WO2006001434A1 - フィルム光導波路及びその製造方法並びに電子機器装置 - Google Patents
フィルム光導波路及びその製造方法並びに電子機器装置 Download PDFInfo
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- WO2006001434A1 WO2006001434A1 PCT/JP2005/011771 JP2005011771W WO2006001434A1 WO 2006001434 A1 WO2006001434 A1 WO 2006001434A1 JP 2005011771 W JP2005011771 W JP 2005011771W WO 2006001434 A1 WO2006001434 A1 WO 2006001434A1
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- elastomer
- precursor
- optical waveguide
- film optical
- cladding layer
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Classifications
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/13—Integrated optical circuits characterised by the manufacturing method
- G02B6/138—Integrated optical circuits characterised by the manufacturing method by using polymerisation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12083—Constructional arrangements
- G02B2006/121—Channel; buried or the like
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3608—Fibre wiring boards, i.e. where fibres are embedded or attached in a pattern on or to a substrate, e.g. flexible sheets
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4403—Optical cables with ribbon structure
Definitions
- the present invention relates to a film optical waveguide and a method for manufacturing the same.
- the present invention also relates to an electronic apparatus apparatus using the film optical waveguide.
- Optical communication technology is also used for long-distance communication that crosses the country and medium-distance communication within a region. However, at short communication distances, it can also be used for optical signal transmission between devices and between devices. Used.
- Elastomer is a general term for polymer materials having rubber-like elasticity at room temperature, and generally refers to materials having a low bending elastic modulus such as rubbers.
- the reason why the bending elastic modulus of the elastomer is low will be described.
- the polymer molecules undergo a Brownian motion at room temperature where the glass transition temperature is low. In other words, the elastomer is fluid.
- the polymer molecules constituting the elastomer have fluidity because the molecular chains are chemically cross-linked, but the fluidity is partial. Therefore, the elastomer has a rubber-like property that it can be bent easily even though it is solid.
- Elastomers are obtained by irradiating the precursor monomers and oligomers by energy irradiation. Obtained by curing.
- monomers and oligomers are crosslinked by hydrogen bonds between hydrophilic groups, and many precursors also contain hydrophilic groups in the molecule.
- the mixture of precursors has a low viscosity due to hydrogen bonding between the hydrophilic groups, and exhibits a property of high viscosity. When this precursor mixture is cured by irradiation with energy, it becomes a rubber-like elastomer having a small bending elasticity.
- FIG. 1 (a) to 1 (g) are schematic cross-sectional views for explaining a conventionally proposed method for manufacturing a film optical waveguide.
- a clad material 12 is dropped on a substrate 11 as shown in FIG.
- the clad material 12 is a monomer or oligomer that is a precursor of a low refractive index elastomer.
- FIG. 1B the clad material 12 on the substrate 11 is thinly stretched by a spin coater, and the clad material 12 is cured by energy irradiation to obtain the lower clad layer 13.
- the surface of the lower cladding layer 13 is patterned to form the concave groove 14, and then, as shown in FIG. A core material 15 having a refractive index higher than that of the cladding layer 13 is filled.
- the core material 15 is a monomer or oligomer that is a polymer precursor having a higher refractive index than that of the lower cladding layer 13.
- this core material 15 is irradiated with energy, the core material 15 is cured and a core 16 having a refractive index higher than that of the lower cladding layer 13 is formed in the concave groove 14 as shown in FIG.
- FIG. 1 (c) the surface of the lower cladding layer 13 is patterned to form the concave groove 14, and then, as shown in FIG.
- a core material 15 having a refractive index higher than that of the cladding layer 13 is filled.
- the core material 15 is a monomer or oligomer that is a polymer precursor having a higher refractive index than that of the lower cla
- the same cladding material 12 (elastomer precursor) as the lower cladding layer 13 is dropped and spread thinly by spin coating. After that, the clad material 12 is cured by irradiating energy, and an upper clad layer 17 made of the clad material 12 is formed as shown in FIG.
- the thickness of the cladding layer obtained by spin coating can be reduced.
- the viscosity of the elastomer precursor is reduced, the flexural modulus of the cured elastomer (cladding layer) increases, and eventually it is difficult to obtain a film optical waveguide that can be bent with a small radius of curvature. there were.
- a thin film optical waveguide 18 is intentionally obtained by such a manufacturing method, after the lower cladding layer 13 is cured and the upper cladding layer 17 is cured, the lower cladding layer 13 and the upper cladding layer 17 are formed. Many processes were required to obtain a thin film optical waveguide 18 that could only be thinned by polishing or the like, and there was a problem in productivity.
- Patent Document 1 discloses a force using a urethane-based ultraviolet curable resin as a core material.
- the thickness of only one clad substrate is 1.5 mm, and the radius of curvature is small. I can't expect to bend it.
- Patent Document 1 Japanese Patent Laid-Open No. 10-90532
- the present invention has been made in view of the technical problems as described above, and an object of the present invention is to provide a film optical waveguide that can be bent with a small radius of curvature and a method for manufacturing the same. is there.
- a film optical waveguide according to the present invention has at least one of a lower clad layer and an upper clad layer formed of an elastomer having a flexural modulus of l, OOOMPa or less, and the upper clad layer and the lower clad layer.
- the total film thickness is 300 m or less.
- the film optical waveguide of the present invention at least one of the upper cladding layer and the lower cladding layer is formed by an elastomer having a flexural modulus of 1,000 MPa or less, and the upper and lower cladding layers Since the sum of the film thicknesses is as thin as 300 m or less, the film optical waveguide can be bent with a small radius of curvature (for example, several mm or less). Therefore, in a portable small device or the like, the film optical waveguide can be wired along the surface of the component or by sewing the gap between the components.
