature detection unit 64, and whether or not the temperature of the steam generation unit 1 is close to a predetermined temperature, that is, the temperature of the steam generation unit 1 is It is determined whether or not a temperature lower by a certain amount than the predetermined temperature has been reached (step S13).
- the fixed amount is determined by the temperature of the transport path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 before the temperature of the steam generating unit 1 reaches a predetermined temperature by the process of step S14 described later. It is set to reach a temperature equal to or higher than that of the generator 1.
- step S13 When it is determined in step S13 that the temperature of the steam generating unit 1 has not yet approached the predetermined temperature (step S13: NO), the control unit 8 executes the process of step S13 again. That is, the control unit 8 stands by until the temperature of the steam generation unit 1 approaches a predetermined temperature.
- step S13: YES the control part 8 calls the below-mentioned subroutine and performs temperature control of the conveyance path 21, the exhaust path 22, etc. (step S14). ).
- step S14 temperature control is performed so that the transport path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 are heated to their respective set temperatures before the steam generating unit 1 reaches a predetermined temperature.
- control part 8 detects the temperature of the steam generation part 1 in the material temperature detection part 64, and determines whether the temperature of the steam generation part 1 is more than predetermined temperature (step S15).
- step S15: NO When it determines with the temperature of the steam generation part 1 being less than predetermined temperature (step S15: NO), the control part 8 returns a process to step S14. When it determines with the temperature of the steam generation part 1 being more than predetermined temperature (step S15: YES), the control part 8 opens the exhaust valve apparatus 32 (step S16).
- the control unit 8 opens the adjustment valve 92 for supplying the carrier gas and supplies the carrier gas to the steam generating unit 1 (step S17).
- the supply timing of the carrier gas is an example, and the carrier gas may be supplied immediately after the exhaust valve device 32 is opened, or the carrier gas may not be supplied. However, when a temperature close to the target heating temperature is reached, it is preferable to supply the carrier gas at a flow rate similar to that during film formation.
- the control part 8 carries out PID control of the temperature of the steam generation part 1 so that the temperature of the steam generation part 1 may correspond with target heating temperature (step S18).
- step S19 the control unit 8 calls a subroutine described later, and performs temperature control of the conveyance path 21, the exhaust path 22, and the like (step S19).
- the control unit 8 detects the vapor amount of the organic film forming material using the first vapor amount detection unit 23, and controls the vapor amount to match the predetermined amount (step S20).
- the control unit 8 detects the vapor amount of the organic film forming material using the first vapor amount detection unit 23, and the vapor amount detected by the first vapor amount detection unit 23 is a predetermined amount and is stable. It is determined whether or not (step S21).
- the first steam amount detection unit (steam amount detection means) 23 detects the steam amount at predetermined time intervals, and determines whether or not the value of each steam amount is within a certain range. Alternatively, the monitoring may be continued continuously, and it may be determined to be stable when a value within a certain range for a predetermined time is indicated. As a result, when it is determined that the amount of steam is not stable (step S21: NO), the control unit 8 returns the process to step S18. When it determines with the vapor
- the control unit 8 performs PID control of the temperature of the steam generation unit 1 so that the temperature of the steam generation unit 1 matches the target heating temperature (step S24), and further executes a subroutine described later.
- the temperature control of the calling, transport path 21 and exhaust path 22 is performed (step S25), and the vapor amount of the organic film forming material is controlled (step S26).
- the control of the steam amount in step S26 is preferably performed based on the steam amount obtained by monitoring by the second steam amount detection unit 24. This is because the amount of vapor of the organic film forming material supplied to the substrate G can be more accurately controlled based on the amount of vapor of the organic film forming material detected in the portion close to the substrate G side.
- the organic film forming material is supplied to the substrate G, and the film forming process is started.
- the steam generating unit 1 is controlled by well-known PID control or the like so as to reach the heating target temperature.
- the amount is smaller than the predetermined amount, the flow rate of the carrier gas such as Ar gas is increased, and the vapor amount of the organic film forming material supplied to the blowing mechanism 4 is increased.
- the amount of steam is less than the predetermined amount and the amount of steam is small, the amount of steam of the organic material can be increased by heating the steam generating unit 1.
- both the flow rate of the carrier gas and the heating temperature of the vapor generating unit 1 may be changed, or the substrate G is supplied by controlling the temperature of the substrate G or changing the moving speed of the substrate G.
- the vapor amount of the organic film forming material can also be substantially controlled.
- the amount of deviation between the actual amount of steam and the predetermined amount is compared with a threshold, and when the amount of deviation is smaller than that value, the amount of steam is controlled by the flow rate of the carrier gas.
- the magnitude of the deviation is large, it is desirable to control the flow rate by changing the heating temperature, that is, changing the heating target temperature to a higher temperature.
- control unit 8 determines whether or not to end the film forming process (step S27). When it determines with not complete
- step S31 temperature control is performed so that the transport path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 are heated to a predetermined temperature until the steam generating unit 1 is at least below a predetermined temperature. You can go. If the steam generation part 1 becomes less than predetermined temperature, the above-mentioned temperature control is not necessarily required. And the control part 8 determines whether the temperature of the steam generation part 1 became less than predetermined temperature (step S32). That is, it is determined whether or not the generation of vapor of the organic film forming material has stopped, or whether or not the vapor amount has become sufficiently small.
- step S32: NO When it determines with the temperature of the steam generation part 1 being more than predetermined temperature (step S32: NO), the control part 8 returns a process to step S31, and performs temperature control of the conveyance path 21 and the exhaust path 22 continuously.
- step S32: YES When it determines with the temperature of the steam generation part 1 being less than predetermined temperature (step S32: YES), the control part 8 performs heating control of the conveyance path 21, the exhaust path 22, the adjustment valve apparatus 31, and the exhaust valve apparatus 32. Stop the supply (step S33), stop the supply of the carrier gas, and close the exhaust valve device 32 (step S34).
- step S35 determines whether or not to restart the film forming process.
- step S35: NO the control unit 8 executes the determination process of step S35 again.
- step S35: YES the control part 8 returns a process to step S12.
- the temperature on the downstream side of the steam generating unit 1 and the exhaust path 22 until the amount of vapor of the organic film forming material is sufficiently reduced (until the predetermined temperature or less).
- the temperature on the downstream side of the exhaust passage 22 is controlled to be higher.
- the temperature of the exhaust passage portion 22 b on the downstream side of the exhaust valve device 32 is equal to or higher than the temperature of the exhaust valve device 32, and the temperature of the exhaust valve device 32 is the conveyance path portion on the upstream side of the exhaust valve device 32.
- the temperature is controlled to be equal to or higher than the temperature of 22a.
- the transport path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 are predetermined before the vapor generation unit 1 is heated and the vapor generation unit 1 reaches a predetermined temperature. Must be heated to temperature. Thereafter, the temperature of the conveying path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 is raised while maintaining a temperature higher than the temperature of the steam generating unit 1. This is because the transport path 21, the exhaust path 22, the regulating valve device 31, and the exhaust valve device 32 may be heated to the predetermined temperature before the steam generating unit 1 reaches the predetermined temperature. There is no need to increase the temperature with temperature.
- FIG. 4 is a flowchart showing a processing procedure of the control unit 8 related to temperature control of the conveyance path 21 and the regulating valve device 31 and the like. Specifically, when a subroutine is called in the processes of steps S14, 19, 25, and 31, the control unit 8 detects the temperature of the steam generation unit 1 in the material temperature detection unit 64 (step 51).
- control part 8 detects the upstream temperature of the conveyance path 21 and the exhaust path 22 in the 1st and 2nd upstream temperature detection parts 61a and 61b (step S52).
- control unit 8 detects the temperature of the regulating valve device 31 and the exhaust valve device 32 in the first and second valve temperature detection units 62a and 62b (step S53), and the first and second downstream side temperature detection units.
- step S54 the downstream temperature of the conveyance path 21 and the exhaust path 22 is detected (step S54).
- the control unit 8 determines whether or not the temperature of the steam generation unit 1 (temperature equal to or lower than a predetermined temperature) is higher than the upstream side temperature of the conveyance path 21 and the exhaust path 22 (step S55). When it determines with the temperature of the steam generation part 1 being higher than the upstream temperature of the conveyance path 21, and the upstream temperature of the exhaust path 22 (step S55: YES), the control part 8 is 1st and 2nd upstream. One or both upstream sides of the conveyance path 21 and the exhaust path 22 are heated by the heating units 71a and 71b (step S56).
- step S55: NO the control part 8 of the said generation part 1, the conveyance path 21, and the exhaust path 22 is said.
- the temperature relationship is maintained (step S57).
- the control unit 8 that has finished the process of step S56 or step S57 determines whether the upstream temperatures of the transport path 21 and the exhaust path 22 are higher than the temperatures of the regulating valve device 31 and the exhaust valve device 32, respectively. (Step S58). That is, it is determined whether the upstream temperature of the conveyance path 21 is higher than the temperature of the regulating valve device 31, and whether the upstream temperature of the exhaust path 22 is higher than the temperature of the exhaust valve device 32. Determine whether or not.
- step S58 When it is determined that either the transport path 21 or the exhaust path 22 has an upstream temperature higher than the temperatures of the regulating valve device 31 and the exhaust valve device 32 (step S58: YES), the controller 8 controls the first valve One or both of the regulating valve device 31 and the exhaust valve device 32 are heated by the heating unit 72a (step S59). That is, when the upstream temperature of the conveyance path 21 is higher than the temperature of the regulating valve device 31, the regulating valve device 31 is heated, and the upstream temperature of the exhaust path 22 is higher than the temperature of the exhaust valve device 32. If so, the exhaust valve device 32 is heated.
- step S58 NO
- the control part 8 is the adjustment valve apparatus 31, exhaust valve apparatus. 32
- the temperature relationship between the conveyance path 21 and the exhaust path 22 is maintained (step S60).
- the control unit 8 determines whether or not the temperatures of the regulating valve device 31 and the exhaust valve device 32 are higher than the downstream temperatures of the transport path 21 and the exhaust path 22, respectively. (Step S61). That is, it is determined whether or not the temperature of the regulating valve device 31 is higher than the downstream temperature of the conveyance path 21 and whether or not the temperature of the exhaust valve device 32 is higher than the downstream temperature of the exhaust path 22. When it is determined that any one of the regulating valve device 31 and the exhaust valve device 32 is higher than the downstream temperature of the transport path 21 and the exhaust path 22 (step S61: YES), the first and second downstream heating units 73a.
