JP6692709B2 - Method for manufacturing joined body, connection method - Google Patents

Method for manufacturing joined body, connection method Download PDF

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JP6692709B2
JP6692709B2 JP2016125983A JP2016125983A JP6692709B2 JP 6692709 B2 JP6692709 B2 JP 6692709B2 JP 2016125983 A JP2016125983 A JP 2016125983A JP 2016125983 A JP2016125983 A JP 2016125983A JP 6692709 B2 JP6692709 B2 JP 6692709B2
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bonding
pressure
light
image display
plate
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JP2017226806A (en
JP2017226806A5 (en
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橋本　孝夫
孝夫 橋本
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Dexerials Corp
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Dexerials Corp
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Priority to KR1020217017708A priority patent/KR102483283B1/en
Priority to CN201780035930.2A priority patent/CN109312195B/en
Priority to KR1020187035698A priority patent/KR20190007001A/en
Priority to PCT/JP2017/019509 priority patent/WO2017221625A1/en
Priority to TW106118521A priority patent/TWI763676B/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/10—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
    • B32B37/1018—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the pressing technique, e.g. using action of vacuum or fluid pressure using only vacuum
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J201/00—Adhesives based on unspecified macromolecular compounds
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2457/00—Electrical equipment
    • B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays

Description

本技術は、真空雰囲気下で、第１の貼合部材と第２の貼合部材とを、貼合樹脂材を介して貼り合わせて接合体を製造する製造方法、及び第１の貼合部材と第２の貼合部材とを、貼合樹脂材を介して接続する接続方法に関する。   The present technology is a manufacturing method for manufacturing a bonded body by bonding a first bonding member and a second bonding member via a bonding resin material under a vacuum atmosphere, and a first bonding member. And a second bonding member are connected to each other via a bonding resin material.

スマートホン等の情報端末に用いられている液晶表示パネル等の画像表示装置は、液晶表示パネルや有機ＥＬパネル等の画像表示部材と光透過性カバー部材との間に、光硬化性樹脂組成物を配した後、その組成物に紫外線を照射して硬化させて光透過性硬化樹脂層とし、それにより画像表示部材と光透過性カバー部材とを接着・積層することにより製造されている。   An image display device such as a liquid crystal display panel used for an information terminal such as a smart phone has a photocurable resin composition between an image display member such as a liquid crystal display panel or an organic EL panel and a light transmissive cover member. And then the composition is irradiated with ultraviolet rays to be cured to form a light-transmissive cured resin layer, and the image display member and the light-transmissive cover member are thereby bonded and laminated.

画像表示部材と光透過性カバー部材とが光透過性硬化樹脂組成物を介して接続する方法として真空貼合工法が用いられている。図９〜図１１に真空貼合工法の一例を示す。図９に示すように、光透過性カバー部材５０は、貼り合わせ面に光透過性樹脂組成物５１が塗布され、適宜仮硬化された後、真空チャンバー５５内において、第１の貼合プレート５２によって貼り合わせ面を下方に向けて支持される。また、画像表示部材５３は、真空チャンバー５５内において、第２の貼合プレート５４によって貼り合わせ面を上方に向けて支持される。   A vacuum bonding method is used as a method for connecting the image display member and the light-transmitting cover member via the light-transmitting cured resin composition. 9 to 11 show an example of the vacuum bonding method. As shown in FIG. 9, the light-transmissive cover member 50 is coated with the light-transmissive resin composition 51 on the bonding surface and is temporarily cured appropriately, and then, in the vacuum chamber 55, the first bonding plate 52. Is supported with the bonding surface facing downward. Further, the image display member 53 is supported in the vacuum chamber 55 by the second bonding plate 54 with the bonding surface facing upward.

次いで、真空チャンバー５５内が排気され真空雰囲気とされる。その後、図１０に示すように、第２の貼り合せプレート５４が上昇し、画像表示部材５３が光透過性樹脂組成物５１を介して光透過性カバー部材５０に押し当てられる。光透過性カバー部材５０及び画像表示部材５３は、真空雰囲気下で光透過性樹脂組成物５１を介して貼り合わされることにより、貼り合わせ面や光透過性硬化樹脂層中に気泡が残存することを防止することができる。   Then, the inside of the vacuum chamber 55 is evacuated to a vacuum atmosphere. Then, as shown in FIG. 10, the second bonding plate 54 is raised, and the image display member 53 is pressed against the light transmissive cover member 50 via the light transmissive resin composition 51. The light-transmissive cover member 50 and the image display member 53 are adhered to each other via the light-transmissive resin composition 51 in a vacuum atmosphere, so that air bubbles remain on the adhering surface or the light-transmissive cured resin layer. Can be prevented.

次いで、図１１に示すように、第１の貼り合せプレート５２による光透過性カバー部材５０の支持が解除され、第２の貼り合せプレート５４が下降される。この状態で、真空チャンバー５５内が大気圧に開放され、光透過性カバー部材５０及び画像表示部材５３の接合体５６が真空チャンバー５５から取り出される。   Next, as shown in FIG. 11, the support of the light transmissive cover member 50 by the first bonding plate 52 is released, and the second bonding plate 54 is lowered. In this state, the inside of the vacuum chamber 55 is opened to the atmospheric pressure, and the bonded body 56 of the light transmissive cover member 50 and the image display member 53 is taken out from the vacuum chamber 55.

その後、接合体５６は、光透過性樹脂組成物５１が硬化されることにより、光透過性硬化樹脂層を介して接続された光透過性カバー部材５０及び画像表示部材５３の画像表示装置が完成する。   After that, in the joined body 56, the image display device including the light-transmitting cover member 50 and the image display member 53 connected through the light-transmitting cured resin layer is completed by curing the light-transmitting resin composition 51. To do.

特開２０１４−１１８４５０号公報JP, 2014-118450, A

近年は、画像表示装置の狭額縁化が進み光透過性カバー部材５０と画像表示部材５３との貼合精度に対する要求は高くなっている。しかし、真空貼合工法においては、大気圧解放を行った際、真空チャンパー５５内に急激な圧力変動や乱気流が発生し、特に光透過性樹脂組成物５１が液状やゲル状であった場合、光透過性カバー部材５０と画像表示部材５３との貼合位置にズレが生じてしまう。   In recent years, the frame of the image display device has become narrower, and the demand for the bonding accuracy of the light transmissive cover member 50 and the image display member 53 has increased. However, in the vacuum bonding method, when the atmospheric pressure is released, a sudden pressure fluctuation or turbulence occurs in the vacuum champer 55, and particularly when the light-transmitting resin composition 51 is in a liquid or gel state, The position where the light-transmissive cover member 50 and the image display member 53 are attached to each other is displaced.

大気圧の開放時間を長くとることで圧力変動や乱気流を小さくすることも可能であるが、未硬化の光透過性樹脂組成物５１を介して接合された光透過性カバー部材５０の移動を完全に抑制することは難しく、また製造タクトの短縮の要求から大気圧の開放時間を長くとることには限界もある。   Although it is possible to reduce pressure fluctuations and turbulence by increasing the atmospheric pressure release time, it is possible to completely move the light-transmissive cover member 50 joined via the uncured light-transmissive resin composition 51. It is difficult to suppress it to a certain level, and there is a limit to how long the atmospheric pressure can be released because of the demand for shortening the manufacturing tact.

また、大気導入時の影響を無くす為には、貼合プレートの下降をせずに大気を導入する工法も考えられる。しかし、この場合、大気導入が完了するまで光透過性カバー部材５０及び画像表示部材５３に貼合圧力が負荷された状態となり、必要以上に加圧時間を要する事となる。このため、光透過性樹脂組成物５１に残存応力が介在し、部分的に色ムラが発生するおそれがある他、薄型化が進展している画像表示部材に対する負荷が過大となり、反りの発生や損傷を与える恐れもある。   Further, in order to eliminate the influence at the time of introducing the atmosphere, a method of introducing the atmosphere without lowering the bonding plate may be considered. However, in this case, the bonding pressure is applied to the light transmissive cover member 50 and the image display member 53 until the introduction into the atmosphere is completed, which requires an unnecessarily long pressing time. Therefore, residual stress may be present in the light-transmissive resin composition 51 to cause partial color unevenness, and the image display member, which is becoming thinner, is overloaded and warps. May cause damage.

そこで、本技術は、真空雰囲気下で、第１の貼合部材と第２の貼合部材とを、貼合樹脂材を介して貼り合わせて接合体を製造するに際し、貼り合せ位置ズレを防止するとともに、第１、第２の貼り合せ部材及び貼り合せ樹脂材に対する過大な負荷を抑制することができる接合体の製造方法、及び接続方法を提供することを目的とする。   Therefore, the present technology prevents the displacement of the bonding position when manufacturing the bonded body by bonding the first bonding member and the second bonding member via the bonding resin material in a vacuum atmosphere. In addition, it is an object of the present invention to provide a method for manufacturing a joined body and a connecting method capable of suppressing an excessive load on the first and second bonding members and the bonding resin material.

