WO2014123093A1 - サクションロールを用いたロール装置及び凹凸構造を有する部材の製造方法 - Google Patents
サクションロールを用いたロール装置及び凹凸構造を有する部材の製造方法 Download PDFInfo
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- WO2014123093A1 WO2014123093A1 PCT/JP2014/052477 JP2014052477W WO2014123093A1 WO 2014123093 A1 WO2014123093 A1 WO 2014123093A1 JP 2014052477 W JP2014052477 W JP 2014052477W WO 2014123093 A1 WO2014123093 A1 WO 2014123093A1
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- WO
- WIPO (PCT)
- Prior art keywords
- roll
- gas permeable
- permeable member
- coating film
- suction
- Prior art date
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- ZQZCOBSUOFHDEE-UHFFFAOYSA-N tetrapropyl silicate Chemical compound CCCO[Si](OCCC)(OCCC)OCCC ZQZCOBSUOFHDEE-UHFFFAOYSA-N 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
- 150000004867 thiadiazoles Chemical class 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229930192474 thiophene Natural products 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- MQVCTPXBBSKLFS-UHFFFAOYSA-N tri(propan-2-yloxy)-propylsilane Chemical compound CCC[Si](OC(C)C)(OC(C)C)OC(C)C MQVCTPXBBSKLFS-UHFFFAOYSA-N 0.000 description 1
- DENFJSAFJTVPJR-UHFFFAOYSA-N triethoxy(ethyl)silane Chemical compound CCO[Si](CC)(OCC)OCC DENFJSAFJTVPJR-UHFFFAOYSA-N 0.000 description 1
- JCVQKRGIASEUKR-UHFFFAOYSA-N triethoxy(phenyl)silane Chemical compound CCO[Si](OCC)(OCC)C1=CC=CC=C1 JCVQKRGIASEUKR-UHFFFAOYSA-N 0.000 description 1
- BJDLPDPRMYAOCM-UHFFFAOYSA-N triethoxy(propan-2-yl)silane Chemical compound CCO[Si](OCC)(OCC)C(C)C BJDLPDPRMYAOCM-UHFFFAOYSA-N 0.000 description 1
- NBXZNTLFQLUFES-UHFFFAOYSA-N triethoxy(propyl)silane Chemical compound CCC[Si](OCC)(OCC)OCC NBXZNTLFQLUFES-UHFFFAOYSA-N 0.000 description 1
- ZNOCGWVLWPVKAO-UHFFFAOYSA-N trimethoxy(phenyl)silane Chemical compound CO[Si](OC)(OC)C1=CC=CC=C1 ZNOCGWVLWPVKAO-UHFFFAOYSA-N 0.000 description 1
- LGROXJWYRXANBB-UHFFFAOYSA-N trimethoxy(propan-2-yl)silane Chemical compound CO[Si](OC)(OC)C(C)C LGROXJWYRXANBB-UHFFFAOYSA-N 0.000 description 1
- HQYALQRYBUJWDH-UHFFFAOYSA-N trimethoxy(propyl)silane Chemical compound CCC[Si](OC)(OC)OC HQYALQRYBUJWDH-UHFFFAOYSA-N 0.000 description 1
- 125000000026 trimethylsilyl group Chemical group [H]C([H])([H])[Si]([*])(C([H])([H])[H])C([H])([H])[H] 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
- 239000008096 xylene Substances 0.000 description 1
- 238000004383 yellowing Methods 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052726 zirconium Inorganic materials 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H19/00—Coated paper; Coating material
- D21H19/66—Coatings characterised by a special visual effect, e.g. patterned, textured
- D21H19/68—Coatings characterised by a special visual effect, e.g. patterned, textured uneven, broken, discontinuous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/42—Moulds or cores; Details thereof or accessories therefor characterised by the shape of the moulding surface, e.g. ribs or grooves
- B29C33/424—Moulding surfaces provided with means for marking or patterning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
- B29C59/046—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts for layered or coated substantially flat surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/06—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using vacuum drums
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/10—Suction rolls, e.g. couch rolls
- D21F3/105—Covers thereof
-
- 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
- H10K50/85—Arrangements for extracting light from the devices
- H10K50/854—Arrangements for extracting light from the devices comprising scattering means
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C59/00—Surface shaping of articles, e.g. embossing; Apparatus therefor
- B29C59/02—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing
- B29C59/04—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing using rollers or endless belts
Definitions
- the present invention relates to a roll device using a suction roll and a method for producing a member having a concavo-convex structure.
- Lithography is known as a method for forming a fine pattern such as a semiconductor integrated circuit.
- the resolution of the pattern formed by the lithography method depends on the wavelength of the light source and the numerical aperture of the optical system.
- a light source having a shorter wavelength is desired.
- short wavelength light sources are expensive, and their development is not easy, and development of optical materials that transmit such short wavelength light is also necessary.
- manufacturing a large-area pattern by a conventional lithography method requires a large optical element, and is difficult both technically and economically. Therefore, a new method for forming a desired pattern having a large area has been studied.
- a nanoimprint method is known as a method for forming a fine pattern without using a conventional lithography apparatus.
- the nanoimprint method is a technology that can transfer nanometer-order patterns by sandwiching a resin between a mold and a substrate, and not only semiconductor devices but also optical members such as organic EL elements and LEDs, MEMS, and biotechnology. Practical use is expected in many fields such as chips.
- thermosetting material for example, a method of applying a resist film to a substrate, pressing it with a flat mold, and curing the resist film with a heater as described in Patent Document 1 is known.
- a nanoimprint molded article using an inorganic sol-gel material has high heat resistance and is suitable for a process involving high-temperature treatment.
- a roll press method using a replica master having a cylindrical fine uneven pattern and a press roll as described in Patent Document 2 is also known.
- sol-gel materials need to precisely control the amount of water after coating and the drying time, and mass production is not easy.
- the sol-gel material can be cured even while the sol-gel material and the mold are in close contact with each other.
- PDMS gas-permeable polydimethylsiloxane
- An object of the present invention is to provide a novel manufacturing apparatus and manufacturing method capable of mass-producing a member having a fine uneven structure with a high yield.
- a suction roll that is rotatable and has a suction force acting from the outside to the inside on the outer peripheral surface;
- a roll device comprising a gas permeable member covering an outer peripheral surface of the suction roll.
- the gas permeable member may be formed of silicone rubber.
- an uneven pattern may be formed on the surface of the gas permeable member.
- the uneven pattern of the gas permeable member may be a pattern for patterning a sol-gel material.
- the uneven pattern of the gas permeable member is an irregular uneven pattern
- the standard deviation of the uneven depth is in the range of 10 to 100 nm
- the average pitch of the unevenness is in the range of 100 to 1500 nm. May be.
- the Fourier transform image of the concavo-convex pattern of the gas permeable member may be an annular shape.
- the roll device may include a heating means for heating the suction roll.
- a water vapor permeability of the gas permeable member may be 1 ⁇ 10 ⁇ 6 [(mL ⁇ cm) / (cm 2 ⁇ s ⁇ cmHg)] or more.
- the gas permeable member may have a thickness of 10 ⁇ m to 1 cm.
- the gas permeable member may have a surface energy of 25 mN / m or less.
- the roll device may include a drive device that rotates the suction roll around the axis of the suction roll.
- the material of the said outer peripheral surface of the said suction roll may be a porous body.
- the porous body may be a ceramic.
- the outer peripheral surface of the suction roll may have a mesh shape in which suction holes are provided uniformly at equal intervals.
- curing the said coating film is provided.
- the member having the concavo-convex structure can be, for example, an optical substrate.
- the uneven pattern may be transferred to the coating film while applying the suction force to the suction roll.
- the material of the coating film may be a sol-gel material.
- the concavo-convex pattern of the gas permeable member and the coating film may be adhered while heating the coating film.
- a diffraction grating substrate having a concavo-convex surface as a member having a concavo-convex structure is produced using the method for producing a member having a concavo-convex structure of the second aspect, and the diffraction grating substrate
- a method for producing an organic EL element is provided, in which a transparent electrode, an organic layer, and a metal electrode are sequentially laminated on the uneven surface of the organic EL element to produce an organic EL element.
- the roll apparatus of the present invention includes a gas permeable member and a suction roll, so that moisture gas can be uniformly extracted from the object to be processed while urging the object to be processed with the gas permeable member.
- FIGS. 2A to 2C are diagrams conceptually showing each process for manufacturing a gas permeable member used in the method for manufacturing an optical substrate of the embodiment.
- FIG. 4 is a schematic cross-sectional view of the roll device of FIG. 3 as viewed from the AA direction.
- FIG. 4 is a schematic cross-sectional view of the roll device of FIG. 3 as viewed from the AA direction.