- step S62 the downstream side of one or both of the transport path 21 and the exhaust path 22 is heated (step S62), and the process ends when the downstream temperature becomes equal to or higher than the temperature of the regulating valve device. That is, when the temperature of the regulating valve device 31 is higher than the downstream temperature of the conveyance path 21, the downstream side of the conveyance path 21 is heated, and the temperature of the exhaust valve device 32 is higher than the downstream temperature of the exhaust path 22. If so, the downstream side of the exhaust path 22 is heated.
- step S61 NO
- the control unit 8 controls the adjustment valve device 31, the exhaust valve device 32,
- the temperature relationship between the conveyance path 21 and the exhaust path 22 is maintained (step S63), and the process is finished.
- steps S61 to S63 the downstream temperatures of the conveyance path 21 and the exhaust path 22 become equal to or higher than the temperatures of the regulating valve device 31 and the exhaust valve device 32, and this state is maintained.
- the temperature of the steam generation part 1, the upstream conveyance path part 21a and the exhaust path part 22b, and the downstream conveyance path part 21b and the exhaust path part 22b is reduced.
- the temperature of the upstream conveyance path portion 21b and the exhaust path portion 22b is equal to or higher than the temperature of the steam generation unit 1, and the upstream conveyance path portion 21b and the exhaust path portion 22b.
- the temperature is lowered while maintaining the relationship that the temperature is the same as or lower than the temperatures of the downstream conveyance path portion 21b and the exhaust path portion 22b.
- the temperature of the vapor generating unit 1 reaches a predetermined temperature until just before the organic film forming material starts to evaporate.
- the regulating valve device 31 and the exhaust valve device 32 are closed to heat the organic film forming material, and when the organic film forming material starts to evaporate, the exhaust valve device 32 is opened and the organic film forming material is opened.
- the exhaust valve device 32 is closed and the regulating valve device 31 is opened. Therefore, it is possible to efficiently heat the film forming material while suppressing the pressure rise and temperature rise inside the steam generating section 1, and precise temperature control can be performed.
- precise film thickness control by deposition of a film forming material on a substrate to be processed can be performed by precise temperature control.
- the predetermined temperature is set to, for example, 250 ° C., which is the lower limit value of the evaporation temperature of the organic film forming material, it is effective to increase the pressure and temperature inside the vapor generating part due to the evaporation of the organic film forming material. Can be suppressed.
- the downstream temperature of the conveyance path 21 is equal to or higher than the temperature of the adjustment valve device 31, and the temperature of the adjustment valve device 31 is equal to or higher than the upstream temperature of the conveyance path 21. Therefore, it is possible to prevent the organic film forming material from condensing on the transport path 21 and the regulating valve device 31.
- the temperature of each part of the conveyance path 21 and the regulating valve device 31 is detected by the first upstream temperature detector 61a, the first valve temperature detector 62a, and the first downstream temperature detector 63a. Is heated by the first upstream heating unit 71a, the first valve heating unit 72a, and the first downstream heating unit 73a. Therefore, it is possible to more reliably prevent the organic film forming material from condensing on the transport path 21 and the regulating valve device 31.
- the exhaust passage 22 has the same effect.
- the opening 42 is closed by the shutter 43, so that the vapor of the organic film forming material is vaporized before the film forming process. It can prevent being blown into the inside.
- the exhaust passage 22 has the same effect.
- FIG. 5 is an explanatory diagram conceptually showing the configuration of the film forming apparatus according to the second embodiment.
- the first exhaust path 22 and the exhaust valve device 32 are provided in the upstream portion 21 from the adjustment valve device 31 of the transport path 21, but the film forming apparatus according to the second embodiment is Further, the second exhaust path 25 and the exhaust valve device 33 are provided downstream of the regulating valve device 31 and upstream of the blowing mechanism 4.
- the exhaust valve device 33 a high-temperature heat-resistant valve can be used like other valve devices.
- the processing chamber 5 is connected to a purge gas supply pipe 51 for supplying a purge gas for releasing the processing chamber 5 to the atmosphere, for example, nitrogen gas, and the purge gas is supplied to the processing chamber 5 from a purge gas supply source (not shown). It is configured as follows.
- the purge gas supply pipe 51 is provided with a purge gas on-off valve 52 for opening and closing the purge gas supply pipe 51.
- the control unit 8 closes the adjustment valve device 31 at the end of film formation, and opens the first and second exhaust valve devices 32 and 33.
- the regulating valve device 31 according to the modification is a high-temperature heat-resistant valve described in Japanese Patent Application Laid-Open No. 2010-216577 (Japanese Patent Application No. 2009-064546), and only the content of control when film formation is stopped is different from the above-described embodiment. Different.
- the control unit 8 according to the modified example 2 is configured not to perform temperature control on the downstream side of the adjustment valve device 31, that is, the conveyance path portion 21b when the film formation is stopped.
- control unit 8 is configured not to execute the processes of steps S61 to S63 in the first embodiment with respect to the temperature control of the transport path portion 21b when the film formation is stopped.
- the control unit 8 only the temperature relationship among the regulating valve device 31, the transport path portion 21 a on the upstream side of the transport path 21, and the steam generator 1 may be controlled to a predetermined relationship. This is because the regulating valve device 31 does not leak even in the high temperature region, and if the regulating valve device 31 is in the closed state, the steam does not flow to the downstream conveyance path portion 21b.
- the controller 8 closes the regulating valve device 31 immediately after the film formation is completed when the film formation is completed and the air release operation is started.
- the exhaust valve device 33 is opened, and the steam remaining in the blowing mechanism 4 is sucked and exhausted.
- the purge gas on-off valve 52 is opened to introduce the purge gas for releasing the atmosphere into the process chamber 5 from the outside of the process chamber 5.
- the processing chamber 5 can be opened to the atmosphere in a shorter time at the end of film formation.
- the volume of the processing chamber 5 also increases. For example, if it becomes a film-forming apparatus which processes the board
- the regulating valve device 31 can completely separate the downstream conveyance path portion 21b and the upstream conveyance path portion 21a of the regulating valve device 31 and control the temperature thereof. It becomes like this. According to such a configuration, it is possible to shorten the time required for opening to the atmosphere, and it is possible to greatly reduce downtime. That is, the time required for opening to the atmosphere can be shortened.
- the control and effect at the time of stopping the film formation when the high temperature heat resistant valve is used as the adjusting valve device 31 in the present film forming apparatus has been described in detail. It is only necessary that 21 and the regulating valve device 31 have a predetermined temperature relationship. That is, even if the predetermined temperature at which steam is generated is exceeded, it is not necessary that the predetermined transfer path 21 and the adjusting valve device 31 are in a temperature relationship as shown in the first embodiment, and the adjusting valve is not used at the start of film formation.
- the temperature of the conveyance path portion 21 b on the downstream side of the device 31 is equal to or higher than the temperature of the adjustment valve device 31, and the temperature of the adjustment valve device 31 is equal to or higher than the temperature of the conveyance path portion 21 a on the upstream side of the adjustment valve device 31. Just do it. That is, it is possible to independently control the temperature of the conveyance path 21b on the downstream side of the regulating valve device 31. As described above, the high-temperature heat-resistant valve has excellent leak characteristics at high temperatures, so that it is possible to independently control the temperature of the upstream conveyance path 21a and the downstream conveyance path 21b.
- FIG. 6 is a schematic perspective view of a six-layer continuous film forming apparatus according to the third embodiment
- FIG. 7 is a cross-sectional view of the film forming unit according to the third embodiment
- FIG. 8 is the present embodiment.
- 3 is a cross-sectional view of a steam generation unit according to FIG.
- the six-layer continuous film forming apparatus according to the third embodiment embodies the configuration of each component of the film forming apparatus according to the first embodiment, particularly the adjustment valve device 300 suitable for the present embodiment.
- the processing contents of the control unit are the same as those in the first embodiment. Therefore, in the following, the physical configuration of each component will be mainly described.
- the same reference numerals are given to components having the same configuration and function, and redundant description is omitted.
- the film forming apparatus has a rectangular processing chamber 500.
- the inside of the processing chamber 500 is exhausted by an exhaust device (not shown) and is maintained in a desired vacuum state.
- an exhaust device not shown
- six film forming units 10 are arranged side by side.
- a partition plate 510 is provided between adjacent film forming units 10.
- the film forming unit 10 includes three rectangular steam generation units 100, a connecting pipe 200, three regulating valve devices 300 and a blowing mechanism 400 that are arranged in pairs with the steam generation unit 100.
- the steam generating unit 100 is made of a metal such as SUS. Since quartz or the like hardly reacts with the organic film forming material, the vapor generating unit 100 may be formed of a metal coated with quartz or the like. Note that the steam generation unit 100 is an example of a vapor deposition source that vaporizes a material, and is not necessarily a unit-type vapor deposition source, and may be a general crucible.
- the material heating unit 130 heats the vapor generating unit 100 to a desired temperature, that is, a heating target temperature, and vaporizes the organic film forming material.
- Vaporization includes not only a phenomenon in which a liquid changes to a gas but also a phenomenon in which a solid changes directly to a gas without going through a liquid state (that is, sublimation).
- the vapor of the organic film forming material (vaporized organic molecules) is transported to the blowing mechanism 400 through the connecting pipe 200 and blown out from the slit-like opening 420 provided at the upper part of the blowing mechanism 400.
- the partition plate 510 prevents the film formation while the vapor of the organic film forming material blown out from the adjacent opening 420 is mixed.
- the face-down substrate G that slides at the ceiling position of the processing chamber 500 is formed, but the substrate G may be arranged face-up.
- the steam generation unit 100 includes a material input device 110 and an outer case 120.
- the material input device 110 includes a material container 110a for storing an organic film forming material and a carrier gas introduction channel 110b.
- the outer case 120 is formed in a bottle shape, and the material feeder 110 is detachably mounted in the hollow interior.
- the internal space of the steam generation unit 100 communicates with a conveyance path 200 a formed inside the connection pipe 200.
- the conveyance path 200 a is opened and closed by the opening and closing mechanism of the regulating valve device 300.
- the regulating valve device 300 opens and closes the conveyance path 200 a with pressurized air supplied from an air supply source 600 provided outside the processing chamber 500.
- the internal structure of the regulating valve device 300 will be described later.
- the end of the material input device 110 is connected to a gas supply source (not shown), and introduces argon gas supplied from the gas supply source into the flow path 110b.
- the argon gas functions as a carrier gas that carries vapor generated by evaporation of the organic film forming material stored in the material container 110a.