上述した課題を解決するために、本技術に係る接合体の製造方法は、真空雰囲気下で、第１の貼合プレートに支持された第１の貼合部材と第２の貼合プレートに支持された第２の貼合部材とを、貼合樹脂材を介して所定の貼合圧力で貼り合わせる工程と、次いで、上記第１、第２の貼合部材が上記第１、第２の貼合プレートに挟持された状態で上記第１、第２の貼合プレートを離間させて、上記貼合圧力を減じる工程と、次いで、真空雰囲気下から大気圧へ開放する工程と、次いで、上記第１、第２の貼合部材に対する貼合圧力を解除する工程とを有するものである。   In order to solve the above-mentioned subject, the manufacturing method of the joined object concerning this art is supported by the 1st pasting member and the 2nd pasting plate supported by the 1st pasting plate under a vacuum atmosphere. A step of bonding the formed second bonding member with a predetermined bonding pressure via a bonding resin material, and then the first and second bonding members are bonded to the first and second bonding members. A step of reducing the bonding pressure by separating the first and second bonding plates in a state of being sandwiched by the bonding plate, a step of releasing from a vacuum atmosphere to atmospheric pressure, and then a step of And a step of releasing the bonding pressure applied to the second bonding member.

また、本技術に係る接続方法は、真空雰囲気下で、第１の貼合プレートに支持された第１の貼合部材と第２の貼合プレートに支持された第２の貼合部材とを、貼合樹脂材を介して所定の貼合圧力で貼り合わせる工程と、次いで、上記第１、第２の貼合部材が上記第１、第２の貼合プレートに挟持された状態で上記第１、第２の貼合プレートを離間させて、貼合圧力を減じる工程と、次いで、真空雰囲気下から大気圧へ開放する工程と、次いで、上記第１、第２の貼合部材に対する貼合圧力を解除する工程とを有するものである。
Moreover, the connection method which concerns on this technique WHEREIN: In a vacuum atmosphere, the 1st bonding member supported by the 1st bonding plate and the 2nd bonding member supported by the 2nd bonding plate. And a step of laminating with a predetermined laminating pressure via a laminating resin material, and then the first and second laminating members are sandwiched by the first and second laminating plates, and the first and second laminating plates are sandwiched between the first and second laminating plates. 1. A step of separating the first and second bonding plates to reduce the bonding pressure, a step of releasing the bonding pressure from the vacuum atmosphere to the atmospheric pressure, and then bonding to the first and second bonding members. And a step of releasing the pressure.

本技術によれば、第１の貼合部材と第２の貼合プレートとが一対の貼合プレート間に挟持された状態で貼合圧力を減じ、この状態で大気開放を行っているため、短時間で大気開放を行い、チャンバー内に急激な圧力変動や乱気流が発生した場合にも、第１の貼合部材と第２の貼合プレートとの貼合位置ズレを防止することができる。また、大気開放に先立って貼合圧力を減じていることから、大気開放後に貼合圧力を解除しても、接合体に反りが生じることなく、第１、第２の貼合部材への損傷を防止することができる。   According to the present technology, the bonding pressure is reduced when the first bonding member and the second bonding plate are sandwiched between the pair of bonding plates, and the atmosphere is opened in this state. It is possible to prevent the bonding position of the first bonding member and the second bonding plate from deviating from each other even when the pressure is changed or a turbulent air flow is generated in the chamber by opening the atmosphere in a short time. Further, since the bonding pressure is reduced prior to opening to the atmosphere, even if the bonding pressure is released after opening to the atmosphere, the bonded body will not warp and damage to the first and second bonding members will not occur. Can be prevented.

図１は、画像表示装置の一例を示す概略断面図である。FIG. 1 is a schematic sectional view showing an example of an image display device. 図２は、遮光層が設けられた光透過性カバー部材を示す断面図である。FIG. 2 is a cross-sectional view showing a light transmissive cover member provided with a light shielding layer. 図３は、光透過性カバー部材の表面に光透過性樹脂組成物を塗布した状態を示す断面図である。FIG. 3 is a cross-sectional view showing a state in which the light-transmitting resin composition is applied to the surface of the light-transmitting cover member. 図４は、光透過性カバー部材の表面に塗布された光透過性樹脂組成物に紫外線を照射し仮硬化樹脂層を形成する工程を示す断面図である。FIG. 4 is a cross-sectional view showing a step of irradiating the light transmissive resin composition applied to the surface of the light transmissive cover member with ultraviolet rays to form a temporarily cured resin layer. 図５は、チャンバー内に画像表示部材及び光透過性カバー部材を配置する工程を示す断面図である。FIG. 5 is a cross-sectional view showing a step of disposing the image display member and the light transmissive cover member in the chamber. 図６は、チャンバー内を真空雰囲気とした後、画像表示部材と光透過性カバー部材とを貼り合わせる工程を示す断面図である。FIG. 6 is a cross-sectional view showing a step of attaching the image display member and the light-transmissive cover member after the chamber has been evacuated. 図７は、第１、第２の貼合プレートを完全に離間させ、画像表示部材と光透過性カバー部材とに対する貼合圧力を解除する工程を示す断面図である。FIG. 7 is a cross-sectional view showing a step of completely separating the first and second bonding plates and releasing the bonding pressure to the image display member and the light transmissive cover member. 図８は、画像表示部材と光透過性カバー部材との接合体に対して、紫外線を照射することにより、仮硬化樹脂層を本硬化させる工程を示す断面図である。FIG. 8: is sectional drawing which shows the process of carrying out the main hardening of the temporary hardening resin layer by irradiating a joined body of an image display member and a transparent cover member with ultraviolet rays. 図９は、チャンバー内に画像表示部材及び光透過性カバー部材を配置する工程を示す断面図である。FIG. 9 is a cross-sectional view showing a step of disposing the image display member and the light transmissive cover member in the chamber. 図１０は、チャンバー内を真空雰囲気とした後、画像表示部材と光透過性カバー部材とを貼り合わせる工程を示す断面図である。FIG. 10 is a cross-sectional view showing a step of bonding the image display member and the light transmissive cover member after the inside of the chamber is set to a vacuum atmosphere. 図１１は、第１、第２の貼合プレートを完全に離間させ、画像表示部材と光透過性カバー部材とに対する貼合圧力を解除した後、大気開放を行う工程を示す断面図である。FIG. 11 is a cross-sectional view showing a step in which the first and second bonding plates are completely separated from each other, the bonding pressure to the image display member and the light-transmitting cover member is released, and then the atmosphere is released.

以下、本技術が適用された接合体の製造方法及び接続方法について、図面を参照しながら詳細に説明する。なお、本技術は、以下の実施形態のみに限定されるものではなく、本技術の要旨を逸脱しない範囲内において種々の変更が可能であることは勿論である。また、図面は模式的なものであり、各寸法の比率等は現実のものとは異なることがある。具体的な寸法等は以下の説明を参酌して判断すべきものである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれていることは勿論である。
[接合体の構成] Hereinafter, a manufacturing method and a connecting method of a joined body to which the present technology is applied will be described in detail with reference to the drawings. It should be noted that the present technology is not limited to the following embodiments, and various modifications can be made without departing from the gist of the present technology. Moreover, the drawings are schematic, and the ratios of the respective dimensions may differ from the actual ones. Specific dimensions should be judged in consideration of the following description. Further, it is needless to say that the drawings include portions in which dimensional relationships and ratios are different from each other.
[Structure of zygote]

以下、本技術が適用された接合体は、第１の貼合部材と第２の貼合部材とが貼合樹脂材を介して貼り合わされたものである。以下に接合体の一例として、画像表示装置１について説明する。画像表示装置１は、図１に示すように、第１の貼合部材である画像表示部材２と、第２の貼合部材である光透過性カバー部材３とが、貼合樹脂材である光硬化性樹脂組成物から形成された光透過性の硬化樹脂層４を介して積層されている。   Hereinafter, the bonded body to which the present technology is applied is one in which the first bonding member and the second bonding member are bonded via the bonding resin material. The image display device 1 will be described below as an example of the joined body. In the image display device 1, as shown in FIG. 1, an image display member 2 that is a first bonding member and a light-transmissive cover member 3 that is a second bonding member are bonding resin materials. It is laminated via a light-transmissive cured resin layer 4 formed of a photocurable resin composition.

［画像表示部材］
画像表示部材２としては、液晶表示パネル、有機ＥＬ表示パネル、プラズマ表示パネル、タッチパネル等を挙げることができる。ここで、タッチパネルとは、液晶表示パネルのような表示素子とタッチパッドのような位置入力装置を組み合わせた画像表示・入力パネルを意味する。 [Image display member]
Examples of the image display member 2 include a liquid crystal display panel, an organic EL display panel, a plasma display panel, a touch panel and the like. Here, the touch panel means an image display / input panel in which a display element such as a liquid crystal display panel and a position input device such as a touch pad are combined.

