WO2011114872A1 - 成膜方法及び成膜用基板の作製方法 - Google Patents
成膜方法及び成膜用基板の作製方法 Download PDFInfo
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- WO2011114872A1 WO2011114872A1 PCT/JP2011/054530 JP2011054530W WO2011114872A1 WO 2011114872 A1 WO2011114872 A1 WO 2011114872A1 JP 2011054530 W JP2011054530 W JP 2011054530W WO 2011114872 A1 WO2011114872 A1 WO 2011114872A1
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Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/04—Coating on selected surface areas, e.g. using masks
- C23C14/048—Coating on selected surface areas, e.g. using masks using irradiation by energy or particles
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
- C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
- C23C14/12—Organic material
-
- 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
- C23C14/28—Vacuum evaporation by wave energy or particle radiation
-
- 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
- C23C14/56—Apparatus specially adapted for continuous coating; Arrangements for maintaining the vacuum, e.g. vacuum locks
- C23C14/564—Means for minimising impurities in the coating chamber such as dust, moisture, residual gases
-
- 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
-
- 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
- H10K71/40—Thermal treatment, e.g. annealing in the presence of a solvent vapour
- H10K71/421—Thermal treatment, e.g. annealing in the presence of a solvent vapour using coherent electromagnetic radiation, e.g. laser annealing
-
- 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
- H10K50/10—OLEDs or polymer light-emitting diodes [PLED]
- H10K50/11—OLEDs or polymer light-emitting diodes [PLED] characterised by the electroluminescent [EL] layers
Definitions
- the present invention relates to a film forming method and a method for manufacturing a film forming substrate.
- EL electroluminescence
- the basic structure of these light-emitting elements is such that a light-emitting layer containing a light-emitting substance is sandwiched between a pair of electrodes. By applying voltage to this element, light emission from the light-emitting substance can be obtained.
- an organic EL material layer is formed on a deposition substrate by a wet method using a polymer in which a film forming material is dispersed, and the organic EL material layer is formed by thermal transfer.
- a method of forming a film on a substrate see, for example, Patent Document 2.
- the impurities are also mixed into the light emitting layer formed on the film formation substrate by thermal transfer.
- the other light emitting layer forming method using a polymer as a binder since a wet method is used, there is a higher possibility that impurities are mixed as compared with a vacuum deposition method.
- An object of one embodiment of the present invention is to provide a film formation method that can reduce impurities mixed in a layer formed on a deposition target substrate or a method for manufacturing a film formation substrate used in the film formation method. .
- an absorption layer is formed on one surface of the first substrate.
- the material layer of the first substrate is sublimated as a pretreatment before the material layer formed on the first substrate is transferred to the second substrate to form the film.
- Heat to a lower temperature Accordingly, impurities having a low sublimation temperature can be removed from the material layer while holding the film formation material in the material layer, and the layer including the film formation material with a reduced amount of impurities is covered with the second substrate. It can be formed on the film formation surface.
- an absorption layer is formed on one surface of the first substrate.
- a film forming method is characterized in that a layer containing a material is formed.
- S shows the glass transition temperature (degreeC) of a high molecular compound
- Ta is high temperature (degreeC) among the sublimation temperature which the 1st film-forming material or the 2nd film-forming material has. Indicates.
- the material layer of the first substrate is formed of glass of a high molecular compound as a pretreatment.
- a first heat treatment for heating to a temperature lower than the transition temperature is performed. Accordingly, impurities having a low sublimation temperature can be removed from the material layer while holding the first film-forming material and the second film-forming material in the material layer, and the first composition in which the amount of impurities is reduced.
- a layer including the film material and the second film formation material can be formed over the deposition surface of the second substrate.
- each of the first heat treatment and the second heat treatment is performed by irradiating light from the other surface side of the first substrate using a light source, It is preferable to use a method in which the absorption layer is heated by absorbing light.
- an absorption layer is formed over one surface of a substrate, Forming a material layer containing a film forming material on the absorbing layer; A method for manufacturing a film formation substrate, wherein impurities in the material layer are removed by performing heat treatment on the material layer from the other surface side of the substrate at a temperature lower than a sublimation temperature of the film formation material. It is.
- an absorption layer is formed over one surface of a substrate, Forming a material layer including a first film-forming material, a second film-forming material, and a polymer compound satisfying the following formula (1) on the absorption layer; A film-forming substrate characterized in that impurities in the material layer are removed by heat-treating the material layer from the other surface side of the substrate at a temperature lower than the glass transition temperature of the polymer compound.
- This is a manufacturing method.
- Ta-100 ⁇ S ⁇ 400 shows the glass transition temperature (degreeC) of a high molecular compound
- Ta is high temperature (degreeC) among the sublimation temperature which the 1st film-forming material or the 2nd film-forming material has. Indicates.
- the heat treatment may be performed by irradiating light from the other surface side of the substrate with a light source, and the absorption layer absorbing light. It is preferable to use a heated system.
- a film formation method capable of reducing impurities mixed in a layer formed on a deposition target substrate or a method for manufacturing a film formation substrate used in this film formation method is provided. Can do.
- FIGS. 4A to 4D are cross-sectional views illustrating a film formation method of one embodiment of the present invention.
- FIGS. 4A to 4C are cross-sectional views illustrating a film formation method of one embodiment of the present invention.
- FIGS. 4A to 4D are cross-sectional views illustrating a film formation method of one embodiment of the present invention.
- FIGS. 4A to 4C are cross-sectional views illustrating a film formation method of one embodiment of the present invention.
- FIG. 1A to 1D are cross-sectional views illustrating a film formation method of one embodiment of the present invention.
- an organic EL including an absorption layer 12 formed on one surface of a first substrate 11 which is a support substrate, and an organic material 15 as a film forming material on the absorption layer 12.
- a material layer (hereinafter referred to as “material layer”) 13 is formed.
- the material layer 13 contains impurities 14 such as moisture and residual solvent.
- the first substrate 11 is a substrate that transmits light for irradiating the material layer on the deposition target substrate. Therefore, the first substrate 11 is preferably a substrate having a high light transmittance. Specifically, when lamp light or laser light is used to form the material layer, it is preferable to use a substrate that transmits the light as the first substrate 11.
- a glass substrate, a quartz substrate, a plastic substrate containing an inorganic material, or the like can be used as the first substrate 11.
- the absorption layer 12 is a layer that absorbs light irradiated to heat the material layer 13 and converts it into heat. For this reason, it should just be formed in the area
- the absorption layer 12 is preferably formed of a material having a low reflectance of 70% or less with respect to the irradiated light and a high absorption rate. Moreover, it is preferable that the absorption layer 12 is formed with the material excellent in heat resistance so that itself may not change with heat.
