JP2011089127A - Resin composition for forming light guide and method of manufacturing the same, and light guide using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide: a resin composition for forming a light guide, excellent in thick film forming property, curability, heat resistance and the like; a method of manufacturing the same; and a light guide using the same. <P>SOLUTION: The resin composition for forming a light guide comprises a tris-oxetane ether compound and a compound containing an epoxy group or a vinyl ether group. The light guide comprises substrate 1 and clad layer 2 formed on the substrate 1, and core part 3 which propagates a light signal in a specified pattern is formed in the clad layer 2, and at least either one of the clad layer 2 and the core part 3 is formed with the resin composition for forming a light guide. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

The present invention relates to a resin composition for forming an optical waveguide containing a trisoxetane ether compound having an oxetane ring capable of cationic polymerization, a method for producing the same, and an optical waveguide using the same. Specifically, the compound optical waveguide using (or a resin composition) is, heat resistance, mechanical properties, low water absorption, coating excellent in flatness and adhesion, etc. optical waveguide forming resin composition and their preparation And an optical waveguide using the same.

  Oxetane compounds are recently attracting attention as monomers capable of photoinitiated cationic polymerization or curing, and many monofunctional and polyfunctional oxetane compounds have been developed, and various methods for synthesizing various oxetane compounds. Has been proposed.

  As said oxetane compound, the oxetane compound represented by following General formula (4) is proposed also in the patent document, for example (refer patent document 1).

  Furthermore, biphenyl derivatives having an oxetane ring represented by the following general formula (5) and general formula (6) have also been proposed (see Patent Documents 2 and 3).

  The above compounds are usually obtained by synthesizing an oxetane sulfonic acid ester and a corresponding dihydric phenol compound in the presence of an alkali metal such as sodium hydroxide or potassium hydroxide as a base. can get. In the synthesis, a phase transfer catalyst such as a quaternary ammonium salt is also used as necessary to increase the yield of the compound. Furthermore, the oxetane compound has been conventionally used for materials such as paints and adhesives in order to improve heat resistance, adhesion, etc. In recent years, it has also been proposed to use it as a material for forming optical waveguides. (See Patent Documents 4 and 5). Optical waveguides are incorporated in optical waveguide devices, optical integrated circuits, and optical wiring boards, and are widely used in the fields of optical communication, optical information processing, and other general optics.

JP-A-6-16804 JP-A-11-106380 JP 2001-31665 A JP 2000-356720 A JP 2003-147045 A

  However, among the oxetane compounds, the biphenyl derivative is a compound having a low molecular weight, and thus has a low viscosity. For example, when a film is formed on a substrate, it has a difficulty in forming a thick film. Moreover, since it is bifunctional, there also exists a fault that hardening requires time. Further, other oxetane compounds have a problem that it is difficult to obtain desired thick film formability and curability.

  In addition, when such a conventional oxetane compound is used, for example, as a material for forming an optical waveguide, it is difficult to stably cure and form the same shape. There are also problems such as inability to form.

  Furthermore, the conventional method for synthesizing an oxetane compound also has a problem that the introduction of an oxetanyl group does not proceed quantitatively and the yield of the target oxetane compound is low. In addition, since a compound having an unreacted hydroxyl group is generated as a by-product, a complicated operation is often involved before obtaining the target oxetane compound.

The present invention has been made in view of such circumstances, and provides an optical waveguide forming resin composition excellent in thick film formability, curability, heat resistance, and the like, a method for producing the same, and an optical waveguide using the same. For that purpose.

In order to achieve the above object, the present invention provides a resin composition for forming an optical waveguide comprising a trisoxetane ether compound represented by the following general formula (1) and a compound having an epoxy group or a vinyl ether group . It is set as the summary of 1.