［光透過性カバー部材］
光透過性カバー部材３としては、画像表示部材に形成された画像が視認可能となるような光透過性があればよく、ガラス、アクリル樹脂、ポリエチレンテレフタレート、ポリエチレンナフタレート、ポリカーボネート等の板状材料やシート状材料が挙げられる。これらの材料には、片面又は両面ハードコート処理、反射防止処理などを施すことができる。光透過性カバー部材３の厚さや弾性などの物性は、使用目的に応じて適宜決定することができる。 [Light-transmissive cover member]
The light-transmissive cover member 3 may be any light-transmissive material that allows an image formed on the image display member to be visible, and is a plate-shaped material such as glass, acrylic resin, polyethylene terephthalate, polyethylene naphthalate, or polycarbonate. And sheet-shaped materials. These materials can be subjected to a single-sided or double-sided hard coat treatment, antireflection treatment, or the like. Physical properties such as thickness and elasticity of the light transmissive cover member 3 can be appropriately determined according to the purpose of use.

なお、光透過性カバー部材３の画像表示部側表面の周縁部には、表示画像の輝度やコントラスト向上のために遮光層５が設けられている。遮光層５は、黒色等に着色された塗料をスクリーン印刷法などで塗布し、乾燥・硬化させたものである。遮光層５の厚みとしては、通常５〜１００μｍである。   A light shielding layer 5 is provided on the peripheral portion of the surface of the light transmissive cover member 3 on the image display unit side in order to improve the brightness and contrast of the display image. The light-shielding layer 5 is formed by applying a coating material colored in black or the like by a screen printing method or the like, and drying and curing the coating material. The thickness of the light shielding layer 5 is usually 5 to 100 μm.

［貼合樹脂材］
硬化樹脂層４を構成する光硬化性樹脂組成物６は、透明で、紫外線若しくは可視光で硬化が可能な光硬化性樹脂を好適に用いることができる。光硬化性樹脂組成物６は、液晶表示装置１の透過率を低減させないように、硬化後の４００ｎｍ以上の光透過率が９０％以上であるもの選択することが望ましい。また、光硬化性樹脂組成物６は、モノマー、重合開始剤、粘度調整のためのポリマーからなる光硬化性樹脂を含有する。 [Laminating resin material]
As the photocurable resin composition 6 that constitutes the cured resin layer 4, a transparent photocurable resin that can be cured by ultraviolet rays or visible light can be preferably used. The photocurable resin composition 6 is preferably selected such that the light transmittance of 400 nm or more after curing is 90% or more so as not to reduce the transmittance of the liquid crystal display device 1. Further, the photocurable resin composition 6 contains a photocurable resin composed of a monomer, a polymerization initiator, and a polymer for adjusting the viscosity.

光硬化性樹脂組成物６は液状、ゲル状等のいずれの性状であってもよいが、好ましくは液状である。光硬化性樹脂組成物６が液状であることにより、例えば後述する画像表示装置１の製造方法において、遮光層５と光透過性カバー部材３の遮光層形成側表面とで形成される段差をより確実にキャンセルすることができる。ここで、光硬化性樹脂組成物６が液状であるとは、Ｂ型粘度計で測定した２５℃における粘度が０．０１〜１００Ｐａ・ｓを示すことが好ましい。   The photocurable resin composition 6 may be in any form such as liquid or gel, but is preferably liquid. Since the photocurable resin composition 6 is in a liquid state, for example, in a method of manufacturing the image display device 1 described later, the step formed by the light shielding layer 5 and the surface of the light transmissive cover member 3 on the light shielding layer forming side is further reduced. You can definitely cancel. Here, that the photocurable resin composition 6 is liquid means that the viscosity at 25 ° C. measured by a B-type viscometer is preferably 0.01 to 100 Pa · s.

また、硬化樹脂層４は、光硬化性樹脂組成物６がシート状に成型された光学粘着シート(OCA: Optical Clear Adhesive)により構成されてもよい。光学粘着シートは、例えば離型処理されたポリエチレンテレフテレート等の基材に光硬化性樹脂組成物６を塗布、乾燥して粘着剤層を形成し、必要に応じて架橋反応させることにより製造される。   The cured resin layer 4 may be composed of an optical adhesive sheet (OCA: Optical Clear Adhesive) formed by molding the photocurable resin composition 6 into a sheet. The optical pressure-sensitive adhesive sheet is produced, for example, by applying the photocurable resin composition 6 to a base material such as polyethylene terephthalate which has been subjected to mold release treatment, and drying it to form a pressure-sensitive adhesive layer, and a crosslinking reaction if necessary. To be done.

光硬化性樹脂組成物６の一例を説明する。本実施の形態に係る光硬化性樹脂組成物６は、光ラジカル重合性ポリ（メタ）アクリレート（成分（ａ））と、光ラジカル重合性（メタ）アクリレート（成分（ｂ））と、液状可塑剤（成分（ｃ））、又は粘着付与剤（成分（ｄ））からなる柔軟剤と、光重合開始剤（成分（ｅ））とを含有する。なお、本明細書において、（メタ）アクリレートとは、アクリル酸エステル（アクリレート）とメタクリル酸エステル（メタクリレート）とを包含する意味である。   An example of the photocurable resin composition 6 will be described. The photocurable resin composition 6 according to the present embodiment includes a photoradical-polymerizable poly (meth) acrylate (component (a)), a photoradical-polymerizable (meth) acrylate (component (b)), and a liquid plastic. It contains a softening agent consisting of an agent (component (c)) or a tackifier (component (d)), and a photopolymerization initiator (component (e)). In addition, in this specification, (meth) acrylate is meant to include an acrylic acid ester (acrylate) and a methacrylic acid ester (methacrylate).

［成分（ａ）］
光ラジカル重合性ポリ（メタ）アクリレート（成分（ａ））の好ましい具体例としては、ポリウレタン、ポリイソプレン、ポリブタジエン等を骨格に持つ（メタ）アクリレート系オリゴマーを挙げることができる。ポリウレタン骨格を持つ（メタ）アクリル系オリゴマーの好ましい具体例としては、脂肪族ウレタンアクリレート（ＥＢＥＣＲＹＬ２３０（分子量５０００）、ダイセル・サイテック社；ＵＡ−１、ライトケミカル社）等を挙げることができる。また、ポリイソプレン骨格の(メタ)アクリレートオリゴマーの好ましい具体例としては、ポリイソプレン重合体の無水マレイン酸付加物と２−ヒドロキシエチルメタクリレートとのエステル化物（ＵＣ１０２（ポリスチレン換算分子量１７０００）、（株）クラレ；ＵＣ２０３（ポリスチレン換算分子量３５０００）、（株）クラレ；ＵＣ−１（分子量約２５０００）、（株）クラレ）等を挙げることができる。 [Component (a)]
Specific preferred examples of the photo-radical-polymerizable poly (meth) acrylate (component (a)) include (meth) acrylate-based oligomers having skeletons such as polyurethane, polyisoprene and polybutadiene. Specific preferred examples of the (meth) acrylic oligomer having a polyurethane skeleton include aliphatic urethane acrylate (EBECRYL230 (molecular weight 5000), Daicel Cytec Co., Ltd .; UA-1, Light Chemical Co.) and the like. Moreover, as a preferable specific example of the (meth) acrylate oligomer having a polyisoprene skeleton, an esterified product of a maleic anhydride adduct of a polyisoprene polymer and 2-hydroxyethyl methacrylate (UC102 (polystyrene-equivalent molecular weight 17,000), (Ltd.) Kuraray; UC203 (polystyrene-equivalent molecular weight 35,000), Kuraray Co., Ltd .; UC-1 (molecular weight about 25,000), Kuraray Co., Ltd., and the like.

［成分（ｂ）］
光ラジカル重合性（メタ）アクリレート（成分（ｂ））の好ましい具体例としては、２−ヒドロキシプロピル（メタ）アクリレート、ベンジルアクリレート、ジシクロペンテニルオキシエチル（メタ）アクリレート、イソボルニル（メタ）アクリレート、オクチル（メタ）アクリレート等を挙げることができる。 [Component (b)]
Specific preferred examples of the photo-radical-polymerizable (meth) acrylate (component (b)) include 2-hydroxypropyl (meth) acrylate, benzyl acrylate, dicyclopentenyloxyethyl (meth) acrylate, isobornyl (meth) acrylate, octyl. (Meth) acrylate etc. can be mentioned.

