Photoelectric composite module and method of manufacturing the same

Abstract

To provide a photoelectric composite module capable of suppressing permeation and hydrolysis to a plastic optical fiber and suppressing optical loss, and to provide a method of manufacturing the same.SOLUTION: The active optical cable 1 is provided with a plastic optical fiber 20 and an optical waveguide film 33. The plastic optical fiber 20 includes a first core 23 capable of transmitting light, a first clad 24 covering the first core 23, and a first protective layer 25 covering the first clad 24. Optical waveguide film 33 includes second core 41 capable of transmitting light, and second clad 42 that covers second core 41. The first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 are bonded by an adhesive member 52 so as to enable transmission of light. The adhesive member 52 contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound. The molecular weight of the amino group-containing compound is 150 or more.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to an optoelectronic composite module and a method for manufacturing the same. [Background technology]

[0002] Conventionally, a composite module including an optical fiber and an optical waveguide (hereinafter referred to as an opto-electric composite module) has been known. The opto-electric composite module is manufactured, for example, by bonding an optical fiber and an optical waveguide together so as to enable light transmission.

[0003] For example, the following optical wiring component has been proposed as an optical-electrical composite module. That is, the optical wiring component includes a first optical fiber including a 1A fiber core portion and a 1B fiber core portion, a second optical fiber including a second fiber core portion, a third optical fiber including a third fiber core portion, and an optical waveguide. The optical fiber body of the first optical fiber is a plastic optical fiber. The optical fiber body and the optical waveguide are optically coupled via an adhesive member. An epoxy adhesive is used as the adhesive member (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent Publication No. 2021-113844 Summary of the Invention [Problem to be solved by the invention]

[0005] On the other hand, when a plastic optical fiber and an optical waveguide are optically coupled via an epoxy adhesive, depending on the type of epoxy adhesive, the epoxy adhesive may penetrate into the plastic optical fiber, causing hydrolysis of the plastic optical fiber and resulting in optical loss.

[0006] The present invention provides an optoelectronic composite module that can suppress permeation and hydrolysis of plastic optical fibers and reduce optical loss, and a method for producing the same. [Means for solving the problem]

[0007] The present invention [1] is an opto-electrical composite module comprising a plastic optical fiber and an optical waveguide, wherein the plastic optical fiber comprises a first core that enables the transmission of light, a first clad that covers the first core, and a first protective layer that covers the first clad, and the optical waveguide comprises a second core that enables the transmission of light and a second clad that covers the second core, and the first core of the plastic optical fiber and the second core of the optical waveguide are bonded together by an adhesive member to enable the transmission of light, and the adhesive member contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound, and the molecular weight of the amino group-containing compound is 150 or more.

[0008] The present invention [2] includes the optoelectronic composite module according to the above [1], in which the first protective layer contains a polycarbonate resin.

[0009] The present invention [3] includes the optoelectronic composite module according to the above [1] or [2], wherein the first clad contains a fluororesin.

[0010] The present invention [4] includes the optoelectronic composite module according to any one of the above [1] to [3], wherein the second clad contains an epoxy resin.

[0011] The present invention [5] includes the optoelectronic composite module according to any one of the above [1] to [4], wherein the second core contains an epoxy resin.

[0012] The present invention [6] includes the optoelectronic composite module according to any one of the above [1] to [5], wherein the glycidyl group-containing compound contains an epoxy resin and the amino group-containing compound contains an aliphatic polyamine.

[0013] The present invention [7] includes the photoelectric composite module according to the above [6], in which the aliphatic polyamine contains an aliphatic polyether polyamine.

[0014] The present invention [8] includes the optoelectronic composite module according to any one of the above [1] to [7], wherein the amino group-containing compound has a molecular weight of 190 or more.

[0015] The present invention [9] includes an optical-electrical composite module according to any one of the above [1] to [8], wherein the refractive index of the adhesive member is between the refractive index of the first core and the refractive index of the second core.

[0016] The present invention

[10] includes an optical-electrical composite module according to any one of the above [1] to [9], wherein the adhesive member is arranged so as to be in direct contact with the first core, the first cladding, and the first protective layer.

[0017] The present invention

[11] is a method for manufacturing an opto-electric composite module comprising a plastic optical fiber and an optical waveguide, the method comprising a bonding step of bonding the plastic optical fiber to the optical waveguide, the plastic optical fiber comprising a first core that enables light transmission, a first clad that covers the first core, and a first protective layer that covers the first clad, the optical waveguide comprising a second core that enables light transmission and a second clad that covers the second core, the bonding step ... protective layer that covers the first clad, and a second protective layer that covers the second core, the bonding step comprising a bonding step of bonding the plastic optical fiber to the optical waveguide, the plastic optical fiber comprising a first core that enables light transmission, a first protective layer that covers the first clad, and a second protective layer that covers the second core, the a mixing step of mixing the main agent and the curing agent to prepare a mixture; a filling step of filling the space between the first core and the second core with the mixture; and a curing step of curing the mixture between the first core and the second core to form an adhesive member, and bonding the first core and the second core with the adhesive member so as to enable light transmission, wherein the molecular weight of the amino group-containing compound is 150 or more.

[0018] The present invention

[12] includes the method for manufacturing an optoelectronic composite module described in the above

[11] , in which the base agent and the curing agent are mixed, and after 40 minutes at 15°C, the viscosity of the mixture of the base agent and the curing agent is 1000 cPs or more and 6000 cPs or less.

[0019] The present invention

[13] includes the method for manufacturing an optoelectronic composite module according to the above

[11] or

[12] , wherein in the bonding step, the curing temperature of the adhesive is 10°C or higher and 40°C or lower.

