JP2000352626A - Optical connecting parts - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide optical connecting parts which are fixed with optical fibers without the occurrence of the misalignment of the optical fibers and allow the laying and housing of the many optical fibers. SOLUTION: The optical connecting parts are two-dimensionally arranged with the plural optical fibers 4 having terminal portions for optical connection at their ends on a base material 1 via an adhesive layer 3 or are two- dimensionally arranged with the plural optical fibers 4 by the adhesive layer 3 and these fibers are fixed and protected by a resin protective layer 2. The adhesive layer consists of a pressure sensitive adhesive and the peeling force of the pressure sensitive adhesive per piece of the coated optical fibers is 1 to 1000 mg per μm film thickness of the adhesive layer.

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, in this method, when the fixing force of the optical fiber due to the adhesive force of the adhesive becomes weak, the optical fiber moves, causing a problem that the optical fiber in the wiring pattern is displaced (the wiring pattern is broken). Further, when the adhesive strength of the pressure-sensitive adhesive is weak, there is a problem that the optical wiring board is extremely weak against destruction due to deformation such as bending. Therefore, there is a demand for a pressure-sensitive adhesive which has high adhesiveness for fixing an optical fiber and which does not give stress-strain due to adhesion causing light loss to a fixed optical fiber or a base material.

[0004]

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 fix an optical fiber without causing a displacement (disruption of a wiring pattern) of an optical fiber wired in a two-dimensional plane with respect to the optical fiber wiring congested as described above, Another object of the present invention is to provide an optical connection component having an adhesive layer that does not give stress distortion due to adhesion to an optical fiber or a base material.

[0005]

According to the optical connecting part of the present invention, a plurality of optical fibers each having an end portion for optically connecting to an end portion are formed on a substrate in a two-dimensional plane via an adhesive layer. The plurality of optical fibers are wired or two-dimensionally wired by an adhesive layer, and fixed and protected by a resin protective layer, wherein the adhesive layer is made of a pressure-sensitive adhesive. The peeling force of the pressure-sensitive adhesive per optical fiber is 1 mg per 1 μm of the thickness of the adhesive layer.
１０００1000 mg.

When the optical connecting part of the present invention is fixed and protected by the above-mentioned resin protective layer, the base material may not be present, and the two resin protective layers may serve as an adhesive layer. The optical fibers, which are superimposed on each other and are two-dimensionally wired by an adhesive layer, may be fixed to at least one of the resin protective layers in a buried state.

In the present invention, "peeling force of pressure-sensitive adhesive"
Is the force required to peel the optical fiber attached to the adhesive layer, and means a value measured by the “optical fiber peel test method” described below.

1) The following test pieces are prepared. Twenty optical fiber core wires with a length of 150 mm and a thickness of 25 m
An optical fiber bundle for evaluation is prepared by arranging and bonding in parallel at a pitch of 1 mm on the polyimide film of m (see FIG. 1). However, when the diameter of the optical fiber is 0.8 mm or more, a fiber in which ten optical fibers are arranged at a pitch of 2 mm is prepared. By forming the polyimide film into a strip shape as shown in FIG. 1, the rigidity of the film can be ignored and the peeling force of only the optical fiber can be measured. A pressure-sensitive adhesive layer for measurement (width 20 mm or more, length 150 mm or more, thickness of the pressure-sensitive adhesive layer should not exceed the diameter of the optical fiber) on a washed 2 mm thick soda glass plate. ) Is prepared.

2) JIS B 772 as a test device
Use a tensile tester according to 1. 3) As test conditions, conditions of 23 ± 2 ° C. and 65 ± 5% RH are adopted. 4) Test method A roller having a weight of 700 ± 17.5 g (with a spring hardness of 80 specified in JIS K6301).
± 5Hs, covered with rubber layer about 6mm thick, width 45
mm and a diameter of about 95 mm), the evaluation optical fiber bundle is attached to the pressure-sensitive adhesive layer for measurement on the soda glass plate. The roller speed at that time is about 300 mm per minute.
And make one round trip. However, about 30 mm at the end of the optical fiber bundle is not attached.