［成分（ｃ）］
液状可塑成分（成分（ｃ））は、紫外線照射によりそれ自身は光硬化をせず、光硬化後の硬化樹脂層あるいは仮硬化樹脂層に柔軟性を与え、また硬化樹脂層間あるいは仮硬化樹脂層の硬化収縮率を低減させるものである。このような液状可塑成分としては、液状のポリブタジエン系可塑剤、ポリイソプレン系可塑剤、フタル酸エステル系可塑剤及びアジピン酸エステル系可塑剤からなる群から選択される少なくも一種を挙げることができる。 [Component (c)]
The liquid plastic component (component (c)) itself does not photo-cure by irradiation with ultraviolet rays, and imparts flexibility to the cured resin layer or the temporary-cured resin layer after the photo-curing, or the cured resin layer or the temporarily cured resin layer. It is intended to reduce the curing shrinkage rate of. Examples of such a liquid plastic component include at least one selected from the group consisting of liquid polybutadiene plasticizers, polyisoprene plasticizers, phthalate ester plasticizers and adipic ester plasticizers. ..

［成分（ｄ）］
粘着付与剤（タッキファイア）（成分（ｄ））は、成分（ｃ）と同様、光硬化後の硬化樹脂層あるいは仮硬化樹脂層に柔軟性を与えるとともに、光硬化性樹脂組成物６から形成された硬化樹脂層又は仮硬化樹脂層の初期接着強度（いわゆるタック性）を向上させる。粘着付与剤としては、例えば、テルペン樹脂、テルペンフェノール樹脂、水素添加テルペン樹脂等のテルペン系樹脂、天然ロジン、重合ロジン、ロジンエステル、水素添加ロジン等のロジン樹脂、ポリブタジエン、ポリイソプレン等の石油樹脂などを使用することができる。柔軟剤としては、成分（ｃ）又は成分（ｄ）の少なくともいずれか一方が含まれていればよい。 [Component (d)]
Like the component (c), the tackifier (tackifier) (component (d)) imparts flexibility to the cured resin layer or the temporarily cured resin layer after photocuring, and is formed from the photocurable resin composition 6. The initial adhesive strength (so-called tackiness) of the cured resin layer or temporary cured resin layer thus obtained is improved. As the tackifier, for example, terpene resin, terpene phenol resin, terpene resin such as hydrogenated terpene resin, natural rosin, polymerized rosin, rosin ester, rosin resin such as hydrogenated rosin, polybutadiene, petroleum resin such as polyisoprene Etc. can be used. The softening agent may include at least one of the component (c) and the component (d).

［成分（ｅ）］
光重合開始剤（成分（ｅ））としては、例えば、１−ヒドロキシ−シクロへキシルフェニルケトン（イルガキュア１８４、ＢＡＳＦジャパン（株））、２−ヒドロキシ−１−｛４−[４−（２一ヒドロキシ−２−メチル−プロピロニル）ベンジル]フェニル｝−２−メチル−１−プロパン−１−オン（イルガキュア１２７、ＢＡＳＦジャパン（株））、ベンゾフェノン、アセトフェノン等を挙げることができる。 [Component (e)]
Examples of the photopolymerization initiator (component (e)) include 1-hydroxy-cyclohexyl phenyl ketone (IRGACURE 184, BASF Japan Ltd.), 2-hydroxy-1- {4- [4- (21 Hydroxy-2-methyl-propionyl) benzyl] phenyl} -2-methyl-1-propan-1-one (Irgacure 127, BASF Japan Ltd.), benzophenone, acetophenone and the like can be mentioned.

光重合開始剤の添加量は、少なすぎると紫外線照射時に硬化不足となり、多すぎると開裂によるアウトガスが増え発泡不具合の傾向があるので、光ラジカル重合性ポリ（メタ）アクリレート１００質量部に対し、好ましくは０．１〜１０質量部、より好ましくは０．２〜５質量部である。   If the amount of the photopolymerization initiator added is too small, curing becomes insufficient at the time of irradiation with ultraviolet rays, and if it is too large, outgas due to cleavage increases and there is a tendency for foaming problems. It is preferably 0.1 to 10 parts by mass, more preferably 0.2 to 5 parts by mass.

なお、光硬化性樹脂組成物６には、上述した成分（ａ）〜成分（ｅ）に加えて、本発明の効果を損なわない範囲で種々の添加剤を配合することができる。例えば、硬化樹脂の分子量の調整のために連鎖移動剤、例えば、２−メルカプトエタノール、ラウリルメルカプタン、グリシジルメルカプタン、メルカプト酢酸、チオグリコール酸２−エチルヘキシル、２，３−ジメチルカプト−１−プロパノール、α−メチルスチレンダイマー等を配合することができる。その他にも、必要に応じて、シランカップリング剤等の接着改善剤、酸化防止剤、紫外線吸収剤等の添加剤を含有することができる。このような光硬化性樹脂組成物６は、上述した成分（ａ）〜成分（ｅ）と、必要に応じて添加される各種添加剤とを、公知の混合手法に従って均一に混合することにより調製することができる。これらの添加剤の添加量は、所望する物性が得られるように適宜設定することができる。なお、光硬化性樹脂組成物の市販品としては、例えば商品名「ＬＣＲ１０００−ＤＭ」「ＨＳＶＲ６００」「ＨＳＶＲ３３０」(いずれもデクセリアルズ（株))などが挙げられる。   In addition to the components (a) to (e) described above, various additives can be added to the photocurable resin composition 6 as long as the effects of the present invention are not impaired. For example, a chain transfer agent for controlling the molecular weight of the cured resin, for example, 2-mercaptoethanol, lauryl mercaptan, glycidyl mercaptan, mercaptoacetic acid, 2-ethylhexyl thioglycolate, 2,3-dimethylcapto-1-propanol, α -Methylstyrene dimer and the like can be added. In addition, if necessary, additives such as an adhesion improver such as a silane coupling agent, an antioxidant, and an ultraviolet absorber can be contained. Such a photocurable resin composition 6 is prepared by uniformly mixing the above-mentioned components (a) to (e) and various additives added as necessary according to a known mixing method. can do. The addition amount of these additives can be appropriately set so as to obtain desired physical properties. Examples of commercial products of the photocurable resin composition include trade names “LCR1000-DM”, “HSVR600”, “HSVR330” (all of Dexerials Co., Ltd.) and the like.

［接合体の製造工程］
次いで、光硬化性樹脂組成物６を用いて画像表示部材２に光透過性カバー部材３を貼り合せて画像表示装置１を製造する工程について説明する。先ず、真空雰囲気下で、第１の貼合プレート１１に支持された画像表示部材２と第２の貼合プレート１２に支持された光透過性カバー部材３とを、光硬化性樹脂組成物６を介して所定の貼合圧力で貼り合わせる。 [Manufacturing process of bonded body]
Next, a process of manufacturing the image display device 1 by bonding the light transmissive cover member 3 to the image display member 2 using the photocurable resin composition 6 will be described. First, in a vacuum atmosphere, the image display member 2 supported by the first bonding plate 11 and the light-transmissive cover member 3 supported by the second bonding plate 12 are mixed with the photocurable resin composition 6 Bond with a predetermined bonding pressure via.

具体的に、図２に示すように、片面の周縁部に形成された遮光層５を有する光透過性カバー部材３を用意し、図３に示すように、光透過性カバー部材３の遮光層５が設けられた表面３ａに、液状の光硬化性樹脂組成物６を塗布し、光硬化性樹脂層７を形成する。ここで、液状とは、Ｂ型粘度計で０．０１〜１００Ｐａ．ｓ（２５℃）の粘度を示すものである。   Specifically, as shown in FIG. 2, a light-transmitting cover member 3 having a light-shielding layer 5 formed on the peripheral portion of one surface is prepared, and as shown in FIG. 3, the light-shielding layer of the light-transmitting cover member 3 is prepared. The liquid photo-curable resin composition 6 is applied to the surface 3 a provided with 5 to form the photo-curable resin layer 7. Here, the liquid state is 0.01 to 100 Pa.s with a B type viscometer. It shows the viscosity of s (25 ° C.).

また、この塗布工程では、液状の光硬化性樹脂組成物６を遮光層５の厚さよりも厚く塗布することが好ましい。光硬化性樹脂組成物６を遮光層５の厚さよりも厚く塗布することにより、後述する貼合工程において、光透過性カバー部材３と遮光層５との間に厚み方向に段差がある場合でも、仮硬化された光硬化性樹脂組成物６の柔らかい内部が当該段差を吸収するため、貼合性を向上させることができる。なお、光硬化性樹脂組成物６の塗布は、必要な厚みが得られるように複数回行ってもよい。   In addition, in this coating step, it is preferable that the liquid photocurable resin composition 6 is coated thicker than the light shielding layer 5. Even when there is a step in the thickness direction between the light-transmissive cover member 3 and the light-shielding layer 5 in the bonding step described below, the photo-curable resin composition 6 is applied thicker than the thickness of the light-shielding layer 5. Since the soft interior of the temporarily cured photocurable resin composition 6 absorbs the step, the bondability can be improved. The photocurable resin composition 6 may be applied multiple times so as to obtain the required thickness.