Further, the present invention is a method for producing a resin composition for forming an optical waveguide according to the first aspect, wherein a phenol represented by the following general formula (2) is converted to cesium phenolate with a cesium salt, The trisoxetane ether compound represented by the above general formula (1) is synthesized by reacting with a sulfonic acid ester represented by the following general formula (3), and a compound having an epoxy group or a vinyl ether group. The manufacturing method of the resin composition for optical waveguide formation which melt | dissolves this is made into a 2nd summary.

Furthermore, the present invention is an optical waveguide comprising a substrate and a clad layer formed on the substrate, wherein a core portion that propagates an optical signal in a predetermined pattern is formed in the clad layer, An optical waveguide in which at least one of the clad layer and the core part is formed of the resin composition for forming an optical waveguide of the first aspect is a third aspect.

That is, the present inventors have sought for a resin composition for forming an optical waveguide excellent in heat resistance, mechanical properties, and the like, and have made extensive studies. Then, to synthesize a variety of compounds having a special structure, as a result of repeated experiments, optical containing the belt squirrel oxetane ether compound represented by the above general formula (1), and a compound having an epoxy group or a vinyl ether group When the resin composition for forming a waveguide was used, it was found that the intended purpose as described above was achieved, and the present invention was achieved. That is, since the above tris oxetane ether compound has three oxetane rings in one molecule, it has fast curability and the cured product forms a high-density network structure and has excellent heat resistance and the like. It will be. The tris oxetane ether compound is not a low molecular weight but a high molecular weight like existing compounds, so it has a high viscosity and is advantageous when forming a thick film, especially for optical waveguides (cladding layer and core part). When used as a forming material, it becomes easy to stably produce a cured material in the same shape, so that effects such as stabilization of waveguide characteristics can be obtained. On the other hand, the present inventors have also conducted research on a synthesis method capable of synthesizing the trisoxetane ether compound with high yield. As a result, a phenol represented by the above general formula (2) and a sulfonic acid ester of 3-alkyl-3-hydroxymethyloxetane represented by the above general formula (3), in particular, a cesium salt as a base. It was also found that the target trisoxetane ether compound can be synthesized in a high yield as a result of using and reacting under predetermined conditions.

Thus, the present invention is according to the represented belt squirrel oxetane ether compound by the above general formula (1) and the optical waveguide forming resin composition containing a compound having an epoxy group or a vinyl ether group. The trisoxetane ether compound has a high molecular weight rather than a low molecular weight like existing compounds, and thus has a high viscosity. Therefore, the resin composition for forming an optical waveguide of the present invention can easily form a thick film. It becomes. Moreover, since the said tris oxetane ether compound contains three oxetane rings in 1 molecule, the resin composition for optical waveguide formation of this invention has the property to harden | cure rapidly with light or a heat | fever. Therefore, the resin composition for forming an optical waveguide of the present invention is excellent in curability, heat resistance, toughness and mechanical properties, has low water absorption, coating flatness and adhesion, and further has high reactivity. since it is possible to reduce the use of polymerization initiators, higher transparency, it is useful as a material for forming the optical waveguide path.

  And when the said tris oxetane ether compound is synthesize | combined, a specific oxetanesulfonic acid ester and specific phenols are made into a complicated thing by making it react on predetermined conditions using a cesium salt as a base. It can be synthesized in high yield without any operation.

Furthermore, when at least one of the clad layer and the core part in the optical waveguide is formed of the resin composition for forming an optical waveguide of the present invention, it is easy to stably cure and form the same shape, stable waveguide characteristics, etc. Can be obtained.

It is a cross-sectional view showing an example of the optical waveguide of the present invention. It is explanatory drawing which shows the manufacturing process of the optical waveguide of this invention.

  Next, an embodiment of the present invention will be described.

The tris oxetane ether compound contained in the optical waveguide forming resin composition of the present invention is a compound represented by the following general formula (1), and has a structure having three oxetane rings in one molecule. Yes. In the general formula (1), R ₃ is a hydrogen atom or an alkyl group having 1 to 6 carbon atoms as shown below, and examples thereof include a methyl group, an ethyl group, a propyl group, and a butyl group. Are preferably a methyl group or an ethyl group.