- a core may be formed. If the core is made of an elastomer with a flexural modulus of l, OOOMPa or less, the core will bend easily, and the film optical waveguide can be bent with a smaller radius of curvature.
- the bending elastic modulus of the core is larger than the bending elastic modulus of the upper cladding layer and the lower cladding layer.
- the deformation of the core can be kept small even when the film optical waveguide is stretched or twisted. And loss of light propagating through the core can be reduced.
- a first method for producing a film optical waveguide of the present invention includes a step of supplying a precursor having a monomer or oligomer power of an elastomer having a flexural modulus after curing of ⁇ , ⁇ Pa or less to the substrate,
- the stamper is pressed against the elastomer precursor, and the stamper applies pressure to the elastomer precursor to reduce the thickness of the elastomer precursor, and the elastomer precursor is cured to lower the cladding layer.
- the substrate is not limited to a glass substrate or the like for forming the lower cladding layer, but may be a surface plate of an apparatus for forming the lower cladding layer. This substrate is preferably finally removed from the film light guide.
- a lower cladding layer having a bending elastic modulus of less than or equal to 1,000 MPa and a small thickness can be obtained, and a film optical waveguide that can be bent with a small radius of curvature can be manufactured.
- the second film optical waveguide manufacturing method of the present invention includes a step of forming a lower cladding layer, a step of forming a core on the lower cladding layer, and a bending elastic modulus after curing of l, OOOMPa.
- the elastomer precursor is pressed and thinned with a stamper while using an elastomer having a flexural modulus of ⁇ , ⁇ Pa or less.
- an upper cladding layer having a thin film thickness (for example, a film thickness of 150 m or less) can be obtained. Therefore, according to the present invention, it is possible to obtain a thin upper cladding layer having a flexural modulus of 1,000 MPa or less and a film optical waveguide that can be bent with a small radius of curvature. .
- a precursor having a monomer or oligomer power of an elastomer having a flexural modulus after curing of ⁇ , ⁇ Pa or less is supplied to the first substrate.
- a step of pressing a stamper against the precursor of the elastomer and applying a pressure to the precursor of the elastomer with the stamper to reduce a thickness of the precursor of the elastomer, and a precursor of the elastomer A step of forming a lower cladding layer by curing the body, a step of supplying a precursor made of a monomer or oligomer of an elastomer having a flexural modulus of less than l000 MPa to the second substrate after curing, A step of pressing a stamper against the precursor of the elastomer supplied to the substrate of 2 and reducing the film thickness of the precursor of the elastomer by applying pressure to the precursor of the elastomer with the stamper; Forming an upper clad layer by curing the precursor of the E elastomer supplied to the plate, said lower cladding layer also Comprises a step of bonding the lower clad layer and the upper clad layer so as to sandwich the core formed in
- the substrate is not limited to the glass substrate for forming the upper cladding layer or the lower cladding layer, but may be a surface plate of an apparatus for forming the upper cladding layer or the lower cladding layer. This substrate should also finally remove the film optical waveguide forces.
- the elastomer precursor is pressed and thinned with a stamper while using an elastomer having a flexural modulus of ⁇ , ⁇ Pa or less.
- an upper cladding layer and a lower cladding layer having a thin film thickness (for example, a film thickness of 150 m or less) can be obtained. Therefore, according to the present invention, it is possible to obtain an upper cladding layer and a lower cladding layer having a flexural modulus of l, OOOMPa or less and having a small thickness, and manufacturing a film optical waveguide that can be bent with a small radius of curvature. be able to.
- the force that causes the upper cladding layer and the lower cladding layer to warp due to the internal stress generated by the pressure from the stamper is formed by pressing with a stamper, and then the upper cladding layer is turned upside down and bonded onto the lower cladding layer.
- the warpage of the lower cladding layer can be offset and the occurrence of warpage in the film optical waveguide can be suppressed.
- a precursor having a monomer or oligomer power of an elastomer having a flexural modulus after curing of ⁇ ⁇ ⁇ ⁇ , ⁇ Pa or less is supplied to the first substrate.
- a step of pressing a stamper against the precursor of the elastomer and applying a pressure to the precursor of the elastomer with the stamper to reduce a thickness of the precursor of the elastomer, and a precursor of the elastomer A step of forming a lower cladding layer by curing the body, a step of supplying a precursor made of a monomer or oligomer of an elastomer having a flexural modulus of l, OOOMPa or less after curing to the second substrate, A step of pressing a stamper against the precursor of the elastomer supplied to the substrate of 2 and reducing the film thickness of the precursor of the elastomer by applying pressure to the precursor of the elastomer with the stamper; Forming an upper clad layer by curing the precursor of the E elastomer supplied to the plate, and the upper cladding layer and the lower cladding layer bonded together in the core material, the upper cladding and the lower cladding layer And
- the elastomer precursor is pressed and thinned with a stamper while using an elastomer having a flexural modulus of ⁇ , ⁇ Pa or less.
- an upper cladding layer and a lower cladding layer having a thin film thickness (for example, a film thickness of 150 m or less) can be obtained. Therefore, according to the present invention, it is possible to obtain an upper cladding layer and a lower cladding layer having a flexural modulus of 1,000 MPa or less and having a small thickness, and manufacturing a film optical waveguide that can be bent with a small radius of curvature. be able to.
