JP3326402B2 - Optical connection parts - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical device, an optical circuit package, and an optical connection device for interconnecting optical devices, components, and devices used for optical communication and optical information processing such as optical circuit devices. Optical wiring board).

[0002]

2. Description of the Related Art Generally, in connection of a plurality of optical elements in an optical circuit package, between a plurality of optical circuit packages, or in optical connection of an optical circuit device on which the optical circuit package is mounted, an optical element or an optical circuit package is generally used. An optical connector is arranged at an end of an optical circuit device or the like and is connected to each other by an optical fiber. In this case, since the optical fibers need to be arranged with an extra length, for example, on the optical circuit package or inside and / or the back of the optical circuit device, complicated wiring by the optical fibers is formed in a bird's nest, Or at present, they are congested and occupy a large space. For an optical connection method that requires a great deal of space and connection labor for such complicated wiring, an optical fiber is arbitrarily wired on a two-dimensional plane to solve these problems easily. A method has been proposed. For example, as disclosed in Japanese Patent No. 2574611, there has been proposed an optical connecting part that uses a sheet or substrate coated with an adhesive and fixes an optical fiber thereby.

[0003] By the way, the optical connection component described in Japanese Patent No. 2574611 is manufactured by laying an optical fiber with an adhesive on a base material (base layer) or a fiber jacket to form a wiring pattern. Above,
An optical connection component is obtained by forming a protective layer by coating using a material similar to the material used for the base material. However, according to this method, as the number of laid optical fibers increases and the overlapping portion (crossover wiring) of the optical fibers in the formed wiring pattern increases, the thickness of the optical fiber wiring layer increases, and In the overlapping part of the optical fiber,
There is a problem that the protective layer cannot be provided uniformly because the number of adhesive surfaces in contact with the optical fiber is reduced. Further, there is a problem that the fixing force of the adhesive is weakened in the overlapping portion of the optical fibers in the wiring pattern, the optical fiber moves, and the optical fiber in the wiring pattern is displaced (the wiring pattern is broken). Furthermore, a typical optical fiber has a diameter of 125 to 25.
0 μm, for example, 375 to 7 at three overlapping portions.
When the thickness becomes 50 μm and the overlapping portion of the optical fiber in the wiring pattern increases, a floating portion (air layer) of the protective layer is generated around the optical fiber below the protective layer, and there is a problem in reliability with respect to temperature and humidity. In addition to this, the optical wiring board is significantly weakened against breakage due to deformation such as bending.

In order to solve these problems, a resin protective layer is formed on an optical fiber wired on an adhesive layer to fix the congested optical fiber, thereby reducing stress and heat resistance. -Use a silicone-based material commonly used as a sealing material in the semiconductor industry, etc. for the resin protective layer in order to provide reliability such as cold resistance, moisture resistance, chemical resistance, dustproofness, and electrical insulation. That is being considered. Even in this case, there is a demand for an optical connection component having higher reliability such as higher heat resistance, higher cold resistance, and higher adhesion to a resin protective layer.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems in the prior art. That is, an object of the present invention is to provide an external force (pulling, bending, scratching, etc.) for a wired optical fiber to an optical fiber wiring congested as described above without breaking the wiring pattern of the wired optical fiber. To provide a novel optical connection component that can be fixed, protected, easily optically connected, and has excellent reliability such as environmental resistance such as heat resistance and cold resistance and high adhesion to a resin protective layer. It is in.

[0006]

According to a first aspect of the present invention, there is provided an optical connecting part comprising a plurality of optical fibers which are wired two-dimensionally and have an end portion for optically connecting to an end, and the optical fiber. It has at least one resin protective layer for fixing the optical fiber, and the resin protective layer is made of a silicone-based material, and is bonded to a base material or another resin protective layer via an adhesive layer. The adhesive layer is made of a silicone-based pressure-sensitive adhesive that is crosslinked and cured by a hydrosilylation reaction.

In the optical connecting part of the present invention, the resin protective layer for fixing the optical fiber includes an adhesive layer made of a silicone-based adhesive which is crosslinked and cured by a hydrosilylation reaction on both surfaces of the substrate. It may be joined via a via. Further, another resin protective layer may be provided on the back surface of the base material. Also, when a resin protective layer is provided on the back surface of the substrate in order to make the optical connection component flexible without fixing the optical fiber, the resin protective layer is directly applied to the substrate without an adhesive layer. It can also be provided on top. further,
A plurality of resin protective layers fixing the optical fiber may be joined via an adhesive layer made of a silicone-based pressure-sensitive adhesive that is crosslinked and cured by a hydrosilylation reaction.

In a second optical connection component of the present invention, the plurality of optical connection components are bonded via an adhesive layer made of a silicone-based adhesive which is crosslinked and cured by a hydrosilylation reaction. It is a laminate formed.