- Examples of materials that can be used for the absorption layer 12 include metal nitrides such as titanium nitride, tantalum nitride, molybdenum nitride, tungsten nitride, chromium nitride, and manganese nitride, molybdenum, titanium, tungsten, and carbon. preferable.
- metal nitrides such as titanium nitride, tantalum nitride, molybdenum nitride, tungsten nitride, chromium nitride, and manganese nitride, molybdenum, titanium, tungsten, and carbon. preferable.
- the absorbing layer 12 can be formed using various methods.
- the absorption layer 12 can be formed by a sputtering method using a target such as molybdenum, tantalum, titanium, or tungsten, or a target using an alloy thereof.
- the absorbing layer 12 is not limited to a single layer and may be composed of a plurality of layers.
- the film thickness of the absorbing layer 12 is preferably a film thickness that does not transmit the irradiated light. Although it varies depending on the material, the film thickness is preferably 100 nm or more and 2 ⁇ m or less. In particular, by setting the thickness of the absorption layer 12 to 100 nm or more and 600 nm or less, it is possible to efficiently absorb irradiated light and generate heat.
- the absorption layer 12 may transmit a part of the irradiated light.
- a material that does not decompose even when irradiated with light is preferably used for the material layer 13.
- the “film formation temperature” refers to a temperature at which at least a part of the film formation material is transferred from the film formation substrate to the film formation substrate by the action of heat.
- the material layer 13 is a layer that is transferred to the second substrate by heating. It is a layer formed by including an organic material 15 as a film forming material to be formed on a film formation substrate. In the present embodiment, one kind of organic material 15 is used as the film forming material included in the material layer 13, but two or more kinds of organic materials can also be used as the film forming material.
- the material layer 13 may be a single layer or a plurality of layers may be stacked. Note that in this embodiment mode, transfer means that the organic material 15 contained in the material layer 13 is transferred onto the deposition target substrate.
- the material layer 13 is formed by various methods. For example, a wet coating method such as spin coating, spray coating, ink jet, dip coating, casting, die coating, roll coating, blade coating, bar coating, gravure coating, nozzle printing or printing Can be used. Alternatively, a dry method such as a vacuum evaporation method or a sputtering method can be used.
- a wet coating method such as spin coating, spray coating, ink jet, dip coating, casting, die coating, roll coating, blade coating, bar coating, gravure coating, nozzle printing or printing Can be used.
- a dry method such as a vacuum evaporation method or a sputtering method can be used.
- a desired film forming material may be dissolved or dispersed in a solvent to prepare a solution or dispersion.
- the solvent is not particularly limited as long as it can dissolve or disperse the film forming material and does not react with the film forming material.
- halogen solvents such as chloroform, tetrachloromethane, dichloromethane, 1,2-dichloroethane, or chlorobenzene
- ketone solvents such as acetone, methyl ethyl ketone, diethyl ketone, n-propyl methyl ketone, or cyclohexanone
- benzene toluene
- Aromatic solvents such as xylene, ester solvents such as ethyl acetate, n-propyl acetate, n-butyl acetate, ethyl propionate, ⁇ -butyrolactone, or diethyl carbonate
- ether solvents such as tetrahydrofuran or dioxane, dimethylformamide
- an amide solvent such as dimethylacetamide, dimethyl sulfoxide, hexane, water, or the like can be used.
- the film thickness of the EL layer 13a formed over the second substrate 22 which is a deposition target substrate in the subsequent process is the same as that of the first substrate 11 which is a supporting substrate.
- the material layer 13 formed depends on the material layer 13 formed. Therefore, by controlling the film thickness of the material layer 13, the film thickness of the EL layer 13a formed over the second substrate 22 which is a deposition target substrate can be easily controlled.
- the material layer is not necessarily a uniform layer as long as the thickness and uniformity of the EL layer can be maintained. For example, it may be formed in a fine island shape, or may be formed in a layered structure.
- the irradiation condition at this time is set so that the organic material 15 contained in the material layer 13 is not sublimated. That is, the energy intensity is such that the material layer 13 is heated to a temperature lower than the sublimation temperature of the organic material 15. Moreover, it is preferable to set it as the energy intensity which heats the material layer 13 to 100 degreeC or more.
- the irradiated light passes through the first substrate 11 and is absorbed by the absorption layer 12.
- the material layer 13 in the region overlapping with the absorption layer 12 is heated to a temperature lower than the sublimation temperature of the organic material 15 (first heat treatment). Thereby, impurities 14 such as moisture and residual solvent in the material layer 13 are removed.
- the impurity 14 has a molecular weight of 300 or less.
- the heating temperature of the material layer 13 is 100 ° C. or higher, the impurities 14 having a molecular weight of 300 or less are sufficiently removed.
- a film formation substrate (donor substrate) 10 shown in FIG. 1C is manufactured.
- a method of forming a film by transferring the material layer 13 onto the deposition target substrate 20 using the deposition substrate 10 will be described.
- a second substrate 22 as a deposition target substrate is disposed at a position facing the surface on which the absorption layer 12 and the material layer 13 are formed.
- the second substrate 22 is a deposition target substrate on which a desired layer, for example, the electrode layer 23 is deposited by a deposition process.
- the second substrate 22 is not limited to a specific one as long as it has necessary heat resistance and has an insulating surface.
- a glass substrate, a quartz substrate, a stainless steel substrate on which an insulating film is formed, and the like can be given.
- a plastic substrate having heat resistance enough to withstand heat treatment may be used.
- the flash lamp 21 irradiates light as indicated by an arrow 21b from the back surface of the first substrate 11, that is, the surface facing the surface on which the material layer 13 is formed.
- the irradiated light passes through the first substrate 11 and is absorbed by the absorption layer 12.
- the absorbed light is converted into thermal energy, whereby the material layer 13 in a region overlapping with the absorption layer 12 is heated (second heat treatment).
- the heated material layer 13 is formed on the electrode layer 23, whereby the EL layer 13a is formed.
- the flash lamp 21 is used as the light source for the irradiation light in each of the first and second heat treatments, but various light sources can be used.
- a discharge lamp such as a xenon lamp or a metal halide lamp, or a heating lamp such as a halogen lamp or a tungsten lamp can be used as the light source.
- These light sources may be used as flash lamps (for example, xenon flash lamps, krypton flash lamps, etc.).
- the flash lamp can irradiate a large area repeatedly in a short time (0.1 ms to 10 ms), so that it can irradiate a large area efficiently and uniformly regardless of the area of the first substrate. Can be heated.
- heating of the first substrate 11 can be controlled by changing the length of time for which light is emitted.
- a laser oscillation device may be used as the light source.
