TW201341184A - Manufacturing method and manufacturing device for optical-use laminate structure - Google Patents

Abstract

The objective of the present invention is to provide a method and device for manufacturing an optical-use laminate structure which, despite originating with an OCR application method, resolves problems of the OCR application method, and in addition, has merits exceeding OCA affixation. In a first step (P1), a radical polymerization type active energy ray curable optically transparent resin solution (R) is applied upon a substrate (1) in order to form a monolamellar fluid uncured layer (L1) upon the substrate (1). In a second step (P2), by irradiating the active energy rays onto the uncured layer (L1) in order to cause curing to proceed, the uncured layer (L1) is changed to a thickened layer (L2) in which fluidity is reduced. In a thid step (P3), the thickened state of the thickened layer (L2) is maintained.

Description

Manufacturing method and manufacturing device for laminated structure for optics

The present invention relates to the OCR coating method, which is based on the conventional OCR coating method, which is based on the OCR coating method (the method of applying the liquid optical transparent resin coating on the substrate). A method and apparatus for producing an optical laminated structure having the advantages of a method of applying a sheet-like optically transparent adhesive to a substrate.

[Optical Transparent Resin (OCR) and Optically Clear Adhesive (OCA)]

(the meaning of the word)

-1-

In various electronic devices including the input device and the display device, the term "OCR" or "OCA" is often used in the related art field of the optical laminated structure.

-2-

OCR is an abbreviation for Optical Clear Resin, which is used in the state of the resin liquid.

-3-

The OCA-based optical transparent adhesive (Optical Clear Adhesive) is used in the form of an adhesive sheet-like (band-like when narrow) adhesive. Because OCA has adhesiveness, the "separator/OCA/separator" laminate in which both sides of the OCA are covered by a separator (with a release sheet), or the separator is a double sheet having a double-sided release sheet. The surface peeling separator/OCA" winding form is obtained or prepared.

(Representative use of OCR and OCA)

-1-

The optical multilayer structure using the former OCR is mostly used between one of the substrates and the other substrate (for example, "between the cover glass and the sensing glass", "between the cover glass and the liquid crystal module"). There is a curable resin liquid for OCR.

The intercalation of the curable resin liquid between the two substrates is usually carried out by coating a resin liquid on one of the substrates with a dispenser or the like, and then coating the other layer on the coating layer. In some cases, the resin liquid may be injected into the gap while the two substrates are in close proximity.

The curing of the curable resin liquid between the substrates is facilitated by heating when the resin liquid is a thermosetting type, and is preferably irradiated with ultraviolet rays when the resin liquid is an ultraviolet curing type.

-2-

On the other hand, in the case of using the laminated structure for optics of the latter OCA, as described above, in the case where the OCA double-sided layer is covered or prepared by the separator, first one of the separators is peeled off. The OCA exposed on one side is adhered to one surface of one of the substrates, and then the remaining separator coated on the OCA is peeled off and removed, and the OCA exposed on the peeling surface is adhered to the other substrate. Instructions.

(OCR coating method and OCA adhesion method) (1) The problem of OCR coating method

When the OCR belonging to the resin liquid is interposed between the two substrates by the above method, as shown in the schematic view of Fig. 4, occurrence of various obstacles should be prevented. The left diagram of Fig. 4 is a view immediately after the OCR belonging to the resin liquid is applied onto the substrate (1). However, as shown in the upper right diagram of Fig. 4, the peripheral edge portion of the applied coating layer tends to sag over time. Again, as shown in the bottom right of Figure 4. It is shown that when the substrate (1) coated by the OCR is subjected to a moving operation or a vertical up-and-down operation for laminating with another substrate (2) not shown, there is a possibility of gravity or centrifugal force. There is a tendency for the thickness of the coating layer to be biased. Further, the OCR interposed between the substrate (1) and the substrate (2) may also cause an obstacle such as bleeding out from the peripheral edge portion of the structure.

(Second) The problem of OCA sticking method

-1-

On the other hand, when the latter OCA is attached to one of the substrates, and the design of the other substrate (known as the "decoration portion" on the periphery thereof), most of the design is to design a black or white printing gradient portion. In the step of bonding, the resin droplets and the bias in the OCR coating method do not occur, but a gap is likely to occur between the printing gradient portion and the OCA bonding portion around the other substrate. . (Note: Since the white decorative portion is lighter than the black decorative portion, the light is more easily penetrated, so the thickness is increased by overlapping the white layer or the black undercoat layer is applied before the white top coating is applied thereon. It is formed by layers. Therefore, the white decorative part is thicker than the black decorative part, and the thickness is thickened.)

Although OCA is compressed and deformed, it is a sheet-like adhesive which is not fluid in the original state, and as described in detail below, it is also difficult to adhere to a predetermined region of the substrate in a manner that does not occur in a gap. This phenomenon will be described using FIG. 5.

-2-

Fig. 5(A) is an explanatory view showing an arrangement relationship of a substrate (1) to which a sheet-like OCA is adhered and bonded to a substrate (2) in which a seal (2E) is formed by printing.

-3-

As shown in Fig. 5(B), the bonding of the OCA on the substrate (1) to the position inside the gradient of the edge (2E) of the substrate (2) is not easy to see at a glance. . The reason is that the edge banding (2E) has four sides, and there are also four places in the corner of the edge banding (2E), which is extremely difficult to The OCA is interposed without gaps.

Further, if there is a residual gap in the inner side or the corner portion of the edge seal (2E), as shown in Fig. 5(C), the plan view (perspective view) and the edge seal (2E) when viewed from the side of the substrate (2) The gradient between the two is visually observed as the banded bubble (b), and the "substrate (2) / OCA / substrate (1)" laminated structure in such a state may cause loss of commercial value.

-4-

Here, as shown in FIG. 5(D), the OCA peripheral portion on the substrate (1) reaches the intermediate portion of the edge (2E) of the substrate (2) by bonding, and the gap can be surely prevented from occurring. At this time, the peripheral portion of the OCA that has reached the middle of the edge seal (2E) is crushed and collapsed, and thus the OCA at the crushed portion is thinned under the other portions. Under the premise that the film portion is located between the inner side and the outer side of the edge seal (2E), there is no obstacle of OCA deficiency (insufficient filling) and oozing (overfilling), and the error during the bonding can be absorbed. . Therefore, if an OCA pasting operation with high precision is performed, there will be no defective products.

However, this is also the case where the OCA is not easily buried in the gap indicated by the arrow in Fig. 5(D). The reason is that OCA was originally not liquid. Therefore, when the place is viewed from the outside, as shown in Fig. 5(C), the banded bubble (b) is visually observed along the inner side of the gradient.

