WO2013176146A1 - 光学部材の製造方法、光学部材、保護フィルム付き光学部材、及び光学パネルの製造方法 - Google Patents
光学部材の製造方法、光学部材、保護フィルム付き光学部材、及び光学パネルの製造方法 Download PDFInfo
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- WO2013176146A1 WO2013176146A1 PCT/JP2013/064118 JP2013064118W WO2013176146A1 WO 2013176146 A1 WO2013176146 A1 WO 2013176146A1 JP 2013064118 W JP2013064118 W JP 2013064118W WO 2013176146 A1 WO2013176146 A1 WO 2013176146A1
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- thin glass
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/04—Optical elements characterised by the material of which they are made; Optical coatings for optical elements made of organic materials, e.g. plastics
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/12—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D5/00—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures
- B05D5/06—Processes for applying liquids or other fluent materials to surfaces to obtain special surface effects, finishes or structures to obtain multicolour or other optical effects
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- 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
- B29C59/026—Surface shaping of articles, e.g. embossing; Apparatus therefor by mechanical means, e.g. pressing of layered or coated substantially flat surfaces
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- 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
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
- G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
- G02B1/11—Anti-reflection coatings
- G02B1/118—Anti-reflection coatings having sub-optical wavelength surface structures designed to provide an enhanced transmittance, e.g. moth-eye structures
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B3/00—Simple or compound lenses
- G02B3/0006—Arrays
- G02B3/0012—Arrays characterised by the manufacturing method
- G02B3/0031—Replication or moulding, e.g. hot embossing, UV-casting, injection moulding
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3025—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state
- G02B5/3058—Polarisers, i.e. arrangements capable of producing a definite output polarisation state from an unpolarised input state comprising electrically conductive elements, e.g. wire grids, conductive particles
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L21/00—Processes or apparatus adapted for the manufacture or treatment of semiconductor or solid state devices or of parts thereof
- H01L21/02—Manufacture or treatment of semiconductor devices or of parts thereof
- H01L21/027—Making masks on semiconductor bodies for further photolithographic processing not provided for in group H01L21/18 or H01L21/34
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- 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
- H05B33/02—Details
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- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
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- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/0067—Using separating agents during or after moulding; Applying separating agents on preforms or articles, e.g. to prevent sticking to each other
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24479—Structurally defined web or sheet [e.g., overall dimension, etc.] including variation in thickness
- Y10T428/24612—Composite web or sheet
Definitions
- the present invention relates to an optical member manufacturing method, an optical member, an optical member with a protective film, and an optical panel manufacturing method.
- An optical member produced by an imprint method is used for an optical panel such as a liquid crystal panel or an organic EL panel (see, for example, Patent Document 1).
- the imprint method is a method in which a concavo-convex layer onto which a concavo-convex pattern of a mold is transferred is formed on a base material by curing by sandwiching a molding material between the base material and a mold.
- the optical member include a moth-eye type antireflection member, a wire grid type polarizing member, or a lenticular lens member.
- plate glass having flatness, smoothness and low thermal expansion is preferable.
- the optical panel has been made thinner, and there is a demand for a thinner optical member.
- the base material of the optical member is thin, the plate glass as the base material is easily broken, and it is difficult to form the uneven layer.
- the present invention has been made in view of the above problems, and provides an optical member manufacturing method, an optical member, an optical member with a protective film, and an optical panel manufacturing method capable of reducing the thickness of a plate glass as a substrate. With the goal.
- a method for producing an optical member includes: It is a manufacturing method of an optical member provided with thin glass, A transfer step in which a layer of a molding material is sandwiched between the thin glass and the mold, and a concavo-convex layer formed by transferring the concavo-convex pattern of the mold is formed on the thin glass; A separation step of separating the uneven layer and the mold, In the transfer step, the thin glass is detachably coupled to the reinforcing plate.
- An optical member according to another aspect of the present invention is A thin glass, and an uneven layer provided on the thin glass,
- the sheet glass has a thickness of 0.1 mm or less.
- the optical member with a protective film according to another aspect of the present invention, It has said optical member and a protective film which protects said uneven
- mode of this invention An optical panel is manufactured using the optical member obtained by the manufacturing method of the optical member.
- an optical member manufacturing method capable of reducing the thickness of a plate glass.
- FIG. 1 is a sectional view showing a method for manufacturing an optical member according to the first embodiment of the present invention.
- the optical member of this embodiment is a moth-eye type antireflection member, and is used for manufacturing a liquid crystal panel as an optical panel.
- the optical member manufacturing method includes a step of preparing the laminated plate 1 (FIG. 1A), a step of forming a layer 6 of the molding material on the thin glass 2 of the laminated plate 1 (FIG. 1B), and a molding material.
- the manufacturing method of the optical member 10 may further include a peeling step (FIG. 1E) for peeling the thin glass 2 and the reinforcing plate 3.
- the optical member 10 provided with the thin glass 2 is obtained.
- the optical member 10 has translucency.
- the peeling process should just be performed after a transcription
- the optical member may be shipped with the reinforcing plate 3 attached.
- the laminated plate 1 includes, for example, a thin glass plate 2 and a reinforcing plate 3 that reinforces the thin glass plate 2 as shown in FIG.
- the thin glass 2 has translucency.
- the glass of the thin glass 2 include non-alkali glass, borosilicate glass, soda lime glass, high silica glass, and other oxide-based glasses mainly composed of silicon oxide.
- the oxide glass is preferably a glass having a silicon oxide content of 40% by mass to 90% by mass in terms of oxide.
- the glass of the thin glass 2 is selected according to the use of the optical member and the type of the optical panel. For example, in the case of a liquid crystal panel, glass (non-alkali glass) that does not substantially contain an alkali metal component may be used.
- the thickness of the thin glass 2 is, for example, 0.3 mm or less, more preferably 0.2 mm or less, still more preferably 0.1 mm or less, and particularly preferably 0.05 mm or less.
- board thickness of the thin glass 2 is from the viewpoint of the moldability of the thin glass 2, Preferably it is 0.0001 mm or more, More preferably, it is 0.001 mm or more, More preferably, it is 0.005 mm or more.
- the reinforcing plate 3 reinforces the thin glass 2 until the peeling operation between the reinforcing plate 3 and the thin glass 2 is performed.
- the reinforcing plate 3 is peeled off from the thin glass 2 after the transfer process and does not become a part of the optical panel.
- the reinforcing plate 3 preferably has a small difference in thermal expansion from the thin glass 2 in order to suppress unintentional peeling between the thin glass 2 and the reinforcing plate 3 due to temperature change and warpage of the laminated plate 1 due to temperature change.
- the reinforcing plate 3 preferably includes a glass plate, and preferably includes a glass plate of the same type as the thin glass plate 2.
- the temperature change of the laminated plate 1 occurs when the uneven layer 8 is formed by, for example, a thermal imprint method. In the thermal imprint method, as will be described in detail later, the laminate 1 is heated and cooled as the molding material is heated and cooled.
- the reinforcing plate 3 includes a support plate 4 and a release layer 5 formed on the support plate 4.
- the release layer 5 and the thin glass plate 2 are detachably coupled to each other by van der Waals force acting between the release layer 5 and the thin glass plate 2.