- the laser light include gas lasers such as Ar laser, Kr laser, and excimer laser, single crystal YAG, YVO 4 , forsterite (Mg 2 SiO 4 ), YAlO 3 , GdVO 4 , or polycrystalline (ceramic).
- gas lasers such as Ar laser, Kr laser, and excimer laser
- a medium in which YAG, Y 2 O 3 , YVO 4 , YAlO 3 , GdVO 4 is added with one or more of Nd, Yb, Cr, Ti, Ho, Er, Tm, and Ta as dopants is used as a medium.
- Lasers, glass lasers, ruby lasers, alexandrite lasers, Ti: sapphire lasers, copper vapor lasers, or gold vapor lasers that are oscillated from one or more types can be used.
- a solid-state laser whose laser medium is solid there are advantages that a maintenance-free state can be maintained for a long time and output is relatively stable.
- infrared light wavelength 800nm or more
- heat conversion in the absorption layer 12 is efficiently performed, and the film forming material can be efficiently heated.
- each of the first and second heat treatments is preferably performed in an atmosphere with little moisture and oxygen or a reduced pressure atmosphere.
- the reduced-pressure atmosphere can be obtained by evacuating the film forming chamber so that the degree of vacuum is 5 ⁇ 10 ⁇ 3 Pa or less, preferably about 10 ⁇ 4 Pa to 10 ⁇ 6 Pa.
- the material layer 13 of the film formation substrate 10 is preliminarily processed as an organic material.
- a first heat treatment is performed to heat to a temperature lower than 15 sublimation temperature (that is, a temperature at which the material layer 13 is not transferred).
- impurities 14 such as moisture and residual solvent having a low sublimation temperature can be removed from the material layer 13, and the material layer 13 with a reduced amount of impurities can be obtained.
- the film-formation substrate 10 can be obtained (see FIG. 1C). Accordingly, impurities in the EL layer 13a, which is a layer containing the organic material 15 transferred to the deposition target substrate 20 and formed, can be reduced. Thereby, an organic EL element with high characteristics and reliability can be produced.
- the sublimation temperature is a temperature at which a state change from a solid to a substrate occurs.
- the impurity when it is a liquid, it is used to include a temperature at which a state change from a liquid to a gas occurs. That is, in this specification and the like, the sublimation temperature may include the evaporation temperature (that is, the boiling point) of the liquid.
- the second substrate 22 that is a deposition target substrate is positioned above the first substrate 11 that is a deposition substrate. It is not limited. The direction in which the substrate is installed can be set as appropriate.
- the film thickness of the EL layer 13 a formed on the deposition target substrate 20 by the film formation process is controlled by the film thickness of the material layer 13 formed on the first substrate 11. be able to. That is, since the material layer 13 formed on the film formation substrate 10 may be formed as it is, a film thickness monitor is unnecessary. Therefore, it is not necessary for the user to adjust the film formation rate using the film thickness monitor, and the film formation process can be fully automated. Therefore, productivity can be improved.
- Embodiment 2 In this embodiment, a film formation method of one embodiment of the present invention will be described. Note that in this embodiment, the case where an EL layer of a light-emitting element is formed using the film formation method of one embodiment of the present invention will be described. Note that the film formation method described in this embodiment is performed using the same materials and manufacturing methods as those in Embodiment 1 unless otherwise specified.
- FIG. 2 shows an example in which a reflective layer, a heat insulating layer, and a protective layer are formed on the first substrate.
- a reflective layer 102 is selectively formed on one surface of the first substrate 101 which is a supporting substrate.
- the reflective layer 102 has an opening 112.
- a heat insulating layer 104 is formed on the reflective layer 102.
- the heat insulating layer 104 has an opening 112 at a position overlapping with the opening of the reflective layer 102.
- an absorption layer 103 that covers the opening is formed over the first substrate 101 on which the reflective layer 102 and the heat insulating layer 104 are formed.
- a protective layer 106 is formed on the absorption layer 103.
- a material layer 105 including an organic material as a film formation material is formed over the protective layer 106.
- the material layer 105 contains impurities such as moisture and residual solvent.
- overlap means not only a case where elements (for example, a reflective layer and an absorption layer) constituting a film formation substrate are in direct contact with each other but also an overlapping layer. Including the case of overlapping.
- the reflective layer 102 is selectively formed on one surface of the first substrate 101.
- the reflective layer 102 is a layer that reflects light applied to the first substrate 101 and blocks the material layer 105 formed in a region overlapping with the reflective layer 102 so as not to apply heat. Therefore, the reflective layer 102 is preferably formed of a material having a high reflectance with respect to the light to be irradiated. Specifically, the reflective layer 102 is preferably formed of a material having a high reflectance with a reflectance of 85% or more, more preferably 90% or more, with respect to the irradiated light. .
- Examples of a material that can be used for the reflective layer 102 include aluminum, silver, gold, platinum, copper, an alloy containing aluminum (eg, an aluminum-titanium alloy, an aluminum-neodymium alloy, and an aluminum-titanium alloy), or silver.
- An alloy (silver-neodymium alloy) or the like can be used.
- the reflective layer 102 can be formed using various methods. For example, it can be formed by sputtering, electron beam vapor deposition, vacuum vapor deposition, or the like. Moreover, although the film thickness of the reflective layer 102 changes with materials, it is preferable to set it as 100 nm or more. By setting the film thickness to 100 nm or more, the irradiated light can be prevented from passing through the reflective layer 102.
- the type of material suitable for the reflective layer 102 varies depending on the wavelength of light with which the first substrate 101 is irradiated.
- the reflective layer is not limited to a single layer, and may be composed of a plurality of layers.
- the absorption layer 103 may be formed directly on the first substrate 101 without providing a reflective layer.
- the reflectance between the reflective layer 102 and the absorbing layer 103 is larger. Specifically, the difference in reflectance with respect to the wavelength of the irradiated light is 25% or more, more preferably 30% or more.
- various methods can be used for forming the opening of the reflective layer 102, but dry etching is preferably used. By using dry etching, the sidewall of the opening becomes sharp and a fine pattern can be formed.
- the heat insulating layer 104 is selectively formed on the reflective layer 102.
- the heat insulating layer 104 is a layer for suppressing the material layer 105 located in the region overlapping with the reflective layer 102 from being heated and sublimated.
- As the heat insulating layer 104 for example, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, titanium carbide, or the like can be preferably used.
- the heat insulating layer 104 is formed using a material having lower thermal conductivity than the material used for the reflective layer 102 and the absorbing layer 103.
- oxynitride is a substance having a higher oxygen content than nitrogen in its composition.