(Measures and limits of OCR coating method and OCA bonding method)

-1-

First, according to the former OCR coating method, it is known that even if a certain number of sacrificial smooth coating properties and leveling properties (both are related properties of fluidity), dripping and biasing are less likely to occur by increasing the viscosity of the coating liquid as much as possible. .

However, according to the OCR coating method, it is extremely difficult to ensure the fluidity and the leveling property while eliminating dripping and bias. The reason is that it has "liquidity, leveling property", and has "drug prevention, bias prevention", which is originally the opposite.

-2-

On the other hand, according to the latter OCA bonding method, since there is a limitation of the principle of OCA without fluidity, it is necessary to pay attention to the fact that the OCA is adhered as accurately as possible to the area determined by the substrate, and the pressure in the pasting step is taken care of. And temperature control to prevent the occurrence of the above-mentioned banded bubbles (b) due to softening of OCA.

As a result, the thickness of the OCA on the substrate (1) is, for example, about 200 μm, and the thickness of the edge (2E) (i.e., gradient) provided on the substrate (2) by printing is, for example, about 6 to 10 μm, by paying attention to the above. Things can be dealt with.

However, as described above, in the white "decorative portion", the thickness (i.e., the gradient) of the edge seal (2E) is, for example, a casing of 50 to 60 μm, and has reached the limit even if it is impossible to cope with the above matters.

[Patent Literature]

Next, a review is made on patent documents that are considered to be associated with the present invention.

Patent Document 1 listed below discloses a document relating to vacuum bonding between substrates and use of an ultraviolet curable adhesive.

Further, Patent Document 2 listed below discloses a display device in which a substrate and a display panel are laminated by a UV-curable resin layer, and a preliminary display of the ultraviolet curing resin is also described.

Therefore, the above Patent Documents 1 and 2 can be considered as a conventional technique to which the present invention should be compared.

(Patent Document 1)

-1-

Japanese Patent Laid-Open Publication No. 2001-250289 (Patent Document 1), the entire disclosure of which is incorporated herein by reference.

A method of vacuum bonding a substrate, wherein the two substrates are bonded to each other via an adhesive, comprising: ‧ a step of applying a cationic ultraviolet curable adhesive to a ring shape on at least one of the two substrates; and ???expanding the above-mentioned annular coated adhesive to substantially the entire substrate; An ultraviolet irradiation step of irradiating the above-mentioned adhesive with ultraviolet rays to cause the adhesive to start a curing reaction; and a step of bonding the two substrates to each other via an adhesive which starts the curing reaction in a vacuum environment.

Further, the vacuum bonding apparatus for a substrate disclosed in claim 4 is composed of an adhesive application device, an adhesive diffusion device, an ultraviolet irradiation device, and a vacuum environment forming device.

-2-

In the second and eighth aspects of the patent application of the patent document 1, the above-mentioned adhesive is a "cation-based ultraviolet curing type which is a transparent color system which does not significantly impede the penetration of laser light of a DVD having a wavelength of 635 nm or 650 nm. Agent."

-3-

The following items are described in the following paragraphs of Patent Document 1.

Paragraph 0017 describes "a cationic color ultraviolet curable adhesive of a transparent color system having a low viscosity (3500 cps or less) and a high curing rate" (paragraph 0017).

Paragraph 0020 describes "a cationic ultraviolet curing type adhesive which uses a transparent color system and has a low viscosity (3500 cps or less) and a high curing rate (for example, within 5 minutes).

Paragraph 0020 and Figure 1 disclose the use of a dispenser in one of the adhesive applicator devices.

Paragraph 0030 discloses that "an example of the present embodiment is that since the curing time is about 5 minutes, it is adhered to the target within 1 to 2 minutes after being irradiated with ultraviolet rays."

Paragraph 0037 discloses that "the cationic binder is based on ultraviolet radiation. It will only be completely hardened after a certain period of time, so it can be hardened outside the vacuum environment."

Paragraph 0039 discloses a cationic ultraviolet curable adhesive which is a transparent color system which is transparent or translucent and does not significantly hinder the penetration of laser light of a DVD having a wavelength of 635 nm or 650 nm. The substrates which do not pass the ultraviolet rays are bonded to each other, and can be applied to the substrate bonded by ultraviolet rays, and can be widely used in the existing optical disk bonding.

(Patent Document 2)

1

The first application of the Japanese Patent Laid-Open Publication No. 2011-145534 (Patent Document 2) discloses the following manufacturing method.

‧ A method of manufacturing a display device with a front window, wherein the substrate and the display panel are followed by a UV-curable resin, and a method for manufacturing a display device having a front window, wherein ‧ an ultraviolet ray is formed between the display panel and the substrate Hardening resin; ‧ irradiating ultraviolet rays from the substrate side, and partially pre-hardening the ultraviolet curable resin (that is, only preliminary curing of the portion corresponding to the penetration pattern of the ultraviolet ray mask), after being placed for a predetermined period of time; The substrate and the display panel are bonded to each other by irradiating ultraviolet rays from the substrate side to form the ultraviolet curable resin.

(Further, Patent Application No. 10 discloses a display device having a front window, and Patent Application No. 14 discloses a bonding device having a display device with a front window.)

-2-

Here, the "partially hardening" is as described above in the "partially hardening of the ultraviolet curable resin partially from the substrate side." "Only the partial area where the ultraviolet curable resin is irradiated through the ultraviolet irradiation mask is applied, and the ultraviolet curable resin in the mask portion is not hardened and maintains fluidity" (see paragraph 0012).

-3-

In the embodiment of Patent Document 2, the ultraviolet curable resin is discharged linearly from the dispenser to the back side of the front window, and the position is changed to reciprocate, thereby applying (paragraph 0021). The display area is, for example, a diagonal of 3 吋 (the diagonal length is 3 吋) (paragraph 0022). The initial viscosity of the ultraviolet curable resin is, for example, 2300 mPa ‧ sec (paragraph 0024).

-4-

FIG. 7 is a view in which the "liquid crystal panel" is bonded to "the front window that has been coated with the optical resin is reversed", and then the first ultraviolet irradiation is performed to be initially fixed, and after being placed, The second ultraviolet irradiation is performed to achieve hardening. During the initial hardening, the UV-hardening resin that has not been initially hardened will flow to an optimum thickness, and the bubbles will also diffuse to the outside (paragraph 0035).

-5-

An example of the ultraviolet ray-transmissive pattern formed on the ultraviolet ray illuminating mask is nine circles (paragraphs 0032 and 11). Therefore, the ultraviolet-curable resin is initially hardened in a cylindrical shape corresponding to the nine round portions (paragraph 0032).

Another example of the ultraviolet light transmission pattern is a cross and a line (paragraph 0033, Fig. 12), a combination of a line and a circle (paragraph 0033, Fig. 13).