  The tris oxetane ether compound represented by the general formula (1) includes a phenol represented by the following general formula (2) and a 3-alkyl-3-hydroxymethyl represented by the following general formula (3). It can be produced by using oxetane sulfonate ester and base as a synthetic raw material and reacting them.

  Here, as the base, a conventionally known alkali metal (sodium hydroxide, potassium hydroxide, etc.) may be used. However, in the present invention, particularly when a cesium salt is used as the base, the trisoxetane is used. Since an ether compound can be synthesized in a high yield without complicated operation, it is preferable. In this case, for example, synthesis of each raw material is performed by, for example, (i) converting phenols to cesium phenolate with a cesium salt and then reacting with oxetane sulfonate, or (ii) oxetane sulfonate and phenol. The reaction is carried out in the presence of a cesium salt. Preferably, it is carried out according to the procedure (i) above. The above synthesis is usually carried out in an organic solvent (reaction solvent), and after the reaction is completed, water or the like is added to the reaction solution to form an aqueous phase and an organic phase, and extraction from the organic phase is performed for the purpose. The tris oxetane ether compound can be obtained.

  Examples of the cesium salt include cesium carbonate, cesium hydroxide, cesium fluoride, cesium formate, and the like. Among these, cesium carbonate is preferably used because the target tris oxetane ether compound can be obtained in a higher yield.

  And it is preferable to set the usage-amount of the said cesium salt to 0.8-2.0 mol with respect to 1 mol of phenolic hydroxyl groups of the phenols represented by the said General formula (2), More preferably, 1 The range is from 0.0 to 1.5 mol.

Specific examples of the phenols represented by the general formula ( 2) are not particularly limited. For example, tris (4-hydroxyphenyl) methane, 1,1,1-tris (4-hydroxyphenyl) ethane, 1,1,1-tris (3-hydroxyphenyl) ethanone emissions and the like. These may be used alone or in combination of two or more.

  A specific example of the sulfonic acid ester of 3-alkyl-3-hydroxymethyloxetane represented by the general formula (3) used together with the phenols as described above is 2- (3-oxetanyl) propylmesi Rate, 2- (3-oxetanyl) propylphenylsulfonylate, 2- (3-oxetanyl) propyl tosylate, 2- (3-oxetanyl) butyl mesylate, 2- (3-oxetanyl) butyl tosylate and the like It is done. These may be used alone or in combination of two or more.

  The sulfonic acid ester of 3-alkyl-3-hydroxymethyloxetane represented by the general formula (3) is, for example, organic synthesis vol. 1 [Organic Synthesis, Collective vol. 1, pp. 145 (1941)]. It can be synthesized according to the method described in 1.

  Furthermore, the usage-amount of the sulfonic acid ester of 3-alkyl-3-hydroxymethyl oxetane represented by the said General formula (3) is 1 mol of phenolic hydroxyl groups of the phenol represented by the said General formula (2). Is preferably set to 1.5 to 2.0 mol, and more preferably in the range of 1.0 to 1.5 mol.

And in manufacture of the tris oxetane ether compound contained in the resin composition for optical waveguide formation of this invention, it is preferable to set the reaction temperature in the case of the synthesis | combination to 0-120 degreeC, More preferably, 60- It is in the range of 100 ° C. Moreover, when phenols are cesium phenolated in advance with a cesium salt, the reaction temperature in the cesium phenolate is preferably set to 0 to 120 ° C, more preferably in the range of 40 to 100 ° C. . And the pressure in these reactions is not specifically limited, Any of a normal pressure, pressurization, and pressure reduction may be sufficient. The reaction atmosphere may be a nitrogen atmosphere or an air atmosphere, and is not particularly limited.