- the heat insulating layer 104 can be formed using various methods. For example, it can be formed by a sputtering method, an electron beam evaporation method, a vacuum evaporation method, a CVD (chemical vapor deposition) method, or the like. Moreover, although the film thickness of a heat insulation layer changes with materials, it is 10 nm or more and 2 micrometers or less, Preferably it can be 100 nm or more and 600 nm or less. By setting the thickness of the heat insulating layer 104 to 10 nm or more and 2 ⁇ m or less, even when the reflective layer 102 is heated, there is an effect of blocking heat conduction to the material layer 105 positioned on the reflective layer 102.
- the heat insulating layer 104 has an opening formed in a region overlapping with the opening of the reflective layer 102.
- Various methods can be used to form the pattern of the heat insulating layer 104, but dry etching is preferably used. By using dry etching, the patterned heat insulating layer 104 has a sharp side wall, and a fine pattern can be formed.
- the sidewalls of the openings provided in the heat insulating layer 104 and the reflective layer 102 can be aligned, and a finer pattern can be formed. This is preferable.
- the heat insulating layer 104 is formed only at a position overlapping the reflective layer 102, but the heat insulating layer 104 may be formed to cover the reflective layer 102 and the opening of the reflective layer 102. In this case, the heat insulating layer 104 needs to have transparency to visible light.
- the absorption layer 103 is formed on the heat insulating layer 104.
- the absorption layer 103 can be formed using a material similar to that of the absorption layer 12 described in Embodiment 1. Note that the absorption layer 103 may be selectively formed. For example, after the absorption layer 103 is formed on the entire surface of the first substrate 101, the absorption layer 103 is patterned, and the pattern is formed in an island shape so as to cover the openings of the reflective layer 102 and the heat insulating layer 104. In this case, compared to the case where the absorption layer is formed on the entire surface, heat can be prevented from being conducted in the surface direction in the absorption layer, so that a finer EL layer pattern can be formed and a high-performance light emitting device can be realized. can do.
- the protective layer 106 is formed on the absorption layer 103.
- the protective layer 106 is formed in order to prevent a substance used for the absorption layer 103 from being sublimated and mixed as an impurity in an EL layer formed over the deposition target substrate.
- the protective layer 106 prevents the absorption layer 103 from being oxidized, altered, or deformed by heat. By forming the protective layer 106, deterioration of the absorption layer 103 can be prevented, so that the deposition substrate can be repeatedly used more frequently. Therefore, the consumption and cost of the material can be suppressed.
- Examples of the protective layer 106 include silicon nitride (SiNx), silicon nitride oxide, titanium oxide, silicon oxide, silicon oxynitride, zirconium oxide, titanium nitride, titanium carbide, or indium tin oxide (ITO: Indium Tin Oxide). Etc.
- the thickness of the protective layer 106 is preferably such that the absorbing layer 103 can be satisfactorily protected, for example, about 100 nm. Note that the protective layer 106 is not necessarily provided. Further, the protective layer 106 may be selectively formed in a portion overlapping with the absorption layer 103.
- a material layer 105 is formed on the protective layer 106.
- the material layer 105 a material layer similar to the material layer 13 described in Embodiment 1 can be used. Further, the material layer 105 may be selectively formed.
- the irradiation conditions at this time are set so that the film forming material included in the material layer 105 is not sublimated. That is, the energy intensity is such that the material layer 105 is heated to a temperature lower than the sublimation temperature of the film formation material. In addition, it is preferable to have energy intensity that heats the material layer 105 to 100 ° C. or higher.
- the irradiated light is transmitted through the first substrate 101, reflected in the region where the reflective layer 102 is formed, transmitted through the opening 112 provided in the reflective layer 102, and overlapped with the opening.
- the material layer 105 in a region overlapping with the absorption layer 103 in the region is heated to a temperature lower than the sublimation temperature of the film formation material (first heat treatment).
- impurities such as moisture and residual solvent in the material layer 105 are removed.
- This impurity has a molecular weight of 300 or less.
- the heating temperature of the material layer 105 is 100 ° C. or higher, impurities having a molecular weight of 300 or less are sufficiently removed.
- the second substrate 107 is disposed on the first substrate 101 at a position facing the surface on which the material layer 105 and the like are formed.
- an electrode layer serving as one electrode of the light-emitting element is formed over the second substrate 107.
- An end portion of the electrode layer 108 is preferably covered with an insulator 111.
- the electrode layer indicates an electrode which serves as an anode or a cathode of the light emitting element.
- the first heat treatment illustrated in FIG. 2B can be performed with the first substrate 101 and the second substrate 107 facing each other as illustrated in FIG. 2C. It is. However, in order to prevent impurities released from the heat-treated first substrate from adhering to the second substrate, the first heat treatment is performed with the second substrate facing the first substrate. It is more preferable to carry out without arranging.
- the surface of the material layer 105 and the surface of the second substrate 107 are arranged with an interval of a distance d.
- the distance d is 0 mm to 2 mm, preferably 0 mm to 0.05 mm, and more preferably 0 mm to 0.03 mm.
- the distance d is defined as the distance between the surface of the material layer 105 on the first substrate and the surface of the second substrate.
- the distance d is a material layer over the first substrate. It is defined by the distance between the surface of 105 and the outermost surface of the layer formed on the second substrate, that is, the surface of these films (conductive film or partition wall).
- light is irradiated from the back surface of the first substrate 101 by a flash lamp as indicated by an arrow 110.
- the irradiation conditions at this time are set so that the film forming material included in the material layer 105 is sublimated. That is, the energy intensity is such that the material layer 105 is heated to a temperature higher than the sublimation temperature of the film formation material.
- the irradiated light is transmitted through the first substrate 101, reflected in the region where the reflective layer 102 is formed, transmitted through the opening 112 provided in the reflective layer 102, and overlapped with the opening. Are absorbed in the absorption layer 103.
- the absorbed light is converted into thermal energy, whereby the material layer 105 in the region overlapping with the absorption layer 103 in the region is heated (second heat treatment), and the film formation material included in the material layer 105 is changed to the first.
- a film is formed on the second substrate 107.
- the EL layer 109 of the light emitting element is selectively formed over the second substrate 107.
- the heat generated in the absorption layer 103 is conducted in the surface direction and the reflective layer 102 in contact with the absorption layer may be heated. Even if the reflective layer 102 is formed using a material having a reflectance of 85% or more, some heat is absorbed depending on the amount of heat of light to be irradiated. However, in the deposition substrate in this embodiment, since the heat insulating layer 104 formed of a material with low thermal conductivity is provided between the reflective layer 102 and the material 105, the reflective layer 102 is heated. Even in this case, heat conduction to the material layer 105 can be blocked in the heat insulating layer 104. Thus, a film formation material included in the material layer 105 in a region overlapping with the opening 112 can be selectively formed over the deposition target substrate, so that the EL layer 109 having a desired pattern can be formed.