- the carrier gas is not limited to argon gas, and may be any inert gas such as helium gas or krypton gas.
- a material heating unit 130 such as a heater is embedded in the outer case 120 of the steam generation unit 100.
- a material temperature detecting unit 64 that detects the temperature of the steam generating unit 100 is disposed at an appropriate location inside the steam generating unit 100. The material temperature detection unit 64 outputs a signal indicating the detected temperature to the control unit.
- the steam generation unit 100 is connected to the blowing mechanism 400 via the transport path 200a of the connection pipe 200, and the vapor of the organic film forming material transported from the steam generation unit 1 through the transport path 200a is temporarily retained.
- a retention chamber 410 is provided.
- the residence chamber 410 is, for example, a hollow substantially rectangular parallelepiped, and an opening 420 for blowing out the vapor of the organic film material staying in the residence chamber 410 is provided on the upper surface of the residence chamber 410.
- the blowing mechanism 400 includes a shutter 430 that closes the opening 420 so that the opening 420 can be opened and closed.
- the shutter 430 is configured to be able to reciprocate between an open position where the opening 420 is opened and a closed position where the opening 42 is closed. This is the same as the first embodiment.
- the vapor of the organic film forming material is conveyed from the vapor generation unit 100 through the conveyance path 200a of the connecting pipe 200 to the blowing mechanism 400, temporarily stays in the retention chamber 410, and then passes through the slit-like opening 420 on the substrate G. Adhere to.
- FIG. 9 is a schematic diagram of an organic EL element formed by the film forming apparatus according to the third embodiment.
- the substrate G advances above the first to sixth blowing mechanisms 400 at a certain speed.
- the first hole injection layer, the second hole transport layer, the third blue light emitting layer, and the fourth green light emitting layer are sequentially formed on the ITO of the substrate G.
- the fifth red light emitting layer and the sixth electron transport layer are formed.
- the first to sixth organic layers are continuously formed.
- the blue light emitting layer, the green light emitting layer, and the red light emitting layer of the third to fifth layers are light emitting layers that emit light by recombination of holes and electrons.
- the metal layer (electron injection layer and cathode) on the organic layer is formed by sputtering.
- an organic EL element having a structure in which the organic layer is sandwiched between the anode (anode) and the cathode (cathode) is formed on the glass substrate G.
- a voltage is applied to the anode and cathode of the organic EL element, holes (holes) are injected into the organic layer from the anode, and electrons are injected into the organic layer from the cathode.
- the injected holes and electrons recombine in the organic layer, and light emission occurs at this time.
- FIG. 10 is a cross-sectional view of the steam generation unit 100 and the conveyance path according to the third embodiment.
- the path of the transport path 200a will be briefly described with reference to FIG. 10 showing a VIII-VIII cross section of FIG.
- the connecting pipe 200 conveys the vapor of the organic film forming material to the blowing mechanism 400 side via the regulating valve device 300.
- the valve body of the regulating valve device 300 is opened during film formation, the vapor of the organic film-forming material vaporized in each vapor generation unit 100 is conveyed by the carrier gas while being forwarded in the conveyance path.
- 200a1 is passed through the return path 200a2 and conveyed to the blowing mechanism 400.
- the valve body of the regulating valve device 300 is closed when the film is not formed, the forward path 200a1 and the return path 200a2 of the transport path are closed, and the transport of the vapor of the organic film forming material is stopped.
- the connecting pipe 200 is embedded with a first upstream heating unit 71a and a first downstream heating unit 73a for heating the forward path 200a1 and the return path 200a2, respectively.
- the connecting pipe 200 is provided with a first upstream temperature detector 61a and a first downstream temperature detector 63a that detect the temperatures of the forward path 200a1 and the return path 200a2, respectively.
- the first upstream temperature detection unit 61a and the first downstream temperature detection unit 63a each output a signal indicating the detected temperature to the control unit.
- FIG. 11 is a cross-sectional view of the regulating valve device 300 according to the third embodiment.
- the regulating valve device 300 has a cylindrical valve box 305.
- the valve box 305 is divided into three parts: a front member 305a, a central bonnet 305b, and a rear member 305c.
- the valve box 305 is hollow, and a valve body 310 is built in substantially the center thereof.
- a first valve heating unit 72a for heating the regulating valve device 300 for example, a heater is embedded.
- a first valve temperature detector 62a that detects the temperature of the regulating valve device 300 is embedded in the front member 305a. The first valve temperature detection unit 62a outputs a signal indicating the detected temperature to the control unit.
- the valve element 310 is separated into a valve element head part 310a and a valve element body part 310b.
- the valve head 310a and the valve body 310b are connected by a valve shaft 310c.
- the valve shaft 310c is a rod-like member, and penetrates the center of the valve body part 310b in the longitudinal direction, and is fitted into a recess 310a1 provided at the center of the valve body head 310a.
- the protrusion 310b1 of the valve body 310b is inserted into an annular recess 305a1 provided in the bonnet 305b of the valve box 305.
- an outward path 200a1 and a return path 200a2 of the transport path 200a are formed in the front member 305a of the valve box 305.
- the recess 305a1 is provided with a space in which the valve body 310b can slide in the longitudinal direction in a state in which the protrusion 310b1 is inserted, and a heat-resistant buffer member 315 is interposed in the space.
- a heat-resistant buffer member 315 is interposed in the space.
- An example of the buffer member 315 is a metal gasket. The buffer member 315 blocks the vacuum on the conveyance path side and the atmosphere on the valve shaft 310c side, and reduces mechanical interference between the protrusion 310b1 and the bonnet 305b due to sliding of the valve body part 310b.
- a play 310a2 is also provided in the recess 310a1 of the valve body head 310a with the valve shaft 310c inserted.
- the valve body 310 since the valve body part 310b and the valve body head part 310a are separated, by controlling the clearance (gap) between the valve body part 310b and the valve shaft 310c, The deviation of the center position of the valve body 310 during the opening / closing operation is corrected.
- a slight deviation of the shaft of the valve head 310a can be adjusted.
- the adjustment valve device 300 is used in a high temperature state or is used in a low temperature state, so that an influence is caused due to thermal expansion of the metal. Even so, since the influence can be absorbed by the separation structure of the valve body 310 as described above, the leakage of the valve body portion at the time of opening and closing can be effectively prevented as compared with the integrated valve body.
- the valve body drive unit 320 is provided on the rear member 305c of the valve box 305.
- the valve body drive unit 320 includes a power transmission member 320a, a first bellows 320b, and a second bellows 320c built in the valve box 305.
- the power transmission member 320a is substantially T-shaped and is screwed to the end of the valve shaft 310c.
- the first bellows 320b has one end welded to the power transmission member 320a and the other end welded to the rear member 305c. Accordingly, the first side which is isolated by the power transmission member 320a, the first bellows 320b, and the rear member 305c on the rear side of the valve box 305 (position opposite to the valve body 310 with respect to the power transmission member 320a). A space Us is formed.
- the second bellows 320c has one end welded to the power transmission member 320a and the other end welded to the rear member 305c.
- the power transmission member 320a, the first bellows 320b, the second bellows 320c, and the rear member 305c are isolated on the front side of the valve box 305 (position on the valve body side with respect to the power transmission member 320a).
- a second space Ls is formed.
- the first pipe 320d communicates with the first space Us isolated by the first bellows 320b.
- the first pipe 320d is connected to the supply pipe Ar1 of the air supply source 600.
- the first pipe 320d supplies the pressurized air output from the air supply source 600 to the first space Us.
- the second pipe 320e communicates with the second space Ls isolated by the first bellows 320b and the second bellows 320c.
- the second pipe 320e is connected to the supply pipe Ar2 of the air supply source 600.
- the second pipe 320e supplies the pressurized air output from the air supply source 600 to the second space Ls.
- the power transmission member 320a slides in the direction of pressing the valve body 310. Then, the valve body head portion 310a is pushed forward via the valve shaft 310c, whereby the valve body head portion 310a closes the forward path 200a1 of the conveyance path, and the valve body 310 is closed.
- the power transmission member 320a slides in the direction of pulling the valve body 310.
- the valve body head 310a is pulled backward via the valve shaft 310c, whereby the valve body head 310a is separated from the forward path 200a1 of the conveyance path, and the valve body 310 is opened.
- the third bellows 325 has one end welded to the valve body head portion 310a and the other end welded to the valve body portion 310b. Thereby, the atmospheric space on the valve shaft side and the vacuum space on the transport path side are blocked. Further, the clearance between the valve body part 310b and the valve shaft 310c can be managed by supporting the valve body part 310b and the valve body head part 310a by the third bellows 325. Thus, the valve body body portion 310b and the valve shaft 310c are controlled to contact with each other during the valve body opening / closing operation so that friction is not generated.
- the bonnet 305b is provided with a purge port 330 for purging the sealed space between the bonnet 305b and the valve body drive unit 320.
- a metal gasket 335 for sealing is interposed on the contact surface between the front member 305a and the bonnet 305b and the contact surface between the bonnet 305b and the rear member 305c of the valve box 305 in order to ensure hermeticity.
- the adjustment valve apparatus 300 can be made into a structure suitable for use in a vacuum environment.
- valve body and valve seat In the regulating valve device 300 according to the present embodiment, in addition to the separation of the valve body 310 as described above, the operability and the sealing performance can be stably maintained even in a high temperature environment of about 500 ° C.
- the material, shape, and surface processing of the valve body and valve seat are optimized.
- valve body and valve seat (Material and surface treatment of valve body and valve seat) Specifically, the inventors adopted austenitic stainless steel with excellent heat resistance as the material of the valve seat surface 200a3 and the valve body 310. In addition, the inventors processed the surface of the valve body 310 with Stellite (registered trademark) finish or F2 coat (registered trademark) so that the Vickers hardness was 500 HV or more. Stellite is obtained by applying a cobalt alloy-based weld pile to stainless steel, and F2 coating is a process of coating stainless steel with a material in which phosphorus is mixed into nickel.
- Stellite registered trademark
- F2 coat registered trademark
- the Vickers hardness of the valve body head 310a is 500 HV or more, and when F2 is coated, the Vickers hardness of the valve body head 310a is about 700 HV. Therefore, the F2 coat is more preferable than the stellite scale because of its high hardness.
- valve seat side for example, burnishing stainless steel.
- the metal surface is crushed by a roller and plastically deformed to harden the surface layer and finish the surface into a mirror surface.
- the inventors surface-treat the valve seat surface 200a3 so that the Vickers hardness is approximately 200 to 400 HV.