In addition, when synthesizing the trisoxetane ether compound contained in the resin composition for forming an optical waveguide of the present invention, an alkali metal such as sodium or potassium, or an alkali metal such as lithium hydride or sodium hydride, if necessary. A hydride, an alkali metal hydroxide such as sodium hydroxide or potassium hydroxide, an alkali metal carbonate such as sodium carbonate, or the like may be appropriately added as a synthetic raw material.

  Moreover, you may add a quaternary ammonium salt, a quaternary phosphonium salt, etc. as a phase transfer catalyst between an aqueous phase and an organic phase as needed. The quaternary ammonium salt is not particularly limited, and examples thereof include tetraalkylammonium halides such as tetrabutylammonium bromide (TBAB) and tetraethylammonium bromide, and aralkyltrialkylammonium halides such as benzyltrimethylammonium chloride. can give. The quaternary phosphonium salt is not particularly limited, and examples thereof include tetraarylphosphonium halides such as tetraphenylphosphonium bromide.

Furthermore, when producing the trisoxetane ether compound contained in the optical waveguide forming resin composition of the present invention, a reaction solvent is usually used as described above. The reaction solvent is not particularly limited. For example, aromatic hydrocarbons (toluene, xylene, etc.), ethers (tetrahydrofuran, dibutyl ether, etc.), aprotic polar solvents (N-methylpyrrolidone, N-methyl-2- Pyrrolidone, N, N-dimethylformamide, N, N-dimethylacetamide, etc.) are preferably used. These may be used alone or in combination of two or more.

  As described above, the trisoxetane ether compound synthesized from each of these raw materials is usually separated into an aqueous phase and an organic phase by adding water and ethyl acetate to the reaction solution, and the organic phase is separated. The extracted material can be recovered by drying with anhydrous magnesium sulfate or the like.

The belt squirrel oxetane ether compounds obtained in this way is, as a material of the optical waveguide forming resin composition of the present invention can be effectively utilized.

For details, as shown in FIG. 1, a substrate 1, a cladding layer 2 formed thereon a substrate 1, a predetermined pattern in the cladding layer 2, cores 3 for propagating an optical signal is formed In at least one of the clad layer 2 and the core portion 3 formed by the resin composition containing the tris oxetane ether compound, the compound has a high molecular weight and thus has a high viscosity. This is advantageous when forming a thick film. In addition, it is possible to obtain an effect such as that the waveguide characteristics can be stably stabilized by being easily cured in the same shape. The clad layer 2 needs to have a refractive index smaller than that of the core portion 3.

Further, at least one of the cladding layer 2 and the core portion 3, together with the trisoxetane compound, since it is formed of a resin composition containing a compound having an epoxy group or a vinyl ether group, the heat resistance and moisture resistance it is possible to obtain an excellent cured product, also Ru been attempted also improve exposure sensitivity. Here, as the compound having an epoxy group, any compound can be used as long as it is compatible with the compound represented by the formula (1) of the present invention. Specifically, examples of the epoxy compound having one epoxy group include phenyl glycidyl ether and butyl glycidyl ether, and examples of the epoxy compound having two or more epoxy groups include bisphenol A diglycidyl ether, bisphenoxyethanol full orange glycidyl. Ether, trimethylolpropane triglycidyl ether, bisphenolfluorene tetraglycidyl ether, 3,4-epoxycyclohexenylmethyl-3 ′, 4′-epoxycyclohexenecarboxylate, 2,2-bis ( An adduct of 1,2-epoxy-4- (2-oxiranyl) cyclohexane with hydroxymethyl) -1-butanol is preferably used. Moreover, as a compound which has the said vinyl ether group, all can be used if it shows compatibility with the compound represented by Formula (1) of this invention. Specifically, examples of the compound having one vinyl ether group include hydroxyethyl vinyl ether, hydroxybutyl vinyl ether, dodecyl vinyl ether and the like. As the compound having two or more vinyl ether groups, cyclohexane dimethanol divinyl ether, triethylene glycol divinyl ether, novolak type divinyl ether and the like are preferably used. And these compounds are used individually or in combination of 2 or more types.