- the material layer 105 of the film formation substrate is sublimated as a pretreatment as a pretreatment.
- a first heat treatment for heating to a temperature lower than the temperature (that is, a temperature at which the material layer is not transferred) is performed. Accordingly, impurities such as moisture and residual solvent having a low sublimation temperature can be removed from the material layer 105 while the film formation material is held in the material layer 105, and the component layer 105 having the reduced amount of impurities can be obtained.
- a film substrate can be obtained (see FIG. 2B). Therefore, impurities in the EL layer 109 which is a layer containing a film formation material transferred to a film formation substrate and formed thereon can be reduced. Thereby, an organic EL element with high characteristics and reliability can be produced.
- this embodiment mode is not limited thereto. .
- the direction in which the substrate is installed can be set as appropriate.
- an absorption layer 12 is formed on one surface of the first substrate 11, and at least an organic material 15 a as a first film formation material is formed on the absorption layer 12.
- the material layer 16 contains impurities 14 such as moisture, residual solvent, and residual monomer.
- the first substrate 11 can be the same as that of the first embodiment.
- the absorption layer 12 is a layer that absorbs light irradiated to heat the material layer 16 and converts it into heat, and the same layer as in Embodiment 1 can be used.
- the absorption layer 12 may permeate
- a material that does not decompose even when irradiated with light is preferably used for the material layer 13.
- the material layer 16 is a layer that is transferred to the second substrate by heating. It is a layer formed by including an organic material 15 as a first film forming material and an organic material as a second film forming material to be formed on a deposition target substrate. In this embodiment mode, two kinds of the first film forming material and the second film forming material are used for the material layer 16, but three or more kinds of film forming materials can be used for the material layer 16.
- the material layer 16 may be a single layer or a plurality of layers may be stacked. Note that in this embodiment mode, transfer indicates that the first film formation material and the second film formation material included in the material layer 16 are transferred onto the deposition target substrate.
- the material layer 16 can be formed using a wet method.
- a desired first film-forming material, second film-forming material, and polymer compound may be dissolved or dispersed in a solvent, and a solution or dispersion liquid may be prepared.
- the solvent can dissolve or disperse the first film forming material, the second film forming material, and the polymer compound, and does not react with the first film forming material, the second film forming material, and the polymer compound. If it is a thing, it will not specifically limit.
- halogen solvents such as chloroform, tetrachloromethane, dichloromethane, 1,2-dichloroethane, or chlorobenzene
- ketone solvents such as acetone, methyl ethyl ketone, diethyl ketone, n-propyl methyl ketone, or cyclohexanone
- benzene toluene
- Aromatic solvents such as xylene, ester solvents such as ethyl acetate, n-propyl acetate, n-butyl acetate, ethyl propionate, ⁇ -butyrolactone, or diethyl carbonate
- ether solvents such as tetrahydrofuran or dioxane, dimethylformamide
- an amide solvent such as dimethylacetamide, dimethyl sulfoxide, hexane, water, or the like can be used.
- the thickness of the EL layer 16a formed over the second substrate 22 which is a deposition target substrate in the subsequent step is the same as that of the first substrate 11 which is a supporting substrate.
- the material layer 16 formed depends on the material layer 16 formed. Therefore, by controlling the film thickness of the material layer 16, the film thickness of the EL layer 16a formed over the second substrate 22 which is a deposition target substrate can be easily controlled.
- the material layer is not necessarily a uniform layer as long as the thickness and uniformity of the EL layer can be maintained. For example, it may be formed in a fine island shape, or may be formed in a layered structure.
- a light-emitting substance is used for the organic material 15a as the first film-formation material included in the material layer 16, and the second layer is formed.
- An organic compound in which a light-emitting substance is dispersed is used as a film forming material.
- the light-emitting substance for example, a fluorescent compound that emits fluorescence or a phosphorescent compound that emits phosphorescence can be used.
- the organic compound that disperses the light-emitting substance when the light-emitting substance is a fluorescent compound, a substance having a singlet excitation energy (energy difference between the ground state and the singlet excited state) larger than that of the fluorescent compound is used. preferable.
- the light-emitting substance is a phosphorescent compound
- a substance having a triplet excitation energy (energy difference between a ground state and a triplet excited state) larger than that of the phosphorescent compound is preferably used.
- the film forming material included in the material layer 16 two or more kinds of organic compounds in which the light emitting substance is dispersed may be used, or two or more kinds of light emitting substances dispersed in the organic compound may be used. Further, an organic compound in which two or more kinds of luminescent substances are dispersed and two or more kinds of luminescent substances may be used.
- a polymer compound having a glass transition temperature satisfying the following formula (1) is used. More preferably, a polymer compound having a glass transition temperature satisfying the following formula (2) is used. Note that in the following formulas (1) and (2), the sublimation temperatures of the first film-forming material and the second film-forming material are measured at the same degree of vacuum (for example, a degree of vacuum of 10 ⁇ 3 Pa).
- Ta-100 ⁇ S ⁇ 400 (1) Ta-70 ⁇ S ⁇ 400 (2)
- S shows the glass transition temperature (degreeC) of a high molecular compound
- Ta is high temperature among the sublimation temperatures of a 1st film-forming material or a 2nd film-forming material. (° C.).
- the glass transition temperature of the polymer compound 17 is in a range that satisfies the above formula (1), preferably the above formula (2), the lower temperature of the sublimation temperature of the first film-forming material or the second film-forming material. Even if it reaches, the film forming material that has reached the sublimation temperature is hardly transferred from the material layer 16. This is because the high molecular compound 17 suppresses the movement of the first film-forming material and the second film-forming material in the material layer 16. When the first sublimation temperature of the first film formation material or the second film formation material is exceeded, the first film formation material and the second film formation material can easily move in the material layer 16. And transferred onto the deposition substrate. Accordingly, there is little time difference between the transfer of the first film formation material and the transfer of the second film formation material, and an EL layer with a small concentration gradient can be formed over the deposition target substrate.
- the glass transition temperature of the polymer compound 17 is lower than the range of the above formula (1), the first film-forming material and the second film-forming material are hardly suppressed from moving in the material layer 16, The film forming material having a low sublimation temperature is transferred first, and then the film forming material having a high sublimation temperature is transferred. Further, if the glass transition temperature of the polymer compound is higher than the range of the above formula (1), the first film-forming material and the second film-forming material after the first sublimation temperature exceeds the higher temperature, The film-forming material and the second film-forming material are suppressed from moving in the material layer 16, and transfer is not easily performed.
- the polymer compound 17 a polymer compound having a glass transition temperature satisfying the above formula (1), preferably the above formula (2) is used.