- the inventors set the F2 coat and Vickers hardness of the valve head 310a to 500 HV or higher, and the Vickers hardness of the valve seat surface 200a3 to approximately 200 to 400 HV by seat burnishing.
- a hardness difference was provided between the valve body head portion 310a and the valve seat surface 200a3, and different surface hardening treatments were applied to the valve body head portion 310a and the valve seat surface 200a3.
- a smooth opening and closing operation of the valve body 310 was realized, and galling and image sticking were prevented.
- valve seat surface 200a3 is too hard, the crystal structure of the material forming the valve seat surface 200a3 is broken, the corrosion resistance is lowered, the material constituting the valve seat is peeled off and flies into the transport path,
- the Vickers hardness of the valve seat surface 200a3 is set to 400 HV or less (preferably approximately 200 to 400 HV) because it is mixed into the film forming material and causes contamination.
- the portion of the valve body head 310a that contacts the valve seat surface 200a3 has a tapered shape, and the taper opening ⁇ with respect to a line perpendicular to the tip surface of the valve body head 310a is 40 ° to 80 °.
- the reason why the taper opening ⁇ is limited to 40 ° to 80 ° is to improve the sheet property. Thereby, the valve body 310 is opened and closed more smoothly, and galling and image sticking are prevented.
- the contact portion of the valve head 310a with the valve seat surface 200a3 may be arcuate. In that case, it is preferable to have a desired radius of curvature. Thereby, the valve body 310 is opened and closed more smoothly, and galling and image sticking are prevented.
- valve body 310 when the valve body 310 is assembled and finished, by performing coaxiality and alignment (sliding) between the valve seat and the valve body, the center axis of the valve body 310 and the valve seat surface 200a3 is prevented from being displaced. Set to the finished state. In this way, by performing special surface hardening treatment and preventing galling and seizure, a regulating valve that can stably maintain operability, sealing performance and heat resistance using a valve body and a valve seat made of metal.
- the device 300 could be constructed.
- FIG. 12 is a chart showing the result of detecting the leak amount using the regulating valve device 300 according to the third embodiment.
- the inventor verified the leak state of the valve body 310 using the regulating valve device 300 having the above-described configuration. The experiment was performed both in a state in which the valve box 305 was at a high temperature of 500 ° C. and in a state in which the valve box 305 was at room temperature.
- the taper opening ⁇ of the contact portion of the valve body head 310a was 60 ° C.
- the valve body head 310a is made of SUS316 stainless steel with F2 coating surface treatment, and the valve seat surface 200a3 is made of SUS316 stainless steel burnished.
- the Vickers hardness of the valve head 310a was 700 HV, and the Vickers hardness was 400 HV by seat burnishing of the valve seat (valve seat surface 200a3).
- the operating pressure (MPa) that is, the pressurized air supplied from the first pipe 320d presses the power transmission member 320a.
- MPa the pressurized air supplied from the first pipe 320d presses the power transmission member 320a.
- MPs the pressure at the time of changing was varied, the leak amount was on the order of 10 -11 (Pa ⁇ m 3 / sec) or less at all the operating pressures (0.20 to 0.60: MPs) examined.
- MPs the leak amount detection result was below the minimum detection sensitivity. This indicates that the leak amount could not be detected because almost no leak occurred.
- the leakage amount was on the order of 10 ⁇ 9 (Pa ⁇ m 3 / sec) or less at the operating pressure (0.50 to 0.60: MPs). From the above, even when the temperature in the valve box is room temperature, the leakage amount is on the order of 10 ⁇ 9 (Pa ⁇ m 3 / sec) or less when the operating pressure is 0.50 to 0.60 (MPa). It was found that the amount of leakage can be further reduced at a high temperature of about 500 ° C.
- the valve body 310 Compared with the conventional regulating valve device 300 having a leak amount of about 10 ⁇ 3 to 10 ⁇ 4 (Pa ⁇ m 3 / sec), in the regulating valve device 300 according to the present embodiment, the valve body 310 and By optimizing the material, shape, and surface processing of the valve seat, it was proved that the opening / closing operation of the valve body 310 can be repeated with almost no leakage.
- the organic vapor deposition material that passes through the transfer path 200a is used in an environment of high temperature and reduced pressure. The reason why the organic vapor deposition material is used at a high temperature will be described.
- the organic film forming material evaporated in the vapor generating unit 100 is transported to the substrate G through the transport path 200a by the transport gas Ar.
- the conveyance path 200a needs to be in a high temperature state of 300 ° C. or higher in order to avoid the deposition material from adhering to the inner wall of the conveyance path 200a.
- the reason why the organic vapor deposition material is used under reduced pressure is that it is desired to transport the vapor of the organic film forming material to the substrate G in a state where there is almost no contamination by making the inside of the transport path 200a a decompressed state. is there.
- the regulating valve device 300 of the film forming apparatus according to the second embodiment when used in an organic film forming apparatus, the vicinity of the valve body 310 is in a high temperature and reduced pressure state.
- leakage hardly occurs, so that the atmosphere on the valve shaft side does not flow into the conveyance path side even when the conveyance path side is in a vacuum environment.
- the regulating valve device 300 of the film forming apparatus according to the second embodiment can maintain a very high hermeticity even at a high temperature of about 500 ° C. Further, by forming both the valve body side and the valve seat side from metal and adopting the separation structure of the valve body, it is possible to realize a valve mechanism capable of preventing leakage with high accuracy.
- the regulating valve device according to the present invention is used not only for opening / closing a conveyance path provided in an organic EL device, but also for a manufacturing device requiring a valve opening / closing mechanism such as a semiconductor manufacturing device or an FPD device. be able to.
- the regulating valve device according to the present invention can be used in a high temperature state of about 500 ° C., and can be used in a vacuum state of about 10 ⁇ 1 to 10 2 Pa.
- a powdery (solid) organic film forming material can be used as the film forming material of the organic EL device according to the present invention.
- MOCVD Metal-Organic-Chemical-Vapor-Deposition: which grows a thin film on a to-be-processed object by using a liquid organic metal as a film-forming material and decomposing the vaporized film-forming material on a heated to-be-processed object: It can also be used for organometallic vapor phase epitaxy.
- FIG. 13 is an explanatory diagram conceptually showing the structure of the film forming apparatus according to the fourth embodiment.
- the film forming apparatus according to Embodiment 4 has basically the same configuration as that of Embodiment 1, except that a plurality of film forming material supply systems are provided.
- the film formation apparatus according to Embodiment 4 includes a processing chamber 5 that houses the glass substrate G, and first to third vapors of the film formation material that are generated by heating the film formation material.
- Vapor generation units 1011, 1012, 1013 and first to third conveyances for conveying vapors of film forming materials generated by the first to third vapor generation units 1011, 1012, 1013 together with the carrier gas to the processing chamber 5.
- First to third adjustment valve devices 1041, 1042 which are provided in the middle of the first to third conveyance paths 1021, 1022, 1023 and open and close the first to third conveyance paths 1021, 1022, 1023, 043, and first to third exhaust valve devices 1051, 1052, which are provided in the middle of the first to third exhaust passages 1031, 1032, 1033 and open and close the first to third exhaust passages 1031, 1032, 1033, 1053 and a blowing mechanism 4 for forming a film of a film forming material supplied from any one of the first to third vapor generating units 1011, 1012, 1013 on the glass substrate G by vacuum deposition. .
- the first to third transport paths 1021, 1022, and 1023 include a first upstream heating unit, a first valve heating unit, a first downstream heating unit, and a first upstream temperature detection.
- a first valve temperature detection unit, and a first downstream temperature detection unit, and the operation of each unit is controlled by the control unit.
- the first to third exhaust passages 1031, 1032, and 1033 include a second upstream heating unit, a second valve heating unit, a second downstream heating unit, a second upstream temperature detection unit, and a second valve temperature.
- a detection unit and a second downstream temperature detection unit are provided, and the operation of each unit is controlled by the control unit.
- a first steam amount detector is provided between the first to third steam generators 1011, 1012, 1013 and the first to third regulating valve devices 1041, 1042, 1043, and the blowing mechanism 4;
- a second steam amount detection unit is also provided between the first to third regulating valve devices 1041, 1042, and 1043. The detection result of each steam amount detection unit is input to the control unit.
- Supply pipes 1061, 1062, 1063 are connected, and first to third adjustment valves 1071, 1072, 1073 are provided in the middle of the first to third carrier gas supply pipes 1061, 1062, 1063.
- the film forming material supply method using the film forming apparatus configured as described above, particularly, the switching operation of the first to third vapor generating units 1011, 1012, 1013 accompanying the replacement of the film forming material will be described.
- an apparatus for supplying a vapor of the film formation material from the first vapor generation unit 1011 to replace the film formation material of the first vapor generation unit 1011 A process of switching to the second steam generation unit 1012 will be described.
- the other switching methods of the first to third steam generation units 1011, 1012, 1013 can be performed in the same manner.
- the first to third regulating valve devices 1041, 1042, 1043, the first to third exhaust valve devices 1051, 1052, 1053, and the shutter are closed, and the embodiment The same process as in Steps S12 to S26 of No. 1 may be executed for the first steam generation unit 1011.
- the control unit detects the temperature of the first steam generation unit 1011. If the detected temperature is lower than a predetermined temperature, the control unit 1041 is at least closed to heat the film forming material. When the detected temperature is equal to or higher than the predetermined temperature, the first exhaust valve device 1051 is opened to heat the film forming material, and the vapor amount of the film forming material conveyed from the first vapor generating unit is set.
- the control unit performs PID control on the temperature of the first vapor generation unit 1011, and supplies vapor of a certain film forming material to the processing chamber 5.
- the control unit when an instruction to switch from the first steam generation unit 1011 to the second steam generation unit 1012 is given to the control unit, the control unit performs the same process as in steps S12 to S21 on the second steam generation unit 1012. Execute. Specifically, the control unit detects the temperature of the second steam generation unit 1012, and when the detected temperature is lower than a predetermined temperature, at least the second regulating valve device 1042 is closed to heat the film forming material. When the detected temperature is equal to or higher than the predetermined temperature, the second exhaust valve device 1052 is opened to heat the film forming material, and the amount of vapor of the film forming material conveyed from the second steam generating unit 1012 is reduced. To detect.
- the control unit closes the second exhaust valve device 1052 and opens the second adjustment valve device 1042. Further, the control unit closes the first regulating valve device 1041 and opens the first exhaust valve device 1051.