A jig capable of peeling an optical fiber at an angle of 90 degrees is prepared, and a soda glass plate provided with a pressure-sensitive adhesive layer (film thickness M μm) of a measurement sample is attached to the jig. Between the lower grip of the tensile tester,
The non-adhered portion of the end of the optical fiber was sandwiched between the upper grips of a tensile tester, and was pressed at a rate of 300 min.
The optical fiber bundle is peeled off at a speed of ± 30 mm. 80mm from the point of 20mm
The average value of the force up to mm is determined. The above measurement is performed three times, and the average value is defined as the peeling force W (mg) of the pressure-sensitive adhesive for measurement. The required peeling force R (mg) per optical fiber and per 1 μm thickness of the pressure-sensitive adhesive layer is determined as follows. R = W / M / 20 (mg) (optical fiber diameter is 0.8 mm
R = W / M / 10 (mg) (optical fiber diameter is 0.8 mm)
Above)

[0011]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 2 is a partially broken plan view of an example of the optical connection component of the present invention, and FIG. 3 is an example of a cross-sectional view thereof. FIG. 4 is a cross-sectional view of an example of the optical connection component of the present invention using two substrates having a pressure-sensitive adhesive layer. FIG. 5 is an optical connection component of the present invention in which substrates are present on both surfaces of a resin protective layer. FIG. 6 is a cross-sectional view of an example of the component, and FIG. 6 is a cross-sectional view of an example of the optical connection component of the present invention where no base material is present.

2 and 3, an adhesive layer 3 is provided on one surface of a substrate 1 having a two-dimensional plane, and a plurality of optical fibers 4 are wired in a two-dimensional plane via the adhesive layer. These optical fibers 4 are fixed by a resin protective layer 2 having flexibility. 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 connecting part shown in FIG. 4 corresponds to the adhesive layer 3 shown in FIG.
A substrate 1 having another adhesive layer 3 is adhered on a substrate 1 on which an optical fiber 4 is wired in a two-dimensional plane via a substrate. The optical connecting part shown in FIG. 5 includes a base 1 ′ on which an optical fiber 4 ′ is two-dimensionally wired on the upper surface of the resin protective layer 2 in the optical connecting part shown in FIG. 3 via another adhesive layer 3 ′. It is attached. In addition, the optical connection component shown in FIG.
A plurality of optical fibers 4 are wired in a two-dimensional plane over the adhesive layer 3 via an adhesive layer 3, and these optical fibers 4 are fixed by the resin protective layer 2.

When the optical connecting component of the present invention has a substrate, the flexible substrate having a two-dimensional plane for supporting the wired optical fiber is not particularly limited. , Glass-epoxy resin composite substrate,
Polyester film, polyimide film, gel material of organic material such as silicone or urethane resin, rubber-like material or foam-like material, and the like, ordinary electronic parts,
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 the shape may be any.

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 the present invention, the adhesive layer is composed of a pressure-sensitive adhesive, and the peeling force of the pressure-sensitive adhesive is 1 mg per optical fiber core and 1 μm per 1 μm of film thickness of the adhesive layer.
１０００1000 mg, preferably 5
mg to 500 mg, particularly preferably 10 mg to 300 m
g. By having a peeling force in this range, the shape of the optical fiber is maintained in accordance with the tension generated by bending the optical fiber to be wired, and the optical fiber has such an adhesive force that the optical fiber is not subjected to stress distortion by bonding. become. As the pressure-sensitive adhesive (adhesive) constituting the adhesive layer, any material can be used as long as it has a peeling force in the above range. For example, urethane, acrylic, epoxy, nylon, Various pressure-sensitive adhesives such as phenol, polyimide, vinyl, silicone, rubber, fluorinated epoxy, and fluorinated acrylic can be used.