- a material having a glass transition temperature of 200 ° C. is used as the polymer compound 17, and a material having a sublimation temperature of 210 ° C. and a material having a sublimation temperature of 260 ° C. are used as the first film-forming material and the second film-forming material. If so, good transfer was achieved.
- a material having a glass transition temperature of 200 ° C. is used as the polymer compound 17, and a material having a sublimation temperature of 210 ° C. and a material having a sublimation temperature of 302 ° C. are used as the first film forming material and the second film forming material. When used, good transfer was not realized. This indicates that a suitable material layer 16 is realized under the conditions matching the above formulas (1) and (2).
- the polymer compound 17 contained in the material layer 16 is preferably a cycloolefin polymer. Since the cycloolefin polymer is easily dissolved in a solvent, after the film is formed on the deposition target substrate, the cycloolefin polymer containing the first film-forming material and the second film-forming material remaining on the film-forming substrate is reused in the solvent. By dissolving, the deposition substrate can be reused. Therefore, the consumption and cost of the material can be suppressed. Further, as the polymer compound 17, olefin, vinyl, acrylic, polyimide (PI), or the like may be used, or a polymer material EL material may be used.
- polymer material EL material examples include poly (N-vinylcarbazole) (PVK) and poly (p-phenylene vinylene) (PPV).
- PVK poly (N-vinylcarbazole)
- PPV poly (p-phenylene vinylene)
- a cross-linked polymer such as an epoxy resin, an acrylic resin, or siloxane may be used.
- a polymer compound means a polymer (polymer) having a repeating structure of one or more kinds of monomers.
- the viscosity of a polymer compound is easy to adjust, the viscosity of the polymer compound solution can be freely adjusted according to the application. For example, when the material layer 16 is formed by a droplet discharge method, by increasing the viscosity of the polymer compound solution, the polymer compound does not spread on the deposition surface, and a fine pattern can be formed. it can.
- Adjustment of the viscosity of the polymer compound can be realized by adjusting the molecular weight of the polymer compound or changing the ratio of the polymer compound and the solvent. In general, as the ratio of the polymer compound increases, the viscosity of the solution increases.
- the flash lamp 21 irradiates light as indicated by an arrow 21a from the back surface of the first substrate 11, that is, the surface opposite to the surface on which the material layer 16 is formed.
- the irradiation condition at this time is set so that the polymer compound 17 is not softened. That is, the energy intensity is such that the material layer 16 is heated to a temperature lower than the glass transition temperature of the polymer compound 17. Moreover, it is preferable to set it as the energy intensity
- the irradiated light passes through the first substrate 11 and is absorbed by the absorption layer 12.
- the material layer 16 in the region overlapping with the absorption layer 12 is heated to a temperature lower than the glass transition temperature of the polymer compound 17 (first heat treatment).
- impurities 14 such as moisture, residual solvent, and residual monomer in the material layer 16 are removed.
- the impurity 14 has a molecular weight of 300 or less.
- the heating temperature of the material layer 16 is 100 ° C. or higher, the impurities 14 having a molecular weight of 300 or less are sufficiently removed.
- a film formation substrate (donor substrate) 10a shown in FIG. 3D a method of forming a film by transferring the material layer 16 onto the deposition target substrate 20 using the deposition substrate 10a will be described.
- a second substrate 22 as a deposition target substrate is disposed at a position facing the surface on which the absorption layer 12 and the material layer 16 are formed.
- a substrate similar to that in Embodiment Mode 1 can be used.
- a second heat treatment is performed from the back surface of the first substrate 11, that is, the other surface side of the first substrate 11 on which the material layer 16 is formed, whereby the first component in the material layer 16 is formed.
- a film material and a second film formation material are formed on the second substrate 22.
- the EL layer 16 a of the light emitting element is formed on the second substrate 22, and the layer 16 b having the polymer compound 17 is left on the first substrate 11.
- the second heat treatment is performed by irradiating the flash lamp 21 with light as indicated by an arrow 21b. Specifically, the irradiated light passes through the first substrate 11 and is absorbed by the absorption layer 12. The absorbed light is converted into thermal energy, whereby the material layer 16 in a region overlapping with the absorption layer 12 is heated. The heated material layer 16 is formed on the electrode layer 23, whereby the EL layer 16a is formed.
- the EL layer 16 a is formed thinner than the thickness of the material layer 16.
- a decomposition product of the polymer compound 17 may be mixed into the EL layer 16a. Therefore, the polymer compound contained in the EL layer 16a is preferably a material in which a decomposition product does not affect the characteristics of the EL layer.
- the temperature of the second heat treatment exceeds the sublimation temperatures of the first film formation material and the second film formation material, and the first film formation material and the second film formation material are sublimated. It is preferable to set it higher than the temperature within a range not exceeding 50 ° C.
- the temperature of the heat treatment here is measured on the surface of the first substrate.
- the second heat treatment it is preferable to perform the second heat treatment so that the sublimation temperature of the first film formation material and the second film formation material is higher than the highest sublimation temperature.
- the flash lamp 21 is used as the light source for the irradiation light in each of the first and second heat treatments, but various light sources may be used as in the first embodiment. it can.
- each of the first and second heat treatments is preferably performed in an atmosphere with little moisture and oxygen or a reduced pressure atmosphere.
- the reduced-pressure atmosphere can be obtained by evacuating the film forming chamber so that the degree of vacuum is 5 ⁇ 10 ⁇ 3 Pa or less, preferably about 10 ⁇ 4 Pa to 10 ⁇ 6 Pa.
- the material layer 16 of the film formation substrate 10a is polymerized as a pretreatment.
- a first heat treatment is performed by heating to a temperature lower than the glass transition temperature of the compound 17 (that is, a temperature at which the material layer 16 is not transferred).
- impurities 14 such as moisture having a low sublimation temperature, residual solvent, and residual monomer can be removed from the material layer 16 while holding the first film forming material and the second film forming material in the material layer 16.
- the deposition substrate 10a including the material layer 16 in which the amount of impurities is reduced can be obtained (see FIG. 3C).
- impurities in the EL layer 16a that is a layer including the first film-forming material and the second film-forming material which are transferred to the film-forming substrate 20 and formed can be reduced. Thereby, an organic EL element with high characteristics and reliability can be produced.
- the second substrate 22 that is a deposition target substrate is positioned above the first substrate 11 that is a deposition substrate. It is not limited. The direction in which the substrate is installed can be set as appropriate.
- Embodiment 4 a film formation method of one embodiment of the present invention will be described. Note that in this embodiment, the case where an EL layer of a light-emitting element is formed using the film formation method of one embodiment of the present invention will be described. Note that the film formation method described in this embodiment is performed using the same materials and manufacturing methods as those in Embodiment 3 unless otherwise specified.
- FIG. 4 shows an example in which a reflective layer and a heat insulating layer are formed on the first substrate.