  And the said optical waveguide can be manufactured by a process as shown in FIG. 2, for example. That is, as shown in FIG. 2A, first, a substrate 1 is prepared, and as shown in FIG. 2B, an under cladding layer 2a (a lower portion of the cladding layer 2) is formed on the surface of the substrate 1. Next, as shown in (c), a layer 3 ′ made of a resin composition for forming the core portion 3 is formed on the under cladding layer 2 a. Then, as shown in (d), a photomask 9 for exposing a predetermined pattern (optical waveguide pattern) is disposed on the surface of the resin composition layer 3 ′, and ultraviolet rays are emitted through the photomask 9. Irradiation and further heat treatment. Thereafter, the unexposed portion of the resin composition layer 3 ′ is dissolved and removed using a developer to form the core portion 3 as shown in FIG. Then, as shown in (f), an over clad layer 2b (an upper portion of the clad layer 2) is formed on the core portion 3. Thereby, the target optical waveguide can be obtained.

  Each layer on the substrate 1 can be formed by a conventionally known method such as spin coating or coater. The optical waveguide can also be made into a film-like optical waveguide by peeling and removing the substrate 1. In such a configuration, the flexibility becomes excellent.

  The optical waveguide thus obtained is, for example, a straight optical waveguide, a curved optical waveguide, a crossed optical waveguide, a Y-branch optical waveguide, a slab optical waveguide, a Mach-Zehnder optical waveguide, an AWG optical waveguide, a grating, or an optical waveguide lens. Etc. can be used. Optical devices using these optical waveguides include wavelength filters, optical switches, optical splitters, optical multiplexers, optical multiplexers / demultiplexers, optical amplifiers, wavelength converters, wavelength dividers, optical splitters, directional couplers. Furthermore, an optical transmission module in which laser diodes and photodiodes are integrated in a hybrid manner can be used.

  Next, examples will be described.

  First, prior to Examples, 2- (3-oxetanyl) butyl tosylate, which is a sulfonic acid ester of 3-alkyl-3-hydroxymethyloxetane, was synthesized as follows.

[Synthesis of 2- (3-oxetanyl) butyl tosylate]
In a 2000 ml three-necked eggplant flask equipped with a thermometer, a condenser, a stirrer, and a dropping funnel, 190.65 g (1.0 mol) of p-toluenesulfonic acid chloride, 32.24 g (0.1 mol) of tetramethylammonium bromide and toluene 400 ml was added and cooled to 5 ° C. with stirring in an ice bath. After adding 116.16 g (1.0 mmol) of 3-ethyl-hydroxymethyloxetane to this, 130 ml of 35 wt% sodium hydroxide aqueous solution was dripped over 30 minutes with the dropping funnel. After completion of the dropwise addition, the flask was stirred as it was at the same temperature for 1 hour, and further stirred at room temperature for 16 hours. After completion of the reaction, 800 ml of water was added to the flask and stirred vigorously, and then left to separate into an aqueous phase and an organic phase. This organic phase was further washed with 400 ml of water and dried over anhydrous magnesium sulfate overnight. Thereafter, magnesium sulfate was filtered off and the filtrate was concentrated. The crude product thus obtained was separated and purified by silica gel column chromatography (eluent: hexane / ethyl acetate), and the target colorless liquid, ie, 2- (3-oxetanyl) butyl tosylate, was obtained. 243.3 g (yield 90%) was obtained.