[0020] The present invention

[14] includes the method for producing an optoelectric composite module according to any one of the above

[11] to

[13] , wherein the adhesive is a two-component curing epoxy adhesive. [Effects of the Invention]

[0021] In the optical-electrical composite module and its manufacturing method of the present invention, the first core of the plastic optical fiber and the second core of the optical waveguide are bonded by an adhesive member so as to enable light transmission. The adhesive member contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound. In the optical-electrical composite module and its manufacturing method, the molecular weight of the amino group-containing compound is equal to or greater than the predetermined value. Therefore, the optical-electrical composite module and its manufacturing method can prevent the amino group-containing compound from penetrating the plastic optical fiber, thereby preventing hydrolysis of the plastic optical fiber. As a result, the optical-electrical composite module and its manufacturing method can reduce optical loss. [Brief explanation of the drawings]

[0022] [Figure 1] FIG. 1 is a schematic diagram of an active optical cable as an embodiment of the optical-electrical composite module of the present invention. [Figure 2] FIG. 2 is a schematic cross-sectional view of the active optical cable shown in FIG. [Figure 3] FIG. 3 is a schematic cross-sectional side view of the optical / electrical hybrid board of the active optical cable shown in FIG. [Figure 4] FIG. 4 is an electron microscope photograph showing the plastic optical fiber after bonding the plastic optical fiber to the optical waveguide film in Example 1. [Figure 5] FIG. 5 is a microscope photograph showing the bonded portion between the plastic optical fiber and the optical waveguide film in Comparative Example 1. As shown in FIG. [Figure 6] FIG. 6 is an image of the end face of the plastic optical fiber according to Reference Example 1 taken by a confocal microscope. [Figure 7] FIG. 7 is an image of the end face of the plastic optical fiber according to Reference Comparative Example 1 taken with a confocal microscope. DETAILED DESCRIPTION OF THE INVENTION

[0023] An embodiment of the present invention will be described in detail below. Note that in the following, the symbol "to" indicating a range of values ​​includes the upper and lower limits.

[0024] 1. Active Optical Cable 1, an active optical cable 1 serving as an optical-electrical composite module includes an optical cable 2 having a plastic optical fiber 20 (described later), an optical-electrical hybrid substrate 3 having an optical waveguide film 33 (described later), and an optical connector 5 having an adhesive member 52 (described later). More specifically, the active optical cable 1 is formed by connecting both longitudinal ends of one optical cable 2 to a pair (two) of optical-electrical hybrid substrates 3 via the optical connector 5. The optical cable 2, the optical-electrical hybrid substrate 3, and the optical connector 5 will be described in detail below.

[0025] (1) Optical cable 2 As shown in FIG. 2, the optical cable 2 includes a plastic optical fiber 20 and an outer jacket 29 (see dashed line) that houses the plastic optical fiber 20.

[0026] [Plastic optical fiber] The plastic optical fiber 20 includes a plastic optical fiber body 21 and a coloring material 22.

[0027] The plastic optical fiber body 21 includes a first core 23 that allows light transmission, a first clad 24 that covers the first core 23, and a first protective layer 25 that covers the first clad 24.

[0028] The first core 23 has a generally circular shape in cross section and includes the center of the plastic optical fiber body 21 in cross section.

[0029] The first core 23 is made of, for example, plastic. The material of the first core 23 is selected from the viewpoint of optical transmission efficiency. More specifically, the material of the first core 23 is fluororesin. That is, from the viewpoint of optical transmission efficiency, the first core 23 preferably contains fluororesin.

[0030] The refractive index of the first core 23 is, for example, 1.30 to 1.60, or preferably 1.45 to 1.60. The refractive index is the refractive index of light with a wavelength of 848 nm (the same applies hereinafter).

[0031] The size of the first core 23 is not particularly limited and is set depending on the purpose and application. For example, the diameter of the first core 23 is, for example, 5 to 2000 μm, or preferably 7 to 1000 μm.

[0032] The first cladding 24 has a generally circular ring shape in cross section. The first cladding 24 is disposed in contact with the outer peripheral surface of the first core 23. The first cladding 24 is also disposed between the first core 23 and the first protective layer 25.

[0033] The first cladding 24 is made of, for example, plastic. The material of the first cladding 24 is selected from the viewpoint of light transmission efficiency. More specifically, the material of the first cladding 24 is fluororesin. That is, from the viewpoint of light transmission efficiency, the first cladding 24 preferably contains fluororesin.

[0034] The refractive index of the first cladding 24 is in the range of, for example, 1.20 to 1.50, or preferably 1.25 to 1.40.

[0035] The refractive index of the first cladding 24 is smaller than the refractive index of the first core 23. The difference between the refractive index of the first core 23 and the refractive index of the first cladding 24 is in the range of, for example, 0.001 to 0.05, or preferably 0.005 to 0.02.

[0036] The size of the first cladding 24 is not particularly limited and is set depending on the purpose and application. For example, the thickness of the first cladding 24 (i.e., the difference between the outer diameter and the inner diameter) is, for example, 1 to 300 μm, or preferably 2 to 200 μm.

[0037] The first protective layer 25 has a generally circular ring shape in cross section. The first protective layer 25 is disposed in contact with the outer peripheral surface of the first cladding 24. The first protective layer 25 also forms the outer peripheral surface of the plastic optical fiber body 21.

[0038] The first protective layer 25 is made of, for example, plastic. The material of the first protective layer 25 is selected from the viewpoint of mechanical properties. More specifically, a polycarbonate resin can be used as the material of the first protective layer 25. That is, from the viewpoint of mechanical properties, the first protective layer 25 preferably contains a polycarbonate resin.

[0039] The size of the first protective layer 25 is not particularly limited and is set depending on the purpose and application. For example, the thickness of the first protective layer 25 (i.e., the difference between the outer diameter and the inner diameter) is, for example, 5 to 500 μm, or preferably 10 to 400 μm.

[0040] There are no particular limitations on the method for producing the plastic optical fiber body 21. The plastic optical fiber body 21 is produced by a known method. The diameter of the plastic optical fiber body 21 is, for example, 50 to 10,000 μm, or preferably 100 to 1,000 μm.

[0041] The coloring material 22 is a colored coating material that coats the plastic optical fiber body 21.

[0042] The coloring material 22 has a generally circular ring shape in cross section. The coloring material 22 is disposed in contact with the outer peripheral surface of the first protective layer 25. The coloring material 22 also forms the outer peripheral surface of the plastic optical fiber 20.

[0043] The coloring material 22 is made of, for example, plastic. The material of the coloring material 22 is not particularly limited and is appropriately selected depending on the purpose and application. Examples of materials for the coloring material 22 include (meth)acrylic resin and coloring agents.

[0044] There are no particular limitations on the manufacturing method of the coloring material 22. The coloring material 22 is formed on the surface of the plastic optical fiber body 21 by a known method. The thickness of the coloring material 22 (i.e., the difference between the outer diameter and the inner diameter) is, for example, 0.01 to 1000 μm, preferably 0.1 to 100 μm.

[0045] There is no particular limitation on the manufacturing method of the plastic optical fiber 20. The plastic optical fiber 20 is manufactured by a known method. There is no particular limitation on the number of plastic optical fiber bodies 21. There may be one plastic optical fiber body 21, or two or more (plural) plastic optical fiber bodies 21. FIG. 2 shows one plastic optical fiber 20.