- it is a conceptual diagram of the optical substrate manufacturing apparatus which installs a cyclic
- the method for producing a member having a concavo-convex pattern or a concavo-convex structure mainly includes a step S0 for preparing a gas permeable member, a step S1 for producing a transfer roll having a gas permeable member, Preparation step S2 for preparing the sol-gel material, application step S3 for applying the prepared sol-gel material to the substrate, transfer step S4 for curing the coating film while bringing the gas permeable member of the transfer roll into close contact with the applied coating film, and coating A firing step S5 for firing the film is included.
- a step S0 for preparing a gas permeable member a step S1 for producing a transfer roll having a gas permeable member
- Preparation step S2 for preparing the sol-gel material
- application step S3 for applying the prepared sol-gel material to the substrate
- transfer step S4 for curing the coating film while bringing the gas permeable member of the transfer roll into close contact with the applied coating film
- the gas permeable member used as a mold is flexible and has an uneven transfer pattern on the surface.
- the gas permeable member can be produced by a gas permeable member manufacturing method described later.
- the gas permeable member is made of a rubber-based material, and silicone rubber, or a mixture or copolymer of silicone rubber and other materials is particularly preferable.
- silicone rubber examples include polyorganosiloxane, cross-linked polyorganosiloxane, polyorganosiloxane / polycarbonate copolymer, polyorganosiloxane / polyphenylene copolymer, polyorganosiloxane / polystyrene copolymer, polytrimethylsilylpropyne, poly 4-methylpentene or the like is used.
- Silicone rubber is less expensive than other resin materials, has excellent heat resistance, high thermal conductivity, elasticity, and is not easily deformed under high temperature conditions, making it suitable for uneven pattern transfer processes performed under high temperature conditions It is.
- the silicone rubber-based material has high gas and water vapor permeability, the solvent and water vapor of the transfer material can be easily transmitted.
- the water vapor permeability of the gas permeable member is preferably 1 ⁇ 10 ⁇ 6 [(mL ⁇ cm) / (cm 2 ⁇ s ⁇ cmHg)] or more.
- the surface free energy of the rubber-based material used for the gas permeable member is preferably 25 mN / m or less.
- the gas permeable member can have a length of 50 to 2000 mm, a width of 50 to 3000 mm, and a thickness of 10 ⁇ m to 1 cm, for example.
- the size of the gas permeable member can be appropriately set according to the size of the transfer roll, the size of the optical substrate to be mass-produced, the number of optical substrates to be continuously manufactured in one manufacturing process (number of lots), and the like.
- the thickness of the gas permeable member is smaller than the lower limit, the strength of the gas permeable member is decreased, and there is a possibility that the gas permeable member may be damaged during the handling of the gas permeable member.
- the concavo-convex pattern can be formed in an arbitrary shape by an arbitrary method such as a BCP method, a BKL method, or a photolithography method described later.
- the concavo-convex pattern can be an arbitrary pattern depending on the use of the optical substrate finally obtained.
- it can be a microlens array structure or a structure having functions such as light diffusion and diffraction.
- the concavo-convex pattern may be, for example, an irregular concavo-convex pattern in which the concavo-convex pitch is not uniform and the direction of the concavo-convex has no directivity.
- the average pitch of the irregularities can be in the range of 100 to 1500 nm, and more preferably in the range of 200 to 1200 nm.
- the average pitch of the unevenness is less than the lower limit, the pitch becomes too small with respect to the wavelength of visible light, so that light diffraction due to the unevenness tends to be insufficient.
- the upper limit is exceeded, the diffraction angle decreases.
- the function as an optical element such as a diffraction grating tends to be lost.
- the average value of the uneven depth distribution is preferably in the range of 20 to 200 nm, and more preferably in the range of 30 to 150 nm.
- the standard deviation of the unevenness depth is preferably 10 to 100 nm, and more preferably 15 to 75 nm.
- the average pitch of the unevenness means the average value of the unevenness pitch when the unevenness pitch on the surface where the unevenness is formed (adjacent protrusions or adjacent recesses).
- the average value of the pitch of such irregularities is as follows using a scanning probe microscope (for example, product name “E-sweep” manufactured by Hitachi High-Tech Science Co., Ltd.): Measuring method: Cantilever intermittent contact method
- Cantilever material Silicon Cantilever lever width: 40 ⁇ m
- Cantilever tip tip diameter 10 nm
- the average value of the uneven depth distribution and the standard deviation of the uneven depth can be calculated as follows.
- An unevenness analysis image is measured by using a scanning probe microscope (for example, product name “E-sweep” manufactured by Hitachi High-Tech Science Co., Ltd.) for the surface unevenness shape.
- a scanning probe microscope for example, product name “E-sweep” manufactured by Hitachi High-Tech Science Co., Ltd.
- an arbitrary 3 ⁇ m square (3 ⁇ m long, 3 ⁇ m wide) or 10 ⁇ m square (10 ⁇ m long, 10 ⁇ m wide) measurement is performed under the above-described conditions to obtain the uneven analysis image.
- region are each calculated
- the number of such measurement points varies depending on the type and setting of the measurement device used. For example, the product name “E-sweep” manufactured by Hitachi High-Tech Science Co., Ltd. is used as the measurement device. In this case, 65536 points (256 vertical points ⁇ 256 horizontal points) can be measured (measured at a resolution of 256 ⁇ 256 pixels) in a measurement area of 3 ⁇ m square.
- the measurement point P with the highest height from the surface of the transparent support substrate 1 is calculated
- a plane including the measurement point P and parallel to the surface of the transparent support substrate 1 is defined as a reference plane (horizontal plane), and the depth value from the reference plane (the height from the transparent support substrate 1 at the measurement point P is measured).
- the difference obtained by subtracting the height from the transparent support substrate 1 at each measurement point from the value) is obtained as the data of the unevenness depth.
- Such unevenness depth data can be obtained by automatically calculating with software or the like in the measuring device depending on the measuring device (for example, product name “E-sweep” manufactured by Hitachi High-Tech Science Co., Ltd.).
- the value obtained by such automatic calculation can be used as the data of the unevenness depth.
- the values that can be calculated by calculating the arithmetic mean and standard deviation thereof are the average value of the unevenness depth distribution and the standard deviation of the unevenness depth, respectively.
- Adopt as.
- the average pitch of the unevenness and the average value of the depth distribution of the unevenness can be obtained through the measurement method as described above regardless of the material of the surface on which the unevenness is formed.
- the light scattered and / or diffracted from such a concavo-convex pattern has a relatively broad wavelength band, not light of a single or narrow band wavelength, and the scattered light and / or diffracted light is directed. There is no sex and heads in all directions.
- the “irregular irregularity pattern” the Fourier transform image obtained by performing the two-dimensional fast Fourier transform processing on the irregularity analysis image obtained by analyzing the shape of the irregularity on the surface shows a circular or annular pattern. In other words, it includes such a quasi-periodic structure in which the distribution of the pitch of the projections and depressions has no directivity in the direction of the projections and depressions.
- the transparent conductive material of a diffraction substrate or solar cell used in a surface light emitting device such as an organic EL device is used.
- a suitable substrate is preferable.
- the concave / convex pattern of the master mold 38 is, for example, a method using self-organization (microphase separation) of a block copolymer described in Japanese Patent Application No.
- BCP Block (Hereinafter referred to as “Copolymer” method) and a method of forming irregularities due to wrinkles on the polymer surface by heating and cooling the polymer film on the deposited film disclosed in WO2011 / 007878A1 by the present applicants (hereinafter referred to as “BKL ( It is preferable to form the film by using the “Buckling) method”.
- BCP Block
- BKL It is preferable to form the film by using the “Buckling) method”.
- a photolithography method may be used.
- the unevenness of the master mold 38 can also be achieved by, for example, a micromachining method such as a cutting method, a direct electron beam drawing method, a particle beam beam machining method, and an operation probe machining method, and a micromachining method using self-assembly of fine particles.
- a pattern can be produced.
- any material can be used for forming the pattern.
- styrenic polymer such as polystyrene, a polyalkyl methacrylate such as polymethyl methacrylate, polyethylene oxide, polybutadiene, A block copolymer consisting of two combinations selected from the group consisting of isoprene, polyvinyl pyridine, and polylactic acid is preferred.
- the pitch and height of the pattern of the master mold 38 are arbitrary.
- the average pitch of the pattern is 100. It is preferably in the range of ⁇ 1500 nm, and more preferably in the range of 200-1200 nm. If the average pitch of the irregularities is less than the lower limit, the pitch becomes too small with respect to the wavelength of visible light, so that there is a tendency that light diffraction due to the irregularities does not occur. The function as an optical element such as a grating tends to be lost.
- the average value of the uneven depth distribution is preferably in the range of 20 to 200 nm, and more preferably in the range of 30 to 150 nm.
- the average value of the uneven depth distribution is less than the lower limit, the required diffraction tends not to occur because the height is too low with respect to the wavelength of visible light.