次に、図４に示すように、光硬化性樹脂組成物６に対して紫外線を照射し、光硬化性樹脂組成物６を仮硬化させて仮硬化樹脂層８を形成する。これにより仮硬化樹脂層８は、表面に薄膜が形成される。仮硬化樹脂層８表面の反応率は６０〜８０％以上であることが好ましい。これにより、仮硬化樹脂層８全体の弾性率を貼り合わせ可能な低弾性率に維持しながら、次の貼合工程におけるはみ出しを抑制し、貼合性を向上させることができる。   Next, as shown in FIG. 4, the photocurable resin composition 6 is irradiated with ultraviolet rays to temporarily cure the photocurable resin composition 6 to form a temporary cured resin layer 8. As a result, a thin film is formed on the surface of the temporarily cured resin layer 8. The reaction rate on the surface of the temporarily cured resin layer 8 is preferably 60 to 80% or more. This makes it possible to suppress sticking out in the next bonding step and improve the bonding property while maintaining the elastic modulus of the entire temporarily cured resin layer 8 at a low elastic modulus capable of bonding.

次いで、図５に示すように、チャンバー１０内に画像表示部材２及び光透過性カバー部材３を配置する。チャンバー１０は、第１、第２の貼合プレート１１，１２が、図示しない昇降機構により、互いに近接離間可能に設けられている。画像表示部材２は、第１の貼合プレート１１に表示部を上向きにして支持される。また、光透過性カバー部材３は、第２の貼合プレート１２に仮硬化樹脂層８が形成された表面３ａを下側に向けて画像表示部材２の表示部と対向されて支持される。   Next, as shown in FIG. 5, the image display member 2 and the light transmissive cover member 3 are arranged in the chamber 10. In the chamber 10, the first and second bonding plates 11 and 12 are provided so as to be able to approach and separate from each other by an elevator mechanism (not shown). The image display member 2 is supported by the first bonding plate 11 with the display portion facing upward. Further, the light transmissive cover member 3 is supported so as to face the display portion of the image display member 2 with the surface 3a of the second bonding plate 12 on which the temporarily cured resin layer 8 is formed facing downward.

なお、第１、第２の貼合プレート１１，１２は、一方がメタルプレートであり、他方が粘着性を有するゴムプレートであり、メタルプレートに支持された貼合部材に対してゴムプレートに支持された貼合部材側がアライメント調整を図る。また、第１、第２の貼合プレート１１，１２は、真空吸着あるいはメカチャックにより貼合部材を支持する。その他、第１、第２の貼合プレート１１，１２は、公知の材質、支持方法を採用することができる。   One of the first and second bonding plates 11 and 12 is a metal plate, and the other is a rubber plate having adhesiveness. The rubber plate supports the bonding member supported by the metal plate. Alignment adjustment is performed on the attached bonding member side. The first and second bonding plates 11 and 12 support the bonding member by vacuum suction or a mechanical chuck. In addition, known materials and supporting methods can be adopted for the first and second bonding plates 11 and 12.

［貼合工程］
次に、チャンバー１０内の空気をポンプなどで排気し、所定の真空雰囲気とした後、図６に示すように、第１の貼合プレート１１を上昇させること等により第１、第２の貼合プレート１１，１２を近接させ、画像表示部材２と光透過性カバー部材３の仮硬化樹脂層８が形成された表面３ａとを、所定の圧力及び所定の時間だけ貼り合わせる。また、貼り合わせ温度は、適宜設定されるが、例えば１０℃〜８０℃とされる。 [Laminating process]
Next, the air in the chamber 10 is evacuated by a pump or the like to make a predetermined vacuum atmosphere, and then the first and second bonding plates 11 are raised by raising the first bonding plate 11 as shown in FIG. The mating plates 11 and 12 are brought close to each other, and the image display member 2 and the surface 3a of the light transmissive cover member 3 on which the temporarily cured resin layer 8 is formed are bonded together for a predetermined pressure and for a predetermined time. The bonding temperature is appropriately set, but is, for example, 10 ° C to 80 ° C.

仮硬化樹脂層８は、表面に薄膜が形成されているため、天地逆転した際の未硬化樹脂の流れ落ちを防ぐことができる。また、仮硬化樹脂層８上面の周縁部には、遮光層５及び表面張力による微小な凹凸が生じることがあるが、仮硬化樹脂層８の内部が液状に近い状態であるため、仮硬化樹脂層８を押し込むことができる。   Since the thin film is formed on the surface of the temporarily cured resin layer 8, it is possible to prevent the uncured resin from flowing down when the resin is turned upside down. Further, in the peripheral portion of the upper surface of the temporarily cured resin layer 8, minute irregularities due to the light shielding layer 5 and the surface tension may occur, but since the inside of the temporarily cured resin layer 8 is in a liquid-like state, The layer 8 can be pressed.

また、真空雰囲気下で画像表示部材２と光透過性カバー部材３との間に仮硬化樹脂層８を押し込むことにより、気泡の混入を防止することができる。また、仮硬化樹脂層８の押し込みにより仮硬化樹脂層８表面の薄膜が画像表示部材２表面に追従するため、気泡の発生を抑制するとともに微小な凹凸を平坦化させることができる。   Further, by pushing the temporarily cured resin layer 8 between the image display member 2 and the light transmissive cover member 3 in a vacuum atmosphere, it is possible to prevent air bubbles from entering. Further, since the thin film on the surface of the temporarily cured resin layer 8 follows the surface of the image display member 2 due to the pushing of the temporarily cured resin layer 8, it is possible to suppress the generation of bubbles and flatten the minute irregularities.

［減圧工程］
貼り合せ開始から所定時間が経過した後、第１の貼合プレート１１を下降させる等により第１、第２の貼合プレート１１，１２を若干離間させ、画像表示部材２と光透過性カバー部材３とが第１、第２の貼合プレート１１，１２に挟持された状態で貼合圧力を減じる。これにより、画像表示部材２と光透過性カバー部材３とに掛かる貼合圧力が低減される。 [Decompression process]
After a lapse of a predetermined time from the start of bonding, the first and second bonding plates 11 and 12 are slightly separated by lowering the first bonding plate 11 or the like, and the image display member 2 and the light-transmissive cover member. The bonding pressure is reduced in the state that 3 and 3 are sandwiched between the first and second bonding plates 11 and 12. Thereby, the bonding pressure applied to the image display member 2 and the light transmissive cover member 3 is reduced.

減圧の程度としては、第１、第２の貼合プレート１１，１２が画像表示部材２と光透過性カバー部材３とを挟持している状態を維持できる範囲であればよく、例えば貼合工程における所定の貼合圧力に対し５〜６０％減圧してもよい。なお、減圧の程度は、仮硬化樹脂層８の弾性率によって第１、第２の貼合プレート１１，１２の離間距離に対する減圧率は異なるため、使用する光硬化性樹脂組成物６に応じて所定の減圧率となるように第１、第２の貼合プレート１１，１２の離間距離を適宜設定する。   The degree of decompression may be within a range in which the state where the first and second bonding plates 11 and 12 sandwich the image display member 2 and the light transmissive cover member 3 can be maintained, for example, the bonding step. The pressure may be reduced by 5 to 60% with respect to the predetermined bonding pressure in. The degree of decompression depends on the elastic modulus of the temporary curing resin layer 8, and the decompression rate with respect to the distance between the first and second bonding plates 11 and 12 varies. Therefore, the degree of decompression depends on the photocurable resin composition 6 used. The separation distance between the first and second bonding plates 11 and 12 is appropriately set so as to obtain a predetermined decompression rate.

また、液状の光硬化性樹脂組成物６を用いた場合、弾性率（Ｐａ）を正確に測定することは困難であるため、減圧の程度は第１、第２の貼合プレート１１，１２の離間距離により定める。すなわち、減圧の程度としては、第１、第２の貼合プレート１１，１２が画像表示部材２と光透過性カバー部材３とを挟持している状態を維持できる範囲であり、例えば第１の貼合プレート及び第２の貼合プレートを、５〜５０μｍ離間させる。   Further, when the liquid photocurable resin composition 6 is used, it is difficult to accurately measure the elastic modulus (Pa), and therefore the degree of decompression depends on the first and second bonding plates 11 and 12. Determined by the separation distance. That is, the degree of depressurization is a range in which the first and second bonding plates 11 and 12 can maintain the state in which the image display member 2 and the light transmissive cover member 3 are sandwiched, for example, the first The bonding plate and the second bonding plate are separated by 5 to 50 μm.