- a reflective layer 203 is selectively formed on one surface of the first substrate 201 which is a support substrate.
- the reflective layer 203 has an opening.
- a heat insulating layer 205 is formed on the reflective layer 203.
- the heat insulating layer 205 has an opening formed at a position overlapping the opening of the reflective layer 203.
- an absorption layer 207 that covers the opening is formed over the first substrate 201 over which the reflective layer 203 and the heat insulating layer 205 are formed.
- an organic EL material layer (hereinafter, referred to as “material layer”) 209 including at least a first film formation material, a second film formation material, and a polymer compound (polymer) is formed over the absorption layer 207.
- the material layer 209 contains impurities such as moisture, residual solvent, and residual monomer.
- the reflective layer 203 is selectively formed on one surface of the first substrate 201.
- the reflective layer 203 is a layer that reflects light applied to the first substrate 201 and blocks the material layer 209 formed in a region overlapping with the reflective layer 203 so as not to apply heat. Note that the reflective layer 203 can be the same as that in Embodiment 2.
- a heat insulating layer 205 is selectively formed on the reflective layer 203.
- the heat insulating layer 205 is a layer for suppressing the material layer 209 located in the region overlapping with the reflective layer 203 from being heated and sublimated.
- the heat insulating layer 205 can be the same as that in Embodiment 2.
- an absorption layer 207 is formed on the heat insulating layer 205.
- the absorption layer 207 a layer similar to that in Embodiment 2 can be used.
- the material layer 209 is formed on the absorption layer 207.
- the material layer 209 can be the same as that in Embodiment 3.
- the energy intensity is such that the material layer 209 is heated to a temperature lower than the glass transition temperature of the polymer compound. Moreover, it is preferable to set it as the energy intensity which heats the material layer 209 to 100 degreeC or more.
- the irradiated light is transmitted through the first substrate 201, is reflected in the region where the reflective layer 203 is formed, is transmitted through the opening provided in the reflective layer 203, and overlaps the opening. Absorbed in the absorption layer 207.
- the material layer 209 in the region overlapping with the absorption layer 207 in the region is heated to a temperature lower than the glass transition temperature of the polymer compound (first heat treatment). .
- impurities such as moisture, residual solvent, and residual monomer in the material layer 209 are removed.
- This impurity has a molecular weight of 300 or less.
- the heating temperature of the material layer 209 is 100 ° C. or higher, impurities having a molecular weight of 300 or less are sufficiently removed.
- the second substrate 211 is disposed on the first substrate 201 at a position facing the surface on which the material layer 209 and the like are formed.
- an electrode layer serving as one electrode of the light-emitting element is formed over the second substrate 211. 213.
- An end portion of the electrode layer 213 is preferably covered with an insulator 215.
- the electrode layer indicates an electrode which serves as an anode or a cathode of the light emitting element.
- the first heat treatment illustrated in FIG. 4B can be performed with the first substrate 201 and the second substrate 211 facing each other as illustrated in FIG. 4C. It is. However, in order to prevent impurities released from the heat-treated first substrate from adhering to the second substrate, the first heat treatment is performed with the second substrate facing the first substrate. It is more preferable to carry out without arranging.
- the surface of the material layer 209 and the surface of the second substrate 211 are arranged with an interval of a distance d.
- the distance d can be the same as that in the second embodiment.
- the irradiation conditions at this time are set so that the first film-forming material and the second film-forming material included in the material layer 209 are sublimated. That is, the energy intensity of heating the material layer 209 to be equal to or higher than the highest sublimation temperature among the sublimation temperatures of the first film formation material and the second film formation material.
- the irradiated light is transmitted through the first substrate 201, is reflected in the region where the reflective layer 203 is formed, is transmitted through the opening provided in the reflective layer 203, and overlaps the opening. Absorbed in the absorption layer 207.
- the material layer 209 in the region overlapping with the absorption layer 207 in the region is heated (second heat treatment), and the first film formation included in the material layer 209 is performed.
- the material and the second film formation material are formed on the second substrate 211.
- the EL layer 217 of the light emitting element is selectively formed over the second substrate 211.
- the material layer 209 of the film formation substrate is preliminarily treated with glass of a high molecular compound.
- a first heat treatment for heating to a temperature lower than the transition temperature that is, a temperature at which the material layer 209 is not transferred
- impurities such as moisture, residual solvent, and residual monomer having a low sublimation temperature can be removed from the material layer 209 while holding the first film formation material and the second film formation material in the material layer 209.
- a deposition substrate including the material layer 209 in which the amount of impurities is reduced can be obtained (see FIG. 4B).
- impurities in the EL layer 217 that is a layer including the first film formation material and the second film formation material which are transferred to the deposition target substrate and formed can be reduced. Thereby, an organic EL element with high characteristics and reliability can be produced.