- the core is formed of the core material at the same time by bonding the lower cladding layer and the upper cladding layer with the core material.
- the molding of the core with the material and the joining work of the upper and lower cladding layers with the core material can be performed at a time, and the manufacturing process of the film optical waveguide can be reduced and the manufacturing process can be rationalized.
- a film optical waveguide module according to the present invention is characterized in that the film optical waveguide according to the present invention and a light projecting element or a light receiving element are arranged and integrated so as to be optically coupled. .
- the film optical waveguide module of the present invention a film optical waveguide module having a thin optical waveguide portion and excellent bending performance can be obtained.
- the optical waveguide portion is not easily damaged even if the rotating portion is repeatedly rotated, and the durability of the device can be improved.
- a first electronic device is a foldable electronic device device in which one member and the other member are rotatably connected by a rotating part, and pass through the rotating part.
- the film optical waveguide according to the present invention is wired between one member and the other member.
- the optical waveguide device of the present invention a film optical waveguide having a thin thickness and excellent bending performance can be obtained. Therefore, the optical waveguide device has a rotating portion such as a hinge portion. When used in an electronic device, the film optical waveguide is less likely to be damaged even if the rotating portion is repeatedly rotated, and the durability of the electronic device can be improved.
- the second optical waveguide device according to the present invention is an electronic device apparatus having a moving part in an apparatus main body, wherein the moving part and the apparatus main body are formed by the film optical waveguide according to claim 1 or 2. It is characterized by optical coupling.
- the film optical waveguide according to the present invention a film optical waveguide having a thin thickness and excellent bending performance can be obtained. Therefore, the optical waveguide device can be used as an electronic device having a moving part. When used, even if the film optical waveguide is repeatedly deformed along with the movement of the moving part, the film optical waveguide is damaged ⁇ and the durability of the electronic device can be improved.
- FIG. 1 (a) to FIG. 1 (g) are schematic cross-sectional views for explaining a film optical waveguide manufacturing method according to a conventional example.
- FIGS. 2 (a) to 2 (d) are schematic cross-sectional views sequentially illustrating the production steps of a film optical waveguide according to Example 1 of the present invention.
- FIG. 3 (a) to FIG. 3 (e) are schematic cross-sectional views for explaining the steps following FIG. 2 (a) to FIG. 2 (d).
- FIG. 4 is a chemical formula showing a part of a group contained in a monomer and an oligomer of an elastomer precursor used in a clad material.
- FIG. 5 (a) to FIG. 5 (d) are schematic cross-sectional views showing the manufacturing process of the upper cladding layer in Example 2 of the present invention.
- FIGS. 6 (a) to 6 (e) show a lower cladding layer formed on a substrate and an upper cladding layer formed on another substrate in Example 2 of the present invention.
- FIG. 6 is a schematic cross-sectional view for explaining a process of manufacturing a film optical waveguide by laminating and.
- FIGS. 7 (a) to 7 (e) show a lower cladding layer formed on a substrate and an upper cladding layer formed on another substrate in Example 3 of the present invention.
- FIG. 6 is a schematic cross-sectional view for explaining a process of manufacturing a film optical waveguide by laminating and.
- FIG. 8 is a schematic cross-sectional view illustrating a modification of the present invention.
- FIG. 9 shows a film optical waveguide module for one-way communication according to Example 4 of the present invention.
- FIG. 10 is a schematic cross-sectional view showing a part of the film optical waveguide module shown in FIG. 9 in an enlarged manner.
- Fig. 11 (a) schematically shows a film optical waveguide in which the core is deformed by a tensile force
- Fig. 11 (b) is a film optical waveguide in which the deformation of the core due to the tensile force is reduced. It is the figure which represented the path typically.
- FIG. 12 is a plan view showing a film optical waveguide module for two-way communication according to Example 4 of the present invention.
- FIG. 13 is a perspective view of a mobile phone that is Embodiment 5 of the present invention.
- FIG. 14 is a schematic diagram showing a circuit configuration of the mobile phone according to the embodiment.
- FIG. 15 is a perspective view schematically showing a state in which the display unit side and the operation unit side of the mobile phone are connected by a film optical waveguide.
- FIG. 16 is a schematic view showing the structure of another mobile phone according to the fifth embodiment of the present invention.
- FIG. 17 (a) shows a state in which the film optical waveguide in the mobile phone is twisted.
- FIG. 17 (b) is an enlarged view showing a cross section taken along line XX of FIG. 17 (a).
- FIG. 18 is an explanatory view showing the length a W of the twisted region of the film optical waveguide.
- FIG. 19 is a diagram showing the relationship between the ratio ⁇ of the length of the twisted region to the width of the film optical waveguide and the required limit value of the elastic modulus.
- FIG. 20 (a) and FIG. 20 (b) are schematic views showing the structure of still another mobile phone according to Embodiment 5 of the present invention, and FIG. 20 (a) is folded in two.
- FIG. 20 (b) is a diagram showing the state, and FIG.
- FIG. 21 is a perspective view of a printer that is Embodiment 6 of the present invention.
- FIG. 22 is a schematic diagram showing a circuit configuration of the printer of the above.
- FIG. 23 (a) and FIG. 23 (b) are perspective views showing how the film optical waveguide is deformed when the print head of the printer is moved.
- FIG. 24 is a perspective view of a hard disk device that is Embodiment 7 of the present invention.
- FIG. 25 is a diagram showing an example of a connection form of a film optical waveguide to an electronic circuit board. is there.
- FIG. 26 is a view showing another example of the connection form of the film optical waveguide to the electronic circuit board.