In the present invention, when the peeling force of the pressure-sensitive adhesive per optical fiber core wire in the adhesive layer is less than 1 mg per 1 μm of the film thickness of the adhesive layer, the bending of the optical fiber to be wired is performed. In this case, the shape of the wiring pattern cannot be maintained in accordance with the tension generated in the step (1), and the optical fiber shifts in the wiring pattern (collapse of the wiring pattern). On the other hand, if the thickness of the adhesive layer exceeds 1000 mg / μm, the wired optical fiber is subjected to stress distortion due to adhesion, causing local micro-bending, breakage of the optical fiber at the time of wiring, etc., and light loss. And the film-shaped substrate is distorted and deformed.

When a resin protective layer is present in the optical connecting part of the present invention, the resin constituting the resin protective layer is not particularly limited. For example, a gel or rubber organic material, an ultraviolet curable resin For example, a curable resin such as an electron beam curable resin or a thermosetting resin having flexibility and a thermoplastic resin having flexibility are used. More specifically, examples of the gel organic material include a silicone gel, an acrylic resin gel, and a fluororesin gel. Examples of the rubber organic material include a silicone rubber, a urethane rubber,
Fluorine rubber, acrylic rubber, ethylene-acrylic rubber, SBR, BR, NBR, chloroprene rubber and the like can be mentioned. Examples of the flexible curable resin include an epoxy resin, an ultraviolet curable adhesive, and a silicone resin. Examples of the thermoplastic resin having flexibility include resins constituting a hot melt adhesive such as an acrylic resin such as polyvinyl acetate and polyethyl methacrylate resin, a vinylidene chloride resin, a polyvinyl butyral resin, and a polyamide resin. .

Incidentally, if necessary, a protective layer may be further provided on the resin protective layer serving as the surface of the optical connection component. In the case where 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 and a plate-like body made of an organic polymer material, ceramic or the like may be used. Further, when the optical connection component is required to be flexible, for example, a silicone-based 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. The method of connecting the optical connector is not limited at all, and the terminal portion and the optical connector may be integrated.

The above-mentioned optical connecting part of the present invention is manufactured as follows. For example, first, an adhesive layer made of the above-described pressure-sensitive adhesive is provided on one surface of a substrate having a two-dimensional plane, and an optical fiber is wired thereon in a desired pattern. At this time, the end of the optical fiber is pulled out so as to be an end portion for optical connection with an optical connector or the like.
In addition, as a method of providing an adhesive layer, the pressure-sensitive adhesive is directly on the base material or in a state of being dissolved in a solvent to form a coating solution, roll coating, bar coating, blade coating, casting, dispenser coating, Spray coating, applying by a method such as screen printing, a method of providing an adhesive layer, and affixing an adhesive sheet in which an adhesive layer formed of a pressure-sensitive adhesive is formed on a peelable film in advance to the base material, and then And a method of transferring by removing the peelable film. Further, an adhesive sheet in which an adhesive layer made of a pressure-sensitive adhesive is formed on a peelable film can be used as a temporary base as it is. The thickness of the adhesive layer is
It 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.
m, more preferably in the range of 10 to 300 μm.

In the optical connecting part of the present invention, when the wired optical fiber is fixed and protected by the resin protective layer, the optical fiber is wired on the optical fiber wired as described above.
The resin protective layer may be formed using a resin material for forming the resin protective layer so that the wired optical fiber is fixed and protected in a buried state.

Here, the thickness of the resin protective layer for fixing and protecting the wired optical fiber is appropriately selected according to the diameter of the optical fiber to be wired and the number of overlapping layers, so that the optical fiber is protected and fixed. What should I do? Usually, a thickness of (optical fiber diameter) × (number of overlapping fibers) or more is required. Further, the thickness of the resin protective layer when the optical fiber is not wired, depending on the purpose of using the optical connection component, may be appropriately selected and used in a thickness enough to reduce the rigidity of the base material, Usually, about 1 μm to 10 mm, preferably 10 μm to 5 mm, more preferably 30 μm to 1 mm
Is set in the range.