- the release layer 5 may be either a resin layer or an inorganic oxide layer.
- the reinforcing plate 3 of this embodiment is comprised with the support plate 4 and the peeling layer 5, you may be comprised only with the support plate 4.
- FIG. The support plate 4 and the thin glass plate 2 are detachably coupled to each other by van der Waals force acting between the support plate 4 and the thin glass plate 2.
- regions having different bonding forces may be provided at the interface between the support plate 4 and the thin glass plate 2. The peeling operation becomes easy.
- the reinforcing plate 3 may be a laminate of glass plates and resin layers alternately.
- the outermost resin layer is a release layer.
- the reinforcing plate 3 may include a plurality of support plates 4 and a plurality of resin layers.
- the support plate 4 supports the thin glass 2 through the release layer 5.
- the support plate 4 prevents the thin glass plate 2 from being broken by the force pressing the mold 7 against the surface of the layer 6 of the molding material.
- the support plate 4 is, for example, a glass plate, a ceramic plate, a resin plate, a semiconductor plate, or a metal plate. If the support plate 4 is a glass plate, the difference in thermal expansion between the reinforcing plate 3 and the thin glass plate 2 is small, warping of the laminated plate 1 due to temperature change, and unintentional peeling between the thin glass plate 2 and the reinforcing plate 3 due to temperature change. Can be reduced. When the support plate 4 is a resin plate or a metal plate, the reinforcing plate 3 can be easily bent and deformed, so that the reinforcing plate 3 and the thin glass plate 2 can be easily separated.
- the average linear expansion coefficient difference (absolute value) between the support plate 4 and the thin glass plate 2 is appropriately set according to the dimensional shape of the thin glass plate 2 and is preferably, for example, 35 ⁇ 10 ⁇ 7 / ° C. or less.
- the “average linear expansion coefficient” refers to an average linear expansion coefficient (JIS R 3102) in a temperature range of 50 ° C. to 300 ° C.
- the thickness of the support plate 4 is, for example, 2.0 mm or less, and preferably 0.7 mm or less. Further, the thickness of the support plate 4 is preferably 0.4 mm or more in order to reinforce the thin glass 2. The thickness of the support plate 4 may be thicker or thinner than the thin glass plate 2.
- the outer shape of the support plate 4 is preferably the same as or larger than the outer shape of the release layer 5 as shown in FIG. 1 so that the support plate 4 can support the entire release layer 5. .
- the peeling layer 5 prevents the positional deviation of the thin glass 2 until the peeling operation between the peeling layer 5 and the thin glass 2 is performed.
- the release layer 5 is easily peeled from the thin glass 2 by a peeling operation. Breakage of the thin glass 2 can be prevented, and peeling at an unintended position (between the peeling layer 5 and the support plate 4) can be prevented.
- the release layer 5 is formed so that the bonding force with the support plate 4 is relatively higher than the bonding force with the thin glass plate 2. Thereby, it is possible to prevent the laminate 1 from being peeled at an unintended position (between the release layer 5 and the support plate 4) when the peeling operation is performed.
- the resin of the release layer 5 is not particularly limited.
- examples of the resin for the release layer 5 include acrylic resin, polyolefin resin, polyurethane resin, polyimide resin, silicone resin, and polyimide silicone resin.
- acrylic resin polyolefin resin
- polyurethane resin polyurethane resin
- polyimide resin polyimide resin
- silicone resin silicone resin
- polyimide silicone resin Several types of resins can be mixed and used. Of these, silicone resins and polyimide silicone resins are preferred from the viewpoints of heat resistance and peelability.
- the thickness of the release layer 5 is not particularly limited, but when the release layer 5 is a resin layer, it is preferably 1 ⁇ m to 50 ⁇ m, more preferably 4 ⁇ m to 20 ⁇ m. By making the thickness of the release layer 5 1 ⁇ m or more, the release layer 5 is deformed so as to absorb the thickness of the bubbles and foreign matter when the bubbles and foreign matter are mixed between the release layer 5 and the thin glass plate 2. it can. On the other hand, when the thickness of the release layer 5 is 50 ⁇ m or less, it is economical because the formation time of the release layer 5 can be shortened and the resin of the release layer 5 is not used more than necessary.
- the outer shape of the release layer 5 is preferably the same as or larger than the outer shape of the thin glass 2 as shown in FIG. 1 so that the release layer 5 can support the entire thin glass 2.
- the outer shape of the peeling layer 5 is larger than the outer shape of the thin glass 2, the reinforcing plate 3 and the thin glass 2 are gradually peeled by bending and deforming the portion of the peeling layer 5 that protrudes from the thin glass 2, and peeling is performed. It is done smoothly.
- the release layer 5 may be composed of a plurality of types of resin layers.
- the “thickness of the release layer” means the total thickness of all the resin layers.
- the following methods (1) to (3) are available as a method of manufacturing the laminated plate 1.
- a flowable resin composition is applied on the support plate 4 and cured to form the release layer 5, and then the sheet glass 2 is pressure-bonded onto the release layer 5.
- a resin composition having fluidity is applied on a predetermined substrate and cured to form the release layer 5, and then the release layer 5 is released from the predetermined substrate, The thin glass 2 and the support plate 4 are sandwiched and pressed in the form.
- the resin composition is sandwiched between the thin glass plate 2 and the support plate 4 and cured to form the release layer 5.
- the bonding force between the support plate 4 and the release layer 5 is the bond between the release layer 5 and the thin glass 2. It tends to be higher than power.
- the method (2) is effective when the bonding strength of the release layer 5 after pressure bonding is low with respect to the thin glass 2 and high with respect to the support plate 4.
- the surface of the thin glass 2 or the support plate 4 may be surface-treated to make a difference in the bonding strength after the press-bonding with the release layer 5.
- the method (3) is effective when the bonding strength of the resin composition after curing is low with respect to the thin glass 2 and high with respect to the support plate 4.
- the surface of the thin glass plate 2 or the support plate 4 may be surface-treated to make a difference in the bonding strength after curing of the resin composition.
- the type of the resin composition is not particularly limited.
- the resin composition is classified into a condensation reaction type, an addition reaction type, an ultraviolet curable type, and an electron beam curable type depending on the curing mechanism, and any of them can be used.
- the addition reaction type is preferable. This is because the curing reaction is easy, the degree of peelability is good when the release layer 5 is formed, and the heat resistance is also high.
- the resin composition is classified into a solvent type, an emulsion type, and a solventless type depending on the form, and any of them can be used.
- a solventless type is preferable.
- productivity and environmental characteristics are excellent.
- bubbles do not easily remain in the release layer 5 because it does not include a solvent that causes foaming during curing when the release layer 5 is formed, that is, heat curing, ultraviolet curing, or electron beam curing. It is.
- silicone resin composition there is one containing a linear polyorganosiloxane having a vinyl group and a methyl hydrogen polysiloxane having a hydrosilyl group.
- This silicone resin composition is heated and cured in the presence of a platinum catalyst to form a silicone resin layer.
- Examples of the coating method of the resin composition include a spray coating method, a die coating method, a spin coating method, a dip coating method, a roll coating method, a bar coating method, a screen printing method, and a gravure coating method. These coating methods are appropriately selected according to the type of the resin composition.