[0046] [Outer skin] The outer cover 29 has a generally circular ring shape in cross section. More specifically, the outer cover 29 has a cylindrical shape. The plastic optical fiber 20 is housed inside the cylindrical outer cover 29.

[0047] The material of the outer cover 29 is not particularly limited, and examples thereof include known molding resins. Examples of molding resins include polyvinyl chloride, ethylene-vinyl acetate copolymer, and polycarbonate. The material of the outer cover 29 is appropriately selected depending on the purpose and application.

[0048] There are no particular limitations on the method for producing the outer jacket 29. The outer jacket 29 is produced by a known method and houses the plastic optical fiber 20. The thickness of the outer jacket 29 is in the range of, for example, 1 to 100,000 μm, or preferably 10 to 10,000 μm.

[0049] [Other materials] The optical cable 2 may further include other components. The other components are components other than the plastic optical fiber 20 and the outer sheath 29. Examples of the other components include power supply wiring, electrical signal wiring, and tensile strength fibers. The other components are appropriately selected depending on the purpose and application. The other components are housed and protected, for example, by the outer sheath 29 together with the plastic optical fiber 20.

[0050] (2) Optoelectronic hybrid board As shown in FIG. 3, the optoelectronic hybrid board 3 includes, in order from one side to the other in the thickness direction, a metal support layer 31, a flexible wiring board 32, and an optical waveguide film 33 as an optical waveguide.

[0051] [Metal support layer] The metal support layer 31 is disposed in the middle in the thickness direction of the optoelectronic hybrid substrate 3. That is, the metal support layer 31 is disposed between the flexible wiring board 32 and the optical waveguide film 33. More specifically, the metal support layer 31 is in contact with the other side in the thickness direction of the base insulating layer 34 (described later).

[0052] The metal support layer 31 has a through-hole 38 that penetrates the metal support layer 31 in the thickness direction. The through-hole 38 is formed, for example, so as to face a light entrance / exit port of a photoelectric conversion element 39 (described later).

[0053] Examples of materials for the metal support layer 31 include metals. More specific examples of metals include 42 alloy, aluminum, copper-beryllium, phosphor bronze, copper, silver, and aluminum, and preferably stainless steel. The thickness of the metal support layer 31 is appropriately selected depending on the purpose and application.

[0054] [Flexible wiring board] The flexible wiring board 32 is disposed on one side in the thickness direction of the metal support layer 31. The flexible wiring board 32 includes a base insulating layer , a conductor layer 35, and a cover insulating layer .

[0055] The shape of the base insulating layer 34 in a plan view is the same as the shape of the flexible wiring board 32 in a plan view. Examples of materials for the base insulating layer 34 include insulating materials. Examples of insulating materials include polyimide. The thickness of the base insulating layer 34 is set appropriately depending on the purpose and application.

[0056] The conductor layer 35 is disposed on one side (one surface) in the thickness direction of the insulating base layer 34. Examples of materials for the conductor layer 35 include known conductor materials. Examples of conductor materials include copper. The thickness of the conductor layer 35 is appropriately selected depending on the purpose and application.

[0057] The cover insulating layer 36 is disposed on one thickness-wise side of the conductor layer 35. The cover insulating layer 36 is in contact with one thickness-wise surface of the base insulating layer 34 around the conductor layer 35 so as to cover the conductor layer 35. The material of the cover insulating layer 36 is the same as the material of the base insulating layer 34. The thickness of the cover insulating layer 36 is selected appropriately depending on the purpose and application.

[0058] [Optical waveguide film] The optical waveguide film 33 is disposed on the other thickness-wise side (other surface) of the metal support layer 31. The optical waveguide film 33 includes a second core 41 that enables light transmission, and a second clad 42 that covers the second core 41. The second clad 42 includes a second underclad 43 and a second overclad 44. Hereinafter, the second underclad 43 and the second overclad 44 may be collectively referred to as the second clad 42.

[0059] The second underclad 43 is disposed so as to contact the other surface in the thickness direction of the base insulating layer 34 of the flexible wiring board 32. The second underclad 43 is also disposed so as to contact the other surface in the thickness direction of the metal support layer 31.

[0060] Examples of materials for the second underclad 43 include photosensitive resins. Examples of photosensitive resins include epoxy resins, acrylic resins, and silicone resins. These can be used alone or in combination of two or more. The material for the second underclad 43 is selected from the perspective of optical transmission efficiency. A preferred example of the material for the second underclad 43 is epoxy resin. That is, from the perspective of optical transmission efficiency, the second underclad 43 preferably contains epoxy resin.

[0061] The refractive index of the second undercladding 43 is, for example, 1.30 to 1.60, or preferably 1.35 to 1.58. Preferably, the difference between the refractive index of the second undercladding 43 and the refractive index of the first cladding 24 is 0.25 or less.

[0062] The size of the second underclad 43 is not particularly limited and is set depending on the purpose and application. For example, the thickness of the second underclad 43 is, for example, 1 to 300 μm, or preferably 5 to 200 μm.

[0063] The second core 41 is disposed on the other surface in the thickness direction of the second underclad 43. The second core 41 is formed in a pattern narrower than the second underclad 43.

[0064] A mirror 45 is formed in the second core 41. The mirror 45 faces the through-hole 38 in the thickness direction. That is, the mirror 45 faces a light inlet / outlet (not shown) of a photoelectric conversion element 39 (described later) in the thickness direction.

[0065] The material of the second core 41 may be, for example, the above-mentioned photosensitive resin. The material of the second core 41 is selected from the viewpoint of optical transmission efficiency. A preferable material of the second core 41 is epoxy resin. That is, from the viewpoint of optical transmission efficiency, the second core 41 preferably contains epoxy resin.

[0066] The second core 41 has a refractive index of, for example, 1.30 to 1.65, or preferably 1.35 to 1.60. Preferably, the difference between the refractive index of the second core 41 and the refractive index of the first core 23 is 0.25 or less.

[0067] There are no particular limitations on the size of the second core 41, and it is set depending on the purpose and application. For example, the thickness of the second core 41 is in the range of, for example, 1 to 500 μm, or preferably 5 to 100 μm.