- the upper limit is exceeded, the diffracted light intensity is uneven.
- this concavo-convex pattern is used as an optical element for extracting light from an organic EL element, the electric field distribution inside the EL layer becomes non-uniform and the electric field concentrates on a specific location. There is a tendency that leakage is likely to occur and the life is shortened.
- the standard deviation of the depth of the unevenness is preferably in the range of 10 to 100 nm, and more preferably in the range of 15 to 75 nm.
- the standard deviation of the unevenness depth is less than the lower limit, the required diffraction tends not to occur because the height is too low with respect to the wavelength of visible light.
- the upper limit is exceeded, the diffracted light intensity is uneven.
- this concavo-convex pattern is used as an optical element for extracting light from an organic EL element, the electric field distribution inside the EL layer becomes non-uniform and the electric field concentrates on a specific location, causing leakage. Tends to occur and the lifespan tends to be shortened.
- the gas permeable member 81 to which the pattern of the master mold 38 is transferred is formed as follows.
- the main agent which is a raw material of the rubber material, and the curing agent are mixed and stirred for 10 minutes.
- a mixture of rubber materials (hereinafter also referred to as “gas permeable member raw material” as appropriate) may be diluted with a solvent such as toluene.
- the gas permeable member material is stirred, it is degassed under reduced pressure. The degassed gas permeable member raw material is applied onto the concave / convex pattern of the master mold 38 previously produced (FIG. 2B).
- any coating method such as a casting method, a doctor blade method, or a spin coating method can be used.
- the gas permeable member raw material is heated in order to cure the applied gas permeable member raw material.
- the heating temperature is preferably room temperature to 50 ° C. Heating can be performed by any means such as an oven or a hot plate.
- the cured gas permeable member raw material is peeled from the master mold 38 to obtain a gas permeable member (FIG. 2 (C)).
- the gas permeable member 81 can be manually peeled from the end of the master mold 38.
- one end of a gas permeable member 81 can be fixed to the outer peripheral surface of a suction roll, which will be described later, with an adhesive or a tape, and the gas permeable member 81 can be taken up and peeled by rotating the suction roll.
- the transfer roll 50 is produced using the peeled gas permeable member 81.
- the transfer roll 50 includes a suction roll 25 and a gas permeable member 81 wound around the outer peripheral surface of the suction roll.
- the suction roll 25 is a roll on which an attractive force acts from the outer side to the inner side on the outer peripheral surface 25a (see FIG. 4) of the roll.
- the suction roll 25 has, for example, a cylindrical roll main body, and a plurality of suction holes 69 (see FIG. 4) penetrating the peripheral wall of the roll main body are provided on the outer peripheral surface 25a of the roll main body.
- the suction hole 69 can be provided by making the outer peripheral surface 25a of the suction roll 25 a porous material such as ceramic.
- the pore diameter of the porous body is preferably 0.1 ⁇ m to 20 ⁇ m.
- the suction holes 69 may be formed by making the outer peripheral surface 25a of the suction roll 25 into a mesh shape using a punching metal or the like.
- the suction hole diameter is 0.5 to 2.0 mm and the pitch is 1 to 3 mm.
- the suction holes 69 are preferably provided at equal intervals.
- the shape of the suction hole 69 can be a circle, an ellipse, a diamond, or a slit.
- the suction roll 25 can suck the gas or object outside the roll through the suction hole 69 toward the inside of the roll. Further, the suction roll 25 may include a heater.
- the transfer roll 50 is obtained by winding and fixing the gas permeable member 81 produced as described above around the outer peripheral surface 25a (see FIG. 4) of the suction roll 25 as described above.
- the gas permeable member 81 may be fixed to the outer peripheral surface 25a of the suction roll 25 by an adhesive, a tape, or the adhesive force of the gas permeable member 81 itself, or a plurality of suction holes 69 on the outer peripheral surface 25a of the suction roll 25.
- the suction force may be fixed to the outer peripheral surface 25a of the suction roll 25 by suction.
- the gas permeable member 81 does not need to cover the entire outer peripheral surface 25a of the suction roll 25 depending on the application, and may cover only a part in the circumferential direction or a part in the axial direction as shown in FIG.
- the transfer roll 50 produced by the above method can be used in a roll apparatus 300 as shown in FIGS.
- the roll device 300 includes a transfer roll 50, a suction mechanism 65, and a drive device 67.
- the suction mechanism 65 for example, a suction pump connected to the bottom or top surface of the suction roll 25 of the transfer roll 50 via a pipe 65a can be used.
- the driving device 67 may be, for example, a motor that rotates the shaft 25c of the suction roll 25 of the transfer roll 50 via a belt or a gear.
- the inside 25b of the suction roll 25 is preferably decompressed to, for example, 10 5 Pa or less, particularly 10 3 Pa or less by the suction mechanism 65.
- the transfer roll 50 is rotatably supported by attaching the shaft 25 c of the suction roll 25 to the support base 63, and the transfer roller 50 is rotated about the shaft 25 c of the suction roll 25 by the driving device 67. be able to.
- the step (S0) for preparing the gas permeable member and the step (S1) for preparing the transfer roll may be performed before the transfer step (S4) described later, and before or after the sol-gel material adjusting step (S2). Or may be performed in parallel with the sol-gel material preparation step (S2).
- sol-gel material preparation process In the method for producing an optical substrate of the present embodiment, a sol-gel material (sol solution) used for forming a coating film to which a pattern is transferred by a sol-gel method is prepared (step S2 in FIG. 1). For example, when silica is synthesized on a substrate by a sol-gel method, a sol-gel material of a metal alkoxide (silica precursor) is prepared.
- TMOS tetramethoxysilane
- TEOS tetraethoxysilane
- tetra-i-propoxysilane tetra-n-propoxysilane
- tetra-i-butoxysilane tetra-n-butoxysilane
- tetra-n-butoxysilane tetra-n-butoxysilane
- tetra- Tetraalkoxide monomers such as sec-butoxysilane and tetra-t-butoxysilane, methyltrimethoxysilane, ethyltrimethoxysilane, propyltrimethoxysilane, isopropyltrimethoxysilane, phenyltrimethoxysilane, methyltriethoxysilane (MTES) , Ethyltriethoxysilane, propyltriethoxysilane, isopropyltriethoxysilane,
- Dialkoxide monomers polymers obtained by polymerizing these monomers in small amounts, and metal alkoxides such as composite materials in which a functional group or polymer is introduced into a part of the material.
- metal acetylacetonate, metal carboxylate, oxychloride, chloride, a mixture thereof and the like can be mentioned, but not limited thereto.
- the metal species include, but are not limited to, Ti, Sn, Al, Zn, Zr, In, and a mixture thereof in addition to Si. What mixed suitably the precursor of the said metal oxide can also be used.
- the mixing ratio can be 1: 1, for example, in a molar ratio.
- This sol-gel material produces amorphous silica by performing hydrolysis and polycondensation reactions.
- an acid such as hydrochloric acid or an alkali such as ammonia is added.
- the pH is preferably 4 or less or 10 or more.
- the amount of water to be added can be 1.5 times or more in molar ratio with respect to the metal alkoxide species.
- a material other than silica can be used as the sol-gel material.
- a Ti-based material, an ITO (indium-tin-oxide) -based material, Al 2 O 3 , ZrO 2 , ZnO, or the like can be used.
- Solvents for the sol-gel material include, for example, alcohols such as methanol, ethanol, isopropyl alcohol (IPA), butanol, aliphatic hydrocarbons such as hexane, heptane, octane, decane, cyclohexane, benzene, toluene, xylene, mesitylene, etc.
- alcohols such as methanol, ethanol, isopropyl alcohol (IPA), butanol, aliphatic hydrocarbons such as hexane, heptane, octane, decane, cyclohexane, benzene, toluene, xylene, mesitylene, etc.
- Aromatic hydrocarbons such as diethyl ether, tetrahydrofuran and dioxane, ketones such as acetone, methyl ethyl ketone, isophorone and cyclohexanone, ethers such as butoxyethyl ether, hexyloxyethyl alcohol, methoxy-2-propanol and benzyloxyethanol Alcohols, glycols such as ethylene glycol and propylene glycol, ethylene glycol dimethyl ether, diethylene glycol dimethyl ether, propylene Glycol ethers such as ethylene glycol monomethyl ether acetate, esters such as ethyl acetate, ethyl lactate and ⁇ -butyrolactone, phenols such as phenol and chlorophenol, N, N-dimethylformamide, N, N-dimethylacetamide, N- Examples include amides such as methylpyrrolidone, halogen-based solvents such
- Additives for sol-gel materials include polyethylene glycol, polyethylene oxide, hydroxypropyl cellulose, polyvinyl alcohol for viscosity adjustment, alkanolamines such as triethanolamine, which are solution stabilizers, ⁇ -diketones such as acetylacetone, and ⁇ -ketoesters. , Formamide, dimethylformamide, dioxane and the like can be used.