- the coating amount of the resin composition is appropriately selected according to the type of the resin composition.
- it is preferably 1 g / m 2 to 100 g / m 2 , more preferably 5 g / m 2 to 20 g / m 2 .
- the curing conditions for the resin composition are appropriately selected according to the type of the resin composition.
- the temperature heated in the atmosphere is It is 50 ° C to 250 ° C, preferably 100 ° C to 200 ° C.
- the reaction time is 5 minutes to 60 minutes, preferably 10 minutes to 30 minutes. If the curing conditions of the resin composition are the above reaction time range and reaction temperature range, the oxidative decomposition of the silicone resin does not occur at the same time, a low molecular weight silicone component is not generated, and the silicone migration property does not increase.
- the pressure bonding is performed in a clean environment.
- a roll type, a press type, and the like as a method of pressure bonding.
- the atmosphere in which the pressure bonding is performed may be an atmospheric pressure atmosphere, but is preferably a reduced-pressure atmosphere in order to suppress mixing of bubbles.
- the temperature at which the pressure bonding is performed may be higher than room temperature, but is preferably room temperature in order to prevent deterioration of the release layer 5.
- the molding material layer 6 is formed on the thin glass plate 2.
- the reinforcing plate is applied to the thin glass plate 2. 3 may be pasted. It is only necessary that the thin glass plate 2 is reinforced by the reinforcing plate 3 in the transfer process.
- the layer 6 of the molding material is formed on the thin glass 2 but may be formed on the mold 7. In any case, in the transfer process, the layer 6 of the molding material is sandwiched between the thin glass sheet 2 and the mold 7.
- the thin glass 2 may be subjected to a surface treatment in advance in order to enhance the adhesion between the thin glass 2 and the molding material.
- a surface treatment include primer treatment, ozone treatment, plasma etching treatment, and the like.
- primer a silane coupling agent, silazane or the like is used.
- the molding material includes, for example, a photocurable resin.
- a photocurable resin the general thing used for the photoimprint method can be used.
- the photocurable resin is composed of a prepolymer, a photopolymerization initiator, and the like. Examples of the prepolymer include an acrylic monomer and a vinyl monomer in the case of the radical polymerization type, and an epoxy monomer and a vinyl ether monomer in the case of the ionic polymerization type.
- the photocurable resin is prepared in a liquid state, and is applied onto the thin glass plate 2 as shown in FIG.
- the resin coating method for example, a die coating method, a roll coating method, a gravure coating method, an ink jet printing method, a spray coating method, a spin coating method, a flow coating method, a blade coating method, a dip coating method, or the like is used.
- the molding material of this embodiment contains a photocurable resin
- it may contain a thermoplastic resin.
- a general resin used in the thermal imprinting method can be used, and examples thereof include an acrylic resin, a polycarbonate resin, and an olefin resin.
- the thermoplastic resin may be prepared in the form of a sheet and affixed on the thin glass 2, or may be prepared in the form of a solution and applied onto the thin glass 2 and dried. The thermoplastic resin may be softened by heating and then coated on the thin glass plate 2 and cooled.
- the molding material may include metal oxide particles and the like.
- the uneven layer 8 is formed by an imprint method.
- the layer 6 of the molding material is sandwiched between the thin glass 2 and the mold 7 to form the uneven layer 8 to which the uneven pattern of the mold 7 is transferred.
- the uneven pattern of the uneven layer 8 is a pattern in which the uneven pattern of the mold 7 is substantially inverted.
- the concave / convex layer 8 is formed by pressing the concave / convex pattern of the mold 7 against the surface of the molding material layer 6 containing a photocurable resin, irradiating light, and solidifying (curing) the molding material layer 6. Form.
- Examples of light that cures the photocurable resin include ultraviolet light, visible light, and infrared light.
- Examples of the ultraviolet light source include ultraviolet fluorescent lamps, ultraviolet LEDs, low-pressure mercury lamps, high-pressure mercury lamps, ultrahigh-pressure mercury lamps, xenon lamps, and carbon arc lamps.
- As a light source for visible light a visible light fluorescent lamp, a visible light incandescent lamp, a visible light LED, or the like is used.
- At least one of the mold 7 and the thin glass plate 2 is made of a light transmissive material.
- the light emitted from the light source may enter the molding material layer 6 through the transparent mold 7, for example, or may enter the molding material layer 6 through the transparent reinforcing plate 3 and the transparent thin glass plate 2. May be.
- the layer 6 of the molding material may be heated.
- the molding material layer 6 containing the thermoplastic resin is softened by heating, the mold 7 is pressed against the surface of the softened molding material layer 6, and the molding material layer 6 is cooled and solidified.
- the concave / convex layer 8 is formed.
- a heating source for example, a halogen lamp or laser
- the heating temperature is equal to or higher than the glass transition temperature of the thermoplastic resin.
- Either the step of pressing the mold 7 or the step of heating the layer 6 of the molding material may be performed first or simultaneously.
- the layer 6 of the molding material may be heated by heating the mold 7.
- the mold 7 is made of, for example, silicon, silicon oxide film, quartz glass, metal (for example, nickel, chromium), or resin (for example, polycarbonate or cyclic olefin resin). Metal and resin give the mold 7 flexibility.
- the mold 7 is molded using a master mold to reduce the manufacturing cost of the mold 7 and can be duplicated many times.
- Examples of the duplication method include an imprint method and an electroforming method.
- the master mold is manufactured by processing a substrate by, for example, a photolithography method or an electron beam drawing method.
- the mold 7 may have a plate shape as shown in FIG. 1 or an endless belt shape.
- the endless belt-shaped mold is formed by welding both end portions of a plate-shaped mold. Endless belt-shaped molds are suitable for continuous production.
- the mold 7 may be subjected to a release treatment in order to improve the release property between the mold surface and the resin.
- a release treatment examples include fluorine coat treatment and silicone coat treatment.
- the thin glass 2 is detachably coupled to the reinforcing plate 3 in the transfer process. Since the thin glass plate 2 is reinforced by the reinforcing plate 3, it is possible to prevent the thin glass plate 2 from being broken by the force of pressing the mold 7 against the surface of the layer 6 of the molding material.
- the mold 7 and the uneven layer 8 are separated. Separation of the mold 7 and the concavo-convex layer 8 is performed after the layer 6 of the molding material is solidified.
- the thin glass 2 is detachably coupled to the reinforcing plate 3 in the separation step. Since the thin glass plate 2 is reinforced by the reinforcing plate 3, it is possible to prevent the thin glass plate 2 from being broken by a force that separates the uneven layer 8 and the mold 7.
- FIG. 2 is an explanatory diagram showing a transfer process and a separation process according to the first embodiment of the present invention.
- FIG. 3 is a cross-sectional view showing a contact state between the mold and the layer of the molding material in the middle of the transfer process.
- the transfer step includes a step of pressing the mold 7 against the layer 6 of the molding material while supporting the thin glass 2 flat and curving a part of the mold 7.
- the separation step includes a step of separating the mold 7 from the uneven layer 8 while supporting the thin glass 2 flat and curving a part of the mold 7.
- the thin glass 2 is supported flat on the stage 20 via the reinforcing plate 3. Since the thin glass 2 is supported flat, no bending stress is applied to the thin glass 2 and the quality of the optical member 10 is improved.