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-250289

[Patent Document 2] Japanese Patent Laid-Open Publication No. 2011-145534

(for patent document 1)

-1-

The invention of Patent Document 1 can be understood as the most characteristic technical idea of the work of applying a cationic ultraviolet curable adhesive to at least one of the substrates when the substrates are bonded to each other. The reason is that the cation-based ultraviolet curable adhesive has a property that the curing reaction starts when the ultraviolet ray is irradiated, and the curing reaction continues until the ultraviolet ray irradiation is stopped until it is substantially hardened.

Further, the invention of Patent Document 1 is directed to paragraphs 0006 to 0008 and paragraph 0039, and a recording substrate having a reflective film such as aluminum or gold is bonded to each other, that is, a recording substrate which does not pass ultraviolet rays. (usually applied to the fit of a disc).

(Further, the invention of Patent Document 1 is directed to a method of coating an ultraviolet curable adhesive, as shown in the paragraph 0020 and its Fig. 1, only the method of applying a ring coating by a dispenser is mentioned.)

-2-

However, the object of the invention (targeting matter), technical idea, specific means, and effects of Patent Document 1 are basically different from the present invention.

(for patent document 2)

-1-

According to the invention of Patent Document 2, after the ultraviolet curable resin is formed between the display panel and the substrate, the ultraviolet light is partially irradiated from the substrate side via the mask, and the portion of the ultraviolet curable resin is initially hardened (the preliminary hardening is only performed). After the predetermined period of time has elapsed, the ultraviolet curable resin is completely cured by irradiating ultraviolet rays from the substrate side, and the substrate and the display panel are subsequently adhered.

-2-

According to the invention of Patent Document 2, the preliminary hardening and the main hardening performed from the substrate side by ultraviolet irradiation are performed in a state in which the "substrate/ultraviolet cured resin layer/display panel" is laminated, and thus it is basically different. this invention. Further, the preliminary hardening in the invention of Patent Document 2 does not mean that the entire ultraviolet curable resin layer is "semi-hardened", but only the pattern portion is hardened (for example, if the penetration pattern of the photomask is rounded, and because of the resin layer The preliminary hardening is oriented in the thickness direction of the resin layer, and thus the preliminary hardened portion is in the form of a cylinder), and in this regard is also substantially different from the present invention.

The technical idea and specific means of the invention of Patent Document 2 are basically different from the present invention.

(invention purpose)

An object of the present invention is to provide a method for eliminating the problem of the OCR coating method by using an OCR coating method (a method of applying a liquid optical transparent resin to a substrate), and having an OCA pasting method ( A method for producing an optical laminated structure having an advantage of a method of applying a sheet-like or strip-shaped optically transparent adhesive to a substrate (and an apparatus for manufacturing such an optical laminated structure).

In other words, both the OCR coating method and the OSA bonding method of the prior art have advantages, but with the technical method of the weak point surface, the present invention aims to provide a technique for eliminating the weak points of the conventional techniques.

In the method for producing an optical layered structure according to the present invention, the substrate (1) is coated with a radical polymerizable active energy ray-curable optically transparent resin liquid (R) to obtain the substrate (1). a first step (P1) of forming a layered body of the "unhardened layer (L1) / substrate (1)" layer having a single layer of the resin liquid (R) and having a fluid uncured layer (L1); The uncured layer (L1) of the laminate obtained by the above first step (P1) is irradiated with active energy The second layer of the thickened layer (L2)/substrate (1) layer of the adhesion-promoting layer (L2) in which the uncured layer (L1) is changed to reduce the fluidity is obtained by curing the second layer. Step (P2); and the third step (P3) of the adhesion-promoting layer (L2) of the layer of the adhesion-promoting layer (L2)/substrate (1) after the second step (P2) is formed ).

In the apparatus for producing an optical layered structure of the present invention, the substrate (1) is obtained by applying a radical polymerization type active energy ray-curable optically transparent resin liquid (R) to the substrate (1). a coating means (M1) for forming a laminated body of the "unhardened layer (L1) / substrate (1)" layer having a single layer of the resin liquid (R) and having a fluid uncured layer (L1); The uncured layer (L1)/substrate (1) layer constituting the laminate uncured layer (L1) is irradiated with an active energy ray to be cured, whereby the uncured layer (L1) is changed to reduce fluidity. The adhesion-promoting layer (L2)/substrate (1) layer of the adhesion-promoting layer (L2) constitutes a thickening active energy ray irradiation means (M2) of the laminated body; and the above-mentioned uncured type is formed on the above-mentioned substrate (1) The layer (L1), the step of forming the adhesion-promoting layer (L2), and the step of maintaining the viscosity-increasing state of the adhesion-promoting layer (L2) are linked control means (C1).

(The action mechanism of the present invention 1)

-1-

In general, the ultraviolet curable resin composition is a radical polymerization type represented by an acrylate type, and a cationic polymerization type represented by an epoxy type. There is also a radical polymerization type mainly composed of polyfluorene.

When a radical polymerization type ultraviolet curable resin composition (referred to as "the former") and a cationic polymerization type ultraviolet curable resin composition (referred to as "the latter"), according to the literature, there will be The tendency is as follows.

(1) Regarding the hardening shrinkage ratio, the latter has a smaller shrinkage ratio than the former.

(2) Regarding the hardening inhibition property of oxygen, it is suppressed by the hardening by oxygen with respect to the former, and the latter is less susceptible to the hardening suppression by oxygen.

(3) When the ultraviolet irradiation is stopped, the hardening reaction is stopped with respect to the former, and the latter continues the hardening reaction.

-2-

The first invention of Patent Application No. 1 of the patent document 1 described in the [Prior Art] is based on the use of a cationic ultraviolet curable adhesive. Therefore, when the curing reaction is started by ultraviolet irradiation, even if the ultraviolet irradiation is stopped, the hardening reaction proceeds, and the hardening inhibition by oxygen is hardly suppressed. Therefore, it is understood that the main hardening is performed about 5 minutes after the irradiation is stopped.

-3-

On the other hand, in the present invention, the use of a radical polymerization type optically transparent resin liquid (R) is an essential requirement. Therefore, the uncured layer (L1) formed by the first step (P1) is irradiated with an active energy ray to be hardened, and the uncured layer (L1) is changed to a viscosity-increasing layer. (L2), after the second step (P2) of forming the layered body, the layer of the layer of the adhesion-promoting layer (L2)/substrate (1) is placed in the second step (P3). The adhesion-promoting layer (L2) after P2) can maintain this viscosity-increasing state.

Then, after the third step (P3), the adhesion-promoting layer (L2) can be maintained in the thickened state by the fourth step (P4), which will be described later, until the fifth step (P5) is started.

Furthermore, during such placement or standby, the adhesion-promoting layer (L2) after the second step (P2) is exposed to air (ie, oxygen), but this condition is to maintain the adhesion-promoting layer (L2). The viscosity-increasing state contributes.