Abstract
Description
前記吸収層上に成膜材料を含む材料層を形成し、
前記第1の基板の他方の面側から前記材料層に前記成膜材料の昇華温度より低い温度で第1の加熱処理をすることにより、前記材料層内の不純物を除去し、
前記第1の基板の一方の面と、第2の基板の被成膜面とを対向させて配置し、
前記第1の基板の他方の面から前記材料層に第2の加熱処理をすることにより、前記第2の基板の前記被成膜面に前記成膜材料を含む層を形成することを特徴とする成膜方法である。
前記吸収層上に第1の成膜材料、第2の成膜材料及び下記式(1)を満たす高分子化合物を含む材料層を形成し、
前記第1の基板の他方の面側から前記材料層に前記高分子化合物のガラス転移温度より低い温度で第1の加熱処理をすることにより、前記材料層内の不純物を除去し、
前記第1の基板の一方の面と、第2の基板の被成膜面とを対向させて配置し、
前記第1の基板の他方の面から前記材料層に第2の加熱処理をすることにより、前記第2の基板の前記被成膜面に前記第1の成膜材料と前記第2の成膜材料とを含む層を形成することを特徴とする成膜方法である。
Ta-100≦S≦400
ただし、式(1)中、Sは高分子化合物のガラス転移温度(℃)を示し、Taは、第1の成膜材料又は第2の成膜材料の有する昇華温度のうち高い温度(℃)を示す。
前記吸収層上に成膜材料を含む材料層を形成し、
前記基板の他方の面側から材料層に前記成膜材料の昇華温度より低い温度で加熱処理をすることにより、前記材料層内の不純物を除去することを特徴とする成膜用基板の作製方法である。
前記吸収層上に第1の成膜材料、第2の成膜材料及び下記式(1)を満たす高分子化合物を含む材料層を形成し、
前記基板の他方の面側から材料層に、前記高分子化合物のガラス転移温度より低い温度で加熱処理をすることにより、前記材料層内の不純物を除去することを特徴とする成膜用基板の作製方法である。
Ta-100≦S≦400 ・・・(1)
ただし、式(1)中、Sは高分子化合物のガラス転移温度(℃)を示し、Taは、第1の成膜材料又は第2の成膜材料の有する昇華温度のうち高い温度(℃)を示す。
本実施の形態では、本発明の一態様の成膜方法について説明する。なお、本実施の形態では、本発明の一態様の成膜方法を利用して、発光素子のEL層を形成する場合について説明する。また、本実施の形態は、光源を用いて加熱処理を行う場合について説明する。図1(A)~(D)は、本発明の一態様の成膜方法を説明するための断面図である。
次に、図1(D)に示すように、この成膜用基板10を用いて材料層13を被成膜基板20上に転写して成膜する方法について説明する。
本実施の形態では、本発明の一態様の成膜方法について説明する。なお、本実施の形態では、本発明の一態様の成膜方法を利用して、発光素子のEL層を形成する場合について説明する。なお、本実施の形態に示す成膜方法において、特に記載がない場合には、実施の形態1と同様の材料及び作製方法によって行うものとする。
照射された光は、第1の基板101を透過して、反射層102が形成された領域においては反射し、反射層102に設けられた開口部112においては透過して、開口部と重なる領域の吸収層103において吸収される。吸収された光が熱エネルギーへと変換されることで、当該領域の吸収層103と重なる領域の材料層105が成膜材料の昇華温度より低い温度に加熱される(第1の加熱処理)。これにより、材料層105内の水分や残留溶媒などの不純物が除去される。なお、この不純物は、その分子量が300以下のものである。材料層105の加熱温度が100℃以上であると、分子量300以下の不純物は十分に除去される。
本実施の形態では、本発明の一態様の成膜方法について説明する。なお、本実施の形態では、本発明の一態様の成膜方法を利用して、発光素子のEL層を形成する場合について説明する。また、本実施の形態は、光源を用いて加熱処理を行う場合について説明する。図3(A)~(D)は、本発明の一態様の成膜方法を説明するための断面図であり、図1と同一部分には同一符号を付す。
Ta-70≦S≦400 ・・・(2)
ただし、式(1)、(2)中、Sは高分子化合物のガラス転移温度(℃)を示し、Taは、第1の成膜材料又は第2の成膜材料の昇華温度のうち高い温度(℃)を示す。
次に、図3(D)に示すように、この成膜用基板10aを用いて材料層16を被成膜基板20上に転写して成膜する方法について説明する。
本実施の形態では、本発明の一態様の成膜方法について説明する。なお、本実施の形態では、本発明の一態様の成膜方法を利用して、発光素子のEL層を形成する場合について説明する。なお、本実施の形態に示す成膜方法において、特に記載がない場合には、実施の形態3と同様の材料及び作製方法によって行うものとする。
11 第1の基板
12 吸収層
13,16 材料層
13a,16a EL層
14 不純物
15,15a 有機材料
16b 高分子化合物を有する層
17 高分子化合物(ポリマー)
21 フラッシュランプ
21a,21b 矢印
23,108,213 電極層
101,201 第1の基板
102,203 反射層
103,207 吸収層
104,205 断熱層
105,209 材料層
106 保護層
107,211 第2の基板
109,217 EL層
110,110a 矢印
111,215 絶縁物
Claims (6)
- 第1の基板の一方の面上に吸収層を形成し、
前記吸収層上に成膜材料を含む材料層を形成し、
前記第1の基板の他方の面側から前記材料層に前記成膜材料の昇華温度より低い温度で第1の加熱処理をすることにより、前記材料層内の不純物を除去し、
前記第1の基板の一方の面と、第2の基板の被成膜面とを対向させて配置し、
前記第1の基板の他方の面から前記材料層に第2の加熱処理をすることにより、前記第2の基板の前記被成膜面に前記成膜材料を含む層を形成することを特徴とする成膜方法。 - 第1の基板の一方の面上に吸収層を形成し、
前記吸収層上に第1の成膜材料、第2の成膜材料及び下記式(1)を満たす高分子化合物を含む材料層を形成し、
前記第1の基板の他方の面側から前記材料層に前記高分子化合物のガラス転移温度より低い温度で第1の加熱処理をすることにより、前記材料層内の不純物を除去し、
前記第1の基板の一方の面と、第2の基板の被成膜面とを対向させて配置し、
前記第1の基板の他方の面から前記材料層に第2の加熱処理をすることにより、前記第2の基板の前記被成膜面に前記第1の成膜材料と前記第2の成膜材料とを含む層を形成することを特徴とする成膜方法。
Ta-100≦S≦400 ・・・(1)
ただし、式(1)中、Sは高分子化合物のガラス転移温度(℃)を示し、Taは、第1の成膜材料又は第2の成膜材料の有する昇華温度のうち高い温度(℃)を示す。 - 請求項1又は2において、
前記第1の加熱処理及び前記第2の加熱処理それぞれは、光源を用いて前記第1の基板の他方の面側から光を照射し、前記吸収層が光を吸収することで加熱される方式を用いることを特徴とする成膜方法。 - 基板の一方の面上に吸収層を形成し、
前記吸収層上に成膜材料を含む材料層を形成し、
前記基板の他方の面側から材料層に前記成膜材料の昇華温度より低い温度で加熱処理をすることにより、前記材料層内の不純物を除去することを特徴とする成膜用基板の作製方法。 - 基板の一方の面上に吸収層を形成し、
前記吸収層上に第1の成膜材料、第2の成膜材料及び下記式(1)を満たす高分子化合物を含む材料層を形成し、
前記基板の他方の面側から材料層に、前記高分子化合物のガラス転移温度より低い温度で加熱処理をすることにより、前記材料層内の不純物を除去することを特徴とする成膜用基板の作製方法。
Ta-100≦S≦400 ・・・(1)
ただし、式(1)中、Sは高分子化合物のガラス転移温度(℃)を示し、Taは、第1の成膜材料又は第2の成膜材料の有する昇華温度のうち高い温度(℃)を示す。 - 請求項4又は5において、
前記加熱処理は、光源を用いて前記基板の他方の面側から光を照射し、前記吸収層が光を吸収することで加熱される方式を用いることを特徴とする成膜用基板の作製方法。
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KR20140140416A (ko) * | 2013-05-29 | 2014-12-09 | 삼성디스플레이 주식회사 | 유기발광 디스플레이 장치 제조방법 및 이에 따라 제조된 유기발광 디스플레이 장치 |
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JPWO2011114872A1 (ja) | 2013-06-27 |
JP5747022B2 (ja) | 2015-07-08 |
US8900675B2 (en) | 2014-12-02 |
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