- the transfer process and the separation process are performed using, for example, a pressing roll 31 that presses the mold 7 against the layer 6 of the molding material, a tension applying roll 32 that applies tension to the mold 7, a fixing jig 33 that fixes the end of the mold 7, and the like. Do.
- the pressing roll 31 is rotatably supported by a pressing roll support member 34, and the pressing roll support member 34 is fixed to the slider 35.
- the slider 35 is slidable in parallel to the support surface that supports the reinforcing plate 3 in the stage 20. When the slider 35 moves, the pressing roll 31 moves relative to the stage 20. While the slider 35 moves, the distance between the pressing roll 31 and the stage 20 is kept constant.
- the tops of the plurality of convex portions of the concavo-convex layer 8 can be arranged on the same plane.
- the tension application roll 32 is rotatably supported by a tension application roll support member 36, and the tension application roll support member 36 is fixed to the stage 20.
- One end of the mold 7 is fixed to the tension applying roll 32.
- a driving source such as a rotary motor rotates and drives the tension applying roll 32 in the direction in which the mold 7 is wound, tension is applied to the mold 7, and a part 7a (see FIG. 3) of the mold 7 is held by the pressing roll 31, and the pressing roll. It curves along the outer periphery of 31.
- the axial direction of the tension applying roll 32 is parallel to the axial direction of the pressing roll 31. Thereby, a uniform tension is applied to the mold 7.
- the fixing jig 33 fixes the other end of the mold 7 to the stage 20.
- a fixing roll may be used instead of the fixing jig 33.
- the fixed roll is rotatably supported by a fixed roll support member, and the fixed roll support member is fixed to the stage 20.
- a brake device or the like brakes the fixed roll and prevents the fixed roll from rotating.
- the intermediate roll 37 is disposed between the pressing roll 31 and the tension applying roll 32 and moves together with the pressing roll 31.
- the intermediate roll 37 is rotatably supported by an intermediate roll support member 38, and the intermediate roll support member 38 is fixed to the slider 35.
- the intermediate roll 37 keeps the length of the curved portion 7a of the mold 7 constant by contacting the mold 7 when the distance between the pressing roll 31 and the tension applying roll 32 changes. Thereby, the contact between the mold 7 and the layer 6 of the molding material and the separation between the mold 7 and the uneven layer 8 are stabilized.
- the intermediate roll 37 is an arbitrary member and may not be provided.
- the fixing jig 33 fixes one end of the mold 7 to the stage 20.
- the tension application roll 32 is rotationally driven in a direction in which a drive source such as a rotary motor winds up the mold 7.
- a drive source such as a rotary motor winds up the mold 7.
- Tension is applied to the mold 7, and a part 7 a of the mold 7 is hugged by the pressing roll 31 and bends along the outer periphery of the pressing roll 31.
- the pressing roll 31 presses the mold 7 against the layer 6 of molding material.
- the pressing roll 31 moves to the right in FIG. 2 with respect to the thin glass plate 2 supported by the stage 20.
- the tension applying roll 32 winds the mold 7 in a spiral while applying tension to the mold 7, the curved portion 7 a of the mold 7 gradually moves, and the mold 7 and the layer 6 of the molding material gradually come into contact with each other.
- the area expands. Therefore, air can be prevented from being caught between the mold 7 and the layer 6 of the molding material, and the transfer accuracy of the concave-convex pattern can be improved.
- the pressing roll 31 keeps the radius of curvature of the curved portion 7a of the mold 7 constant. Therefore, the load applied to the mold 7 is stabilized, and the mold 7 is hardly damaged. In addition, the effect of reducing air entrainment can be stably obtained.
- the pressing roll 31 may move on the mold 7 while rotating around the central axis of the pressing roll 31 as shown in FIG. Since the mold 7 and the pressing roll 31 are not easily rubbed, the mold 7 and the pressing roll 31 are hardly damaged.
- the moving speed of the pressing roll 31 is preferably constant.
- the load applied to the mold 7 is stabilized, and the mold 7 is hardly damaged.
- the effect of reducing air entrainment can be stably obtained.
- the layer 6 of the molding material is solidified to form the uneven layer 8.
- the pressing roll 31 presses the mold 7 against the uneven layer 8.
- the pressing roll 31 moves to the left in FIG. 2 with respect to the thin glass 2 supported by the stage 20.
- the tension applying roll 32 feeds the mold 7 while applying tension to the mold 7, the curved portion 7 a of the mold 7 gradually moves, and the mold 7 and the uneven layer 8 are gradually separated. Therefore, the force required for separation can be reduced, and damage to the mold 7 and the uneven layer 8 can be suppressed.
- the pressing roll 31 keeps the curvature radius of the curved portion 7a of the mold 7 constant. Therefore, the load applied to the mold 7 is stabilized, and the mold 7 is hardly damaged.
- the pressing roll 31 may move on the mold 7 while rotating around the central axis of the pressing roll 31 as shown in FIG. Since the mold 7 and the pressing roll 31 are not easily rubbed, the mold 7 and the pressing roll 31 are hardly damaged.
- the moving speed of the pressing roll 31 is preferably constant.
- the load applied to the mold 7 is stabilized, and the mold 7 is hardly damaged.
- the trace of separation hardly remains on the uneven layer 8. If the separation is performed intermittently, linear marks may be formed on the uneven layer 8.
- the member that presses the mold 7 against the layer 6 (or the concavo-convex layer 8) of the molding material is the pressing roll 31, but may be a member that has a curved surface (preferably an arc surface) in a part of the outer periphery.
- a kamaboko-shaped member may be used.
- the stage 20 side is fixed and the pressing roll 31 side is moved.
- the stage 20 side may be moved and the pressing roll 31 side may be fixed, or both sides may be moved. .
- FIG. 4 is an explanatory view showing a modification of the transfer process and the separation process.
- the transfer step is performed using, for example, a pressing roll 31 that presses the mold 7 against the layer 6 of the molding material, a tension applying roll 32 that applies tension to the mold 7, and a fixing jig 33 that fixes the end of the mold 7.
- the stage 20 is movable along a guide 22 laid on the support base 21.
- the pressing roll 31 is rotatably supported by a pressing roll support member 34, and the pressing roll support member 34 is fixed to the support base 21.
- the tension application roll 32 is rotatably supported by a tension application roll support member 36, and the tension application roll support member 36 is fixed to the support base 21.
- One end of the mold 7 is fixed to the tension applying roll 32.
- a driving source such as a rotary motor rotates and drives the tension applying roll 32 in the direction in which the mold 7 is wound, tension is applied to the mold 7, and a part 7a (see FIG. 3) of the mold 7 is held by the pressing roll 31, and the pressing roll. It curves along the outer periphery of 31.
- the axial direction of the tension applying roll 32 is parallel to the axial direction of the pressing roll 31. Thereby, a uniform tension is applied to the mold 7.
- the fixing jig 33 fixes the other end of the mold 7 to the stage 20.
- a fixing roll may be used.
- the fixed roll is rotatably supported by a fixed roll support member, and the fixed roll support member is fixed to the stage 20.
- a brake device or the like brakes the fixed roll and prevents the fixed roll from rotating.
- the fixing jig 33 fixes one end of the mold 7 to the stage 20.
