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Resin composition for forming optical waveguide and optical waveguide using the composition

A resin composition and optical waveguide technology, applied in the field of optical waveguides, can solve the problems of sacrificing flexibility, viscosity, increase in refractive index of cladding, deterioration of optical loss, etc., to improve viscosity, improve bending loss, and maintain low refractive index. Effect

Inactive Publication Date: 2013-06-26
NITTO DENKO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned compounding design, the use of an aromatic binder resin increases the refractive index of the cladding layer, and in the material for forming the optical waveguide facing the optoelectronic hybrid substrate, there will be a necessary bending of the optical waveguide. Tendency to worsen wear and tear
In addition, when an aliphatic bifunctional resin capable of imparting a low refractive index is added to compensate for the increase in the refractive index, flexibility and viscosity are sacrificed, and the trade-off becomes a problem (for example, refer to Patent Documents 1 and 2).

Method used

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  • Resin composition for forming optical waveguide and optical waveguide using the composition
  • Resin composition for forming optical waveguide and optical waveguide using the composition
  • Resin composition for forming optical waveguide and optical waveguide using the composition

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] First, before fabricating the optical waveguide of the example, each photosensitive varnish as a cladding layer forming material and a core layer forming material was prepared.

[0060] Preparation of cladding-forming materials

[0061] Under light-shielding conditions, mix 30 g of polyvinyl butyral in 233 g of cyclohexanone [manufactured by Sekisui Chemical Co., Ltd., S-LEC BM-1: in formula (1), R=-C 3 h 7 , k=65±3, m=3 or less, n=about 34, weight average molecular weight 40000], 35g of urethane acrylate resin (manufactured by Mitsubishi Chemical Corporation, UA-160TM), 35g of trimethylolpropane (EO ) triacrylate resin (manufactured by Sanyo Chemical Co., Ltd., TA-401), 1.0 g of IRGACURE 819 (manufactured by Ciba Japan K.K.) and 3.0 g of IRGACURE 127 (manufactured by Ciba Japan K.K.) as photoradical polymerization initiators, and in It was stirred under heating at 85°C to dissolve it completely, then cooled to room temperature (25°C), and then heated and pressure-f...

Embodiment 2

[0072] When preparing the photosensitive varnish as the cladding material, the resin component ratio was changed to 40g of polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd., S-LECBM-1), 30g of urethane acrylate resin (manufactured by Mitsubishi Chemical Corporation, UA-160TM), 30 g of trimethylolpropane (EO) triacrylate resin (manufactured by Sanyo Chemical Corporation, TA-401). In the same manner as in Example 1 except for this, an optical waveguide in which a lower cladding layer was formed on a silicon wafer substrate, a core layer with a predetermined pattern was formed on the lower cladding layer, and an upper cladding layer was formed on the core layer was manufactured. .

Embodiment 3

[0074] When preparing the photosensitive varnish as the cladding material, the resin component ratio was changed to 50 g of polyvinyl butyral (manufactured by Sekisui Chemical Co., Ltd., S-LECBM-1), 25 g of urethane acrylate resin (manufactured by Mitsubishi Chemical Corporation, UA-160TM), 25 g of trimethylolpropane (EO) triacrylate resin (manufactured by Sanyo Chemical Corporation, TA-401). In the same manner as in Example 1 except for this, an optical waveguide in which a lower cladding layer was formed on a silicon wafer substrate, a core layer with a predetermined pattern was formed on the lower cladding layer, and an upper cladding layer was formed on the core layer was manufactured. .

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Abstract

A resin composition for forming an optical waveguide is used as a material for forming an optical waveguide, in particular, a material for forming a clad layer, and brings together excellent bending resistance, a low refractive index and low tackiness suitable for a roll-to-roll (R-to-R) process. The resin composition for forming the optical waveguide to be used in formation of an optical waveguide includes a polyvinyl acetal compound having a structural unit represented by the following general formula (1) as a main component: in the formula (1), R represents an alkyl group having 1 to 3 carbon atoms, and k, m, and n represent ratios of respective repeating units in a main chain and each represent an integer of 1 or more.

Description

technical field [0001] The present invention relates to a resin composition for forming an optical waveguide that is used as a material for forming a cladding layer and the like constituting an optical waveguide in an optical waveguide device widely used in optical communication, optical information processing, and other general optics, such as an optoelectronic hybrid substrate, and The optical waveguide using it. Background technique [0002] Optical waveguide forming materials for optoelectronic hybrid substrates are required to have properties such as high flexibility and low refractive index according to their intended use. Furthermore, in order to be suitable for a roll-to-roll (roll-to-roll: R-to-R) process in consideration of mass production, low tack is an essential characteristic. [0003] Conventionally, in order to impart high flexibility, a low elastic modulus has been generally sought for the cladding layer forming material of the optical waveguide. Furthermo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03F7/004G02B6/12
CPCC08F216/06C08F216/38C08F218/08G02B1/048G02B6/138C08F16/38C08L29/14G02B1/04G02B6/12C09D133/08C09D133/14C09D137/00G02B2006/12069G02B2006/12097G02B2006/1219
Inventor 平山智之疋田贵巳
Owner NITTO DENKO CORP
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