[Experimental Example 1]
In a 200 ml three-necked flask equipped with a thermometer, a condenser and a stirrer, put 6.13 g (20 mmol) of 1,1,1-tris (4-hydroxyphenyl) ethane and 25 ml of N-methyl-2-pyrrolidone. The mixture was stirred until it was completely dissolved while being heated to 80 ° C. in a nitrogen atmosphere. After dissolution, 23.46 g (72 mmol) of cesium carbonate was added, and the mixture was further stirred for 30 minutes. Thereto was added 17.84 g (66 mmol) of 2- (3-oxetanyl) butyl tosylate synthesized earlier, and the mixture was stirred at 80 ° C. for 20 hours in a nitrogen atmosphere. After completion of the reaction, the reaction mixture was cooled to room temperature, 100 ml of ethyl acetate and 50 ml of distilled water were added, and the mixture was allowed to stand to separate into an aqueous phase and an organic phase. The organic phase thus separated was extracted and further washed with water and dried over anhydrous magnesium sulfate overnight. Thereafter, magnesium sulfate was filtered off, and the solvent was distilled off to obtain a crude reaction product.

  The crude product thus obtained was analyzed by thin layer chromatography, and only one spot was confirmed. The crude product was recrystallized from ethyl acetate to obtain 10.93 g (yield 91%) of a white solid. When the purity of the compound was examined by liquid chromatography, it was 99% or more.

The compound thus obtained is represented by the following structural formula (7) from the following results obtained by analysis using ¹ H-NMR and ¹³ C-NMR (both manufactured by JEOL Ltd.). 1,1,1-tris [4- [2- (3-oxetanyl)] butoxyphenyl] ethane.

¹ H-NMR (CDCl ₃ , 400 MHz): δ (ppm); 0.93 (t, J = 7.6 Hz, 9H, CH ₃ ), 1.87 (q, J = 7.6 Hz, 6H, CH ₂ ), 2.11 (s, 3H, CH ₃ ), 4.05 (s, 6H, CH ₂ ), 4.47 (d, J = 6.0 Hz, 6H, CH ₂ ), 4.56 (d, J = 5.6 Hz, 6H, CH ₂ ), 6.83 (d, J = 9.2 Hz, 6 H, Ar), 7. 01 (d, J = 8.8 Hz, 6H, Ar)
¹³ C-NMR (CDCl ₃ , 100 MHz): δ (ppm); 8.22, 26.70, 30.83, 43.19, 50.66, 70.18, 78.17, 113.70, 129. 62, 142.03, 157.05

[Example 1 ]
In the following manner, an under cladding layer, a core portion, and an under cladding layer were formed to produce an optical waveguide (see FIG. 1). And the evaluation with respect to the optical waveguide was performed as follows.

[Formation of underclad layer]
First, experimental examples obtained in 1 1,1,1-tris (4- (2- (3-oxetanyl)) butoxyphenyl) and 70 parts of ethane, is an alicyclic epoxy 3,4 epoxycyclohexenyl 30 parts of methyl-3 ′, 4′-epoxycyclohexenecarboxylate (Daicel Chemical Industries, Celoxide 2021P) and 4,4-bis [di (βhydroxyethoxy) phenylsulfinio] phenyl sulfide-bis-hexafluoro One part of a 50% propion carbide solution of antimonate was dissolved in cyclohexanone to prepare a polymerizable composition C for forming a cladding layer. Next, an Si substrate (5 cm × 5 cm × thickness 2 mm) was prepared, and the polymerizable composition C was applied to the surface by a spin coating method and dried at 100 ° C. for 5 minutes. Then, the entire surface was irradiated with ultraviolet rays at a dose of 2000 mJ / cm ² , and subsequently heat-treated at 100 ° C. for 30 minutes to form an under cladding layer (see FIG. 2B). It was 30 micrometers when the thickness of this under clad layer was measured with the contact-type film thickness meter. The refractive index of the underclad was 1.547 at a wavelength of 633 nm.