- the tension application roll 32 is rotationally driven in a direction in which a drive source such as a rotary motor winds up the mold 7.
- a drive source such as a rotary motor winds up the mold 7.
- Tension is applied to the mold 7, and a part 7 a of the mold 7 is hugged by the pressing roll 31 and bends along the outer periphery of the pressing roll 31.
- the pressing roll 31 presses the mold 7 against the layer 6 of molding material.
- the thin glass 2 supported by the stage 20 moves to the left in FIG.
- the tension applying roll 32 feeds the mold 7 while applying tension to the mold 7, the curved portion 7 a of the mold 7 gradually moves, the mold 7 and the layer 6 of the molding material gradually contact, and the contact area increases. Therefore, also in this modification, it is possible to suppress air from being caught between the mold 7 and the layer 6 of the molding material, and the transfer accuracy of the concavo-convex pattern can be improved.
- the layer 6 of the molding material is solidified to become the uneven layer 8.
- the pressing roll 31 presses the mold 7 against the uneven layer 8.
- the thin glass 2 supported by the stage 20 moves to the right in FIG. While the tension applying roll 32 applies tension to the mold 7, the mold 7 is wound in a spiral shape, the curved portion 7 a of the mold 7 gradually moves, and the mold 7 and the uneven layer 8 are gradually separated. Therefore, also in this modification, the force required for separation can be reduced, and the damage to the mold 7 and the uneven layer 8 can be suppressed.
- a part of the sheet-like mold 7 is curved, and the curved part 7a is moved so that the mold 7 and the layer 6 of the molding material are gradually brought into contact with each other.
- the mold 7 and the layer 6 of the molding material may be brought into contact at a stretch while being kept parallel. In this case, it is preferable to perform the transfer process under a reduced pressure atmosphere in order to prevent air from being caught.
- the thin glass plate 2 and the reinforcing plate 3 are peeled off.
- a thin blade is inserted into the interface between the thin glass 2 and the reinforcing plate 3 to form a peeling starting point, and then the thin glass 2 and the reinforcing plate 3 are peeled while curving a part of the reinforcing plate 3.
- the peeling process may be performed after the transfer process, or may be performed in the middle of the optical panel manufacturing process.
- the peeling step is preferably performed after the separation step in order to receive the load applied to the thin glass 2 by the reinforcing plate 3 in the separation step.
- the reinforcing plate 3 is peeled off from the thin glass 2 after the formation of the concavo-convex layer 8 as shown in FIG. 1E and does not become a part of the optical panel, so that the optical panel can be made thinner and lighter. It is.
- FIG. 5 is a diagram showing a modification of the process performed after the separation process of FIG.
- the adhesive layers 11 and 13 are made of, for example, an acrylic resin or an olefin resin.
- the protective films 12 and 14 are made of a general thermoplastic resin, for example, polyethylene terephthalate (PET), polyethylene (PE), or polypropylene (PP).
- the protective film 14 reinforces the thin glass 2 via the adhesive layer 13 in the peeling step (FIG. 5B) for peeling the thin glass 2 and the reinforcing plate 3, the thin glass 2 Can be prevented from being damaged.
- the protective film 14 and the pressure-sensitive adhesive layer 13 are peeled off from the concavo-convex layer 8 during the manufacturing process of the optical panel and do not become part of the optical panel.
- the adhesion layer 13 is unnecessary.
- the optical member 10 is shipped in the state of FIG. 5C, but may be shipped in the state of FIG. 5A (the state in which the thin glass plate 2 is reinforced by the reinforcing plate 3). .
- the peeling process which peels the thin glass 2 and the reinforcement board 3 is performed in the middle of the manufacturing process of an optical panel.
- the adhesive layer 13 may not be provided, and the protective film 14 may be merely in contact with the uneven layer 8 without being bonded.
- the optical member 10 includes a thin glass plate 2 and a concavo-convex layer 8 formed on the thin glass plate 2 as shown in FIG. 1 (e), FIG. 5 (c), and the like.
- the optical member 10 has translucency.
- the thickness of the thin glass 2 is, for example, 0.3 mm or less, more preferably 0.2 mm or less, still more preferably 0.1 mm or less, and particularly preferably 0.05 mm or less.
- board thickness of the thin glass 2 is from the viewpoint of the moldability of the thin glass 2, Preferably it is 0.0001 mm or more, More preferably, it is 0.001 mm or more, More preferably, it is 0.005 mm or more.
- the optical member 10 is, for example, a moth-eye type antireflection member.
- the uneven layer 8 has a structure in which a large number of conical protrusions 8a are projected on a plane.
- the convex portions 8a are periodically arranged in, for example, a hexagonal lattice shape, a quasi-hexagonal lattice shape, a tetragonal lattice shape, or a quasi-tetragonal lattice shape.
- Adjacent convex portions 8a may be in contact with each other or may be separated from each other, and may be arranged such that the skirt portions of the convex portions 8a overlap.
- the pitch P1 of the convex portions 8a is set to be equal to or less than the wavelength of visible light. Light reflectance is reduced over a wide wavelength range.
- FIG. 6 is a cross-sectional view showing a method for manufacturing an optical panel according to the first embodiment of the present invention.
- the optical panel manufacturing method includes a step of preparing the optical member 10 (FIG. 6A), a step of preparing the laminated panel 60 (FIG. 6B), and a step of bonding the optical member 10 and the laminated panel 60 together. (FIG. 6C).
- Protective films 12 and 14 are attached to the optical member 10 through the adhesive layers 11 and 13 in the step shown in FIG.
- the laminated panel 60 includes a color filter substrate 61, a liquid crystal layer 62, and an array substrate 63 as shown in FIG.
- the color filter substrate 61 has a color filter, a transparent electrode, and the like inside.
- the array substrate 63 includes active elements such as TFTs, electrodes that serve as sub-pixels, and the like.
- a polarizing plate and a viewing angle correcting optical film may be bonded to the surface of the array substrate 63 opposite to the liquid crystal layer 62 and the surface of the color filter substrate 61 opposite to the liquid crystal layer 62.
- the protective film 12 protecting the thin glass 2 is peeled off, and the thin glass 2 and the laminated panel 60 are bonded together by the adhesive layer 11.
- the thin glass 2 is affixed to the front surface (surface opposite to the backlight) of the laminated panel 60, for example, affixed to the color filter substrate 61.
- the optical panel 70 is reduced in thickness and weight.
- FIG. 7 is a cross-sectional view illustrating a method of manufacturing an optical member according to the second embodiment of the present invention.
- the optical member of the present embodiment is a wire grid type polarizing member, and is used for manufacturing a liquid crystal panel as an optical panel.
- the process of preparing the laminated plate 1 and the process of forming the layer 6 of the molding material on the thin glass 2 of the laminated plate 1 are the same as in FIG.
- the optical member manufacturing method includes a step of preparing the laminated plate 1 (FIG. 1A), and a step of forming the layer 6 of the molding material on the thin glass 2 of the laminated plate 1 (FIG. 1). 1 (b)), a transfer step in which the mold 107 is pressed against the surface of the layer 6 of the molding material (FIG. 7A), and a separation step in which the uneven layer 108 to which the uneven pattern of the mold 107 has been transferred is separated from the mold 107. (FIG. 7B).