Accordingly, the present invention is basically different from the invention of Patent Document 1 in terms of technical idea.

(Action mechanism 2 of the present invention)

As described above, in the invention of Patent Document 2, the preliminary hardening and the main hardening which are performed from the substrate side by ultraviolet irradiation are performed in a state in which the "substrate/ultraviolet cured resin layer/display panel" is laminated, and thus basically Different from the present invention.

Further, in the invention of Patent Document 2, preliminary hardening is not performed by "preliminary hardening" of the entire ultraviolet curable resin layer formed, but only the pattern portion is hardened (for example, if the pattern is a circle, the preliminary hardened portion becomes a cylinder) In this regard, it is also substantially different from the present invention.

Accordingly, the present invention is substantially different from the invention of Patent Document 2 regardless of the technical idea and the specific means.

(Effect of the present invention)

-1-

The first step (P1) of the method for producing an optical laminated structure according to the present invention is obtained by applying a radical polymerization type optically transparent resin liquid (R) to a substrate (1) to obtain the substrate (1). The step of forming the laminated body by forming the "unhardened layer (L1) / substrate (1)" layer having the single layer of the resin liquid (R) and having the fluid uncured layer (L1).

This first step (P1) has a commonality with the conventional OCR coating method (method of applying a liquid optical transparent resin to a substrate).

By the way, it is conventionally difficult to ensure the fluidity and the leveling property while eliminating the droop and the bias in accordance with the OCR coating method, but the present invention performs the first step by the second step (P2). (P1) The uncured layer (L1) is irradiated with an active energy ray to be hardened, and the viscous layer (L2) which changes the uncured layer (L1) into a viscosity-increasing layer (L2) is obtained. The /substrate (1)" layer constitutes a laminate, so that it can be removed while ensuring the necessary fluidity and uniformity. In addition to droop and bias. That is, the advantages of the conventional OCR coating method are utilized, and the disadvantages of the conventional OCR coating method are eliminated.

-2-

Conventional OCA bonding method using a flaky adhesive, because there is no obstacle such as dripping and biasing of the OCR coating method, the adhesion to the substrate is easy, but it is easy to seal along the periphery of the substrate (printing gradient) A gap occurs in the inner side, and it is difficult to bury the gap according to the degree of the gradient.

However, the present invention utilizes the adhesion-promoting layer (L2) formed in the second step (P2) because the gap can be completely buried because of moderate fluidity.

Further, in the subsequent step, when the other substrate (2) is bonded from above the adhesion-promoting layer (L2) in accordance with the fourth step (P4), the pressure at the time of bonding is also traced to the adhesion-promoting layer (L2). And flowing, so that the laminated body after bonding does not cause a dead angle due to insufficient filling of the adhesion-promoting layer (L2), so even if the main hardening is performed according to the fifth step (P5), the formal hardened layer (L3) There is still no air bubble remaining between the other substrate (2).

According to the present invention, the uncured layer (L1) formed by the first step (P1) is irradiated with the active energy ray of the second step (P2) to form the adhesion-promoting layer (L2). Knowing the function of the OCA sticking method can also completely eliminate the shortcomings that the OCA sticking method is difficult to overcome.

-3-

As described above, the present invention is not a technique intermediate between the conventional OCR coating method and the conventional OCA bonding method, but can be said to be a novel technical idea that is substantially different from the two methods regardless of the technical idea and effect.

1‧‧‧Substrate

2‧‧‧Substrate

2E‧‧‧Edge

L1‧‧‧Unhardened layer

L2‧‧‧ adhesion layer

L3‧‧‧ formal hardened layer

P1‧‧‧Step 1

P2‧‧‧Step 2

P3‧‧‧Step 3

P4‧‧‧Step 4

P5‧‧‧Step 5

M1‧‧‧ Coating means

M2‧‧‧Active energy line irradiation

M3‧‧‧Active energy line irradiation

S‧‧‧ platform

S1‧‧‧Installation Department

S2‧‧‧ Coating Department

S3‧‧‧Active Energy Ray Irradiation Department

Z1‧‧‧Installation Department

Z2‧‧‧Installation Department

Z3‧‧‧Transfer Department

Z4‧‧‧Fitting Department

OCR‧‧‧Optical transparent resin

OCA‧‧‧Optical transparent adhesive

b‧‧‧Band bubbles

Fig. 1 is a schematic explanatory view showing a manufacturing method and a manufacturing apparatus of the present invention.

Fig. 2 is a schematic explanatory view showing an example of a manufacturing method and a manufacturing apparatus of the present invention, and (A) is a The plan view and (B) are front views.

Fig. 3 is a schematic explanatory view (plan view) showing an example of a vacuum bonding apparatus corresponding to the fourth step (P4) and the fifth step (P5) of the manufacturing method of the present invention.

Figure 4 is a schematic illustration of the problem of the conventional OCR coating method.

Figures 5(A) to (D) are schematic illustrations of the problems of the conventional OCA pasting method.

Hereinafter, the present invention will be described in detail.

Fig. 1 is a schematic explanatory view showing a manufacturing method and a manufacturing apparatus of the present invention.

[Manufacturing method of laminated structure for optics]

The manufacturing method of the optical laminated structure of the present invention is composed of the first step (P1), the second step (P2), and the third step (P3) as described in detail below.

After the third step (P3), the fourth step (P4) and the fifth step (P5) described later may be designed. Further, the fourth step (P4) and the fifth step (P5) may be carried out as a consistent step (that is, online) after the first to third steps (steps P1 to P3).

(Step 1 (P1))

-1-

In the first step (P1), a radical polymerization type optically clear resin liquid (R) is applied onto the substrate (1) to obtain a single layer of the resin liquid (R) formed on the substrate (1). The "unhardened layer (L1) / substrate (1)" layer of the fluid uncured layer (L1) constitutes a laminate.

The application of the optically transparent resin liquid (R) to the substrate (1) is carried out by using a coating means (M1) (particularly by using a coater having a slit nozzle which discharges from a wide slit). This is described in detail in the description of the apparatus of the present invention.

-2-

As the substrate (1), a glass substrate, a plastic substrate, a ceramic substrate, or a semiconductor can be used. Various single-layer substrates including a substrate and a woven substrate, a substrate having a conductive layer, various display modules such as a liquid crystal module or a liquid crystal display panel, and various multiplexed or composite substrates including a recording substrate having a reflective layer. From the viewpoint of functionality, a cover glass, a sensing glass, various modules, and the like can be exemplified.

-3-

The term "optical transparent resin liquid (R)" means "optical transparent resin (OCR)" as described in the prior art, and the present invention is irradiated with activity in the second step (P2) (and the fifth step (P5)). The energy ray is thickened and hardened, and thus the optically transparent resin liquid (R) is viscous and hardened by irradiation with an active energy ray (ie, ultraviolet ray or electron beam).