The simplest method of providing a resin protective layer on a substrate on which an optical fiber is wired is to provide a weir-like material at or near the periphery of the above-mentioned substrate and to provide an inner portion of the formed weir-like material. What is necessary is just to fill and solidify the resin material. For example, a method of dissolving a resin material in an appropriate solvent to form a coating liquid, dripping and drying, a method of dropping and solidifying the resin material while heating and melting, a method of filling the resin material in a solid state, Alternatively, the resin protective layer can be formed by a method in which the entire optical connection component is heated and melted and then solidified, or a method in which a resin material in a liquid state is dropped and cured by heating or humidification.

Usually, the weir-like material may be provided at or near the periphery of the substrate over the entire periphery. However,
In the case where optical components such as an optical connector, an optical module, and an optical device are mounted near the periphery of the base material, when those optical components serve as a weir-like material, the optical component is mounted on a portion where the optical components are mounted. May not be provided with a weir.

The material constituting the weir-like material is not particularly limited, and may be suitably selected according to the purpose of application 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.

After the resin material for forming the resin protective layer is dropped on the optical fiber wired as described above, the optical fiber is wired thereon via the adhesive layer in the same manner as described above. The base material may be stacked and integrated to form an optical connection component having two base materials.

In the case of producing an optical connecting part having no base material, for example, when a releasable film is used temporarily as a base material, an adhesive layer comprising the pressure-sensitive adhesive is formed on the releasable film. , And a plurality of optical fibers may be wired thereon. Thereafter, a resin protective layer is formed using the resin material for forming the resin protective layer as described above, and after removing the peelable film, on the exposed adhesive layer, in the same manner as above, the same or A resin protective layer made of a different resin material is formed, and the optical fiber is fixed in a buried state. In the above case, a plurality of optical fibers may be wired on the adhesive layer exposed by removing the peelable film, and a resin protective layer may be formed thereon in the same manner as described above.

As another example of producing an optical connection component having no base material, an adhesive layer made of a pressure-sensitive adhesive is provided directly on a flexible resin protective layer in the same manner as described above. A plurality of optical fibers may be wired thereon, and a resin protective layer made of the same or different resin material as described above may be formed thereon.

Further, after the optical fiber is wired on the base material via the adhesive layer, a pressure-sensitive adhesive layer is formed on the optical fiber without providing a resin protective layer for fixing and protecting the optical fiber. By bonding a sheet or a plate made of an organic polymer material having the above and a ceramic or the like, an optical connection component can also be produced. In that case, the substrate and the pressure-sensitive adhesive layer may be the same as or different from those described above.

In the optical connecting part of the present invention produced as described above, an optical part such as an optical connector or an optical module is joined to the terminal part 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.

[0032]

The present invention will be described below with reference to examples.
The present invention is not limited to this. Test Example A coating solution of the pressure-sensitive adhesive (adhesive) shown in Table 1 and Table 2 (the acrylic adhesive in Table 1 was a 30% by weight solution of acrylic resin in ethyl acetate) was roll-coated to a thickness of 100 μm. An adhesive layer is formed on one surface of a polyester (PET) film and a release film having a thickness of 38 μm so that the film thickness after drying becomes a value shown in Table 3, and a sheet having the adhesive layer and a release property A film was prepared.

Next, after the peelable film having the above-mentioned adhesive layer was attached to a soda glass plate having a thickness of 2 mm,
The peelable film was removed to prepare an adhesive sheet for measurement. Using this adhesive sheet, measurement was performed by the optical fiber peeling test method, and the peeling force per optical fiber core wire and 1 μm of the adhesive layer was determined. Table 3 shows the results.