- the concavo-convex layer 108 has a striped structure in which a number of ridges 108a are arranged at intervals on a plane.
- the pitch P2 of the ridge 108a is set to be equal to or less than the wavelength of visible light.
- the thin glass 2 is detachably coupled to the reinforcing plate 3 in the transfer process. Since the thin glass plate 2 is reinforced by the reinforcing plate 3, it is possible to prevent the thin glass plate 2 from being broken by a force pressing the mold 107 against the surface of the layer 6 of the molding material. After the transfer step, the thin glass 2 and the reinforcing plate 3 are peeled off, and the reinforcing plate 3 does not become a part of the optical panel. Therefore, the optical panel can be made thinner and lighter.
- the method for manufacturing an optical member further includes a step (FIG. 7C) of forming a metal wire 109 at the tip of each convex strip 108 a.
- the metal wire 109 is formed, for example, by vapor-depositing a metal material from obliquely above the ridge 108a.
- the metal material include aluminum, silver, chromium, magnesium, an aluminum alloy, and a silver alloy.
- a physical vapor deposition method such as a vacuum vapor deposition method, a sputtering method, or an ion plating method is used.
- the plurality of metal lines 109 reflect polarized light having an electric field vector oscillating in a direction parallel to the metal line 109, and transmit polarized light having an electric field vector oscillating in a direction orthogonal to the metal line 109. Thereby, linearly polarized light is obtained.
- the method for producing an optical member may further include a peeling step (FIG. 7D) for peeling the thin glass 2 and the reinforcing plate 3.
- the peeling process may be performed after the transfer process and may be performed in the middle of the manufacturing process of the optical panel.
- the peeling step is preferably performed after the separation step in order to receive the load applied to the thin glass 2 by the reinforcing plate 3 in the separation step. Further, the peeling step is more preferably performed after the step of forming the metal wire 109.
- the thin glass 2 can be kept flat when the metal wire 109 is formed, and the metal wire 109 can be formed with high accuracy.
- the optical member 110 has a thin glass plate 2 and an uneven layer 108 formed on the thin glass plate 2.
- a metal wire 109 is formed at the tip of each ridge 108a.
- the thickness of the thin glass 2 is, for example, 0.3 mm or less, more preferably 0.2 mm or less, still more preferably 0.1 mm or less, and particularly preferably 0.05 mm or less.
- board thickness of the thin glass 2 is from the viewpoint of the moldability of the thin glass 2, Preferably it is 0.0001 mm or more, More preferably, it is 0.001 mm or more, More preferably, it is 0.005 mm or more.
- the optical member 110 is a wire grid type polarizing member.
- the concavo-convex layer 108 has a striped structure in which a large number of ridges 108a are arranged at intervals on a plane.
- the pitch P2 of the ridge 108a is set to be equal to or less than the wavelength of visible light.
- FIG. 8 is a cross-sectional view illustrating a method of manufacturing an optical panel according to the second embodiment of the present invention.
- the manufacturing method of the optical panel includes a step of preparing the optical member 110 (FIG. 8A), a step of preparing the laminated panel 60 (FIG. 8B), and a step of bonding the optical member 110 and the laminated panel 60 together. (FIG. 8C).
- the thin glass 2 is protected by a protective film 12 through an adhesive layer 11.
- the metal wire 109 is protected by the protective film 14 via the adhesive layer 13.
- the adhesive layer 13 may not be provided on the metal wire 109, and the protective film 14 may be simply in contact with the metal wire 109 without being bonded.
- the protective film 12 protecting the thin glass 2 is peeled off, and the thin glass 2 and the laminated panel 60 are bonded together by the adhesive layer 11.
- the thin glass 2 may be affixed to either the front surface of the laminated panel 60 or the back surface of the laminated panel 60, and another thin glass 2 may be affixed to both the front surface and the back surface.
- the optical panel 170 is reduced in thickness and weight.
- FIG. 9 is a cross-sectional view illustrating a method of manufacturing an optical member according to the second embodiment of the present invention.
- the optical member of this embodiment is a lenticular lens member, and is used for manufacturing a liquid crystal panel as an optical panel.
- the process of preparing the laminated plate 1 and the process of forming the layer 6 of the molding material on the thin glass 2 of the laminated plate 1 are the same as in FIG.
- the optical member manufacturing method includes a step of preparing the laminated plate 1 (FIG. 1A), and a step of forming the layer 6 of the molding material on the thin glass 2 of the laminated plate 1 (FIG. 1). 1 (b)), a transfer step of pressing the mold 207 against the surface of the layer 6 of the molding material (FIG. 9A), and a separation step of separating the uneven layer 208 and the mold 207 (FIG. 9B).
- the concavo-convex layer 208 has a structure in which a large number of convex cylindrical lenses 208a are arranged on a plane without a gap.
- the thin glass 2 is detachably coupled to the reinforcing plate 3 in the transfer process. Since the thin glass plate 2 is reinforced by the reinforcing plate 3, it is possible to prevent the thin glass plate 2 from being broken by a force pressing the mold 207 against the surface of the layer 6 of the molding material. After the transfer step, the thin glass 2 and the reinforcing plate 3 are peeled off, and the reinforcing plate 3 does not become a part of the optical panel. Therefore, the optical panel can be made thinner and lighter.
- the method for producing an optical member may further include a peeling step (FIG. 9C) for peeling the thin glass 2 and the reinforcing plate 3.
- the peeling process may be performed after the transfer process and may be performed in the middle of the manufacturing process of the optical panel.
- the peeling step is preferably performed after the separation step in order to receive the load applied to the thin glass 2 by the reinforcing plate 3 in the separation step.
- the optical member 210 includes a thin glass plate 2 and a concavo-convex layer 208 formed on the thin glass plate 2.
- the optical member 210 has translucency.
- the thickness of the thin glass 2 is, for example, 0.3 mm or less, more preferably 0.2 mm or less, still more preferably 0.1 mm or less, and particularly preferably 0.05 mm or less.
- board thickness of the thin glass 2 is from the viewpoint of the moldability of the thin glass 2, Preferably it is 0.0001 mm or more, More preferably, it is 0.001 mm or more, More preferably, it is 0.005 mm or more.
- the optical member 210 is, for example, a lenticular lens member.
- the concavo-convex layer 208 has a structure in which a large number of convex cylindrical lenses 208a are arranged without a gap on a plane.
- Each convex cylindrical lens 208a condenses the light of the image for the left eye to the left eye of the user, and condenses the light of the image for the right eye to the right eye of the user.
- the pitch of the convex cylindrical lens 208a is several tens of ⁇ m to several hundreds of ⁇ m, and preferably several tens of nm to several hundreds of nm.
- FIG. 10 is a cross-sectional view illustrating a method of manufacturing an optical panel according to the third embodiment of the present invention.
- the optical panel manufacturing method includes a step of preparing the optical member 210 (FIG. 10A), a step of preparing the laminated panel 60 (FIG. 10B), and a step of bonding the optical member 210 and the laminated panel 60 together. (FIG. 10C).
- the thin glass 2 is protected by a protective film 12 through an adhesive layer 11.
- the uneven layer 208 is protected by the protective film 14 via the adhesive layer 13.