[0068] In a plan view, the second overclad 44 is disposed at the same position as the second underclad 43. The second overclad 44 is disposed on the other surface in the thickness direction of the second underclad 43 so as to cover the other surface in the thickness direction and the side surface of the second core 41. In other words, the second underclad 43 and the second overclad 44 cover the second core 41.

[0069] The material of the second overclad 44 may be, for example, the above-mentioned photosensitive resin. The material of the second overclad 44 is selected from the viewpoint of optical transmission efficiency. A preferable material of the second overclad 44 is epoxy resin. That is, from the viewpoint of optical transmission efficiency, the second overclad 44 preferably contains epoxy resin.

[0070] The material of the second overclad 44 is preferably the same as the material of the second underclad 43. That is, the second clad 42 (i.e., both the second overclad 44 and the second underclad 43) preferably contains an epoxy resin.

[0071] The refractive index of the second overclad 44 is, for example, 1.30 to 1.65, or preferably 1.35 to 1.60. Preferably, the difference between the refractive index of the second overclad 44 and the refractive index of the first clad 24 is 0.25 or less. Preferably, the difference between the refractive index of the second overclad 44 and the refractive index of the second underclad 43 is 0.05 or less. Preferably, the refractive index of the second overclad 44 and the refractive index of the second underclad 43 are the same. Hereinafter, the refractive index of the second underclad 43 and the refractive index of the second overclad 44 will be collectively referred to as the refractive index of the second clad 42.

[0072] The refractive index of the second cladding 42 is smaller than the refractive index of the second core 41. The difference between the refractive index of the second core 41 and the refractive index of the second cladding 42 is in the range of, for example, 0.001 to 0.05, or preferably 0.005 to 0.04.

[0073] There are no particular limitations on the method for producing the optical waveguide film 33. The optical waveguide film 33 is produced by a known method. The total thickness of the optical waveguide film 33 is appropriately selected depending on the purpose and application.

[0074] [Photoelectric conversion element] The optoelectronic hybrid substrate 3 further includes an optoelectronic conversion element 39. The optoelectronic conversion element 39 is an element capable of converting an optical signal into an electrical signal and / or an electrical signal into an optical signal. The optoelectronic conversion element 39 is mounted on the flexible wiring board 32 via a known joining member 37.

[0075] More specifically, the photoelectric conversion element 39 is electrically connected to the conductor layer 35 so that the light inlet / outlet (not shown) of the photoelectric conversion element 39 faces the through-hole 38 of the metal support layer 31 in the thickness direction. Also, the photoelectric conversion element 39 is electrically connected to the conductor layer 35 so that the light inlet / outlet (not shown) of the photoelectric conversion element 39 faces the mirror 45 of the optical waveguide film 33 in the thickness direction.

[0076] (3) Optical connector As shown in FIG. 3, the optical connector 5 includes a housing 51 and an adhesive member 52 (see the enlarged view of FIG. 3) filled in the housing 51.

[0077] The housing 51 has an arbitrary shape and forms the external appearance of the optical connector 5. The material of the housing 51 is not particularly limited, and examples thereof include known molding resins.

[0078] The adhesive member 52 contains a reaction product of a glycidyl group-containing compound (described later) and an amino group-containing compound (described later). More specifically, the adhesive member 52 is a cured product of an adhesive containing a glycidyl group-containing compound (described later) and an amino group-containing compound (described later).

[0079] Examples of adhesives include two-component curing adhesives and one-component curing adhesives, and preferably two-component curing adhesives. Two-component curing adhesives include a base agent and a curing agent. The base agent and the curing agent are prepared separately and mixed at the time of use. Examples of two-component curing adhesives include two-component curing epoxy adhesives. That is, the adhesive is preferably a two-component curing epoxy adhesive.

[0080] In the two-component curing epoxy adhesive, the main agent contains a glycidyl group-containing compound.

[0081] The glycidyl group-containing compound is an organic compound having one or more glycidyl groups in one molecule. The number of glycidyl groups in one molecule of the glycidyl group-containing compound is, for example, 1 to 10, preferably 2 to 6, more preferably 2 to 4, even more preferably 2 to 3, and particularly preferably 2.

[0082] Examples of the glycidyl group-containing compound include epoxy resins. In other words, the glycidyl group-containing compound contains, for example, an epoxy resin. The glycidyl group-containing compound is preferably an epoxy resin.

[0083] Examples of epoxy resins include bifunctional epoxy resins and trifunctional or higher functional epoxy resins. Bifunctional epoxy resins are epoxy resins having two epoxy groups per molecule. Examples of functional epoxy resins include bisphenol A epoxy resins, bisphenol F epoxy resins, modified bisphenol A epoxy resins, modified bisphenol F epoxy resins, and biphenyl epoxy resins. Trifunctional or higher functional epoxy resins are epoxy resins having three or more epoxy groups per molecule. Examples of multifunctional epoxy resins include phenol novolac epoxy resins, cresol novolac epoxy resins, trishydroxyphenylmethane epoxy resins, tetraphenylolethane epoxy resins, and dicyclopentadiene epoxy resins. Epoxy resins can be used alone or in combination of two or more. Preferably, the epoxy resin is a bifunctional epoxy resin, more preferably a bisphenol F epoxy resin. That is, the adhesive preferably contains a bifunctional epoxy resin, more preferably a bisphenol F epoxy resin.

[0084] The glycidyl group equivalent (ie, epoxy equivalent) of the glycidyl group-containing compound is in the range of, for example, 100-1000, or preferably 150-500.

[0085] The base material may contain a solvent as needed. The solvent is not particularly limited and may be appropriately selected depending on the purpose and application. The content of the solvent may also be appropriately selected depending on the purpose and application.

[0086] In the two-component curing epoxy adhesive, the curing agent contains an amino group-containing compound.

[0087] An amino group-containing compound is an organic compound having one or more primary amino groups and / or secondary amino groups in one molecule. Hereinafter, the primary amino group and / or secondary amino group will be referred to as "amino group." The number of amino groups in one molecule of the amino group-containing compound is, for example, 1 to 10, preferably 2 to 6, more preferably 2 to 4, even more preferably 2 to 3, and particularly preferably 2.

[0088] In the curing agent, the molecular weight of the amino group-containing compound is a predetermined value or more. More specifically, the molecular weight of the amino group-containing compound is 150 or more, preferably 170 or more, more preferably 180 or more, and even more preferably 190 or more. The molecular weight of the amino group-containing compound is 19,000 or less, preferably 10,000 or less, more preferably 5,000 or less, and even more preferably 1,900 or less. That is, the molecular weight of the amino group-containing compound is 150 or more and 19,000 or less, preferably 170 or more and 10,000 or less, more preferably 180 or more and 5,000 or less, and even more preferably 190 or more and 1,900 or less. The molecular weight of the amino group-containing compound is calculated based on the molecular structure.