- FIG. 27 is a view showing still another example of the connection form of the film optical waveguide to the electronic circuit board.
- FIG. 28 is a perspective view showing another method of using the film optical waveguide according to the present invention.
- FIG. 29 is a side view showing a flexible composite transmission line in which a film optical waveguide and a flexible printed wiring board according to the present invention are overlapped.
- FIGS. 2 and 3 are schematic cross-sectional views for explaining a method for manufacturing a film optical waveguide according to the first embodiment of the present invention.
- a flat substrate 21 having translucency such as a glass substrate is prepared.
- a clad material 22 is applied on the substrate 21 as shown in FIG.
- the cladding material 22 used in Example 1 is a mixture of a urethane monomer and urethane oligomer containing a group as shown in FIG. 4 and a polymerization initiator, and the flexural modulus after curing is l, OOOMPa or less. It is the precursor of elastomer.
- the cladding material 22 is an ultraviolet curable type.
- the stamper (molding die) 23 is pressed against the cladding material 22 and the stamper 23 is pressed between the substrate 21 and the stamper 23.
- the clad material 22 is thinly spread and the clad material 22 is made thin. Since a convex pattern 24 for forming a concave groove in the lower cladding layer is formed on the lower surface of the stamper 23, a concave groove 25 is formed on the upper surface of the cladding material 22 pressed by the stamper 23. .
- the cladding material 22 is also cured by irradiating the cladding material 22 with ultraviolet energy through the substrate 21.
- the stamper 23 is separated from the lower clad layer 26 as shown in FIG. 2 (d).
- a concave groove 25 is formed on the upper surface of the lower cladding layer 26 by the convex pattern 24.
- the core material 27 is filled into the concave grooves 25 of the lower cladding layer 26.
- the core material 27 is a monomer or oligomer that is a polymer precursor having a higher refractive index than that of the lower cladding layer 26, and is an ultraviolet curable polymer precursor.
- an elastomeric precursor having a refractive index higher than that of the lower clad layer 26 and having a flexural modulus after curing of 1, OOOMPa or less V may be used.
- the core material 27 is irradiated with ultraviolet energy as shown in FIG. Harden,
- the core 28 is formed in the concave groove 25 by the core material 27.
- the same cladding material 22 as that used in the case of the lower cladding layer 26 is applied on the lower cladding layer 26 and the core 28, and FIG.
- the upper force stamper 29 is pressed against the cladding material 22 to apply pressure to reduce the thickness of the cladding material 22.
- the cladding material 22 is cured by irradiating the cladding material 22 with ultraviolet energy to form the upper cladding layer 30.
- the stamper 29 is separated from the upper clad layer 30, and the substrate 21 is peeled off from the lower clad layer 26 to form a film, whereby a film optical waveguide 31 as shown in FIG. 3 (e) is obtained.
- the viscosity of the cladding material 22 is low.
- the bending modulus of the lower clad layer 26 and the upper clad layer 30 is as small as l and OOOMPa, so that the viscosity of the precursor of the elastomer becomes high.
- the film thickness of the clad material 22 can be forcibly thinned and the film thickness can be increased even if the viscosity is about 30, OOcP. Can be reduced to 150 m or less. Therefore, the thickness of the film optical waveguide 31 is 300 ⁇ m or less, and the film optical waveguide 31 can be bent with a small radius of curvature.
- the film optical waveguide 31 of Example 1 using an elastomer having a bending elastic modulus of l and OOOMPa even when an elastomer having a precursor viscosity of 30, OOcP or less is used, the film light guide is used.
- the thickness of the waveguide 31 could be reduced to about 250 mm.
- the minimum radius of curvature when the film optical waveguide 31 was bent in the thickness direction was about 3 mm. Note that if the film is bent to have a smaller radius of curvature, the film optical waveguide will be bent.
- the obtained film optical waveguide could be bent until the radius of curvature was about 2 mm. Furthermore, when an elastomer having a flexural modulus of 200 MPa or less was used, the obtained film optical waveguide could be bent until the radius of curvature was about lmm.
- Example 1 the cladding material 22 supplied on the substrate 21 and the cladding material 22 supplied on the lower cladding layer 26 were immediately pressed by the stampers 23 and 29.
- the clad material 22 is thinned by a spin coater and then pressed by stampers 23 and 29. You may leave. If the spin coater is used in combination, the upper and lower cladding layers 30 and 26 can be made thinner, so that the minimum bending curvature of the film optical waveguide can be made smaller.
- both the upper cladding layer 30 and the lower cladding layer 26 are formed by an elastomer having a flexural modulus of 1 and OOOMPa or less. Only one of them may be formed by an elastomer having a flexural modulus of l and OOOMPa or less. In that case, the modified clathrate having a flexural modulus of force Sl, 000 MPa or less can be used for the clad layer on the side not using the elastomer.
- FIG. 5 and FIG. 6 are diagrams for explaining a method of manufacturing a film optical waveguide according to the second embodiment of the present invention.
- the lower clad layer 26 shown in FIG. 6 (a) is a lower clad layer 26 manufactured on the substrate 21 by the same process as in FIGS. 2 (a) to 3 (b) of the first embodiment.
- a core 28 is formed on the upper surface.
- the upper clad layer 30 shown in FIG. 6 (b) is manufactured on the substrate 32 by the steps shown in FIGS. 5 (a) to 5 (d). That is, the clad material 22 is applied on a flat substrate 32 having a light transmitting property such as a glass substrate as shown in FIG.