- the timing of closing the second exhaust valve device 1052 and opening the second adjustment valve device 1042 and the timing of closing the first adjustment valve device 1041 and opening the first exhaust valve device 1051 can be appropriately set.
- the timing of closing the first adjustment valve device 1041 and the timing of opening the first exhaust valve device 1051 can be arbitrarily set, and the timing of closing the second exhaust valve device 1052 and the second adjustment valve device 1042 can be set.
- the timing before and after opening may be arbitrarily set. Thereafter, the same processing as in steps S30 to S34 is performed on the first steam generating unit 1011 side, heating control on the first steam generating unit 1011 side is stopped, and the first exhaust valve device 1051 is closed.
- the first to third vapor generating units 1011, 1012, and 1013 that generate the vapor of the film forming material can be quickly switched, and the film forming is performed. It is possible to replace the film forming material without interrupting the process.
- first to third regulating valve devices 1041, 1042, and 1043 and the first to third exhaust valve devices 1051, 1052, and 1053 employ the configuration described in the third embodiment, under high temperature heating.
- first to third steam generators 1011, 1012, 1013 there is no steam leakage from the first to third regulating valve devices 1041, 1042, 1043, and a certain amount of the vapor of the film forming material is processed. It is possible to supply to the chamber 5.
Abstract
Description
本発明は、斯かる事情に鑑みてなされたものであり、成膜材料を加熱する際、蒸気発生部の温度や蒸気量等に応じて、開閉弁の開閉動作を制御することによって、蒸気発生部内部の圧力上昇、温度上昇を抑えつつ効率的に成膜材料を加熱することができ、しかも精密な温度制御を行うことができる成膜装置及び成膜材料供給方法を提供するものである。 By the way, in order to control the film forming amount and film forming rate of the organic film forming material, precise temperature control of the organic film forming material is required. Specifically, it is required to control the temperature of the organic film forming material with an accuracy of ± 0.1 ° C. However, when the organic film-forming material in the vapor generating part reaches the evaporation temperature, the vapor concentration of the organic film-forming material gradually increases. Precise temperature control becomes difficult. In order to suppress such pressure rise and temperature rise and enable precise temperature control, that is, film thickness control, proper operation of the organic EL film forming apparatus is necessary, but a specific method is disclosed. It has not been.
The present invention has been made in view of such circumstances. When heating a film forming material, the steam generation is performed by controlling the opening / closing operation of the on / off valve according to the temperature, the amount of steam, and the like of the steam generating unit. It is an object of the present invention to provide a film forming apparatus and a film forming material supply method capable of efficiently heating a film forming material while suppressing an increase in pressure and temperature inside the unit and performing precise temperature control.
蒸気発生部の温度が所定温度以上である場合、第2開閉弁は開状態になる。第2開閉弁が開状態にある場合、所望の蒸気量に安定するまで、蒸気発生部で発生した成膜材料の蒸気を排出することができるため、蒸気発生部内部の圧力上昇及び温度上昇が抑えられる。 In the present invention, the film-forming material is heated to a temperature exceeding a predetermined temperature in the vapor generating section. When the temperature of the steam generating unit is lower than the predetermined temperature, the first and second on-off valves are kept closed. When the steam generating part is lower than the predetermined temperature, the pressure rise and temperature rise in the steam generating part due to evaporation of the film forming material are not a problem, so it is precise even when the first and second on-off valves are closed. Temperature control is possible. Moreover, it is possible to efficiently heat the film forming material by closing the first and second on-off valves.
When the temperature of the steam generating unit is equal to or higher than the predetermined temperature, the second on-off valve is opened. When the second on-off valve is in the open state, the vapor of the film forming material generated in the steam generation unit can be discharged until the desired amount of steam is stabilized. It can be suppressed.
(実施の形態1)
図1は、本実施の形態1に係る成膜装置の構成を概念的に示した説明図である。本発明の実施の形態1に係る成膜装置は、ガラス基板Gを収容し、ガラス基板(被処理基板)Gに対して成膜処理を行うための処理室5と、成膜装置の各構成部の動作を制御する制御部8とを備える。処理室5は、ガラス基板Gの搬送方向を長手方向とする中空略直方体形状をなし、アルミニウム、ステンレス等で構成されている。処理室5の長手方向一端側の面(図1中左端面)には、ガラス基板Gを処理室5内に搬入するための図示しない搬入口が形成され、長手方向他端側の面(図1中右端面)には、ガラス基板Gを処理室5外へ搬出するための図示しない搬出口が形成されている。また、収容室の適宜箇所には、排気孔が形成されており、排気孔には、処理室5の外部に配された真空ポンプが排気管を介して接続されている。真空ポンプが駆動することにより、処理室5の内部は所定の圧力、例えば10-4Pa~10-2Paに減圧される。なお、真空ポンプの動作は制御部8によって制御される。また、大気開放するためにパージガス(例えば、窒素ガス)を供給するパージガス供給管(図示しない)が処理室5に接続されていてもよい。
処理室5内部の底部には、ガラス基板Gを搬入口から搬出口へ搬送する搬送装置が設置されている。搬送装置は、処理室5の底部に長手方向に沿って設けられた案内レールと、該案内レールに案内されて搬送方向、即ち前記長手方向へ移動可能に設けられた移動部材と、移動部材の上端部に設けられており、ガラス基板Gを底部に対して略平行になるように支持する支持台とを備える。支持台の内部には、ガラス基板Gを保持する静電チャック、ガラス基板Gの温度を一定に保つためのヒータ、冷媒管等が設けられている。なお、支持台は、リニアモータによって移動するように構成されている。なお、リニアモータの動作は制御部8によって制御される。 Hereinafter, the present invention will be described in detail with reference to the drawings illustrating embodiments thereof.
(Embodiment 1)
FIG. 1 is an explanatory diagram conceptually showing the configuration of the film forming apparatus according to the first embodiment. The film forming apparatus according to
A transfer device for transferring the glass substrate G from the carry-in port to the carry-out port is installed at the bottom inside the
。第1蒸気量検出部(蒸気量検出手段)23は、蒸気発生部における蒸気量を検出し、調整弁装置31の開閉を制御するために用いられる。また、第2蒸気量検出部(蒸気量検出手段)24は、成膜量や成膜レートを成膜時に測定するために用いられる。第2蒸気量検出部(蒸気量検出手段)24を成膜時の蒸気量を検出したり、さらに、フィードバック制御するように構成してもよい。 Furthermore, a first vapor amount detection unit (vapor amount detection means) 23 for detecting the vapor amount of the organic film forming material is provided in the conveyance path portion 21 a on the upstream side of the
制御部8は、有機成膜材料を加熱する場合、材料温度検出部64にて検出された温度の高低に応じて、排気弁装置32の開閉動作を制御する。具体的には、制御部8は、材料温度検出部64にて検出された温度が前記所定温度未満である場合、調整弁装置31及び排気弁装置32を閉状態に制御し、材料温度検出部64にて検出された温度が前記所定温度となった場合、排気弁装置32を開状態に制御する。そして、制御部8は、有機成膜材料の蒸気量が安定したときに、排気弁装置32を閉鎖し、調整弁装置31を開放する。
制御部8は、調整弁装置31の下流側における搬送路部分21bの温度が、調整弁装置31の温度以上であり、調整弁装置31の温度が、調整弁装置31の上流側における搬送路部分21aの温度以上になるように、搬送路21及び調整弁装置31を加熱する。具体的には、調整弁装置31の下流側における搬送路21の温度が、調整弁装置31の温度以上であり、調整弁装置31の温度が、調整弁装置31の上流側における搬送路21の温度以上になるように、第1上流側加熱部71a、第1弁加熱部72a及び第1下流側加熱部73aの動作を制御する。このように制御しないと、蒸気発生部1において発生した有機成膜材料の蒸気が搬送路21の途中で凝縮してしまうためである。
こうした事情は排気路22でも同様であり、制御部8は、排気弁装置32の下流側における排気路部分22bの温度が、排気弁装置32の温度以上であり、排気弁装置32の温度が、排気弁装置32の上流側における搬送路部分22aの温度以上になるように、排気路22及び排気弁装置32を加熱する。 The
When the organic film forming material is heated, the
The
The same applies to the
制御部8は、調整弁装置31、排気弁装置32及びシャッタ43を閉鎖し(ステップS11)、有機成膜材料を加熱する(ステップS12)。具体的には、制御部8は、調整弁装置31及びシャッタ駆動部に制御信号を与え、調整弁装置31、排気弁装置32及びシャッタ43を閉鎖する。また、制御部8は、蒸気発生部1に制御信号を与えることによって、加熱機構を動作させ、有機成膜材料の加熱を開始する。次いで、制御部8は、材料温度検出部64にて蒸気発生部1の温度を検出し、蒸気発生部1の温度が所定温度に接近しているか否か、即ち蒸気発生部1の温度が、所定温度よりも更に一定量低い温度に到達したか否かを判定する(ステップS13)。該一定量は、後述のステップS14の処理によって、蒸気発生部1の温度が所定温度に到達する前に、搬送路21、排気路22、調整弁装置31、及び排気弁装置32の温度が蒸気発生部1と同等か、それ以上の温度に到達するように設定される。 2 and 3 are flowcharts showing a processing procedure of the
The
同様に、本実施の形態では、少なくとも、搬送路21の上流側の温度が、蒸気発生部1の温度以上になるように制御する。 In the above-described end control, that is, the processing from step S28 to step S34, the temperature on the downstream side of the
Similarly, in the present embodiment, control is performed so that at least the temperature on the upstream side of the
図4は、搬送路21及び調整弁装置31等の温度制御に係る制御部8の処理手順を示したフローチャートである。具体的には、制御部8は、ステップS14,19,25,31の処理でサブルーチンが呼び出された場合、材料温度検出部64において、蒸気発生部1の温度を検出する(ステップ51)。そして、制御部8は、第1及び第2上流側温度検出部61a、61bにおいて、搬送路21及び排気路22の上流側温度を検出する(ステップS52)。次いで、制御部8は、第1及び第2弁温度検出部62a,62bにおいて、調整弁装置31及び排気弁装置32の温度を検出し(ステップS53)、第1及び第2下流側温度検出部63a,63bにおいて、搬送路21及び排気路22の下流側温度を検出する(ステップS54)。 Next, temperature control of the
FIG. 4 is a flowchart showing a processing procedure of the
成膜を終了するときも、成膜を開始するときや成膜途中の場合と逆の制御を行なう。
つまり、まず、シャッタ43および調整弁装置31を閉じ、排気弁装置32を開状態にする。そして、蒸気発生部1、上流側の搬送路部分21a及び排気路部分22b並びに下流側の搬送路部分21b及び排気路部分22bの温度を低下させる。このとき、少なくとも所定温度までは、上流側の搬送路部分21b及び排気路部分22bの温度が蒸気発生部1の温度と同一又はそれよりも高く、上流側の搬送路部分21b及び排気路部分22bの温度が下流側の搬送路部分21b及び排気路部分22bの温度と同一又は低いという関係を保ちつつ温度を降下させる。このように温度降下を制御することにより搬送路21及び排気路22途中での有機成膜材料の凝縮・堆積を防止することができ、次回の成膜処理時に凝縮した有機材料が剥がれ落ちたりすることによる基板の汚染防止が可能となる。 When the film formation is started or during the film formation by the above-described process, PID control or the like is performed based on the temperature detected by each detection unit, the
When film formation is terminated, control opposite to that at the time of starting film formation or during film formation is performed.