Further, an optical fiber was wired on the adhesive layer of the PET film having the adhesive layer as shown in FIG. 7, and it was confirmed whether or not the wiring pattern was broken immediately after bonding and after 3 hours. did. Table 3 also shows the results.

[0035]

[Table 1] Notes: 1) Explanation of symbols of acrylic resin n-BA: n-butyl acrylate MA: methyl acrylate MMA: methyl methacrylate 2-EHA: 2-ethylhexyl acrylate AA: acrylic acid 2-HEMA: methacrylic acid 2- Hydroxyethyl 2-HEA: 2-hydroxyethyl acrylate 2) Adhesion-imparting agent: Picola Stick E-75 (Herc
ules Co., Ltd.) The number is the addition amount to 100 parts of the acrylic resin. 3) Crosslinking agent: Coronate L (manufactured by Nippon Polyurethane Industry Co., Ltd.) The number is the addition amount to 100 parts of a 30% ethyl acetate solution of the acrylic resin.

[0036]

[Table 2] Note: 1) Toray Dow Corning Co., Ltd. together with the base resin and curing agent 2) The number in parentheses indicates the amount added (parts by weight)

[0037]

[Table 3] * 1: Peeling force per 20 optical fibers (optical fiber diameter 9
Peeling force per 10 fibers for 00 μm) * 2: Peeling force per 1 μm of adhesive layer per optical fiber

As is evident from the results shown in Table 3, the adhesive layer 1
When the peeling force of the pressure-sensitive adhesive per μm is less than 1 mg,
Immediately after the optical fiber is wired on the adhesive layer, the wiring pattern has already collapsed, and the optical fiber cannot be fixed according to the intended wiring pattern.

Example 1 A coating solution of the acrylic pressure-sensitive adhesive C shown in Table 1 was prepared. The coating liquid of the acrylic pressure-sensitive adhesive C was applied on one surface of a polyimide film having a thickness of 125 μm to a thickness of 100 μm after drying.
To form an acrylic pressure-sensitive adhesive layer, thereby producing a sheet (size 210 mm × 297 mm). An optical fiber cable (Furukawa Electric Co., Ltd., 2
(50 μm diameter) per port (portion where the optical fiber is taken out from the optical connection member) and wired as follows. That is, 16 optical fibers were arranged in parallel at a pitch of 300 μm, and eight ports (each port was composed of 16 optical fibers) were formed on both sides of the short side of the polyimide film at a pitch of 25 mm. 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 designed by a desired free access wiring (128
), And the maximum number of overlaps was three by adjusting the wiring of the optical fiber.

Thereafter, a silicone filler (manufactured by Konishi Co., Ltd., bus bond) was used to surround the periphery of the polyimide film on which the optical fiber was wired, with a width of 1.5 mm and a height of 1 mm.
Was 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. Was prepared. Thereafter, an MU connector was connected to the end of the drawn optical fiber to obtain an optical wiring board as a final product.

When the loss of all the connected optical fibers was measured, the loss was 0.4 dB including the connection loss of the optical connector.
It was below. In addition, about the produced optical wiring board, 75
When a high-temperature and high-humidity test left for 5000 hours at 90 ° C. and 90% RH and a temperature cycle test for 500 times at −40 ° C. to 75 ° C. were performed, both changes and fluctuations in optical loss were 0.2 dB.
It was as follows, and it turned out that it can fully be used as an optical connection part.

Example 2 The acrylic pressure-sensitive adhesive C of the coating solution in Example 1 was prepared as shown in Table 1.
Example 1 except that the acrylic adhesive F was changed to
In the same manner as in the above, two pressure-sensitive adhesive sheets were produced. Then
On one adhesive sheet, 128 optical fibers were wired in the same manner as in Example 1. Another adhesive sheet is stuck on the adhesive sheet on which the optical fiber is wired, and the thickness is 1.
An optical wiring board of 2 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.