- This clad material 22 is a mixture of a urethane monomer and urethane oligomer containing a group as shown in FIG. 4 and a polymerization initiator, and is an elastomer having a flexural modulus of 1, which is less than OOOMPa after curing. It is a precursor.
- a flat stamper 33 is pressed against the cladding material 22, and pressure is applied to the stamper 33 so that the cladding material 22 is thinly spread between the substrate 32 and the stamper 33 to form a film. Reduce the thickness.
- the cladding material 22 is cured by irradiating the cladding material 22 with ultraviolet energy through the substrate 32.
- the stamper 33 is separated from the upper clad layer 30 as shown in FIG.
- the stamper 33 is separated, the upper clad layer 30 having a flat upper surface is formed on the substrate 32.
- an ultraviolet curable type monomer or oligomer that is a precursor of a polymer having a refractive index lower than that of the core material 27 is used on the lower cladding layer 26 and the core 28.
- the upper surface of the upper cladding layer 30 is turned upside down with the substrate 32, and the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the upper surface of the adhesive resin 34 is sandwiched between the lower cladding layer 26 and the upper cladding layer 30. Thin Push out.
- the adhesive resin 34 is irradiated with ultraviolet energy through the substrate 21 or 32, and the adhesive resin 34 is cured.
- the lower cladding layer 26 is bonded.
- the front and back substrates 32 and 21 are peeled off from the upper cladding layer 30 and the lower cladding layer 26, respectively, to form a film, and a film optical waveguide 35 as shown in FIG. 6 (e) is obtained.
- FIG. 7 is a view for explaining a method of manufacturing a film optical waveguide according to Embodiment 3 of the present invention.
- the lower cladding layer 26 shown in FIG. 7 (a) is the lower cladding layer 26 manufactured on the substrate 21 by the same process as in FIGS. 2 (a) to 2 (d) of the first embodiment.
- a concave groove 25 is formed on the upper surface.
- the upper cladding layer 30 shown in FIG. 7 (b) is the upper cladding layer 30 manufactured on the substrate 32 by the same process as in FIGS. 5 (a) to 5 (d) of the second embodiment.
- Example 3 as shown in FIG. 7C, the core material 27 is applied to the region of the groove 25 on the upper surface of the lower cladding layer 26 in FIG. 7A.
- the core material 27 is a monomer or oligomer that is a polymer precursor having a higher refractive index than the lower cladding layer 26 and the upper cladding layer 30, and is an ultraviolet curable resin.
- the upper clad layer 30 is turned upside down together with the substrate 32 and overlapped on the core material 27.
- the core material 27 is sandwiched between the lower clad layer 26 and the upper clad layer 30, and the core material 27 is placed in the groove 25.
- core material 27 is thinly spread over the entire upper and lower cladding layers 30 and 26.
- FIG. 7 (d) ultraviolet energy is applied to the core material 27 through the substrate 21 or 32.
- the core material 27 is cured, and the core 28 is formed in the concave groove 25 by the core material 27 and the upper cladding layer 30 and the lower cladding layer 26 are bonded.
- the front and back substrates 32 and 21 are peeled off from the upper cladding layer 30 and the lower cladding layer 26, respectively, to form a film, thereby obtaining a film optical waveguide 36 as shown in FIG. 7 (e).
- the molding of the core 28 with the core material 27 and the joining operation of the upper cladding layer 30 and the lower cladding layer 26 with the core material 27 can be performed at one time. 36 manufacturing processes can be reduced. Therefore, according to Example 3, the manufacturing process of the film optical waveguide 36 can be rationalized.
- a recess 37 for allowing the core material 27 to escape may be provided on at least one side of the groove 25 provided in the lower cladding layer 26. Good.
- the core material 27 is supplied into the concave groove 25 of the lower cladding layer 26 and then the core material 27 is pressed by the stamper 38 or the upper cladding layer 30 to form the core 28 in the concave groove 25, the excess in the concave groove 25 The core material 27 is extruded from the groove 25.
- the extruded core material 27 becomes a thick resin film between the upper surface of the lower cladding layer 26 and the stamper 38, the optical signal in the core 28 leaks through this resin film, and the film optical waveguide Reliability decreases.
- the excess core material 27 can be quickly pushed out of the concave groove 25 and escape to the depression 37.
- the resin film between the upper surface of the layer 26 and the stamper 38 can be sufficiently thinned by pressing for a short time, and the reliability of the film optical waveguide can be improved.
- the location where the recess for allowing the core material to escape is not limited to the upper surface of the lower cladding layer 26, but may be the stamper 38 or the upper cladding layer.
- the hydroxy group, carboxyl group, carboxyl group, amino group, imino group are formed on the upper clad layer 30 or the core 28 that is in contact with the lower clad layer 26 made of elastomer. If a modified acrylate resin containing a hydrogen bonding group such as this is used, the adhesion of the interface contacting the lower cladding layer 26 can be improved. Similarly, a hydrogen bonding group such as a hydroxy group, a carboxyl group, a carboxylic group, an amino group, or an imino group is formed on the lower cladding layer 26 or the core 28 that is in contact with the upper cladding layer 30 made of elastomer. If the resin containing it is used, the adhesion of the interface in contact with the upper cladding layer 30 can be improved. Can do.
- FIG. 9 is a plan view showing a film optical waveguide module for one-way communication according to Embodiment 4 of the present invention
- FIG. 10 is a schematic sectional view showing a part thereof enlarged.