A first optical connection component of the present invention is a silicone-based pressure-sensitive adhesive (hereinafter, referred to as an “addition-type silicone-based pressure-sensitive adhesive”) that is crosslinked and cured by a hydrosilylation reaction on one surface of a substrate having a two-dimensional plane. ) Is applied to form an adhesive layer, and then a plurality of optical fibers are wired thereon so as to have an end portion for optical connection to an end of the optical fiber. It can be manufactured by forming a resin protective layer made of a silicone-based material so as to be fixed. The resin protective layer may be formed by filling the inside of a weir-like material provided on or near the periphery of the base material or another resin protective layer with a silicone-based material. Further, a resin protective layer may be formed on the other surface of the base material by applying the same or different material for forming a flexible film. Alternatively, an adhesive layer made of the above-mentioned additional silicone-based pressure-sensitive adhesive may be formed on both surfaces of the base material, and wiring of an optical fiber and a resin protective layer may be formed.

[0010] An optical connecting part having no base material can be produced by using a peelable film.
That is, on one surface of the peelable film, an adhesive layer made of an addition-type silicone-based adhesive is formed as described above,
After wiring an optical fiber and forming a resin protective layer made of a silicone-based material, the release film may be removed, and the resin protective layer may be formed on the exposed adhesive layer. Alternatively, an optical fiber may be wired on the exposed adhesive layer as described above to form a resin protective layer made of a silicone-based material. Further, on the formed resin protective layer, similarly, an adhesive layer made of an addition-type silicone-based adhesive may be formed, an optical fiber may be wired, and a resin protective layer made of a silicone-based material may be formed. . By repeating this operation, it is possible to produce an optical connection component in which a large number of resin protective layers to which the optical fibers are fixed are joined via an adhesive layer.

An optical connection component having a plurality of base materials is the same as the optical connection component having one base material manufactured as described above, and the resin protective layers thereof are formed using an addition type silicone adhesive. It can also be manufactured by sticking together to form a laminate.

[0012]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a partially broken plan view of an example of the optical connection component of the present invention, and FIG. 2 is a cross-sectional view thereof. FIG. 3 to FIG. 7 are cross-sectional views of other examples when a base material is used, respectively. FIG. 6 is a cross-sectional view of an example of the optical connection component in which the base material exists on both surfaces of the protective layer. 8 to 10 are cross-sectional views of an example of the optical connection component having no base material.

In FIGS. 1 and 2, a plurality of optical fibers 4 are two-dimensionally wired on one surface of a base material 1 having a two-dimensional plane via an adhesive layer 3. It is fixed by a flexible resin protective layer 2. An end of the optical fiber 4 is a terminal portion 5 for optical connection, and an optical component 6, for example, an optical connector is connected. Note that the terminal portion 5 and the optical component 6 may be integrated. Reference numeral 7 denotes a weir-like material provided for forming a resin protective layer.

The optical connection component shown in FIG. 3 is provided with a flexible resin protective layer 2a made of the same material or a different material as the resin material of the resin protective layer on the other surface of the substrate 1 of FIG. This shows a case where it is formed. In FIG. 4, a plurality of optical fibers 4 'are two-dimensionally wired on the other surface of the base material 1 of FIG. 2 via another adhesive layer 3' as in the case of FIG. The optical fibers 4 'are fixed by a flexible resin protective layer 2'. FIG.
The optical connection parts of the optical connection parts 8 and 8 of FIG.
It has a structure joined by the adhesive layer 3a,
A laminated structure having one resin protective layer and two substrates is formed. The optical connection component shown in FIG.
The case where the base material 1 on which the optical fiber is wired via the adhesive layer 3 is provided and formed is shown above. Further FIG.
6 shows a case where the resin protective layer 2a is provided on the other surface of the base material 1 in FIG.

The optical connecting part shown in FIG. 8 has a structure in which a resin protective layer 2 for fixing an optical fiber is joined to another resin protective layer 2 a via an adhesive layer 3. Also,
FIG. 9 shows a structure in which the resin protective layer 2 fixing the optical fiber 4 and the resin protective layer 2 ′ fixing the optical fiber 4 ′ are bonded via the adhesive layer 3. , FIG.
In the case of 0, the optical fiber 4 ″ is added to the optical connecting part 8 in FIG.
Are fixed to each other via an adhesive layer 3a, thereby forming a laminate composed of three resin protective layers.