That is, first, the
更に、本発明にあっては、搬送路21の下流側温度は、調整弁装置31の温度以上であり、調整弁装置31の温度は、搬送路21の上流側温度以上である。従って、搬送路21及び調整弁装置31に有機成膜材料が凝縮することを防止することが可能である。 In addition, since the predetermined temperature is set to, for example, 250 ° C., which is the lower limit value of the evaporation temperature of the organic film forming material, it is effective to increase the pressure and temperature inside the vapor generating part due to the evaporation of the organic film forming material. Can be suppressed.
Furthermore, in the present invention, the downstream temperature of the
実施の形態2に係る成膜装置は、成膜終了時に吹き出し機構内に滞留する有機成膜材料の蒸気を迅速に排気することができるように構成されており、排気路及び排気弁装置を搬送路の上流側及び下流側の双方に設けた点が異なるため、以下では主に上記相異点を説明する。
図5は、本実施の形態2に係る成膜装置の構成を概念的に示した説明図である。第1の実施形態においては、第1の排気路22及び排気弁装置32を搬送路21の調整弁装置31よりも上流側部分21に設けたが、実施の形態2に係る成膜装置は、更に、調整弁装置31の下流側であって、吹き出し機構4の上流側に第2の排気路25及び排気弁装置33を有する。排気弁装置33として、他の弁装置と同様に高温耐熱バルブを用いることができる。また、処理室5には、処理室5を大気開放させるためのパージガス、例えば窒素ガスを供給するパージガス供給管51が接続されており、図示しないパージガス供給源から処理室5へパージガスが供給されるように構成されている。パージガス供給管51には該パージガス供給管51を開閉させるパージガス用開閉弁52が設けられている。 (Embodiment 2)
The film forming apparatus according to the second embodiment is configured to be able to quickly exhaust the vapor of the organic film forming material staying in the blowing mechanism at the end of film formation, and transports the exhaust path and the exhaust valve device. Since the points provided on both the upstream side and the downstream side of the road are different, the differences will be mainly described below.
FIG. 5 is an explanatory diagram conceptually showing the configuration of the film forming apparatus according to the second embodiment. In the first embodiment, the
(実施の形態2の変形例)
変形例に係る調整弁装置31は、特開2010-216577号公報(特願2009-064546号)に記載の高温耐熱バルブであり、成膜停止時の制御内容のみが上述の実施の形態とは異なる。変形例2に係る制御部8は、成膜停止時において、調整弁装置31の下流側、即ち搬送路部分21bの温度制御を行わないように構成されている。つまり、制御部8は、成膜停止時においては、搬送路部分21bの温度制御に関して、実施の形態1におけるステップS61~S63の処理を実行しないように構成されている。言い換えると、調整弁装置31と、搬送路21の上流側の搬送路部分21aと、蒸気発生部1との温度関係のみを所定の関係に制御すれば良い。これは、高温領域においても調整弁装置31はリークが無く、調整弁装置31が閉状態であれば、下流側の搬送路部分21bに蒸気が流れることが無いからである。 With this configuration, the vapor of the organic film forming material staying in the blowing mechanism can be quickly exhausted at the end of film formation.
(Modification of Embodiment 2)
The regulating
以上、高温耐熱バルブを調整弁装置31として本成膜装置に用いた場合の成膜停止時の制御・効果について詳細に記載したが、昇温時においても成膜を開始するその時までに搬送路21と調整弁装置31が所定の温度関係になっていればよい。即ち、蒸気が生成される所定温度を超えていても実施の形態1で示したような所定の搬送路21と調整弁装置31が温度関係になっている必要はなく、成膜開始時に調整弁装置31の下流側における搬送路部分21bの温度が、調整弁装置31の温度以上であり、調整弁装置31の温度が、調整弁装置31の上流側における搬送路部分21aの温度以上になっていればよい。つまり調整弁装置31の下流側の搬送路21bを独立して温度制御することが可能である。前述のように高温耐熱バルブは高温におけるリーク特性が優れているため、上流側搬送路21aと下流側搬送路21bとを独立して温度制御することが可能となる。 According to the film forming apparatus according to the modification, the
As described above, the control and effect at the time of stopping the film formation when the high temperature heat resistant valve is used as the adjusting
図6は、本実施の形態3に係る6層連続型の成膜装置の概略斜視図、図7は、本実施の形態3に係る成膜ユニットの断面図、図8は、本実施の形態3に係る蒸気発生部の断面図である。以下に添付図面を参照しながら、本発明の実施の形態3にかかる成膜装置について詳細に説明する。なお、実施の形態3に係る6層連続型の成膜装置は、実施の形態1に係る成膜装置の各構成部、特に本実施の形態に好適な調整弁装置300の構成を具体化したものであり、制御部の処理内容は実施の形態1と同様である。従って,以下では、主に各構成部の物理的構成について説明を行う。また、以下の説明及び添付図面において、同一の構成及び機能を有する構成要素については、同一符号を付することにより、重複説明を省略する。 (Embodiment 3)
FIG. 6 is a schematic perspective view of a six-layer continuous film forming apparatus according to the third embodiment, FIG. 7 is a cross-sectional view of the film forming unit according to the third embodiment, and FIG. 8 is the present embodiment. 3 is a cross-sectional view of a steam generation unit according to FIG. Hereinafter, a film forming apparatus according to a third embodiment of the present invention will be described in detail with reference to the accompanying drawings. The six-layer continuous film forming apparatus according to the third embodiment embodies the configuration of each component of the film forming apparatus according to the first embodiment, particularly the
1.調整弁装置を利用する成膜装置の全体構成
2.成膜装置に係る成膜ユニットの内部構成
3.成膜ユニットに係る調整弁装置の内部構成
4.弁体及び弁座面の構造、形状、表面処理
5.リーク状態の検証 The description will be given in the following order.
1. 1. Overall configuration of a film forming apparatus using a regulating
まず、本発明の実施形態2に係る成膜装置について、その概略構成を示した図6を参照しながら説明する。 [Film deposition equipment]
First, a film forming apparatus according to
つぎに、図6のV-V断面を示した図7及び図8を参照しながら、成膜ユニット10の内部構造について説明する。なお、図6に示した他の5つの成膜ユニット10は、図6のV-V断面の成膜ユニット10と同一構造であるためその説明を省略する。 [Deposition unit]
Next, the internal structure of the film forming unit 10 will be described with reference to FIGS. 7 and 8 showing the VV cross section of FIG. The other five film forming units 10 shown in FIG. 6 have the same structure as the film forming unit 10 in the VV cross section in FIG.
有機成膜材料の蒸気は、蒸気発生部100から連結管200の搬送路200aを通って吹き出し機構400に搬送され、滞留室410に一時滞留した後、スリット状の開口420を通って基板G上に付着する。 It blows out from the slit-shaped
The vapor of the organic film forming material is conveyed from the
図9は、本実施の形態3に係る成膜装置により形成された有機EL素子の模式図である。本実施形態にかかる成膜装置では、図6に示したように、基板Gは1~6番目の吹き出し機構400の上方をある速度で進行する。進行中、図9に示したように、基板GのITO上に順に、第1層のホール注入層、第2層のホール輸送層、第3層の青発光層、第4層の緑発光層、第5層の赤発光層、第6層の電子輸送層が成膜される。このようにして、本実施形態にかかる成膜装置では、第1層~第6層の有機層が連続成膜される。このうち、第3層~第5層の青発光層、緑発光層、赤発光層は、ホールと電子の再結合により発光する発光層である。また、有機層上のメタル層(電子注入層及び陰極)は、スパッタリングにより成膜される。 [Organic film structure]
FIG. 9 is a schematic diagram of an organic EL element formed by the film forming apparatus according to the third embodiment. In the film forming apparatus according to the present embodiment, as shown in FIG. 6, the substrate G advances above the first to
図10は、本実施の形態3に係る蒸気発生部100及び搬送路の断面図である。つぎに、図7のVIII -VIII 断面を示した図10を参照しながら、搬送路200aの経路について簡単に説明する。前述したように、連結管200は、調整弁装置300を経由して有機成膜材料の蒸気を吹き出し機構400側へ搬送する。具体的には、調整弁装置300の弁体は成膜中には開くため、各蒸気発生部100にて気化された有機成膜材料の蒸気は、搬送ガスにより搬送されながら、搬送路の往路200a1から復路200a2に通され、吹き出し機構400まで搬送される。一方、調整弁装置300の弁体は成膜しないときには閉じられているため、搬送路の往路200a1と復路200a2とは閉塞され、有機成膜材料の蒸気の搬送は停止させる。 [Conveyance route]
FIG. 10 is a cross-sectional view of the
当該調整弁装置を用いて本成膜装置を構成すれば、有機成膜材料の蒸発温度より高い高温度領域においても有機成膜材料蒸気の供給制御を正確に行なうことができる。
図11は、本実施の形態3に係る調整弁装置300の断面図である。次に、調整弁装置300の断面を示した図11を参照しながら、調整弁装置300の内部構成及び動作について詳述する。調整弁装置300は、円筒状の弁箱305を有している。弁箱305は、前方部材305a、中央のボンネット305b、後方部材305cの3つに分かれている。弁箱305は中空になっていて、その略中央に弁体310が内蔵されている。 [Regulating valve device]
If this film forming apparatus is configured using the regulating valve device, the supply control of the organic film forming material vapor can be accurately performed even in a high temperature region higher than the evaporation temperature of the organic film forming material.