[0089] More specifically, examples of amino group-containing compounds having the above molecular weight include aliphatic polyamines, aromatic polyamines, and heterocyclic polyamines. Examples of aliphatic polyamines include tetraethylenepentamine, pentaethylenehexamine, and aliphatic polyether polyamines. Examples of aliphatic polyether polyamines include polyoxyethylene polyamines and polyoxypropylene polyamines. Examples of aromatic polyamines include diethyltoluene diamine and halogenated diethyltoluene diamines. Examples of heterocyclic polyamines include 1-(2-dimethylaminoethyl)-4-methylpiperazine. These compounds can be used alone or in combination of two or more. Examples of amino group-containing compounds include preferably aliphatic polyamines, more preferably aliphatic polyether polyamines, and even more preferably polyoxypropylene polyamines. In other words, the amino group-containing compound preferably contains an aliphatic polyamine, more preferably contains an aliphatic polyether polyamine, and particularly preferably contains polyoxypropylene polyamine.

[0090] The curing agent may contain a solvent as needed. The solvent is not particularly limited and is appropriately selected depending on the purpose and application. The content of the solvent is also appropriately selected depending on the purpose and application.

[0091] The adhesive member 52 is formed by mixing a base agent containing a glycidyl group-containing compound with a curing agent containing an amino group-containing compound and allowing them to react with each other. In other words, the reaction product of the glycidyl group-containing compound and the amino group-containing compound is used as the adhesive member 52. Details of the method for producing the adhesive member 52 will be described later.

[0092] In the optical connector 5, the refractive index of the adhesive member 52 is between the refractive index of the first core 23 of the plastic optical fiber 2 and the refractive index of the second core 41 of the optical waveguide film 33. It is particularly preferable that the difference between the refractive index of the adhesive member 52 and the refractive index of the first core 23 is 0.05 or less, and the difference between the refractive index of the adhesive member 52 and the refractive index of the second core 41 is 0.05 or less.

[0093] More specifically, the refractive index of the adhesive member 52 is, for example, 1.30 to 1.65, preferably 1.35 to 1.60, and more preferably 1.40 to 1.59.

[0094] The adhesive member 52 is disposed within the housing 51 as shown enlarged in FIG.

[0095] The adhesive member 52 is disposed so as to be in direct contact with the first core 23 , the first cladding 24 and the first protective layer 25 of the plastic optical fiber 20 , and fixes the plastic optical fiber 20 within the housing 51 .

[0096] Adhesive member 52 is disposed so as to be in direct contact with second core 41 and second clad 42 of optical waveguide film 33 , and fixes optical waveguide film 33 within housing 51 .

[0097] As a result, the adhesive member 52 bonds the first core 23 of the plastic optical fiber 2 and the second core 41 of the optical waveguide film 33 together so as to enable light transmission.

[0098] 1, for example, two (a pair) of the optical connectors 5 are provided for one active optical cable 1. One optical connector 5 is interposed between one longitudinal end of the optical cable 2 and one optoelectronic hybrid substrate 3. That is, one longitudinal end of the first core 23 and the second core 41 of one optoelectronic hybrid substrate 3 are bonded by an adhesive member 52 so as to enable light transmission. The other optical connector 5 is interposed between the other longitudinal end of the optical cable 2 and the other optoelectronic hybrid substrate 3. That is, the other longitudinal end of the first core 23 and the second core 41 of the other optoelectronic hybrid substrate 3 are bonded by an adhesive member 52 so as to enable light transmission.

[0099] 2. Active Optical Cable Manufacturing Method The active optical cable 1 is manufactured, for example, by the following method.

[0100] That is, in this method, the optical cable 2 having the plastic optical fiber 20 and the optoelectronic hybrid board 3 having the optical waveguide film 33 are prepared, and the plastic optical fiber 20 and the optical waveguide film 33 are bonded together (bonding process).

[0101] More specifically, in this method, first, an adhesive is prepared (preparation step). The adhesive may be the above-mentioned two-component curing adhesive, and preferably the above-mentioned two-component curing epoxy adhesive. That is, the adhesive preferably comprises a base agent containing the above-mentioned glycidyl group-containing compound and a curing agent containing the above-mentioned amino group-containing compound.

[0102] Next, in this method, the base resin and the cured product are mixed to prepare a mixture (mixing step).

[0103] The mixing ratio of the base agent and the curing agent is adjusted, for example, based on the equivalent ratio. More specifically, the equivalent ratio of the amino group of the amino group-containing compound to the glycidyl group of the glycidyl group-containing compound (amino group / epoxy group) is, for example, 0.5 to 10, preferably 0.5 to 5.

[0104] The mixing ratio of the base agent and the curing agent is adjusted, for example, based on the viscosity after mixing. More specifically, after mixing the base agent and the curing agent, the viscosity of the mixture of the base agent and the curing agent is, for example, 1000 cPs or more and 6000 cPs or less, preferably 1500 cPs or more and 3500 cPs or less, 40 minutes later at 15°C. The viscosity is measured in accordance with the examples described later.

[0105] Next, in this method, the adhesive mixture is filled between the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 (filling step).

[0106] More specifically, in this method, as shown in Fig. 3, the housing 51 of the optical connector 5 is filled with an adhesive mixture. The amount of filling is not particularly limited and is selected appropriately depending on the purpose and application.

[0107] Next, in this method, the longitudinal end of the plastic optical fiber 20 is inserted into the housing 51 on one longitudinal side of the optical cable 2, and the end face of the first core 23 of the plastic optical fiber 20 is brought into direct contact with the adhesive mixture.

[0108] In this method, the longitudinal end of one of the optoelectronic hybrid boards 3 is inserted into the housing 51, and the end face of the second core 41 of the optical waveguide film 33 is brought into direct contact with the adhesive mixture.

[0109] Then, on one longitudinal side of the optical cable 2, the end face of the first core 23 of the plastic optical fiber 20 and the longitudinal end face of the second core 41 of the optical waveguide film 33 are opposed to each other via an adhesive mixture.

[0110] By this method, the adhesive mixture can be filled between the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 .

[0111] Next, in this method, the adhesive mixture is cured between the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 (curing step).