In the optical connecting part of the present invention, a flexible film-like substrate having a two-dimensional plane is generally used as a substrate for supporting the wired optical fiber, but it is not particularly limited. It is not something to be done. Examples of the base material include a glass-epoxy resin composite substrate, a polyester film, a polyimide film, a gel material, a rubber material, and a foam material of an organic material such as silicone or polyurethane. Any substrate can be used as long as it is used for electric components. Further, the optical connecting component of the present invention does not need to be flexible depending on the purpose of use, and may be rigid. For example, a substrate made of a rigid polymer material, a ceramic substrate, or the like can be used, and its shape may be any. In particular, from the viewpoint of heat resistance, a substrate having good heat resistance such as a glass-epoxy resin composite substrate, a polyimide film, silicone or urethane foam or rubber, or a ceramic substrate is preferable.

The optical fiber to be wired in the present invention is appropriately selected and used according to the application purpose of the optical connecting part. For example, a single mode optical fiber or a multi-mode optical fiber made of quartz or plastic is preferably used. You. Preferably, the optical fiber is a carbon-coated optical fiber. In general, the major factors that determine the life of an optical fiber are the intrusion of water and hydrogen in the atmosphere.However, the carbon-coated optical fiber suppresses the intrusion of water and hydrogen, resulting in high reliability and long life. is there.

As the method of two-dimensionally wiring an optical fiber in the present invention, a method of providing an adhesive layer on a base material and wiring the simplest is the simplest method. In this case, a release film may be used temporarily as a base material, or a material in which an adhesive layer is provided on a flexible resin protective layer may be used.

As the adhesive constituting the adhesive layer for wiring the optical fiber, a silicone-based pressure-sensitive adhesive (addition type silicone-based pressure-sensitive adhesive) that causes crosslinking by a hydrosilylation reaction is used. Any additional silicone-based adhesive may be used as long as it has an adhesive force that maintains the shape of the optical fiber in response to the tension generated by bending the fiber. Silicone-based pressure-sensitive adhesives generally have excellent heat resistance and cold resistance, and can be used at high and low temperatures that cannot be used with non-silicone-based pressure-sensitive adhesives. In addition, it has excellent electrical insulation, chemical resistance, weather resistance, and water resistance, and exhibits excellent adhesion to a wide range of materials such as silicone rubber, silicone-impregnated glass cloth, and fluorine-based resin.

In general, a silicone-based pressure-sensitive adhesive having the above-described characteristics includes an addition-type silicone-based pressure-sensitive adhesive that is cured by crosslinking by a hydrosilylation reaction, and is cured by being crosslinked by a radical reaction with a peroxide. There is a peroxide-curable silicone-based pressure-sensitive adhesive. The peroxide-curable type is a two-stage curing method, in which after preliminarily drying at 100 ° C. or less for solvent drying, it is cured at 150 ° C. or more.
Stepwise steps are required. Therefore, there is a problem that the manufacturing process becomes complicated and by-products are generated due to decomposition of the peroxide, which causes corrosion of metals and the like. On the other hand, the addition-type silicone-based pressure-sensitive adhesive has an advantage that the curing by the crosslinking reaction is completed at a temperature of about 100 ° C. and no decomposition product is generated, so that there is no problem of odor and corrosion. When applying a silicone-based pressure-sensitive adhesive on an optical connection component or a resin protective layer, although the silicone-based pressure-sensitive adhesive has high heat resistance, a lower curing temperature is more preferable for a component to be produced than a higher curing temperature. It is much better to use an addition type silicone adhesive. Further, from the viewpoint of heat resistance, the addition-type silicone-based pressure-sensitive adhesive is higher than the peroxide-curable type, and is more preferred because it is more consistent with the object of the present invention.

Therefore, by using the addition type silicone pressure-sensitive adhesive, the production process of the pressure-sensitive adhesive sheet can be simplified as compared with the peroxide-curable type, and the resin composed of the silicone-based material can be used. As well as good adhesion with the protective layer, stress relaxation, heat resistance, cold resistance, moisture resistance,
An optical connection component having excellent reliability such as chemical resistance, dust resistance, and electrical insulation can be obtained. Therefore, the manufactured optical connection component can be adapted to a wider use environment. In addition, unlike the peroxide-curable type, a transfer method in which an adhesive layer is transferred is provided, so that it is easy to manufacture an optical connection component having only a resin protective layer without a base material, and to manufacture an optical connection component. The applicability of the method is also widened.

In the optical connecting part of the present invention, a silicone-based material may be used for forming the resin protective layer for fixing the optical fiber, and the type thereof is not particularly limited. In order to reduce the stress applied to the optical fiber, a material having flexibility is preferable, and a gel-like or rubber-like silicone-based material is particularly preferable. More specifically, silicone gel, addition type silicone rubber, and condensation type silicone rubber used for potting and sealing are preferably used.