In the optically transparent resin liquid (R), any of the ultraviolet curable resin composition and the electron beam curable resin composition can be used, and when the electron beam curable resin composition is used, the burden of equipment costs increases. An electron beam curable resin composition is often used when it is required to be compatible with productivity. Further, when an electron beam curable resin composition is used, it is not necessary to use a photoinitiator or a sensitizer in the composition.

Here, when performing production on a normal scale, it is recommended to use an ultraviolet curable resin composition.

In the description of the present invention, the following description relates to the case of using an ultraviolet curable resin composition, but the purpose is not to exclude the use of the electron beam curable resin composition.

-4-

When an ultraviolet curable resin composition is used for the optically transparent resin liquid (R), a photopolymerizable prepolymer (photopolymerizable oligomer), a photopolymerizable monomer, a photoinitiator, an auxiliary agent, etc. can be used. The constituents of the composition. At present, most manufacturers have listed a variety of ultraviolet curable resin compositions.

Here, examples of the photopolymerizable prepolymer are polyester acrylate and polyurethane acrylate. Ester, epoxy acrylate, polyester urethane acrylate, polyol acrylate, and the like.

The acrylate system covers the concept of methacrylate.

Examples of the photopolymerizable monomer are monofunctional, difunctional, trifunctional or higher polyfunctional acrylates.

Most of the photoinitiators are used in combination with a sensitizer.

Examples of the auxiliary agent include a light stabilizer, a thermal stabilizer, a plasticizer, and the like. The solvent is not used in principle, and can be used in a small amount.

-5-

As described above, in the first step (P1) of the present invention, the above-mentioned resin liquid is formed on the substrate (1) by coating a radical polymerization type optically transparent resin liquid (R) on the substrate (1). R) A step of forming a laminate by the "unhardened layer (L1) / substrate (1)" layer having a single layer and having a fluid uncured layer (L1).

In the first step (P1), the uncured layer (L1) of the resin liquid (R) is formed on the substrate (1), and the uncured layer (L1) of the resin liquid (R) is not formed between the "two substrates". ).

-6-

The degree of viscosity of the radically polymerizable optically clear resin liquid (R) to be applied (to the same degree as the viscosity of the unhardened layer (L1) of the coating layer) can be commercially investigated in accordance with ASTM D1084. The viscosity to be measured is, for example, about 10 to 50,000 mPa/25 ° C, and the appropriate viscosity is selected therefrom. Usually, those who use 500 to 30000 mPa/25 °C, and then 800 to 20000 mPa/25 °C, especially 1000 to 15000 mPa/25 °C. The intermediate viscosity in this viscosity will evoke honey viscosity or thixotropy (shake denaturation) at room temperature of 25 °C.

Furthermore, it is not provided that the above-mentioned optically transparent resin liquid (R) and its coating layer to be coated are not hard. The hardening rate (or degree of hardening) of the layer (L1) belongs to the resin liquid at the stage before the irradiation of the active energy ray, and thus is almost 0 or close to zero.

-7-

The thickness of the single-layer coating of the optically transparent resin liquid (R) on the substrate (1), that is, the thickness of the uncured layer (L1) is not particularly limited, and the shell used in an electronic device such as an input device or a display device is used. The body is usually set to, for example, 0.01 to 2 mm, further 0.05 to 1.0 mm, and particularly 0.08 to 0.5 mm.

(Step 2 (P2))

-1-

In the second step (P2), the uncured layer (L1) formed by the first step (P1) is irradiated with an active energy ray to be cured, whereby the uncured layer (L1) is changed to fluidity. The reduced adhesion layer (L2)/substrate (1) layer of the adhesion-promoting layer (L2) constitutes a laminate. The active energy ray that is illuminated represents an example of ultraviolet light, and an electron beam can also be used as the case may be.

-2-

In the present invention, the viscous material was mounted on a sample support frame and analyzed using a model "Varian 610-IR" manufactured by VARIAN. In the preliminary experiment, the hardening reaction is carried out by ultraviolet irradiation, and the appropriate peak which is easy to quantitatively measure from the peak reduction is selected as the eye peak, and based on the peak height or area when the peak is not hardened. The hardening rate (or degree of hardening) is determined from the degree of peak height or area reduction caused by the hardening reaction. Since the degree of reduction of the uncured material is 0, the hardening rate (or degree of hardening) is 0%, and the hardening rate (or degree of hardening) when hardened and becomes a completely cured product is 100%.

Further, in the present invention, the curing rate (or degree of hardening) of the adhesion-promoting layer (L2) is preferably set in the range of 20 to 80%. A better range is 25 to 70%, and a particularly good range is 30 to 60%.

(Step 3 (P3))

-1-

In the third step (P3) of the present invention, the adhesion-promoting layer (L2) of the layered body is formed by the layer of the adhesion-promoting layer (L2)/substrate (1) after the second step (P2), and the adhesion-promoting state is maintained. A step of. The maintenance of the viscosity-increasing state is based on the properties of the "adhesive layer (L2)" formed by the second step (P2).

Accordingly, the third step (P3) has the function of maintaining the hardening rate (or hardening degree) associated with the degree of viscosity of the adhesion-promoting layer (L2) after the second step (P2). The maintenance time can be set to a long period from, for example, a short time of about 10 seconds to several hours, several days or more, and the next step (the fourth step (P4) and the fifth step (P5 described later) can be used. The storage and standby time between the )) are set to the third step (P3), so that there is no disadvantage in terms of the steps.

This third step (P3) appears to be a negative step, but it is a necessary step of guaranteeing the characteristics or quality of the final product (input device, display device) by maintaining the viscosity of the adhesion-promoting layer (L2).

-2-

In the second step (P2), when the irradiation of the active energy ray is stopped, the viscosity of the adhesion-promoting layer (L2) is stopped due to the original optically transparent resin liquid (R)-based radical polymerization type resin liquid. This value is maintained substantially thereafter. The adhesion-promoting layer (L2) formed on the substrate (1) is exposed to the air environment (i.e., the oxygen environment) and contributes to the degree of viscosity of the adhesion-promoting layer (L2).

(Step 4 (P4) and Step 5 (P5))

-1-

After the third step (P3), the next fourth step (P4) and the fifth step (P5) can be carried out (online or at another facility in the factory).

However, the laminated structure after the third step (P3) ("adhesion-promoting layer (L2) / substrate (1)" layer formation The laminate can be supplied as a product and supplied to the market. Therefore, the following fourth step (P4) and fifth step (P5) can also be carried out in the factory of the supplier (for example, a company with a bonding device). .