- the adhesive layer 13 may not be provided on the uneven layer 208, and the protective film 14 may be simply in contact with the uneven layer 208 without being bonded.
- the protective film 12 protecting the thin glass 2 is peeled off, and the thin glass 2 and the laminated panel 60 are bonded together by the adhesive layer 11.
- the thin glass 2 is attached to the front surface of the laminated panel 60.
- the optical panel 270 is reduced in thickness and weight.
- the base material of the optical member 210 is glass, the change in lens pitch due to the operating heat of the optical panel is small and the image quality is better than when the base material is made of a resin having a larger linear expansion coefficient than glass.
- each convex cylindrical lens 208a may play the role of making the light from the light source parallel light.
- the micro lenses may be arranged in two dimensions.
- FIG. 11 is a cross-sectional view illustrating a method of manufacturing an optical member according to the fourth embodiment of the present invention.
- the optical member of the present embodiment is a wire grid type polarizing member, and is used for manufacturing a liquid crystal panel as an optical panel.
- the liquid crystal panel of the present embodiment is an in-cell type in which the color filter substrate or the array substrate includes a metal wire.
- the optical member manufacturing method includes a step of preparing the laminated plate 1 (FIG. 1A), and a step of forming a layer 6 of the molding material on the thin glass 2 of the laminated plate 1 (FIG. 1 (b)), a transfer step of pressing the mold 307 against the surface of the layer 6 of the molding material (FIG. 11A), and a separation step of separating the uneven layer 308 and the mold 307 (FIG. 11B).
- the concavo-convex layer 308 has a striped structure in which a large number of ridges 308a are arranged at intervals on a plane.
- the pitch P4 of the ridges 308a is set to be equal to or less than the wavelength of visible light.
- the thin glass 2 is detachably coupled to the reinforcing plate 3 in the transfer process. Since the thin glass plate 2 is reinforced by the reinforcing plate 3, it is possible to prevent the thin glass plate 2 from being broken by a force pressing the mold 307 against the surface of the molding material layer 6. After the transfer step, the thin glass 2 and the reinforcing plate 3 are peeled off, and the reinforcing plate 3 does not become a part of the optical panel. Therefore, the optical panel can be made thinner and lighter.
- the method for manufacturing an optical member further includes a step (FIG. 11C) of forming a metal wire 309 at the tip portion of each ridge portion 308a.
- the metal wire 309 is formed, for example, by vapor-depositing a metal material obliquely from above the ridge portion 308a.
- the plurality of metal lines 309 reflect polarized light having an electric field vector that vibrates in a direction parallel to the metal line 309 and transmit polarized light having an electric field vector that vibrates in a direction orthogonal to the metal line 309. Thereby, linearly polarized light is obtained.
- the optical member manufacturing method may not include a peeling step (FIG. 7D) for peeling the thin glass 2 and the reinforcing plate 3.
- the peeling process may be performed during the optical panel manufacturing process.
- the optical member 310 has a thin glass plate 2 and an uneven layer 308 formed on the thin glass plate 2.
- a metal wire 309 is formed at the tip of each protruding line portion 308a.
- the optical member 310 includes the reinforcing plate 3.
- the thickness of the thin glass 2 is, for example, 0.3 mm or less, more preferably 0.2 mm or less, still more preferably 0.1 mm or less, and particularly preferably 0.05 mm or less.
- board thickness of the thin glass 2 is from the viewpoint of the moldability of the thin glass 2, Preferably it is 0.0001 mm or more, More preferably, it is 0.001 mm or more, More preferably, it is 0.005 mm or more.
- the optical member 310 is a wire grid type polarizing member.
- the uneven layer 308 has a striped structure in which a large number of protrusions 308a are arranged at intervals on a plane.
- the pitch P4 of the ridges 308a is set to be equal to or less than the wavelength of visible light.
- FIG. 12 is a cross-sectional view illustrating a method of manufacturing an optical panel according to the fourth embodiment of the present invention.
- the optical panel manufacturing method includes a step of preparing the optical member 310 (FIG. 12A), a step of sealing the liquid crystal layer 330 between the thin glass 2 and the counter substrate 320 (FIG. 12B), and a thin plate.
- the peeling process (FIG.12 (c)) which peels the glass 2 and the reinforcement board 3 is provided.
- the thin glass 2 of the optical member 310 is supported by the reinforcing plate 3, and the optical member 310 includes the reinforcing plate 3.
- the metal wire 309 is protected by the protective film 14 via the adhesive layer 13.
- the adhesive layer 13 may not be provided, and the protective film 14 may be simply in contact with the metal wire 309 without being bonded.
- the thin glass plate 2 of the optical member 310 for example, a color filter, a transparent electrode, and the like are formed after the protective film 14 and the like are peeled off. At this time, since the thin glass 2 is held flat by the reinforcing plate 3, a color filter or the like can be formed with high accuracy.
- a thin color glass 2 and a color filter constitute a color filter substrate.
- the counter substrate 320 is an array substrate and includes active elements (TFTs) and electrodes therein.
- an active element for example, TFT
- an electrode for example, an electrode, or the like as an optical panel member
- An array substrate is constituted by the thin glass 2 and active elements.
- the counter substrate 320 includes a color filter, a transparent electrode, and the like inside.
- a liquid crystal layer 330 is sealed between the color filter substrate (or array substrate) including the thin glass plate 2 and the counter substrate 320. Thereafter, the thin glass 2 and the reinforcing plate 3 are peeled off, and the reinforcing plate 3 does not become a part of the optical panel 370.
- the optical panel 370 can be made thinner and lighter.
- the manufacturing method of the optical member, the optical member, and the manufacturing method of the optical panel have been described in the first to fourth embodiments and the modifications thereof, the present invention is not limited to the above-described embodiments. Various modifications and changes are possible within the scope of the gist of the present invention described in the claims.
- the optical panel of the above embodiment is a liquid crystal panel, but may be an organic EL panel.
- the optical panel of the said embodiment is an image display panel which displays an image, the illumination panel which does not display an image may be sufficient.
- the separation step is performed after the molding material is solidified in the transfer step.
- the molding material may be solidified after the separation step.