When the loss of all the connected optical fibers was measured, the loss was 0.7 dB including the connection loss of the optical connector.
It was below. In addition, about the produced optical wiring board, 75
When a high-temperature and high-humidity test left for 5000 hours at 90 ° C. and 90% RH and a temperature cycle test for 500 times at −40 ° C. to 75 ° C. were performed, the change and fluctuation of light loss were both 0.5 dB.
It was as follows, and it turned out that it can fully be used as an optical connection part.

Example 3 The acrylic pressure-sensitive adhesive C of the coating solution in Example 1 was prepared as shown in Table 1.
Example 1 except that the acrylic adhesive G was changed to
In the same manner as in the above, two pressure-sensitive adhesive sheets were prepared, optical fibers were wired, and two 125 μm-thick polyimide films having optical fibers wired on the pressure-sensitive adhesive layer were prepared.

Thereafter, 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 (TSE399, manufactured by Toshiba Silicone Co., Ltd.) is dropped on the inside, and the other polyimide film on which the optical fiber is wired is covered from above, and the silicone material is applied at 25 ° C. for 24 hours. Was cured to form a resin protective layer. Thus, an optical wiring board having a thickness of 2.45 mm in which the optical fiber was protected and fixed by the resin protective layer was produced. afterwards,
An MU connector was connected to the end of the drawn optical fiber to obtain an optical wiring board as a final product.

When the loss of all the connected optical fibers was measured, the loss including the connection loss of the optical connector was 1.0 dB.
It was below. In addition, about the produced optical wiring board, 75
When a high-temperature and high-humidity test left for 5000 hours at 90 ° C. and 90% RH and a temperature cycle test for 500 times at −40 ° C. to 75 ° C. were performed, both changes and variations in optical loss were 0.8 dB.
It was as follows, and it turned out that it can fully be used as an optical connection part.

Example 4 A coating solution of the silicone-based pressure-sensitive adhesive A shown in Table 2 was applied to a thickness of 7
One side of a 5 μm silicone-based release film is coated so that the film thickness after drying becomes 100 μm to form a silicone-based pressure-sensitive adhesive layer, and a sheet (size 210 mm × 297)
mm).

In the first embodiment, each port is composed of eight optical fibers, and the wiring conditions of the optical fibers are such that the total number of all optical fibers is 64 and the maximum overlap of the optical fibers is two. I did it. In addition, the width of the weir-like object is set to 1.
0 mm, height 500 μm, a silicone rubber coating solution (TSC, TS
E399), and a first resin protective layer was formed in the same manner as in Example 1 except that the composition was cured at 25 ° C. for 24 hours. Next, the silicone-based release film of the pressure-sensitive adhesive sheet on the back surface was peeled off, and on the exposed pressure-sensitive adhesive layer,
A second resin protective layer was formed. That is, a silicone filler (manufactured by Konishi Corporation, Bath Bond) was applied to form a weir-like material having a width of 0.6 mm and a height of 0.3 mm. Then, a silicone rubber coating solution (TSE399, manufactured by Toshiba Silicone Co., Ltd.) is dropped on the inside, and cured at 25 ° C. for 24 hours to form a second resin protective layer. Protected and secured by a thickness of 0.
An optical wiring board of 9 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.

When the loss of all the connected optical fibers was measured, the loss was 0.4 dB including the connection loss of the optical connector.
It was below. In addition, about the produced optical wiring board, 75
When a high-temperature and high-humidity test left for 5000 hours at 90 ° C. and 90% RH and a temperature cycle test for 500 times at −40 ° C. to 75 ° C. were performed, both changes and fluctuations in optical loss were 0.2 dB.
It was as follows, and it turned out that it can fully be used as an optical connection part.