[0112] The method for curing the adhesive mixture is not particularly limited, and for example, the adhesive mixture is left standing at a predetermined curing temperature for a predetermined curing time.

[0113] For example, the curing temperature of the adhesive is relatively low from the viewpoint of suppressing thermal shrinkage of the plastic optical fiber 20. More specifically, the curing temperature of the adhesive is, for example, 10°C or higher and 40°C or lower, preferably 20°C or higher and 30°C or lower, under normal pressure.

[0114] Furthermore, the curing time of the adhesive is relatively short from the viewpoint of suppressing thermal shrinkage of the plastic optical fiber 20. More specifically, the curing time of the adhesive is, for example, 48 to 96 hours, preferably 72 to 96 hours, under normal pressure.

[0115] Then, by hardening the adhesive mixture, adhesive member 52 is formed between first core 23 of plastic optical fiber 20 and second core 41 of optical waveguide film 33.

[0116] More specifically, a glycidyl group-containing compound contained in the base reacts with an amino group-containing compound contained in the curing agent. As a result, a reaction product of the glycidyl group-containing compound and the amino group-containing compound is obtained. The reaction product of the glycidyl group-containing compound and the amino group-containing compound is a cured resin that can transmit light. Therefore, the reaction product of the glycidyl group-containing compound and the amino group-containing compound is used as the adhesive member 52.

[0117] That is, on one longitudinal side of the optical cable 2, the longitudinal end face of the first core 23 of the plastic optical fiber 20 and the longitudinal end face of the second core 41 of the optical waveguide film 33 are bonded together by an adhesive member 52 so as to enable light transmission.

[0118] Preferably, on one longitudinal side of the optical cable 2, the first core 23, the first clad 24 and the first protective layer 25 of the plastic optical fiber 20 and the second core 41 and the second clad 42 of the optical waveguide film 33 are bonded together by an adhesive member 52 so as to enable light transmission.

[0119] Also, on the other longitudinal side of the optical cable 2, the plastic optical fiber 20 and the optical waveguide film 33 are bonded together in the same manner as above.

[0120] That is, on the other longitudinal side of the optical cable 2, the longitudinal end face of the first core 23 of the plastic optical fiber 20 and the longitudinal end face of the second core 41 of the optical waveguide film 33 are bonded together by the adhesive member 52 so as to enable light transmission.

[0121] Preferably, on the other longitudinal side of the optical cable 2, the first core 23, the first clad 24 and the first protective layer 25 of the plastic optical fiber 20 and the second core 41 and the second clad 42 of the optical waveguide film 33 are also bonded by the adhesive member 52 so as to enable light transmission.

[0122] As a result, as shown in Figure 1, two (a pair) of optical-electrical hybrid boards 3 can be connected to each of the longitudinal ends of a single optical cable 2 via optical connectors 5, thereby obtaining an active optical cable 1.

[0123] Such an active optical cable 1 allows optical signals to be transmitted between a pair of photoelectric hybrid boards 3.

[0124] 3. Effects In the active optical cable 1 and its manufacturing method, the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 are bonded by an adhesive member 52 to enable light transmission. The adhesive member 52 contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound. In the active optical cable 1 and its manufacturing method, the amino group-containing compound has a molecular weight equal to or greater than the predetermined value. Therefore, the active optical cable 1 and its manufacturing method can prevent the amino group-containing compound from penetrating the plastic optical fiber, thereby preventing hydrolysis of the plastic optical fiber 20. As a result, the active optical cable 1 and its manufacturing method can reduce optical loss.

[0125] More specifically, when the adhesive member 52 contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound, and the molecular weight of the amino group-containing compound is less than a predetermined value, the amino group-containing compound may penetrate into the plastic optical fiber 20. For example, when 2-ethyl-4-methylimidazole (molecular weight 110) is used as the amino group-containing compound, the amino group-containing compound may penetrate into the first protective layer 25 of the plastic optical fiber 20, causing the first protective layer 25 to swell and hydrolyze. As a result, the dimensions of the first protective layer 25 may change, creating a gap between the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33, which may result in optical loss.

[0126] In contrast, if the molecular weight of the amino group-containing compound is equal to or greater than a predetermined value, the amino group-containing compound can be prevented from penetrating into the first protective layer 25 of the plastic optical fiber 20, thereby suppressing hydrolysis of the first protective layer 25. As a result, the active optical cable 1 and its manufacturing method described above can suppress dimensional changes in the first protective layer 25, thereby suppressing optical loss.

[0127] Furthermore, if the molecular weight of the amino group-containing compound is equal to or greater than a predetermined value, it is possible to suppress the penetration of the amino group-containing compound into the coloring material 22 and also to suppress hydrolysis of the coloring material 22. As a result, the active optical cable 1 and its manufacturing method described above can achieve excellent connection reliability.

[0128] Furthermore, the active optical cable 1 and its manufacturing method described above use an adhesive and adhesive member 52. In this case, the plastic optical fiber 20 and the optical waveguide film 33 can be fixed relatively firmly compared to when a known matching gel is used instead of an adhesive. This makes it possible to suppress thermal shrinkage of the plastic optical fiber 20 and / or the optical waveguide film 33. As a result, it is possible to suppress misalignment of the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33.

[0129] In the active optical cable 1 and its manufacturing method, if the first cladding 24 contains a fluororesin, excellent optical transmission efficiency can be obtained. In the active optical cable 1 and its manufacturing method, if the first protective layer 25 contains a polycarbonate resin, excellent mechanical properties can be obtained.

[0130] Furthermore, in the above-described active optical cable 1 and its manufacturing method, if the second core 41 contains an epoxy resin, excellent optical transmission efficiency can be obtained. Furthermore, in the above-described active optical cable 1 and its manufacturing method, if the second clad 42 contains an epoxy resin, excellent optical transmission efficiency can be obtained.

[0131] Furthermore, in the above-described active optical cable 1 and its manufacturing method, if the adhesive is a two-component curing epoxy adhesive, the active optical cable 1 can be manufactured efficiently.

[0132] Furthermore, in the above-mentioned active optical cable 1 and its manufacturing method, if the glycidyl group-containing compound contains an epoxy resin and the amino group-containing compound contains an aliphatic polyamine, the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 can be more effectively bonded together and optical loss can be suppressed.

[0133] Furthermore, in the above-mentioned active optical cable 1 and its manufacturing method, if the glycidyl group-containing compound contains an aliphatic polyamine and the aliphatic polyether polyamine, the first core 23 of the plastic optical fiber 20 and the second core 41 of the optical waveguide film 33 can be more effectively bonded together, and optical loss can be suppressed.