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Abstract
Description
薄板ガラスを備える光学部材の製造方法であって、
前記薄板ガラスとモールドとの間に成形材料の層を挟み、前記モールドの凹凸パターンが転写した凹凸層を前記薄板ガラス上に形成する転写工程と、
前記凹凸層と前記モールドとを分離する分離工程とを有し、
前記転写工程で、前記薄板ガラスは補強板と剥離可能に結合されている。
薄板ガラスと、該薄板ガラス上に設けられる凹凸層とを有し、
前記薄板ガラスの板厚が0.1mm以下である。
上記の光学部材と、上記の凹凸層を保護する保護フィルムとを有する。
上記光学部材の製造方法により得られた光学部材を用いて光学パネルを製造する。
図1は、本発明の第1実施形態による光学部材の製造方法を示す断面図である。本実施形態の光学部材は、モスアイ型の反射防止部材であって、光学パネルとしての液晶パネルの製造に用いられる。
積層板1は、例えば図1(a)に示すように薄板ガラス2と、薄板ガラス2を補強する補強板3とを含む。
成形材料の層6は、薄板ガラス2上に形成するが、モールド7上に形成してもよい。いずれの場合でも、転写工程では、薄板ガラス2とモールド7との間に成形材料の層6が挟まれる。
転写工程では、インプリント法で凹凸層8を形成する。転写工程は、薄板ガラス2とモールド7との間に成形材料の層6を挟み、モールド7の凹凸パターンが転写した凹凸層8を形成する。凹凸層8の凹凸パターンは、モールド7の凹凸パターンが略反転したパターンである。
剥離工程では、薄板ガラス2と補強板3とを剥離する。例えば、剥離工程では、薄板ガラス2と補強板3との界面に薄刃を差し込み、剥離起点を形成した後、補強板3の一部を湾曲させながら薄板ガラス2と補強板3とを剥離する。
図5は、図1(d)の分離工程後に行われる工程の変形例を示す図である。
光学部材10は、図1(e)、図5(c)等に示すように、薄板ガラス2、及び薄板ガラス2上に形成される凹凸層8を有する。光学部材10は、透光性を有する。
図6は、本発明の第1実施形態による光学パネルの製造方法を示す断面図である。光学パネルの製造方法は、光学部材10を用意する工程(図6(a))、積層パネル60を用意する工程(図6(b))、並びに光学部材10と積層パネル60とを貼り合わせる工程(図6(c))を備える。
図7は、本発明の第2実施形態による光学部材の製造方法を示す断面図である。本実施形態の光学部材は、ワイヤグリッド型の偏光部材であって、光学パネルとしての液晶パネルの製造に用いられる。尚、積層板1を用意する工程、積層板1の薄板ガラス2上に成形材料の層6を形成する工程は、図1と同様であるので図示を省略する。
光学部材110は、図7(d)に示すように、薄板ガラス2、及び薄板ガラス2上に形成される凹凸層108を有する。各凸条部108aの先端部には、金属線109が形成されている。
図8は、本発明の第2実施形態による光学パネルの製造方法を示す断面図である。光学パネルの製造方法は、光学部材110を用意する工程(図8(a))、積層パネル60を用意する工程(図8(b))、並びに光学部材110と積層パネル60とを貼り合わせる工程(図8(c))を備える。
図9は、本発明の第2実施形態による光学部材の製造方法を示す断面図である。本実施形態の光学部材は、レンチキュラーレンズ部材であって、光学パネルとしての液晶パネルの製造に用いられる。尚、積層板1を用意する工程、積層板1の薄板ガラス2上に成形材料の層6を形成する工程は、図1と同様であるので図示を省略する。
光学部材210は、図9(c)に示すように、薄板ガラス2、及び薄板ガラス2上に形成される凹凸層208を有する。光学部材210は、透光性を有する。
図10は、本発明の第3実施形態による光学パネルの製造方法を示す断面図である。光学パネルの製造方法は、光学部材210を用意する工程(図10(a))、積層パネル60を用意する工程(図10(b))、及び光学部材210と積層パネル60とを貼り合わせる工程(図10(c))を備える。
図11は、本発明の第4実施形態による光学部材の製造方法を示す断面図である。本実施形態の光学部材は、ワイヤグリッド型の偏光部材であって、光学パネルとしての液晶パネルの製造に用いられる。本実施形態の液晶パネルは、第2実施形態の液晶パネルと異なり、カラーフィルター基板又はアレイ基板が金属線を含むインセル方式である。
光学部材310は、図11(c)に示すように、薄板ガラス2、及び薄板ガラス2上に形成される凹凸層308を有する。各凸条部308aの先端部には、金属線309が形成されている。光学部材310は、補強板3を含む。
図12は、本発明の第4実施形態による光学パネルの製造方法を示す断面図である。光学パネルの製造方法は、光学部材310を用意する工程(図12(a))、薄板ガラス2と対向基板320との間に液晶層330を封入する工程(図12(b))、及び薄板ガラス2と補強板3とを剥離する剥離工程(図12(c))を備える。
2 薄板ガラス
3 補強板
4 支持板
5 剥離層
6 成形材料の層
7 モールド
8 凹凸層
31 押し付けロール
60 積層パネル
61 カラーフィルター基板
62 液晶層
63 アレイ基板
70 光学パネル
Claims (14)
- 薄板ガラスを備える光学部材の製造方法であって、
前記薄板ガラスとモールドとの間に成形材料の層を挟み、前記モールドの凹凸パターンが転写した凹凸層を前記薄板ガラス上に形成する転写工程と、
前記凹凸層と前記モールドとを分離する分離工程とを有し、
前記転写工程で、前記薄板ガラスは補強板と剥離可能に結合されている、光学部材の製造方法。 - 前記モールドはフレキシブル性を有し、
前記転写工程は、前記薄板ガラスを平坦に支持すると共に前記モールドの一部を湾曲させながら前記モールドを前記成形材料の層に徐々に押し付ける工程を含む請求項1に記載の光学部材の製造方法。 - 前記転写工程における前記モールドの湾曲部分は、前記モールドを前記成形材料の層に押し付ける部材に沿って湾曲され、
該押し付ける部材と、前記薄板ガラスとが相対的に移動することにより、該押し付ける部材が前記モールドを前記成形材料の層に徐々に押し付ける請求項2に記載の光学部材の製造方法。 - 前記モールドに張力を印加することで、前記モールドの一部を前記押し付ける部材に抱き付かせ、前記押し付ける部材に沿って湾曲させる請求項3に記載の光学部材の製造方法。
- 前記モールドはフレキシブル性を有し、
前記分離工程は、前記薄板ガラスを平坦に支持すると共に前記モールドの一部を湾曲させながら前記モールドを前記凹凸層から徐々に分離する工程を含む請求項1に記載の光学部材の製造方法。 - 前記分離工程における前記モールドの湾曲部分は、前記モールドを前記凹凸層に押し付ける部材に沿って湾曲され、
該押し付ける部材と、前記薄板ガラスとが相対的に移動することにより、前記モールドが前記凹凸層から徐々に分離する請求項5に記載の光学部材の製造方法。 - 前記モールドに張力を印加することで、前記モールドの一部を前記押し付ける部材に抱き付かせ、前記押し付ける部材に沿って湾曲させる請求項6に記載の光学部材の製造方法。
- 前記薄板ガラスと前記補強板とを剥離する剥離工程をさらに備える請求項1~7のいずれか一項に記載の光学部材の製造方法。
- 前記補強板は支持板及び該支持板上に形成される剥離層を備え、該剥離層と前記薄板ガラスとが剥離可能に結合される請求項1~8のいずれか一項に記載の光学部材の製造方法。
- 前記薄板ガラスの板厚が0.3mm以下である請求項1~9のいずれか一項に記載の光学部材の製造方法。
- 薄板ガラスと、該薄板ガラス上に設けられる凹凸層とを有し、
前記薄板ガラスの板厚が0.1mm以下である光学部材。 - 請求項11の光学部材と、前記凹凸層を保護する保護フィルムとを有する保護フィルム付き光学部材。
- 請求項1~10のいずれか一項に記載の光学部材の製造方法により得られた光学部材を用いて光学パネルを製造する光学パネルの製造方法。
- 前記光学パネルは、液晶パネル又は有機ELパネルである請求項13に記載の光学パネルの製造方法。
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