- a photo-curable sol-gel material may be used.
- a photoacid generator such as phosphorus hexafluoride aromatic sulfonium salt that generates an acid by light
- a ⁇ -diketone typified by acetylacetone
- the sol-gel material prepared as described above is applied on the substrate (step S3 in FIG. 1).
- Substrates made of inorganic materials such as glass, quartz and silicon substrates, polyethylene terephthalate (PET), polyethylene terephthalate (PEN), polycarbonate (PC), cycloolefin polymer (COP), polymethyl methacrylate (PMMA), polystyrene Resin substrates such as (PS), polyimide (PI), and polyarylate can be used.
- the substrate may be transparent or opaque. If the concavo-convex pattern substrate obtained from this substrate is used for the production of an organic EL element described later, the substrate is preferably a substrate having heat resistance and light resistance against UV light and the like.
- a substrate made of an inorganic material such as glass, quartz, or a silicon substrate is more preferable.
- a surface treatment or an easy-adhesion layer may be provided on the substrate, or a gas barrier layer may be provided for the purpose of preventing the ingress of gases such as moisture and oxygen.
- a coating method any coating method such as a bar coating method, a spin coating method, a spray coating method, a dip coating method, a die coating method, and an ink jet method can be used, but the sol-gel material is uniformly applied to a relatively large substrate.
- the bar coating method, the die coating method, and the spin coating method are preferable because the coating can be completed quickly before the sol-gel material is cured (gelled).
- the substrate surface including surface treatment and an easily adhesive layer, if any
- the substrate surface may be flat. Has no pattern.
- the pattern of the gas permeable member 81 is transferred to the coating film 42 using the roll device 300 shown in FIGS. 3 and 4 (step S4 in FIG. 1).
- An example of the transfer method will be described with reference to FIG.
- the transfer roll 50 of the roll apparatus 300 is shown in FIG.
- the transfer roll 50 and the substrate 40 are disposed so that the substrate 40 is positioned in contact with the transfer roll 50 and the substrate 40 is conveyed relative to the transfer roll 50.
- the transfer roll 50 By rotating the transfer roll 50 in synchronization with the conveyance of the substrate 40, the substrate 40 can be advanced in the conveyance direction while the gas permeable member 81 and the coating film 42 are brought into close contact with each other.
- the evaporation of the solvent and water in the coating film 42 further proceeds, and the coating film 42 is further cured. Further, when the coating film 42 is sucked into the transfer roll 50, the coating film 42 enters the concavo-convex pattern of the gas permeable member 81 without any gap, and the concavo-convex pattern of the gas permeable member 81 is faithfully transferred to the coating film 42. Transfer defects are suppressed.
- the coating film 42 When the gas permeable member 81 of the transfer roll 50 is brought into contact with the coating film 42, the coating film 42 may be heated. By heating, the chemical reaction of the coating film 42 and the evaporation of water and solvent generated thereby are accelerated, and the curing of the coating film 42 proceeds.
- the coating film 42 may be heated through the transfer roll 50, or the coating film 42 may be heated from the substrate 40 side or directly.
- a heating unit may be provided inside the transfer roll 50, and any heating unit can be used. A heater provided with a heater inside the transfer roll 50 is suitable, but a heater separate from the transfer roll 50 may be provided.
- any transfer roll 50 may be used as long as it can contact the gas permeable member 81 while heating the coating film 42.
- the heating temperature of the coating film 42 can be set to 40 to 150 ° C.
- the heating temperature of the transfer roll 50 can be similarly set to 40 to 150 ° C.
- the heat resistance temperature of the gas permeable member 81 made of a rubber-based material may be exceeded.
- gelation curing may proceed by irradiating light instead of heating the coating film.
- Such a roll process has the following advantages over the press type. i) Productivity is high because of the roll process. ii) Since it is a roll process, it is possible to prevent gas bubbles from being generated in the pattern or gas marks from remaining due to bumping of the solvent in the coating film 42. iii) Since the coating film 42 and the mold are in line contact, the contact pressure and the peeling force can be reduced, and it is easy to cope with an increase in area. iv) No bubbles are caught during transfer. Furthermore, in the manufacturing method of the present invention, since the flexible gas permeable member 81 is used as the mold, the gas permeable member is applied to the coating film 42 of the sol-gel material layer formed on the relatively hard substrate 40.
- the gas permeable member 81 When the concave / convex pattern 81 is brought into close contact, the gas permeable member 81 can be uniformly contacted over the entire surface of the substrate 40. Thereby, the gas-permeable member 81 is uniformly adhered to the coating film 42, and transfer defects can be suppressed.
- the coating film dries and increases in hardness during the period from the formation of the coating film 42 of the sol-gel material on the substrate 40 until the mold is brought into close contact, but in a process using a mold having no gas permeability and a roll having no suction mechanism In order to faithfully transfer the uneven pattern of the mold to the coating film, it is necessary to precisely control the drying state of the coating film and keep the viscosity of the coating film constant.
- the coating film is cured while the gas permeable member 81 (mold) and the coating film are in close contact with each other. What is necessary is just to make it closely_contact
- the mixed air is sucked into the suction roll 25 in the process of the present invention, so that pattern defects due to air mixing are suppressed.
- the gas permeable member 81 used in the manufacturing method of the present invention is elastic, there is an advantage that the mold is hardly damaged or broken even if it is rubbed or deformed during transfer.
- the gas permeable member 81 of the transfer roll 50 is peeled off from the coated film 42 after transfer. Since the mold used in the present embodiment is in a roll shape, the transfer roll 50 is automatically peeled immediately after the transfer by the rotation of the transfer roll 50. In particular, the peeling force may be smaller than that of a plate-shaped mold, and the mold can be easily peeled from the coating film 42 without the coating film 42 remaining in the mold.
- the coating film 42 is baked (step S5 in FIG. 1). By baking, the hydroxyl groups and the like contained in the coating film 42 are eliminated, and the coating film 42 becomes stronger. Firing is preferably performed at a temperature of 200 to 1200 ° C. for about 5 minutes to 6 hours.
- the coating film 42 is cured to have a structure (diffraction grating) having a concavo-convex pattern film corresponding to the concavo-convex pattern of the gas permeable member 81, that is, a sol-gel material layer (coating layer) having an irregular concavo-convex pattern on a flat substrate.
- a structure (diffraction grating) in which a film is directly formed is obtained.
- the coating film (sol-gel material layer) 42 becomes amorphous or crystalline, or a mixed state of amorphous and crystalline depending on the firing temperature and firing time.
- the hydrophobizing treatment can be performed with dimethyldichlorosilane, trimethylalkoxysilane, or the like, or trimethylsilyl such as hexamethyldisilazane.
- a method of hydrophobizing with an agent and silicone oil may be used, or a surface treatment method of metal oxide powder using supercritical carbon dioxide may be used.
- optical substrate manufacturing apparatus 100 for manufacturing an optical substrate as shown in FIG. 6 can be used.
- the optical substrate manufacturing apparatus 100 mainly includes a coating unit (coating film forming unit) 120 that applies the sol-gel material 41 on the substrate 40, a substrate transport unit 130 that transports the substrate, and gas transmission to the sol-gel material on the substrate 40.
- a transfer unit 170 that transfers the pattern of the adhesive member 81.
- the application unit 120 includes a substrate stage 34 that is movable while holding the substrate 40, and a die coater 30 that is positioned above the substrate stage and applies the sol-gel material 41 to the substrate 40.
- the substrate transport unit 130 includes a plurality of rotary rolls 36 arranged along the transport direction (from the left to the right in the drawing), and transports the substrate 40 placed thereon in the transport direction by the rotational drive of the rotary roll.
- the transfer unit 170 is provided at a predetermined position on the substrate conveyance path, and mainly includes a transfer roll 50.
- the transfer roll 50 having the structure described in FIGS. 3 and 4 can be used.
- the transfer roll 50 causes the gas permeable member 81 to contact a coating film (not shown) made of a sol-gel material formed on the substrate 40 and simultaneously sucks the coating film.
- the support roll 26 may be provided so as to face the transfer roll 50 with the substrate 40 interposed therebetween.
- the support roll 26 is rotationally driven to send the substrate 40 downstream in the substrate transport direction.
- the support roll 26 may include a heater.
- other driving means such as a moving table that supports and moves the substrate may be used.
- a heating furnace (heater) may be provided instead of the support roll 26.
- As the heating furnace for example, an infrared heater, hot air heating, or a hot plate can be used.
- the optical substrate manufacturing apparatus 100 may further be provided with a static eliminator 146 for neutralizing the substrate 40 to which the concave / convex pattern of the gas permeable member 81 is transferred downstream of the transfer unit 170.