[0134] Furthermore, in the active optical cable 1 and the manufacturing method thereof, if the refractive index of the adhesive member 52 is between the refractive index of the first core 23 and the refractive index of the second core 41, excellent optical transmission efficiency can be obtained.

[0135] Furthermore, in the above-mentioned active optical cable 1 and its manufacturing method, if the adhesive member 52 is arranged so as to be in direct contact with the first core 23, the first cladding 24 and the first protective layer 25, excellent optical transmission efficiency can be obtained and optical loss can be suppressed.

[0136] Furthermore, in the active optical cable 1 and its manufacturing method described above, if the viscosity of the mixture of the base agent and the curing agent at 15°C is within a predetermined range, the adhesive can be filled into the housing 51 of the optical connector 5 in a relatively low-temperature environment. Use of such an adhesive can prevent the adhesive from being heated to a relatively high temperature, and can also prevent the plastic optical fiber 20 from being heated due to heating of the adhesive. As a result, damage to the plastic optical fiber 20 due to heat can be prevented.

[0137] Furthermore, in the active optical cable 1 and its manufacturing method, if the curing temperature of the adhesive is within the above-mentioned predetermined range, the adhesive can be cured in a relatively low-temperature environment. By using such an adhesive, it is possible to prevent the adhesive from being heated to a relatively high temperature, and also to prevent the plastic optical fiber 20 from being heated due to the heating of the adhesive. As a result, it is possible to prevent damage to the plastic optical fiber 20 due to heat.

[0138] 4. Variations In the above description, an active optical cable is used as an example of an optical-electrical composite module, but the optical-electrical composite module is not limited to this. Examples of optical-electrical composite modules include optical transceivers, servers in data centers, and optical switches in data centers. [Example]

[0139] The present invention will be described in more detail below with reference to examples and comparative examples. It should be noted that the present invention is in no way limited to these examples and comparative examples. The specific numerical values ​​of the blending ratios (content ratios), physical property values, parameters, etc. used in the following description can be replaced with the corresponding upper limit values ​​(numeric values ​​defined as "equal to or less than" or "less than") or lower limit values ​​(numeric values ​​defined as "equal to or greater than" or "exceeding") of the blending ratios (content ratios), physical property values, parameters, etc. described in the "Description of the Invention" above.

[0140] 1. Preparation Preparation example 1 (adhesive 1) The following base resin and curing agent were prepared to obtain a two-component curing adhesive (hereinafter referred to as adhesive 1). Base resin: bisphenol F epoxy resin, functional group number 2 Curing agent: Polyoxypropylene polyamine, molecular weight calculated from molecular structure is 190 or more, functional group number 2

[0141] The polyoxypropylene polyamine will be described in detail below. Structural formula: H2NCH(CH3)CH2O(CH(CH3)CH2O) n CH2CH(CH3)NH 2、 Here, n represents an integer of 1 or more. When n is 1, the molecular weight calculated from the molecular structure is 190.23

[0142] Preparation example 2 (adhesive 2) The following base resin and curing agent were prepared to obtain a two-component curing adhesive (hereinafter referred to as adhesive 2). Main component: bisphenol F epoxy resin, functional group number 2, Hardener: 2-ethyl-4-methylimidazole, molecular weight 110, functionality 1

[0143] Preparation example 3 (matching gel) The following matching gels were prepared:

[0144] Refractive index matching gel, part number G608N3, a composition containing the reaction product of dichloro(dimethyl)silane and silicon dioxide, and 2,6-di-tert-butyl-p-cresol (Nye Lubricants)

[0145] 2. Hydrolysis of the first protective layer Example 1 A plastic optical fiber was prepared. The plastic optical fiber had a first core made of fluororesin, a first cladding made of fluororesin, a first protective layer made of polycarbonate resin, and a coloring material made of (meth)acrylic resin and a coloring agent.

[0146] An optical waveguide film was prepared, which had a second core made of an epoxy resin, and a second underclad and a second overclad made of an epoxy resin.

[0147] The main agent and curing agent of adhesive 1 were mixed to prepare the mixture of adhesive 1. The main agent and curing agent were mixed based on an equivalence ratio. Specifically, the equivalence ratio of the amino groups of the curing agent to the epoxy groups of the main agent (amino groups / epoxy groups) was 1.0.

[0148] Furthermore, the viscosity of the mixture of the base agent and curing agent was 1000 to 6000 cPs after 40 minutes from mixing the base agent and curing agent at 15° C. The viscosity was measured under the following conditions (same below).

[0149] B-type viscometer (Brookfield), rotor No. RV-3, rotation speed 100 rpm

[0150] Then, the adhesive 1 mixture was filled between the end face of the plastic optical fiber and the end face of the optical waveguide film, and the mixture was cured at 20°C for 72 hours to form a cured product (adhesive member). In this way, the plastic optical fiber and the optical waveguide film were bonded together.

[0151] After bonding, the plastic optical fiber was removed and observed under an electron microscope. As a result, as shown in Figure 4, no depression in the first core of the plastic optical fiber resulting from hydrolysis of the first protective layer was confirmed. Therefore, it was inferred that no void (see Figure 5) was formed between the first core of the plastic optical fiber and the second core of the optical waveguide film when the plastic optical fiber and the optical waveguide film were bonded together.

[0152] Comparative Example 1 Adhesive 2 was used in place of Adhesive 1. Except for the above, the plastic optical fiber and the optical waveguide film were connected in the same manner as in Example 1.

[0153] The base agent and curing agent of adhesive 2 were mixed, and after 40 minutes at 15°C, the viscosity of the mixture of the base agent and curing agent was 1000 to 6000 cPs.

[0154] The bonded area between the plastic optical fiber and the optical waveguide film was observed using a microscope (product number VHX-8000, manufactured by Keyence). As a result, swelling due to hydrolysis was confirmed in the first protective layer of the plastic optical fiber. In addition, a gap was confirmed between the first core of the plastic optical fiber and the second core of the optical waveguide film. A photograph of the bonded area between the plastic optical fiber and the optical waveguide film is shown in Figure 5.

[0155] 3. Hydrolysis of coloring materials Reference Example 1 A plastic optical fiber was prepared in the same manner as in Example 1. Also, a mixture of adhesive 1 was prepared in the same manner as in Example 1. At the end edge of the plastic optical fiber, the end face of the coloring material and the end face of the first core were flush with each other.