If necessary, a protective layer may be provided on the resin protective layer on the surface of the optical connection component. When flexibility is not required much, the same substrate as the above-mentioned substrate on which the optical fiber is wired may be used, and a sheet or a plate made of an organic polymer material, ceramic or the like may be used. Further, when the optical connection component is required to be flexible, a silicone hard coat material or the like may be used as a protective layer that does not impair the flexibility.

In the optical connecting part of the present invention, usually,
For connection with the optical connector, an optical fiber extends from a desired position (port) on the end face of the optical connection component to form a termination portion, to which the optical connector is connected or connected to the optical connector. Fusion spliced with the optical fiber.
The optical connector connected to the optical connection component of the present invention is not particularly limited, but a single-core or multi-core small optical connector is preferably selected. For example, MPO optical connector, MT optical connector, MU optical connector, FPC optical connector (NTT
R & D, Vol. 45 No. 6,589) or V-groove parts used for optical connection. In addition,
The method of connecting the optical connector is not limited at all, and the terminal portion and the optical connector may be integrated.

In the present invention, the optical connecting part having one base material is manufactured as follows. For example, first, an adhesive layer made of the above-mentioned additional silicone adhesive is provided on one surface of a substrate having a two-dimensional plane, and optical fibers are wired in a desired pattern thereon. At this time, the end portion of the optical fiber is pulled out so as to be a terminal portion for optical connection with an optical connector or the like. In addition, as a method of providing an adhesive layer, on the base material, the addition type silicone-based pressure-sensitive adhesive is directly or dissolved in a solvent to form a coating solution, roll coating, bar coating,
Blade coating, casting, dispenser coating, spray coating, application by a method such as screen printing, a method of providing an adhesive layer, and,
A method in which a pressure-sensitive adhesive sheet in which an adhesive layer made of an addition-type silicone pressure-sensitive adhesive is formed on a peelable film in advance is adhered to the base material, and thereafter, a method of transferring by removing the peelable film is adopted. . The thickness of the adhesive layer may be appropriately selected and used depending on the diameter of the optical fiber to be wired, but is usually 1 μm to 1 mm, preferably 5 μm to 500 μm.
More preferably, it is set in the range of 10 to 300 μm.

A resin protective layer is formed on the optical fiber wired as described above, using a silicone-based material as a resin protective layer forming material so that the wired optical fiber is fixed in a buried state. By doing so, the optical connection component of the present invention can be manufactured.

Here, the thickness of the resin protective layer when the optical fiber is wired is appropriately selected depending on the diameter of the optical fiber to be wired and the number of overlapping layers, so that the optical fiber is protected.
What is necessary is just to make it fixed. Usually, a thickness of (optical fiber diameter) × (number of overlapping fibers) or more is required. Also,
When the optical fiber is not wired, the thickness of the resin protective layer is
Depending on the purpose of using the optical connection component, it may be appropriately selected and used with a film thickness that reduces the rigidity of the base material, but is usually about 1 μm to several cm, preferably 10 μm to
It is set to a range of 10 mm, more preferably 30 μm to 1 mm.

The simplest method of providing a resin protective layer on the base material on which the optical fiber is wired or on the back surface of the base material is to provide a weir-like material at or near the periphery of the above-mentioned base material and to form the weir-like material Is filled with a resin material and solidified. For example, a method of dissolving the material for forming the resin protective layer in an appropriate solvent to form a coating liquid, and then dropping and drying the liquid, or a method of dropping the material for forming the resin protective layer in a liquid state and curing by heating, is used. A protective layer can be formed.

The weir-like material may be usually provided at the periphery of the base material or near the periphery and over the entire periphery. However,
When mounting optical components such as an optical connector, an optical module, and an optical device in the vicinity of the periphery of the base material, the optical components may serve as a weir-like object. It is not necessary to provide a weir-like object at the portion where the sheet is placed.

The material constituting the weir-like material is not particularly limited, and may be suitably selected according to the application purpose of the optical connection part. In particular, polyethylene, polypropylene, nylon, etc. A nonwoven fabric made of an organic fiber, a nonwoven fabric made of a glass fiber, and a sealing agent (filler) made of a silicone, epoxy, urethane or acrylic resin are preferably used. Weirs are
The size and shape are not limited as long as the resin material filled inside does not flow out.

In the case where a resin protective layer is provided on the back surface of the base material of the optical connection component, when no adhesive layer is provided on the back surface of the base material, as a material for forming the resin protective layer, for example, A gel or rubber-like organic material, a curable resin such as an ultraviolet curable, electron beam curable or thermosetting resin having flexibility, a thermoplastic resin having flexibility, or the like can be used. More specifically, examples of the gel organic material include a silicone gel, an acrylic resin gel, and a fluorine resin gel, and examples of the rubber organic material include a silicone rubber, a urethane rubber, and a fluorine rubber. Rubber, acrylic rubber, ethylene-acrylic rubber, SBR, B
R, NBR, chloroprene rubber and the like. Examples of the flexible curable resin include an epoxy resin, an ultraviolet curable adhesive, and a silicone resin. Examples of the flexible thermoplastic resin include resins constituting a hot melt adhesive such as acrylic resins such as polyvinyl acetate and polyethyl methacrylate, vinylidene chloride resins, polyvinyl butyral resins, and polyamide resins.