- the optical substrate manufacturing apparatus 100 may include a control unit (not shown) that summarizes the operations of the coating unit 120, the transfer unit 170, and the substrate transport unit 130 and the overall operation of the apparatus.
- the control unit includes the substrate transport unit 130 and the transfer unit 170 so that the substrate 40 transported by the substrate transport unit 130 is transported in synchronization with the transfer roll 50 of the transfer unit 170 and the transfer unit 170. Control drive speed.
- the optical substrate manufacturing apparatus 100 further observes the concavo-convex pattern of the coating film after transferring the concavo-convex pattern of the gas permeable member 81 or an inspection apparatus that observes the thickness and state of the coating film formed by the application unit 120. An inspection device or the like can be provided.
- the die coater 30 applies the sol-gel material 41 onto the substrate while the substrate stage 34 holding the substrate 40 moves in the transport direction, so that the sol-gel material 41 is uniformly applied onto the substrate.
- the substrate 40 on which the coating film of the sol-gel material 41 is formed is transferred onto the rotary roll 36 on the upstream side of the transfer unit 170 and conveyed toward the transfer unit 170.
- the gas permeable member 81 on the outer side of the transfer roll 50 rotates and adheres to the coating film of the substrate 40 while being sucked through the suction roll.
- the uneven pattern of the gas permeable member 81 is transferred to the coating film (sol-gel material) of the substrate 40.
- the gas permeable member 81 of the transfer roll 50 is peeled off from the coating film.
- the gas permeable member 81 peeled from the coating film is neutralized by the static eliminator 144.
- the substrate 40 from which the gas permeable member 81 has been peeled is discharged by the charge eliminator 146 and exits the optical substrate manufacturing apparatus 100. In this way, the substrate 40 having the uneven pattern of the gas permeable member 81 transferred to the coating film is obtained.
- the substrate 40 on which the pattern is formed is baked in an oven or the like (not shown). The baking oven may be provided in the apparatus 100.
- the transfer roll 50 may be heated to 40 ° C. to 150 ° C., thereby promoting the chemical reaction of the coating film and the evaporation of water and solvent caused thereby, and the coating film is hardened (gelled).
- the transfer roll 50 including the gas permeable member 81 and the suction roll 25 in which the gas permeable member 81 is wound around the outer peripheral surface 25a is used.
- an annular gas permeable member 810 may be installed across two or more rolls 250 including one or more suction rolls.
- the gas permeable member 810 and the coating film 42 on the substrate 40 are brought into close contact with the most upstream roll, and the gas permeable member 810 and the coating film 42 are peeled off with the most downstream roll.
- the gas-permeable member 810 can be maintained in close contact with the coating film 42 by the distance between the most upstream roll and the most downstream roll in the substrate transport direction (a certain time).
- the suction roll is partially covered by the gas permeable member 810 by using the suction roll as all or any of the most upstream roll, the most downstream roll, and the roll in between, the suction hole
- the coating film 42 on the substrate 40 can be sucked through the gas permeable member 810. Thereby, evaporation of the solvent and water in the coating film 42 can be promoted, and the coating film can be cured.
- the “gas permeable member covering the outer peripheral surface of the suction roll” is a concept including a gas permeable member covering a part of the outer peripheral surface of the suction roll as in this example.
- the coating film 42 may be heated when the gas permeable member 810 is in close contact with the coating film 42, and by heating, the chemical reaction of the coating film 42, and the water and solvent produced thereby are removed. Evaporation is accelerated, and the coating film 42 is cured (gelled).
- a method of heating the coating film 42 for example, any one or all of the upstream roll, the most downstream roll, and the roll in between may be used as a heating roll.
- the substrate on which the pattern composed of the sol-gel material layer is formed through the roll process as described above is, for example, a diffraction grating substrate for an organic EL element, a wire grid polarizer, an antireflection film, or a photoelectric conversion surface side of a solar cell. It can be used as an optical element for providing a light confinement effect inside the solar cell. Or you may transcribe
- ⁇ Method for producing organic EL element> An example of a manufacturing method for manufacturing an organic EL element using a substrate on which a pattern composed of a sol-gel material layer is formed through a roll process as described above will be described with reference to FIG. First, in order to remove foreign substances and the like attached to a substrate on which a pattern composed of a sol-gel material layer is formed, washing is performed with a brush, and then organic substances are removed with an alkaline cleaning agent and an organic solvent. Next, as shown in FIG. 8, the transparent electrode 92 is laminated on the sol-gel material layer 42 of the substrate 40 so that the uneven structure formed on the surface of the sol-gel material layer 42 is maintained.
- the material of the transparent electrode 92 for example, indium oxide, zinc oxide, tin oxide, and indium tin oxide (ITO) that is a composite thereof, gold, platinum, silver, and copper are used. Among these, ITO is preferable from the viewpoints of transparency and conductivity.
- the thickness of the transparent electrode 92 is preferably in the range of 20 to 500 nm. If the thickness is less than the lower limit, the conductivity tends to be insufficient, and if it exceeds the upper limit, the transparency may be insufficient and the emitted EL light may not be sufficiently extracted to the outside.
- a known method such as a vapor deposition method, a sputtering method, or a spin coating method can be appropriately employed.
- the sputtering method is preferable from the viewpoint of improving adhesion, and after that, a photoresist is applied and exposed with an electrode mask pattern, and then etched with a developer to obtain a transparent electrode having a predetermined pattern.
- the substrate is exposed to a high temperature of about 300 ° C. during sputtering. It is desirable to clean the obtained transparent electrode with a brush, remove organic matter with an alkaline cleaner and an organic solvent, and then perform UV ozone treatment.
- the organic layer 94 shown in FIG. 8 is laminated on the transparent electrode 92.
- Such an organic layer 94 is not particularly limited as long as it can be used for the organic layer of the organic EL element, and a known organic layer can be appropriately used.
- Such an organic layer 94 may be a laminate of various organic thin films. For example, a laminate comprising a hole transport layer 95, a light emitting layer 96, and an electron transport layer 97 as shown in FIG. It may be.
- phthalocyanine derivatives As the material of the hole transport layer 95, phthalocyanine derivatives, naphthalocyanine derivatives, porphyrin derivatives, N, N′-bis (3-methylphenyl)-(1,1′-biphenyl) -4,4′-diamine ( Aromatic diamine compounds such as TPD) and 4,4′-bis [N- (naphthyl) -N-phenyl-amino] biphenyl ( ⁇ -NPD), oxazole, oxadiazole, triazole, imidazole, imidazolone, stilbene derivatives, Examples include pyrazoline derivatives, tetrahydroimidazole, polyarylalkanes, butadiene, 4,4 ′, 4 ′′ -tris (N- (3-methylphenyl) N-phenylamino) triphenylamine (m-MTDATA). It is not limited.
- the light emitting layer 96 is provided to recombine the holes injected from the transparent electrode 92 and the electrons injected from the metal electrode 98 to emit light.
- Materials that can be used for the light emitting layer 96 include anthracene, naphthalene, pyrene, tetracene, coronene, perylene, phthaloperylene, naphthaloperylene, diphenylbutadiene, tetraphenylbutadiene, coumarin, oxadiazole, bisbenzoxazoline, bisstyryl, cyclopentadiene, aluminum Organometallic complexes such as quinolinol complex (Alq3), tri- (p-terphenyl-4-yl) amine, 1-aryl-2,5-di (2-thienyl) pyrrole derivatives, pyran, quinacridone, rubrene, distyryl Benzene derivatives, distyrylarylene derivatives,
- the light emitting material selected from these compounds suitably.
- a material system that emits light from a spin multiplet for example, a phosphorescent material that emits phosphorescence, and a compound that includes a portion formed of these in a part of the molecule can be preferably used.
- the phosphorescent material preferably contains a heavy metal such as iridium. Even if the above-mentioned light emitting material is doped as a guest material in a host material having high carrier mobility, light can be emitted by utilizing dipole-dipole interaction (Felster mechanism) and electron exchange interaction (Dexter mechanism). good.
- the material for the electron transport layer 97 includes nitro-substituted fluorene derivatives, diphenylquinone derivatives, thiopyrandioxide derivatives, heterocyclic tetracarboxylic anhydrides such as naphthaleneperylene, carbodiimide, fluorenylidenemethane derivatives, anthraquinodimethane. And organometallic complexes such as anthrone derivatives, oxadiazole derivatives, aluminum quinolinol complexes (Alq3), and the like.
- a thiadiazole derivative in which an oxygen atom of the oxadiazole ring is substituted with a sulfur atom, or a quinoxaline derivative having a quinoxaline ring known as an electron withdrawing group can also be used as an electron transport material.
- a polymer material in which these materials are introduced into a polymer chain or these materials are used as a polymer main chain can also be used.
- the hole transport layer 95 or the electron transport layer 97 may also serve as the light emitting layer 96.