-2-

In the fourth step (P4), after the third step (P3), the layer of the adhesion-promoting layer (L2)/substrate (1) is formed into a laminate, and the substrate (2) is vacuumed. The bonding process is a step of forming a laminate by the "substrate (2) / adhesion-promoting layer (L2) / substrate (1)" or "substrate (1) / adhesion-promoting layer (L2) / substrate (2)" layers.

The fifth step (P5) is a step of irradiating the layered body after the fourth step (P4) with an active energy ray to make the adhesion-promoting layer (L2) a final hardened layer (L3).

-3-

First, as the substrate (1), various single-layer or multi-layer (composite) substrates including "glass substrate, plastic substrate, ceramic substrate, semiconductor substrate, woven substrate, and various modules" are used as described above. The other substrate (2) used in the step (P4) is a counterpart (opposing) substrate when combined with the substrate (1), and thus the same as the substrate (1) described above can be used.

-4-

By the active energy ray irradiation of the fifth step (P5), the adhesion-promoting layer (L2) of the hardening reaction is completely or substantially stopped, and then the main hardening which belongs to the new hardening reaction is started. As described above, the adhesion-promoting layer (L2) is located between the "substrate (2) / adhesion-promoting layer (L2) / substrate (1)" or "substrate (1) / adhesion-promoting layer (L2) / substrate (2)" The layer, because the two sides are covered by the substrate, the air (i.e., oxygen having a function of inhibiting the hardening reaction) is blocked. Therefore, by the second active energy ray irradiation, the adhesion-promoting layer (L2) hardening reaction is smoothly performed, and the adhesion-promoting layer (L2) becomes the main hardened layer (L3).

Furthermore, the active energy ray irradiation of the fifth step (P5) is performed by active energy ray penetration. It can also be carried out from either side of the substrate (1) or the substrate (2).

[Manufacturing device for laminated structure for optics/one] (Manufacturing apparatus for performing the first step (P1) to the third step (P3))

-1-

The apparatus for producing an optical layered structure of the present invention for carrying out the first step (P1) to the third step (P3) of the above-described production method is provided by applying a radical polymerization on the substrate (1) The active energy ray-curable optically transparent resin liquid (R) is obtained by forming an "unhardened layer" having a single layer of the resin liquid (R) and having a fluid uncured layer (L1) on the substrate (1). The L1)/substrate (1) layer constitutes a layered body coating means (M1); and the uncured layer (L1) constituting the laminated body of the "unhardened layer (L1) / substrate (1)" layer is irradiated with an activity The uncured layer (L1) is changed to a viscosity-reducing layer (L2) of the adhesion-promoting layer (L2)/substrate (1) layer to form a thickened layer. Active energy ray irradiation means (M2); and for forming the uncured layer (L1) on the substrate (1), forming the adhesion-promoting layer (L2), and further increasing the adhesion layer (L2) The linkage control means (C1) for interlocking control in each step such as maintaining the viscosity state.

(Coating means (M1))

-1-

The coating means (M1) for forming the uncured layer (L1) is not particularly suitable as a means for applying a radically polymerizable optically clear resin liquid (R) layered on the substrate (1). limit.

-2-

As a coating means (M1), the person who first comes to mind is used as in the [prior art] In Patent Document 1 and Patent Document 2, for example, a means for applying a coating using a dispenser is used. Next, the person who floats on the mind is a means for performing coating by screen printing and a means for applying coating by an inkjet method.

-3-

However, in these coating means, the means for applying the coating by the dispenser is to apply the optically transparent resin liquid (R) so as to cover the entire area of the predetermined area of the substrate (1), and it is necessary to reciprocate the dispenser. After the moving side is applied in a strip shape or a dot pattern, the resin liquid (R) after application is flowed in accordance with the remaining gap portion of the coating, so that the scanning time of the dispenser and the flow of the resin liquid (R) The time required will become longer, leading to extreme problems in processing speed.

-4-

The means for performing coating by screen printing is a means for printing an optically transparent resin liquid (R) on a substrate (1) through a hole of a screen, but the following disadvantageous problem is derived: it is necessary to increase the setting of the resin liquid (R) Viscosity; in order to form a thick film on the printed layer, it is necessary to thicken the hole of the screen. If this is done, the surrounding edge of the printed layer is not easy to be clear; when the operation is repeated, the screen will inevitably have a plug condition, and thus There is a tendency for the film thickness to become thinner, and it is necessary to interrupt the printing operation from time to time and perform screen cleaning; it is necessary to carry out the printing method of the doctor blade operation, which is accompanied by the lifting of the screen, or the spread of the coating liquid on the screen. Make sure that the space required for coating is the same.

-5-

The means for applying the coating by the ink jet method has a problem in that it is difficult to form a thick film coating layer; since the nozzle plug is likely to occur, the continuous operation time is limited.

-6-

Therefore, the means for applying by the dispenser, the means for performing coating by screen printing, and the means for applying by the inkjet method are used in the first step (P1) of the present invention. Although the coating means (M1) can be used, it is difficult to say that it is the best means or a preferred means.

-7-

In order to achieve the object of the present invention, the coating means (M1) for forming the uncured layer (L1) is preferably a coating material corresponding to the substrate (1) corresponding to the optically transparent resin liquid (R). "Coating machine having a slit nozzle that discharges from a wide slit". Further, the coater may be subjected to a single sheet treatment of the substrate (1), and it is preferable to strictly set the discharge amount once.

(Active energy ray irradiation means (M2))

In the active energy ray irradiation means (M2), an ultraviolet ray irradiation apparatus (UV irradiation apparatus) means an irradiation apparatus using a lamp such as a high pressure mercury lamp, a metal halide lamp (such as a mercury-xenon lamp), a xenon lamp, or an LED lamp. There are no ozone type and ozone type, and there are differences depending on the surface hardenability of the coating layer. There are various types of film output systems. The lamp system has a concentrating type and a diffusing type. Regarding the wavelength, it is possible to select a person having a higher ultraviolet intensity at 365 nm and a higher ultraviolet intensity at 254 nm, and in addition to the ultraviolet rays, a lamp of various wavelengths including 405 nm and 436 nm visible light can be selected.

In the active energy ray irradiation means (M2), various apparatuses can be obtained from each company with respect to the electron beam irradiation apparatus (EB apparatus).

(Linkage control means (C1))

-1-

The interlocking control means (C1) is for forming the uncured layer (L1), the adhesion-promoting layer (L2) on the substrate (1), and maintaining the adhesion-promoting state of the adhesion-promoting layer (L2). The step of the linkage control. Furthermore, the processing between the steps may perform a single processing on the single substrate (1), or may perform continuous processing on the long substrate material or the connected substrate.