FIG. 11 is a cross-sectional view of the regulating
弁体頭部310aの凹部310a1にも、弁軸310cが挿入された状態で遊び310a2が設けられている。本実施形態に係る弁体310では、弁体身部310bと弁体頭部310aとが分離されているので、弁体身部310bと弁軸310cとのクリアランス(隙間)を制御することにより、開閉動作時の弁体310の中心位置のずれを補正する。これに加えて、弁体頭部310aの凹部310a1に遊び310a2を設けたことにより、弁体頭部310aの軸の微少なずれを調整することができる。これにより、弁体頭部310aを弁座面200a3に偏りなく当接することにより、弁体頭部310aと弁座面200a3との密着性を高くして、リークを防ぐことができる。この結果、本実施形態に係る分離型の弁体310によれば、調整弁装置300が高温状態にて使用されたり、低温状態にて使用されたりして金属が熱膨張することによる影響が生じたとしても、弁体310の分離構造により上述したようにその影響を吸収できるため、一体型の弁体に比べて開閉時の弁体部分のリークを効果的に防ぐことができる。 (Separation structure of valve body and valve head)
A play 310a2 is also provided in the recess 310a1 of the
本実施形態にかかる調整弁装置300では、上述したように弁体310を分離構造にしたことに加えて、500℃程度の高温環境においても操作性及びシール性を安定して維持できるように、弁体及び弁座の材質、形状及び表面加工の最適化を図っている。 [Surface treatment of valve body and valve seat]
In the regulating
具体的には、発明者らは、弁座面200a3及び弁体310の材質として、耐熱性に優れたオーステナイト系ステンレス鋼を採用した。加えて、発明者らは、弁体310の表面を、ビッカース硬さが500HV以上になるように、ステライト(登録商標)仕上げ又はF2コート(登録商標)により加工した。ステライトは、ステンレス鋼にコバルト合金系の溶接盛りを施したものであり、F2コートは、ニッケルにリンを混入させた材料にてステンレス鋼をコーティングする処理である。たとえば、ステンレス鋼をステライト盛りすると、弁体頭部310aのビッカース硬さは500HV以上になり、F2コートすると、弁体頭部310aのビッカース硬さは700HV程度になる。よって、硬度の高さからステライト盛りよりF2コートの方が好ましい。 (Material and surface treatment of valve body and valve seat)
Specifically, the inventors adopted austenitic stainless steel with excellent heat resistance as the material of the valve seat surface 200a3 and the
弁体頭部310aの弁座面200a3と当接する部分はテーパ形状であり、弁体頭部310aの先端面に垂直な線分に対するテーパ開度θは40°~80°である。テーパ開度θを40°~80°に限定したのは、シート性向上のためである。これにより、弁体310をさらにスムーズに開閉し、カジリや焼き付きを防止する。 (Shape of valve body and valve seat)
The portion of the
図12は、本実施の形態3に係る調整弁装置300を用いてリーク量を検出した結果を示した図表である。
発明者は、上記構成の調整弁装置300を用いて弁体310のリーク状態について検証した。実験は、弁箱305を500℃の高温にした状態と、弁箱305を室温にした状態との両方について行われた。弁体頭部310aの当接部分のテーパ開度θは60℃とした。弁体頭部310aは、SUS316のステンレス鋼にF2コートの表面処理が施され、弁座面200a3は、SUS316のステンレス鋼にバニシング加工が施されている。弁体頭部310aのビッカース硬さは700HV、弁座(弁座面200a3)のシートバニシング加工によりビッカース硬さは400HVであった。 [Verify leak condition]
FIG. 12 is a chart showing the result of detecting the leak amount using the regulating
The inventor verified the leak state of the
図13は、本実施の形態4に係る成膜装置の構成を概念的に示した説明図である。実施の形態4に係る成膜装置は、基本的には実施の形態1と同様の構成であり、複数の成膜材料供給系を備える点が異なる。具体的には、実施の形態4に係る成膜装置は、ガラス基板Gを収容する処理室5と、成膜材料を加熱することによって、該成膜材料の蒸気を発生させる第1乃至第3蒸気発生部1011、1012、1013と、第1乃至第3蒸気発生部1011、1012、1013で発生させた成膜材料の蒸気を搬送ガスと共に処理室5へ搬送するための第1乃至第3搬送路1021、1022、1023と、第1乃至第3蒸気発生部1011、1012、1013で発生させた成膜材料の蒸気を排気するための第1乃至第3排気路1031、1032、1033と、第1乃至第3搬送路1021、1022、1023の途中に設けられており、第1乃至第3搬送路1021、1022、1023を開閉する第1乃至第3調整弁装置1041、1042、1043と、第1乃至第3排気路1031、1032、1033の途中に設けられており、第1乃至第3排気路1031、1032、1033を開閉する第1乃至第3排気弁装置1051、1052、1053と、第1乃至第3蒸気発生部1011、1012、1013のいずれかから供給された成膜材料の蒸気をガラス基板Gに対して真空蒸着法にて成膜を行う吹き出し機構4とを備える。第1乃至第3調整弁装置1041、1042、1043、第1乃至第3排気弁装置1051、1052、1053の構成は、実施の形態3で説明した弁装置と同様である。 (Embodiment 4)
FIG. 13 is an explanatory diagram conceptually showing the structure of the film forming apparatus according to the fourth embodiment. The film forming apparatus according to
更に、第1乃至第3蒸気発生部1011、1012、1013と、第1乃至第3調整弁装置1041、1042、1043との間にそれぞれ第1蒸気量検出部が設けられ、吹き出し機構4と、第1乃至第3調整弁装置1041、1042、1043との間にも、第2蒸気量検出部が設けられている。各蒸気量検出部の検出結果は制御部に入力される。
更にまた、第1乃至第3蒸気発生部1011、1012、1013には、ガラス基板Gに対して不活性ガス、例えばArなどの希ガス等からなる搬送ガスを供給する第1乃至第3搬送ガス供給管1061、1062、1063が接続され、第1乃至第3搬送ガス供給管1061、1062、1063の途中には、第1乃至第3調整弁1071、1072,1073が設けられている。 Similarly to the first embodiment, the first to
Furthermore, a first steam amount detector is provided between the first to
Furthermore, the first to third transport gases for supplying the first to third
以下、第1蒸気発生部1011側について、ステップS30~ステップS34と同様の処理を実行し、第1蒸気発生部1011側の加熱制御を停止させ、第1排気弁装置1051を閉鎖する。 Here, when an instruction to switch from the first
Thereafter, the same processing as in steps S30 to S34 is performed on the first
4 吹き出し機構
5 処理室
8 制御部(制御手段)
21 搬送路
22 排気路
23 第1蒸気量検出部
24 第2蒸気量検出部
31 調整弁装置
32 排気弁装置
41 滞留室
42 開口
43 シャッタ
61a 第1上流側温度検出部(上流側温度検出手段)
62a 第1弁温度検出部(弁温度検出手段)
63a 第1下流側温度検出部(下流側温度検出手段)
61b 第2上流側温度検出部
62b 第2弁温度検出部
63b 第2下流側温度検出部
64 材料温度検出部(温度検出手段)
71a 第1上流側加熱部(上流側加熱手段)
72a 第1弁加熱部(弁加熱手段)
73a 第1下流側加熱部(下流側加熱手段)
71b 第2上流側加熱部
72b 第2弁加熱部
73b 第2下流側加熱部
91 搬送ガス供給管
92 搬送ガス供給用調整弁
G ガラス基板(被処理基板)
DESCRIPTION OF
DESCRIPTION OF
62a 1st valve temperature detection part (valve temperature detection means)
63a 1st downstream temperature detection part (downstream temperature detection means)
61b 2nd upstream
71a First upstream heating section (upstream heating means)
72a 1st valve heating part (valve heating means)
73a 1st downstream side heating part (downstream side heating means)
71b Second upstream
Claims (9)
- 被処理基板を収容する処理室と、成膜材料を加熱することによって、該成膜材料の蒸気を発生させる蒸気発生部と、該蒸気発生部で発生させた成膜材料の蒸気を搬送ガスと共に前記処理室へ搬送するための搬送路と、前記蒸気発生部で発生させた成膜材料の蒸気を排気するための排気路と、前記搬送路の途中に設けられており、前記搬送路を開閉する第1開閉弁と、前記排気路の途中に設けられており、前記排気路を開閉する第2開閉弁とを備えた成膜装置であって、
前記蒸気発生部の温度を検出する温度検出手段と、
前記蒸気発生部から搬送される成膜材料の蒸気量を検出する蒸気量検出手段と、
成膜材料を加熱する場合、該温度検出手段にて検出された温度の高低に応じて、前記第2開閉弁の開閉動作を制御し、成膜材料を前記処理室へ搬送する場合、前記蒸気量検出手段で検出された蒸気量に応じて、前記第1及び第2開閉弁の開閉動作を制御する制御手段と
を備える成膜装置。 A processing chamber that accommodates a substrate to be processed, a vapor generation unit that generates vapor of the film formation material by heating the film formation material, and vapor of the film formation material generated in the vapor generation unit together with a carrier gas A transport path for transporting to the processing chamber, an exhaust path for exhausting the vapor of the film-forming material generated by the steam generating unit, and an intermediate part of the transport path, open and close the transport path A film-forming apparatus comprising: a first on-off valve that is provided; and a second on-off valve that is provided in the middle of the exhaust path and opens and closes the exhaust path,
Temperature detecting means for detecting the temperature of the steam generating section;
A vapor amount detecting means for detecting a vapor amount of the film forming material conveyed from the vapor generating unit;
When the film forming material is heated, the opening / closing operation of the second on-off valve is controlled in accordance with the temperature detected by the temperature detecting means, and when the film forming material is transferred to the processing chamber, the vapor A film forming apparatus comprising: control means for controlling opening and closing operations of the first and second on-off valves in accordance with the amount of steam detected by the quantity detecting means. - 前記蒸気発生部は、
成膜材料を所定温度より高い温度に加熱するようにしてあり、
前記制御手段は、
前記温度検出手段にて検出された温度が前記所定温度未満である場合、前記第1及び第2開閉弁を閉状態に制御する手段と、
前記蒸気発生部を昇温させる場合、前記温度検出手段にて検出された温度が前記所定温度以上であるとき、前記第2開閉弁を開状態に制御する手段と
を備える請求項1に記載の成膜装置。 The steam generating part is
The film forming material is heated to a temperature higher than a predetermined temperature,
The control means includes
Means for controlling the first and second on-off valves to a closed state when the temperature detected by the temperature detecting means is lower than the predetermined temperature;
2. The device according to claim 1, further comprising: a unit configured to control the second on-off valve to an open state when the temperature of the steam generation unit is increased when the temperature detected by the temperature detection unit is equal to or higher than the predetermined temperature. Deposition device. - 前記所定温度は、成膜材料の蒸発温度以下である請求項2に記載の成膜装置。 The film forming apparatus according to claim 2, wherein the predetermined temperature is equal to or lower than an evaporation temperature of the film forming material.