[0156] Next, the LC ferrule was filled with the mixture of adhesive 1. Next, a plastic optical fiber was inserted into the LC ferrule, and the end face of the plastic optical fiber was brought into contact with the mixture of adhesive 1. Next, the LC ferrule and the plastic optical fiber were left to stand for one week under conditions of 60°C and 85% RH.

[0157] The plastic optical fiber was then removed. The end face of the plastic optical fiber was then observed using a confocal microscope (product name: OPTELICS HYBRID, manufactured by Lasertec). As a result, it was confirmed that the coloring material at the end of the plastic optical fiber was slightly raised relative to the first core.

[0158] The height of the protrusion of the coloring material was measured using a confocal microscope (product name: OPTELICS HYBRID, manufactured by Lasertec). As a result, the height of the protrusion of the coloring material was found to be approximately 2.5 μm. Figure 6 shows an image of the end face of the plastic optical fiber according to Reference Example 1 taken with a confocal microscope.

[0159] Reference Comparative Example 1 Adhesive 2 was used instead of Adhesive 1. Except for the above, a plastic optical fiber was brought into contact with the mixture of Adhesive 2 in the same manner as in Reference Example 1, and the end face of the plastic optical fiber was observed. As a result, it was confirmed that the coloring material was significantly raised relative to the first core. The height of the raised coloring material was approximately 30 μm. FIG. 7 shows an image of the end face of the plastic optical fiber according to Reference Comparative Example 1 taken with a confocal microscope.

[0160] 4.Compare with matching gel Reference Example 2 A plastic optical fiber was prepared in the same manner as in Example 1. Also, a mixture of adhesive 1 was prepared in the same manner as in Example 1.

[0161] Next, the mixture of adhesive 1 was applied to the end face of a plastic optical fiber, and the plastic optical fiber was left standing at 70°C. After 14 days, the end face of the plastic optical fiber was observed using a microscope (product number VHX-8000, manufactured by Keyence Corporation). As a result, it was confirmed that the end face of the first core, the end face of the first cladding, and the end face of the first protective layer of the plastic optical fiber were all flush with each other.

[0162] Reference Comparative Example 2 The matching gel of Preparation Example 3 was used instead of Adhesive 1. Except for the above, the plastic optical fiber was brought into contact with the matching gel in the same manner as Reference Example 2, and after leaving it to stand, the end face of the plastic optical fiber was observed. As a result, it was confirmed that the end face of the first core and the end face of the first cladding of the plastic optical fiber were recessed relative to the end face of the first protective layer. The depth of the recess was approximately 100 μm. [Explanation of symbols]

[0163] 1 active optical cable 2 Optical Cable 3 Optoelectronic mixed board 5 Optical Connector 20 Plastic Optical Fiber 21 Plastic optical fiber body 22 Coloring materials 23 cores 24 Clad 25 Protective layer 29 Hull 30 Optical waveguide film 31 Metal support layer 32 Flexible wiring board 33 Optical waveguide film 34 Base insulation layer 35 Conductor layer 36 Cover insulation layer 37 Joint materials 38 Through Hole 39 Photoelectric conversion element 41 cores 42 Clad 43 Underclad 44 Overclad 45 Mirror 51 Case 52 Adhesive material

Claims

1. An optical / electrical composite module comprising a plastic optical fiber and an optical waveguide, The plastic optical fiber is a first core that allows light to be transmitted; a first clad that covers the first core; and a first protective layer that covers the first clad; The optical waveguide is a second core that allows light to be transmitted; and a second clad that covers the second core; the first core of the plastic optical fiber and the second core of the optical waveguide are bonded together by an adhesive member so as to enable light transmission; the adhesive member contains a reaction product of a glycidyl group-containing compound and an amino group-containing compound, The amino group-containing compound has a molecular weight of 150 or more.

2. The optical / electrical composite module according to claim 1 , wherein the first protective layer contains a polycarbonate resin.

3. The optical / electrical composite module according to claim 1 , wherein the first clad contains a fluororesin.

4. The optical-electrical composite module according to claim 1 , wherein the second clad contains an epoxy resin.

5. The optical-electrical composite module according to claim 1 , wherein the second core contains an epoxy resin.

6. the glycidyl group-containing compound contains an epoxy resin, The optoelectronic composite module according to claim 1 , wherein the amino group-containing compound contains an aliphatic polyamine.

7. The optoelectronic composite module according to claim 6 , wherein the aliphatic polyamine comprises an aliphatic polyether polyamine.

8. 2. The optoelectronic composite module according to claim 1, wherein the amino group-containing compound has a molecular weight of 190 or more.

9. The optical-electrical composite module according to claim 1 , wherein the refractive index of the adhesive member is between the refractive index of the first core and the refractive index of the second core.

10. The optical-electrical composite module according to claim 1 , wherein the adhesive member is disposed so as to be in direct contact with the first core, the first cladding, and the first protective layer.

11. A method for manufacturing an optical / electrical composite module including a plastic optical fiber and an optical waveguide, comprising: The method includes a bonding step of bonding a plastic optical fiber and an optical waveguide, The plastic optical fiber is a first core that allows light to be transmitted; a first clad that covers the first core; and a first protective layer that covers the first clad; The optical waveguide is a second core that allows light to be transmitted; and a second clad that covers the second core; The bonding step includes: a preparation step of preparing an adhesive comprising a base agent containing a glycidyl group-containing compound and a curing agent containing an amino group-containing compound; a mixing step of mixing the base agent and the curing agent to prepare a mixture; a filling step of filling the mixture between the first core and the second core; a curing step of forming an adhesive member between the first core and the second core by curing the mixture, and bonding the first core and the second core with the adhesive member so as to enable light transmission; Equipped with The method for producing an optoelectronic composite module, wherein the amino group-containing compound has a molecular weight of 150 or more.

12. The base material and the curing agent were mixed, and after 40 minutes at 15°C, The method for manufacturing an optoelectronic composite module according to claim 11, wherein the viscosity of the mixture of the base agent and the curing agent is 1000 cPs or more and 6000 cPs or less.

13. The method for manufacturing an optoelectronic composite module according to claim 11, wherein the adhesive is cured at a temperature of 10° C. or higher and 40° C. or lower in the bonding step.

14. The method for manufacturing an optoelectronic composite module according to claim 11, wherein the adhesive is a two-component curing epoxy adhesive.

Images