-2-

The interlocking control means (C1) is to position the substrate (1) on the production line (platform, etc.) After the first step (P1), the second step (P2), and the third step (P3), the substrate (1) is moved to a predetermined place or a height is adjusted. In the first step (P1), means for controlling the advancement and retreat of the substrate (1) coating means (M1), adjustment of the coating amount, timing of coating start and interruption, and in the second step (P2), for the substrate ( 1) means for controlling the irradiation timing of the active energy ray irradiation means (M2) of the uncured layer (L1) on the upper side; in the third step (P3), the adhesion-promoting layer on the substrate (1) (L2) A means of maintaining the state of the viscosity increase (temporary or means of placing it outside the production line due to standby).

[Manufacturing device for laminated structure for optics/Second] (Manufacturing apparatus for carrying out the fourth step (P4) to the fifth step (P5))

After performing the first step (P1) to the third step (P3) of the above-described manufacturing method, and further performing the fourth step (P4) to the fifth step (P5), it is necessary to increase the third step (P3). The layer of the adhesive layer (L2)/substrate (1) constitutes a laminate and is bonded to the other substrate (2) under vacuum to form a "substrate (2) / adhesion-promoting layer (L2) / substrate (1)" Or the "substrate (1) / adhesion-promoting layer (L2) / substrate (2)" layer constitutes a bonding means (M3) of the laminated body; in the bonded state, the active energy ray is irradiated to make the adhesion-promoting layer (L2) The active energy ray irradiation means (M4) for the main hardening layer (L3); and the interlocking control means (C2) for controlling the steps of the bonding and the main hardening in conjunction with each other.

(Means of fitting (M3))

An example of the bonding means (M3) is as described in the following examples. As the bonding means (M3), the same apparatus as the conventional vacuum bonding apparatus which has been put to practical use by the applicant of the present application, and a conventionally known vacuum bonding apparatus can be used. In addition, when performing bonding under vacuum conditions, "under vacuum conditions" means "under reduced pressure conditions".

(Active energy ray irradiation means (M4))

In order to use the adhesion-promoting layer (L2) as the active energy ray irradiation means (M4) for forming the main hardening layer (L3), the same as the above-described active energy ray irradiation means (M2) can be used.

(Linkage control means (C2))

The interlocking control means (C2) is a method of performing the fourth step (P4) and the fifth step (P5), and supplying the substrate (1) and the substrate (2) to a predetermined portion, or moving or adjusting the height, Alternatively, the angle may be reversed, or the angle between the two substrates (1) and (2) may be adjusted by the assistance of an auxiliary means such as a camera, or the irradiation timing of the energy ray irradiation means (M3) or the means for performing the removal may be performed. .

[Examples]

The invention will be further illustrated by the following examples.

[Examples] (schematic description)

Fig. 1 is a schematic explanatory view showing a manufacturing method and a manufacturing apparatus of the present invention as described above.

Fig. 2 is a schematic explanatory view showing an example of a manufacturing method and a manufacturing apparatus of the present invention, wherein (A) is a plan view and (B) is a front view.

Fig. 3 is a schematic explanatory view (plan view) showing an example of a vacuum bonding apparatus corresponding to the fourth step (P4) and the fifth step (P5) of the manufacturing method of the present invention.

(Step 1 (P1) to Step 3 (P2))

-1-

In Fig. 2 (A) and (B), the (S) system is a platform. The right side mounting portion (S1) of the platform (S), the left side coating portion (S2) of the platform (S), and the active energy ray irradiation portion (S3) at the center of the platform (S).

The substrate (1) is placed on the platform (S) via the "mounting portion (S1) → coating portion (S2) → active energy ray irradiation portion (S3)", and is returned to the position of the first mounting portion (S1) again. Take out of the system outer. The subsequent substrates (1) are also sequentially placed in the cycle. (In addition, in Fig. 2, since the mounting portion (S1) and the take-out portion are located at the same place, the substrate (1) having the adhesion-promoting layer (L2) taken out is not shown in the mounting portion (S1). The series of loops described above can be easily and clearly understood from Fig. 1 which is described in series in the order of "Step (P1) → Step (P2) → Step (P3)").

-2-

The description will be made with respect to 1 cycle using FIG.

In this embodiment, first, the substrate (1) is manually attached to the mounting portion (S1) on the right side of the stage (S), and then the substrate (1) is moved to the coating portion on the left side of the platform (S) by electric power (S2). ).

-3-

Next, in the application portion (S2), the substrate (1) is moved toward the right direction of FIG. 2 while moving toward the substrate (1) from the coating means (M1). A coating machine with a wide slit nozzle (with a quantitative discharge pump), discharges a predetermined amount of the ultraviolet curable resin liquid (R), and flows down, and forms an uncured layer of the resin liquid (R) on the substrate (1). (L1). (Step 1 (P1))

-4-

Next, the substrate (1) on which the uncured layer (L1) has been formed is subjected to the active energy ray irradiation means (M2) while passing through the active energy ray irradiation portion (S3) at the center of the stage (S) at the same speed as described above. The uncured layer (L1) formed on the substrate (1) is viscous by quantitative ultraviolet irradiation, and becomes an adhesion-promoting layer (L2). (Step 2 (P2))

-5-

Next, the substrate (1) on which the adhesion-promoting layer (L2) has been formed is moved by the electric motor at the same speed as described above, and moved to the mounting portion (S1) on the right side of the platform (S) at the original position, and the manual portion is used to manually The substrate (1) on which the adhesion-promoting layer (L2) is formed is moved to a standby portion (not shown).

-6-

In the standby portion, the "adhesive layer (L2) / substrate (1)" laminated structure is stored for an arbitrary period of time (for example, several hours to several days), but the adhesion-promoting layer (L2) is maintained in the same thickened state. In this standby state, the adhesion-promoting layer (L2) was exposed to air (i.e., oxygen), but no hardening was observed and it was hardened. (Step 3 (P3))

(Step 4 (P4) to Step 5 (P5))

-1-

In order to carry out the fourth step (P4) and the fifth step (P5), the laminated structure composed of the "adhesive layer (L2) / substrate (1)" in the third step (P3) in the standby state is It is supplied to the vacuum laminating apparatus shown in Fig. 3.

-2-

In the lower left portion of FIG. 3, a mounting portion (Z1) of one of the substrates (substrate or substrate laminate) to be bonded is provided, and the lower right portion of FIG. 3 is provided with another substrate (substrate or substrate) to be bonded. Mounting part (Z2) of the laminated body).

The upper left portion of FIG. 3 is a transfer portion (Z3) that transfers the substrate or the like from the lower left portion to the upper right portion.

The upper right portion of FIG. 3 is a bonding portion (Z4) which is bonded to a substrate or the like from the lower left portion and a substrate from the lower right portion under vacuum.

-3-

First, the "adhesive layer (L2) / substrate (1)" laminated structure after the third step (P3) of the second step (P2) is attached to the mounting portion (Z2) on the lower right side.