- the organic layer between the transparent electrode 92 and the metal electrode 98 is two layers.
- a metal fluoride such as lithium fluoride (LiF) or Li 2 O 3 or a metal oxide is used as an electron injection layer between the organic layer 94 and the metal electrode 98.
- a layer made of a highly active alkaline earth metal such as Ca, Ba, or Cs, an organic insulating material, or the like may be provided.
- a triazole derivative, oxadiazole derivative, imidazole derivative, polyarylalkane derivative as a hole injection layer between the organic layer 94 and the transparent electrode 92, Pyrazoline derivatives and pyrazolone derivatives, phenylenediamine derivatives, arylamine derivatives, amino-substituted chalcone derivatives, oxazole derivatives, styrylanthracene derivatives, fluorenone derivatives, hydrazone derivatives, stilbene derivatives, silazane derivatives, aniline copolymers, or conductive polymer oligomers
- a layer made of a thiophene oligomer or the like may be provided.
- the organic layer 94 is a stacked body including the hole transport layer 95, the light emitting layer 96, and the electron transport layer 97
- the thickness of the hole transport layer 95, the light emitting layer 96, and the electron transport layer 97 is 1 respectively.
- a range of ⁇ 200 nm, a range of 5 to 100 nm, and a range of 5 to 200 nm are preferable.
- a method for laminating the organic layer 94 a known method such as an evaporation method, a sputtering method, a spin coating method, or a die coating method can be appropriately employed.
- a metal electrode 98 is then laminated on the organic layer 94 as shown in FIG.
- a material of the metal electrode 98 a substance having a small work function can be used as appropriate, and is not particularly limited, and examples thereof include aluminum, MgAg, MgIn, and AlLi.
- the thickness of the metal electrode 98 is preferably in the range of 50 to 500 nm. If the thickness is less than the lower limit, the conductivity tends to decrease, and if the thickness exceeds the upper limit, it may be difficult to repair when a short circuit occurs between the electrodes.
- the metal electrode 98 can be laminated by employing a known method such as vapor deposition or sputtering. Thus, an organic EL element 200 having a structure as shown in FIG. 8 is obtained.
- the uneven pattern of the optical substrate manufactured according to the method of the present invention is formed from a metal oxide such as a sol-gel material. This is advantageous compared to a substrate on which is formed. Since the sol-gel material is excellent in mechanical strength, scratches, adhesion of foreign matter, protrusions on the transparent electrode, etc. are unlikely to occur even if the concavo-convex pattern surface is washed after forming the substrate and the transparent electrode in the manufacturing process of the organic EL element. , Device defects caused by them can be suppressed. Therefore, the organic EL element obtained by the method of the present invention is superior to the case of using a curable resin substrate in terms of the mechanical strength of the substrate having an uneven pattern.
- a substrate formed from a metal oxide such as a sol-gel material manufactured according to the method of the present invention is excellent in chemical resistance. Therefore, it is relatively corrosion resistant to the alkaline liquid and organic solvent used in the cleaning process of the substrate and the transparent electrode, and various cleaning liquids can be used. Further, as described above, an alkaline developer may be used during patterning of the transparent substrate, and the developer is also resistant to corrosion. This is advantageous compared to a curable resin substrate having a relatively low resistance to an alkaline solution.
- a substrate formed from a metal oxide such as a sol-gel material manufactured according to the method of the present invention is excellent in heat resistance. For this reason, it can endure the high temperature atmosphere of the sputtering process in the transparent electrode manufacturing process of an organic EL element. Furthermore, the substrate formed from the sol-gel material manufactured according to the method of the present invention is excellent in UV resistance and weather resistance as compared with the curable resin substrate. For this reason, it has tolerance also to the UV ozone cleaning process after transparent electrode formation.
- the organic EL element produced by the method of the present invention When the organic EL element produced by the method of the present invention is used outdoors, deterioration due to sunlight can be suppressed as compared with the case where an organic EL element using a substrate having a concavo-convex pattern formed on a curable resin is used. . Further, the cured resin as described above may deteriorate when left for a long period of time due to heat generated during light emission, and may cause yellowing or generation of gas. Although it is difficult to use, deterioration is suppressed in an organic EL element including a substrate manufactured using a sol-gel material.
- corrugated pattern is not limited to the said embodiment, Claim Modifications can be made as appropriate within the scope of the technical idea described.
- the roll device of the present invention can be used not only for the production of optical substrates but also for various applications.
- optical elements such as microlens arrays, nanoprism arrays, optical waveguides, optical components such as lenses, LEDs, and solar It can also be used in the fields of biotechnology such as manufacturing of batteries, antireflection films, semiconductor chips, patterned media, data storage, electronic paper, LSI, paper manufacturing, food manufacturing, immunoassay chips, cell culture sheets and the like.
- the gas permeable member may have a flat surface structure without an uneven pattern.
- moisture or gas is removed from the object to be processed by the suction roll while pressing or pressing the object to be processed such as a coating film by the gas permeable member. It can be used for applications such as suction through a gas permeable member.
- various materials are used as the material of the coating film depending on the application.
- Fiber-like, fine-particle (spherical) -like, and flake-like materials can be used. May be added.
- the material to be added include, but are not limited to, organic compounds (low molecular compounds, high molecular compounds), inorganic compounds (carbon materials, silicon materials, metals, metal oxides, and the like), organic-inorganic hybrid materials, and the like.
- pulp or the like can be used as a coating material for papermaking, and various food materials can be used for food production.
- the method of manufacturing a roll apparatus and a member having a concavo-convex structure according to the present invention can manufacture a member having a concavo-convex structure with high throughput while accurately and reliably transferring a fine pattern.
- the concavo-convex pattern of the member having the concavo-convex structure manufactured by the roll apparatus and the manufacturing method of the present invention is excellent in heat resistance, weather resistance and corrosion resistance, and is resistant to the manufacturing process of the element incorporating the member having the concavo-convex structure, In addition, the lifetime of these elements can be extended.
- the member having a concavo-convex structure obtained by the manufacturing method and the manufacturing apparatus of the present invention is extremely effective for various devices such as organic EL elements and solar cells, and the member having the concavo-convex structure thus obtained.
- the roll apparatus of this invention can be used not only for manufacture of an optical board
- the manufacture of concentrating films and antireflection films for solar cells and various displays the manufacture of semiconductor chips, the manufacture of tissue paper (eg drums used for web compression), and foods such as noodles Also used in manufacturing, biochips with fine channels, biochips for genome and proteome analysis, cell culture sheets (nanopyra sheets used as cell culture containers), microchips for cell sorting, etc. be able to.