The resin protective layer can be formed by filling these materials into the inside of the weir-like material formed as described above and solidifying the same. For example, a method for dissolving the material for forming the resin protective layer in an appropriate solvent to form a coating liquid, dripping and drying the same, a method for dropping the material for forming the resin protective layer in a heated and molten state, and a method for solidifying the solid, Forming the resin protective layer by a method in which the resin material or the entire optical connection component is heated and melted and then solidified, or a method in which a resin material for forming the resin protective layer in a liquid state is dropped and heated and cured, etc. Can be.

When an adhesive layer made of an additional silicone adhesive is provided on the back surface of the base material and an optical fiber is wired in a desired pattern, as described above, the silicone material is replaced with a material for forming a resin protective layer. May be used to form a resin protective layer.

In the case of an optical connecting part which has no base material and is fixed in a state in which the optical fiber is buried in the resin protective layer, for example, an adhesive layer made of an addition type silicone adhesive on a peelable film After a plurality of optical fibers are wired thereon, a resin protective layer is formed using a silicone-based material as described above, and after removing the peelable film, the resin protective layer is formed on the exposed adhesive layer. In the same manner as above, a resin protective layer made of the same or different resin protective layer forming material may be formed. In that case, a plurality of optical fibers may be wired on the exposed adhesive layer, and a resin protective layer may be formed thereon using a silicone-based material.

Further, a plurality of optical connecting parts are prepared in advance by the above-mentioned method, and an adhesive layer made of an addition type silicone pressure-sensitive adhesive is directly provided on the surface of the resin protective layer. The adhesive layer is provided by transferring the adhesive layer from the adhesive sheet provided with the adhesive layer to the surface of the resin protective layer of the optical connection component, and the plurality of optical connection components are attached via the adhesive layer. Thus, it is also possible to produce an optical connection component composed of a laminate having a multilayer structure.

In the optical connection component of the present invention produced as described above, an optical component such as an optical connector or an optical module is joined to the terminal portion of the drawn optical fiber. For example, the end of the optical fiber that has been subjected to the end face treatment to be connected to the optical connector is connected to the optical connector, or an optical fiber end face fixed to the optical connector,
The end face of each optical fiber pulled out from the optical fiber wiring member is fusion-spliced.

[0037]

The present invention will be described below with reference to examples.
The present invention is not limited to this. Example 1 An addition type silicone-based pressure-sensitive adhesive coating solution composed of SD4590 / BY24-741 / SRX212 / toluene (= 100 / 1.0 / 0.9 / 50 (parts by weight)) (both manufactured by Dow Corning Toray) (SD4590 as main agent, B
It is an addition type silicone adhesive using Y24-741 and SRX212 as curing agents. ) Was prepared. This additional silicone-based pressure-sensitive adhesive coating solution is applied on one surface of a polyimide film having a thickness of 125 μm so that the film thickness after drying becomes 100 μm to form an additional silicone-based pressure-sensitive adhesive layer. (Size 210 mm x 297 mm). An optical fiber core wire (carbon fiber optical fiber, 250 μm diameter, manufactured by Furukawa Electric Co., Ltd.) per port (portion where the optical fiber was taken out from the optical connection member) was wired as follows. That is, 16 optical fibers are arranged in parallel at a pitch of 300 μm, and 8 ports each (each port is composed of 16 optical fibers) are 25 mm on both sides of the short side of the polyimide film.
Fabricated at pitch. Each optical fiber is wired from one short side to the other short side of the polyimide film, and the wiring to each port on both sides is a desired free access wiring (128) for each optical fiber by design. The wiring was adjusted so that the maximum number of overlaps was three.

Thereafter, a silicone-based filler (manufactured by Konishi Corporation, Bath Bond) was applied to the periphery of the polyimide film on which the optical fiber was wired, and the width was 1.5 mm and the thickness was 1 m.
m were formed. Next, a silicone gel coating solution (SE-188, manufactured by Dow Corning Toray Co., Ltd.)
0) was dropped, the silicone gel was cured at 120 ° C. for 1 hour to form a resin protective layer, and the optical fiber was fixed by the resin protective layer to produce an optical wiring board having a thickness of 1.2 mm. did. Thereafter, an MU connector was connected to the end of the drawn optical fiber to obtain an optical wiring board as a final product.