- the film optical waveguide module 91 includes a light projecting element 93 mounted on one wiring substrate 92 and a light receiving element 95 mounted on the other wiring substrate 94, with both ends of the film optical waveguide 96 according to the present invention. By connecting, the film optical waveguide 96 connects the wiring boards 92 and 94 together.
- a driving IC 97 and a surface light emitting type light emitting element 93 such as VCSEL are mounted on the wiring substrate 92 on the transmission side.
- the light emitting direction of the light projecting element 93 is substantially perpendicular to the upper surface of the wiring board 92.
- one end of the film light guide 96 is cut at an angle of 45 °, the end of the film light guide 96 is parallel to the wiring board 92, and 45 °
- the surface 100 is fixed on the support base 98 so that the surface 100 cut in an oblique direction faces upward.
- the surface 100 of the core 28 cut at 45 ° is located on the optical axis of the light beam emitted from the light projecting element 93.
- an amplification IC 99 and a light receiving element 95 are mounted on the reception-side wiring board 94.
- the other end of the film light guide 96 is also cut at an angle of 45 °, the end of the film light guide 96 is parallel to the wiring board 94, and the surface cut at 45 ° is diagonal. It is fixed on a support base (not shown) so as to face upward.
- the light receiving element 95 is located directly below the surface of the core 28 cut at 45 °.
- the electric signal input to the driving IC 97 is converted into an optical signal (modulated light) and the optical signal is emitted from the light projecting element 93
- the light emitted from the light projecting element 93 is converted into a film optical waveguide.
- the optical signal entering the core 28 is totally reflected by the surface cut at 45 ° of the core 28, so that the traveling direction is bent in a direction substantially parallel to the length direction of the core 28, and is combined with the core 28. .
- the optical signal coupled to one end of the film optical waveguide 96 propagates through the core 28 and reaches the other end of the film optical waveguide 96.
- the light reaching the other end of the film light guide 96 is totally reflected by the 45 ° cut surface of the core 28 and directed downward from the other end of the film light guide 96.
- the light is received by the light receiving element 95.
- the optical signal received by the light receiving element 95 is converted into an electric signal.
- the electric signal is amplified by the amplifying IC 99 and then output from the wiring board 94 to the outside.
- the wiring board 92 and the wiring board 94 are not necessarily installed on the same plane, but the film light guide is provided even if the wiring boards 92 and 94 are installed on an arbitrary plane.
- an optical signal can be transmitted from the wiring board 92 side to the wiring board 94 side.
- the film optical waveguide module 91 of the present invention the bending elastic moduli of the upper and lower cladding layers 30 and 26 are as small as 1 / OOOMPa or less, so that the number of bows I is small as shown in FIG. 11 (a).
- the film optical waveguide module 91 is extended only by applying a tension, and the width of the film optical waveguide module 91 is reduced.
- the core 28 is also stretched and its core diameter is reduced, or the core cross section is deformed.
- the mode of the propagating optical signal changes and the optical signal transmission characteristics deteriorate.
- the bending elastic modulus of the core 28 is made larger than the bending elastic modulus of the upper and lower cladding layers 30 and 26. That is, the bending elastic modulus of the upper and lower cladding layers 30 and 26 is set to 1, OOOMPa or less, and the bending elastic modulus of the core 28 is made larger than the bending elastic modulus of the upper and lower cladding layers 30 and 26. As a result, the rigidity of the upper and lower cladding layers 30 and 26 is lower than that of the core 28, and the force of the core 28 is not directly fixed to the wiring boards 92 and 94.
- the film optical waveguide module 91 for one-way communication has been described.
- a film optical waveguide module for two-way communication may be used.
- both wiring boards 92 and 94 both have a driving and amplification IC 102 having functions of a driving IC and an amplification IC, and a light emitting element. 93 and a light receiving element 95 are mounted.
- one core 28 connects the light projecting element 93 of the wiring board 92 and the light receiving element 95 of the wiring board 94, and the other core connects the wiring board 94.
- the light emitting element 93 and the light receiving element 95 of the wiring board 92 are connected. Therefore, according to the film optical waveguide module 101, an electric signal input to one of the wiring substrates 92 or 94 is propagated as an optical signal through the film optical waveguide module 101, and the other wiring substrate 94 or It is restored to an electrical signal from 92 and output.
- the light-emitting element and the light-receiving element are connected by the film optical waveguide! /
- the film optical waveguide module has been described, but both ends are connected to the optical connector mounted on the circuit board.
- the circuit boards may be connected to each other.
- FIG. 13 is a perspective view showing a foldable mobile phone 41 that can be folded in half
- FIG. 14 is a schematic configuration diagram thereof.
- a display unit 44 including a liquid crystal display panel 42 and a digital camera 43, and an operation unit 47 including a key panel 45 such as a numeric keypad and an antenna 46 are rotatably connected by a hinge unit 48. It has a structure.
- the digital camera 43 is provided on the back side of the liquid crystal display panel 42.
- an external memory 49 is mounted in the display unit 44, and an integrated circuit (LSI) 50 for receiving communication functions and inputs from the key panel 45 and executing the respective functions in the operation unit 47. Is installed.
- LSI integrated circuit
- Example 5 In the cellular phone 41 shown in FIG. 14, the film optical waveguide 51 according to the present invention is used to connect the operation unit 47 side and the display unit 44 side, as shown in FIG. That is, the integrated circuit 50 in the operation unit 47, the liquid crystal display panel 42 in the display unit 44, the digital camera 43, and the external memory 49 are connected by the film optical waveguide 51 so that transmission / reception can be performed with an optical signal. .
- the film optical waveguide 51 needs to pass through the hinge portion 48.