［大気開放工程］
次いで、チャンバー１０内の雰囲気を大気圧にする。このとき、本技術によれば、画像表示部材２と光透過性カバー部材３とは、第１、第２の貼合プレート１１，１２によってそれぞれチャッキングされるとともに第１、第２の貼合プレート１１，１２によって挟持された状態が維持されているため、画像表示部材２と光透過性カバー部材３との貼合位置にズレが生じることを防止することができる。したがって、大気開放時間を短くすることにより、チャンバー１０内に急激な圧力変動や乱気流が発生した場合にも、画像表示部材２と光透過性カバー部材３との貼合位置ズレが防止でき、画像表示装置１の製造タクトを短縮することができる。 [Open to atmosphere]
Next, the atmosphere in the chamber 10 is brought to atmospheric pressure. At this time, according to the present technology, the image display member 2 and the light-transmissive cover member 3 are chucked by the first and second bonding plates 11 and 12, respectively, and the first and second bonding plates are bonded together. Since the state of being sandwiched by the plates 11 and 12 is maintained, it is possible to prevent the displacement of the bonding position between the image display member 2 and the light transmissive cover member 3. Therefore, by shortening the atmospheric opening time, it is possible to prevent the bonding position of the image display member 2 and the light transmissive cover member 3 from being misaligned even when a sudden pressure fluctuation or turbulent airflow occurs in the chamber 10. The manufacturing tact of the display device 1 can be shortened.

［貼合圧力の解除工程］
次いで、図７に示すように、第２の貼合プレート１２による光透過性カバー部材３のチャッキングを解除するとともに第１の貼合プレート１１をさらに下降させる等により第１、第２の貼合プレート１１，１２を完全に離間させ、画像表示部材２と光透過性カバー部材３とに対する貼合圧力を解除する。 [Laminating pressure release process]
Then, as shown in FIG. 7, the chucking of the light-transmissive cover member 3 by the second bonding plate 12 is released, and the first bonding plate 11 is further lowered. The bonding plates 11 and 12 are completely separated from each other, and the bonding pressure on the image display member 2 and the light transmissive cover member 3 is released.

［本硬化工程］
その後、図８に示すように、画像表示部材２と光透過性カバー部材３との接合体に対して、さらに紫外線を照射することにより、仮硬化樹脂層８を本硬化させる。これにより、画像表示部材２と光透過性カバー部材３とを光透過性の硬化樹脂層４を介して接合させた画像表示装置１（図１）を得る。さらに必要に応じて、光透過性カバー部材３の遮光層５と画像表示部材２との間の仮硬化樹脂層８に紫外線を照射し、仮硬化樹脂層８を本硬化させてもよい。 [Main curing step]
Thereafter, as shown in FIG. 8, the provisionally cured resin layer 8 is fully cured by further irradiating the joined body of the image display member 2 and the light transmissive cover member 3 with ultraviolet rays. As a result, the image display device 1 (FIG. 1) in which the image display member 2 and the light-transmissive cover member 3 are joined together via the light-transmissive cured resin layer 4 is obtained. Further, if necessary, the provisionally-cured resin layer 8 between the light-shielding layer 5 of the light-transmitting cover member 3 and the image display member 2 may be irradiated with ultraviolet rays to fully cure the provisionally-cured resin layer 8.

なお、本硬化工程において、光硬化性樹脂組成物６の反応率は、９０％以上であることが好ましく、９５％以上であることがより好ましい。光硬化性樹脂組成物６を十分に硬化させることにより、光透過性カバー部材３と画像表示部材２との接着力を向上させることができる。   In the main curing step, the reaction rate of the photocurable resin composition 6 is preferably 90% or higher, more preferably 95% or higher. By sufficiently curing the photocurable resin composition 6, the adhesive force between the light transmissive cover member 3 and the image display member 2 can be improved.

［本技術の効果］
本技術が適用された接合体の製造工程によれば、画像表示部材２と光透過性カバー部材３とが第１、第２の貼合プレート１１，１２に挟持された状態で貼合圧力を減じ、この状態で大気開放を行う。したがって、光透過性樹脂組成物６が液状やゲル状であった場合でも光透過性カバー部材３と画像表示部材２との貼合位置ズレを防止することができる。 [Effect of this technology]
According to the manufacturing process of the joined body to which the present technology is applied, the bonding pressure is applied in a state where the image display member 2 and the light-transmissive cover member 3 are sandwiched between the first and second bonding plates 11 and 12. Then, open the atmosphere in this state. Therefore, even when the light transmissive resin composition 6 is in a liquid or gel state, it is possible to prevent the misalignment of the light transmissive cover member 3 and the image display member 2 from being attached.

また、光透過性カバー部材３と画像表示部材２とが第１、第２の貼合プレート１１，１２に挟持されているため、大気開放時間を短縮しチャンバー１０内の急激な圧力変動や乱気流が生じた場合にも貼合位置ズレが防止されることから、製造タクトの短縮化を図ることができる。   Further, since the light-transmissive cover member 3 and the image display member 2 are sandwiched between the first and second bonding plates 11 and 12, the atmospheric opening time is shortened, and rapid pressure fluctuations and turbulence in the chamber 10 occur. Even if a problem occurs, the bonding position shift is prevented, so that the manufacturing tact can be shortened.

さらに、画像表示部材２と光透過性カバー部材３との貼合圧力を減圧した状態で大気開放を行うため、大気開放が終了するまで第１、第２の貼合プレート１１，１２に挟持させていても、画像表示部材２と光透過性カバー部材３とに貼合圧力が過剰に掛かることがない。したがって、本技術が適用された製造工程により製造された画像表示装置１は、硬化樹脂層４に残存応力が局所的に介在することがなく、硬化樹脂層４の応力ムラに起因する色ムラの発生を防止することができる。また、薄型化が進展している画像表示部材２や光透過性カバー部材３に対する負荷も低減でき、反りや損傷を防止することができる。   Further, since the air is released to the atmosphere while the pressure for bonding the image display member 2 and the light-transmissive cover member 3 is reduced, the first and second bonding plates 11 and 12 are clamped until the atmosphere is released. However, the bonding pressure is not excessively applied to the image display member 2 and the light transmissive cover member 3. Therefore, in the image display device 1 manufactured by the manufacturing process to which the present technology is applied, residual stress is not locally present in the cured resin layer 4, and color unevenness caused by stress unevenness in the cured resin layer 4 is prevented. Occurrence can be prevented. Further, it is possible to reduce the load on the image display member 2 and the light-transmitting cover member 3 which are becoming thinner, and it is possible to prevent warping and damage.

なお、上記では、光透過性カバー部材３に光硬化性樹脂組成物６を塗布し、仮硬化させた後、天地を逆転して第２の貼合プレート１２に支持させたが、第１の貼合プレートに支持された画像表示部材２又は光透過性カバー部材３に液状の光硬化性樹脂組成物６を塗布し、仮硬化させずに貼り合せ、その後、光硬化させてもよい。   In the above description, the light-curable resin composition 6 was applied to the light-transmissive cover member 3 and temporarily cured, and then the material was turned upside down to be supported by the second bonding plate 12. The liquid photocurable resin composition 6 may be applied to the image display member 2 or the light transmissive cover member 3 supported by the laminating plate, and the liquid photocurable resin composition 6 may be laminated without temporary curing, and then photocured.

また、液状又はゲル状の光硬化性樹脂組成物６を用いる他、光硬化性樹脂組成物６がシート状に成型された光学粘着シートを用いてもよい。光学粘着シートは、成型過程でタック性を備え、画像表示部材２と光透過性カバー部材３との貼合位置は保持できるが、本技術が適用された接合体の製造工程に適用すれば、画像表示部材２及び光透過性カバー部材３を第１、第２の貼合プレート１１，１２間に挟持させた状態で貼合圧力を減じて大気開放を行うことにより、貼合位置ズレを確実に防止できるとともに、画像表示部材２及び光透過性カバー部材３に対して貼合圧力が過剰に掛かることを防止することができる。   Further, in addition to using the liquid or gel photocurable resin composition 6, an optical adhesive sheet in which the photocurable resin composition 6 is molded into a sheet may be used. The optical pressure-sensitive adhesive sheet has tackiness during the molding process and can hold the bonding position between the image display member 2 and the light-transmissive cover member 3, but if applied to the manufacturing process of the joined body to which the present technology is applied, The bonding position is surely deviated by reducing the bonding pressure and opening to the atmosphere with the image display member 2 and the light transmissive cover member 3 being sandwiched between the first and second bonding plates 11 and 12. In addition, it is possible to prevent the bonding pressure from being excessively applied to the image display member 2 and the light transmissive cover member 3.

次いで、本技術の実施例について説明する。本実施例では、液晶表示パネルとカバーガラスとを光硬化性樹脂組成物を介して真空雰囲気下で接続し、大気開放した後のズレ量を測定した。カバーガラスは、厚さ０．７ｍｍ、５ｉｎｃｈサイズのものを使用した。また、各実施例及び比較例に係る液晶表示パネルとカバーガラスとの接続体のサンプル数は１０個とした。   Next, examples of the present technology will be described. In this example, the liquid crystal display panel and the cover glass were connected via a photocurable resin composition in a vacuum atmosphere, and the amount of deviation after opening to the atmosphere was measured. The cover glass used had a thickness of 0.7 mm and a size of 5 inches. Further, the number of samples of the connected body of the liquid crystal display panel and the cover glass according to each of the examples and the comparative examples was set to 10.