The produced optical wiring board has good adhesiveness of the resin protective layer formed from the additional silicone adhesive and the silicone gel, the optical fibers are sufficiently fixed, and the optical fibers in the wiring pattern are misaligned (wiring). There was no pattern collapse, and there was no problem with destruction due to deformation such as bending of the optical wiring board.

When the loss of all the connected optical fibers was measured, the loss including the connection loss of the optical connector was reduced to 0.
It was 4 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.2 dB or less, which proved that it could be sufficiently used as an optical connection part.

Example 2 In Example 1, on both sides of a polyimide film having a thickness of 125 μm, the addition type silicone adhesive used in Example 1 was applied so that the thickness of the adhesive layer became 100 μm. A releasable film was stuck on one side to prepare a film-shaped substrate (size 210 mm × 297 mm). An optical fiber was wired on one surface of this polyimide film in the same manner as in Example 1, and then a silicone rubber coating solution (KE45, manufactured by Shin-Etsu Chemical Co., Ltd.) was used instead of the silicone-based filler.
-T), the width of 1.5 mm around the periphery of the polyimide film.
mm and a height of 1 mm, and a silicone rubber coating solution (TSE399, manufactured by Toshiba Silicone Co., Ltd.)
1) was dropped, and the silicone-based material was cured at 25 ° C. for 24 hours to form a first resin protective layer, and the optical fiber was fixed in a buried state.

Thereafter, the peelable film on the back surface of the polyimide film was removed, and 64 fibers were placed on the adhesive layer so that the total number of optical fibers was 64 and the maximum overlap of the optical fibers was 2. For free access wiring. Then, a silicone rubber coating solution (KE, manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the periphery of the polyimide film on which the optical fiber is wired.
45-T) to form a weir-like material having a width of 1.5 mm and a height of 500 μm. Next, a silicone rubber coating solution (TSE389, manufactured by Toshiba Silicone Co., Ltd.) is dropped on the inside, and the silicone rubber is cured at 25 ° C. for 24 hours to form a second resin protective layer. Was fixed in a buried state to produce an optical wiring board having a thickness of 1.8 mm. Thereafter, an MU connector was connected to the end of the drawn optical fiber to produce an optical wiring board as a final product.

The produced optical wiring board has good adhesiveness of the resin protective layer formed of the additional silicone adhesive and silicone rubber, the optical fiber is sufficiently fixed, and the optical fiber in the wiring pattern is displaced (wiring). There is no pattern collapse), and since the resin protective layer made of silicone rubber is provided on both sides of the polyimide film, flexibility is increased, and there is a problem with respect to destruction due to deformation such as bending of the optical wiring board. Did not.

When the loss of all the connected optical fibers was measured, the loss including the connection loss of the optical connector was measured.
It was 4 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.1 dB or less, which proved that it could be sufficiently used as an optical connection part.

Example 3 In place of the addition type silicone pressure-sensitive adhesive coating liquid in Example 2, SD4592 / BY24-741 / SRX21 was used.
2 / toluene (= 100 / 1.0 / 0.9 / 50 (parts by weight)) addition-type silicone-based pressure-sensitive adhesive coating solution (both manufactured by Dow Corning Toray) (addition-type silicone having SD4592 as a main component) Two optical connection parts were produced in the same manner as in Example 2 except that a pressure-sensitive adhesive was used. Then, an additional silicone-based pressure-sensitive adhesive coating solution (SD4592 / BY24-741 / SRX, manufactured by Dow Corning Toray Co., Ltd.) was applied to the second resin protective layer of one of the optical connection parts.
(212 / toluene = 100 / 1.0 / 0.9 / 50 (parts by weight)) by a dispenser coating method to form an adhesive layer such that the thickness after drying becomes 100 μm. Another optical connection component was superimposed and adhered thereon, thereby producing an optical wiring board composed of a laminated body having a thickness of 3.7 mm.

The produced optical wiring board has good adhesiveness of the resin protective layer formed from the additional silicone adhesive and silicone rubber, the optical fiber is sufficiently fixed, and the optical fiber in the wiring pattern is displaced (wiring). There is no pattern collapse), and since the resin protective layer made of silicone rubber is provided on both sides of the polyimide film, flexibility is increased, and there is a problem with respect to destruction due to deformation such as bending of the optical wiring board. Did not.

The loss of all the connected optical fibers was measured.
It was 3 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.15 dB or less, which proved that it could be sufficiently used as an optical connection part.