Abstract
Description
前記吸引力を発生する吸引機構と、
前記サクションロールの外周面を覆うガス透過性部材とを備えるロール装置が提供される。
基板に塗膜を形成する工程と、
前記サクションロールを回転させながら、前記ガス透過性部材の前記凹凸パターンと前記塗膜を密着させて前記凹凸パターンを前記塗膜に転写する工程と、
前記塗膜を硬化する工程とを備える凹凸構造を有する部材の製造方法が提供される。前記凹凸構造を有する部材は、例えば、光学基板になり得る。
本実施形態の光学基板の製造方法及び製造装置において、モールドとして用いるガス透過性部材は、可撓性があり、表面に凹凸の転写パターンを有する。ガス透過性部材は、後述のガス透過性部材製造方法によって作製することができる。ガス透過性部材はゴム系材料からなり、特に、シリコーンゴム、またはシリコーンゴムと他の材料との混合物もしくは共重合体が好ましい。シリコーンゴムとしては、例えば、ポリオルガノシロキサン、架橋型ポリオルガノシロキサン、ポリオルガノシロキサン/ポリカーボネート共重合体、ポリオルガノシロキサン/ポリフェニレン共重合体、ポリオルガノシロキサン/ポリスチレン共重合体、ポリトリメチルシリルプロピン、ポリ4メチルペンテンなどが用いられる。シリコーンゴムは、他の樹脂材料と比べて安価で、耐熱性に優れ、熱伝導性が高く、弾性があり、高温条件下でも変形しにくいことから、高温条件下で行う凹凸パターン転写プロセスに好適である。さらに、シリコーンゴム系の材料は、ガスや水蒸気透過性が高いため、被転写材の溶媒や水蒸気を容易に透過することができる。なお、ガス透過性部材の水蒸気透過率は1×10-6[(mL・cm)/(cm2・s・cmHg)]以上が好ましい。ガス透過性部材の水蒸気透過率が前記下限より低いと、ガス透過性部材の凹凸パターンを基板上の塗膜に転写する時に、塗膜中の溶媒及び水の蒸発に時間がかかり、塗膜が硬化しない、または硬化に時間がかかる。また、ガス透過性部材に用いるゴム系材料の表面自由エネルギーは25mN/m以下が好ましい。これによりガス透過性部材の凹凸パターンを基板上の塗膜に転写するときの離形性が良好となり、転写不良を防ぐことができる。
測定方式:カンチレバー断続的接触方式
カンチレバーの材質:シリコン
カンチレバーのレバー幅:40μm
カンチレバーのチップ先端の直径:10nm
により、表面の凹凸を解析して凹凸解析画像を測定した後、かかる凹凸解析画像中における、任意の隣り合う凸部同士又は隣り合う凹部同士の間隔を100点以上測定し、その算術平均を求めることにより算出できる。
次いで、剥離したガス透過性部材81を用いて、転写ロール50を作製する。転写ロール50は、サクションロール25と、サクションロールの外周面に巻きつけられたガス透過性部材81から構成される。
本実施形態の光学基板の製造方法において、ゾルゲル法によりパターンを転写する塗膜を形成するために用いるゾルゲル材料(ゾル溶液)を調製する(図1の工程S2)。例えば、基板上に、シリカをゾルゲル法で合成する場合は、金属アルコキシド(シリカ前駆体)のゾルゲル材料を調製する。シリカの前駆体として、テトラメトキシシラン(TMOS)、テトラエトキシシラン(TEOS)、テトラ‐i‐プロポキシシラン、テトラ‐n‐プロポキシシラン、テトラ‐i‐ブトキシシラン、テトラ‐n‐ブトキシシラン、テトラ‐sec‐ブトキシシラン、テトラ‐t‐ブトキシシラン等のテトラアルコキシドモノマーや、メチルトリメトキシシラン、エチルトリメトキシシラン、プロピルトリメトキシシラン、イソプロピルトリメトキシシラン、フェニルトリメトキシシラン、メチルトリエトキシシラン(MTES)、エチルトリエトキシシラン、プロピルトリエトキシシラン、イソプロピルトリエトキシシラン、フェニルトリエトキシシラン、メチルトリプロポキシシラン、エチルトリプロポキシシラン、プロピルトリプロポキシシラン、イソプロピルトリプロポキシシラン、フェニルトリプロポキシシラン、メチルトリイソプロポキシシラン、エチルトリイソプロポキシシラン、プロピルトリイソプロポキシシラン、イソプロピルトリイソプロポキシシラン、フェニルトリイソプロポキシシラン等のトリアルコキシドモノマー、ジメチルジメトキシシラン、ジメチルジエトキシシラン、ジメチルジプロポキシシラン、ジメチルジイソプロポキシシラン、ジメチルジ-n-ブトキシシラン、ジメチルジ-i-ブトキシシラン、ジメチルジ-sec-ブトキシシラン、ジメチルジ-t-ブトキシシラン、ジエチルジメトキシシラン、ジエチルジエトキシシラン、ジエチルジプロポキシシラン、ジエチルジイソプロポキシシラン、ジエチルジ-n-ブトキシシラン、ジエチルジ-i-ブトキシシラン、ジエチルジ-sec-ブトキシシラン、ジプロピルジ-t-ブトキシシラン、ジプロピルジメトキシシラン、ジプロピルジエトキシシラン、ジプロピルジプロポキシシラン、ジプロピルジイソプロポキシシラン、ジプロピルジ-n-ブトキシシラン、ジプロピルジ-i-ブトキシシラン、ジプロピルジ-sec-ブトキシシラン、ジプロピルジ-t-ブトキシシラン、ジイソプロピルジメトキシシラン、ジイソプロピルジエトキシシラン、ジイソプロピルジプロポキシシラン、ジイソプロピルジイソプロポキシシラン、ジイソプロピルジ-n-ブトキシシラン、ジイソプロピルジ-i-ブトキシシラン、ジイソプロピルジ-sec-ブトキシシラン、ジイソプロピルジ-t-ブトキシシラン、ジフェニルジメトキシシラン、ジフェニルジエトキシシラン、ジフェニルジプロポキシシラン、ジフェニルジイソプロポキシシラン、ジフェニルジ-n-ブトキシシラン、ジフェニルジ-i-ブトキシシラン、ジフェニルジ-sec-ブトキシシラン、ジフェニルジ-t-ブトキシシラン等のジアルコキシドモノマーや、これらモノマーを少量重合したポリマー、前記材料の一部に官能基やポリマーを導入したことを特徴とする複合材料などの金属アルコキシドが挙げられる。さらに、金属アセチルアセトネート、金属カルボキシレート、オキシ塩化物、塩化物や、それらの混合物などが挙げられるが、これらに限定されない。また、金属種としては、Si以外にTi、Sn、Al、Zn、Zr、Inなどや、これらの混合物などが挙げられるが、これらに限定されない。上記酸化金属の前駆体を適宜混合したものを用いることもできる。
上記のように調製したゾルゲル材料を基板上に塗布する(図1の工程S3)。基板として、ガラスや石英、シリコン基板等の無機材料からなる基板やポリエチレンテレフタレート(PET)、ポリエチレンテレナフタレート(PEN)、ポリカーボネート(PC)、シクロオレフィンポリマー(COP)、ポリメチルメタクリレート(PMMA)、ポリスチレン(PS)、ポリイミド(PI)、ポリアリレート等の樹脂基板を用い得る。基板は透明でも不透明でもよい。この基板から得られた凹凸パターン基板を後述する有機EL素子の製造に用いるのであれば、基板は耐熱性、UV光等に対する耐光性を備える基板が望ましい。この観点から、基板として、ガラスや石英、シリコン基板等の無機材料からなる基板がより好ましい。基板上には密着性を向上させるために、表面処理や易接着層を設けるなどをしてもよいし、水分や酸素等の気体の浸入を防ぐ目的で、ガスバリア層を設けるなどしてもよい。塗布方法として、バーコート法、スピンコート法、スプレーコート法、ディップコート法、ダイコート法、インクジェット法などの任意の塗布方法を使用することができるが、比較的大面積の基板にゾルゲル材料を均一に塗布可能であること、ゾルゲル材料が硬化(ゲル化)する前に素早く塗布を完了させることができることからすれば、バーコート法、ダイコート法及びスピンコート法が好ましい。なお、後の工程でゾルゲル材料層による所望の凹凸パターンが形成されるため基板表面(表面処理や易接着層がある場合にはそれらも含めて)は平坦でよく、この基板自体は所望の凹凸パターンを有さない。
塗布工程後、図3及び4に示したロール装置300を用いてガス透過性部材81のパターンを塗膜42に転写する(図1の工程S4)。転写方法の一例について、図5を参照しながら説明する。図の簡略化のため図5にはロール装置300の転写ロール50のみを示した。図5に示すように転写ロール50の直下に基板40が接触して位置づけられるように転写ロール50及び基板40を配置し、転写ロール50に相対して基板40を搬送する。転写ロール50を基板40の搬送に同期して回転させることで、ガス透過性部材81と塗膜42を密着させながら、基板40を搬送方向に進行することができる。この際、ガス透過性部材81と塗膜42が密着している間も、塗膜42中の溶媒及びゾルゲル材料の縮合反応によって生じた水がガス透過性部材81内に拡散することができ、これにより塗膜42中の溶媒及び水の蒸発が進行し、塗膜42の硬化が進む。さらに、転写ロール50はサクションロール25による吸引機能を有しているため、サクションロール25の外周面25aの多数の吸引孔69を介してサクションロール25の外周面25aの気体または物体をサクションロール25の内側に向かって吸引することができ、それによって、塗膜42中の溶媒及び水のガス透過性部材81内への拡散が促進される。そのため、さらに塗膜42中の溶媒及び水の蒸発が進行し、塗膜42の硬化が進む。また、転写ロール50に塗膜42が吸引されることにより、ガス透過性部材81の凹凸パターンに塗膜42が隙間なく入り込み、ガス透過性部材81の凹凸パターンが忠実に塗膜42に転写され、転写不良が抑制される。
基板の塗膜(ゾルゲル材料層)42からガス透過性部材81を剥離した後、塗膜42を焼成する(図1の工程S5)。焼成により塗膜42に含まれている水酸基などが脱離して塗膜42がより強固となる。焼成は、200~1200℃の温度で、5分~6時間程度行うのが良い。こうして塗膜42は硬化してガス透過性部材81の凹凸パターンに対応する凹凸パターン膜を有する構造体(回折格子)、すなわち、平坦な基板上に不規則な凹凸パターンを有するゾルゲル材料層(塗膜)が直接形成された構造体(回折格子)が得られる。この時、塗膜(ゾルゲル材料層)42は、焼成温度、焼成時間に応じて非晶質または結晶質、または非晶質と結晶質の混合状態となる。塗膜42に光硬化性ゾルゲル材料を使用した場合、塗膜の焼成の代わりに光照射を行うことで硬化を進めてもよい。また、これらの表面に疎水化処理を行ってもよい。疎水化処理の方法は知られている方法を用いればよく、例えば、シリカ表面であれば、ジメチルジクロルシラン、トリメチルアルコキシシラン等で疎水化処理することもできるし、ヘキサメチルジシラザンなどのトリメチルシリル化剤とシリコーンオイルで疎水化処理する方法を用いてもよいし、超臨界二酸化炭素を用いた金属酸化物粉末の表面処理方法を用いてもよい。