［実施例１］
実施例１では、貼合樹脂材として液状の光学弾性樹脂（ＬＣＲ１０００−ＤＭ、液粘度４２００ｍＰａ・ｓｅｃ；デクセリアルズ株式会社製）を使用した。この液状の光学弾性樹脂をカバーガラスに塗布し、チャンバー内において真空雰囲気下で機械的にカバーガラスとのギャップ及び樹脂厚を制御しながら液晶表示パネルを載置して貼り合せた。光学弾性樹脂の塗布厚みは１００μｍ、チャンバー内の真空度は５０Ｐａとした。 [Example 1]
In Example 1, a liquid optical elastic resin (LCR1000-DM, liquid viscosity 4200 mPa · sec; manufactured by Dexerials Co., Ltd.) was used as the bonding resin material. This liquid optically elastic resin was applied to a cover glass, and a liquid crystal display panel was placed and bonded together while mechanically controlling the gap with the cover glass and the resin thickness in a vacuum atmosphere in a chamber. The coating thickness of the optical elastic resin was 100 μm, and the degree of vacuum in the chamber was 50 Pa.

貼り合せ後、液晶表示パネルを支持する貼合プレートとカバーガラスを支持する貼合プレートと間の距離を５μｍ離間させ、光学弾性樹脂を介して貼り合わされた液晶表示パネルとカバーガラスとが一対の貼合プレート間に挟持された状態で貼合圧力を減じ、この状態で大気開放を行った。大気開放時間は１秒とした。   After the bonding, the distance between the bonding plate supporting the liquid crystal display panel and the bonding plate supporting the cover glass is set to 5 μm, and the liquid crystal display panel and the cover glass bonded together via the optical elastic resin form a pair. The laminating pressure was reduced while being sandwiched between the laminating plates, and the atmosphere was opened in this state. The atmospheric opening time was 1 second.

大気開放後に、貼合プレートによる液晶表示パネル及びカバーガラスの支持を解除するとともに、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除し、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、ズレは生じなかった。   After opening to the atmosphere, the supporting of the liquid crystal display panel and the cover glass by the bonding plate is released, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released by separating the pair of bonding plates. When the positional deviation amount between the liquid crystal display panel and the cover glass was measured, no deviation occurred.

［実施例２］
実施例２では、貼合樹脂材として液状の光学弾性樹脂（ＨＳＶＲ３３０；デクセリアルズ株式会社製）を使用した。この液状の光学弾性樹脂をカバーガラスに塗布し、紫外線を照射することにより仮硬化させ、仮硬化樹脂層を形成した。次いで、チャンバー内において真空雰囲気下で液晶表示パネルと貼り合せた。光学弾性樹脂の塗布厚みは１００μｍ、仮硬化樹脂層の弾性率は１．６０Ｅ＋４（Ｐａ）、チャンバー内の真空度は５０Ｐａ、貼り合せの推力は５００Ｎとした。 [Example 2]
In Example 2, a liquid optical elastic resin (HSVR330; manufactured by Dexerials Co., Ltd.) was used as the bonding resin material. This liquid optical elastic resin was applied to a cover glass and was temporarily cured by irradiating with ultraviolet rays to form a temporarily cured resin layer. Then, it was attached to a liquid crystal display panel in a chamber under a vacuum atmosphere. The coating thickness of the optical elastic resin was 100 μm, the elastic modulus of the temporarily cured resin layer was 1.60E + 4 (Pa), the degree of vacuum in the chamber was 50 Pa, and the thrust of bonding was 500 N.

貼り合せ後、液晶表示パネルを支持する貼合プレートとカバーガラスを支持する貼合プレートと間の距離を離間させ、液晶表示パネルとカバーガラスとが一対の貼合プレート間に挟持された状態で貼合圧力を３０％減じ、この状態で大気開放を行った。大気開放時間は１秒とした。   After bonding, the bonding plate supporting the liquid crystal display panel and the bonding plate supporting the cover glass are separated from each other with the liquid crystal display panel and the cover glass sandwiched between the pair of bonding plates. The bonding pressure was reduced by 30%, and the atmosphere was opened in this state. The atmospheric opening time was 1 second.

大気開放後に、貼合プレートによる液晶表示パネル及びカバーガラスの支持を解除するとともに、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除し、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、ズレは生じなかった。   After opening to the atmosphere, the supporting of the liquid crystal display panel and the cover glass by the bonding plate is released, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released by separating the pair of bonding plates. When the positional deviation amount between the liquid crystal display panel and the cover glass was measured, no deviation occurred.

［実施例３］
実施例３では、貼合樹脂材として液状の光学弾性樹脂（ＨＳＶＲ６００；デクセリアルズ株式会社製）を使用した。この液状の光学弾性樹脂をカバーガラスに塗布し、紫外線を照射することにより仮硬化させ、仮硬化樹脂層を形成した。次いで、チャンバー内において真空雰囲気下で液晶表示パネルと貼り合せた。光学弾性樹脂の塗布厚みは１００μｍ、仮硬化樹脂層の弾性率は５．１０Ｅ＋４（Ｐａ）、チャンバー内の真空度は５０Ｐａ、貼り合せの推力は５００Ｎとした。 [Example 3]
In Example 3, a liquid optical elastic resin (HSVR600; manufactured by Dexerials Co., Ltd.) was used as the bonding resin material. This liquid optical elastic resin was applied to a cover glass and was temporarily cured by irradiating with ultraviolet rays to form a temporarily cured resin layer. Then, it was attached to a liquid crystal display panel in a chamber under a vacuum atmosphere. The coating thickness of the optical elastic resin was 100 μm, the elastic modulus of the temporarily cured resin layer was 5.10E + 4 (Pa), the degree of vacuum in the chamber was 50 Pa, and the thrust of bonding was 500 N.

貼り合せ後、液晶表示パネルを支持する貼合プレートとカバーガラスを支持する貼合プレートと間の距離を離間させ、液晶表示パネルとカバーガラスとが一対の貼合プレート間に挟持された状態で貼合圧力を３０％減じ、この状態で大気開放を行った。大気開放時間は１秒とした。   After bonding, the bonding plate supporting the liquid crystal display panel and the bonding plate supporting the cover glass are separated from each other with the liquid crystal display panel and the cover glass sandwiched between the pair of bonding plates. The bonding pressure was reduced by 30%, and the atmosphere was opened in this state. The atmospheric opening time was 1 second.

大気開放後に、貼合プレートによる液晶表示パネル及びカバーガラスの支持を解除するとともに、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除し、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、ズレは生じなかった。   After opening to the atmosphere, the supporting of the liquid crystal display panel and the cover glass by the bonding plate is released, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released by separating the pair of bonding plates, When the positional deviation amount between the liquid crystal display panel and the cover glass was measured, no deviation occurred.

［比較例１］
比較例１では、貼り合せ後、貼合プレートによるカバーガラスの支持を解除し、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除した後に大気開放を行った。その他の条件は実施例１と同じである。 [Comparative Example 1]
In Comparative Example 1, after the bonding, the support of the cover glass by the bonding plate is released, the pair of bonding plates are separated, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released. The atmosphere was released. Other conditions are the same as in Example 1.

比較例１では、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、０．５〜３ｍｍのズレが生じた。   In Comparative Example 1, when the positional deviation amount between the liquid crystal display panel and the cover glass was measured, a deviation of 0.5 to 3 mm occurred.

［比較例２］
比較例２では、貼り合せ後、貼合プレートによるカバーガラスの支持を解除し、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除した後に大気開放を行った。その他の条件は実施例２と同じである。 [Comparative example 2]
In Comparative Example 2, after the bonding, the support of the cover glass by the bonding plate is released, the pair of bonding plates are separated, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released. The atmosphere was released. The other conditions are the same as in Example 2.

比較例２では、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、０．０３〜０．３ｍｍのズレが生じた。   In Comparative Example 2, when the positional shift amount between the liquid crystal display panel and the cover glass was measured, a shift of 0.03 to 0.3 mm occurred.

［比較例３］
比較例３では、貼り合せ後、貼合プレートによるカバーガラスの支持を解除し、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除した後に大気開放を行った。その他の条件は実施例３と同じである。 [Comparative Example 3]
In Comparative Example 3, after the bonding, the support of the cover glass by the bonding plate is released, the pair of bonding plates are separated, and the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass is completely released. The atmosphere was released. The other conditions are the same as in Example 3.

比較例３では、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、０．０３〜０．１ｍｍのズレが生じた。   In Comparative Example 3, when the positional shift amount between the liquid crystal display panel and the cover glass was measured, a shift of 0.03 to 0.1 mm occurred.