Example 4 In the same manner as in Example 1, an optical fiber was treated with an additional silicone adhesive (SD4590 / B, manufactured by Dow Corning Toray Co., Ltd.).
Y24-741, SRX212) and two 125 μm-thick polyimide films wired on the adhesive layer. Then, a silicone rubber coating solution (KE45-, manufactured by Shin-Etsu Chemical Co., Ltd.) was applied to the periphery of one of the polyimide films.
T) was applied to form a weir having a width of 2.5 mm and a height of 2 mm. Next, a silicone rubber coating solution (manufactured by Dow Corning Toray Co., Ltd., SE9176L) was dropped on the inside, and a polyimide film to which the other optical fiber was wired was covered from above, and the condition was applied at 25 ° C. for 24 hours. The silicone rubber was cured. Thereafter, a silicone rubber coating solution (KE45-T, manufactured by Shin-Etsu Chemical Co., Ltd.) is applied to the periphery of the back surface of each polyimide film to form a weir-like material having a width of 1.5 mm and a height of 500 μm. , Silicone rubber coating solution (manufactured by Dow Corning Toray, SE170
1) was added dropwise and cured at 120 ° C. for 30 minutes to form second and third resin protective layers having a thickness of 3.45 m.
m was prepared. Thereafter, an MU connector was connected to the end of the drawn optical fiber to produce an optical wiring board as a final product.

The produced optical wiring board has good adhesion of the resin protective layer formed of the additional silicone-based adhesive and silicone rubber, the optical fiber is sufficiently fixed, and the optical fiber in the wiring pattern is displaced (wiring). Since the resin protective layer formed of silicone rubber is provided on both sides of the polyimide film without any pattern collapse, the flexibility of the optical connection parts is increased, and the optical connection board is not damaged by deformation such as bending. There was no problem.

When the loss of all the connected optical fibers was measured, the loss including the connection loss of the optical connector was measured.
It was 4 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.2 dB or less, which proved that it could be sufficiently used as an optical connection part.

Example 5 The addition type silicone-based pressure-sensitive adhesive coating liquid used in Example 3 (SD4592 / BY24-7, manufactured by Dow Corning Toray Co., Ltd.)
41 / SRX212), on one surface of a silicone-based release film having a thickness of 75 μm,
It was coated to a thickness of μm to form an additional silicone-based pressure-sensitive adhesive layer, thereby producing a sheet (size 210 mm × 297 mm). An optical fiber was wired in the same manner as in Example 1. Thereafter, a weir-like material of a silicone-based filler (manufactured by Konishi Co., Ltd., bus bond) is formed on the periphery of the peelable film on which the optical fiber is wired in the same manner as in Example 1, and silicone rubber is applied inside the weir-like material. Liquid (KE, manufactured by Shin-Etsu Chemical Co., Ltd.)
109), the silicone rubber was cured at 150 ° C. for 30 minutes to form a first resin protective layer.

Next, the silicone-based release film was peeled off, and a second resin protective layer was formed on the exposed backside pressure-sensitive adhesive layer. That is, a silicone-based filler (manufactured by Konishi Co., Ltd., Bath Bond) is applied to the periphery of the pressure-sensitive adhesive layer on the back surface to form a weir-like material having a width of 1.5 mm and a height of 500 μm. Coating solution (Shin-Etsu Chemical Co., Ltd.
Using KE109), the silicone rubber is cured at 150 ° C. for 30 minutes to form a second resin protective layer,
An optical wiring board having a thickness of 1.6 mm was produced. Thereafter, an MU connector was connected to the end of the drawn optical fiber to obtain an optical wiring board as a final product.

The produced optical wiring board has good adhesion between the additional silicone-based adhesive and the resin protective layer formed of silicone rubber, the optical fibers are sufficiently fixed, and the optical fibers in the wiring pattern are misaligned. There is no collapse of the wiring pattern, and the resin protective layer made of silicone rubber is merely joined via the additional silicone-based pressure-sensitive adhesive layer. Thus, there is no problem with respect to destruction due to deformation such as bending of the optical wiring board.

The loss of all the connected optical fibers was measured.
It was 3 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.2 dB or less, which proved that it could be sufficiently used as an optical connection part.

Example 6 Instead of the silicone material in Example 5, a silicone rubber coating solution (TSE303, manufactured by Toshiba Silicone Co., Ltd.) was used.
A first resin protective layer was formed in the same manner as in Example 5, except that curing was performed at 150 ° C. for 30 minutes using 3). Next, the silicone-based release film was peeled off, and each port was composed of eight optical fibers on the exposed adhesive layer on the back surface, the total number of optical fibers was 64, and the largest of the optical fibers The optical fibers were wired so that the overlap was two.