[Formation of core part]
Then, obtained in Experiment Example 1 1,1,1-tris (4- (2- (3-oxetanyl)) butoxyphenyl) ethane 90 parts and, bisphenoxyethanolfluorene diglycidyl ether (epoxy equivalent 320) 10 Part and 4,4-bis [di (βhydroxyethoxy) phenylsulfinio] phenyl sulfide-bis-hexafluoroantimonate 50% propion carbide solution in cyclohexanone to form a core part A polymerizable composition D was prepared. And the said polymeric composition D was apply | coated on the said under clad layer by the spin coat method (refer FIG.2 (c)). Then, this coated layer was dried at 150 ° C. for 20 minutes, and a synthetic quartz-based chromium mask (photomask) on which a 50 μm-wide linear optical waveguide pattern was drawn was further disposed (FIG. 2 (d) )), And an ultraviolet ray with an irradiation amount of 2000 mJ / cm ² was irradiated through this chrome mask by a contact exposure method, and further a heat treatment was performed at 150 ° C. for 30 minutes. Then, in order to remove an unirradiated part, development was performed using a γ-butyrolactone aqueous solution, and the core pattern was formed by further heating at 150 ° C. for 30 minutes (see FIG. 2E). When the core shape was measured with a length measuring microscope, the core pattern had a square cross-sectional shape with a width of 50 μm and a height of 50 μm. Further, the refractive index of the core portion formed in this way was 1.573 at a wavelength of 633 nm.

[Formation of overclad layer]
The same polymerizable composition C prepared during the formation of the underclad layer was applied onto the core part and the underclad layer by a spin coating method. Next, it was dried at 100 ° C. for 5 minutes, irradiated with ultraviolet rays at an irradiation amount of 2000 mJ / cm ² , and subsequently heat-treated at 150 ° C. for 60 minutes to form an overcladding layer (FIG. 2 ( f)). In this way, the relative refractive index Δ = 1. A 7% optical waveguide was produced.

[Evaluation]
The optical waveguide was cut into a length of 10 cm using a dicing apparatus (Model 522 manufactured by Disco Corporation) and subjected to end face processing. When the cross-sectional shape of the optical waveguide was observed with a length measuring microscope, it was found to be a buried multimode optical waveguide with an under cladding layer thickness of 30 μm, a core portion of 50 μm × 50 μm, and an over cladding layer thickness of 70 μm. It was confirmed. Then, the optical propagation loss of this optical waveguide was measured by a conventional cutback method using a laser beam having a wavelength of 850 nm, and found to be 0.07 dB / cm.

An optical waveguide forming resin composition of the present invention is used for forming materials of the clad layer and the core portion of the optical waveguide. Examples of the optical waveguide include a straight optical waveguide, a curved optical waveguide, a crossed optical waveguide, a Y-branch optical waveguide, a slab optical waveguide, a Mach-Zehnder optical waveguide, an AWG optical waveguide, a grating, and an optical waveguide lens. It is done. The optical device using the optical waveguide includes a wavelength filter, an optical switch, an optical splitter, an optical multiplexer, an optical multiplexer / demultiplexer, an optical amplifier, a wavelength converter, a wavelength divider, an optical splitter, and directional coupling. And an optical transmission module in which a laser diode and a photodiode are hybrid-integrated.

1 Substrate 2 Clad layer 3 Core part

Claims (4)

A resin composition for forming an optical waveguide comprising a trisoxetane ether compound represented by the following general formula (1) and a compound having an epoxy group or a vinyl ether group .

It is a manufacturing method of the resin composition for optical waveguide formation of Claim 1, Comprising: The phenol represented by following General formula (2) is cesium phenolate by a cesium salt, Then, following General formula (3) The trisoxetane ether compound represented by the general formula (1) is synthesized by reacting with a sulfonic acid ester represented by the formula (1), and the compound having an epoxy group or a vinyl ether group is dissolved. A method for producing a resin composition for forming an optical waveguide .

The method for producing a resin composition for forming an optical waveguide according to claim 2, wherein the cesium salt is cesium carbonate. An optical waveguide comprising a substrate and a clad layer formed on the substrate, wherein a core portion that propagates an optical signal in a predetermined pattern is formed in the clad layer, wherein the clad layer and the core portion At least one is formed with the resin composition for optical waveguide formation of Claim 1, The optical waveguide characterized by the above-mentioned.

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