Nitto-denko Corporation

Ryusuke Naitou

Amane Mochizuki

Kazunori Mune

Takahiro Fukuoka

Hirofumi Fujii

Akiko Nagafuji

Kenichi Tagawa

Shunichi Hayashi

A method for manufacturing an optical waveguide includes: step A of forming a first resin layerby allowing a first liquid-state resin to flow to be extended in a manner so as to bury and enclose cores; step B of forming a second resin layerby allowing a second liquid-state resin having a viscosity higher than that of the first liquid-state resin to flow to be extended on the first resin layer, after or while the first resin layeris heated; and step C of forming an over-cladding layerby curing the first resin layerand the second resin layer

Method for manufacturing optical waveguide

The invention provides a process for producing an optical waveguide, which comprises the steps of: forming a substrate adhesion layer on a surface of a substrate from a layer-forming material containing a coupling agent; forming an undercladding layer on the substrate adhesion layer; and forming a core layer having a predetermined pattern on the undercladding layer through a wet process with a developing solution.

Process for producing optical waveguide

A photosensitive polyimide resin precursor composition capable of providing a polyimide resin that is not substantially colored, is transparent and has heat resistance, an optical polyimide resin obtained from the composition, and an optical waveguide using the polyimide resin. The photosensitive polyimide resin precursor composition contains (a) 100 parts by weight of a polyamic acid obtained from a tetracarboxylic acid dianhydride and a diamine, (b) 0.01 parts by weight or more and less than 5 parts by weight of a 1,4-dihydropyridine derivative, (c) 5&#x2013;50 parts by weight of a glycol (ether). The optical polyimide resin is obtained by irradiating the photosensitive resin precursor composition with UV light, followed by exposure, heating, development, and then heating. The optical waveguide comprises a core layer comprising the optical polyimide resin, and a cladding layer thereof.

Photosensitive polyimide resin precursor composition, optical polyimide obtained from the composition, optical waveguide using the polyimide, and process for producing the optical waveguide

Growing community of inventors

Ibaraki, Japan

Ryusuke Naitou