Thereafter, a second resin protective layer was formed on the adhesive layer on which the optical fibers were wired. That is, a silicone-based filler (manufactured by Konishi Co., Ltd., Bath Bond) is applied to the periphery of the pressure-sensitive adhesive layer on the back surface, and is 1.5 mm wide and 50 mm high.
A 0 μm weir-like material was formed, and the inside thereof was cured at 150 ° C. for 30 minutes using a silicone rubber coating solution (TSE3033 manufactured by Toshiba Silicone Co., Ltd.) to form a second resin protective layer. An optical wiring board having a thickness of 1.6 mm was produced. Thereafter, an MU connector was connected to the end of the drawn optical fiber to obtain an optical wiring board as a final product.

The produced optical wiring board has good adhesiveness between the additional silicone adhesive and the resin protective layer formed of silicone rubber, the optical fibers are sufficiently fixed, and the optical fibers in the wiring pattern are misaligned. There is no collapse of the wiring pattern, and the resin protective layer made of silicone rubber is merely joined via the additional silicone-based pressure-sensitive adhesive layer. Thus, there is no problem with respect to destruction due to deformation such as bending of the optical wiring board.

The loss of all the connected optical fibers was measured.
It was 4 dB or less. In addition, the fabricated optical wiring board was subjected to a high-temperature and high-humidity test of leaving at 5,000C for 90 hours at 75 ° C and a temperature cycle test of -40 ° C to 75 ° C for 500 times. It was 0.15 dB or less, which proved that it could be sufficiently used as an optical connection part.

[0059]

As described above, among the silicone adhesives, the silicone adhesives which are crosslinked and cured by the hydrosilylation reaction, which is particularly excellent in heat resistance and cold resistance, as described above. Silicone adhesive)
By using in combination with a silicone-based material as a material for forming a resin protective layer, it is more excellent in environmental resistance and reliability, and therefore can be adapted to a wide temperature range and a wide use environment. Also, since the adhesive and the resin protective layer are composed of the same type of silicone material,
It is excellent in adhesiveness, so that there is no displacement of the optical fiber in the wiring pattern (collapse of the wiring pattern), and the optical fiber is tough against destruction due to deformation such as bending of the optical wiring board. In addition, the use of the additional silicone-based pressure-sensitive adhesive lowers the curing temperature, eliminates the generation of cured by-products, and enables the transfer method, thereby facilitating the manufacturing process of the pressure-sensitive adhesive sheet and the optical connection component.

[Brief description of the drawings]

FIG. 1 is a partially broken plan view of an example of an optical connection component of the present invention.

FIG. 2 is a cross-sectional view of the optical connection component of FIG.

FIG. 3 is a sectional view of another example of the optical connection component of the present invention.

FIG. 4 is a sectional view of another example of the optical connection component of the present invention.

FIG. 5 is a sectional view of another example of the optical connection component of the present invention.

FIG. 6 is a sectional view of another example of the optical connection component of the present invention.

FIG. 7 is a sectional view of another example of the optical connecting component of the present invention.

FIG. 8 is a sectional view of another example of the optical connection component of the present invention.

FIG. 9 is a cross-sectional view of another example of the optical connection component of the present invention.

FIG. 10 is a cross-sectional view of another example of the optical connection component of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Base material, 2, 2 ', 2 ", 2a ... Resin protective layer, 3
3 ', 3a ... adhesive layer, 4, 4', 4 "... optical fiber,
5: Terminating part, 6: Optical components such as optical connectors and optical modules, 7: Weirs, 8: Optical connecting parts.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-11-119033 (JP, A) JP-A-6-265763 (JP, A) JP-A-62-18011 (JP, A) 39058 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G02B 6/00 G02B 6/08 G02B 6/44

Claims (6)

(57) [Claims] 1. An optical connection comprising a plurality of optical fibers wired in a two-dimensional plane and having an end portion for optical connection to an end portion, and at least one resin protective layer fixing the optical fiber. In the component, the resin protective layer is made of a silicone-based material, and is bonded to a base material or another resin protective layer via an adhesive layer, and the adhesive layer is crosslinked by a hydrosilylation reaction. An optical connection part comprising a silicone-based adhesive that cures. 2. The resin protective layer according to claim 1, wherein the resin protective layer is formed by filling a silicone-based material inside a weir-shaped material provided at or near the periphery of the base material or another resin protective layer. Optical connection parts. 3. The optical connection component according to claim 1, wherein the resin protective layer is formed of a gel-like or rubber-like silicone-based material. 4. The optical connection component according to claim 1, wherein the resin protective layer for fixing the optical fiber is bonded to both surfaces of the base material via respective adhesive layers. 5. The optical connection component according to claim 1, wherein a plurality of resin protective layers fixing the optical fiber are joined via an adhesive layer. 6. A laminate is formed by bonding the plurality of optical connection parts according to claim 1 or 2 via an adhesive layer made of a silicone-based adhesive which is crosslinked and cured by a hydrosilylation reaction. An optical connecting part characterized by the following.