上記実施形態の光学基板の製造方法を実施するために、例えば、図6に示すような光学基板を製造する光学基板製造装置100を使用することができる。光学基板製造装置100は、主に、基板40上にゾルゲル材料41を塗布する塗布部(塗膜形成部)120と、基板を搬送する基板搬送部130と、基板40上のゾルゲル材料にガス透過性部材81のパターンを転写する転写部170とを備える。
上記実施形態の光学基板製造装置100において、ガス透過性部材81と、ガス透過性部材81が外周面25aに巻かれたサクションロール25で構成される転写ロール50を用いているが、転写ロール50の代わりに、図7に示すように、環状のガス透過性部材810を、1個以上のサクションロールを含む2個以上のロール250に架け渡して設置してもよい。本変形形態においては、最上流のロールでガス透過性部材810と基板40上の塗膜42を密着させ、最下流のロールでガス透過性部材810と塗膜42を剥離する。これにより、基板の搬送方向の最上流のロールと最下流のロール間の距離だけ(一定時間)、ガス透過性部材810が塗膜42に密着した状態を維持することができる。
上記のようにしてロールプロセスを経てゾルゲル材料層からなるパターンが形成された基板を用いて有機EL素子を製造する製造方法の一例について、図8を参照しながら説明する。先ず、ゾルゲル材料層からなるパターンが形成された基板に付着している異物などを除去するために、ブラシで洗浄し、次いで、アルカリ性洗浄剤および有機溶剤で有機物等を除去する。次いで、図8に示すように、基板40のゾルゲル材料層42上に、透明電極92を、ゾルゲル材料層42の表面に形成されている凹凸構造が維持されるようにして積層する。透明電極92の材料としては、例えば、酸化インジウム、酸化亜鉛、酸化スズ、及びそれらの複合体であるインジウム・スズ・オキサイド(ITO)、金、白金、銀、銅が用いられる。これらの中でも、透明性と導電性の観点から、ITOが好ましい。透明電極92の厚みは20~500nmの範囲であることが好ましい。厚みが前記下限未満では、導電性が不十分となり易く、前記上限を超えると、透明性が不十分となり発光したEL光を十分に外部に取り出せなくなる可能性がある。透明電極92を積層する方法としては、蒸着法、スパッタ法、スピンコート法等の公知の方法を適宜採用することができる。これらの方法の中でも、密着性を上げるという観点から、スパッタ法が好ましく、その後、フォトレジストを塗布して電極用マスクパターンで露光した後、現像液でエッチングして所定のパターンの透明電極を得る。なお、スパッタ時には基板が300℃程度の高温に曝されることになる。得られた透明電極をブラシで洗浄し、アルカリ性洗浄剤および有機溶剤で有機物等を除去した後、UVオゾン処理することが望ましい。
30 ダイコータ、34 基板ステージ、36 回転ロール
38 マスターモールド
40 基板
41 ゾルゲル材料
42 塗膜(ゾルゲル材料層)
50 転写ロール、63 支持台、65 吸引機構、67 駆動機構
69 吸引孔
81 ガス透過性部材
92 透明電極、94 有機層、95 正孔輸送層
96 発光層、97 電子輸送層、98 金属電極
100 光学基板製造装置、144,146 除電器
120 塗布部、130 基板搬送部
170 転写部
200 有機EL素子、300 ロール装置
Claims (20)
- 回転可能であり、外周面において外から内に向かって吸引力が作用するサクションロールと、
前記吸引力を発生する吸引機構と、
前記サクションロールの外周面を覆うガス透過性部材とを備えるロール装置。 - 前記ガス透過性部材がシリコーンゴムから形成されることを特徴とする請求項1に記載のロール装置。
- 前記ガス透過性部材の表面に凹凸パターンが形成されていることを特徴とする請求項1または2に記載のロール装置。
- 前記ガス透過性部材の凹凸パターンは、ゾルゲル材料をパターン化するためのパターンである請求項3に記載のロール装置。
- 前記ガス透過性部材の凹凸パターンが不規則な凹凸パターンであり、凹凸の深さの標準偏差が10~100nmの範囲であり、凹凸の平均ピッチが100~1500nmの範囲である請求項3または4に記載のロール装置。
- 前記前記ガス透過性部材の凹凸パターンのフーリエ変換像が円環状である請求項3~5のいずれか一項に記載のロール装置。
- 前記サクションロールを加熱するための加熱手段を備える請求項1~6のいずれか一項に記載のロール装置。
- 前記ガス透過性部材の水蒸気透過率が1×10-6[(mL・cm)/(cm2・s・cmHg)]以上である請求項1~7のいずれか一項に記載のロール装置。
- 前記ガス透過性部材の厚みが10μm~1cmである請求項1~8のいずれか一項に記載のロール装置。
- 前記ガス透過性部材の表面エネルギーが25mN/m以下である請求項1~9のいずれか一項に記載のロール装置。
- 前記サクションロールを前記サクションロールの軸を中心に回転させる駆動装置を備える請求項1~10のいずれか一項に記載のロール装置。
- 前記サクションロールの前記外周面の材質が多孔質体である請求項1~11のいずれか一項に記載のロール装置。
- 前記多孔質体がセラミックである請求項12に記載のロール装置。
- 前記サクションロールの前記外周面が、等間隔で均一に吸引孔が設けられたメッシュ状である請求項1~11のいずれか一項に記載のロール装置。
- 請求項3~14のいずれか一項に記載のロール装置を用いて凹凸構造を有する部材を製造する方法であって、
基板に塗膜を形成する工程と、
前記サクションロールを回転させながら、前記ガス透過性部材の前記凹凸パターンと前記塗膜を密着させて前記凹凸パターンを前記塗膜に転写する工程と、
前記塗膜を硬化する工程とを備える凹凸構造を有する部材の製造方法。 - 前記サクションロールに前記吸引力を作用させながら、前記凹凸パターンを前記塗膜に転写する請求項15に記載の凹凸構造を有する部材の製造方法。
- 前記塗膜の材料がゾルゲル材料である請求項15または16に記載の凹凸構造を有する部材の製造方法。
- 前記塗膜を加熱しながら前記ガス透過性部材の前記凹凸パターンと前記塗膜を密着させる請求項15~17のいずれか一項に記載の凹凸構造を有する部材の製造方法。
- 前記凹凸構造を有する部材が光学基板である請求項15~18のいずれか一項に記載の凹凸構造を有する部材の製造方法。
- 請求項15~19のいずれか一項に記載の凹凸構造を有する部材の製造方法を用いて、凹凸構造を有する部材としての凹凸表面を有する回折格子基板を作製し、前記回折格子基板の凹凸表面上に、透明電極、有機層及び金属電極を、順次積層して有機EL素子を製造する有機EL素子の製造方法。
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JP2015141986A (ja) * | 2014-01-28 | 2015-08-03 | 大日本印刷株式会社 | 構造体の製造方法 |
JP2019519889A (ja) * | 2016-05-27 | 2019-07-11 | スリーエム イノベイティブ プロパティズ カンパニー | 色均一性が改善されたoledディスプレイ |
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DE102013017300A1 (de) * | 2013-10-18 | 2015-04-23 | Konrad Hornschuch Ag | Prägewalze |
JP6784487B2 (ja) | 2015-10-30 | 2020-11-11 | デクセリアルズ株式会社 | 光学体、および表示装置 |
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JP2015141986A (ja) * | 2014-01-28 | 2015-08-03 | 大日本印刷株式会社 | 構造体の製造方法 |
JP2019519889A (ja) * | 2016-05-27 | 2019-07-11 | スリーエム イノベイティブ プロパティズ カンパニー | 色均一性が改善されたoledディスプレイ |
US10991765B2 (en) | 2016-05-27 | 2021-04-27 | 3M Innovative Properties Company | Optical stack for improved color uniformity in OLED display |
Also Published As
Publication number | Publication date |
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TW201501911A (zh) | 2015-01-16 |
US20150337494A1 (en) | 2015-11-26 |
AU2014215166B2 (en) | 2016-10-20 |
CA2900452C (en) | 2017-03-28 |
JPWO2014123093A1 (ja) | 2017-02-02 |
EP2955001A1 (en) | 2015-12-16 |
AU2014215166A1 (en) | 2015-08-27 |
CA2900452A1 (en) | 2014-08-14 |
EP2955001A4 (en) | 2016-10-19 |
JP5995997B2 (ja) | 2016-09-21 |
CN105073387A (zh) | 2015-11-18 |
KR20150109468A (ko) | 2015-10-01 |
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