- 前記成膜材料は有機成膜材料であり、前記所定温度は250℃以下である請求項2に記載の成膜装置。 The film forming apparatus according to claim 2, wherein the film forming material is an organic film forming material, and the predetermined temperature is 250 ° C or lower.
- 前記第1開閉弁の下流側における前記搬送路の温度が、前記第1開閉弁の温度以上であり、前記第1開閉弁の温度が、前記第1開閉弁の上流側における前記搬送路の温度以上になるように、前記搬送路及び第1開閉弁を加熱する手段を備える
請求項1乃至請求項4のいずれか一つに記載の成膜装置。 The temperature of the conveyance path on the downstream side of the first on-off valve is equal to or higher than the temperature of the first on-off valve, and the temperature of the first on-off valve is the temperature of the conveyance path on the upstream side of the first on-off valve. The film forming apparatus according to claim 1, further comprising means for heating the transport path and the first on-off valve. - 前記第1開閉弁の上流側における前記搬送路、前記第1開閉弁、及び前記第1開閉弁の下流側における前記搬送路をそれぞれ加熱する上流側加熱手段、弁加熱手段、及び下流側加熱手段と、
前記第1開閉弁の上流側における前記搬送路、前記第1開閉弁、及び前記第1開閉弁の下流側における前記搬送路の温度をそれぞれ検出する上流側温度検出手段、弁温度検出手段、及び下流側温度検出手段と、
前記第1開閉弁の下流側における前記搬送路の温度が、前記第1開閉弁の温度以上であり、前記第1開閉弁の温度が、前記第1開閉弁の上流側における前記搬送路の温度以上になるように、前記上流側加熱手段、弁加熱手段及び下流側加熱手段の動作を制御する手段と
を備える請求項1乃至請求項4のいずれか一つに記載の成膜装置。 An upstream heating means, a valve heating means, and a downstream heating means for heating the conveyance path upstream of the first on-off valve, the first on-off valve, and the conveyance path downstream of the first on-off valve, respectively. When,
Upstream temperature detecting means for detecting the temperature of the conveying path upstream of the first on-off valve, the first on-off valve, and the temperature of the conveying path downstream of the first on-off valve, and valve temperature detecting means, and Downstream temperature detection means;
The temperature of the conveyance path on the downstream side of the first on-off valve is equal to or higher than the temperature of the first on-off valve, and the temperature of the first on-off valve is the temperature of the conveyance path on the upstream side of the first on-off valve. The film forming apparatus according to any one of claims 1 to 4, further comprising: means for controlling operations of the upstream heating means, the valve heating means, and the downstream heating means. - 前記搬送路を通じて搬送された成膜材料の蒸気を、前記処理室に収容された被処理基板へ向けて吹き出す吹き出し機構を備え、
該吹き出し機構は、
前記搬送路を通じて搬送された成膜材料の蒸気を滞留させる滞留室と、
該滞留室に滞留した蒸気を吹き出す開口と、
該開口を開閉可能に閉鎖するシャッタと
を備える請求項1乃至請求項6のいずれか一つに記載の成膜装置。 A blowing mechanism for blowing the vapor of the film forming material transferred through the transfer path toward the target substrate accommodated in the processing chamber;
The blowing mechanism is
A retention chamber for retaining vapor of the film forming material conveyed through the conveyance path;
An opening for blowing out the steam retained in the retention chamber;
The film forming apparatus according to claim 1, further comprising: a shutter that closes the opening so as to be openable and closable. - 被処理基板を収容する処理室と、成膜材料を加熱することによって、該成膜材料の蒸気を発生させる蒸気発生部と、該蒸気発生部で発生させた成膜材料の蒸気を搬送ガスと共に前記処理室へ搬送するための搬送路と、前記蒸気発生部で発生させた成膜材料の蒸気を排気するための排気路と、前記搬送路の途中に設けられており、前記搬送路を開閉する第1開閉弁と、前記排気路の途中に設けられており、前記排気路を開閉する第2開閉弁とを備えた成膜装置を用いて成膜材料の加熱を行う成膜材料供給方法であって、
前記蒸気発生部の温度を検出し、
検出された温度が所定温度未満である場合、前記第1及び第2開閉弁を閉状態にして成膜材料を加熱し、
検出された温度が前記所定温度以上である場合、前記第2開閉弁を開状態にして成膜材料を加熱し、
前記蒸気発生部から搬送される成膜材料の蒸気量を検出し、
検出された蒸気量に応じて、前記第1及び第2開閉弁の開閉動作を制御する
ことを特徴とする成膜材料供給方法。 A processing chamber that accommodates a substrate to be processed, a vapor generation unit that generates vapor of the film formation material by heating the film formation material, and vapor of the film formation material generated in the vapor generation unit together with a carrier gas A transport path for transporting to the processing chamber, an exhaust path for exhausting the vapor of the film-forming material generated by the steam generating unit, and an intermediate part of the transport path, open and close the transport path A film forming material supply method for heating a film forming material using a film forming apparatus provided with a first on-off valve for performing the operation and a second on-off valve provided in the middle of the exhaust path for opening and closing the exhaust path Because
Detecting the temperature of the steam generating section;
When the detected temperature is lower than a predetermined temperature, the film-forming material is heated by closing the first and second on-off valves,
When the detected temperature is equal to or higher than the predetermined temperature, the second on-off valve is opened to heat the film forming material,
Detecting the amount of vapor of the film forming material conveyed from the vapor generating unit,
A method for supplying a film forming material, wherein the opening and closing operations of the first and second on-off valves are controlled according to the detected amount of vapor. - 被処理基板を収容する処理室と、成膜材料を加熱することによって、該成膜材料の蒸気を発生させる複数の蒸気発生部と、該複数の蒸気発生部で発生させた成膜材料の蒸気を搬送ガスと共に前記処理室へ搬送するための複数の搬送路と、前記複数の蒸気発生部で発生させた成膜材料の蒸気を排気するための複数の排気路と、各搬送路の途中に設けられており、前記搬送路を開閉する複数の第1開閉弁と、各排気路の途中に設けられており、前記排気路を開閉する複数の第2開閉弁とを備えた成膜装置を用いて成膜材料の加熱を行う成膜材料供給方法であって、
第1の前記蒸気発生部の温度を検出し、
検出された温度が所定温度未満である場合、前記第1の蒸気発生部に係る前記第1及び第2開閉弁を閉状態にして成膜材料を加熱し、
検出された温度が前記所定温度以上である場合、前記第1の蒸気発生部に係る前記第2開閉弁を開状態にして成膜材料を加熱し、
前記第1の蒸気発生部から搬送される成膜材料の蒸気量を検出し、
検出された蒸気量に応じて、前記第1の蒸気発生部に係る前記第1及び第2開閉弁の開閉動作を制御し、
第2の前記蒸気発生部の温度を検出し、
検出された温度が所定温度未満である場合、前記第2の蒸気発生部に係る前記第1及び第2開閉弁を閉状態にして成膜材料を加熱し、
検出された温度が前記所定温度以上である場合、前記第2の蒸気発生部に係る前記第2開閉弁を開状態にして成膜材料を加熱し、
前記第2の蒸気発生部から搬送される成膜材料の蒸気量を検出し、
検出された蒸気量に応じて、前記第1の蒸気発生部に係る前記第1開閉弁を閉状態にすると共に、前記第2の蒸気発生部に係る前記第1及び第2開閉弁の開閉動作を制御する
ことを特徴とする成膜材料供給方法。
A processing chamber that accommodates the substrate to be processed, a plurality of vapor generating portions that generate vapor of the film forming material by heating the film forming material, and a vapor of the film forming material generated by the plurality of vapor generating portions In the middle of each of the transport paths, a plurality of transport paths for transporting together with the transport gas to the processing chamber, a plurality of exhaust paths for exhausting the vapor of the film forming material generated in the plurality of vapor generating sections A film-forming apparatus provided with a plurality of first on-off valves provided to open and close the transport path and a plurality of second on-off valves provided in the middle of each exhaust path to open and close the exhaust path. A film forming material supply method for heating a film forming material using,
Detecting the temperature of the first steam generation unit;
When the detected temperature is lower than a predetermined temperature, the film forming material is heated by closing the first and second on-off valves related to the first steam generation unit,
When the detected temperature is equal to or higher than the predetermined temperature, the film-forming material is heated by opening the second on-off valve related to the first steam generation unit,
Detecting the amount of vapor of the film-forming material conveyed from the first vapor generation unit;
According to the detected amount of steam, controlling the opening and closing operation of the first and second on-off valves related to the first steam generation unit,
Detecting the temperature of the second steam generation unit;
When the detected temperature is less than a predetermined temperature, the film forming material is heated by closing the first and second on-off valves related to the second steam generation unit,
When the detected temperature is equal to or higher than the predetermined temperature, the film forming material is heated by opening the second on-off valve related to the second steam generation unit,
Detecting the amount of vapor of the film forming material conveyed from the second vapor generation unit;
According to the detected amount of steam, the first on-off valve related to the first steam generation unit is closed, and the on-off operation of the first and second on-off valves related to the second steam generation unit The film-forming material supply method characterized by controlling.
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JP2014005536A (en) * | 2012-06-22 | 2014-01-16 | Samsung Display Co Ltd | Organic layer deposition apparatus, method of manufacturing organic light-emitting display apparatus using the same, and organic light-emitting display apparatus manufactured using the method |
JP2014162969A (en) * | 2013-02-27 | 2014-09-08 | Hitachi Zosen Corp | Vapor deposition apparatus and vapor deposition method |
JP2015140458A (en) * | 2014-01-29 | 2015-08-03 | シャープ株式会社 | Vapor deposition apparatus, vapor deposition method and method for manufacturing organic electroluminescence element |
JP2016108579A (en) * | 2014-12-02 | 2016-06-20 | パナソニックIpマネジメント株式会社 | Vapor deposition apparatus, and vapor deposition method |
JP2016121384A (en) * | 2014-12-25 | 2016-07-07 | パナソニックIpマネジメント株式会社 | Vapor deposition apparatus and vapor deposition method |
CN109708602A (en) * | 2017-10-26 | 2019-05-03 | 佳能特机株式会社 | Measuring device |
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