Comparative Example 1 In place of the acrylic pressure-sensitive adhesive F in Example 2, Table 1
The optical wiring board sandwiched between the pressure-sensitive adhesive sheets was produced in the same manner as in Example 2 except that the acrylic pressure-sensitive adhesive H shown in (1) was used and the film thickness was changed to 50 μm. However, when wiring the optical fiber, the stress of the optical fiber was not sufficiently relaxed, and the pressure-sensitive adhesive sheet was distorted. For this reason, the pressure-sensitive adhesive sheets to be bonded were not flat and could not be bonded to each other. When this was subjected to a high-temperature and high-humidity test in which it was left at 75 ° C. and 90% RH for 48 hours, the two pressure-sensitive adhesive sheets were separated from each other.

[0051]

As described above, in the optical connecting part of the present invention, the fixed optical fiber or the base sheet is formed by using the pressure-sensitive adhesive (adhesive) having a large stress relaxation property for the adhesive layer. Does not give stress distortion due to adhesion. Further, when the peeling force of the pressure-sensitive adhesive measured by the optical fiber peeling test method per one optical fiber core is in the range of 1 mg to 1000 mg per 1 μm of the film thickness of the adhesive layer, the two-dimensional plane is obtained. When the congested optical fiber is wired, the optical fiber is fixed without causing displacement (disruption of the wiring pattern) of the optical fiber wired on the adhesive layer. Characteristics.

[Brief description of the drawings]

FIG. 1 is a plan view of an optical fiber bundle for an optical fiber peel test.

FIG. 2 is a partially broken plan view of an example of the optical connection component of the present invention.

FIG. 3 is a cross-sectional view of the optical connection component of FIG.

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 shows a wiring pattern for evaluating collapse of a wiring pattern of an optical fiber.

[Explanation of symbols]

1, 1 ': base material, 2, 2a: resin protective layer, 3, 3': adhesive layer, 4, 4 ': optical fiber, 5: terminal part, 6: optical components such as optical connectors and optical modules, 7 ... Weir-like material.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Sukekawa 3-1 Yosoba-cho, Shizuoka City, Shizuoka Prefecture Inside the Technical Research Laboratory of Hamakawa Paper Co., Ltd. (72) Inventor Tatsushi Kobayashi 3 Yosoba Tomoe Town, Shizuoka City, Shizuoka Prefecture No. 1 Inside the Hamakawa Paper Mill Technical Research Institute Co., Ltd. (72) Inventor Koichi Arishima 3-19-2 Nishi Shinjuku, Shinjuku-ku, Tokyo Nippon Telegraph and Telephone Corporation (72) Inventor Mamoru Hirayama Nishi-Shinjuku, Shinjuku-ku, Tokyo 3-19-2 Nippon Telegraph and Telephone Corporation F term (reference) 2H001 BB15 BB19 FF07 KK16 KK17 2H036 JA04 QA01 RA31 2H038 CA52 2H046 AA02 AA05 AA21 AA31 AA41 AA61 AC21 AD22

Claims (3)

[Claims] 1. An optical connecting part, wherein a plurality of optical fibers each having an end portion for optical connection at an end thereof are two-dimensionally wired on a base material via an adhesive layer. Is made of a pressure-sensitive adhesive, and the peeling force of the pressure-sensitive adhesive per optical fiber core is 1 per 1 μm of the film thickness of the adhesive layer.
mg to 1000 mg. 2. An optical connecting part, wherein a plurality of optical fibers each having an end portion for optically connecting to an end are two-dimensionally wired by an adhesive layer and fixed and protected by a resin protective layer. The optical connection, wherein the adhesive layer is made of a pressure-sensitive adhesive, and a peeling force of the pressure-sensitive adhesive per optical fiber is 1 mg to 1000 mg per 1 μm of the film thickness of the adhesive layer. parts. 3. Two resin protective layers are overlapped via an adhesive layer, and at least one of the resin protective layers is
3. The optical connection component according to claim 2, wherein the optical fiber wired two-dimensionally by the adhesive layer is buried and fixed.