On the other hand, the substrate (2) is mounted on the mounting portion (Z1) on the lower left side.

Next, the substrate (2) is moved to the upper left mounting portion (Z3).

-4-

Next, the substrate (2) located at the upper left mounting portion (Z3) is moved to the bonding portion (Z4) on the upper right side, and the adhesion promoting layer (L2)/substrate (1) on the lower right mounting portion (Z2) is caused. The laminated structure is moved to the bonding unit (Z4) on the upper right side and placed, and then the bonding step (Z4) is subjected to the fourth step (P4) of bonding under vacuum.

-5-

As a result, bonding is performed under vacuum conditions, and a bonded structure composed of a "substrate (2) / adhesion-promoting layer (L2) / substrate (1)" layer is obtained. Therefore, the activity (not shown in FIG. 3) is used. The fifth step (P5) of making the previous adhesion-promoting layer (L2) the main hardened layer (L3) is performed by ultraviolet irradiation of the energy ray irradiation means (M3).

-6-

After the vacuum is released, the bonded structure is moved to the lower right mounting portion (Z2) of FIG. 3, and taken out of the vacuum bonding apparatus. Thereby, a final laminated structure composed of "substrate (1) / main hardened layer (L3) / substrate (2)" was obtained.

(set conditions and results)

-1-

The conditions of this embodiment are set as follows:

‧Substrate (1): Glass substrate, size 190mm × 240mm

‧Substrate (2): Substrate with white decorative part and 15mm wide edge banding (2E), size 190mm × 240mm

‧Optical transparent resin liquid (R): Free radical polymerization type acrylic ultraviolet curable resin liquid

‧ Viscosity degree η of the above optically transparent resin liquid (R): viscosity measured according to ASTM D1084 is 3000 mPa / 25 ° C

‧Uncoated layer (L1) coating area: 160mm × 210mm

‧Unhardened layer (L1) thickness: 150μm, 200μm

‧The degree of viscosity of the unhardened layer (L1) η: approximately the same as the viscosity of the resin solution (R)

‧ Hardening rate of unhardened layer (L2): 0%

‧ Hardening rate of adhesion-promoting layer (L2): 3 levels of 30%, 50%, 70%

‧ Hardening rate of the official hardened layer (L3): roughly 100%

‧The edge of the substrate (2) (2E) thickness: 80μm, 50μm

-2-

According to the above two kinds of levels × 3 kinds of levels × 2 kinds of levels, a total of 12 kinds of arrangement and combination, from the side of the substrate (2), it was found that the 12 levels were not found along the gradient with the edge seal (2E). Ribbon bubble (b).

Incidentally, according to the conventional OCA bonding method, when the substrate (1) is bonded to the substrate (2) having the edge seal (2E), it is inevitable to find the edge and the edge seal (2E). Gradient banded bubbles (b).

[Industrial availability]

The optical laminated structure manufactured by the method and apparatus of the present invention is extremely useful as an electronic device including a display device and an input device.

1‧‧‧Substrate

2‧‧‧Substrate

L1‧‧‧Unhardened layer

L2‧‧‧ adhesion layer

L3‧‧‧ formal hardened layer

P1‧‧‧Step 1

P2‧‧‧Step 2

P3‧‧‧Step 3

P4‧‧‧Step 4

P5‧‧‧Step 5

M1‧‧‧ Coating means

M2‧‧‧Active energy line irradiation

M3‧‧‧Active energy line irradiation

Claims (5)

A method for producing an optical layered structure is composed of the following step: a first step (P1) of applying a radical polymerization type active energy ray-curable optically transparent resin liquid onto a substrate (1) ( R), a layer of "unhardened layer (L1) / substrate (1)" having a single layer of the resin liquid (R) formed on the substrate (1) and having a fluid uncured layer (L1) is obtained. The second step (P2) is obtained by irradiating an uncured layer (L1) of the laminate obtained in the first step (P1) onto an uncured layer (L1) to be hardened by an active energy ray. The hardened layer (L1) is changed to a laminated body composed of a layer of the adhesion-promoting layer (L2)/substrate (1) of the adhesion-promoting layer (L2) having reduced fluidity; and a third step (P3), which is The adhesion-promoting layer (L2) of the layered body composed of the layer of the adhesion-promoting layer (L2)/substrate (1) after the second step (P2) is maintained in the state of being thickened. The manufacturing method of claim 1, wherein after the third step (P3), the fourth step (P4) is provided, wherein the layer of the adhesion-promoting layer (L2)/substrate (1) is provided. The laminated body is bonded to another substrate (2) under vacuum to become "substrate (2) / adhesion-promoting layer (L2) / substrate (1)" or "substrate (1) / adhesion-promoting layer (L2) a laminate of the layer structure of the substrate (2)"; and a fifth step (P5) of irradiating the active energy ray in the bonded state to make the adhesion-promoting layer (L2) a formal hardened layer (L3) ). A manufacturing apparatus for an optical laminated structure, comprising: a coating means (M1) for applying a radical polymerization type active energy ray-curable optically transparent resin liquid (R) to a substrate (1) And obtaining an unhardened layer (L1)/ of a single layered liquid reflowable layer (L1) on which the resin liquid (R) is formed on the substrate (1). a layered body composed of a layer of the substrate (1)"; an active energy ray irradiation means (M2) for tackifying the uncured layer of the "unhardened layer (L1) / substrate (1)" layer The layer (L1) is irradiated with an active energy ray to be hardened, thereby obtaining a "tackifying layer (L2) / substrate (1) of the tackifying layer (L2) in which the uncured layer (L1) is changed to have reduced fluidity. a layered body; and a linkage control means (C1) for forming the uncured layer (L1) on the substrate (1), forming the adhesion-promoting layer (L2), and maintaining the adhesion-promoting layer The steps of the thickening state of (L2) are controlled in conjunction. The manufacturing apparatus of the third aspect of the invention, wherein the coating means (M1) for forming the uncured layer (L1) has a slit nozzle for discharging the optically transparent resin liquid (R) from a wide slit. Cloth machine. The manufacturing apparatus of claim 3, comprising: a bonding means (C2) for forming the unhardened layer (L1), forming the adhesion-promoting layer (L2), and maintaining the viscosity-increasing After the layer (L2) is viscous, the layered body of the layer of the adhesion-promoting layer (L2)/substrate (1) is bonded to the other substrate (2) under vacuum to become the substrate (2). / / adhesion-promoting layer (L2) / substrate (1)" or "substrate (1) / adhesion-promoting layer (L2) / substrate (2)" layered layer; active energy beam irradiation means (M3) For applying the active energy ray in the bonded state, the adhesion-promoting layer (L2) is a formal hardened layer (L3); and the interlocking control means (C3) is used for the above-mentioned bonding And the steps of the formal hardening are linked to control.