- the hinge portion 48 is formed by bending a film optical waveguide 51 in a spiral shape as shown in FIG.
- the flat film optical waveguide 51 may be wound around an indicator rod or the like and attached with a curl. Since the film optical waveguide 51 according to the present invention can be bent so as to have a small radius of curvature, there is no possibility that the film optical waveguide 51 will be damaged even if it is formed in a spiral shape in this way.
- the film optical waveguide 51 of the present invention has a high bending performance, there is little risk of the film optical waveguide 51 being damaged even when the cellular phone 41 is repeatedly opened and closed. Furthermore, since the film optical waveguide 51 is formed in a spiral shape at the hinge portion 48, the film optical waveguide 51 is difficult to apply a large load to the film optical waveguide 51 at the hinge portion 48 even when the cellular phone 41 is opened and closed. Durability is further improved.
- the mobile phone 41 is not limited to the display unit 44 and the operation unit 47 folded in two, and the display unit 44 can be folded in a plane parallel to the operation unit 47 and folded. It may be.
- FIG. 16 is a schematic diagram showing a different example of the mobile phone 111.
- This mobile phone 111 is a two-axis rotary type mobile phone.
- the display unit 44 and the operation unit 47 can be folded and expanded in half by the hinge unit 48.
- the display section 44 can be rotated around the axial direction orthogonal to the axial direction of the hinge section 48 by the hinge section 112.
- an optical connector 114 is provided on the wiring board 113 accommodated in the operation unit 47, and the optical connector 116 is provided on the wiring board 115 accommodated in the display unit 44. Is provided.
- the optical connector 117 provided at one end of the film optical waveguide 51 is coupled to the optical connector 114, and the optical connector 118 provided at the other end of the film optical waveguide 51 is coupled to the optical connector 116.
- the wiring board 11 3 of the operation unit 47 and the wiring board 115 of the display unit 44 are connected via 51. When the display unit 44 and the operation unit 47 are opened, the film optical waveguide 51 connects the wiring substrate 113 and the wiring substrate 115 almost straight.
- the film optical waveguide 51 is bent and bent, and when the display unit 44 is rotated by the hinge unit 112, a film is formed.
- the optical waveguide 51 is twisted.
- the flexural modulus of the upper and lower clad layers 30 and 26 of the film optical waveguide 51 is l, OOOMPa or less! / Therefore, the film optical waveguide 51 is easily bent or twisted with a small external force.
- the core diameter can be adjusted even if the film optical waveguide 51 is pulled or twisted.
- the transmission characteristics of the film optical waveguide 51 whose shape is difficult to change, are unlikely to deteriorate. That is, when the film optical waveguide 51 is twisted as shown in FIG. 17 (a), the film optical waveguide 51 is deformed as shown in FIG. 17 (b), and the core 28 is also deformed. There is a risk that the transmission characteristics of the will deteriorate.
- the core shape will change even if the film optical waveguide 51 is twisted. (The film transmission characteristics deteriorate due to deformation of the core shape when the film optical waveguide 51 is pulled are as described above.)
- the width of the film optical waveguide 51 is W
- the length of the twisted portion of the total length of the film optical waveguide 51 is a XW.
- the value of a is preferably as small as possible.
- the value of a is smaller than about 1, the shape of the twisted film optical waveguide 51 is distorted, and the transmission characteristics are deteriorated. Therefore, it is desirable to reduce the wiring space occupied by the film optical waveguide 51 so that the value of a is as close to 1 as possible. There is a relationship as shown in FIG.
- the bending elastic modulus of the upper and lower cladding layers 30 and 26 should be approximately 250 MPa or less in order to make the value of ⁇ close to 1.
- the bending and elasticity of the upper and lower cladding layers 30 and 26 of the film optical waveguide 51 are set to 250 MPa or less, so that the value of a approaches 1 without causing poor connection of the optical connectors 117 and 118. Can be small.
- the hinge portion 48 can be made smaller.
- the film light guide 51 has a natural length with no slack.
- the film optical waveguide 51 is wound around the hinge portion 48, whereby a tensile force is applied to the film optical waveguide 51.
- the bending elastic modulus of the core 28 is made smaller than the bending elastic modulus of the upper and lower cladding layers 30 and 26, as described in the part of FIGS. 11 (a) and 11 (b).
- the deformation of the core 28 can be reduced, and the deterioration of the transmission characteristics of the film optical waveguide 51 can be reduced.
- FIG. 21 is a perspective view of a printer 61 that is Embodiment 6 of the present invention.
- the print head 62 is fixed on a support portion 65, and the support portion 65 travels left and right along a guide bar 63. Also, print information is sent from the printer main body 64 to the print head 62.
- the control unit 66 and the print head 62 in the printer main body 64 are connected to the film light guide according to the present invention. Connected by waveguide 51.
- the dot density (dpi) is increased, and the printing speed is increased, the amount of signal transmitted from the printer main body 64 to the print head 62 is increased rapidly. As a result, a large-capacity signal can be transmitted to the print head 62 at high speed.
- FIG. 24 is a perspective view of a hard disk device 71, which is Embodiment 7 of the present invention.
- a data reading head driving device 73 is installed in the vicinity of the hard disk 72, and the tip of the reading head 74 extended from the data reading head driving device 73 faces the surface of the hard disk 72.
- one end of the film light guide 51 is connected to the circuit board 75 on which the control circuit is mounted, and the other end of the film light guide 51 passes through the base of the read head 74 to the optical element at the tip of the read head 74. It is connected.