［比較例４］
比較例４では、貼り合せ後、大気開放が終了するまで液晶表示パネル及びカバーガラスの接合体に貼合圧力を掛け続け、その後貼合プレートによる液晶表示パネル及びカバーガラスの支持を解除するとともに、一対の貼合プレートを離間させて液晶表示パネル及びカバーガラスの接合体に掛かる貼合圧力を完全に解除した。その他の条件は実施例２と同じである。 [Comparative Example 4]
In Comparative Example 4, after bonding, the bonding pressure of the liquid crystal display panel and the cover glass is continuously applied to the bonded body of the liquid crystal display panel and the cover glass until the release to the atmosphere is finished, and thereafter, the support of the liquid crystal display panel and the cover glass by the bonding plate is released, The pair of bonding plates were separated from each other to completely release the bonding pressure applied to the bonded body of the liquid crystal display panel and the cover glass. The other conditions are the same as in Example 2.

比較例４では、液晶表示パネルとカバーガラスとの位置ズレ量を測定したところ、ズレは生じなかったが、接合体に反りが生じた。   In Comparative Example 4, when the positional deviation amount between the liquid crystal display panel and the cover glass was measured, no deviation occurred, but the bonded body warped.

Figure 0006692709
Figure 0006692709

表１に示すように、実施例１〜３では、液晶表示パネルとカバーガラスとが一対の貼合プレート間に挟持された状態で貼合圧力を減じ、この状態で大気開放を行っているため、１秒という短時間で大気開放を行い、チャンバー内に急激な圧力変動や乱気流が発生したにも関わらず、液晶表示パネルとカバーガラスとの貼合位置ズレを防止することができた。   As shown in Table 1, in Examples 1 to 3, the bonding pressure was reduced in a state where the liquid crystal display panel and the cover glass were sandwiched between the pair of bonding plates, and the atmosphere was opened in this state. It was possible to prevent displacement of the bonding position between the liquid crystal display panel and the cover glass in spite of sudden pressure fluctuation and turbulent air flow in the chamber by opening to the atmosphere in a short time of 1 second.

また、大気開放に先立って貼合圧力を減じていることから、大気開放後に貼合圧力を解除しても、接合体に反りが生じることなく、液晶表示パネルやカバーガラスに損傷を与える恐れもない。   In addition, since the bonding pressure is reduced prior to opening to the atmosphere, even if the bonding pressure is released after opening to the atmosphere, the bonded body will not warp and the liquid crystal display panel and cover glass may be damaged. Absent.

一方、比較例１〜３は、液晶表示パネル及びカバーガラスに対する貼合圧力を解除した後に大気開放を行ったため、短時間の大気開放によって生じたチャンバー内の急激な圧力変動や乱気流により、液晶表示パネルとカバーガラスとの貼合位置ズレが生じた。比較例１では、液状の光学弾性樹脂を介在させていたため、光学弾性樹脂を仮硬化させた比較例２、比較例３と比べて位置ズレ量が大きくなった。   On the other hand, in Comparative Examples 1 to 3, since the bonding pressure to the liquid crystal display panel and the cover glass was released and then the atmosphere was opened, the liquid crystal display was caused by the rapid pressure fluctuation and turbulence in the chamber caused by the short time atmosphere opening. The bonding position of the panel and the cover glass was misaligned. In Comparative Example 1, since the liquid optical elastic resin was interposed, the positional deviation amount was larger than in Comparative Examples 2 and 3 in which the optical elastic resin was temporarily cured.

また、比較例４は、貼り合せから大気開放が終了するまで液晶表示パネル及びカバーガラスに貼合圧力を掛けていたため、大気開放による位置ズレは防止できたが、液晶表示パネル及びカバーガラスに貼合圧力が過剰に掛かり、反りが発生した。   Further, in Comparative Example 4, since the bonding pressure was applied to the liquid crystal display panel and the cover glass from the bonding to the end of opening to the atmosphere, displacement due to opening to the atmosphere could be prevented, but bonding to the liquid crystal display panel and the cover glass was prevented. The combined pressure was excessive and warpage occurred.

１ 画像表示装置、２ 画像表示部材、３ 光透過性カバー部材、４ 硬化樹脂層、５ 遮光層、６ 光硬化性樹脂組成物、７ 光硬化性樹脂層、８ 仮硬化樹脂層、１０ チャンバー、１１ 第１の貼合プレート、１２ 第２の貼合プレート DESCRIPTION OF SYMBOLS 1 image display device, 2 image display member, 3 light transmissive cover member, 4 curable resin layer, 5 light shielding layer, 6 photocurable resin composition, 7 photocurable resin layer, 8 temporary curable resin layer, 10 chamber, 11 first bonding plate, 12 second bonding plate

Claims (7)

真空雰囲気下で、第１の貼合プレートに支持された第１の貼合部材と第２の貼合プレートに支持された第２の貼合部材とを、貼合樹脂材を介して所定の貼合圧力で貼り合わせる工程と、
次いで、上記第１、第２の貼合部材が上記第１、第２の貼合プレートに挟持された状態で上記第１、第２の貼合プレートを離間させて、上記貼合圧力を減じる工程と、
次いで、真空雰囲気下から大気圧へ開放する工程と、
次いで、上記第１、第２の貼合部材に対する貼合圧力を解除する工程とを有する接合体の製造方法。 Under a vacuum atmosphere, the first bonding member supported by the first bonding plate and the second bonding member supported by the second bonding plate are separated by a predetermined amount through a bonding resin material. The process of bonding with bonding pressure,
Next, the first and second bonding members are separated from each other while the first and second bonding members are sandwiched between the first and second bonding plates to reduce the bonding pressure. Process,
Then, a step of opening from a vacuum atmosphere to atmospheric pressure,
Next, a method of manufacturing a joined body, including a step of releasing the bonding pressure applied to the first and second bonding members. 上記第１の貼合部材及び第２の貼合部材が、それぞれ画像表示部材及び光透過性カバー部材であり、上記貼合樹脂材が上記第２の貼合部材に全面的に塗布されている請求項１に記載の接合体の製造方法。   The first bonding member and the second bonding member are an image display member and a light-transmitting cover member, respectively, and the bonding resin material is entirely applied to the second bonding member. The method for manufacturing the joined body according to claim 1. 上記貼合樹脂材は、仮硬化されており、
上記第１、第２の貼合部材に対する貼合圧力を減じる工程において、所定の上記貼合圧力に対し５〜６０％減じる請求項１又は２に記載の接合体の製造方法。 The above-mentioned laminated resin material is provisionally cured,
The method for manufacturing a joined body according to claim 1, wherein in the step of reducing the bonding pressure to the first and second bonding members, the bonded pressure is reduced by 5 to 60% with respect to the predetermined bonding pressure. 上記貼合樹脂材は、液状であり、
上記第１、第２の貼合部材に対する貼合圧力を減じる工程において、上記第１の貼合プレート及び上記第２の貼合プレートを、５〜５０μｍ離間させる請求項１〜３のいずれか１項に記載の接合体の製造方法。 The above-mentioned laminated resin material is liquid,
The step of reducing the bonding pressure to the first and second bonding members, wherein the first bonding plate and the second bonding plate are separated by 5 to 50 μm. A method for manufacturing a joined body according to item. 上記第１、第２の貼合部材を貼り合せた後、上記貼合樹脂材を硬化させる工程を有する請求項１〜４のいずれか１項に記載の接合体の製造方法。   The manufacturing method of the joined body according to any one of claims 1 to 4, which has a step of curing the bonding resin material after bonding the first and second bonding members. 上記貼合樹脂材は、フィルム状に成型されている請求項１に記載の接合体の製造方法。   The method for manufacturing a joined body according to claim 1, wherein the bonded resin material is formed into a film shape. 真空雰囲気下で、第１の貼合プレートに支持された第１の貼合部材と第２の貼合プレートに支持された第２の貼合部材とを、貼合樹脂材を介して所定の貼合圧力で貼り合わせる工程と、
次いで、上記第１、第２の貼合部材が上記第１、第２の貼合プレートに挟持された状態で上記第１、第２の貼合プレートを離間させて、貼合圧力を減じる工程と、
次いで、真空雰囲気下から大気圧へ開放する工程と、
次いで、上記第１、第２の貼合部材に対する貼合圧力を解除する工程とを有する接続方法。 Under a vacuum atmosphere, the first bonding member supported by the first bonding plate and the second bonding member supported by the second bonding plate are separated by a predetermined amount through a bonding resin material. The process of bonding with bonding pressure,
Next, a step of separating the first and second bonding plates in a state where the first and second bonding members are sandwiched between the first and second bonding plates to reduce the bonding pressure. When,
Then, a step of opening from a vacuum atmosphere to atmospheric pressure,
Then, a step of releasing the bonding pressure to the first and second bonding members, the connection method.
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