- the film light guide 51 has a function of transmitting data (optical signal) between the circuit board 75 and the read head 74 when reading or writing data stored in the hard disk 72.
- the data stored in the hard disk device 71 has a large capacity.
- the flexible printed circuit board that has been used as a conventional data transmission line has a limited transmission density, and the number of flexible printed circuit boards is increased for use in the data transmission line of a hard disk drive that has a large capacity.
- There is a problem in bending performance and size because there is only a means to increase the force and the force to increase the size.
- the film optical waveguide 51 it is possible to realize a data transmission path having flexibility and a small force and a large capacity.
- FIG. 25 to FIG. 27 show an embodiment showing the connection form of the film optical waveguide 51 to the electronic circuit board. That is, in the form shown in FIG. 25, the film optical waveguide 51 is bent to connect the separate electronic circuit boards 82 and 83 in the device 81. In the form shown in FIG. 26, the front and back of the electronic circuit board 82 are connected by the film optical waveguide 51. In the form shown in FIG. 27, the electronic circuit board 82 and the connector 84 are connected by the film optical waveguide 51. In any of these connection forms, high-speed and large-capacity communication can be realized between electronic circuit boards located in a limited space.
- FIG. 28 is an example showing another method of using the film optical waveguide 51 according to the present invention.
- Example 9 in the electronic circuit board 86 having the concavo-convex part 85 on the film optical waveguide 51, for example, in the electronic circuit board 86 having the concavo-convex part 85 formed by mounting an electronic component or the like, A film optical waveguide 51 is installed along the line. According to the embodiment, it can be used for a transmission line connecting the electronic circuit boards on which the electronic components are mounted, and high-speed and large-capacity communication within the electronic circuit board can be realized.
- FIG. 29 is an example showing still another method of using the film optical waveguide 51 according to the present invention.
- the film optical waveguide 51 is overlaid on the flexible electronic circuit board 86. According to such a form, it is overlaid on the flexible electronic circuit board 86. According to such a configuration, it is possible to realize a flexible composite transmission line that has power transmission and calculation functions by the flexible electronic circuit board 86 and also has a high-speed, large-capacity communication function.
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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JP2006523764A JP3906870B2 (ja) | 2004-06-25 | 2005-06-27 | フィルム光導波路の製造方法 |
EP05752950A EP1760502B1 (en) | 2004-06-25 | 2005-06-27 | Method for manufacture of a film optical waveguide |
AT05752950T ATE541231T1 (de) | 2004-06-25 | 2005-06-27 | Herstellungsverfahren eines optischen filmwellenleiters |
US11/630,229 US7496266B2 (en) | 2004-06-25 | 2005-06-27 | Film waveguide, method of manufacturing film waveguide, and electronic device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2004189035 | 2004-06-25 | ||
JP2004-189035 | 2004-06-25 |
Publications (1)
Publication Number | Publication Date |
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WO2006001434A1 true WO2006001434A1 (ja) | 2006-01-05 |
Family
ID=35781864
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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PCT/JP2005/011771 WO2006001434A1 (ja) | 2004-06-25 | 2005-06-27 | フィルム光導波路及びその製造方法並びに電子機器装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US7496266B2 (ja) |
EP (1) | EP1760502B1 (ja) |
JP (1) | JP3906870B2 (ja) |
CN (1) | CN100489578C (ja) |
AT (1) | ATE541231T1 (ja) |
WO (1) | WO2006001434A1 (ja) |
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WO2007080932A1 (ja) | 2006-01-11 | 2007-07-19 | Omron Corporation | 光ケーブルモジュール及びそれを用いた機器 |
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JP4905359B2 (ja) * | 2006-01-11 | 2012-03-28 | オムロン株式会社 | 光ケーブルモジュール及びそれを用いた機器 |
WO2008088016A1 (ja) * | 2007-01-18 | 2008-07-24 | Omron Corporation | 光伝送モジュール、及び電子機器 |
JPWO2008088016A1 (ja) * | 2007-01-18 | 2010-05-13 | オムロン株式会社 | 光伝送モジュール、及び電子機器 |
KR101016546B1 (ko) | 2007-01-18 | 2011-02-24 | 오무론 가부시키가이샤 | 광전송 모듈 및 전자 기기 |
JP5120264B2 (ja) * | 2007-01-18 | 2013-01-16 | オムロン株式会社 | 光伝送モジュール、及び電子機器 |
US8655126B2 (en) | 2009-03-26 | 2014-02-18 | Panasonic Corporation | Method of manufacturing optical waveguide having mirror face, and optoelectronic composite wiring board |
JP2012073358A (ja) * | 2010-09-28 | 2012-04-12 | Nitto Denko Corp | コネクタ用光導波路の製法 |
JP2014197363A (ja) * | 2013-03-06 | 2014-10-16 | 日東電工株式会社 | 位置センサ |
US9811211B2 (en) | 2013-03-06 | 2017-11-07 | Nitto Denko Corporation | Position sensor |
Also Published As
Publication number | Publication date |
---|---|
EP1760502A4 (en) | 2010-08-11 |
US7496266B2 (en) | 2009-02-24 |
ATE541231T1 (de) | 2012-01-15 |
EP1760502A1 (en) | 2007-03-07 |
JPWO2006001434A1 (ja) | 2007-08-02 |
JP3906870B2 (ja) | 2007-04-18 |
CN100489578C (zh) | 2009-05-20 |
CN1973224A (zh) | 2007-05-30 |
EP1760502B1 (en) | 2012-01-11 |
US20080193094A1 (en) | 2008-08-14 |
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